ML17130A486
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PBAPS FIRE PROTECTION PROGRAM TABLE OF CONTENTS CHAPTER 1 INTRODUCTION CHAPTER 2 FIRE PROTECTION SYSTEM DESCRIPTION 2.1 Fire Protection Water Supply Systems 2.2 Wet Pipe Sprinkler Systems 2.3 Pre-Action Sprinkler Systems 2.4 Deluge Systems 2.5 Water Spray for Charcoal Filters 2.6 Wet Standpipes and Hose Stations 2.7 Foam Extinguishing Stations 2.8 Low Pressure Carbon Dioxide System 2.9 Dry Chemical Systems 2.10 Water Curtain Systems 2.11 Portable Fire Extinguishers 2.12 Fire and Smoke Detection System CHAPTER 3 COMPARISON BETWEEN PBAPS FIRE PROTECTION PROGRAM AND NRC GUIDELINE DOCUMENTS 3.1 NRC Branch Technical Position APCSB 9.5-1, Appendix A 3.2 Appendix R of Title 10 CFR, Part 50 3.3 Safety Evaluation Report CHAPTER 4 EVALUATION OF POTENTIAL FIRE HAZARDS 4.1 Scope of Evaluation 4.2 Procedure CHAPTER 5 ANALYSIS OF CAPABILITY TO ACHIEVE SAFE SHUTDOWN 5.1 Methodology 5.2 Description of Reactor Shutdown Methods 5.3 Safe Shutdown Analysis by Fire Area CHAPTER 6 SPECIAL TOPICS 6.1 Analysis of Associated Circuits 6.2 Analysis of High/Low Pressure Interfaces 6.3 Analysis of the Yard 6.4 Individual Plant Examination for External Events -
Internal Fires Analysis FPP i Rev. 17, April 2009
PBAPS FIRE PROTECTION PROGRAM TABLE OF CONTENTS CHAPTER 7 FIRE PROTECTION REQUIREMENTS 7.1 Introduction 7.2 Deleted 7.3 Deleted 7.4 Deleted FPP ii Rev. 17, April 2009
PBAPS FIRE PROTECTION PROGRAM APPENDIX A TABLES A-1 Fire Protection Program A-2 Heat of Combustion Values A-3 Components Required for Safe Shutdown A-4 Operations That May be Required to be Performed Outside the Control Room A-5 Valves That Serve as Interfaces between Low Pressure Piping and the RCPB FPP iii Rev. 17, April 2009
PBAPS FIRE PROTECTION PROGRAM APPENDIX B LIST OF FIGURES B-1 DELETED B-2 DELETED B-3 Fire Protection Water Supply Yard Piping B-4 General Floor Plan, EL. 91'-6" B-5 General Arrangement Plan at EL. 116'-0" B-6 General Floor Plan, EL. 135'-0", 150'-0" B-7 General Floor Plan, EL. 165'-0" B-8 General Floor Plan, EL. 195'-0" B-9 General Floor Plan, EL. 234'-0" B-10 General Floor Plan, Diesel Generator Building B-11 General Floor Plan, Recombiner Building B-12 General Floor Plan, C.W. Pump Structure B-13 General Floor Plan, Emergency Cooling Towers B-14 DELETED B-15 DELETED B-16 DELETED B-17 DELETED B-18 DELETED B-19 DELETED FPP iv Rev. 17, April 2009
PBAPS FIRE PROTECTION PROGRAM LIST OF FIGURES (cont'd)
B-20 DELETED B-21 DELETED B-22 DELETED B-23 DELETED B-24 DELETED B-25 DELETED B-26 DELETED B-27 DELETED B-28 DELETED B-29 DELETED B-30 DELETED B-31 DELETED FPP v Rev. 17, April 2009
PBAPS FIRE PROTECTION PROGRAM APPENDIX C Letter References FPP vi Rev. 17, April 2009
CHAPTER 1 INTRODUCTION The licensee was requested by the Nuclear Regulatory Commission (NRC) in 1976 to provide a fire hazards analysis (FHA) and to propose Technical Specification changes addressing increased fire protection at Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3. The licensee prepared an FHA and submitted it to the NRC in 1977. The FHA summarized the evaluation of combustible loading as well as the comparison of the fire protection program to Appendix A to Branch Technical Position APCSB 9.5-1, "Guidelines for Fire Protection for Nuclear Power Plants Docketed Prior to July 1, 1976." On May 23, 1979, the NRC issued a Safety Evaluation Report (SER) addressing the Fire Protection Program at Peach Bottom, with Supplement No. 1 to the SER issued August 14, 1980; Supplement No. 2 issued September 15, 1980; Supplement No. 3 issued October 10, 1980; and Supplement No. 4 issued November 24, 1980. On October 10, 1985, the NRC issued an SER for the installation of carpeting in the control room.
The Fire Protection Program (FPP) updates the 1977 FHA and evaluates the existing fire protection features for compliance with NRC requirements. The FPP also incorporates analysis performed in response to issues identified since the initial 1986 submittal of the FPP. Additional analyses were performed in response to: 1) Generic Letter 88-20 Supplement 4, Individual Plant Examination for External Events (IPEEE) for Severe Accident Vulnerabilities Section 4 Internal Fires Analysis; and 2)
Generic Letter 92-08 which raised 3 primary concerns with the Thermo-Lag 330-1 raceway encapsulation material; 1) the fire endurance capability of Thermo-Lag 330-1 barriers, 2) the ampacity derating of cables enclosed in Thermo-Lag 330-1 barriers, and 3) the evaluation and application of the results of tests conducted to determine the fire endurance ratings and the ampacity derating factors of Thermo-Lag 330-1 barriers. The FPP is a summary of all aspects of the Peach Bottom fire protection program. On September 16, 1993, the NRC issued an SER for the PBAPS FPP through revision 4.
It is the philosophy of the licensee that fire protection be provided for all company facilities to minimize the effects of a fire. At Peach Bottom, fire protection was an original design objective and has evolved as the state of the art for fire protection in nuclear power plants changed. Responsibility for the fire protection program is vested in licensee managerial personnel in the same manner as other operating and design responsibilities. To support these responsibilities, the licensee employs qualified fire protection personnel to ensure that an adequate fire protection program is provided.
FPP 1-1 REV. 16, APRIL 2007
The term "fire protection system" refers to the integrated complex of components and equipment provided for detection and suppression of fires. In addition to this system, the "fire protection program" includes the concepts of design and layout implemented to prevent or mitigate fires, administrative controls and procedures, and personnel training. The fire protection program uses a defense-in-depth approach aimed at preventing fires, minimizing the effect of any fires that occur, providing appropriate fire detection and suppression equipment, and training personnel in fire prevention and fire fighting.
The FPP has been prepared by qualified personnel, including registered fire protection engineers. The fire protection program has been reviewed to verify compliance with fire protection requirements.
Safe and Alternative Shutdown Methods have been analyzed and documented by qualified personnel. The analysis has been reviewed to verify conformance to FSAR analyses.
Chapter 2 of the FPP provides a general description of the fire detection and suppression systems. Chapter 3 presents an item by item comparison of the Peach Bottom Atomic Power Station, Units 2 and 3, fire protection program with the guidelines set forth in Branch Technical Position APCSB 9.5-1, Appendix A, the requirements of Appendix R to 10 CFR 50, and the requirements of the Safety Evaluation Report. Chapter 4 provides a tabulation of the combustible loadings in plant fire areas; describes fire barriers in each area; and fire detection and suppression systems.
The plant is divided into 47 fire areas. Fire areas are not numbered sequentially. Chapter 5 provides an evaluation of the ability to safely shut the plant down in the event of a fire in any plant fire area. Chapter 6 addresses special topics. Chapter 7 describes the fire protection requirements formerly contained in the plant technical specifications.
FPP 1-2 REV. 16, APRIL 2007
CHAPTER 2 FIRE PROTECTION SYSTEM DESCRIPTION This chapter describes the fire suppression and fire detection systems. The specific guidelines and requirement contained in Branch Technical Position APCSB 9.5-1, Appendix A; 10CFR50, Appendix R; and the Safety Evaluation Report (SER) are addressed in Chapter 3.
PBAPS Drawing M-300, Sheets 1 and 2, provided the legend and symbols for the P&Ids. The P&IDs for the fire protection system are provided on PBAPS Drawing M-318, Sheets 1 through 10.
2.1 FIRE PROTECTION WATER SUPPLY SYSTEMS 2.1.1 Water Source The source of water for the PBAPS fire protection system is Conowingo Pond, which has an unlimited capacity. This source allows continuous operation of either pump as long as required.
The fire pumps take suction from independent, isolatable intake wells. Check valves are installed at the pump discharges to prevent water from one source from being pumped into the other source.
2.1.2 Pumps There are two vertical turbine fire pumps, each rated for a minimum of 2,500 gpm at 125 psig total head. The lead pump is electric-motor-driven, and the 100 percent capacity backup pump is diesel-engine-driven. The pumps and their controllers are UL-listed.
The fire water system is capable of supplying water at the required pressure for the largest sprinkler flow plus 500 gpm.
When the fire pumps are not running, the system is normally pressurized by a 2-inch connection to the high pressure lube water system, which takes its suction from the clarified water storage tank and is capable of replenishing 30 to 50 gpm for leakage. The lube water connection is equipped with a relief valve to prevent over-pressurization of the fire main. When a portion of the fire water system is activated, upon a decrease of main header pressure, a low pressure switch set at 140 psig starts the motor driven pump automatically. If the motor driven pump fails to start, the diesel driven pump starts upon a lower pressure signal setpoint of 130 psig. Both pumps are stopped manually.
Power supplies and controls for each pump are independent. The electric power for the motor driven fire pump is taken from the FPP 2-1 REV. 21, APRIL 2017
normal AC power supply and can be taken from an emergency auxiliary bus. Automatic start capability is blocked following a total loss of offsite power to preclude the pump from spuriously loading onto its emergency auxiliary bus. Manual start capability still exists in the control room. Automatic start capability can be reset at the motor controller. Control room alarm displays for the electric-motor-driven pump are: Motor Driven Fire Pump Trouble (i.e., AC power not available, auto start not available, and discharge valve not full open), Motor Driven Fire Pump Running, and Motor Driven Fire Pump Auto Start.
The diesel-engine-driven fire pump is used for standby and loss of AC power. The diesel fuel supply tank for the diesel engine has a capacity of 500 gallons, in addition to the 120-gallon capacity of the diesel fire pump day tank. This fuel volume is more than sufficient to allow operation of the diesel driven fire pump for a period of two hours at the maximum expected water demand as required by applicable regulatory requirements. Control room alarm displays for the diesel driven pump are: Diesel Fire Pump Trouble (i.e. low lube oil pressure, high engine temperature, engine fail to start, overspeed shutdown, low fuel and discharge valve not full open). Diesel Fire Pump Cont Sw Not In Auto, Diesel Fire Pump Running, and Diesel Fire Pump Raw Water Hi Temp.
The fire pumps are located in the Conowingo Pond intake structure in separate seismic Category I rooms. The diesel driven pump is enclosed in a 2-hour fire rated masonry walled room within the Unit 2 high pressure service water pump compartment. Penetrations through the north and west walls have been sealed to provide the required fire resistance in accordance with Appendix R. The motor driven pump is located in the Unit 3 high pressure service water pump compartment. The Units 2 and 3 high pressure service water pump rooms are separated by a steel plate fire wall (refer to Chapter 5, fire area 48 for exemption request).
2.1.3 Yard Piping Fire protection water is distributed to the various areas of the plant from a yard fire main loop which completely encircles the power block. The connections to the yard fire main loop from the two fire pumps located in the Conowingo Pond intake structure are spaced approximately 24 feet apart and are provided with valving so that either connection can be isolated while retaining 100 percent water supply capacity to the yard fire main. The routing of the yard fire main loop and its branch piping is shown in Figure B-3.
The yard fire main loop consists of 12-inch, with 10-inch reductions at sleeve locations, cement-lined, cast iron piping FPP 2-2 REV. 21, APRIL 2017
which is buried below the frost line. The north and south ends of the loop are cross-connected by piping which traverses the Units 2 and 3 turbine enclosures. Locked-open post-indicator valves and underground gate valves provide sectionalized control and isolation of portions of the fire main loop. Hydrants with curb valves are installed, in general, at design intervals of approximately 250 feet with a 290-foot maximum, with the exception of hydrant spacing between hydrants H7 and H9. Each hydrant is provided with a 6-inch gate valve. Four hose houses are located in the yard area at 1,150 feet maximum spacing in the vicinity of the hydrants, each enclosing a hose cart which can be manually moved to any hydrant where it is needed. The system of hydrants connected to the fire main loop is designed in accordance with NFPA 24. Hydrant threads are National Standard and are compatible with local fire department equipment.
Wet pipe sprinkler systems are provided to protect the following areas and equipment:
- a. Turbine building - generator equipment area -
elevation 135 feet
- b. Turbine building - lube oil storage room - elevation 116 feet and turbine lube oil rooms - elevations 135 feet and 150 feet
- c. Turbine building - condenser pits - elevation 102 feet
- d. Turbine building - moisture separator area -elevation 116 feet
- e. Turbine building - lube oil tank area and lube oil equipment area - elevations 116 feet and 135 feet
- f. Turbine building - reactor feed pump turbine area -
elevation 165 feet
- g. Turbine building - turbine bearings, generator bearings and front standard - elevation 165 feet
- h. Turbine building - NMD and blocking/tagging offices -
elevation 165 feet
- i. Radwaste building - drummed waste/storage area -
elevation 135 feet
- j. Circulating water diesel fire pump structure - diesel fire pump room - elevation 112 feet FPP 2-3 REV. 21, APRIL 2017
- k. Turbine building hatchway area at elevations 116 feet and 135 feet and clean clothes room at elevation 116 feet Wet pipe sprinkler systems are normally filled with pressurized water. Local pressure indicators are provided above and below alarm check valve seats to provide system status. Wet pipe sprinklers actuate automatically when ambient temperature exceeds the melting point of the fusible element at the sealed sprinkler heads, allowing pressurized water to discharge through the open sprinkler heads. The actuation temperature of sprinkler heads varies by application.
System actuation is detected by an alarm check valve assembly (via a pressure switch) or by a flow switch. These devices initiated an alarm in the main control room. Each wet pipe sprinkler system has an isolation valve, which is either monitored by a tamper switch, or locked in the open position. Wet pipe sprinkler system operation is terminated manually by shutting the manual isolation valve.
2.3 PRE-ACTION SPRINKLER SYSTEMS Pre-action sprinkler systems are provided to protect the following areas and equipment:
- a. Radwaste building - reactor recirculation pump motor -
generator sets.
- b. Radwaste building - above recirculation pump motor generator set lube oil pump motor base in the cooling water equipment rooms (Unit 2).
- c. Radwaste building - Fan Room (Room No. 381).
- d. Turbine building - Emergency Switchgear and Battery Rooms and Corridor 262 - elevation 135 feet.
- e. Turbine building - 13 kV Switchgear Area - elevation 116 feet.
Each pre-action sprinkler system consists of a deluge valve, a piping system pressurized with nitrogen gas, a nitrogen pressure detection system, and fusible-element sprinkler heads. The sprinkler heads will open upon a rise in ambient temperature to the melting point of each individual fusible element. The actuation temperature of sprinkler heads varies by application.
The protected areas, a through e, listed above, are monitored by smoke detectors that alarm in the control room and provide FPP 2-4 REV. 21, APRIL 2017
input to open the deluge valves. Upon automatic or manual deluge valve operation, a flow switch energizes a local alarm and initiates an alarm condition on the fire protection panels in the Main Control Room.
Single interlocked systems (items a, b, and c, above) are automatically actuated by a fire detection signal, which sends a signal to open the deluge valve, thus supplying water to the sealed sprinkler heads. Once the ambient temperature melts one or more fusible elements, water, under pressure, will flow out of the open sprinkler heads.
Double interlocked systems (items d and e, above) are automatically actuated by the combined fire detection signal (smoke detector) and low-pressure nitrogen signal (loss of nitrogen pressure through the open sprinkler). Upon receiving both signals, the deluge valve will open and water, under pressure, will flow out of the open sprinklers. A loss of nitrogen pressure will occur as a result of the open sprinkler head, initiating both a local alarm and an alarm condition in the control room.
Manual pre-action systems protect the turbine lagging (under the skirt area) for each unit. These systems are similar to the pre-action systems described above, except there are not any smoke or heat detectors associated with this system. Once the ambient temperature under the turbine lagging increases to melting point of the fusible elements, the nitrogen will flow out of the open sprinkler heads. The decrease in nitrogen pressure will result in an alarm condition in the control room. The deluge valve, however, must be manually actuated in order to indicate water flow to the open sprinkler heads.
A manual isolation valve is located upstream of the deluge valve.
The isolation valve is either locked in the open position or provided with a monitored tamper switch. System operation can only be terminated manually by shutting the manual isolation valve.
2.4 DELUGE SYSTEMS Deluge systems are provided to protect the following areas and equipment:
- a. Turbine building - Elevation 116 feet - hydrogen seal oil units
- b. Yard - main transformers, unit auxiliary transformers, start-up and emergency transformers, and condensate pump transformers FPP 2-5 REV. 21, APRIL 2017
- c. Reactor building - Elevation 135 feet - west corridor water curtain Operation of a deluge sprinkler system or water-spray nozzle system is automatically initiated by a rate of temperature rise or high temperature signal from heat-actuated devices. This signal opens the deluge valve, thus supplying water under pressure to the system. Since all deluge-type sprinkler heads and spray nozzles are always open, water will flow out of each of the sprinkler heads or spray nozzles for the affected system upon opening of the deluge valve. Actuation of the deluge valve also initiates a local alarm and registers the alarm condition on the fire protection panel in the control room. The deluge valve can also be manually actuated.
There is a manual isolation valve prior to each deluge valve. The isolation valve is either locked open or provided with a tamper switch. System operation is terminated manually by shutting the isolation valve.
2.5 WATER SPRAY FOR CHARCOAL FILTERS The charcoal filters in each redundant train of the standby gas treatment system are provided with a manually initiated water spray fire suppression system.
The charcoal filters in the recombiner building ventilation system are provided with an automatically initiated water sprinkler fire suppression system. The water is supplied to the filters through a fixed piping system.
A signal from a heat detector activates and opens a deluge valve for the recombiner building system. Thus water is supplied under pressure to open spray heads for both the recombiner building system and standby gas treatment systems producing a water spray.
Manual release of the deluge valve is possible causing a local and remote alarm to actuate. System operation is terminated manually by shutting the OS&Y gate valve.
For the standby gas treatment system, a signal from a heat detector located in the standby gas treatment system filter plenum will alarm in the control room. The plant fire brigade will be dispatched to investigate and manually activate the system as required.
2.6 WET STANDPIPES AND HOSE STATIONS Wet standpipes for hose stations and portable fire extinguishers are located throughout the plant. All areas on each elevation in the power block are within 30 feet of a nozzle attached to 100 FPP 2-6 REV. 21, APRIL 2017
feet of hose. Each hose station has 100 feet of 1-1/2 inch UL Listed fire hose specifically designed for industrial fire protection. Hose reel carts are located on elevations 165 feet and 195 feet of each reactor building and are each equipped with an additional 200 feet of hose. Standpipes are a minimum of 3 inches in diameter for one or two hose station connections and a minimum of 4 inches in diameter for three or more hose station connections.
The following exceptions have been verified by a hydraulic simulation:
- Hose reels HR-88-5, HR-135-57, and HR-135-54 each have 21/2 inch diameter feeder piping.
- Hose reels HR-116-60, HR-135-65, and HR-165-77 share the same 3 inch diameter feeder piping.
Hose stations are located outside the entrances to the control room, and at the two entrances to the cable spreading room.
Except as noted in Section 3.3-2, Item No. 25, ALFCO spray nozzles are provided for all hose stations.
2.7 FOAM EXTINGUISHING STATIONS A fixed foam system is provided for the protection of the fuel oil storage tank supplying the auxiliary boiler, a nonsafety-related area. The foam is educed from a 125-gallon foam solution tank by water from the main fire water header.
The fuel oil storage tank is provided with a fixed foamer at the tank. Foam making is initiated manually from a local station.
Fire protection inside the auxiliary boiler building is provided by a foam playpipe with hose rack. A valve is manually opened to add water to the foam tank. A second valve is then opened to direct the foam solution to either the hose or the fixed system for the fuel oil storage tank.
The fuel oil storage tank is equipped with a foam nozzle and chamber with a vapor seal. The vapor seal prevents oil from mixing, solidifying, and blocking the foam line. The fuel oil storage tank is also equipped with a foam deflector to forward the foam gently down the inside of the tank for efficient foam distribution and protection.
2.8 LOW PRESSURE CARBON DIOXIDE SYSTEM The low pressure carbon dioxide system (CO2) system is designed in accordance with NFPA 12. In addition to the total flooding CO2 system provided for the areas described below, CO2 fire protection FPP 2-7 REV. 21, APRIL 2017
is provided by CO2 hose reels along the east side of the center of the turbine enclosure operating deck.
The CO2 systems for the cable spreading room, computer room, high pressure coolant injection (HPCI) pump rooms, and high pressure turbine bearing lube oil pumps are supplied from two 6-ton storage tanks. The CO2 systems for the diesel generator bays are supplied by one 2.75-ton storage tank. The design concentrations for the total flooding CO2 systems are 34 percent for the HPCI pump rooms, and diesel generator bays, and 50 percent for the cable spreading room, computer room.
The fixed total flooding CO2 system in each of the four Emergency Diesel Generator (EDG) Rooms is a manually actuated system. Upon receipt of a fire alarm, a fire brigade member is dispatched to the respective room to evaluate the severity of the fire. If required, the CO2 system for any room can be manually initiated by operating the EMPC for the respective room. The EMPCs are located inside the EDG Cardox Room. In order to prevent inadvertent operation of the CO2 fire suppression system due to a seismic event, the system control devices are qualified in accordance with the requirements for safety related components.
The total flooding CO2 system in both the Unit 2 and Unit 3 HPCI Pump Rooms are manually actuated systems. These systems can be manually actuated by manipulation of the EMPC located in the adjacent RCIC Pump Room of the corresponding unit. Heating and ventilating openings contain fusible link fire dampers which close at a temperature of 165F. HVAC system supply ducts are provided with fire dampers automatically actuated by electric release devices.
The fixed total flooding CO2 system for the Cable Spreading Room (CSR) is a manually actuated system. Smoke detection in the CSR annunciates alarms in the Control Room in the event of a fire. If required, the system is manually actuated by manipulation of the EMPC located outside the CSR. HVAC system ducts contain fire dampers provided with automatic electric release devices and fusible links. Ventilation ducts above the doors contain fire dampers provided with fusible links.
The total flooding CO2 system in the computer room is similar to the cable spreading room.
All total flooding CO2 systems are equipped with predischarge alarms, odorizers, and manually operated block valves. All systems alarm in the control room.
CO2 hose reels are activated by removing a playpipe from its holder. An electric switch, located in the playpipe holder, FPP 2-8 REV. 21, APRIL 2017
actuates a control valve to allow CO2 into the hose. A squeeze-type playpipe valve enables the operator to control the flow of the CO2 discharge.
2.9 DRY CHEMICAL SYSTEMS Portable dry chemical fire extinguishers are provided in the vicinity of the reactor feed pump turbines. The dry chemical system on the main turbine bearings has been replaced with an automatic wet pipe sprinkler system.
2.10 WATER CURTAIN SYSTEMS Water curtain suppression systems are provided to establish a division of each reactor enclosure at the west corridor on elevation 135 feet.
Each corridor is protected by an individual water curtain system.
Each water curtain system consists of an OS&Y gate valve, a deluge valve, a local pull station, piping, and open spray heads.
The distribution piping is located at the floor and arranged along one side of the corridor, with sprinklers spaced evenly from the floor to the ceiling. Each water curtain system is actuated by a cross zoned detection system in which a signal must be received from both heat detectors for the system to be initiated. Each system can also be actuated manually at either one of two locations on each unit. The Unit 2 water curtain can be actuated by the remote control actuation station located in the northeast corner, stairwell 19 elevation 135 feet reactor building by the stairwell 26 elevation 135 feet reactor building. The Unit 3 water curtain can be actuated by the remote control actuation station located in the southeast corner, stairwell 22 elevation 135 feet reactor building by the elevator, or the manual pull station in the northwest corner, stairwell 27 elevation 135 feet reactor building. Operation of the system is terminated manually by shutting the OS&Y gate valve, which is located in stairwells 26 and 27 for Units 2 and 3, respectively.
Water curtain suppression systems are provided over each of the two access portals located between column lines J and K at column line 18 (between Unit 2 valve operating area and the 13.kV switchgear area) and at column line 23 (between Unit 3 valve operating and the 13.8kV switchgear area) on the 166-0 elevation of the Turbine Building. Each system consists of piping and closed spray heads. Heat generated by a fire near the 116-0 elevation Access Portals will melt the fusible link on the affected sprinkler heads at a predetermined temperature, causing the sprinkler head to open. Water in the wet pipe sprinkler system will flow out of the opened heads forming a water curtain to prevent the propagation of the fire through the portals. The FPP 2-9 REV. 21, APRIL 2017
source of fire protection water is from the existing Turbine Building area sprinkler system. Operation of the system is terminated manually by closing the OS&Y gate valve HV-0-37B-12406.
Water curtain suppression systems are provided to the HELB vent path openings over doorways 87 and 171 by extending the existing sprinkler systems in the Unit 2 (Room 139) and Unit 3 (Room 179) main turbine lube oil storage tank rooms to provide water curtain protection to the HELB vent path openings. These openings are located above the doors (Door 87 and 171) leading from the main turbine lube oil storage tank rooms to the moisture separator areas on Elevation 116-0. Heat generated by a fire on either side of the doorways will melt the fusable link on the sprinkler heads at a predetermined temperature, causing the sprinkler heads to open. Water in the wet pipe sprinkler system will flow out of the opened heads forming a water curtain to prevent the propagation of the fire through the openings. Operation of the system is terminated manually by closing the OS&Y gate valve HV 37B-42025 or HV-3-37B-52025.
2.11 PORTABLE FIRE EXTINGUISHERS Portable fire extinguishers, using extinguishing agents compatible with the combustible material in the area in which they are located, are provided throughout the plant. Portable fire extinguishers are installed in accordance with NFPA 10 and 10A.
2.12 FIRE AND SMOKE DETECTION SYSTEM 2.12.1 Fire Detection Signaling System The fire detection signaling system complies with the requirements of NFPA 72D, with the following exceptions and clarifications:
- a. Paragraph 4-7.3 - Tests are not presently conducted at the frequencies specified. (Testing is performed in accordance with the frequency and requirements stated in the Technical Requirements Manual. The TRM specifications recognize the inaccessibility of certain fire protection equipment due to inerting or radiation levels.)
- b. Paragraph 4-7.2 - The fire department is not notified immediately upon receipt of a fire alarm signal. (Upon receipt of a fire alarm signal, the plant Fire Brigade is dispatched to the fire location, and Shift Supervision is informed as to the extent and nature of the fire. Based on this information, a decision is made concerning the need for offsite firefighting support.)
FPP 2-10 REV. 21, APRIL 2017
There is no supervised circuit to transmit a signal to the fire department. (The fire department may be notified either by using the telephone or indirectly using the radio system to other company locations.)
An operator is not assigned sole responsibility for fire protection services. (For the operator, operation of the reactor and plant system should take precedence over fire protection service.)
A device is provided that will permanently record fire alarms with the date and time of receipt.
2.12.2 Fire Detection System The fire detection system complies with the requirements of NFPA 72E-1984 with deviations as noted in Section 3.3.2, Item Nos. 1, 2, 5 and 47 except for the Fan Room (no. 381). The Fan Room complies with NFPA 72-1996 and uses the guidelines of Section A-5.3.4.6.1 instead of Section 5-3.4.6 for smoke detector spacing.
The heat and smoke detection sections of the system (with the exception of the hydrogen water chemistry (HWC) heat detectors) are a "Class B" Installation, utilizing a two-wire system with a resistor or capacitor between the wires at the end of the circuit (end-of-line device). Each system (with the exception of the HWC faults, circuit breaks, or a power failure. Fire alarms activate a dedicated Main Control Room annunciator horn and printer to record the event. After acknowledging the fire alarm it will be the responsibility of the control room operator to make the appropriate public address announcement. Upon confirmation of a fire condition the fire brigade will be dispatched to the location of the fire. The fire detection and activation systems are connected to the emergency AC power bus.
Heat and smoke detection is accomplished by the appropriate detectors installed in areas where fire potential exists and in all areas containing safety-related equipment except where a specific exemption was granted by the NRC. The circuits of these installations go directly to local system panels which contain:
- Detector circuits for supervisory and alarm functions (except for the HWC heat detectors)
- Trouble circuits for local panel indication (except for the HWC heat detectors)
- Alarm circuits for local and remote alarming
- Pulse circuits for faulty detector and local indication.
(except for the HWC heat detectors)
These circuits and annunciation are physically separated from those circuits that actuate the fire extinguishing systems (water FPP 2-11 REV. 21, APRIL 2017
suppression/Cardox). However, the 13.8 kV switchgear preaction sprinkler system does not specifically have complete physical separation. Although each circuit is routed in separate conduits, this system utilizes a releasing control panel in which detection, suppression and alarm circuits coexist by way of individual system modules.
The Hydrogen Water Chemistry (HWC) system heat detectors which are located in the Reactor Feed Pump A, B, and C Bays and hallway areas are not installed as "Class B" detectors. The heat detector circuits are not supervised by the emergency AC power bus. These heat detectors are part of the HWC system hydrogen leak detection scheme. The circuit goes from a series of heat detectors to the HWC local control panel, 2(3)0C810, which houses the HWC Programmable Logic Controller (PLC). The HWC PLC then activates an auxiliary relay which ties the circuit to fire protection board 00C001 for annunciation on 00C201. The HWC heat detector circuits are designed such that any HWC heat detector, PLC, circuit break or power failure will result in alarms at both the local HWC panel and the remote Fire Alarm System panel. The detectors are physically located in fire area 50-fire zone 78A, which is equipped with an adequate fire detection and signaling system.
Circuits from the local system panels to the fire terminal cabinets, auxiliary terminal cabinet (00C727), and main terminal cabinet (00C728), and from the main terminal cabinet (00C728) to the main control room fire control cabinet (00C01), are electrically supervised.
Detection of smoke by any smoke detector will activate a control room horn, a dedicated control room printer to record the event, and the appropriate alarm panel (00C201). The activated detector can be identified by the flashing neon lamp on its base. Reset of a detector can be initiated by inserting a key into the reset lock on the panel or by depressing a reset button and confirmed by resetting the alarm window.
With exception of the diesel generator rooms, detection of fire by any heat detector will activate a dedicated control room printer to record the event and the appropriated alarm window will light at the main control room fire alarm annunciator (00C201). Heat detectors are activated by high temperature (190F) or rate-of-rise in temperature (+15F/minute). If activated by high temperature, the detector must be replaced (or isolated) before the audible signal will silence or the control room annunciator will reset.
If activated by rate-of-rise in temperature, each heat detector will reset itself once the heat source is removed.
FPP 2-12 REV. 21, APRIL 2017
In the diesel generator rooms, detection of a fire by a correct two-out-of-sixteen detection logic will activate a control room horn, a dedicated control room printer to record the event, and the appropriate alarm window will light in the main control room fire alarm annunciator (00C201). Heat detectors are activated by high temperature (190F). If activated, the detector will reset itself once the heat source is removed.
This detection scheme utilizes two detectors at each of eight locations. The circuitry between each of the pair of detectors located in close proximity of each other is not electrically supervised.
Detection of trouble with the fire detection system's automatic code transmitting box by the supervisory circuit will initiate an annunciator with the fire alarm control cabinet (00C01).
Confirmation of trouble within the supervisory circuit can be confirmed by a zero reading on a milliammeter within the control cabinet (00C01). Silencing of an alarm is possible by placing the "DET CKT TBL SIL" switch in the down position.
A Notifier SFP-2404 Fire Alarm Control Panel that uses microprocessor technology is installed within the ASD PDC structure. The SFP-2404 is connected to an audible device, smoke detectors, and other system sensors in the PDC. As required by NFPA 72, the notification appliance circuit strobes are synchronized as well as synchronization of standard ANSI audible signals. Activation of a smoke detector activates an audible device, illuminates an indicating LED, and activates an alarm device and annunciator to notify the MCR. The MCR annunciation is provided on panel 30C204L. Additional discussion relating to the annunciation functions and respective windows on panel 30C204L is provided in Section 3.31.6. Refer to ECR markup to drawing E-332, Sht. 2 and drawings B-015-VC-50, Sht. 2 and 8-015-VC-49, Sht. 1.
FPP 2-13 REV. 21, APRIL 2017
CHAPTER 3 COMPARISON BETWEEN PBAPS FIRE PROTECTION PROGRAM AND NRC GUIDELINE DOCUMENTS 3.1 NRC BRANCH TECHNICAL POSITION APCSB 9.5-1, APPENDIX A The purpose of this section is to compare the fire protection provisions of Peach Bottom Atomic Power Station (PBAPS) Units 2 and 3 with the guidelines in Branch Technical Position (BTP) APCSB 9.5-1, Appendix A, and the response made to each guideline in the 1977 Fire Hazards Analysis.
To identify areas of potential impact and to facilitate comparison, a matrix addressing each guideline of the BTP and relating to the plant systems, equipment, and components, is included as Section 3.1.1. The matrix has extracted all suggested guidelines from the BTP and given each an item number, 1 through
- 86. Each item has condensed a particular guideline and makes reference to the section in the BTP where that guideline can be found. The general degree of conformance to the guideline is indicated in the "Comparison" column, using codes defined as follows:
C - indicates conformance to the guideline response or conformance to its intent. Substantiating statements may be included as part of the matrix or in Section 3.1.2. (See Note 1.)
AC - indicates conformance to the guideline response by alternative means or methods. The manner of conformance is included in the matrix or discussed in Section 3.1.2 (See Note 1.)
WC - indicates that design changes, means, or methods are planned in order to conform, or conform to the intent of the guideline response. The planned design changes, means, or methods and the manner of conformance may be discussed in the matrix or in Section 3.1.2. (See Note 1.)
NC - indicates that the plant is not in conformance and no design changes are planned. The basis for nonconformance to the guideline response is included in the matrix or discussed in Section 3.1.2. (See Note 1.)
NA - indicates that the guideline is not applicable to Peach Bottom Atomic Power Station Units 2 and 3. Substantiating statements are included as part of the matrix in Section 3.1.1.
In the "Remarks" column, additional information is provided to explain or expand on the degree of conformance. Alternatively, FPP 3.1-1 REV. 21, APRIL 2017
reference may be made to Section 3.1.2 (or other sections in this report) for a more detailed discussion.
Note 1: Section 3.1.2 includes for each item the complete Appendix A guideline as it existed and the 1977 response to the guideline modified to reflect the present day plant conditions.
The item numbers in Section 3.1.2 correspond to the applicable sections of the BTP.
FPP 3.1-2 REV. 21, APRIL 2017
PBAPS FPP Section 3.1.1 DETAILED COMPARISON TO BRANCH TECHNICAL POSITION APCSB 9.5-1, APPENDIX A APCSB 9.5-1 Appendix A Item No. APCSB 9.5-1, Appendix A Guideline Item No. Comparison Remarks Overall Requirements of Fire Protection Program
- 1. Personnel A.1 AC See Section 3.1.2.
- 2. Design basis A.2 C
- 3. Backup A.3 C See Section 3.1.2.
- 4. Single failure criterion A.4 C See Section 3.1.2.
- 5. Fire suppression systems A.5 C See Section 3.1.2.
- 6. Fuel storage areas A.6 NA PBAPS is an operating plant.
- 7. Fuel loading A.7 NA PBAPS is an operating plant.
- 8. Multiple reactor sites A.8 NA PBAPS is an operating plant.
- 9. Simultaneous fires A.9 C See Section 3.1.2.
- 10. Administrative Procedures, Controls, B C See Section 3.1.2 for details.
and Fire Brigade 10.a Personnel B.1 C 10.b Bulk Storage of Combustibles B.2 C 10.c Management of Plant Conditions B.3 C 10.d Self-Sufficient Fire Fighting Activities B.4 C 10.e Organization, Training, and B.5 AC Equipping of Fire Brigades
- 11. Quality Assurance Program C C See Section 3.1.2 for details.
General Guidelines for Plant Protection Building Design
- 12. Plant layout D.1.a C
- 13. Fire hazards analysis D.1.b C
- 14. Cable spreading room D.1.c AC Cable spreading room is part of a common fire area between units. See Item Nos. 66 and 67 for further details.
- 15. Noncombustible interior components D.1.d C
- 16. Metal deck roof construction D.1.e C
- 17. Suspended ceiling construction D.1.f C
- 18. Transformers inside buildings D.1.g C
- 19. Building openings near transformers D.1.h AC See Section 3.1.2.
- 20. Floor drains D.1.i AC See Section 3.1.2.
- 21. Fire barrier ratings D.1.j AC See Section 3.1.2.
FPP 3.1-3 REV. 21, APRIL 2017
PBAPS FPP Control of Combustibles Section 3.1.1 (Cont'd)
APCSB 9.5-1 Appendix A Item No. APCSB 9.5-1, Appendix A Guideline Item No. Comparison Remarks
- 22. Separation from safety-related systems D.2.a C See Section 3.1.2.
- 23. Bulk gas storage D.2.b C
- 24. Plastics D.2.c NC See Section 3.1.2.
- 25. Flammable liquids D.2.d C See Section 3.1.2 for description of tanks.
Electric Cable Construction, Cable Trays, and Cable Penetrations
- 26. Cable tray material D.3.a C and cable penetrations
- 27. Fire protection guidelines for cable D.3.b NA See Section 3.1.2, Item Nos. 66 and rooms 67.
- 28. Automatic water sprinkler systems D.3.c C for cable trays
- 29. Cable and cable tray penetrations D.3.d AC See Section 3.2.1 and Section 3.2.1, Item Nos.
38 and 39.
- 30. Fire breaks in cable trays D.3.e C
- 31. Electrical cable and IEEE 383 D.3.f C flame test
- 32. Cable construction D.3.g C
- 33. Cable supporting structures D.3.g C should be used only for cable
- 34. cable supporting structures, D.3.i C provided with smoke venting capability
- 35. Cables in the control room D.3.j AC See Section 3.1.2, Item 35.
Ventilation
- 36. Evaluation of combustible products D.4.a C
- 37. Single failure-proof ventilation D.4.b C
- 38. Power and control for ventilation D.4.c C
- 39. Charcoal filter per Reg. Guide 1.52 D.4.d C
- 40. Air supply intakes to be located D.4.e C remote from outlets
- 41. Stairwells D.4.f C See Section 3.1.2 and Section 3.3.2, Item No. 20.
- 42. Smoke and heat vents D.4.g C
- 43. Self-contained breathing apparatus D.4.h C
- 44. Total flooding gas rooms D.4.i AC See Section 3.1.2.
Lighting and Communication
- 45. Emergency lighting and communication D.5.a, C See Section 3.1.2, Item No. 45 b, c, d and Section 3.2.2, Item No. 23 FPP 3.1-4 REV. 21, APRIL 2017
PBAPS FPP Section 3.1.1 (Cont'd)
APCSB 9.5-1 Appendix A Item No. APCSB 9.5-1, Appendix A Guideline Item No. Comparison Remarks Fire Detection and Suppression
- 46. Fire detection system E.1.a, C See Section 3.1.2 b, c, d
- 47. Installation of private fire service E.2.a C See Section 3.1.2.
- 48. Yard fire main loop E.2.b C
- 49. Fire pump design and layout E.2.c C See Section 3.1.2.
- 50. Water source reliability E.2.d C
- 51. Capacity and flowrate E.2.e C
- 52. Common water supply E.2.f C
- 53. Outdoor hoses and hydrants E.2.g AC See Section 3.1.2.
Water Sprinkler and Hose Standpipe Systems
- 54. Connections to water main E.3.a C See Section 3.1.2.
- 55. Supervision of valves E.3.b C
- 56. Sprinkler systems conformance E.3.c AC See Section 3.1.2.
- 57. Interior standpipes and hose stations E.3.d AC See Section 3.1.2.
- 58. Nozzles E.3.e AC See Section 3.3.2, Item No. 14.
- 59. Foam suppression E.3.f C
- 60. Halon suppression systems E.4 NA See Section 3.1.2, Item 60.
- 62. Portable extinguishers E.6 AC See Section 3.1.2.
Guidelines for Specific Areas
- 63. Normal operation F.1.a C
- 64. Refueling and maintenance F.1.b C
- 65. Control room F.2 AC Control room ventilation does not have smoke detection capability to alarm and 3-hour isolate rating for walls, floor, ceiling.
Halon system is not provided for floor and ceiling spaces. See Section 3.1.2 and Section 3.3.2, Item No. 25.
- 66. Cable spreading room F.3.a AC An automatic water system is not installed; however a manual CO2 system is installed. See Section 3.1.2.
- 67. Alternatives to divisional F.3.b AC Backup fixed-water system is not cable separation installed; however hose stations are located immediately outside the cable spreading room doors.
See Section 3.1.2.
FPP 3.1-5 REV. 21, APRIL 2017
PBAPS FPP Section 3.1.1 (Cont'd)
APCSB 9.5-1 Appendix A Item No. APCSB 9.5-1, Appendix A Guideline Item No. Comparison Remarks
- 68. Plant computer room F.4 NA PBAPS computers are not safety related.
See Section 3.1.2.
- 69. Switchgear rooms F.5 AC Automatic fire suppression is provided in safety-related switchgear room; not all cables are in conduit.
Barriers are 2-hour rated.
See Section 3.1.2.
- 70. Remote safety-related panels F.6 C
- 71. Station battery rooms F.7 C
- 72. Turbine lubrication and control oil F.8 AC See Section 3.1.2.
storage and use areas
- 73. Diesel generator areas F.9 AC See Section 3.1.2 and Item No. 22.
- 74. Diesel fuel oil storage areas F.10 NA See Section 3.1.2.
- 75. Safety-related pumps F.11 C See Section 3.1.2 and Item No. 62.
- 76. New fuel area F.12 AC Automatic detection is not provided for the entire area; however, two smoke detectors have been installed in the vicinity of the only safety-related equipment.
See Section 3.1.2 and Section 3.3.2, Item No. 2.
- 77. Spent fuel pool area F.13 AC See Item 76 above. See Section 3.1.2 and Section 3.3.2, Item No. 2.
- 78. Radwaste building F.14 AC Automatic detection is provided.
Fire detectors have been installed throughout the radwaste building, including the ECCS pump rooms. See Section 3.1.2 and Section 3.3.2, Item No. 1.
- 79. Decontamination areas F.15 AC All areas of the plant are provided with fire detection in accordance with the requirements of Appendix R.
See Section 3.1.2 and Section 3.3.2, Item No. 1.
- 80. Safety-related tanks F.16 C
- 81. Cooling towers F.17 C
- 82. Miscellaneous areas F.18 C Outside storage areas have been inspected to ensure adequate distance between combustible fuels such as propane fuel cylinders and adjacent diesel fuel oil storage tanks. Also the diked areas surrounding the auxiliary boiler diesel fuel oil storage and day tank complies with the NFPA Code.
FPP 3.1-6 REV. 21, APRIL 2017
PBAPS FPP Section 3.1.1 (Cont'd)
APCSB 9.5-1 Appendix A Item No. APCSB 9.5-1, Appendix A Guideline Item No. Comparison Remarks
- 83. Welding and cutting acetylene-oxygen systems G.1 C
- 84. Storage areas for dry ion exchange G.2 AC Automatic sprinkler system are not provided. Smoke and heat detectors are not provided.
See Section 3.1.2.
- 85. Hazardous chemicals G.3 C
- 86. Materials containing radioactivity G.4 C FPP 3.1-7 REV. 21, APRIL 2017
PBAPS FPP 3.1.2 Explanatory Notes for Comparison to Branch Technical Position APCSB 9.5-1 Overall Requirements of Nuclear Plant Fire Protection Program (A)
Item No. 1 - Personnel (A.1)
Responsibility for the overall fire protection program should be assigned to a designated person in the upper level of management.
This person should retain ultimate responsibility, even though formulation and assurance of program implementation is delegated.
Such delegation of authority should be to staff personnel prepared by training and experience in fire protection and nuclear plant safety to provide a balanced approach in directing the fire protection programs for nuclear power plants. The qualification requirements should be stated for the fire protection engineer or consultant who will assist in designing and selecting equipment, will inspect and test the completed physical aspects of the system, will develop the fire protection program, and assist in the fire-fighting training for the operating plant. Subsequently, the FSAR should discuss the training and the updating provisions, such as fire drills, provided for maintaining the competence of the station fire-fighting and operating crew, including personnel responsible for maintaining and inspecting the fire protection equipment.
The fire protection staff should:
(a) Coordinate building layout and systems design with fire area requirements, including consideration of potential hazards associated with postulated design basis fires.
(b) Design and maintain fire detection, suppression, and extinguishing systems.
(c) Develop fire prevention activities.
(d) Train plant personnel and the fire brigade for manual fire-fighting.
(NOTE: NFPA 6, Recommendations for Organization of Industrial Fire Loss Prevention, contains useful guidance for organization and operation of the entire fire loss prevention program.)
Response
The Vice President, PBAPS, is responsible for the overall fire protection and fire safe shutdown program for PBAPS. Program formulation and implementation are delegated to staff and line personnel within the licensees organization who are qualified by FPP 3.1-8 REV. 21, APRIL 2017
PBAPS FPP education, training, and experience for fire protection and fire safe shutdown program activities. The responsibilities contained within each organization are delineated in the administrative procedures for the PBAPS fire protection program.
Item No. 2 - Design Bases (A.2)
The overall fire protection program should be based upon evaluation of potential fire hazards throughout the plant and the effect of postulated design basis fires relative to maintaining ability to perform safety shutdown functions and minimize radioactive releases to the environment.
Response
The nature and general quantity of combustibles were considered during plant design; fire barriers and fire protection were provided as appropriate. Fire barriers are provided to satisfy the requirements of appendix R to 10 CFR 50. A fire hazards analysis is included in the Fire Protection Program.
Item No. 3 - Backup (A.3)
Total reliance should not be placed on a single automatic fire suppression system. Appropriate backup fire suppression capability should be provided.
Response
Backup fire suppression capability is provided by manual hose stations and portable fire extinguishers in areas equipped with fixed CO2 and water sprinkler fire suppression systems. The diesel generator rooms have backup fire suppression capability provided by hose attached to outside hydrants.
Item No. 4 - Single Failure Criterion (A.4)
A single failure in the fire suppression system should not impair both the primary and backup fire suppression capability. For example, redundant fire suppression water pumps with independent power supplies and controls should be provided. Postulated fires or fire protection system failures need not be considered concurrent with other plant accidents or the most severe natural phenomena.
The effect of lightning strikes should be included in the overall plant fire protection program.
FPP 3.1-9 REV. 21, APRIL 2017
Response
The fire pumps meet the single failure criterion. (See response to Guideline E.2.c, Item 49.) Sectionalizing valves in the underground fire main provide protection against the effects of a fire main break.
Lightning rods, connected to the site grounding system, are provided.
Item No. 5 - Fire Suppression Systems (A.5)
Failure or inadvertent operation of the fire suppression system should not incapacitate safety related systems or components.
Fire suppression systems that are pressurized during normal plant operation should meet the guidelines specified in Branch Technical Position APCSB 3-1, "Protection Against Postulated Piping Failures in Fluid Systems Outside Containment."
Response
In some cases, inadvertent operation of failure of a fire suppression system would incapacitate safety-related components.
For example:
- 1. Each diesel generator is provided with a manually initiated CO2 fire suppression system. A CO2 discharge signal trips associated diesel generator. The CO2 fire suppression system control devices are seismically qualified and safety related to preclude inadvertent actuation.
- 2. The Cable Spreading Room is provided with a manually initiated CO2 fire suppression system. A CO2 discharge could affect components associated with the following systems: Turbine Electro-Hydraulic Control, HPCI and RCIC. However, station procedures are in place to mitigate the potential consequences of a CO2 discharge.
In these cases, inadvertent operation of a fire suppression system would result in the loss of a safety-related component or single train safety system (e.g. HPCI). However, due to redundancy, safety-related system function availability is maintained.
The alternative Control Stations are provided with station battery-backed lights. The batteries are their chargers are protected from a fire in the control room, the cable spreading room, the computer room, or the emergency shutdown panel area.
The lights are maintained in the off position to reduce loading on the safety-related batteries during non-fire events. They are FPP 3.1-10 REV. 21, APRIL 2017
PBAPS FPP switched to the on position as part of the Alternative Shutdown procedure when required.
Information on the effects oil high-energy piping system failures outside primary containment is presented in Appendix A of the UFSAR.
Safe shutdown will be assured in accordance with the requirements of Appendix R.
Item No. 6 - Fuel Storage Areas (A.6)
The fire protection program (plans, personnel, and equipment) for buildings storing new reactor fuel and for adjacent fire zones that could affect the fuel storage zone should be fully operational before fuel is received at the site.
A schedule for implementation of modifications, if any, will be established on a case-by-case basis.
Response
This guideline is not applicable to PBAPS since it is an operating plant.
Item No. 7 - Fuel Loading (A.7)
The fire protection program for an entire reactor unit should be fully operational prior to initial fuel loading in that reactor unit.
Schedule for implementation of modifications, if any, will be established on a case-by-case basis.
Response
This guideline is not applicable to PBAPS since it is an operating plant.
Item No. 8 - Multiple-Reactor Sites (A.8)
On multiple-reactor sites where there are operating reactors and units being constructed, the fire protection program should provide continuing evaluation and include additional fire barriers, fire protection capability, and administrative controls to protect the operating units from construction fire hazards.
The superintendent of the operating plant should have the lead responsibility for site fire protection.
FPP 3.1-11 REV. 21, APRIL 2017
Response
This guideline is not applicable to PBAPS since both units are operating.
Item No. 9 - Simultaneous Fires (A.9)
Simultaneous fires in more than one reactor need not be postulated, where separation requirements are met. A fire involving more than one reactor unit need not be postulated, except for facilities shared between units.
Response
The safe shutdown analysis (see Chapter 5) is based on a fire in only one fire area. A fire involving more than one reactor unit has not been postulated except for facilities shared between units and located in the same fire area, e.g., the control room or cable spreading room. The ability to safely shut down both units in the event of a fire is provided for in the safe shutdown analysis.
Administrative Procedures, Controls, and Fire Brigade (B)
Item No. 10.a - Personnel (B.1)
Administrative procedures consistent with the need for maintaining the performance of the fire protection system and personnel in nuclear power plants should be provided.
Guidance is contained in the following publications:
- 3. NFPA 6, "industrial Fire Loss Prevention (since deleted)
- 4. NFPA 7, "Management of fire Emergencies" (since deleted)
- 5. NFPA 8, "Management Responsibility for Effects of Fire on Operations" (since deleted)
Response
Administrative procedures for maintaining the performance of the fire protection system and personnel are provided. As part of the FPP 3.1-12 REV. 21, APRIL 2017
PBAPS FPP periodic review of these procedures, the guidance contained in the NFPA publications is reviewed and incorporated into the procedures when appropriate.
More than 70 plant surveillance and operation procedures have been implemented to ensure that plant technical requirements are satisfied and that fire protection systems are maintained and used properly. The procedures can be found in the indices for ST, RT, and SO procedures.
Item No. 10.b - Bulk Storage of Combustibles (B.2)
Effective administrative measures should be implemented to prohibit bulk storage of combustible materials inside or adjacent to safety-related buildings or systems during operation or maintenance periods. Regulatory Guide 1.39, "Housekeeping Requirements for Water-Cooled Nuclear Power Plants," provides guidance on housekeeping, including the disposal of combustible materials.
Response
Combustible materials are controlled in accordance with the requirements of Appendix R to 10 CFR 50, Section III.k and applicable administrative procedure.
Item No. 10.c - Management of Plant Conditions (B.3)
Normal and abnormal conditions or other anticipated operations, such as modifications (e.g., breaking fire stops and impairment of fire detection and suppression systems) and refueling activities, should be reviewed by appropriate levels of management and appropriate special actions and procedures such as fire watches or temporary fire barriers implemented to assure adequate fire protection and reactor safety. In particular:
(a) Work involving ignition sources such as welding and flame cutting should be done under closely controlled conditions. Procedures governing such work should be reviewed and approved by persons trained and experienced in fire protection. Persons performing and directly assisting in such work should be trained and equipped to prevent and combat fires. If this is not possible, a person qualified in fire protection should directly monitor the work and function as a fire watch.
(b) Leak testing, and similar procedures such as air flow determination, should use one of the commercially available aerosol techniques. Open flames or combustion generated smoke should not be permitted.
FPP 3.1-13 REV. 21, APRIL 2017
PBAPS FPP (c) Use of combustible material, e.g., HEPA and charcoal filters, dry ion exchange resins or other combustible supplies, in safety-related areas should be controlled.
Use of wood inside buildings containing safety-related systems or equipment should be permitted only when suitable noncombustible substitutes are not available.
If wood must be used, only fire retardant treated wood (scaffolding, laydown blocks) should be permitted. Such materials should be allowed into safety-related areas only when they are to be used immediately. Their possible and probable use should be considered in the fire hazard analysis to determine the adequacy of the installed fire protection systems.
Response
- 1. Work involving the use of ignition sources or work where a potential fire hazard exists is performed in accordance with applicable administrative procedures.
These procedures specify the requirements for approval prior to starting work, fire watch considerations, special precautions, etc., and address training requirements necessary to perform hot work.
- 2. Leak testing is performed using chemically generated smoke or Freon detection.
- 3. Use and storage of combustible materials is controlled by applicable administrative procedures. Plant inspections are performed, as appropriate, by the shift supervisor and the licensees fire marshal, or by their designee. Plant policy is that only fire-retardant-treated wood be used inside the plant.
All modifications are reviewed for impact on fire protection in accordance with plant procedures. Breaches of fire barriers are controlled in accordance with plant administrative controls and the Technical Requirements Manual. Activities requiring that a fire protection system be rendered temporarily inoperable are performed in accordance with the Technical Requirements Manual requirements.
Item No. 10.d - Self-Sufficient fire Fighting Activities (B.4)
Nuclear power plants are frequently located in remote areas, at some distance from public fire departments. Also, first response fire departments are often volunteer. Public fire department response should be considered in the overall fire protection program; however, the plant should be designed to be self-FPP 3.1-14 REV. 21, APRIL 2017
PBAPS FPP sufficient for fire-fighting activities and rely on the public response only for supplemental or backup capability.
Response
The training of plant personnel, coupled with the installed and portable fire protection systems and equipment provided, is considered sufficient to extinguish or contain a fire in a given fire area. Arrangements have been made with the local public fire department to assist plant forces, if requested. Public fire department personnel have been exercised at the site and are considered capable of providing reliable supplemental and backup fire protection.
Item No. 10.e - Organization, Training, and Equipping of Fire Brigades (B.5)
The need for good organization, training, and equipping of fire brigades at nuclear power plant sites requires effective measures be implemented to assure proper discharge of these functions. The guidance in Regulatory Guide 1.101, "Emergency Planning for Nuclear Power Plants," should be followed as applicable.
(a) Successful fire fighting requires testing and maintenance of the fire protection equipment, emergency lighting, and communication, as well as practice as brigades for the people who must use the equipment. A test plan that lists the individuals and their responsibilities in connection with routine tests and inspections of the fire detection and protection systems should be developed. The test plan should contain the types, frequency, and detailed procedures for testing.
Procedures should also contain instructions on maintaining fire protection during those periods when the fire protection system is impaired or during periods of plant maintenance, e.g., fire watches or temporary hose connections to water systems.
Response to (a)
Surveillance test procedures have been instituted to ensure that fire protection systems are operable and, if found to be impaired, to ensure that appropriate compensatory measures are taken.
(Refer to response in Section B.1, Item No. 10.a.) A prefire plan, outlining fire protection strategies, has been provided.
(b) Basic training is a necessary element in effective fire-fighting operation. In order for a fire brigade to operate effectively, it must operate as a team. All members must know what their individual duties are. They FPP 3.1-15 REV. 21, APRIL 2017
PBAPS FPP must be familiar with the layout of the plant and equipment location and operation in order to permit effective fire-fighting operations during times when a particular area is filled with smoke or is insufficiently lighted. Such training can only be accomplished by conducting drills several times a year (at least quarterly) so that all members of the fire brigade have had the opportunity to train as a team, testing itself in the major areas of the plant. The drills should include the simulated use of equipment in each area and should be preplanned and post-critiqued to establish the training objective of the drills and determine how well these objectives have been met. These drills should periodically (at least annually) include local fire department participation where possible. Such drills also permit supervising personnel to evaluate the effectiveness of communications within the fire brigade and with the on-scene fire team leader, the reactor operator in the control room, and the offsite command post.
(c) To have proper coverage during all phases of operation, members of each shift crew should be trained in fire protection. Training of the plant fire brigade should be coordinated with the local fire department so that responsibilities and duties are delineated in advance.
This coordination should be part of the training course and implemented into the training of the local fire department staff. Local fire departments should be educated in operational precautions for fighting fires on nuclear power plant sites. Local fire departments should be made aware of the need for radioactive protection of personnel and the special hazards associated with a nuclear power plant site.
Response to (b) and (c)
The station fire and damage team is composed of on-shift station personnel and is directed by the shift supervisor. The team leader and team members receive periodic training in fire fighting. Fire drills are conducted quarterly. These drills include the simulated use of fire protection equipment and require post-critiquing through the use of a fire drill report form. Fire drills involving local fire department participation are not conducted; however, personnel from the local fire department are given periodic briefings on fire-fighting aspects at PBAPS. These briefings include reviews of radiation protection practices, organizational responsibilities, and plant familiarization. One of the quarterly fire brigade drills (for each shift team) may be conducted at the corporate fire school.
FPP 3.1-16 REV. 21, APRIL 2017
PBAPS FPP (d) NFPA 600, Standard on Industrial Fire Brigades, should be followed in organization, training, and fire drills.
This standard also is applicable for the inspection and maintenance of fire-fighting equipment. Among the standards referenced in this document, the following should be used: NFPA 194, "Standard for Screw Threads and Gaskets for Fire Hose Coupling," NFPA 196, "Standard for Fire Hose," NFPA 197, "Training Standard on Initial Fire Attacks," NFPA 601, "Recommended Manual of Instructions and Duties for the Plant Watchman on Guard." NFPA booklets and pamphlets listed on page 27-11 of Volume 8, 1971-72, are also applicable for good training references. In addition, courses in fire prevention and fire suppression which are recognized and/or sponsored by the fire protection industry should be used.
Response to (d)
As part of the periodic review of existing plant procedures and the generation of fire plan implementing procedures, the guidance provided in NFPA standards is reviewed and incorporated when appropriate. Fire hose and equipment at PBAPS use National Standard Thread which is compatible with local fire department equipment. Plant personnel are trained by the companys Fire Fighting School.
Item No. 11 - Quality Assurance Program (C)
Quality assurance (QA) programs of applicants and contractors should be developed and implemented to ensure that the requirements for design, procurement, installation and testing, and administrative controls for the fire protection program for safety-related areas as defined in this Branch Position are satisfied. The program should be under the management control of the QA organization. The QA program criteria that apply to the fire protection program should include the following:
- 1. Design Control and Procurement Document control Measures should be established to assure that all design related guidelines of the Branch Technical Position are included in design and procurement documents and that deviations, therefore, are controlled.
- 2. Instructions, Procedures, and Drawings Inspections, tests, administrative controls, fire drills, and training that govern the fire protection FPP 3.1-17 REV. 21, APRIL 2017
PBAPS FPP program should be prescribed by documented instructions, procedures, or drawings and should be accomplished in accordance with these documents.
- 3. Control of Purchased Material, Equipment, and Services Measures should be established to assure that purchased material, equipment, and services conform to the procurement documents.
- 4. Inspection A program for independent inspection of activities affecting fire protection should be established and executed by, or for, the organization performing the activity to verify conformance with documented installation drawings and test procedures for accomplishing the activities.
- 5. Test and Test Control A test program should be established and implemented to assure that testing is performed and verified by inspection and audit to demonstrate conformance with design and system readiness requirements. The tests should be performed in accordance with written test procedures; test results should be properly evaluated and acted on.
- 6. Inspection, Test and Operating Status Measures should be established to provide for the identification of items that have satisfactory passed required tests and inspections.
- 7. Non-Conforming Items Measures should be established to control items that do not conform to specified requirements to prevent inadvertent use or installation.
- 8. Corrective Action Measures should be established to assure that conditions adverse to fire protection, such as failures, malfunctions, deficiencies, deviations, defective components, uncontrolled combustible material and non-conformance, are promptly identified, reported, and corrected.
FPP 3.1-18 REV. 21, APRIL 2017
- 9. Records Records should be prepared and maintained to furnish evidence that the criteria enumerated above are being met for activities affecting the fire protection program.
- 10. Audits Audits should be conducted and documented to verify compliance with the fire protection program including design and procurement documents; instructions; procedures and drawings; and inspection and test activities.
Response
A QA program for Fire Protection was issued to control activities associated with the fire protection program. Each item required by Appendix A has been applied to fire protection at PBAPS.
General Guidelines for Plant Protection (D)
Building Design (d.1)
Item No. 12 - Plant Layout (D.1.a)
Plant layouts should be arranged to:
- 1. Isolate safety-related systems from unacceptable fire hazards
- 2. Separate redundant safety-related systems from each other so that both are not subject to damage from a single fire hazard Alternatives:
- a. Redundant safety-related systems that are subject to damage from a single fire hazard should be protected by a combination of fire retardant coatings and fore detection and suppression systems, or
- b. A separate system to perform the safety function should be provided.
Response
FPP 3.1-19 REV. 21, APRIL 2017
- 1. Safety-related systems are isolated from unacceptable fire hazards.
- 2. Redundant safety-related systems are separated from each other so that both are not subject to damage from a single fire. Redundant safe shutdown equipment is in compliance with the requirements of Appendix R,Section III.G and III.L.
Item No. 13 - Fire Hazards Analysis (D.1.b)
To accomplish D.1.a above, safety-related systems and fire hazards should be identified throughout the plant. Therefore, a detailed fire hazard analysis should be made. The fire hazards analysis should be reviewed and updated as necessary.
Additional fire hazards analyses should be done after any plant modification.
Response
See Chapter 4 for the fire hazards analysis and Chapter 5 for the safe shutdown analysis.
Procedures concerning modification of system designs require consideration of the impact of such modifications on fire protection. If the modification results in changes which impact the fire hazards analysis or the safe shutdown analysis (re-routing of cables from one fire area or fire zone to another, or significant increases in combustible loadings), the impact of such changes on the analyses will be evaluated. Administrative procedures require that a fire protection review checklist be completed for each modification. The checklist addresses both safe shutdown and fire protection concerns and is the vehicle by which both are evaluated for each modification.
Item No. 14 - Cable Spreading Room (D.1.c)
For multiple-reactor sites, cable spreading rooms should not be shared between reactors. Each cable spreading room should be separated from other areas of the plant by barriers (walls and floors) having a minimum fire resistance of 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />. Cabling for redundant safety divisions should be separated by walls having 3-hour fire barriers.
Alternative guidance for constructed plants is shown in Section F.3, "Cable Spreading Room."
Response
FPP 3.1-20 REV. 21, APRIL 2017
PBAPS FPP Peach Bottom is a multiple-reactor site with a shared cable spreading room for the two units. Due to the fact that certain plant equipment (diesel generators, etc.) is shared between units, it was necessary to route cables between units. When cables were routed across the centerline of the cable spreading room, they were run in tray to the room centerline and then routed to the other unit in conduit.
There are a few common control cabinets in the control room that are located on the plant centerline. In order to route cables to these cabinets, six Unit 2 tray sections were extended 5 to 10 feet across the centerline of the cable spreading room into the Unit 3 area.
In summary, the cables in tray sections crossing the cable spreading room centerline either go to a common control cabinet or leave a tray section in conduit to continue the routing to Unit 3.
None of the cables leave a tray section to go to another tray section in the other unit.
Item No. 15 - Noncombustible Interior Components (D.1.d)
Interior wall and structural components, thermal insulation materials, and radiation shielding materials and sound-proofing should be noncombustible. Interior finishes should be noncombustible or listed by a nationally recognized testing laboratory, such as Factory Mutual or Underwriters' Laboratory, Inc., for flame spread, smoke, and fuel contribution of 25 or less in its use configuration (ASTM E-84 Test), "Surface Burning Characteristics of Building Materials."
Response
Interior wall and structural components, thermal insulation materials, radiation shielding materials, sound-proofing, and interior finishes are noncombustible or have a flame spread of 25 or less.
Item No. 16 - Metal Deck Roof Construction (D.1.e)
Metal deck roof construction should be noncombustible (see the building materials directory of the Underwriters Laboratory, Inc.)
or listed as Class I by Factory Mutual System Approval Guide.
Where combustible material is used in metal deck roofing design, acceptable alternatives are (i) replace combustibles with noncombustible materials, (ii) provide an automatic sprinkler system, or (iii) provide ability to cover roof exterior and interior with adequate water volume and pressure.
Response
FPP 3.1-21 REV. 21, APRIL 2017
PBAPS FPP Metal deck roof construction complies with Factory Mutual Class I requirements.
Item No. 17 - Suspended Ceiling Construction (D.1.f)
Suspended ceilings and their supports should be of noncombustible construction. Concealed spaces should be devoid of combustibles.
Adequate fire detection and suppression systems should be provided where full implementation is not practicable.
Response
Suspended ceilings and their supports in safety-related areas are of noncombustible construction. The ceiling above the peripheral rooms in the control room provides a 1-hour fire resistance.
Also see Item 35.
Item No. 18 - Transformers Inside Buildings (D.1.g)
High voltage/high amperage transformers installed inside buildings containing safety-related systems should be of the dry type or insulated and cooled with noncombustible liquid.
Safety-related systems that are exposed to flammable oil filled transformers should be protected from the effects of a fire by:
(i) Replacing with dry transformers that are insulated and cooled with noncombustible liquid (ii) Enclosing the transformer with a 3-hour fire barrier and installing automatic water spray protection
Response
With two exceptions, all transformers located inside buildings containing safety-related systems are of the gas-filled, sealed, dry type. Two neutral ground transformers located in the turbine building at elevation 135 feet in the vicinity of the equipment hatchway are oil-filled. A wet pipe sprinkler system is provided in the area.
Item No. 19 - Building Openings Near Transformers (D.1.h)
Buildings containing safety-related systems and having openings in exterior walls closer than 50 feet to flammable oil filled transformers should be protected from the effects of a fire by:
(i) Closing the opening to have fire resistance equal to 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> FPP 3.1-22 REV. 21, APRIL 2017
PBAPS FPP (ii) Constructing a 3-hour fire barrier between the transformers and the wall openings (iii) Closing the opening and providing the capability to maintain a water curtain in case of a fire
Response
The circulating water pump and service water pump transformers (oil-filled) are located approximately 6 feet from a structure containing safety-related equipment. The wall of this structure is 3-hour fire rated and sealed as part of the penetration seal upgrade program. Several transformers are located outside the turbine building. These transformers are protected with a fixed water spray system.
Item No. 20 - Floor Drains (D.1.i)
Floor drains sized to remove expected fire-fighting water flow should be provided in those areas where fixed water fire suppression systems are installed. Drains should also be provided in other areas where hand hose lines may be used if such fire-fighting water could cause unacceptable damage to equipment in the area. Equipment should be installed on pedestals, or curbs should be provided as required to contain water and direct it to floor drains. Drains in areas containing combustible liquids should have provisions for preventing the spread of the fire throughout the drain system. Water drainage from areas which may contain radioactivity should be sampled and analyzed before discharge to the environment.
In operating plants or plants under construction, if accumulation of water from the operation of new fire suppression systems does not create unacceptable consequences, drains need not be installed.
Response
Floor drains are provided in areas equipped with fixed water fire suppression systems except as noted below. Floor drains are not provided in all areas housing safety-related equipment due to protection in the event of the probable maximum flood (PMF).
Drainage paths in these areas would be through the room doors to external drains. Drain lines from separate safeguards areas containing combustible liquids are not interconnected. The following areas are considered oil storage areas:
- 1. Lube oil storage tanks, fire zones 50-88 and 50-89, elev. 116 feet, Units 2 and 3 turbine buildings FPP 3.1-23 REV. 21, APRIL 2017
- 2. Lube oil storage room, fire zone 50-87, elev. 116 feet, Unit 3 turbine building
- 3. Lube oil reservoirs, fire zones 50-90 and 50-93, elev.
150 feet, Units 2 and 3 turbine buildings
- 4. Reactor feed pump turbine lube oil reservoirs, fire zones50-78G and 50-78F, elev. 135 feet, Units 2 and 3 turbine buildings
- 5. Reactor feed pump turbine lube oil reservoir, fire zones50-78J and 50-78K, elev. 150 feet, Units 2 and 3 turbine buildings The drain lines from inside the dikes in these areas contain normally closed valves or plugged drains. The liquid radwaste effluent is sampled prior to discharge to the environment.
Floor drains are not provided in the Switchgear and Battery Rooms.
A fire in any one of these rooms may result in the loss of the equipment in that room. However, redundant equipment or components are available in other Switchgear and Battery Rooms for safe shutdown. Accumulation of water in the affected room will not result in greater damage than that caused by the postulated fire. Accumulation of water will be limited to less than 1" in other rooms and will not result in damage since the equipment and components are mounted on either floor standing cabinets or raised off the floor by metal frames or pedestals. Water accumulation is limited to less than 1", since the doors separating the rooms are not water tight and each room has two doors that would permit water entering a room to leave by the other door and thereby prevent a significant buildup.
The floor drains in each MG Set room have been blocked (as was noted in the May 1979 Fire Protection Safety Evaluation Report, Sections 4.5 and 5.14.7). Curbing has been provided in each of the MG set rooms around each door to contain both oil and fire suppression water. The drains in the main area of the turbine building have been blocked. Water from a sprinkler discharge in the turbine hatch area sprinkler system, the 13kV pre-action system or the hydrogen seal oil unit will collect on the floor of the 116 elevation of the turbine building. Most of the water from the hydrogen seal oil unit will be collected with in the install dike. Given the large floor area of the 116 elevation the water level will remain low, below 1. In addition, water will flow under the doors of the condensate pump pit and drain to the pit itself. The water will also be able to flow out of the roll-up door opening to the exterior.
FPP 3.1-24 REV. 21, APRIL 2017
PBAPS FPP Item No. 21 - Fire Barrier Ratings (D.1.j)
Floors, walls, and ceilings enclosing separate fire areas should have a minimum fire rating of three hours. Penetrations in these fire barriers, including conduits and piping, should be sealed or closed to provide a fire resistance rating at least equal to that of the fire barrier itself. Door openings should be protected with equivalent rated doors, frames, and hardware that have been tested and approved by a nationally recognized laboratory. Such doors should be normally closed and locked or alarmed with alarm and annunciation in the control room. Penetrations for ventilation system should be protected by a standard "fire door damper" where required. (Refer to NFPA 80, "Fire Doors and Windows.")
The fire hazard in each area should be evaluated to determine barrier requirements. If barrier fire resistance cannot be made adequate, fire detection and suppression should be provided, such as:
(i) Water curtain in case of fire (ii) Flame retardant coatings (iii) Additional fire barriers
Response
Fire areas containing redundant safe shutdown components are separated from each other in accordance with the requirements of Appendix R to 10 CFR 50. (See Section 3.2, Item Nos. 37, 38, and 39.) Fire barriers identified in the 1977 PBAPS Fire Protection Program are maintained only if they meet the above criteria or have been found to significantly reduce plant fire risk, as identified by the IPEEE fire risk analysis (see reference 22).
Control of Combustibles (D.2)
Item No. 22 - Separation of Safety-Related Systems (D.2.a.)
Safety-related systems should be isolated or separated from combustible materials. When this is not possible because of the nature of the safety system or the combustible material, special protection should be provided to prevent a fire from defeating the safety system function. Such protection may involve a combination of automatic fire suppression and construction capable of withstanding and containing a fire that consumes all combustibles present. Examples of such combustible materials that may not be separable from the remainder of its system are:
- 1. Emergency diesel generator fuel oil day tanks FPP 3.1-25 REV. 21, APRIL 2017
- 2. Turbine generator oil and hydraulic control fluid systems
- 3. Reactor coolant pump lube oil system
Response
To the extent practicable, safety-related systems are separated from combustible materials or are provided with appropriate fire suppression, specifically:
- 1. The emergency diesel generator fuel oil day tanks are located in a separate enclosure inside the associated diesel generator compartment. Each diesel generator compartment is equipped with a manual CO2 fire suppression system. The diesel generator system is single failure proof (four diesels provided, three required), so that in the event of a fire occurring within an individual compartment, and assuming failure of the fire suppression system, system function is maintained.
- 2. See Response to Guideline F.8, Item No. 72.
- 3. The reactor recirculation pump lube oil systems are located within primary containment, which is inerted during normal operation.
- 4. In all cases, safe shutdown of the plant in the event of a fire is assured in accordance with the requirements of Appendix R.
Item No. 23 - Bulk Gas Storage (D.2.b)
Bulk gas storage (either compressed or cryogenic), should not be permitted inside structures housing safety related equipment.
Storage of flammable gas, such as hydrogen, should be located outdoors or in separate detached buildings so that a fire or explosion will not adversely affect any safety related systems or equipment. (Refer to NFPA 50A, "Gaseous Hydrogen Systems.")
Care should be taken to locate high pressure gas storage containers with the long axis parallel to building walls.
This will minimize the possibility of wall penetration in the event of a container failure. Use of compressed gases (especially flammable and fuel gases) inside buildings should be controlled. (Refer to NFPA 6, "Industrial Fire Loss Prevention.")
Response
FPP 3.1-26 REV. 21, APRIL 2017
PBAPS FPP The following bulk gas storage is provided inside structures housing safety-related equipment:
- 1. The liquid nitrogen storage tank for the containment atmosphere dilution (CAD) system is located in the CAD building (safety-related).
- 2. The carbon dioxide storage tank (low pressure) for the diesel generator fire suppression system is located in a structure housing the emergency service water booster pumps (safety-related).
- 3. Two carbon dioxide storage tanks for the HPCI pump rooms, cable spreading room, computer room, and control room fire suppression systems are located in the turbine building, elevation 116 feet, in the vicinity of the open hatchway.
Permanent storage of flammable gas (including hydrogen and propane) cylinders is provided in the gas storage shed adjacent to the east wall of the administration building. A permanent hydrogen tank farm exists outside of the south end of the Unit 2 turbine building, elevation 116 feet. Propane canisters, acetylene tanks are oxygen tanks are stored outdoors in the vicinity of the east wall of the administrative building. Bulk gas storage is controlled by applicable administrative procedures.
Item No. 24 - Plastics (D.2.c)
The use of plastic materials should be minimized. In particular, halogenated plastics such as polyvinyl chloride (PVC) and neoprene should be used only when substitute noncombustible materials are not available. All plastic materials, including flame and fire retardant materials, will burn with an intensity and BTU production in a range similar to that of ordinary hydrocarbons.
When burning, they produce heavy smoke that obscures visibility and can plug air filters, especially charcoal and HEPA. The halogenated plastics also release free chlorine and hydrogen chloride when burning which are toxic to humans and corrosive to equipment.
Response
The cable construction used for control and power circuits consists of cross-linked polyethylene insulation with a flame-retardant neoprene jacket. The flame test standard for cables, IEEE-383-1974, was not in effect at the time these cables were initially purchased and installed. These cables were, however, required to pass a special flame-resistance test detailed in the FPP 3.1-27 REV. 21, APRIL 2017
PBAPS FPP purchase specification. This test is essentially the oily rag test outlined in IEEE-383-1974. Therefore, the power and control cables used at Peach Bottom are capable of passing IEEE-383-1974.
Some cables are jacketed with PVC. These are cables that are used for low-level instrument signals. The cables are predominantly routed in trays dedicated to instrument cables. Less than 0.3 percent (by volume) of the cables in all the safeguard trays are jacketed with PVC.
All new cables installed at Peach Bottom are qualified to IEEE-383.
Electrical components located throughout the plant, such as control panels, relay panels, motor control centers, and power distribution panels, contain relatively small amounts of plastic in the form of terminal blocks, relay cases, circuit breaker cases, and other small items. The use of plastic in these applications is necessary because of its electrical insulating properties.
Plastic materials are also used for electrical conduit, but only when embedded within poured concrete walls and floor slabs.
Item No. 25 - Flammable Liquids (D.2.d)
Storage of flammable liquids should, as a minimum, comply with the requirements of NFPA 30, "Flammable and Combustible Liquids Code."
Response
The following tanks contain combustible liquids and meet the requirements of NFPA 30:
FPP 3.1-28 REV. 21, APRIL 2017
PBAPS FPP Tank No. Tank Description Location Fire Zone 2/3S02 Hydrogen Seal Oil Turbine Bldg.50-78B Reservoirs Elev. 116' Recirc. Pump M-G Radwaste Bldg. 4-4C Set Fluid Drive Elev. 135' 58 Unit 3 MG Set abandoned in place with oil removed Diesel Fire Pump Circ. Water 53-145 Fuel Oil Day Pump Structure Diesel Fire Pump Circ. Water 53-145 Lube Oil Reservoir Pump Structure 00T041 Diesel Fire Pump Unit 2 Circ Water 53-142 Fuel Oil Storage Pump Structure 2/3AT05 Reactor Feed Pump Turbine Bldg. 50-78G/F 2/3BT05 Pump Turbine 50/78J 2/3CT05 Reservoirs 50/78K 2/30T04 Main Turbine Turbine Bldg. 50-90 Lube Oil Storage 50-93 0AT40 Diesel Generator Diesel Gen.43-132 0BT40 Fuel Oil Day Bldg.44-133 0CT40 45-134 0DT40 46-135 0AT96 Diesel Gen. Lube Diesel Gen.43-132 0BT96 Oil Storage Bldg.44-133 0CT96 45-134 0DT96 46-135 0AT38 Diesel Fuel Oil Underground 0BT38 Storage in yard 0CT38 0DT38 00T39 Aux Boiler Diesel Aboveground Oil Day in yard 00T09 Fuel Oil Storage Aboveground in yard 2/3AT43 Clean Lube Oil Turbine Bldg. 50-88 Storage 50-89 FPP 3.1-29 REV. 21, APRIL 2017
PBAPS FPP 2/3BT43 Reclaimed Lube Oil Turbine Bldg. 50-88 Storage 50-89 Dirty Lube Oil Turbine Bldg. 50-88 Storage 50-89 00T92 Gasoline Storage Underground in yard 0AT93 Dirty Oil Storage Underground 0BT93 in yard The auxiliary boiler (No. 2 fuel oil) storage tank, 00T-009 (200, 000 gallons), and the auxiliary boiler diesel fuel oil day tank, 00T-039 (1,000 gallons) are located in the same diked area in the yard. Section 2-2.3.3 of NFPA 30-1984 requires that intermediate dikes be provided between adjacent tanks in a common area when any one tank is greater than 150 feet in diameter. Since the largest tank is only 65 feet in diameter, this requirement does not apply.
Electric Cable Construction, Cable Trays, and Cable Penetrations (D.3)
Item No. 26 - Cable Tray Material (D.3.a)
Only noncombustible materials should be used for cable tray constructions.
Response
Only noncombustible materials are used for cable tray construction.
Item No. 27 - Fire Protection Guidelines for Cable Spreading Rooms (D.3.b)
See Section F.3.a and F.3.b (Item Nos. 66 and 67) for fire protection guidelines for cable spreading rooms.
Item No. 28 - Automatic Water Sprinkler Systems for Cable Trays (D.3.c)
Automatic water sprinkler systems should be provided for cable trays outside the cable spreading room. Cables should be designed to allow wetting down with deluge water without electrical faulting. Manual hose stations and portable hand extinguishers should be provided as backup. Safety-related equipment in the vicinity of such cable trays, that does not itself require water fire protection but is subject to unacceptable damage from the FPP 3.1-30 REV. 21, APRIL 2017
PBAPS FPP sprinkler water discharge, should be protected from sprinkler system operation of malfunction.
When safety-related cables do not satisfy the provisions of Regulatory Guide 1.75, all exposed cables should be covered with an approved fire retardant coating and a fixed automatic water fire suppression system should be provided.
Response
Because the cables used at PBAPS are capable of passing the IEEE No. 383 flame test, fixed automatic water fire suppression systems are not provided for cable trays. Hose stations and portable fire extinguishers are located throughout the plant. The PBAPS separation criteria prohibit a nonsafety-related cable from being run in more than one safeguard channel tray; however, it does permit two nonsafety-related cables that have been partially routed in separate safeguard channel trays to be run in the same non-safeguard tray. With this exception, the divisional cable separation in the cable spreading room meets the guidelines of Regulatory Guide 1.75. The cables used at PBAPS are of flame retardant construction. Therefore, the cable meets the intent of this guideline.
Item No. 29 - Cable and Cable Tray Penetrations (D.3.d)
Cable and cable tray penetration of fire barriers (vertical and horizontal) should be sealed to give protection at least equivalent to that fire barrier. The design of fire barriers for horizontal and vertical cable trays should, as a minimum, meet the requirements of ASTM E-119, "Fire Test of Building Construction and Materials," including the hose stream test.
Where installed penetration seals are deficient with respect to fire resistance, these seals may be protected by covering both sides with an approved fire retardant material. The adequacy of using such material should be demonstrated by suitable testing.
Response
Penetrations are sealed in accordance with the requirements of Appendix R to 10CFR50. (See Section 3.2, Item Nos. 38 and 39 for a description of penetration seals. See Section 3.1.2, Item 21 for a discussion of which walls and floors are required to be fire barriers.)
Item No. 30 - Fire Breaks in Cable Trays (D.3.e)
Fire breaks should be provided as deemed necessary by the fire hazards analysis. Flame or flame retardant coatings may be used as FPP 3.1-31 REV. 21, APRIL 2017
PBAPS FPP a fire break for grouped electrical cables to limit spread of fire in cable ventings. (Possible cable derating owing to use of such coating materials must be considered during design.)
Response
Fire breaks are provided in vertical trays at 20-foot intervals or less. Fire breaks are not provided in horizontal trays since flame retardant cable is used. Cables are thermally sized and derated in accordance with the methods outlined in Insulated Power Cable Engineers Association (IPCEA) Standards. Power Cables installed in conduit are derated in accordance with IPCEA standard P-46-426, Power Cable Ampacities, Volume I or II. Power Cables installed in open-top cable trays are derated in accordance with ICEA standard P-54-440, Ampacities Cables in Open-top Cable Trays.
For special cases where the use of these standards is restrictive, cables are derated using a heat transfer model which considers load diversity among cables (actual loading of cables) installed in the raceway.
Item No. 31 - Electrical Cable and IEEE 383 Flame Test (D.3.f)
Electric cable constructions should, as a minimum, pass the current IEEE No. 383 flame test. (This does not imply that cables passing this test will not require additional fire protection.)
For cable installation in operating plants and plants under construction that do not meet the IEEE No. 383 flame test requirements, all cables must be covered with an approved flame retardant coating and properly derated.
Response
The power and control cables used at PBAPS are capable of passing the IEEE No. 383 flame test. (See Item No. 24)
Item No. 32 - Cable Construction (D.3.g)
To the extent practical, cable construction that does not give off corrosive gases while burning should be used. Applicable to new cable installations.
Response
All new cable is flame retardant and satisfactorily meets the requirements of IEEE Standard No. 383.
Item No. 33 - Cable Supporting Structures Should be Used Only for Cables (D.3.h)
Cable trays, raceways, conduit, trenches, or culverts should be used only for cables. Miscellaneous storage should not be permitted, nor should piping for flammable or combustible liquids FPP 3.1-32 REV. 21, APRIL 2017
PBAPS FPP or gases be installed in these areas. Installed equipment in cable tunnels or culverts need not be removed if it presents no hazard to the cable runs as determined by the fire hazards analysis.
Plant design and operating practices do not allow storage of combustibles in cable trays, raceways, conduits, trenches, or culverts. Piping for the hydrogen supply to the turbine generators is routed through the turbine building and, at certain locations, may be located in the general area of cable trays.
Item No. 34 - Cable Supporting Rooms Provided Smoke Venting Capability (D.3.i)
The design of cable tunnels, culverts, and spreading rooms should provide for automatic or manual smoke venting as required to facilitate manual fire-fighting capability.
Response
The normal ventilating system supply and exhaust fans for the cable spreading room can be utilized for smoke venting. Fire dampers will have to be manually reset to exhaust the air in the event of their closure during a fire.
Item No. 35 - Cables in the Control Room (D.3.j)
Cables in the control room should be kept to the minimum necessary for operation of the control room. All cables entering the control room should terminate there. Cables should not be installed in floor trenches or culverts in the control room.
Existing cable installed in concealed floor and ceiling spaces should be protected with an automatic total flooding Halon system.
Response
Cables which enter the control room terminate there. Some cable trays are located above the ceiling of the control room. The majority of the cables in these trays are routed to the annunciation panels. The remaining cables (three) are associated with the containment atmospheric dilution (CAD) system. All of the cables are of flame retardant construction. These trays are provided with line type heat detectors.
The control room is protected by portable fire extinguishers (CO2 and Ansul) within the control room and manual hose stations adjacent to the control room entrances. Nine Clean Agent portable fire extinguishers have been installed in the control room.
FPP 3.1-33 REV. 21, APRIL 2017
PBAPS FPP Therefore, existing fire protection in the control room is adequate in spite of the absence of a Halon system.
Ventilation (D.4)
Item No. 36 - Evaluation of Combustible Products (D.4.a)
The products of combustion that need to be removed from a specific fire area should be evaluated to determine how they will be controlled. Smoke and corrosive gases should generally be automatically discharged directly outside to a safe location.
Smoke and gases containing radioactive materials should be monitored in the fire area to determine if release to the environment is within the permissible limits of the plant Technical Specifications.
Response
Products of combustion which may contain radioactive material would be monitored by portable instrumentation in the event of fire. Area radiation monitors are also permanently installed. The operation of ventilation components and systems would be based on information from these instruments.
The purge mode of operation of the control room ventilation system discharges directly to the outside. In other areas, the normal ventilation systems would be used for smoke removal. Monitoring of ventilation system releases for compliance with Technical Specification limits is performed at the point of release to the environment.
Item No. 37 - Single Failure-Proof Ventilation (D.4.b)
Any ventilation system designed to exhaust smoke or corrosive gases should be evaluated to ensure that inadvertent operation or single failures will not violate the controlled areas of the plant design. This requirement includes containment functions for protection of the public and maintaining habitability for operations personnel.
Response
The purge mode of operation of the control room ventilation system is the only system specifically designed for smoke removal and its isolation is single failure proof in the event of a design basis accident.
Item No. 38 - Power and Control of Ventilation (D.4.c)
FPP 3.1-34 REV. 21, APRIL 2017
PBAPS FPP The power supply and controls for mechanical ventilation systems should be run outside the fire areas served by the system.
Response
The controls for the reactor building ventilation systems are located in the reactor building. The power for most of the fans is supplied from motor control centers located in the areas served. The controls for the turbine building and compartment ventilation systems are located outside the areas served; however, some power feeds originate in the areas served. The majority of the fans have sufficient spatial separation and redundancy to provide the necessary ventilation.
Item No. 39 - Charcoal Filter Per Regulatory Guide 1.52 (D.4.d)
Fire suppression systems should be installed to protect charcoal filters in accordance with Regulatory Guide 1.52, "Design Testing and Maintenance Criteria for Atmospheric Cleanup Air Filtration."
Response
The charcoal filters in each redundant train of the standby gas treatment system are provided with a manually initiated water sprinkler fire suppression system.
The charcoal filters in each redundant train of the recombiner building ventilation system are provided with automatically initiated water sprinkler fire suppression systems. The charcoal filters installed in the control room ventilation system are normally isolated and they are not protected by a fixed fire suppression system. These filters are intended for use under accident (high radiation) conditions. Hose stations and portable extinguishers are provided.
Item No. 40 - Air Supply Intakes to be Located Remote from Outlets (D.4.e)
The fresh air supply intakes to areas containing safety related equipment or systems should be located remote from the exhaust air outlets and smoke vents of other fire areas to minimize the possibility of contaminating the intake air with the products of combustion.
Response
Ventilation system intakes and exhausts are located as follows:
- 1. Reactor buildings: intake - river side elev. 216 feet exhaust - river side elev. 305 feet FPP 3.1-35 REV. 21, APRIL 2017
- 2. Radwaste buildings: intake - inshore elev. 167 feet exhaust - river side elev. 305 feet
- 3. Turbine building control room, cable spreading room, and switchgear rooms: intake - inshore elev. 167 feet exhaust - inshore elev. 195 feet Item No. 41 - Stairwells (D.4.f)
Stairwells should be designed to minimize smoke infiltration during a fire. Staircases should serve as escape routes and access routes for fire fighting. Fire exit routes should be clearly marked. Stairwells, elevators, and chutes should be enclosed in masonry towers with minimum fire rating of 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> and automatic fire doors at least equal to the enclosure construction at each opening into the building. Elevators should not be used during fire emergencies.
Where stairwells or elevators cannot be enclosed in 3-hour fire rated barriers with equivalent fire doors, escape and access routes should be established by prefire plan and practices in drills by operating and fire brigade personnel.
Response
Building exit doors are marked; lighting is provided to meet the Pennsylvania Department of Labor and Industry Fire and Panic Code requirements. Stairwells, except those which are not fire egress routes, are enclosed in a 2-hour fire rated barrier with Class B door (1.5-hour fire rating). Exterior walls are not rated. All stairwell doors except watertight doors are automatic fire doors.
Only those barriers required to separate redundant safe shutdown methods or that have been found to significantly reduce plant fire risk, as identified by the IPEEE fire risk analysis (see reference 22) have had penetrations sealed to provide equivalent fire resistance (see Item No. 21).
Item No. 42 - Smoke and Heat Vents (D.4g)
Smoke and heat vents may be useful in specific areas such as cable spreading rooms and diesel fuel oil storage areas and switchgear rooms. When natural-convection ventilation is used, a minimum ratio of 1 square foot of venting area per 200 square feet of floor area should be provided. If forced-convection ventilation is used, 300 cfm should be provided for every 200 sq. ft. of floor area. See NFPA No. 204M for additional guidance on smoke control.
Response
FPP 3.1-36 REV. 21, APRIL 2017
PBAPS FPP Power venting is provided by the normal ventilation systems.
Additionally, portable ventilation equipment in the form of smoke ejectors can be used to supplement the in-place ventilation system in order to supplement removing smoke after a fire event.
Item No. 43 - Self-Contained Breathing Apparatus (D.4.h)
Self-contained breathing apparatus, using full face positive pressure masks, approved by NIOSH (National Institute for Occupational Safety and Health - approval formerly given by the U.S. Bureau of Mines) should be provided for fire brigade, damage control, and control room personnel. Control room personnel may be furnished breathing air by a manifold system piped from a storage reservoir if practical. Service or operating life should be a minimum of one hour for the self-contained units.
At least two extra air bottles should be located on the site for each self-contained breathing unit. In addition, an onsite 6-hour supply of reserve air should be provided and arranged to permit quick and complete replenishment of exhausted supply air bottles as they are returned. If compressors are used as a source of breathing air, only units approved for breathing air should be used. Special care must be taken to locate the compressor in areas free of dust and contaminants.
Response
Self-contained breathing apparatus Scott 4.5 packs are provided for use by both fire-fighting and control room personnel. These packs are located at the main fire brigade equipment locker.
Item No. 44 - Total Flooding Gas Rooms(D.4.i)
Where total flooding gas extinguishing systems are used, area intake and exhaust ventilation dampers should close upon initiation of gas flow to maintain necessary gas concentration.
(See NFPA 12, "Carbon Dioxide Systems," and 12A "Halon 1301 Systems.")
Response
Total flooding CO2 gas extinguishing systems are used for the diesel generators (four rooms), HPCI rooms (two rooms), and the cable spreading room and computer room. Ventilation system dampers in these rooms are closed upon system initiation. Fusible link fire dampers in vents above the cable spreading room doors close at a temperature of 165F.
FPP 3.1-37 REV. 21, APRIL 2017
PBAPS FPP Lighting and Communication Item No. 45 - Emergency Lighting and Communication (D.5)
Lighting and two-way voice communication are vital to safe shutdown and emergency response in the event of fire. Suitable fixed and portable emergency lighting and communication devices should be provided to satisfy the following requirements:
(a) Fixed emergency lighting should consist of sealed beam units with individual 8-hour minimum battery power supplies.
(b) Suitable sealed beam battery-powered portable hand lights should be provided for emergency use.
(c) Fixed emergency communication should use voice powered head sets at preselected stations.
(d) Fixed repeaters installed to permit use of portable radio communication units should be protected from exposure fire damage.
Response
Response #1 Fixed self-contained, normally 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> rated, dc emergency battery lighting units are provided in all Plant areas, with the exception of the Control Room and the alternative control station (ACS) locations, where post-fire safe shutdown manual actions must be performed and in access and egress routes thereto. Fixed ac emergency lighting in the Control Room is provided by two subsystems of 8-hour, non-safety related, dedicated stationary batteries along with their associated chargers and dc to ac inverters. Fixed dc emergency lighting for the Alternative Control Stations is powered by the Stations safety related batteries.
Refer to Section 3.2, Item No. 23 and Section 5.2 for additional emergency lighting details.
Response #2 Battery-powered, halogen bulb, portable lanterns are provided for post-fire safe shutdown and emergence use.
Response #3 FPP 3.1-38 REV. 21, APRIL 2017
PBAPS FPP The communication systems available for use during fire emergencies are the Private Automatic Branch Exchange (PABX)
Telephone System, the In-Plant Radio System, and the Public Address (PA) System. These independent, two-way voice communication systems are shared between units and have been designed and installed to provide assurance that any single event will not cause a complete loss of intrasite communication. The PA, PABX, and In-Plant Radio systems utilize diverse technologies, are physically independent, spatially separated systems that are powered by non-Class IE ac and dc power sources and by Class IE ac power sources. The PA system cabinets are installed in the Cable Spreading Room; the PABX cabinets are installed in the Administration Building; and the In-Plant radio system base station repeaters and distributed antenna system combiners/receivers/splitters are installed in the Turbine Building.
A dedicated radio communication channel is provided for emergency response and post-fire safe shutdown in the event of a fire. Fire Brigade members carry a portable radio at all times while performing their normal activities during the course of their shift. Each of the portable radios has multiple radio channels, one of which is for the ACS/FIRE repeater. A fixed radio console is installed at three alternative control station (ACS) locations on Unit 2 and three ACS locations on Unit 3. The fixed, radio-linked ACS radio consoles and portable radios share the same base station repeater identified as ACS/FIRE. The ACS/FIRE radio system is a sub-system of the In-Plant radio system.
A voice/sound powered communication system (including head sets) is not provided.
See UFSAR Section 10.21 for additional communication system details.
Response #4 The In-Plant radio system base station repeaters and distributed antenna system combiners/receivers/splitters are installed in the Unit 2 Turbine Building ventilation equipment area (Room 512),
1950 elevation. A fire that originates outside the Turbine Building will not threaten the radio equipment with exposure fire damage because other plant areas are separated from the Turbine Building fire area by rated barriers. A fire that originates on the 1950 elevation of the Turbine Building will not create an exposure to the radio equipment due to the low level of combustibles (primarily fire retardant cable insulation in trays) in the area and due to no combustibles located in the immediate vicinity of the radio repeaters.
FPP 3.1-39 REV. 21, APRIL 2017
PBAPS FPP The exposure fire of concern is a turbine/generator or reactor feedwater pump bearing lube oil fire. The fire suppression systems on the bearings should control a lube oil fire. The physical distance from the turbine or feedwater pump bearings to the area where the radio equipment is located is sufficient to prevent flame impingement. It is expected that a lube oil fire will create copious amounts of smoke. The radio equipment is not located in the direct path of expected smoke and heat flow (the smoke and heat is expected to rise up to the Turbine Building roof, 21810 elevation). The immediate impact of smoke on the radio equipment is not known, but the radio equipment is expected to remain functional while the fire brigade is fighting the fire.
The installed configuration of the radio equipment is consistent with the requirement of being protected from damage due to an exposure fire.
Fire Detection and Suppression (E)
Item No. 46 - Fire Detection (E.1)
(a) Fire detection systems should, as a minimum, comply with NFPA 72D, "Standard for the Installation, Maintenance and Use of Proprietary Protective Signaling Systems."
Deviations from the requirements of NFPA 72D should be identified and justified.
(b) Fire detection system should give audible and visual alarm and annunciation in the control room. Local audible alarms should also sound at the location of the fire.
(c) Fire alarms should be distinctive and unique. They should not be capable of being confused with any other plant system alarms.
(d) Fire detection and actuation systems should be connected to the plant emergency power supply.
Response
Deviations from the requirements of NFPA 72D are as follows:
- 1. Paragraph 2-4.3 - Tests are not presently conducted at the frequencies specified.
- 2. Paragraph 4-7.2 - The fire department is not notified immediately upon receipt of a fire alarm signal.
FPP 3.1-40 REV. 21, APRIL 2017
PBAPS FPP The requirements of NFPA 72D are not wholly consistent with the design or operation of a nuclear power plant. The deviations listed above are addressed below:
- 1. Testing will be performed in compliance with technical specification requirements. The proposed technical specifications recognize the inaccessibility of certain fire protection equipment because of inerting or radiation levels.
- 2. Upon receipt of a fire alarm signal, the plant fire and damage team is dispatched to the fire location and shift supervision is informed of the extent and nature of the fire. Based on this information, a decision is made as to the need for offsite fire-fighting support.
The fire detection system alarm and annunciation panel is located in the control room. Fire alarms activate a dedicated Main Control Room annunciator horn and printer to record the event.
After acknowledging the fire alarm it will be the responsibility of the control room operator to make the appropriate public address announcement. The fire detection and actuation systems are connected to the emergency ac power buses.
Notification of the fire department may be performed either using the telephone or indirectly using the radio system to other company locations.
The H2 Water Chemistry system uses heat detectors as a backup to the leak detection system. The primary function of these heat detectors is to detect a H2 leak and shutdown the H2 Water Chemistry system, not to provide fire alarm, therefore, they are not installed in accordance with NFPA 72.
Operation of the reactor and plant systems should take precedence over fire protective service.
Fire Protection Water Supply Systems (E.2)
Item No. 47 - Installation of Private Fire Service Mains and Their Appurtenances (E.2.a)
An underground yard fire main loop should be installed to furnish anticipated fire protection water requirements. NFPA 24 -
Standard for Outside Protections, - gives necessary guidance for such installation. It references other design codes and standards developed by such organizations as the American National Standards Institute (ANSI) and the American Water Work Association (AWWA).
Lined steel or cast iron pipe should be used to reduce internal tuberculation. Such tuberculation deposits in an unlined pipe FPP 3.1-41 REV. 21, APRIL 2017
PBAPS FPP over a period of years can significantly reduce water flow through the combination of increased friction and reduced pipe diameter.
Means for treating and flushing the systems should be provided.
Approved visually indicating sectional control valves, such as post indicator valves, should be provided to isolate portions of the main for maintenance or repair without shutting off the entire system.
Visible location marking signs for underground valves is acceptable. Alternative valve position indicators should also be provided.
The fire main system piping should be separate from service or sanitary water system piping.
For operating plants, fire main system piping that can be isolated from service or sanitary water system piping is acceptable.
Response
The underground yard fire main loop conforms to the guidelines of NFPA 24 and consists of 12-inch cast iron pipe in accordance with USASI A21.6, Class 23, with a cement lining in accordance with USASI A21.4 to reduce tuberculation. Treatment of the system can be accomplished by temporarily installed piping. Flushing can be performed through fire hydrants. Sectionalizing capability is provided by post indicator valves and underground isolation valves.
The fire main system piping is separate from service and sanitary water system piping. The fire main is pressurized by the lube water system.
Some PIVs are closer than 40 feet to the protected building but are next to blank walls which will adequately separate them from a fire. Some PIVs are about 18 inches above grade but are operated by a horizontal turning of spanner wrench so the clearance will not prohibit operability. One sectional PIV is used to isolate the reactor building and auxiliary boiler building and no sectional valves are provided for isolating individual floors in the Unit 2 and 3 reactor buildings.
Item No. 48 - Yard Fire Main Loop (E.2.b)
A common yard fire main loop may serve multiunit nuclear power plant sites, if cross-connected between units. Sectional control valves should permit maintaining independence of the individual loop around each unit. For such installations, common water supplies may also be utilized. The water supply should be sized for the largest single expected flow. For multiple reactor sites FPP 3.1-42 REV. 21, APRIL 2017
PBAPS FPP with widely separated plants (approaching 1 mile or more) separate yard fire main loops should be used.
Sectionalized systems are acceptable.
Response
Sectionalizing valves in the fire system piping provide the capability of maintaining system operability with portions out of service. See PBAPS Drawing M-318, Sheets 1 through 10, for the fire protection system piping and instrumentation diagrams.
Item No. 49 - Fire Pump Design and Layout (E.2.c)
If pumps are required to meet system pressure or flow requirements, a sufficient number of pumps should be provided so that 100 percent capacity will be available with one pump inactive (e.g., three 50 percent pumps or two 100 percent pumps). The connection to the yard fire main loop from each fire pump should be widely separated, preferably located on opposite sides of the plant. Each pump should have its own driver with independent power supplies and control. At least one pump (if not powered from the emergency diesels) should be driven by nonelectrical means, preferably diesel engine. Pumps and drivers should be located in rooms separated from the remaining pumps and equipment by a minimum 3-hour fire wall. Alarms indicating pump running, driver availability, or failure to start should be provided in the control room.
Details of the fire pump installation should as a minimum conform to NFPA 20, "Standard for the Installation of Centrifugal Fire Pumps.
Response
The source of water for fire protection is Conowingo Pond. The fire pumps are located in the intake structure in separate seismic Class I rooms and are separated by walls which provide fire resistance commensurate with combustible loading in the rooms.
The fire pumping equipment consists of two 100 percent 2,500 gpm pumps. One pump is electric motor driven (powered from an emergency bus); the other pump is driven by a diesel engine.
Power supplies and controls for each pumps are independent.
Control room alarm displays for the diesel-driven pump are: engine running, control switch other than "auto" position, engine trouble (low lube oil pressure, high engine temperature, engine failed to start, overspeed shutdown). Control room alarm displays for the electric motor driven pump are: motor running, motor automatic start, ac power not available, motor not in automatic. Separate supply lines to the yard fire main loop are provided from each FPP 3.1-43 REV. 21, APRIL 2017
PBAPS FPP pump. The connection points are approximately 10 feet apart with an isolation valve between. The fire pump installation conforms to NFPA 20.
A local indication pressure gauge is installed on the fire pump discharges. A relief valve was not required on the discharge of the electric motor driven fire water pump because the piping is rated for greater than the maximum pump discharge pressure, but one has been installed by Mod 5007. A relief valve conforming to NFPA 20 requirements is provided on the discharge of the diesel driven pump. Suction pressure alarms are not provided since the Conowingo Pond is not a stored water supply.
Item No. 50 - Water Source Reliability (E.2.d)
Two separate reliable water supplies should be provided. If tanks are used, two 100 percent (minimum of 300,000 gallons each) system capacity tanks should be installed. They should be interconnected so that pumps can take suction from either or both. However, a leak in one tank or its piping should not cause both tanks to drain. The main plant fire protection water supply capacity should be capable of refilling either tank in a minimum of 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
Common tanks are permitted for fire protection and sanitary or service water storage. When this is done, however, minimum fire protection water storage requirements should be dedicated by means of a vertical standpipe for other water services.
Response
The fire pumps take suction from independent, isolatable intake wells. The water source is Conowingo Pond. The guidelines for tanks are not applicable to PBAPS since storage tanks are not installed.
Item No. 51 - Capacity and Flowrate (E.2.e)
The fire protection water supply (total capacity and flow rate) should be calculated on the basis of the largest expected flow rate for a period of two hours, but not less than 300,000 gallons.
This flow rate should be based (conservatively) on 500 gpm for manual hose streams plus the greater of:
- 1. All sprinkler heads opened and flowing in the largest designed fire areas; or
- 2. The largest open head deluge system(s) operating.
FPP 3.1-44 REV. 21, APRIL 2017
Response
The fire pumps are rated at 2,500 gpm at 125 psi and are capable of supplying water at the required pressure for the largest sprinkler flow plus 500 gpm.
Item No. 52 - Common Water Supply (E.2.f)
Lakes or freshwater ponds of sufficient size may qualify as sole source of water for fire protection, but require at least two intakes to the pump supply. When a common water supply is permitted for fire protection and the ultimate heat sink, the following conditions should also be satisfied:
- 1. The additional fire protection water requirements are designed into the total storage capacity; and
- 2. Failure of the fire protection system should not degrade the function of the ultimate heat sink.
Response
The fire pumps take suction from independent, isolatable intake wells. The water source is Conowingo Pond. The high pressure service water pumps (RHR heat exchanger cooling) take suction from the same intake well as the fire pumps. Since the fire pumps take suction from independent, isolatable, intake wells, and there is no stored water supply, there is no need for level alarms for the suction of the fire pumps. Water levels of the river and pond are monitored.
Item No. 53 - Outdoor Hoses and Hydrants (E.2.g)
Outside manual hose installations should be sufficient to reach any location with an effective hose stream. To accomplish this, hydrants should be installed approximately every 250 feet on the yard main system. The lateral to each hydrant from the yard main should be controlled by a visually indicating or key operated (curb) valve. A hose house, equipped with hose and combination nozzle, and other auxiliary equipment recommended in NFPA 24, "Outside Protection," should be provided as needed but at least ever 1,000 feet.
Threads compatible with those used by local fire departments should be provided on all hydrants, hose couplings, and standpipe risers.
FPP 3.1-45 REV. 21, APRIL 2017
Response
Hydrants with curb valves are installed, in general, at design intervals of approximately 250 feet with a 290-foot maximum. Fire hydrant H-8 was removed in 1971 to accommodate installation of the condensate storage tank. The distance between the two hydrants on either side of hydrant H-8's former location is 430 feet. An analysis performed in 1982 indicated that 300-foot sections of hose from the two existing hydrants provide coverage for the area previously protected by hydrant H-8 except for the area northeast of the access road which contains no equipment or structures and is not used for storage. Since there are no combustibles or ignition sources in this area the probability of a fire is extremely remote. MOD P00248 moved hydrant H-9 such that the distance between hydrant H-7 and H-9 is less than 430 ft. This analysis is still bounding. All hydrants were inspected for 18 inches of clearance. The area around two hydrants is less than the specified clearance. These hydrants can still be operated by removing the hose cap one-quarter turn with a wrench and the rest by hand. One hydrant is located within 40 feet of a building; however, the building has blank concrete walls which will not be a source of smoke or heat and are not likely to fall. Four hose houses (with NFPA 24 recommended equipment) are provided (1,150-foot maximum spacing). Hydrant threads are National Standard and are compatible with local fire department equipment.
Water Sprinklers and Hose Standpipe Systems (E.3)
Item No. 54 - Connections to Water Mains (E.3.a)
Each automatic sprinkler system and manual hose station standpipe should have an independent connection to the plant underground water main. Headers fed from each end are permitted inside buildings to supply multiple sprinkler and standpipe systems.
When provided, such headers are considered an extension of the yard main system. The header arrangement should be such that no single failure can impair both the primary and backup fire protection systems.
Each sprinkler and standpipe system should be equipped with OS&Y (outside screw and yoke) gate valve, or other approved shutoff valve, and water flow alarm. Safety-related equipment that does not itself require sprinkler water fire protection, but is subject to unacceptable damage if wetted by sprinkler water discharge should be protected by water shields or baffles.
FPP 3.1-46 REV. 21, APRIL 2017
Response
Separate interior headers are not provided within the plant for fixed water extinguishing systems and manual hose stations.
However, the main headers are fed from both ends and cross connections are provided, thus satisfying the requirement for Appendix A to BTP 9.5-1 for combined systems.
Shutoff valves (175 lb, Underwriters Pattern) are provided for each sprinkler system. Flow alarms or supervised valves are provided in the sprinkler lines but not in the manual hose station standpipes.
Item No. 55 - Supervision of Valves (E.3.b)
All valves in the fire protection water systems should be electrically supervised. The electrical supervision signal should indicate in the control room and other appropriate command locations in the plant (see NFPA 26, "Supervision of Valves").
When electrical supervision of fire protection valves is not practicable, an adequate management supervision program should be provided. Such a program should include locking valves open with strict key control; tamper proof seals; and periodic, visual check of all valves.
Response
The method of supervision of fire protection valves is described in Chapter 2.
Item No. 56 - Sprinkler Systems Conformance to Standards (E.3.c)
Automatic sprinkler systems should as a minimum conform to requirements of appropriate standards such as NFPA 13, "Standard for the Installation of Sprinkler Systems," and NFPA 15, "Standard for Water Spray Fixed Systems.
Response
Automatic sprinkler systems generally conform to the requirements of NFPA 13 and 15. Minor deviations have been addressed separately. Dikes of 3.5-inch height with two sumps have been provided to contain oil from each turbine building lube oil tank area (rooms 139 and 179). The floor drains in room 105 have been plugged as requested by the NRC in the SER (See Section 3.3).
FPP 3.1-47 REV. 21, APRIL 2017
PBAPS FPP Item No. 57 - Interior Standpipes and Hose Stations (E.3.d)
Interior manual hose installation should be able to reach any location with at least one effective hose steam. To accomplish this, standpipes with hose connections equipped with a maximum of 75 feet of 1.5-inch woven jacket, lined fire hose and suitable nozzles should be provided in all buildings, including containment, on all floors and should be spaced at not more than 100-foot intervals. Individual standpipes should be at least 4 inches in diameter for multiple hose connections and 2.5 inches in diameter for single hose connections. These systems should follow the requirements of NFPA No. 14 for sizing, spacing, and pipe support requirements (NELPIA).
Hose stations should be located outside entrances to normally unoccupied areas and inside normally occupied areas. Standpipes serving hose stations in areas housing safety-related equipment should have shutoff valve and pressure-reducing devised (if applicable) outside the area.
Response
Standpipes for interior manual hose stations are placed so that all portions on each elevation (except primary containment) are within 30 feet of a nozzle attached to 100 feet of hose (NFPA 14).
In each of the RHR rooms, a fire hose from elevation 116 feet can be used to reach the lower elevation of the room with an effective hose stream by directing the hose stream downward through the grating at elevation 116 feet. Water from the hose will cool the room and control the fire. Final fire extinguishment may be accomplished with portable extinguishers. Hose stations are equipped with 100 feet of woven jacket, rubber-lined hose.
Standpipes are 3 inches in diameter for one or two hose station connections and 4 inches in diameter for three or more hose station connections. The following exceptions have been verified by a hydraulic simulation:
- Hose reels HR-88-5, HR-135-57, and HR-135-54 each have 21/2 inch diameter feeder piping.
- Hose reels HR-116-60, HR-135-65, and HR-165-77 share the same 3 inch diameter feeder piping.
A 3.5 -inch pressure gauge is not provided at the top of each standpipes; however, in all cases except two, the interconnected standpipes have an adjacent standpipe of equal or greater height which has an installed pressure gauge near the top with no intervening gauges by valves which are normally locked open allowing pressure to be monitored at other pressure gauges.
FPP 3.1-48 REV. 21, APRIL 2017
PBAPS FPP Item No. 58 - Nozzles (E.3.e)
The proper type of hose nozzles to be supplied to each area should be based on the fire hazard analysis. The usual combination spray/straight-stream nozzle may cause unacceptable mechanical damage (for example, the delicate electronic equipment in the control room) and be unsuitable. Electrically safe nozzles should be provided at locations where electrical equipment or cabling is located.
Response
Hose stations nozzles are of the adjustable-spray straight-stream type. Hose stations are not provided in the control room.
Item No. 59 - foam Suppression (E.3.f)
Certain fires, such as those involving flammable liquids, respond well to foam suppression. Consideration should be given to use of any of the available foams for such specialized protection application. These include the more common chemical mechanical low expansion foams, high expansion foam, and re relatively new aqueous film forming foam (AFFF).
Response
Foam suppressions provided for the auxiliary boiler fuel oil storage tank. A portable foam nozzle with pickup tube and 5-gallon containers of foam are available to the fire brigade.
Item No. 60 - Halon Suppression Systems (E.4)
The use of Halon fire extinguishing agents should as a minimum comply with the requirements of NFPA 12A and 12B, "Halogenated fire Extinguishing Agent Systems - Halon 1301 and Halon 1211."
Only UL or FM approved agents should be used.
In addition to compliance with the guidelines of NFPA 12A and 12B, preventive maintenance and testing of the systems, including check weighing of the Halon cylinders, should be done at least quarterly.
Particular consideration should also be given to:
(a) Minimum required Halon concentration and soak time (b) Toxicity of Halon FPP 3.1-49 REV. 21, APRIL 2017
PBAPS FPP (c) Toxicity and corrosive characteristics of thermal decomposition products of Halon
Response
Halon suppression systems are not provided in safety-related areas at PBAPS.
Item No. 61 - Carbon Dioxide Suppression Systems (E.5)
The use of carbon dioxide extinguishing systems should as a minimum comply with the requirements of NFPA 12, "Carbon Dioxide Extinguishing Systems."
Particularly consideration should also be given to:
(a) Minimum required CO2 concentration and soak time (b) Toxicity of CO2 (c) Possibility of secondary thermal shock (cooling) damage (d) Offsetting requirements for venting during CO2 injection to prevent over pressurization versus sealing to prevent loss of agent (e) Design requirements from over pressurization (f) Possibility of probability of CO2 systems being out of service because of personnel safety consideration. CO2 systems are disarmed whenever people are present in an area so protected. Areas entered frequently (even though duration time for any visit is short) have often been found with CO2 systems shut off.
Response
The CO2 suppression systems comply with the requirements of NFPA 12.
(a) System discharge tests were performed prior to unit startup. CO2 concentrations were acceptable.
(b) A manually initiated system is provided in the computer room and both the Unit 2 and Unit 3 HPCI Rooms.
Automatically initiated systems with predischarge alarms are provided for HPCI rooms. These systems alarm in the control room when the system is disarmed. Manually initiated systems with pre-discharge alarms are provided for the diesel generator rooms and Cable Spreading Room.
FPP 3.1-50 REV. 21, APRIL 2017
PBAPS FPP (c) An evaluation of the cable spreading room CO2 system was made that has determined components associated with the following systems could be affected by thermal shock:
Turbine Electro-Hydraulic Control, HPCI and RCIC.
However, the discharge of the CO2 system into the cable spreading room will not have a significant affect on the ability to safely shut down the plant. In the extreme, the effects of the discharge are no worse than the effects of a fire which assumes loss of all equipment in the room. Station procedures are in place to mitigate the potential consequences of a CO2 discharge.
(d) See item (a) above.
(e) See item (a) above.
(f) See item (b) above.
Item No. 62 - Portable Extinguishers (E.6)
Fire extinguishers should be provided in accordance with guidelines of NFPA 10 and 10A, "Portable Fire Extinguishers, Installation, Maintenance, and Use." Dry chemical extinguishers should be installed with due consideration given to cleanup problems after use and possible adverse effects on equipment installed in the area.
Response
Portable fire extinguishers are installed and maintained in accordance with NFPA 10. Refer to Section 3.3 for information on the type of fire extinguishers provided for each area.
Fire extinguisher maintenance consists of visual inspections for all extinguishers. In addition, for chemical extinguishers, cartridges are weighed periodically and lids are removed to verify the presence of chemicals. Carbon dioxide extinguishers are also weighed periodically to verify that adequate quantity of extinguishing agent exists.
Guidelines for Specific Plant Areas (F)
Item No. 63 - Normal Operation (F.1.a)
Fire protection requirements for the primary and secondary containment areas should be provided on the basis of specific identified hazards. For example:
FPP 3.1-51 REV. 21, APRIL 2017
- Lubricating oil or hydraulic fluid system for the primary coolant pumps
- Cable tray arrangements and cable penetrations
- Charcoal filters Because of the general inaccessibility of these areas during normal plant operations, protection should be provided by automatic fixed systems. Automatic sprinklers should be installed for those hazards identified as requiring fixed suppression.
Fire suppression systems should be provided based on the fire hazards analysis.
Fixed fire suppression capability should be provided for hazards that could jeopardize safe plant shutdown. Automatic sprinklers are preferred. An acceptable alternative is automatic gas (Halon or CO2) for hazards identified as requiring fixed suppression protection.
Operation of the fire protection systems should not compromise integrity of the containment or the other safety-related systems.
Fire protection activities in the containment areas should function in conjunction with total containment requirements such as control of contaminated liquid and gaseous release and ventilation.
An enclosure may be required to confine the agent if a gas system is used. Such enclosures should not adversely affect safe shutdown, or other operating equipment in the containment.
Fire detection systems should alarm and annunciate in the control room. The type of detection used and the location of the detectors should be most suitable to the particular type of fire that could be expected from the identified hazard. A primary containment general area fire detection capability should be provided as backup for the above described hazard detection. To accomplish this, suitable smoke detection (e.g., visual obscuration, light scattering, and particle counting) should be installed in the air recirculation system ahead of any filters.
Automatic fire suppression capability need not be provided in the primary containment atmospheres that are inerted during normal operation. However, special fire protection requirements during refueling and maintenance operations should be satisfied as provided below.
Response
FPP 3.1-52 REV. 21, APRIL 2017
PBAPS FPP The primary containment at PBAPS is inerted during normal operation. Three general area smoke detectors which alarm in the control room are provided. Smoke detectors are not provided in the air recirculation system.
Item No. 64 - Refueling and Maintenance (F.1.b)
Refueling and maintenance operations in containment may introduce additional hazards such as contamination control materials, decontamination supplies, wood planking, temporary wiring, welding, and flame cutting (with portable compressed fuel gas supply). Possible fires would not necessarily be in the vicinity of fixed detection and suppression systems.
Management procedures and controls necessary to assure adequate fire protection are discussed in Section 3a.
In addition, manual fire-fighting capability should be permanently installed in containment. Standpipes with hose stations and portable fire extinguishers should be installed at strategic locations throughout containment for any required manual fire-fighting operations.
Equivalent protection from portable systems should be provided if it is impractical to install standpipes with hose stations.
Adequate self-contained breathing apparatus should be provided near the containment entrances for fire-fighting and damage control personnel. These units should be independent of any breathing apparatus or air supply systems provided for general plant activities.
Response
Standpipes, hose stations, and portable fire extinguishers are provided in secondary containment. Permanently installed fire suppression equipment is not provided inside primary containment.
Work involving the use of ignition sources within primary containment and elsewhere in the plant is controlled by applicable administrative procedures, which require consideration of fire protection provisions.
Self-contained breathing apparatus is located at certain entrances to secondary containment and is dedicated to fire protection or emergency activities.
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PBAPS FPP Item No. 65 - Control Room (F.2)
The control room is essential to safe reactor operation. It must be protected against disabling fire damage and should be separated from other areas of the plant by floors, walls, and roofs having minimum fire resistance ratings of 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.
Control room cabinets and consoles are subject to damage from two distinct fire hazards:
(a) Fire originating within a cabinet or console (b) Exposure fire involving combustibles in the general room area Manual fire-fighting capability should be provided for both hazards. Hose stations and portable water and Halon extinguishers should be located in the control room to eliminate the need for operators to leave the control room. An additional hose piping shutoff valve and pressure reducing device should be installed outside the control room.
Hose stations adjacent to the control room with portable extinguishers in the control room are acceptable.
Nozzles that are compatible with the hazards and equipment in the control room should be provided for the manual hose station. The nozzles chosen should satisfy actual fire-fighting needs, satisfy electrical safety, and minimize physical damage to electrical equipment from hose stream impingement.
Fire detection in the control room cabinets and consoles should be provided by smoke and heat detectors in each fire area. Alarm and annunciation should be provided in the control room. Fire alarms in other parts of the plant should also be alarmed and annunciated in the control room.
Breathing apparatus for control room operators should be readily available. Control room floors, ceiling, supporting structures, and walls, including penetrations and doors, should be designed to a minimum fire rating of 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />. All penetration seals should be air tight.
The control room ventilation intake should be provided with smoke detection capability to automatically alarm locally and isolate the control room ventilation system to protect operators by preventing smoke from entering the control room. Manually operated venting of the control room should be available so that operators have the option of venting for visibility.
FPP 3.1-54 REV. 21, APRIL 2017
PBAPS FPP Manually operated ventilation systems are acceptable.
Cables should not be located in concealed floor and ceiling spaces. All cables that enter the control room should terminate in the control room. That is, no cabling should be simply routed through the control room from one area to another.
If such concealed spaces are used, however, they should have fixed automatic total flooding Halon protection.
Response
Fire suppression capability in the control room is provided by:
- 1. Portable fire extinguishers within the control room
- 2. Manual hose stations adjacent to the control room entrances Four smoke detectors are provided in the control room. The fire alarm system annunciation panel is located in the control room.
Self-contained breathing apparatus is provided at the entrances to the control room. The control room ventilation system has a manually initiated purge mode. The ventilation system can be manually shut down. Early warning fire detectors are provided in all enclosed rooms in the control room as well as above the control room. Openings in the walls separating the main control room from the enclosed rooms have been closed and doors provided with self-closing mechanisms. The control room floor penetrations were not sealed to provide 3-hour fire resistance. Penetrations through the floor were sealed to provide a hot gas and smoke barrier. The false ceiling of the enclosed rooms is a 1-hour fire barrier. In the event of a fire in the control room, alternative shutdown panels outside the control room will allow the plant to be safely shutdown.
Item No. 66 - Cable Spreading Room (F.3)
The preferred acceptable methods are:
- 1. Automatic water system such as closed-head sprinklers, open-head deluge, or open directional spray nozzles.
Deluge and open spray systems should have provisions for manual operation at a remote station; however, there should also be provisions to preclude inadvertent operation. Location of sprinkler heads or spray nozzles should consider cable tray sizing and arrangements to assure adequate water coverage. Cables should be designed to allow wetting down with deluge water without FPP 3.1-55 REV. 21, APRIL 2017
PBAPS FPP electrical faulting. Open-head deluge and open directional spray systems should be zoned so that a single failure will not deprive the entire area of automatic fire suppression capability. The use of foam is acceptable, provided it is of a type capable of being delivered by a sprinkler or deluge system, such as an aqueous film forming foam (AFFF).
- 2. Manual hoses and portable extinguishers should be provided as backup.
- 3. Each cable spreading room of each unit should have divisional cable separation, and be separated from the other and the rest of the plant by a minimum 3-hour rated fire wall (refer to NFPA 251 or ASTM E-119 for fire test resistance rating).
- 4. At least two remote and separate entrances are provided to the room for access by fire brigade personnel; and
- 5. Aisle separation provided between tray stacks should be at least 3 feet wide and 8 feet high.
Response
Fire protection in the cable spreading room is provided by:
- 1. Smoke detectors that alarm locally and in the control room
- 2. A manually initiated fixed CO2 system supplied by two 6-ton storage tanks
- 3. Hose stations located adjacent to the two separate entrances to the room, each equipped with variable gallonage fog nozzles with a ball type shutoff
- 4. Portable fire extinguishers located within the room Additional design features incorporated in the cable spreading room are:
- 1. All cable trays are located at least 6 feet above the floor negating the requirement for aisle separation.
- 2. The cables are capable of passing the IEEE No. 383 flame test negating the requirement for a fire retardant coating. (Refer to Item Nos. 24 and 31.)
FPP 3.1-56 REV. 21, APRIL 2017
- 3. The PBAPS separation criterion prohibits a nonsafety-related cable from being run in more than one safeguards channel tray; however it does permit two nonsafety-related cables that have been partially routed in separate safeguards channel tray to be run in the same non-safeguards tray. With this exception, the divisional cable separation in the cable spreading room meets the guidelines of Regulatory Guide 1.75.
Item No. 67 - Alternatives to Divisional Cable Separation (F.3.b)
For cable spreading rooms that do not provide divisional cable separation of a(3), in addition to meeting a(1), (2), (4), and (5) above, the following should also be provided:
- 1. Divisional cable separation should meet the guidelines of Regulatory Guide 1.75, "Physical Independence of Electrical Systems."
- 2. All cabling should be covered with a suitable fire retardant coating.
- 3. As an alternative to a(1) above, automatically initiated gas systems (Halon or CO2) may be used for primary fire suppression, provided a fixed water system is used as a backup.
- 4. For plants that cannot meet the guidelines of Regulatory Guide 1.75, in addition to meeting a(1), (2), (4), and (5) above, an auxiliary shutdown system with all cabling independent of the cable spreading room should be provided.
Response
PBAPS does not meet preferred acceptable methods 1 and 3; however, meeting the intent of the guidelines of Regulatory Guide 1.75 along with the use of flame retardant cable construction provides an acceptable alternative to preferred method 3.
The fixed CO2 suppression system is manually initiated. The two hose stations and portable fire extinguishers are provided as a backup. The CO2 system along with the detection and manual backup is considered sufficient and has been accepted by the NRC.
Item No. 68 - Plant Computer Room (F.4)
Safety-related computers should be separated from other areas of the plant by barriers having a minimum 3-hour fire resistant rating. Automatic fire detection should be provided to alarm and FPP 3.1-57 REV. 21, APRIL 2017
PBAPS FPP annunciate in the control room and alarm locally. Manual hose stations and portable water and Halon fire extinguishers should be provided.
Response
The PBAPS computers are not safety-related. The computers are located in a room inside the cable spreading room. Smoke detectors which alarm locally and in the control room are provided. A manually initiated CO2 fire suppression system is provided. Manual hose stations are provided external to the cable spreading room. Portable CO2 fire extinguishers are provided inside the computer room. In the event of a fire in this area, the plant can be safely shut down through use of the alternative shutdown capability. The block wall between the two rooms is 2-hour rated.
Since the walls are not required to separate redundant safe shutdown methods, adequate protection is provided. Refer to Chapter 5, fire area 25.
Item No. 69 - Switchgear Rooms (F.5)
Switchgear rooms should be separated from the remainder of the plant by minimum 3-hour rated fire barriers to the extent practicable. Automatic fire detection should alarm and annunciate in the control room and alarm locally. Fire hose stations and portable extinguishers should be readily available.
Acceptable protection for cables that pass through the switchgear room is automatic water or gas agent suppression. Such automatic suppression must consider preventing unacceptable damage to electrical equipment and possible necessary containment of agent following discharge.
Response
Safety-related switchgear is separated from the remainder of the plant by 2-hour and 3-hour fire rated barriers. Refer to Section 3.2.2, Item Nos. 37, 38, and 39 for a discussion of the acceptability of these barriers. An automatic fire detection and suppression system using a double interlock pre-action design which alarms locally and in the control room is provided in each safety-related switchgear room. Hose stations are provided adjacent to the rooms, and portable fire extinguishers are provided within the rooms. Most cable that passes through a switchgear room is installed in conduit; however, there are numerous cable trays in the rooms. Combustible material in the area consists primarily of electrical cable insulation. Given the automatic fire detection and suppression in the switchgear rooms, the exposed cable jacketing does not have a significant impact on the fire protection.
FPP 3.1-58 REV. 21, APRIL 2017
PBAPS FPP In accordance with 10 CFR 50 Appendix R, Section III.G.2, redundant cables and equipment and associated nonsafety circuits located in the 13.8 kV switchgear rooms having 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> fire rating enclosures are protected by fire detectors and automatic fire suppression systems in the fire area.
Item No. 70 - Remote Safety Related Panels (F.6)
The general area housing remote safety-related panels should be provided with automatic fire detectors that alarm locally and alarm and annunciate in the control room. Combustible materials should be controlled and limited to those required for operation.
Portable extinguishers and manual hose stations should be provided.
Response
The remote shutdown panels for both units are located on elevation 165 feet in the radwaste building at column line H, fire zones 25-108A (behind rolling steel grills 340 and 341). General area smoke detectors, which alarm locally and in the control room, are provided. Line type heat detectors are provided in all cable trays in this area. An automatic sprinkler system is provided. A hose station and portable fire extinguishers are provided.
Item No. 71 - Station Battery Rooms (F.7)
Battery rooms should be protected against fire explosions.
Battery rooms should be separated from each other and other areas of the plant by barriers having a minimum fire rating of 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> inclusive of all penetrations and openings. (See NFPA 69, "Standard on Explosion Prevention Systems.") Ventilating systems in the battery rooms should be capable of maintaining the hydrogen concentration well below 2 vol. % hydrogen concentration.
Standpipe and hose and portable extinguishers should be provided.
Alternatives:
(a) Provide a total fire rated barrier enclosure of the battery room complex that exceeds the fire load contained in the room.
(b) Reduce the fire load to be within the fire barrier capability of 1-1/2 hours.
OR FPP 3.1-59 REV. 21, APRIL 2017
PBAPS FPP (c) Provide a remote manually actuated sprinkler system in each room and provide the 1-1/2 hour fire barrier separation.
Response
Rooms housing safety-related batteries are separated from each other and the remainder of the plant by 2-hour and 3-hour fire rate barriers. Refer to Section 3.2.2, Item Nos. 37, 38, and 39 for a discussion of the acceptability of these barriers. An automatic fire detection and suppression system using a double interlock pre-action design is provided. In addition, hose stations and portable extinguishers are provided. Ventilation is provided to maintain hydrogen concentrations well below 2 percent by volume of hydrogen in air. The barrier ratings are in excess of those needed for the fixed combustible loading in the rooms.
Item No. 72 - Turbine Lubrication and Control Oil Storage and Use Areas (F.8)
A blank fire wall having a minimum resistance rating of 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> should separate all areas containing safety-related systems and equipment from the turbine oil system.
When a blank wall is not present, open-head deluge protection should be provided for the turbine oil hazards and automatic open-head water-curtain protection should be provided for wall openings.
Response
The turbine lubricating oil storage tanks and the EHC system reservoir and pumps are located in rooms within the turbine building (nonsafety-related structure). These rooms are separated from the remainder of the building by 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> fire rated barriers.
Each room is protected by a wet pipe sprinkler system. The construction of the walls surrounding oil areas is heavily reinforced concrete. The boundary doors are A-label (3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />) doors. The main wall between the lube oil storage area and the moisture separator area is a radiation shield wall with few penetrations. The wet pipe sprinkler system was modified to provide protection for an opening above the door between the Lube Oil Storage Room and the Moisture Separator Area.
Item No. 73 - Diesel Generator Areas (F.9)
Diesel generators should be separated from each other and other areas of the plant by fire barriers having a minimum fire resistance rating of 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.
FPP 3.1-60 REV. 21, APRIL 2017
PBAPS FPP Automatic fire suppression such as AFFF or sprinklers should be installed to combat any diesel generator or lubricating oil fires.
Automatic fire detection should be provided to alarm and annunciate in the control room and alarm locally. Drainage for fire-fighting water and means for local manual venting of smoke should be provided.
Day tanks with total capacity up to 1,100 gallons are permitted in the diesel generator area under the following conditions:
(a) The day tank is located in a separate enclosure, with a minimum fire resistance rating of 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />, including doors or penetrations. These enclosures should be capable of containing the entire contents of the day tanks. The enclosure should be ventilated to avoid accumulation of oil fumes.
(b) The enclosure should be protected by automatic fire suppression systems such as AFFF or sprinklers.
When day tanks cannot be separated from the diesel generator, one of the following should be provided for the diesel generator area:
(a) Automatic open-head deluge or open-head spray nozzle system(s)
(b) Automatic closed-head sprinklers (c) Automatic AFFF that is delivered by a sprinkler deluge or spray system (d) Automatic gas system (Halon or CO2) may be used in lieu of foam or sprinklers to combat diesel generator and/or lubricating oil fires.
Response
The individual diesel generators are separated from each other by 3-hour fire rated barriers. The diesel generators are located in a separate building external to the main plant. Exterior walls are not sealed to provide 3-hour fire resistance. There are no potential fire hazards in close proximity to the walls. Fuel oil storage tanks for the diesels are located outside the building, underground. The primary fire suppression systems for the diesel generators are manually initiated fixed CO2 systems. Nine heat detectors which alarm locally and in the control room are provided in each diesel generator compartment. Drains for water from manual hose application are provided.
The diesel generator day tanks are located in a separate nonrated, concrete enclosure within the associated diesel generator FPP 3.1-61 REV. 21, APRIL 2017
PBAPS FPP compartment. A CO2 discharge nozzle and one heat detector is provided in each day tank enclosure.
Item No. 74 - Diesel Fuel Oil Storage Areas (F.10)
Diesel fuel oil tanks with a capacity greater than 1,100 gallons should not be located inside the buildings containing safety-related equipment. They should be located at least 50 feet from any building containing safety-related equipment, or, if located within 50 feet, they should be housed in a separate building with construction having a minimum fire resistance rating of 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.
Buried tanks are considered as meeting the 3-hour fir resistance requirements. See NFPA 30, "Flammable and Combustible Liquids Code," for additional guidance.
When located in a separate building, the tank should be protected by an automatic fire suppression system such as AFFF or sprinklers.
Tanks, unless buried, should not be located directly above or below safety-related systems or equipment regardless of the fire rating of separating floors or ceilings.
In operating plants where tanks are located directly above or below the diesel generators and cannot reasonably be moved, separating floors and main structural members should, as a minimum, have fire resistance rating of 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />. Floors should be liquid tight to prevent leaking of possible oil spills from one level to another. Drains should be provided to remove possible oil spills and fire-fighting water to a safe location.
One of the following acceptable methods of fire protection should also be provided:
(a) Automatic open-head deluge or open-head spray nozzle system(s)
(b) Automatic closed-head sprinklers (c) Automatic AFFF that is delivered by a sprinkler system or spray system.
Response
The diesel generator fuel oil storage tanks are located underground.
FPP 3.1-62 REV. 21, APRIL 2017
PBAPS FPP Item No. 75 - Safety Related Pumps (F.11)
Pump houses and rooms housing safety-related pumps should be protected by automatic sprinklers unless a fire hazards analysis can demonstrate that a fire will not endanger other safety-related equipment required for safe plant shutdown. Early warning fire detection should be installed with alarm and annunciation locally and in the control room. Local hose stations and portable extinguishers should also be provided.
Equipment pedestals or curbs and drains should be provided to remove and direct water away from safety-related equipment.
Provisions should be made for manual control of the ventilation system to facilitate smoke removal if required for manual fire-fighting operation.
Response
Rooms housing safety-related pumps are not equipped with automatic water fire suppression systems. Fire detectors are provided for all safety-related pumps. A fire in one room would not result in the loss of capability to safely shut down a unit. Separation requirements to assure safe shutdown in accordance with 10CFR50, Appendix R, have been satisfied (refer to Chapter 5).
Fire detectors are provided for the high pressure service water pump and HPCI pump rooms. The HPCI rooms are equipped with fixed CO2 fire suppression systems. Hose stations and portable fire extinguishers are provided. Safety-related pumps and support equipment are mounted on pedestals. Normal ventilation systems can be used for smoke removal.
Item No. 76 - New Fuel Area (F.12)
Hand portable extinguishers should be located within this area.
Also, local hose stations should be located outside but within hose reach of this area. Automatic fire detection should alarm and annunciate in the control room and alarm locally. The storage area should be provided with a drainage system to preclude accumulation of water.
The storage configuration of new fuel should always be so maintained as to preclude criticality for any water density that might occur during fire-fighting water application.
FPP 3.1-63 REV. 21, APRIL 2017
Response
New fuel is stored in high density storage racks on in the spent fuel pool. Portable fire extinguishers are provided. Hose stations are located on the refueling floor. Fire detectors are not provided. Floor drains are provided. A discussion of criticality considerations is contained in Section 10.3 of the FSAR. As indicated in Reference 6 of Appendix C, two smoke detectors were installed on the refueling floor in the vicinity of the only safety-related system, the ventilation stack radiation monitoring station. The ventilation stack monitoring stations were removed from the fuel floor. The associated smoke detectors were also removed since there was no other safety-related equipment in the area.
Item No. 77 - Spent Fuel Pool Area (F.13)
Protection for the spent fuel pool area should be provided by local hose stations and portable extinguishers. Automatic fire detection should be provided to alarm and annunciate in the control room and to alarm locally.
Response
Hose stations and portable extinguishers are provided on the refueling floor. As indicated in reference 6 of Appendix C, two smoke detectors were installed on the refueling floor (which includes the spent fuel pool) in the vicinity of the only safety-related system, the ventilation stack radiation monitoring station. The ventilation stack monitoring stations were removed from the refuel floor. The associated smoke detectors were also removed since there was no other safety related equipment in the area.
Item No. 78 - Radwaste Building (F.14)
The radwaste building should be separated from other areas of the plant by fire barriers having at least 3-hour ratings. Automatic sprinklers should be used in all area where combustible materials are located. Automatic fire detection should be provided to annunciate and alarm in the control room and alarm locally.
during a fire, the ventilation systems in these areas should be capable of being isolated. Water should drain to liquid radwaste building sumps.
Acceptable alternative fire protection is automatic fire detection to alarm and annunciate in the control room, in addition to manual hose stations and portable extinguishers consisting of handheld and large wheeled units.
FPP 3.1-64 REV. 21, APRIL 2017
Response
The radwaste building is separated from other areas of the plant by fire barriers of at least 3-hour fire rating where it is required to separate redundant safe shutdown methods. (See Item No. 21.) Automatic sprinklers are provided in the radwaste building fan room (no. 381). Automatic sprinklers are provided in the radwaste building drummed waste/storage area. Drains to the liquid radwaste system are provided. Automatic sprinklers are also provided for the M-G set rooms and the M-G set lube oil pumps Unit 2 only. Smoke detectors are provided throughout the radwaste building only in the vicinity of safety-related equipment and high combustible loadings. The ventilation system fans can be tripped and the fan dampers closed during a fire. Hose stations and portable fire extinguishers are provided.
Item No. 79 - Decontamination Areas (F.15)
The decontamination areas should be protected by automatic sprinklers if flammable liquids are stored. Automatic fire detection should be provided to annunciate and alarm in the control room and alarm locally. The ventilation system should be capable of being isolated. Local hose stations and hand portable extinguishers should be provided as backup to the sprinkler system.
Response
A personnel decontamination room is located in the radwaste building elevation 135 feet at columns J and H.
Equipment decontamination areas are located on the fires floor of the administration building. Flammable liquids are not stored in these areas. Automatic water fire suppression systems are not provided. General area smoke detectors are provided. Hose stations and portable fire extinguishers are provided.
Item No. 80 - Safety-Related Water Tanks (F.16)
Storage tanks that supply water for safe shutdown should be protected from the effects of fire. Local hose stations and portable extinguishers should be provided. Portable extinguishers should be located in nearby hose houses. Combustible materials should not be stored next to outdoor tanks. A minimum 50-foot separation should be provided between outdoor tanks and combustible materials where feasible.
FPP 3.1-65 REV. 21, APRIL 2017
Response
The condensate storage tanks (nonsafety-related) and the emergency cooling tower may supply water to be used for plant shutdown. The condensate storage tanks are located outdoors. The emergency cooling tower is of noncombustible construction and is located approximately 250 feet from the main plant. Hydrants and hose houses are located near the tanks and tower. Portable fire extinguishers are provided inside the emergency cooling tower structure.
Item No. 81 - Cooling Towers (F.17)
Cooling towers should be of noncombustible construction or so located that a fire will not adversely affect any safety-related systems or equipment. Cooling towers should be of noncombustible construction when the basins are used for the ultimate heat sink or for the fire protection water supply.
Response
PBAPS is provided with two cooling tower systems:
(1) circulating water cooling towers and (2) an emergency cooling tower. The circulating water cooling towers (nonsafety-related) are of combustible construction and are located approximately 600 feet from the nearest structure housing safety-related equipment.
The emergency cooling tower (safety-related) is of noncombustible construction. Cooling tower basins are not used for fire protection water supply.
Item No. 82 - Miscellaneous Areas (F.18)
Miscellaneous areas such as records storage areas, shops, warehouses, and auxiliary boiler rooms should be so located that a fire or effects of a fire, including smoke, will not adversely affect any safety-related systems or equipment. Fuel oil tanks for auxiliary boilers should be buried or provided with dikes to contain the entire tank contents.
Response
The maintenance shop and plant offices are located in the administration building, and the storeroom is located in the warehouse north of the plant. Both buildings are separate from the main plant. The auxiliary boilers are located in a separate building adjacent to the main plant. The main auxiliary boiler fuel oil storage tank and the auxiliary boiler diesel fuel oil day tank are located within a dike (110 percent of tank capacity).
FPP 3.1-66 REV. 21, APRIL 2017
PBAPS FPP The auxiliary boiler dirty oil tank is a double wall tank which is capable of containing 110 percent of the tank capacity.
Special Protection Guidelines (G)
Item No. 83 - welding and Cutting, Acetylene-Oxygen Fuel Gas Systems (G.1)
This equipment is used in various areas throughout the plant.
Storage locations should be chosen to permit fire protection by automatic sprinkler systems. Local hose stations and portable equipment should be provided as backup. The requirements of NFPA 51 and 51B are applicable to these hazards. A permit system should be required to utilize this equipment.
Response
Bulk storage of gas cylinders is provided outdoors adjacent to the administration building (nonsafety-related). Hydrants and hose stations are provided. The system complies with the requirements of NFPA 51 (Chapters 3 to 8 - not applicable) and NFPA 51B. See Response to Guidelines B.3.a, Item No. 10.c for control of ignition sources.
Item No. 84 - Storage Areas for Dry Ion Exchange Resins (G.2)
Dry ion exchange resins should not be stored near essential safety-related systems. Dry unused resins should be protected by automatic wet pipe sprinkler installations. Detection by smoke and heat detectors should alarm and annunciate in the control room and alarm locally. Local hose stations and portable extinguishers should provide backup for these areas. Storage areas of dry resin should have curbs and drains. (Refer to NFPA 92M, "Waterproofing and Draining of Floors.")
Response
Ion exchange resins used at PBAPS typically contain some moisture.
Prior to use, these resins may be temporarily stored inside the plant in approved areas. The temporary storage of resins is specifically controlled by administrative procedures. When not being used, resins are stored in warehouse. Since the resins are not stored near essential safety-related systems or in any one area in the plant, automatic suppression and detection systems are not specifically provided for this purpose.
Item No. 85 - Hazardous Chemicals (G.3)
Hazardous chemicals should be stored and protected in accordance with the recommendations of NFPA 49, "Hazardous Chemicals Data."
FPP 3.1-67 REV. 21, APRIL 2017
PBAPS FPP Chemical storage areas should be well ventilated and protected against flooding since some chemicals may react with water to ignite.
Response
Sodium hypochlorite is stored outdoors adjacent to the chlorination room. Storage tanks for sodium hydroxide and sulfuric acid are located inside the water treatment building (nonsafety-related). Two supply and two exhaust fans are provided for the water treatment building. The water treatment building floor is at elevation 116 feet. The flood of record (Agnes - June 1972) resulted in a maximum water level of 111 feet.
Item No. 86 - Materials Containing Radioactivity (G.4)
Materials that collect and contain radioactivity, such as spent ion exchange resins, charcoal filters, and HEPA filters, should be stored in closed metal tanks or containers that are located in areas free from ignition sources or combustibles. These materials should be protected from exposure to fires in adjacent areas as well. Consideration should be given to requirements for removal of isotopic decay heat from entrained radioactive materials.
Response
Spent ion exchange resins are handled by the plant radwaste system and shipped as solid radwaste in metal drums. Contaminated material awaiting compaction and drumming may be stored temporarily in the baling area of the radwaste building. Filters may be shipped in containers meeting applicable DOT regulations (may not be metal).
FPP 3.1-68 REV. 21, APRIL 2017
PBAPS FPP 3.2 APPENDIX R OF TITLE 10 CFR, PART 50 The purpose of this section is to compare the fire protection provisions of Peach Bottom Atomic Power Station Units 2 and 3 with the requirements of Appendix R of 10 CFR, Part 50.
To identify areas of potential impact and to facilitate comparison, a matrix addressing each requirement of Section III of Appendix R and relating to the plant systems, equipment, and components is included as Section 3.2.1. The matrix has extracted all requirements from Appendix R and given each an item number, 1 through 45. Each item has condensed a particular requirement and makes reference to the section in Appendix R where that requirement can be found. The general degree of conformance to the requirement is indicated in the "Comparison" column, using codes defined as follows:
C - indicates conformance to the requirement or conformance to its intent. Substantiating statements may be included as part of the matrix or in Section 3.2.2.
AC - indicates conformance to the requirement by alternative means or methods. The manner of conformance is included in the matrix or discussed in Section 3.2.2.
WC - indicates that design changes, means, or methods are planned in order to conform, or conform to the intent of the requirement. The planned design changes, means, or methods and the manner of conformance are discussed in Section 3.2.2.
NC - indicates that the plant is not in conformance and no design changes are planned. The basis for non-conformance to the requirement is included in the matrix or discussed in Section 3.2.2.
NA - indicates that the requirement is not applicable to Peach Bottom Atomic Power Station Units 2 and 3.
Substantiating statements are included as part of the matrix in Section 3.2.1.
In the "Remarks" column, additional information is provided to explain or expand on the degree of conformance. Alternatively, reference may be made to Section 3.2.2 for a more detailed discussion. The item numbers in Section 3.2.2 correspond to those in Section 3.2.1.
FPP 3.2-1 REV. 19, APRIL 2013
PBAPS FPP Section 3.2.1 DETAILED COMPARISON TO APPENDIX R OF TITLE 10 CFR PART 50 Appendix R Section III Item No. Appendix R Requirement Item No. Comparison Remarks Water Supplies for Fire Suppression Systems
- 1. Two separate water supplies shall be provided A AC The fire pumps take suction from to furnish necessary water volume and pressure independent, isolatable intake to the fire main loop. wells. The water source is Conowingo Pond.
- 2. Each supply shall consist of a storage tank, A AC In lieu of storage tanks, suction pump, piping, and appropriate isolation and is taken from independent, control valves. isolable intake wells.
- 3. These supplies shall be separated so that a A C See Section 3.2.2.
failure of one supply will not result in a failure of the other supply.
- 4. Each supply of the fire water distribution system A C shall be capable of providing the maximum expected water demands for a period of 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.
- 5. Requirements for ensuring minimum water volume A NA The service water and fire water when storage tanks are used for combined systems are not combined.
service-water/fire-water uses.
- 6. Requirements for other water systems used as A NA See Section 3.2.2.
sources of fire protection water.
Sectional Isolation Valves
- 7. Sectional isolation valves such as post B C Sectionalizing valves in the indicator valves or key operated valves shall fire system piping provide the be installed in the fire main loop to permit capability of maintaining system isolation of portions of the main fire main operability with portions out of loop for maintenance or repair without service. Sectionalizing interrupting the entire water supply. capability is provided by post-indicator valves.
FPP 3.2-2 REV. 19, APRIL 2013
PBAPS FPP Section 3.2.1 (Cont'd)
Appendix R Section III Item No. Appendix R Requirement Item No. Comparison Remarks Hydrant Isolation Valves
- 8. Valves shall be installed to permit isolation C C of outside hydrants from the fire main for maintenance or repair without interrupting the water supply to automatic or manual fire suppression systems.
Manual Fire Suppression
- 9. Standpipe and hose systems shall be installed D AC See Section 3.2.2.
so that at least one effective hose stream will be able to reach any location that contains or presents an exposure fire hazard to structures, systems, or components important to safety.
- 10. Access to permit effective functioning of the D C fire brigade shall be provided to all areas that contain or present an exposure fire hazard to structures, systems, or components important to safety.
- 11. Standpipe and hose stations shall be inside PWR D NA The primary containment is containments and BWR containments that are not inerted with nitrogen during inerted. reactor operation.
- 12. For BWR drywells, standpipe and hose stations D C shall be placed outside the drywell with adequate lengths of hose to reach any location inside the drywell with an effective hose stream.
Hydrostatic Hose Tests
- 13. Fire hose shall be hydrostatically tested at a E C pressure of 150 psig or 50 psi above maximum fire main operating pressure, whichever is greater.
Hose stored in outside hose houses shall be tested annually. Interior standpipe hose shall be tested every 3 years.
FPP 3.2-3 REV. 19, APRIL 2013
PBAPS FPP Section 3.2.1 (Cont'd)
Appendix R Section III Item No. Appendix R Requirement Item No. Comparison Remarks Automatic Fire Detection
- 14. Automatic fire detection systems shall be F AC See Section 3.2.2 installed in all areas of the plant that contain or present an exposure fire hazard to safe shutdown or safety-related systems or components. These fire detection systems shall be capable of operating with or without offsite power.
Fire Protection of Safe Shutdown Capability
- 15. Fire damage shall be limited so that one train G.1.a C Refer to Chapter 5 for safe of systems necessary to achieve and maintain shutdown analysis.
hot shutdown conditions from either the control room or emergency control station is free of fire damage.
- 16. Fire damage shall be limited so that systems G.1.b C Refer to Chapter 5 for safe necessary to achieve and maintain cold shutdown analysis.
shutdown from either the control room or emergency control station can be repaired within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
- 17. Consideration of associated non-safety circuits G.2 C Refer to Chaper 6 (Special as requiring protection to ensure freedom from (part of first Topics) for associated circuits fire damage. paragraph) analysis.
- 18. Alternative means of ensuring that one train of G.2.a C Refer to Chapter 5 for systems necessary to achieve and maintain hot G.2.b description of alternative shutdown is free of fire damage (where cables G.2.c shutdown capability. See or equipment of redundant trains are located Section 3.2.2 for structural in the same fire area). steel protection.
- 19. Alternative means of providing fire protection G.2.d NA Containment at Peach Bottom inside non-inerted containments. G.2.e is inerted.
G.2.f
- 20. Provision of alternative or dedicated shutdown G.3 C Refer to Chapter 5 for safe capability in certain fire areas. and alternative shutdown analysis.
FPP 3.2-4 REV. 19, APRIL 2013
PBAPS FPP Section 3.2.1 (Cont'd)
Appendix R Section III Item No. Appendix R Requirement Item No. Comparison Remarks Fire Brigade
- 21. Requirements for the onsite fire brigade. H C Refer to Appendix C, reference 1.
Fire Brigade Training
- 22. Requirements for training of fire brigade members. I AC Refer to Appendix C, reference 1.
Operators are not trained in the charging of the self-contained breathing air bottles.
- 23. Emergency lighting units with at least an 8-hour J AC See Section 3.2.2.
battery power supply shall be provided in all areas needed for operation of safe shutdown equipment and in access and egress routes thereto.
Administrative Controls
- 24. Establishment of administrative controls to K C Refer to Appendix C, reference 1.
minimize fire hazards.
Alternative and Dedicated Shutdown Capability
- 25. The shutdown capability provided for a specific L.1 C Refer to Chapter 5 for safe fire area shall be able to achieve and maintain shutdown analysis.
subcritical reactivity conditions in the reactor, maintain reactor coolant inventory, achieve and maintain hot shutdown conditions, achieve cold shutdown conditions within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, and maintain cold shutdown conditions thereafter.
- 26. During the postfire shutdown, the reactor coolant L.1 C Refer to Chapter 5 for safe system process variables shall be maintained shutdown analysis.
within those predicted for a loss of normal ac power, and the fission product boundary integrity shall not be affected.
FPP 3.2-5 REV. 19, APRIL 2013
PBAPS FPP Section 3.2.1 (Cont'd)
Appendix R Section III Item No. Appendix R Requirement Item No. Comparison Remarks
- 27. Performance goals for the shutdown functions. L.2 C Refer to Chapter 5 for safe shutdown analysis.
- 28. The alternative shutdown capability shall be L.3 C Refer to Chapter 5 for safe independent of the specific fire areas. shutdown analysis.
- 29. The shutdown capability shall accommodate L.3 C Refer to Chapter 5 for safe postfire conditions where offsite power is shutdown analysis.
available and where offsite power is not available for 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
- 30. If the capability to achieve and maintain cold L.4 C Refer to Chapter 5 for safe shutdown will not be available because of fire shutdown analysis.
damage, the equipment and systems comprising the means to achieve and maintain the hot shutdown condition shall be capable of maintaining such conditions until cold shutdown can be achieved.
- 31. If the equipment and systems comprising the means L.4 C Refer to Chapter 5 for safe to achieve and maintain hot shutdown conditions shutdown analysis.
will not be capable of being powered by both onsite and offsite electric powered systems because of fire damage, an independent onsite power system shall be provided.
- 32. Equipment and systems comprising the means to L.5 C Refer to Chapter 5 for safe achieve and maintain cold shutdown conditions shutdown analysis.
shall not be damaged by fire; or the fire damage to such equipment and systems shall be limited so that the systems can be made operable and cold shutdown can be achieved within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
- 33. Materials for such repairs shall be readily L.5 C Refer to Chapter 5 for safe available on site and procedures shall be in shutdown analysis.
effect to implement such repairs.
FPP 3.2-6 REV. 19, APRIL 2013
PBAPS FPP Section 3.2.1 (Cont'd)
Appendix R Section III Item No. Appendix R Requirement Item No. Comparison Remarks
- 34. If the equipment and systems comprising the L.5 C Refer to Chapter 5 for safe means to achieve and maintain cold shutdown shutdown analysis.
conditions (and which are used prior to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> after the fire) will not be capable of being powered by both offsite and onsite power systems because of fire damage, an independent onsite power system shall be provided.
- 35. Shutdown systems installed to ensure postfire L.6 C Refer to Chapter 5 for safe shutdown capability need not be designed to meet shutdown analysis.
seismic Category I criteria, single failure criteria, or other design basis accident criteria, except where required for other reasons.
- 36. Isolation of safe shutdown equipment and systems L.7 C Refer to Chapter 5 for safe from associated non-safety circuits. shutdown analysis.
Fire Barrier Cable Penetration Seal Qualification
- 37. Requirement for noncombustible seal materials deleted per change in 10CFR50, Appendix R as identified in Federal Register Notice 65FR38182-38191, Dated June 20, 2000.
- 38. Penetration seal designs shall be qualified by M C/AC See Section 3.2.2.
tests that are comparable to tests used to rate fire barriers.
- 39. The penetration seal shall be tested in M.1 C/AC See Section 3.2.2.
accordance with acceptance criteria to M.2 verify that the seal is capable of providing M.3 the fire resistance required of the barrier.
Fire Doors
- 40. Fire doors shall be self-closing or provided with N C See Section 3.3.1, Item No. 34.
closing mechanisms.
- 41. Fire doors shall be inspected semiannually to N C verify that automatic hold-open, release, and closing mechanisms and latches are operable.
FPP 3.2-7 REV. 19, APRIL 2013
PBAPS FPP Section 3.2.1 (Cont'd)
Appendix R Section III Item No. Appendix R Requirement Item No. Comparison Remarks
- 42. Alternative means for ensuring that fire doors N.1 C See Section 3.2.2.
protect the door opening as required in case of N.2 fire. N.3 N.4
- 43. The fire brigade leader shall have ready access N C to keys for any locked fire doors.
- 44. Areas protected by automatic total flooding gas N C Doors to cable spreading room, suppression systems shall have electrically HPCI pump rooms, diesel supervised self-closing fire doors or shall generator bays, and plant be closed and electrically supervised. computer room are electrically supervised.
Oil Collection System for Reactor Coolant Pump
- 45. The reactor coolant pump shall be equipped with O NA The primary containment is an oil collection system if the containment is inerted with nitrogen during not inerted during normal operation. normal reactor operation.
FPP 3.2-8 REV. 19, APRIL 2013
PBAPS FPP 3.2.2 Explanatory Notes for Comparison to Appendix R Item 3 - Appendix R Requirement Section III.A These supplies shall be separated so that a failure of one supply will not result in a failure of the other supply.
PBAPS Design The source of water for fire protection is Conowingo Pond. The fire pumps are located in the intake structure in separate seismic Category I rooms with walls which have a fire rating commensurate with the amount of fixed combustibles (see Chapter 5, fire areas 48 and 47 for discussion). Separate supply lines to the yard fire main loop are provided from each pump. The connection points are approximately 24 feet apart with an isolation valve between.
Item 6 - Appendix R Requirement Section III.A Other water systems used as one of the two fire water supplies shall be permanently connected to the fire main system and shall be capable of automatic alignment to the fire main system. Pumps, controls, and power supplies in these systems shall satisfy the requirements for the main fire pumps. The use of other water systems for fire protection shall not be incompatible with their functions required for safe plant shutdown. Failure of the other system shall not degrade the fire main system.
PBAPS Design No water systems other than the two intakes from Conowingo Pond are used as fire water supplies; therefore, this guideline does not apply to PBAPS.
Item 9 - Appendix R Requirement Section III.D Standpipe and hose systems shall be installed so that at least one effective hose stream will be able to reach any location that contains or presents an exposure fire hazard to structures, systems, or components important to safety.
PBAPS Design Standpipe or hose systems are not installed in the diesel-generator building. The diesel-generator building is protected by manually actuated total flooding CO2 systems, portable dry chemical and CO2 extinguishers and can be reached by hose from nearby hydrants (maximum distance is approximately 180 feet less than the length of available hose).
FPP 3.2-9 REV. 19, APRIL 2013
PBAPS FPP Hose stations are equipped with 100 feet of hose. Hose reel carts on elevations 165 feet and 195 feet of each reactor building are equipped with 200 feet of hose capable of reaching elevations 180 feet and 214 feet. All emergency core cooling system (ECCS) pumps can be reached by a stream of water from a nozzle not more than 30 feet away attached to not more than 100 feet of hose.
Item 14 - Appendix R Requirement Section III.F Automatic fire detection systems shall be installed in all areas of the plant that contain or present an exposure fire hazard to safe shutdown or safety-related systems or components. These fire detection systems shall be capable of operating with or without offsite power.
PBAPS Design Inasmuch as 10 CFR 50, Appendix R, paragraph III.F provides no specific criteria for the number, location, and type of fire detectors, criteria used to locate detectors are based on NFPA 72E, modified to address combustible loading, ventilation characteristics, room size, room geometry, and room congestion.
These criteria are consistent with those accepted in Supplements 1 and 3 to the Peach Bottom Fire Protection Safety Evaluation Report. Instances of nonconformance with code requirements for detector location are discussed in Philadelphia Electric Co.
letter to the NRC dated March 20, 1981. In addition, all areas containing fire detectors have been inspected and evaluated with respect to NFPA 72E for compliance. For areas in which the smoke detectors were not in strict compliance with NFPA 72E-1984 a qualified fire protection engineer evaluated the effectiveness of the detectors with respect to the aforementioned criteria. The location and type/designation of the fire detectors are listed in Table 3.14.7-1 of the PBAPS Technical Requirements Manual. See Section 3.3.1, Item Nos. 1, 2, 3, and 5 for evaluation of specific areas.
An exemption from the requirement of Appendix R,Section III.F was granted by the NRC in the SER dated March 13, 1985. The fire areas/zones affected by these exemption requests are as follows:
MSIV Rooms (17-21 and 20-29)
Chemical Waste Tank Room (21-65B)
Offgas Line Tunnels (50-130 and 50-131)
Diesel Generator Building Ventilation Supply Enclosures (43-132,44-133, 45-134, and 46-135)
An exemption from the requirements of Appendix R,Section III.F was granted by the NRC in the SER dated November 14, 1986, for the emergency cooling tower stairwell (fire area 51-136).
FPP 3.2-10 REV. 19, APRIL 2013
PBAPS FPP In a letter from the licensee to the NRC dated September 16, 1983 (see reference 25 in Appendix C) three additional areas were identified where detection would not be installed in accordance with Appendix R,Section III.F. These areas do not contain safety-related equipment but do contain safety-related cabling in raceway. In lieu of detection, a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rated barrier was installed to protect the safety related raceway in the areas.
The three areas are as follows:
Fire Area/Zone 4-6 Stairwell No. 24 Fire Area/Zone 5-7 Stairwell No. 18 Fire Area/Zone 12-15 Stairwell No. 23 An exemption from the requirements of Appendix R,Section III.F was granted by the NRC in the SER dated August 18, 2000. The fire zone included in this exemption request are as follows: 50-78W U2 Turbine Building rooms 22, 138 and 223;50-78V U3 Turbine Building rooms 181 and 272;50-78B U2/U3 Common Turbine Building rooms135, 184, 185, 228, 229, and 274; 50-88 Unit 2 Main Turbine Lube Oil Storage Tank Room, 50-89 Unit 3 Main Turbine Lube Oil Storage Tank Room; 50-78EE Unit 3 Steam Jet Air Ejector Room; 6S-5M Unit 2 Reactor Water Clean-up (RWCU) Backwash Tank Transfer Pump Room; 13N-13M Unit 3 RWCU Backwash Tank Transfer Pump Room; 6S-42 Unit 2 RWCU Non-Regenerative Heat Exchanger Room and 13N-36 Unit 3 RWCU Non-Regenerative Heat Exchanger room.
An exemption from the requirements of Appendix R,Section III.F was granted by the NRC in a Safety Evaluation Report dated December 7, 2001. The fire zones addressed by this exemption request were: 50-78B, Room 429, elevation 165 Common Area Turbine Building, and 50-99, Room 222, 4th and 5th stage Unit 2 Feedwater Heater Room.
Item 18 - Appendix R Requirement Section III.G.2.a Separation of cables and equipment and associated non-safety circuits of redundant trains by a fire barrier having a 3-hour rating. Structural steel forming a part of or supporting such fire barriers shall be protected to provide fire resistance equivalent to that required of the barrier.
PBAPS Design All structural steel forming a part of or supporting fire barriers has been shown analytically to have fire resistance equivalent to that required of the barrier; otherwise, appropriate protection will be provided in the form of structural steel fire proofing or cable tray covers (refer to Appendix C, reference 18). An exemption request for areas which could experience higher than FPP 3.2-11 REV. 19, APRIL 2013
PBAPS FPP acceptable temperatures but need not be modified was granted by the NRC in the SER dated December 31, 1986.
Item 22 - Appendix R Requirement Section III.I.3.a Fire brigade drills shall be performed in the plant so that the fire brigade can practice as a team.
PBAPS Design One fire brigade drill for each shift team is performed during annual fire school. The fire brigade shift members attend fire school together so they do perform the drill as a team. The burn building at the fire school mimics an industrial facility. The drills involve actual fires, using charged fire fighting equipment in an industrial type environment. This provides for a more realistic drill scenario and still permits the shift crew to practice as a team.
Item 23 - Appendix R Requirement Section III.J Emergency lighting units with at least an 8-hour battery power supply shall be provided in all areas needed for operation of safe shutdown equipment and in access and egress routes thereto.
PBABS Design Areas provided with 8-hour battery powered emergency lighting were identified in Appendix C, references 15 and 16. Those areas presently provided with 8-hour battery powered emergency lights are summarized below:
- 1. Main control room
- 2. Remote shutdown panel area
- 3. High pressure service water pump bays
- 4. Fifth bay of the diesel-generator building
- 5. Cable spreading room - selected locations
- 6. HPCI alternative control station
- 7. 4-kV switchgear rooms
- 8. Access and egress routes thereto Emergency lighting is provided in support of operator manual actions required by safe shutdown and alternative shutdown procedures. For the access and egress routes to structures beyond the Power Block, portable lanterns with at least 8-hours' battery supply are stored in an emergency equipment cabinet.
Fixed, self-contained, nominally 8-hour rated, dc emergency battery lighting units are provided in all Plant areas, with the exception of the Control Room and the alternative control station FPP 3.2-12 REV. 19, APRIL 2013
PBAPS FPP (ACS) locations, where post-fire safe shutdown manual actions must be performed and in access and egress routes thereto.
Fixed emergency lighting in the Control Room is provided by two subsystems of 8-hour, non-safety related, dedicated stationary batteries along with their associated chargers and dc to ac inverters. The two subsystems of batteries, chargers, inverters and associated cables are electrically isolated and spatially separated from each other to prevent a single fire or electrical malfunction from affecting more than one of the two subsystems.
The Alternative Control Stations are provided with station battery-backed lights. The batteries and their chargers are protected from a fire in the control room, the cable spreading room, the computer room, or the emergency shutdown panel area.
The lights are maintained in the off position to reduce loading on the safety-related batteries during non-fire events. They are switched to the on position as part of the Alternative Shutdown procedure when required.
Items 37, 38, and 39 - Appendix R Requirements III.M Fire barriers at Peach Bottom are provided to separate redundant safe shutdown trains as required in Section III.G of Appendix R.
Locations of all plant fire barriers are shown in Figures B-4 through B-13.
Wall and floor construction for fire barriers is summarized in Chapter 5 and outlined below:
- 1. Most barriers are reinforced concrete.
- 2. Structural steel beams supporting floors in all areas of the plant containing safe shutdown equipment were evaluated to determine capability of the beams to withstand a fire. Beams requiring fire proofing have been protected in accordance with the SER dated December 31, 1986.
- 3. Concrete block walls serving as a 2-hour fire barrier were constructed and installed in accordance with UL Standard 618 for Safety-Concrete Masonry Units. Refer to Chapter 5 for effect of walls on safe shutdown.
- 4. A 1/4-inch steel plate wall separates the Unit 2 and 3 high pressure service water pump bays in the circulating water pump structure. The plate, although not tested to demonstrate its ability to withstand a three-hour fire, provides a level of fire protection in excess of the FPP 3.2-13 REV. 19, APRIL 2013
PBAPS FPP hazard in each area. Refer to Chapter 5, area 48 for impact on safe shutdown.
- 5. A 4-inch-high by 1/4-inch thick steel angle traverses the top of the wall between fire area 25 and 2 on elevation 165 feet. The angle, although not tested to demonstrate its ability to withstand a 3-hour fire, provides a level of fire protection in excess of the hazard in each area as described in the associated fire hazards analysis (Reference 10). Refer to Chapter 5, area 25 for impact on safe shutdown.
Fire dampers are provided in HVAC penetrations through fire barriers as needed to maintain the fire resistance of the barrier.
Dampers are guillotine, curtain or trap door type, with fusible links rated at 165° F. The damper installations consist of a single 3-hour rated damper, 2, 1-1/2 hour rated dampers in series or a single 1-1/2 hour rated damper. A fire hazards analysis was performed which concluded that several HVAC penetrations do not require fire dampers to achieve the fire resistance needed by the barrier. Chapter 5 references the appropriate NRC Safety Evaluation Report for those HVAC openings penetrating a fire barrier which do contain a 3-hour rated fire damper. An analysis was also performed to evaluate the ability of fire dampers to close against airflow. Procedures have been implemented to deenergize HVAC systems associated with fire dampers which would not close against airflow immediately upon verification of a fire which could cause the dampers to close.
Penetration seals in fire barriers provide fire resistance equal to that required by the barrier to withstand a fire equivalent to the combustible loading in the surrounding rooms. Seals were qualified to ASTM Standard E-814, Standard Test Method for Fire Tests of Through Penetration Fire Stops, or American Nuclear Insurers NEL-PIA/MAERP, Standard Method of Fire Tests of Through-Penetration Fire Stops. The test standards exposed the seals to the standard time temperature curve found in ASTM E-119.
Penetration seals which, because of field conditions, could not be installed in strict accordance with tested configurations and procedures, were controlled by procedure to ensure that the integrity of the barriers was not compromised. The penetration seal program documents the deviation types. As outlined in Generic Letter 86-10, Section 3.2.2, the deviations satisfy the following criteria:
- 1. The continuity of the fire barrier material is maintained.
- 2. The thickness of the barrier is maintained.
FPP 3.2-14 REV. 19, APRIL 2013
- 3. The nature of the support assembly is unchanged from the tested configuration.
- 4. The application or "end use" of the fire barrier is unchanged from the tested configuration. For example, the use of a cable tray barrier to protect a cable tray which differs in configuration from those that were tested would be acceptable. However, the use of structural steel fire proofing to protect a cable tray assembly may not be acceptable.
- 5. The configuration has been reviewed by a qualified fire protection engineer and found to provide an equivalent level of protection.
In accordance with Generic Letter 86-10, a fire hazard analysis was performed for deviations and the respective justifications that fail to satisfy one of these criteria. The analysis confirmed that the seal designs provide a fire resistance equivalent to that required by the barrier (Reference 10). These deviations include:
- 1. Internal bus duct seals (described in Section 5.3)
- 2. Internal conduit sealing criteria (described in this section)
Polyurethane foam, a combustible material, has been utilized in certain applications as described in the SER dated November 14, 1986, to provide 3-hour fire resistant penetration seals.
Testing, in accordance with ASTM E-119, satisfactorily demonstrated the seal configurations ability to withstand a fire.
The majority of the penetration seal types consist of the following configurations:
- 1. Cement-type grout.
- 2. Foamed silicone polymer. This is a self-vulcanizing material that results from the mixture of two liquid components.
- 3. Solid silicone polymer. The polymer is impregnated with a powdered high-density filler.
- 4. Flexible boot with ceramic fiber. The boot material is silicone rubber with woven glass fiber reinforcing.
Ceramic fiber is installed inside the boot, in the space between the penetrating object and the edge of the FPP 3.2-15 REV. 19, APRIL 2013
PBAPS FPP penetration opening. Stainless steel compression straps and silicone adhesives are used in attaching the boot.
- 5. Fire rated link-seals. Modular, mechanical type seals consist of interlocking synthetic rubber links shaped to continuously fill the annular space between a pipe and the wall opening.
- 6. Ceramic fiber seals. Mineral wool is used in either empty sleeves with a metal cap or in annular gaps between pipes and sleeves with welded steelplate anchors.
Openings inside conduit were evaluated to determine their effect on the integrity of fire barriers. For conduits that have an access point (i.e., conduit cover, junction box, etc.) at the barrier, a 3-hour-rated fire seal is provided. For conduits with an access point within 5'-0" of a barrier, a 3-hour fire seal is provided on the side that contains the nearest access point.
Conduits with an access point greater than 5'-0" from a barrier on both sides are not sealed if the access point is outside the room adjacent to the barrier or if the access point is normally not open (i.e., closed junction box, condulets with conduit covers).
Conduits that enter a barrier but do not completely penetrate is are not considered a penetration and are, therefore, not sealed.
Conduits with and access point greater than 5'0" from a barrier on both sides and containing an open access point are sealed to prevent the passage of smoke and hot gases. A Fire hazards Analysis, Reference 10, provides a detailed description and justification for internal conduit sealing.
Item 42 - Appendix R Requirement Section III.N All fire doors in safe shutdown fire barriers are electrically supervised or otherwise maintained closed in order to provide fire resistance in accordance with the requirements of Appendix R to 10CFR50. These doors are inspected in accordance with the provisions of the Technical Requirements Manual and Appendix R.
(Refer to FPP Section 3.3.2, Item No. 34, and Appendix C, reference 5).
FPP 3.2-16 REV. 19, APRIL 2013
PBAPS FPP 3.3 SAFETY EVALUATION REPORT The purpose of this section is to compare the fire protection provisions of Peach Bottom Atomic Power Station Units 2 and 3 with the commitments made in the Fire Protection Safety Evaluation Report (SER) and its supplements (see references 17, 18, 19, 20, 21, and 29 in Appendix C).
To identify areas of potential design impact and to facilitate a comparison of SER commitments and installed plant conditions, a matrix, which addresses each modification, each incomplete item, and each fire protection feature listed in the SER and which relates to the plant systems, equipment, components, and operation, was prepared and is included in Section 3.3.1 of this report. The matrix has extracted all modifications, incomplete items, and fire protection features from the SER and given each item a number, 1 through 112. Each item has condensed a particular modification or incomplete issue and makes reference to the applicable sections of the SER where the details of the modification or incomplete item can be found. The general degree of conformance to the guideline is indicated in the "Comparison" column, using the codes defined as follows:
C - indicates conformance to the guideline or conformance to its intent. Substantiating statements may be included as part of the matrix or in Section 3.3.2.
AC - indicates conformance to the guidelines by alternate means or methods. The manner of conformance is included in the matrix or discussed in Section 3.3.2.
WC - indicates that design changes, means, or methods are planned in order to conform, or conform to the intent of the guideline. The planned design changes, means, or methods and the manner of conformance are discussed in Section 3.3.2.
NC - indicates that the plant is not in conformance and no design changes are planned. The basis for non-conformance to the guideline is included in the matrix or discussed in Section 3.3.2.
NA - indicates that the guideline is not applicable to Peach Bottom Atomic Power Station Units 2 and 3.
Substantiating statements are included as part of the matrix in Section 3.3.1.
FPP 3.3-1 REV. 21, APRIL 2017
PBAPS FPP In the "Remarks" column, additional information is provided to explain or expand on the degree of conformance. Alternatively, reference may be made to Section 3.3.2 for a more detailed discussion. The item numbers in Section 3.3.2 correspond to those in Section 3.3.1.
FPP 3.3-2 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 DETAILED COMPARISON TO SAFETY EVALUATION REPORT Item No. SER Section Requirement SER Section Nos. Comparison Remarks Fire Detection Systems
- 1. Install additional smoke detectors in the 3.1.1, 4.2, 5.2, C See Section 3.3.2.
following areas: 5.3, 5.5, 5.6, 5.10, 5.12, 5.15, 5.16 (1) Residual heat removal pump rooms (2) Reactor core isolation cooling pump rooms (3) Core spray pump rooms (4) Deleted (5) Enclosed rooms within the control room complex (6) Cable spreading room (7) Diesel generator Rooms AC Heat detectors were installed in lieu of smoke detectors to preclude false alarms due to diesel exhaust fumes and will provide adequate coverage because a fire will have a high heat release rate.
(8) Diesel generator auxiliary room (9) High pressure service water pump rooms to replace the existing heat detectors (10) Battery rooms FPP 3.3-3 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks
- 2. The need will be evaluated for additional 3.2.3, 5.2, 5.6, C See Section 3.3.2 early fire detectors in: 5.7, 5.8, 5.9 (1) Fire zones 6-5H, 7-5J, 8-5K,13-13H, 14-13J,15-13K, 6-19, 13-27, 6-20, 13-30, 17-21, 20-29, 6-23, and 13-31 (2) Ceiling above the control room (3) Enclosed panels in the control room NA See Section 3.3.2.
which contain redundant channels (4) Torus compartment and instrumentation rack rooms (5) Drywell Drywell contains 3 general area smoke detectors and normally inerted with nitrogen during plant operation. Configuration was accepted in SER Supplement No. 3.
- 3. A qualified fire protection engineer will 3.2.3, 4.2 AC See Section 3.3.2 review the fire detector installation design to ensure that the placement and sensitivity of the detectors will adequately provide early warning
- 4. The feasibility of installing remote alarm 3.2.3, 4.2 C See Section 3.3.2.
lamps for new or existing detectors which are obstructed from sight in large rooms with multiple detectors will be studies.
- 5. The necessity for installing additional 3.2.3, 4.2, 5.1, AC Refer to Appendix C, detectors in all of those areas that 5.2, 5.13 reference 6. See contain safety-related equipment and those Section 3.2.2, Item No. 14 areas that pose a hazard to safety-related and Section 3.3.2.
areas will be evaluated.
- 6. Heat detectors which alarm in the control 4.4.2 C room are provided in the filter ductwork of both the standby gas treatment system and the recombiner building ventilation system.
FPP 3.3-4 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks Water Suppression Systems
- 7. Fire suppression systems will be installed: 3.1.2.A, 4.3, 4.8, AC See Section 3.3.2.
5.1, 5.4, 5.13, 5.14 (1) On elevation 116 feet of the turbine building for protection of anti-contamination clothing stored in this area. An acceptable alternative is to permanently relocate the anticontamination clothing to an area separated from safe shutdown equipment by a 3-hour fire barrier.
(2) Recirculation pump motor generator set (2) See Section 3.3.2, Item 7 lube oil pump rooms.
(3) Drummed waste/storage area of the radwaste building.
- 8. Heat reflecting shields will be provided for 3.1.2.B, 4.3, 5.1 C sprinklers under the grating in the main turbine lube oil reservoir rooms.
- 9. The adequacy of protection will be 3.2.4, 4.14, 5.14, C See Section 3.3.2.
evaluated in: 5.17 (1) Recombiner building (2) Fire zones 4-4C, 2-12C (3) Recombiner building for the ventilation system filters.
- 10. The design and installation of the wet pipe 4.3.1(5) AC See Section 3.3.2, automatic sprinkler systems, manually initiated Item Nos. 7 and 18.
preaction systems, and both manual and thermal detector-actuated deluge systems conform to the provisions of NFPA 13 and 15.
- 11. Automatic deluge water spray systems are 4.3.1(5), 5.18.3 C provided at the outside main auxiliary trans-formers and at the startup transformer at the southwest corner of the turbine building.
FPP 3.3-5 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks
- 12. Water suppression systems are also provided 4.3.1(5), 5.12 C inside the plant to protect the charcoal filters in the standby gas treatment system and the recombiner building ventilation systems.
- 13. Each of the two seal oil reservoirs and pumping 4.3.1(5), 5.1.4 C units at the 116-foot elevation in fire zone 78B are protected by an automatically activated sprinkler system
- 14. Wet pipe sprinkler systems are provided for the 4.3.1(5), 5.1.4 C drummed oil storage area.
- 15. Wet pipe sprinkler systems are provided for the 4.3.1(5), 5.1.4 C reactor feed pump turbine lube oil reservoir rooms.
- 16. Wet pipe sprinkler systems shall be installed 4.3.1(5), 5.1.4 C for the main turbine lube oil storage tank rooms
- 17. Wet pipe sprinkler systems are installed 4.3.1(5), 5.1.4 C for the main turbine lube oil reservoir rooms.
- 18. Fixed water suppression systems are provided 4.1.3(5), 5.1.4 See Section 3.3.2.
in the turbine generator equipment areas on the 116-, 135-, and 150-foot elevations.
- 19. The diesel engine driven fire pump 4.3.1(5), 5.16 C room is protected by a wet pipe automatic sprinkler system.
Hose Stations
- 20. All hose stations will be fitted with 3.1.3(1), 4.3, AC See Section 3.3.2 and sufficient hose length to permit effective 5.9, 5.11 3.2.1 Item 9.
application of a hose stream to all safety-related equipment serviced by the particular station.
- 21. All hose stations will have the hose 3.1.3(2), 4.3 C connected to the station valve.
FPP 3.3-6 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks
- 22. All hose stations will be equipped with a 3.1.3(3), 4.3 C ball shutoff valve.
- 23. Additional hose will be provided to serve 3.1.3(4), 4.3 C the 180- and 214-foot elevations of the reactor buildings.
- 24. The need for additional hose stations and 3.2.7, 4.3, 5.6 AC See Section 3.3.2.
access ladders in the torus compartments Additional hose is not will be evaluated. required as long as hose stations outside of torus compartments provide coverage.
- 25. The feasibility of installing variable 3.2.7, 4.3, 5.2, AC See Section 3.3.2.
gallonage nozzles at stations servicing 5.3, 5.4 the control room complex, cable spreading room, and emergency switchgear rooms will be evaluated.
- 26. There are 97 hose stations throughout the plant each with at least 100 feet of 1-1/2-inch hose and adjustable spray nozzles. The following areas identified in the SER are served:
Turbine building 5.1.4 C Turbine building near the entrance to 5.2.4 C the main entrance to the control room Turbine building near the cable 5.3.4 C spreading room Vicinity of all emergency switchgear 5.4.4 C rooms Turbine building within reach of 5.5.4 C all battery rooms Radwaste building and turbine building 5.6.4, 5.12.4 C on elevation 91 feet, 6 inches to provide coverage of reactor building, elevation 91 feet, 6 inches.
FPP 3.3-7 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks Reactor building elevation 135 feet. 5.7.4, 5.11.6 C A nozzle attached to hose will be able to reach the 119-foot elevation of drywell below recirculation pumps where oil would accumulate Reactor building elevation 165 feet 5.8.4 C Reactor building elevation 195 feet 5.9.4 C Reactor building elevation 234 feet 5.10.4 C Radwaste building, fire zone 72A 5.13.4 C Radwaste building, fire zones 4B, 5.14.4 C 4C, 12B and 12C Circulating water pumphouse 5.16.4 C Recombiner building elevations 136 feet 5.17.4 C and 157 feet Portable Extinguishers
- 27. Two 2-1/2-gallon pressurized water 3.1.4(1), 5.2 AC See Section 3.1.2, Item extinguishers will be installed in one or No. 35 and Section 3.3.2.
more of the enclosed rooms within the control room complex.
- 28. All welding carts will be equipped with 3.1.4(2), 4.3 C portable extinguishers or administrative controls will be implemented to ensure that fire extinguishers are located in the immediate area where welding is being performed.
- 29. Two carbon dioxide extinguishers will be 3.1.4(3), 5.4 AC Extinguishers are located installed in both the corridor on the west in the stairwell, behind side of the switchgear rooms and in the unlocked doors to the turbine building on the east side of corridor which will not this area. impede access to them rather than in the narrow corridor itself.
Refer to Appendix C, reference 7.
FPP 3.3-8 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks
- 30. The main turbine bearings are provided with 5.1 AC The dry chemical system has been fittings to which a 350-pound, wheeled, dry removed and is replaced with a wet pipe chemical container may be connected. automatic suppression system, Mod 1832
- 31. Portable dry chemical and/or carbon dioxide extinguishers are provided throughout the:
Turbine building 5.1.4 C Control room complex 5.2.4 C Cable spreading room area 5.3.4 C Emergency switchgear rooms and nearby 5.4.4 C Near the station battery rooms 5.5.4 C Reactor building instrument rack rooms 5.6.4 C and pump rooms on lowest level of torus compartment Reactor building elevation 135 feet 5.7.4 C Reactor building elevation 165 feet 5.8.4 C Reactor building elevations 195 and 5.9.4 C 214 feet Reactor building elevation 234 feet 5.10.4 C Radwaste building elevation 91 feet 5.12.4 C 6 inches Radwaste building, fire zone 72A 5.13.4 C Radwaste building, fire zone 4B, 4C, 12B, 5.14.4 C Each diesel generator room and auxiliary 5.15.4 C tray Circulating water pumphouse 5.16.4 C Recombiner building elevations 136 feet, 5.17.4 C 146 feet and 157 feet FPP 3.3-9 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks Fire Doors
- 32. The watertight doors in the center section 3.1.5(1), 5.16 C of the circulating water pump structure will be electrically supervised.
- 33. Doors to the condensate pump room will be 3.1.5(2), 5.13 C See Section 3.3.2 upgraded.
- 34. The need for modifications to ensure that fire 3.2.6, 4.9, 5.2, AC See Section 3.3.2 doors are electrically supervised or 5.13 otherwise maintained closed will be evaluated (1) All doors to enclosed rooms 5.2 C surrounding the control room should be automatically closed in the event of fire or maintained closed at times by administrative procedures.
(2) Fire doors in zone 72A of the 5.13 C radwaste building should be electrically supervised or otherwise maintained in the closed position.
- 35. Doors to the reactor feed pump turbine lube 3.2.6, 5.1 C Doors 208, 270, 283 and 285 oil reservoir will be evaluated to determine to the turbine lube oil the need to upgrade them to provide a 3-hour rooms are a label doors.
fire rating. Doors are not required to separate redundant safe shutdown methods. See Item 34.
Ventilation Equipment
- 36. Three portable air handling units will be 3.1.6(1), 4.4, 5.6 C One portable fan is provided for smoke removal. located on elevation 165 feet in turbine building just outside the south door of the control room. The other two fans are located in the turbine building on elevation 116 near rollup door 111.
FPP 3.3-10 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks
- 37. The license will verify that smoke can be 3.1.6(2), 4.4 C Fire brigade smoke removal capacity exhausted from a torus compartment fire for the torus compartments is to a suitable location as described in adequate.
procedures.
- 38. Battery room ventilation air flow system 3.1.6(3), 5.5 C will be upgraded to include exhaust air flow detector.
- 39. The necessity for modifying the ventilation 3.2.9, 5.2 C See Section 3.3.2 and in the control room complex by installing, Section 3.1.2, Item No. 65.
as necessary, manual or automatic closing devices for dampers will be evaluated.
Fire Barrier Penetration Seals
- 40. Mechanical seals will be evaluated and 3.1.7, 4.9, 5.6, 5.7, AC Refer to Section 3.2.2 upgraded as necessary. 5.8, 5.9, 5.12, 5.15 Item Nos. 38 and 39.
The computer room walls are 2-hour rated and sealed (refer to Sections 3.1.2, Item 21 and 3.2.2, Items 37, 38, and 39). The diesel fire pump room walls are 2-hour rated to provide fire resistance between the pump room and fire area 48-144.
- 41. Barriers separating fire areas have fire 4.11 AC Penetrations through fire resistance ratings of two or three hours, barriers provide the adequate to contain the postulated fire required fire resistance within the fire area. in accordance with the requirements of Appendix R to 10CFR50. See Section 3.2.2, Items 38 and 39 and Section 3.1.2, Item 21 for details.
- 42. The practicality of sealing the open pipe 3.2.8, 5.14 NC See Section 3.3.2.
penetrations separating zones 4B from 4C and 12B from 12C will be investigated.
FPP 3.3-11 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks Air Breathing Equipment
- 43. A total of 38 self-contained breathing units 4.4.3 AC Scott 4.5 self contained breathing (Chemox masks) are provided throughout the plant. Apparatus (SCBA) packs are provided.
Each Chemox mask is provided with two cartridges; Spare cylinders are maintained such each cartridge has a service life of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. that at least two cylinders are provided for each SCBA pack.
- 44. A supply of 72 extra canisters for the 3.1.8, 4.4 AC Replaced by Scott 4.5 Chemox masks will be provided at a central packs which are location for an extra 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> breathing equivalent to capacity for 12 people. Chemox masks.
- 45. Self-contained breathing units are located in 5.2.4 C Scott 4.5 packs at the turbine building just outside each of the locations 165-38 entrances to the main control room. and 165-50.
- 46. Two Chemox breathing masks are located 5.15.4 AC Two Scott 4.5 packs at the northeast corner of the diesel at location Y-8, the generator building. northeast corner of the diesel generator building.
- 47. The need to provide fixed emergency lighting 3.2.14, 4.6 C See Section 3.3.2 and consisting of fixed sealed beam units with Section 5.2.
individual battery power supplies for access to and egress from the control room, the cable spreading room, the emergency switchgear and battery rooms, and the ground floor below via stairway No. 9 will be evaluated.
- 48. Twenty-two portable battery-powered 3.1.9, 4.6 C A minimum of 22 handheld lights handheld lights will be provided. are stored in an emergency equipment cabinet just outside the entrance to the main control room at the head of stairway 9.
FPP 3.3-12 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks Fire Detection and Signaling Systems 49 A fire detection and signaling system is provided 4.2 C See Section 2.12 in various portions of the plant which transmits and Section 3.3.2.
alarm and supervisory signals to the control room where they are annunciated at the fire panel. In addition to handling fire detector signals, the system transmits indications of water flow from the sprinkler and deluge extinguishing systems, as well as the status of pump mode and system pressure. The system also indicated operation of the carbon dioxide extinguishing systems and in all cases indicates the zone from which the alarm or supervisory signal initiated. Supervisory alarm signals are displayed at the fire alarm panel in the control room and show the location of the affected area in the event of loss of power, under voltage, short or open circuits, or ground faults. Powers is supplied from the emergency AC power system.
- 50. Each area monitored by detectors is provided with 4.2 AC Accurate for smoke a local control panel incorporating a "power on", detectors only. Heat pilot light and a key operated "reset" switch. detectors are not During the site visit, it was noted that some monitored by control of the pilot lights were not illuminated or panels but by automatic were very dim. The licensee will restore these code transmitters lamps to their original intensity. which do not have a "power on" light or a key operated "reset" switch, but are supervised. In addition, the 13 kV Switchgear Preaction Sprinkler System release control panel does not utilize a key operated reset switch.(exception:
The H2 Water Chemistry System backup leak detection heat detectors are not tied to an automatic code transmitter and are not supervised).
Control of combustibles
- 51. A curb or doorsill will be installed to 3.1.11(1), 4.5, 5.15 C See Section 3.3.2.
prevent the flow of combustible liquids under the doors between the individual diesel generator rooms at the 127-foot elevation.
- 52. The curb around the hydrogen seal oil unit 3.1.11(2), 4.5, 5.1 C See Section 3.3.2, will be upgraded. Item No. 59.
FPP 3.3-13 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks
- 53. The motor-generator set oil pump room drains 3.1.11(3), 4.5 C See Section 3.3.2, will be plugged, separated, or provided with Item No. 59.
backwater valves to prevent an oil pathway via the motor-generator set room drainage system.
- 54. The health physics cleaning and repair 3.1.11(4), 5.13 C operations for breathing equipment will be permanently relocated from the 116-foot elevation corridor of the radwaste building.
- 55. A curb will be added at the door of the 3.1.11(5), 4.5, 5.16 C See Section 3.3.2, diesel fire pump room. A fusible link Item No. 59.
shutoff valve or high temperature shutoff switch to the fuel transfer pump will be provided to limit the flow of diesel fuel into the diesel fire pump room during a fire.
- 56. Curbs for the reactor feed pump turbine 3.1.11(6), 4.5, 5.1 C lube oil reservoir at the 135-foot elevation will be raised to contain the full contents of the reservoir and a 20-minute sprinkler flow.
- 57. Metal cabinets will be provided for storage 3.1.11(7), 5.1 C of protective clothing or the clothing will be relocated from elevation 116 feet of the turbine building.
- 58. Flammable liquid cabinets will be 3.1.11(8), 5.1 C provided in laboratories.
- 59. The need for modification will be 3.2.10, 4.5, C See Section 3.3.2.
evaluated to control the spread of 5.1, 5.14 combustibles in :
(1) Reactor feed pump turbine lube oil Reservoir rooms (2) Diesel fire pump room (3) Main turbine lube oil storage tank room (4) Recirculation pump motor-generator set room and motor-generator set oil equipment rooms FPP 3.3-14 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks
- 60. The curb for the drummed oil storage room is 5.1 C adequate.
- 61. The dikes in the main turbine lube oil storage 5.1 C tank rooms should be upgraded to contain the full contents of all tanks in the room plus the quantity of fire suppression water needed to suppress a postulated fire.
Verification should be provided that an oil fire in this room will not spread to other areas via the floor drains out-side the existing curb.
- 62. The turbine lube oil equipment areas at 4.5 C elevation 135 feet and the hydrogen seal oil units at elevation 116 feet of the turbine building are drained by individual drain lines with no branch connections.
- 63. The drains from the individual diesel generator 4.5 C rooms are located two feet above the common header and each drain line is provided with a backwater valve to prevent the spread of combustible liquids between rooms in the diesel generator building.
reservoir rooms floor drainage system should be modified, if necessary, to prevent the spread of oil outside the room via the drains.
- 65. The diesel fire pump room floor drains should 4.5 WC The need to isolate be modified, if necessary, to prevent the floor drains in the spread of fuel oil outside the room via the diesel fire pump room drains. is being investigated.
Yard Hydrants FPP 3.3-15 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks
- 66. The hydrant in the middle of the west side 3.1.12(1), 4.3 C will be rotated to allow both hose connections to be used (4.3).
- 67. The environmental station pipe will be 3.1.12(2), 4.3 C There are no interferences relocated or the licensee will take other that prevent the hydrant corrective measures to provide adequate wrenches from being clearance for use of the hydrant wrench. rotated.
- 68. The need to provide two double female 3.2.15, 4.3.1 C Adapters are stored on adapters for use by a fire department turbine deck elevation pumper in pumping fire water directly 165 feet, Unit 2.
from the inlet pond to a hydrant will be evaluated. These fittings should be stored in a central location.
- 69. Exterior fire hydrants are installed 4.3.1(3) AC Hydrants with curb valves are around the plant at approximately installed, in general, at design 250-foot intervals with the maximum intervals of approximately 250 spacing between hydrants of 290 feet. Feet with a 290-foot maximum.
See Section 3.3.2.
- 70. The hydrant hose threads are compatible with 4.3.1(3) C the local fire department.
- 71. The hydrant located at the southeast corner of 4.3.1(3) C the turbine building that was found to be leaking will be repaired.
Water Systems
- 72. Water for fire protection is obtained directly 4.3.1(1) C from Conowingo Pond, a body of water formed by dams across the Susquehanna River. The water is drawn in through a screen structure and then to the intake structure through isolable ponds.
- 73. A secondary source of water can be obtained by 4.3.1(1) C taking suction from the inlet pond by a fire department pumper and discharging through hose lines connected to a hydrant.
FPP 3.3-16 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks
- 74. Two vertical shaft, centrifugal fire 4.3.1(2) C The two fire pumps are vertical, open line pumps, each with a design capacity of 2,500 shaft, turbine, wet pit type fire pumps, gallons per minute (gpm), at a pressure of each rated for a maximum of 2,500 gpm 125 pounds per square inch gauge (psig), are at 125 psig total head.
provided. One of the fire pumps is diesel engine driven with a base-mounted 120-gallon day tank adequate for approximately 4.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> of running time.
- 75. Both fire pumps can be started from the control 4.3.1(2) C room or at the intake structure by means of the Underwriters Laboratory listed fire pump controllers.
Yard Piping
- 76. Separate 12-inch supply lines to the 12-inch 4.3.1(3) C The connection points of the fire pumps underground yard main encircling the supply lines with the yard main system plant are provided from each of the are approximately 24 feet apart.
fire pumps. The connection points of these supply lines with the yard main system are approximately 10 feet apart with a post indicator valve between.
- 77. Post indicator type sectionalizing valves are 4.3.1(3) C strategically located along the yard main in order to minimize the effects of a pipe break.
Hose Cart Houses
- 78. An additional hose cart will be installed 3.1.13, 4.3, 5.18, C See Section 3.3.2.
in the yard west of the reactor building. 3.2.13 This cart and the existing hose carts will contain as a minimum:
(1) 150 feet of 2-1/2-inch hose (2) Two 75-foot lengths of 1-1/2-inch hose (3) One gated wye having a female 2-1/2-inch inlet and two 1-1/2-inch male outlets (4) Two 1-1/2-inch and one 2-1/2-inch adjustable spray nozzles FPP 3.3-17 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks (5) Hydrant and hose coupling spanner wrenches (6) One 1-1/2-inch hydrant gate valve
- 79. The need for a forcible entry tool to be 3.2.11, 4.3 AC See Section 3.3.2.
provided in each hose cart will be evaluated.
- 80. The need to provide two hose houses 3.2.13, 4.3 AC See Section 3.3.2.
at the east side of the plant at the hydrants nearest the northeast and southeast corners of the turbine building will be evaluated.
Hydrostatic Testing of Hoses
- 81. The need to hydrostatically test all hose 3.2.12, 4.3 AC See Section 3.3.2.
stored in outside hose cart houses annually at a pressure 50 psi above maximum service pressure will be evaluated.
Administrative Controls/Procedures Implement appropriate procedures to ensure that:
- 82. Hose houses will be maintained free of ice 3.1.14(1), 4.3 C A-30, "Plant Housekeeping and snow that might hinder access; Controls," requires that the plant assistant maintenance engineer ensure the hose houses remain free of ice.
- 83. Each hydrant will have the caps removed, 3.1.14(2), 4.3 C threads lubricated, and barrel checked in the fall of each year;
- 84. Procedures are developed for the use of 3.1.14(3), 4.4 C portable smoke removal equipment;
- 85. Pilot and alarm lights for detectors are 3.1.14(4), 4.2 C properly illuminated at control panels; FPP 3.3-18 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks
- 86. Fire doors are inspected semiannually to 3.1.14(5), 4.9, C see Item No. 34.
verify self-closing mechanisms and latches 5.15 are in proper working order;
- 87. A stepladder will be provided in the control 3.1.14(6), 5.2 C room to provide access to the space above the suspended ceiling;
- 88. Unnecessary combustibles are not stored in 3.1.14(7), 5.2 C the control room complex;
- 89. Prefire strategy plans include manual trip 3.1.14(8), 5.15 C Plant fire procedure of the auxiliary boiler fuel oil transfer provides for manually pump tripping the auxiliary boiler fuel oil transfer pumps.
- 90. Clarification will be provided to 3.1.14(9), 6.0 C Refer to Appendix C, demonstrate compliance of the licensee's reference 6.
administrative controls with staff guidelines or justification for deviations will be provided.
Fire Water System Valve Supervision
- 91. Chains and locks will be provided on all 3.1.15, 4.3, C Administrative controls nonoperating valves controlling the flow 5.18 have been implemented.
of fire water, and administrative controls TRM 3.14.1.5.
will be instituted to provide assurance that the fire protection valves are maintained in the appropriate position.
Operating valves such as gate valves for deluge control and main discharge valves will be electrically supervised.
Diesel Fuel Tank Fill Connection
- 92. The area around the diesel fire pump fuel 3.1.16, 5.18 C oil storage tank fill connection will be regraded to prevent a fire involving spilled fuel from affecting the circulating water pumphouse.
FPP 3.3-19 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos. Comparison Remarks Safe Shutdown Analysis
- 93. A safe shutdown analysis was performed by 3.2.1, 4.1 C Refer to Chapter 5 for assuming a design basis fire in each fire safe shutdown analysis.
zone and that all equipment within that zone as well as all equipment whose cabling passed through that zone was disabled.
The analysis did not address the capability to achieve and maintain both hot and cold shutdown and did not consider the effects of loss of offsite power on shutdown capability. A reevaluation of this analysis will be performed which includes these staff-identified assumptions.
Cable Separation Criteria
- 94. The adequacy of redundant division cable 3.2.2, 4.10 NA The cable separation separation will be evaluated for protection criteria described in this against fire. section are no longer a concern. Appendix R requirements are more severe. See Item No. 93 which takes precedence.
- 95. The need for modifications will be evaluated 3.2.2, 5.2 NA Refer to Appendix C, to insure that no single panel in the control reference 6.
room contains redundant equipment without a solid fire barrier.
Gas Suppression System
- 96. The practicality and need for automatic 3.2.5, 4.3, C See Section 3.3.2.
actuation of the carbon dioxide system 5.3 in the cable spreading room will be evaluated.
(1) The computer room is protected by a 4.3.2, 5.3 AC manually actuated carbon dioxide system FPP 3.3-20 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos Comparison Remarks (2) The cable spreading room is protected 4.3.2, 5.3 AC Cable Spreading Room is a manually with a manually actuated carbon actuated system, see Item 96.
dioxide system which can be manually actuated.
- 98. A fixed manually actuated total flooding 4.3.2, 5.1.5 C carbon dioxide system is provided in each diesel generator room.
- 99. The HPCI pump rooms, fire zones 59 and 62, 4.3.2, 5.12 AC Both HPCI Pump Room CO2 Systems are are provided with carbon dioxide extinguishing manually actuated, see Item 99.
systems automatically activated by heat detectors.
100. Two carbon dioxide hose reels are mounted in 4.3.2, 5.2 AC Portable fire north and south ends of the main control extinguishers are provided room. These hose reels contain sufficient in the control room. See hose (100 feet each) to reach all areas of the Section 3.1.2, Items 35 control room that contain electrical equipment. and 65.
101. Two carbon dioxide hose reels are located C in the turbine building at the high pressure turbine bearing lube oil pumps.
Fixed Foam Systems 102. The auxiliary boiler's fuel oil tank is 4.3.1(6) & 5.18 C protected by a fixed foam system. The auxiliary boiler building houses the foam system controls and is provided with a hose reel connected to the foam system supply.
Effects of Suppression Systems on Safety Systems 103. Water flows from automatic suppression are 4.3.1(7) AC See Section 3.3.2.
annunciated on the fire panel in the control room.
FPP 3.3-21 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos Comparison Remarks 104. Inadvertent fire protection system actuation 4.3.1(7) C Refer to Chapter 5 that may result in damage to safety-related for discussion of equipment. inadvertent actuation.
105. Valves have been provided to isolate sections 4.3.1(7) C of fire protection system piping inside buildings to preclude the buildup of water and thus prevent equipment from being incapacitated due to flooding.
106. Flows from manual hose stations are not 4.3.1(7) C annunciated, but they will cause the fire pump to start, thereby transmitting a "fire pump running" signal to the control room.
Instrument Nitrogen 107. In addition to the redundancy and separation of 4.1.15 NA The fire protection modifications the service air and instrument nitrogen described in this section are systems, modifications to the fire protection no longer applicable. Appendix R system will provide further assurance requirements are more severe.
that either instrument air or nitrogen will Instrument nitrogen supplies be available if required for shutdown. required for safe shutdown are analyzed per FPP Section 5.1. See UFSAR Section 10.17 for additional details.
108. Following the implementation of the modifications 7.0 C Changes to the technical of fire protection systems resulting from this specifications to incor-review, the Technical Specifications will be porate modifications as similarly modified to incorporate the limiting a result of the SER were conditions for operation and surveillance approved 6/16/82.
requirements for these modifications.
Communications 109. Six portable two-way radio units will be 3.1.10, 4.7 C procured for use of the fire brigade.
Electric Cables 110. The power and control cables used at 4.8 AC See Section 3.1.2, Peach Bottom are capable of passing Item No. 24.
FPP 3.3-22 REV. 21, APRIL 2017
PBAPS FPP Section 3.3.1 (Cont'd)
Item No. SER Section Requirement SER Section Nos Comparison Remarks 111. Less than 0.3 percent (by volume) of the cables 4.8 C in all the safeguard trays are PVC-jacketed.
Control Room Modification 112. Carpeting may be installed in the control SER of 10/10/85 AC Installed floor finishes in the Main Control Room room. Carpeting will have a critical meet the requirements of a Class I interior floor radiant flux equal to 1.01 watts per finish as defined by NFPA 101-1985 (see reference 3 square centimeter (ASTM E-648) and of Appendix C).
therefore will be considered a Class I interior finish and will have a smoke development rating of less than 250 (ASTM E-662).
FPP 3.3-23 REV. 21, APRIL 2017
PBAPS FPP 3.3.2 Explanatory Notes for Comparison to Safety Evaluation Report Commitments Item No. 1 Ionization type fire detectors were installed to provide detection in the areas listed below which were not previously protected (original plant design). The general criteria used in designing the detection systems and the specific factors considered for each included: combustible loading, ventilation characteristics, and room size, geometry, and congestion. All areas listed below were evaluated for conformance with NFPA 72E.
- 1. Residual heat removal pump rooms
- 2. Reactor core isolation cooling pump rooms
- 3. Core spray pump rooms
- 4. Deleted
- 5. Enclosed rooms within the control room complex (room nos. 422, 424, 425, 427, and 428)
- 6. Cable spreading room
- 7. Diesel generator rooms
- 8. Diesel generator auxiliary room
- 9. High pressure service water pump room to replace the existing heat detectors
- 10. Battery rooms For the cable spreading room, the 25 ionization type fire detectors were provided in addition to the two existing ones. The cabling used for control and power circuits at Peach Bottom consists of cross-linked polyethylene insulation with a flame retardant neoprene jacket equal to cable construction capable of passing IEEE-383-1974. Because of the inherent fire resistance of the cabling, it is expected that an electrically initiated fire in the cabling will not propagate and involve large quantities of adjacent cabling although an exposure fire involving transient combustible materials could.
The fire detection system in each diesel generator room is provided with nine rate compensation heat detectors. The fire detectors provide adequate protection in accordance with NFPA 72E which is the industry-accepted standard for fire detection. A FPP 3.3-24 REV. 21, APRIL 2017
PBAPS FPP fire involving diesel fuel would produce a fast developing, high heat output fire that would be detected quickly by the heat detectors.
The neutron monitoring equipment rooms, fire zones 6S-20 and 13S-30, do not contain safe shutdown components and therefore do not require fire detection per Section III.F of Appendix R. Refer to Appendix C, reference 6.
See Item No. 3 below for discussion of differences between NFPA 72E and installed detectors.
Item No. 2 The area above the control room suspended ceiling contains 26 cables trays. None of these 26 cable trays are safety related.
Of the 26 cable trays, 23 contain only cable that is of flame retardant construction. The remaining three cable trays contain only instrumentation cable consisting of polyethylene and PVC insulation and jacketing. Based on this, the three cable trays containing cabling that is not fire retardant have been covered with a fire retardant coating. Therefore, no need exists for the installation of early warning fire detectors in the space above the suspended ceiling of the control room. However, line-type heat detectors were installed in all trays above the control room ceiling.
The control room panels are internally divided into sub-compartments in such a manner to provide segregation of the two primary shutdown systems. Therefore, a panel fire cannot result in the loss of shutdown capability. The panel partitions are sufficient to withstand the heat flux that could be generated by the combustible loading within the panel. In addition, continuous manning of the control room assures prompt detection and suppression of control room fires. For these reasons, fire detection within the control room panel does not appear to be required by the provisions of Appendix R,Section III.F. Refer to Appendix C, reference 6.
As indicated in reference 6 of Appendix C, only two smoke detectors were installed on the refueling floor (which includes the spent fuel pool) in the vicinity of the only safety-related system, the ventilation stack radiation monitoring station. The ventilation stack monitoring stations were removed from the refuel floor. The associated smoke detectors were also removed since there was no other safety related equipment in the area.
Item No. 3 FPP 3.3-25 REV. 21, APRIL 2017
PBAPS FPP An operational and calibration test has been performed on each detector following installation to ensure its design sensitivity.
All fire detector installations were reviewed in 1985 by a qualified fire protection engineer. See also Item Nos. 1, 2, and 5 of this section.
In the diesel fire pump room a heat detector is located at the bottom of a beam greater than 18 inches from the ceiling. Beams are also greater than 8 feet on centers. The heat detector is located closer to the recognized fire hazard and in confined areas such that pockets will not prevent the heat detector from sensing a fire. A fire would also be fast developing. An automatic, wet pipe sprinkler system is provided to extinguish a fire.
The heat detector in the diesel fire pump room is located sufficiently remote from a diesel exhaust pipe. No problems caused by heat from the exhaust pipe actuating the detector have been experienced to date.
Detectors in the plant computer room are not located in every bay formed by ceiling beams that are greater than 18 inches deep and greater than 8 feet on centers. Although some smoke from a localized fire could collect in the beam pockets initially, the small size of the room and the proximity of the detectors to all combustibles will ensure there is not a significant delay in detection because of beam pockets. In addition, the ventilation system will tend to mix the air and smoke in the room.
In the turbine building laydown area on elevation 165 feet, the detector has been placed over the recognized fire hazard (the turbine bearing lube oil lift pumps), approximately 8 feet above the floor rather than near the ceiling due to the height of the ceiling.
Item No. 4 A remote indicator panel has been installed outside the cable spreading room. Each smoke detector in the cable spreading room has a lamp on the panel to indicate detector actuation.
Item No. 5 On the refueling floor, total area protection was not provided due to the minimal combustible loading and the presence of only one safety-related radiation monitoring panel. The safety-related panel was provided with a cabinet detector. The radiation monitoring panel and the smoke detection associated with it has been removed from the refuel floor.
Item No. 7 FPP 3.3-26 REV. 21, APRIL 2017
PBAPS FPP A water suppression, pre-action sprinkler system having a design density of 0.3 gpm/sqft was installed over the diked area of the recirculation pump motor generator set lube oil pump rooms. The system is actuated by either of two smoke detectors located over each diked area. The detectors activate the pre-action water spray system flow control valve and the automatic code transmitter via the local smoke detector control panel. A pressure switch is installed to indicate water flow. Heat is required to activate the fusible sprinkler heads. Manual arming of the pre-action system from outside the recirculation pump motor generator set lube oil pump rooms is possible.
ECR 13-00338 removes the pre-action sprinkler system installed over the Unit 3 MG Set Lube Oil Pumps. The Unit 3 MG Set lube oil pumps have been abandoned in place with oil removed. Existing smoke detection which alarms the Main Control Room remains in the room. Water flow and low nitrogen pressure alarms are disabled with removal of the sprinkler system.
A wet-pipe automatic sprinkler system with a design density of approximately 0.20 gpm/sq. ft. was installed to cover the radwaste drummed waste/storage area. Operation of the system will annunciate an alarm via the station fire alarm system.
In the Unit 2 reactor building component cooling water room, a pump motor and electrical junction box may be hit by spray from the sprinkler heads. Considering all available sprinklers, the pattern of the spray covers the hazard, and the electric motors are enclosed and insulated, and the junction boxes are of watertight construction so that electrical arcing and water intrusion should not occur. In the Unit 2 reactor building component cooling water rooms sprinkler heads are more than 16 inches below the ceiling. The maximum head drop specified in NFPA-13 is based on area-wide combustion and does not consider the effects of localized combustion. Where this condition occurs, the sprinkler heads have been lowered to provide more direct spray on a local concentration of combustibles, and fusible links will be melted by rising heat from the fire and not the stratification of hot air near the ceiling. The sprinkler heads are also spaced more than 6 feet from the wall, but this is acceptable since the oil is confined by a dike and the sprinklers are within 6 feet of the dike. Sprinkler heads have been provided around the trash compactor and baling area and satisfy the spacing requirements of NFPA-13 to cover the specific fire hazard. Where ducts and other obstructions could interfere with the spray distribution, the interference has been minimized and care was taken to place supplementary sprinkler heads below the ducts. Sprinkler heads with threaded connections are located at low points in this area and can be removed to provide system drainage if required.
FPP 3.3-27 REV. 21, APRIL 2017
PBAPS FPP Item No. 9 The likelihood of an explosion in the recombiner building has been addressed in the response to IE Bulletin 78-03 and in reference 8 of Appendix C, in response to staff position PF-42. In addition, NUREG-0442 indicates that an explosion in the off-gas system would not result in an unacceptable release of radiation. The probability of an external fire affecting the recombiner building charcoal filters and exhaust ventilation fans is remote. The equipment is enclosed in a masonry and concrete room with no combustibles present. Ducts passing through the walls are provided with fire dampers, and the charcoal filters are protected by automatic deluge water spray systems. Hose stations and portable extinguishers are also provided in the area. Excessive radiation conditions will initiate an alarm in the control room which will be immediately investigated. Based on this, no additional fire protection provisions in the recombiner building are necessary.
The M-G set fluid drives contain approximately 1,100 gallons of hydraulic fluid. Dikes were placed around the fluid pipes and within the M-G set rooms to contain any hydraulic fluid associated with a pipe rupture or leak. The Unit 2 M-G set room has a full area pre-action sprinkler system. The Unit 3 M-G set room has a pre-action sprinkler system located over the M-G itself. The pre-action sprinkler systems are actuated by the existing ionization type smoke detection located above the M-G sets. Action of both the smoke detection and the pre-action sprinkler system transmits an alarm signal in the control room.
The Unit 3 MG Set has been abandoned in place per ECR 13-00338 and the oil has been drained. However, the sprinkler system remains.
Item No. 18 In the turbine generator equipment areas, sprinkler heads have been located over control/alarm panels, motor control centers, equipment motors, and other electrical equipment that could be hit by spray from the sprinkler heads. The pattern of the spray considering all available sprinklers covers the fire hazard, and the electrical equipment is either enclosed in appropriate NEMA enclosure or insulated so electrical arcing due to water intrusion should not occur. Adequate room coverage has been provided in rooms 228 and 229, even though some sprinkler heads are further from the walls than is recommended by Section 4-5.4 of NFPA 13, since the major source of combustibles is not concentrated near the walls and is covered by other sprinkler heads. Some sprinkler heads in room 274 are located less than 4 inches from the wall; however, the existing clearance is adequate for removal and FPP 3.3-28 REV. 21, APRIL 2017
PBAPS FPP maintenance of the sprinkler heads. In rooms 124, 135, and 228, sprinkler heads with threaded connections are located at low points and can be removed to provide system drainage if required.
Even though sprinkler heads in room 228 are more than 16 inches below the ceiling, they are immediately below the beams and not more than 20 inches below a noncombustible ceiling, except for one sprinkler head which is located 36 inches below the ceiling in order to provide adequate coverage below enclosed electrical junction boxes.
Item No. 20 Hose stations are equipped with 100 feet of hose. Hose reel carts are provided on elevations 165 feet and 195 feet of each reactor building which are equipped with 200 feet of hose capable of reaching elevations 180 feet and 214 feet. From adjacent hose stations, a 100-foot length of hose will be able to reach all areas of rooms 100, 101, 158, and 159 and will be able to direct a stream of water down through the steel grating floor on all areas of rooms 2, 3, 40, and 41. The stream will cool the rooms, thereby controlling the fire. Portable extinguishers may be needed for final extinguishment. Additional hose is provided to ensure that all areas of the drywell can be reached from the personnel access hatches on elevation 135 feet.
Item No. 24 Portable fire extinguishers are mounted in the pump rooms adjacent to the torus compartment. Considering the low combustible levels, accessibility of the cables, and fire retardant characteristic of the cable insulation, more than sufficient fire protection capabilities presently exist. There is sufficient hose length (300 feet) outside the torus compartment from hose stations HS-116-12 and HS-116-56 such that water coverage of this area will be ensured. In addition hose can be attached to hose stations HS-116-19, HS-116-21, HS-116-47, HS-116-49, HS-135-19, and HS-135-57.
Item No. 25 All of the Peach Bottom hose stations are equipped with Alfco nozzles. All hose nozzles are Alfco spray nozzles except for the nozzles at the following hose stations in the turbine buildings:
HS-165-14 Alfco all fog nozzles HS-165-72 Alfco all fog nozzles HS-150-2 Alfco all fog nozzles HS-150-19 Alfco all fog nozzles HS-135-5 Alfco super fog nozzles FPP 3.3-29 REV. 21, APRIL 2017
PBAPS FPP The Alfco fog nozzle represents the best industrial type nozzle available for use and is safer than a variable gallonage nozzle.
Many years of experience with the Alfco fog nozzle have proven it to be very effective in fighting many types of fires. A ball type shutoff valve has been added to each hose nozzle.
Item No. 27 Nine clean agent portable extinguishers were installed in the control room proper, not in the peripheral rooms. The clean agent extinguishers have a class A rating, the same as water extinguishers and, therefore, provide the same protection as the required water extinguishers. In addition, the clean agent extinguishers greatly reduce the safety hazard present with water extinguishers when the water impinges on energized electrical equipment which may not be directly involved in the fire. This information was transmitted for staff review in reference 7 of Appendix C.
Item No. 33 The condensate pump room doors were upgraded by removing the existing louvers, filling the gap with kaowool insulation, and mounting steel plates on both sides of the door over the openings for support. This was accepted by the NRC in Supplement No. 2 of the SER.
Item No. 34 The existing doors designated as fire doors are certified by Underwriters Laboratories as having a 3-hour fire rating. All fire doors at the plant had been electrically supervised except for 29 doors. The following actions were taken for upgrading the status of the 29 unsupervised doors:
- 1. Installing self-closing mechanism on the four conventional fire doors lacking this equipment.
- 2. Providing administration controls to maintain doors in the closed position with the exception of door 230, between the west common stairwell (no. 34) and the contaminated fresh storage area, and door 233, between the turbine building and the radwaste building, which were provided with self-closing mechanisms or are electrically supervised.
- 3. Posting all 29 fire doors listed with signs stating: "Fire Door - Keep Closed."
- 4. Providing instructions to maintain fire doors in the closed position except when required to accommodate the movement FPP 3.3-30 REV. 21, APRIL 2017
PBAPS FPP of personnel and equipment. Instructions will be provided in the General Employee Training Program and administrative procedures.
- 5. Inspecting fire doors semiannually to verify that self-closing mechanism and latches are in good working order.
By reference 5 of Appendix C, this commitment in the SER was superseded as follows: "Fire doors will be provided in fire barriers which protect redundant divisions of safety-related systems required to ensure safe shutdown capability in the event of a fire. Fire door surveillance will be performed in accordance with the provisions of 10CFR50, Appendix R, Section III.N."
Two doors, door no. 305 in the entrance to the Unit 2 M-G set vent supply fan room (fire area 27) and door no. 356 in the entrance to the Unit 3 M-G set vent supply fan room (fire area 26) were not purchased to UL requirements; however, each door and frame construction is equal to that of labeled doors and provides adequate fire resistance for the equivalent severity of the combustible loading on either side of the door, zero minutes on the M-G set vent supply fan room side and 41 minutes on the remote shutdown panel area side of the door. This information was previously provided in reference 11, Appendix C.
Fire door assemblies located in safe shutdown fire barriers provide fire resistance required by the barrier in accordance with the requirements by the barrier in accordance with the requirements of Appendix R to 10CFR50. The door assemblies were evaluated against the recommendations presented in UL Inspection Report NC972, 85NK28895. Modifications were performed where required to ensure that the assemblies provide the required fire resistance.
Two door assemblies in the entrance to the cable spreading room, door Nos. 284 and 286 include fire dampers directly above the doors to provide ventilation and vent to C02 during actuation of the C02 suppression system. A fire hazards analysis has concluded that these assemblies provide the required fire resistance.
Item No. 39 In the event of a fire in the control room complex, the control HVAC can be changed over to 100 percent exhaust to the outside and clear the control room of smoke. The control room complex ventilation system can be manually isolated to prevent smoke from entering the area as a result of fires in other areas of the plant. Early warning fire detectors have been provided in the peripheral rooms. Openings in walls separating the main control room and peripheral rooms have been closed. All doors to enclosed FPP 3.3-31 REV. 21, APRIL 2017
PBAPS FPP rooms within the control room complex have been provided with self-closing mechanisms.
In the event a fire in the control room complex forced an evacuation of the main control room, the plant can be safely shut down. Refer to Chapter 5 for the safe shutdown analysis.
Item No. 42 The floor between fire zones 2-4B and 4-4C is sealed to provide 3-hour fire resistance for separation required by Appendix R but is not required to be a flood barrier and was therefore not sealed for watertightness as stated in Supplement No. 2 of the SER.
Since the floor between fire zones 2-12B and 2-12C is not required to separate redundant safe shutdown methods, penetration seals were not upgraded. Safe shutdown is assured. Refer to Chapter 5 for a description of safe shutdown.
Item No. 47 The control room, cable spreading room, switchgear rooms, battery rooms, and stairway no. 9 are provided with emergency ac lighting, emergency dc lighting, or both, in addition to the normal lighting system.
Item No. 49 A fire detection signal for the detection of Hydrogen Water Chemistry hydrogen fire in any of the hydrogen shrouds located in Fire Area 50-Fire Zone 78A signals the HWC PLC and the PLC provides an output signal to the Fire Protection Annunciation Board 00C201 via the Fire Protection Equipment Panel 00C001. The intent of the hydrogen heat fire detectors is to provide a back-up source for hydrogen leak detection in the shrouds. These hydrogen heat detectors are not area detectors and do not activate any sprinkler or deluge extinguishing systems. These heat detectors are an integral part of the HWC control scheme which prevents hydrogen flow in the case of a leak.
Item No. 51 The curb to prevent the flow of combustible liquids under the doors between the diesel generator rooms is fabricated of 1.5-inch steel angle with appropriate caulking for oil retention.
Item No. 59 Curbing was provided at the door of the diesel fire pump room.
The curbing is of sufficient height to contain the volume of the diesel fuel day tank and a suitable sprinkler flow. The installed FPP 3.3-32 REV. 21, APRIL 2017
PBAPS FPP curbing will confine an oil spill to this room and prevent a potential fire from affecting safe shutdown. A high temperature shutoff switch has been installed to stop the flow of diesel fuel oil in the event of a fire in the compartment.
The main turbine lube oil storage tank rooms area is protected by a sprinkler system. The existing dikes meet the recommendations of NFPA 30. Therefore, the volumetric capacity of the diked area is not less than the greatest amount of liquid that can be released from the largest tank within the diked area, assuming a full tank.
Dikes were provided around the motor-generator set fluid drives to contain any hydraulic fluid associated with a pipe rupture or leak. A pre-action water spray system was installed, with directional nozzles, to protect the diked area.
The Unit 3 MG Set has been abandoned in place per ECR 13-00338 and the oil has been drained. However, the sprinkler system remains.
Item No. 64 The floor drains from each reactor feed pump turbine lube oil reservoir room each flow into separate 55-gallon drums. The discharge lines each contain a normally closed gate valve before discharging into the 55-gallon drums. Therefore, any oil leakage will be confined to reservoir rooms.
Item No. 69 Fire hydrant H-8 was originally installed in the northwest corner of the plant but was removed in 1971 to accommodate installation of a condensate storage tank and was never reinstalled. The distance between the two hydrants on either side of where hydrant H-8 used to be is 430 feet. An analysis performed in 1982 indicated that 300-foot sections of hose from the two adjacent hydrants could provide coverage for the area that would have been protected by hose connected to hydrant H-8 except for the area northeast of the access road in the back of the plant. This area contains no equipment or structures and is not used for storage.
Since no combustibles or ignition sources are present, the likelihood of a fire occurring is negligible. A safety evaluation was written in 1982 addressing this concern.
Item Nos. 78 and 80 There are hose carts located at the north, south, and southeast areas adjacent to the turbine building. An additional hose cart was provided in the yard west of the reactor building. Each cart house contains all the additional equipment recommended.
FPP 3.3-33 REV. 21, APRIL 2017
PBAPS FPP Item No. 78 Cart house and hose cart were installed but 2-1/2-inch adjustable spray nozzles were replaced with Alfco nozzles with ball valve shutoff. The following items were included in addition to those required by SER Section 3.3.1.
- 1. An additional 150 feet of 2-1/2-inch hose
- 2. 400 feet of 1-1/2-inch hose on a reel
- 3. One 2-1/2-inch hydrant gate valve
- 4. One 2-1/2-inch fog nozzle
- 5. One 1-1/2-inch fog nozzle Item No. 79 Forcible entry tools are stored on each of the fire hose carts.
To minimize any potential security concerns, administrative procedures direct that security personnel should report directly to the location of the fire alarm.
Item No. 81 Per Technical Requirements Manual, hoses will be tested annually at a pressure of 50 psi above the maximum operating pressure but not less than 150 psig.
Item No. 96 The CO2 system in the cable spreading room was changed to manual actuation, and the applicable provisions of NFPA 12 were followed.
See ECR 06-00435.
Item No. 99 The CO2 system in the HPCI Pump Rooms was changed to manual actuation per ECR 04-00077 and 04-00078.
Item No. 103 Water flows from hose stations are not annunciated. Use of a hose station will cause the pressure in the yard main to drop below 140 psig at which point the transmitted signal will automatically cause the electric fire pump to start. Pump running lights in the control room will alert the control room operators. Also when gas is released from the dry pipe systems, the decrease in pressure will cause annunciation in the control room. The fire brigade FPP 3.3-34 REV. 21, APRIL 2017
PBAPS FPP will then determine if the sprinkler system should be manually actuated to extinguish the fire.
FPP 3.3-35 REV. 21, APRIL 2017
PBAPS FPP CHAPTER 4 EVALUATION OF POTENTIAL FIRE HAZARDS 4.1 SCOPE OF EVALUATION This chapter provides an evaluation of the potential for occurrence of fires within the plant and a summary of the capabilities of the existing fire protection program. This evaluation was performed for all structures that contain safety-related equipment or could affect safety-related structures by virtue of the fire hazards present.
A review of the plant was made to identify the combustible materials present, quantify the fire hazard in terms of combustible loading, and relate the potential hazard to the capabilities of the existing fire barriers and fire suppression systems. This information is presented in Table A-1 which lists the type of combustible materials present in each fire zone, the corresponding combustible loading, and the availability of detection and suppression equipment. Figures B-4 through B-13 show the locations of the fire zones, fire barriers, and fire suppression coverage.
4.2 PROCEDURE The evaluation of fire hazards was performed using a procedure that is summarized by the following steps:
- a. For identification purposes, the various structures of the plant were divided into specific fire areas. A fire area is defined as that portion of a structure that is separated from other areas by boundaries (walls, floors, and ceilings) which are of a type of construction which is sufficient to prevent the spread of fire across the boundary, considering the combustible loading in the area. Many fire areas were further subdivided into fire zones to permit more precise identification of the locations of combustible materials, fire detection and suppression systems, and components associated with safety-related systems. The breakdown into fire zones was based on the location of interior walls and slabs with each fire area. Fire areas are identified by a unique number, and fire zones within the same fire area are identified by a subnumber-letter. The fire area and fire zone designations are listed in Table A-1 under "Area/Zone."
FPP 4.1-1 REV. 16, APRIL 2007
- b. Each fire zone was surveyed to determine the type, quantity, and distribution of combustible materials present.
- c. The combustible loading for each fire zone was determined based on the quantity of combustible materials present and the heat of combustion of each type of combustible material. The heat of combustion values used in this analysis are listed in Table A-2.
The quantity of each type of combustible material (unit) was multiplied by the appropriate heat of combustion (in BTU unit) to determine the heat release (in BTU) of each type of combustible material. The total heat release of all combustibles in the fire zone was then calculated by adding the heat release of each combustible material. To obtain the combustible loading (in BTU/ft²) for each fire zone, the total heat release (in BTU) was divided by the floor area of the fire zone. An additional 400 BTU/ft2 was added to each fire area to encompass incidental combustibles.
- d. The methodology for calculating fire severity (hours) is based on information presented in the 17th edition of the NFPA Handbook. The methodology uses the relationship between the calculated fire load in an area and an exposure to a fire severity which is equivalent to the standard time - temperature curve which is used as the exposure fire in fire resistance rating tests (ASTM E-119). The steps involved in calculating fire severity are as follows:
- 1. Calculate the fire load (BTU/ft2) for an area as stated within the methodology.
- 2. Divide the calculated fire load by 80,000 BTU/ft2 hr to obtain fire severity:
Fire Load BTU/ft2 Fire Severity
=
80,000 BTU/ft2hr
- e. The classification of the fire loading in a zone is based on the results of fire loading studies performed by the British (contained in the 17th edition of the Fire Protection Handbook). The results of the study show that the loading in an occupancy can be classified as low, moderate, or high, defined by the fire loading (BTU/ft2) of the occupancy. The classifications are defined as follows:
FPP 4.1-2 REV. 16, APRIL 2007
PBAPS FPP Low - The fire load of a zone is classified as low if it does not exceed an average of 60,000 BTU/ft2 of floor area. This loading corresponds to a fire severity of 45 minutes using the standard time temperature curve (ASTM E-119). Classification of fire load in a fire zone or area as low identifies the zone as having a fire severity below that which could be expected to be contained within a 1-hr fire rated enclosure.
Moderate - The fire load of a zone is classified as moderate if it exceeds an average of 60,000 BTU/ft2 but does not exceed an average of 140,000 BTU/ft2 of floor area. This loading corresponds to a fire severity of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, 45 minutes using the standard time temperature curve. Classification of fire load in a fire zone or area as moderate identifies the zone as having a fire severity below that which could be expected to be contained within a 2-hr fire rated enclosure.
High - The fire load of a zone is classified as high if it exceeds an average of 140,000 BTU/ft2 of floor area. This loading corresponds to a fire severity in excess of 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, 45 minutes using the standard time temperature curve.
FPP 4.1-3 REV. 16, APRIL 2007
PBAPS FPP CHAPTER 5 ANALYSIS OF CAPABILITY TO ACHIEVE SAFE SHUTDOWN 5.1 METHODOLOGY This chapter provides an evaluation of the effects of postulated fires in each fire area and the ability of the operator to achieve a safe shutdown of the plant. Of the numerous possible combinations of equipment that could be used to affect a safe shutdown, four combinations were selected for detailed study for the purposes of this evaluation. These four shutdown methods are described in Section 5.2 In performing the safe shutdown analysis, the four shutdown methods were examined to determine the minimum equipment, control, and power requirements for operability of each method. The locations of the equipment itself and the cabling associated with the required equipment were identified with respect to the various fire areas.
Each fire area was then reviewed to determine which components associated with the shutdown methods, if any, may be rendered inoperable by the occurrence of a fire within the fire area. The results of the safe shutdown analysis are summarized in Section 5.3 for each fire area.
The following assumptions were used in performing the safe shutdown analysis:
- a. Both reactor units are assumed to be operating normally at 100 percent power prior to the fire. All equipment in the plant is available for operation prior to the onset of the fire.
- b. Offsite Power Availability
- 1. No credit is taken for loss of offsite power in situations for which a loss of offsite power would be advantageous.
- 2. For safe shutdown, as described in 10CFR50, Appendix R, III.G.2, offsite power is assumed to be lost unless it can be demonstrated that it is unaffected by the fire. If offsite power is lost, it is assumed to be unavailable during the first 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> after the onset of the fire.
- 3. For alternative shutdown, as described in 10CFR50, Appendix R, III.G.3 and III.L, offsite power is FPP 5.1-1 REV. 16, APRIL 2007
PBAPS FPP assumed to be unavailable during the first 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> after the onset of the fire.
- c. Plant accidents and severe natural phenomena are not considered to occur concurrently with a postulated fire or during the subsequent recovery period.
- d. Single active component failures other than those failures directly attributable to fire-caused damage are not assumed to occur.
- e. The potential consequences of fire-caused damage to electrical cabling are assumed to include circuit failures such as open circuits, short circuits, hot shorts, and shorts to ground. The evaluation of spurious component operation that may result from these circuit failures is limited by the following assumptions:
(1) Only one circuit failure per system resulting in spurious operation of a component other than a high/low pressure interface valve may occur per system due to a postulated fire in any given fire area.
(2) Two or more circuit failures resulting in spurious operation of two or more valves in series at a high/low pressure interface may occur due to a postulated fire in any given fire area.
- f. Credit is taken for reactor trip. Any fire affecting the reactor protection system or the control rod drive circuitry will not prevent the reactor from being tripped. A reactor trip can be performed manually (in the control room), automatically (by the RPS logic), or by tripping the RPS power supplies.
- g. No credit is taken for manual fire fighting efforts in limiting the spread of a postulated fire within a fire area. The fire is assumed to disable all equipment and damage all electrical cabling located in the fire area, unless the fire hazard analysis demonstrates otherwise.
Additionally, any damage caused by the fire fighting or by inadvertent actuation of fixed fire suppression systems is bounded by the damage assumed to be caused by the fire.
FPP 5.1-2 REV. 16, APRIL 2007
- h. Manual operation of devices such as valves, circuit breakers, and hand switches may be used by operations personnel in exercising control over shutdown systems, provided that the devices are in accessible locations and staffing levels are adequate to support such actions. The number of plant operators available is assumed to be limited to the minimum number of operators that are required by the Technical Requirements Manual
- i. Credit is taken for the capability to close the MSIVs, if required by the event. Any fire affecting the MSIV circuitry will not prevent the valves from closing.
Valve closure can be performed manually (in the control room), automatically (by containment isolation signals), or by tripping the air supply or power supplies for the MSIVs solenoid valves.
FPP 5.1-3 REV. 16, APRIL 2007
5.2 DESCRIPTION
OF REACTOR SHUTDOWN METHODS The following sections provide descriptions of methods that can be used for reactor shutdown and cooldown. Although the safe shutdown analysis for the various fire areas places primary emphasis on achievement of reactor shutdown using the methods described below, other means of achieving shutdown might be available. Use of safety-related and nonsafety-related systems not addressed in the safe shutdown analysis, plus manual operation of certain equipment and controls, could provide numerous combinations of systems with adequate capability to safely shut the plant down.
5.2.1 Reactor Shutdown With Balance of Plant Cooling Systems Available After the turbine-generator has been tripped and all control rods inserted into the reactor core during the course of a normal shutdown and cooldown, reactor decay heat and sensible heat is removed by bypassing main steam to the condenser. Heat is removed from the condenser by the circulating water system and rejected to the atmosphere by the cooling towers. Makeup water is supplied to the reactor vessel by the condensate and feedwater system, taking suction on the condenser hotwell. When the reactor has been depressurized below a nominal 75 psig, the RHR system is initiated in the normal shutdown cooling mode of operation. In this mode, reactor water is circulated through the RHR heat exchangers, where it is cooled by the HPSW system. Heat is rejected to the environment by discharging water from the HPSW system to the river.
The reactor vent valves are opened when reactor pressure reaches atmospheric.
If malfunctions due to the effects of a fire occur in any of the systems that are normally used to achieve reactor shutdown with balance of plant cooling systems available, one of the shutdown methods described in Section 5.2.2 will be used to complete the shutdown.
5.2.2 Reactor Shutdown Without Balance of Plant Cooling Systems Available For the purpose of this safe shutdown analysis, four methods of shutdown that are operable without balance of plant cooling systems available were selected for detailed study. Each of the four shutdown methods includes systems and components necessary to accomplish the major functions of (a) providing makeup water to the reactor vessel, (b) depressurizing the reactor vessel, and (c) removing decay heat and sensible heat from the reactor and primary FPP 5.2-1 REV. 21, APRIL 2017
PBAPS FPP containment. Without offsite power, cold shutdown is achieved using the alternate shutdown cooling mode, which minimizes the equipment required for obtaining cold shutdown. This mode precludes depressurizing the reactor to atmospheric pressure, since the reactor pressure must be maintained above the minimum closing pressure of the relief valves. Although the reactor is not vented (see reference 24 in Appendix C), adequate decay heat removal capability is available, to assure that the reactor coolant temperature can be maintained below 212°F. The systems in each shutdown method that are directly relied on for accomplishing these functions are as follows:
Shutdown Depres-Method Makeup surization Heat Removal A RCIC RVs RHR in the suppression pool cooling mode; and RHR or Core Spray in the alternate shutdown cooling mode B HPCI RVs RHR in the suppression pool cooling mode; and RHR or Core Spray in the alternate shutdown cooling mode C RHR in the RVs RHR in the suppression LPCI mode pool cooling mode; and RHR OR or Core Spray in the core spray alternate shutdown cooling mode D HPCI RVs RHR in the suppression pool cooling and alternate shutdown cooling modes (alternative shutdown)
The individual components that are used for safe shutdown are listed in Table A-3, together with their corresponding fire area locations and safe shutdown system(s). The safe shutdown analysis was performed from a function/system standpoint, as opposed to a safeguard channel standpoint. Functions and support functions were not restricted to the same safeguard channel as the system used to provide reactor inventory. Therefore, some components are associated with only one shutdown method, while most components are associated with all four shutdown methods. Although these components FPP 5.2-2 REV. 21, APRIL 2017
PBAPS FPP are associated with all four methods, they are not necessarily required to be available for all cases in which a given shutdown method is relied on, depending on the location of the postulated fire. This flexibility exists because of the redundancies that have been provided at the system and component levels.
The following sections identify the methods used for safe shutdown in each fire area. In those areas where more than one method of safe shutdown is available, the preferred priority of shutdown methodology is A, then B, and then C. Only the first listed method is needed for safe shutdown capability.
A description of each of the four shutdown methods is provided below.
Method A After closure of the main steam isolation valves, pressure in the reactor vessel is limited by operation of the relief valves which open in the mechanical relief mode when their pressure setpoints are reached. The steam discharged through the relief valves is condensed in the suppression pool. Water level in the reactor is maintained by the RCIC system, using the condensate storage tank, supplemented by the refueling water storage tank, as the source of water supply. The operation of the RCIC system also removes energy from the reactor in the form of steam used to drive the RCIC turbine. In order to limit the temperature rise of the suppression pool due to the steam discharged into it from the RCIC system and the relief valves, one loop of the RHR system is operated in the suppression pool cooling mode. In this mode, water from the suppression pool is circulated through an RHR heat exchanger and then returned to the suppression pool.
In order to initiate operation of the alternate shutdown cooling mode, it is necessary to depressurize the reactor below a nominal pressure of 150 psia. This is accomplished with the relief valves, in the manually controlled mode, to discharge steam to the suppression pool. After the reactor pressure has been stabilized between 150 and 100 psia, the alternate shutdown cooling mode can be placed into operation. This mode of operation is defined slightly differently depending on whether the RHR system or the core spray system is used to provide coolant makeup to the reactor vessel. If the RHR system is being used to provide coolant makeup, the RHR flow path downstream of the heat exchanger is realigned so that water is discharged into the reactor vessel (via the recirculation loop) as well as into the suppression pool, to maintain rated flow through the RHR heat exchanger. This allows one FPP 5.2-3 REV. 21, APRIL 2017
PBAPS FPP loop of the RHR system to provide makeup to the vessel in the alternate shutdown cooling mode and also provide suppression pool cooling. Water from the reactor vessel is returned to the suppression pool by maintaining one or more of the relief valves in the open position. If the core spray system is being used to provide makeup to the reactor vessel, the operating loop of the RHR system must remain in the suppression pool cooling mode for decay heat removal. Prior to initiating alternate shutdown cooling, the RCIC turbine is tripped, and the water level in the reactor vessel is increased to the main steam line nozzles, allowing water to fill the main steam lines and then flow through the open relief valves and down the relief valve discharge lines to the suppression pool.
In both the suppression pool cooling mode and the alternate shutdown cooling mode, the heat is transferred from the RHR system to the HPSW system via the RHR heat exchanger. The HPSW system provides the means for dissipating decay heat from the reactor, to maintain it in a cold shutdown condition.
Depending on the location of a fire within the plant, certain operations that are used in shutdown method A may need to be performed manually from outside of the control room. The specific operations involved are identified in Table A-4. Emergency lighting with at least an 8-hour battery power supply has been provided in all areas needed for operation of safe shutdown equipment and access and egress routes thereto. Portable handheld lighting is provided for illumination of access routes between the powerblock and outside buildings.
Method B After closure of the main steam isolation valves, pressure in the reactor vessel is limited by operation of the relief valves, which open in the mechanical relief mode when their pressure setpoints are reached.
The steam discharged through the relief valves is condensed in the suppression pool. Water level in the reactor is maintained by the HPCI system, using the condensate storage tank, supplemented by the refueling water storage tank, as the source of water supply. The operation of the HPCI system also removes energy from the reactor in the form of steam used to drive the HPCI turbine. In order to limit the temperature rise of the suppression pool due to the steam discharged into it from the HPCI system and the relief valves, one loop of the RHR system is operated in the suppression pool cooling mode. In this mode, water from the suppression pool is circulated FPP 5.2-4 REV. 21, APRIL 2017
PBAPS FPP through an RHR heat exchanger and then returned to the suppression pool.
In order to initiate operation of the alternate shutdown cooling mode, it is necessary to depressurize the reactor below a nominal pressure of 150 psia. This is accomplished with the relief valves, in the manually controlled mode, to discharge steam to the suppression pool. After the reactor pressure has been stabilized between 150 and 100 psia (to avoid prematurely tripping the HPCI turbine due to low steam supply pressure), the alternate shutdown cooling mode can be placed into operation. This mode of operation is defined slightly differently depending on whether the RHR system or the core spray system is used to provide coolant makeup to the reactor vessel. If the RHR system is being used to provide coolant makeup, the RHR flow path downstream of the heat exchanger is realigned so that water is discharged into the reactor vessel (via the recirculation loop) as well as into the suppression pool, to maintain rated flow through the RHR heat exchanger. This allows one loop of the RHR system to provide makeup to the vessel in the alternate shutdown cooling mode and also provide suppression pool cooling. Water from the reactor vessel is returned to the suppression pool by maintaining one or more of the relief valves in the open position. If the core spray system is being used to provide makeup to the reactor vessel, the operating loop of the RHR system must remain in the suppression pool cooling mode for decay heat removal. Prior to initiating alternate shutdown cooling, the HPCI turbine is tripped, and the water level in the reactor vessel is increased to the main steam line nozzles, allowing water to fill the main steam lines and then flow through the open relief valves and down the relief valve discharge lines to the suppression pool.
In both the suppression pool cooling mode and the alternate shutdown cooling mode, heat is transferred from the RHR system to the HPSW system via the RHR heat exchanger. The HPSW system provides the means for dissipating decay heat from the reactor, to maintain it in a cold shutdown condition.
Depending on the location of a fire within the plant, certain operations that are used in shutdown method B may need to be performed manually from outside of the control room. The specific operations involved are identified in Table A-4. Emergency lighting with at least an 8-hour battery power supply has been provided in all areas needed for operation of safe shutdown equipment and access and egress routes thereto. Portable handheld lighting is provided for illumination of access routes between the powerblock and outside buildings.
FPP 5.2-5 REV. 21, APRIL 2017
PBAPS FPP Method C If neither the RCIC system nor the HPCI system is available to maintain the water level in the reactor vessel, method C is relied on to shut the plant down. This method involves depressurizing the reactor vessel sufficiently so that either the RHR system or the core spray system can inject water into the vessel.
After closure of the main steam isolation valves, pressure in the reactor vessel is limited by operation of the relief valves, which open in the mechanical relief mode when their pressure setpoints are reached. The steam discharged through the relief valves is condensed in the suppression pool. The reactor vessel is depressurized by using three or more relief valves, in the manually controlled mode, to discharge steam to the suppression pool.
Coolant injection to the reactor vessel cannot be initiated until vessel pressure has been reduced below the pressure interlock setpoint of the coolant makeup system (core spray or RHR) and below the pump shutoff head of the system. The pressure interlock setpoint is 450 psig for both systems. The pump will start injecting when reactor pressure is 295 psig for the LPCI mode of the RHR system and 289 psig for the core spray system. If the RHR system is used for providing coolant makeup, one loop of the system is placed in the LPCI mode of operation. If the core spray system is to be used for providing coolant makeup, one loop of the system is placed in operation, using either or both of the pumps in that loop.
Depressurization of the reactor vessel during the period before coolant makeup becomes available will cause a decrease in reactor water level. Although the upper portion of the reactor core may be uncovered briefly during this transient, the effect of steam cooling in the core region will limit the fuel cladding temperatures to acceptable values. Therefore, no fuel damage will result from the temporary uncovering of the core.
When the reactor has been depressurized below a nominal pressure of 150 psia, the alternate shutdown cooling mode can be placed into operation. This mode of operation is defined slightly differently depending on whether the RHR system or the core spray system is used to provide coolant makeup to the reactor vessel. In both cases, however, the reactor water level is raised above the main steam line nozzles, allowing water to fill the main steam lines and then flow through the open relief valves and down the relief valve discharge lines to the suppression pool. This establishes a complete loop for liquid flow from the suppression pool to the reactor vessel and back FPP 5.2-6 REV. 21, APRIL 2017
PBAPS FPP to the suppression pool. Reactor pressure is maintained by opening or closing relief valves as necessary.
If the RHR system is being used to provide coolant makeup to the reactor vessel, HPSW flow must be established to the RHR heat exchanger in the operating loop. In addition, the RHR flow path downstream of the RHR heat exchanger is realigned so that water is discharged into the suppression pool as well as into the reactor vessel, to maintain rated flow through the RHR heat exchanger. This allows one loop of the RHR system to provide makeup to the vessel in the alternate shutdown cooling mode and also provide suppression pool cooling. If the core spray system is being used to provide coolant makeup to the reactor vessel, one loop of the RHR system must be placed in the suppression pool cooling mode, and HPSW flow must be established to the RHR heat exchanger in that loop. In either case, heat from the water in the suppression pool is transferred to the HPSW system. The HPSW system provides the means for dissipating decay heat from the reactor, to maintain it in a cold shutdown condition.
Depending on the location of a fire within the plant, certain operations that are used in shutdown method C may need to be performed manually from outside of the control room. The specific operations involved are identified in Table A-4. Emergency lighting with at least an 8-hour battery power supply has been provided in all areas needed for operation of safe shutdown equipment and access and egress routes thereto. Portable handheld lighting is provided for illumination of access routes between the powerblock and outside buildings.
Method D A fire occurring in the control room, the cable spreading room, the computer room, or the emergency shutdown panel area has the potential to prevent safe shutdown from the control room.
Therefore, alternative shutdown capability has been provided to ensure that safe shutdown can be achieved in the event of a fire in any of these four zones. Alternative shutdown is referred to as shutdown method D and relies on the use of four types of alternative control stations. Each alternative control station (ACS) includes transfer/isolation switches than can be used to transfer control of the safe shutdown components from the control room to the control switches located on the ACS. The transfer/isolation switches also provide electric circuit isolation between alternative shutdown circuits and circuits that could be affected by a fire in one of the four areas of concern.
FPP 5.2-7 REV. 21, APRIL 2017
PBAPS FPP The four types of alternative control stations are described as follows:
- a. HPCI Alternative Control Stations There is a HPCI alternative control station for each unit, located in the recirculation pump M-G set room of each unit at elevation 135 feet of the radwaste building. The following features are located on the HPCI ACS:
(1) Control switches, transfer/isolation switches, and a flow controller for the HPCI system.
(2) Control switches and transfer/isolation switches for one loop of the RHR and HPSW systems. The B loop of RHR and HPSW is used for Unit 2. The D loop of RHR and HPSW is used for Unit 3.
(3) Diagnostic instrumentation for the HPCI, RHR, HPSW, and ESW systems.
(4) Reactor process monitoring instrumentation.
(5) Control switches for two relief valves (A and B).
- b. Emergency Switchgear Alternative Control Stations There are two switchgear alternative control stations for each unit. The stations are located in the B and D 4 kV emergency switchgear rooms, at switchgear units 20A16 and 20A18 for Unit 2 and at switchgear units 30A16 and 30A18 for Unit 3. The following ACS features are located on the front panels of the respective switchgear cubicles:
(1) Transfer/isolation switches and control switches for the diesel generator circuit breakers (safeguard channels B and D).
(2) Transfer/isolation switches and control switches for the load center circuit breakers (safe guard channels B and D).
(3) Transfer/isolation switch and control switch for the 2B and 3D RHR pumps (safeguard channels 2B and 3D, respectively).
FPP 5.2-8 REV. 21, APRIL 2017
PBAPS FPP (4) Transfer/isolation switch and control switch for the 2B and 3D HPSW pumps (safeguard channels 2B and 3D, respectively).
(5) Transfer/isolation switch and control switch for the A ESW pump (Unit 2 only).
- c. Diesel Generator Alternative Control Stations Alternative control stations are provided for the B and D diesel generators. Since the diesel generators are common to both units, the alternative control stations for the diesel generators are also common to both units. The ACS for the B diesel generator is located in the Unit 2 B 4 kV emergency switchgear room. The ACS for the D diesel generator is located in the Unit 2 D 4 kV emergency switchgear room. Each ACS includes transfer/isolation switches and provides means for manually controlling diesel start, diesel stop, voltage adjustment, and governor speed adjustment.
- d. Automatic Depressurization System (Relief Valve)
Alternative Control Stations There are two ADS alternative control stations for each unit each consisting of two panels. The stations are located in the A and B 4 kV emergency switchgear rooms.
The following features are located on the alternative control stations:
(1) Transfer/isolation switches for two relief valves (A and B) that isolate potentially damaged circuits and transfer control of these valves to the HPCI ACS.
Isolation switches for 3 relief valves (E, H, and J) that isolate potentially damaged circuits.
(2) An isolation switch for one relief valve (K) that isolates potentially damaged circuits from the control room.
Isolation switches for 5 relief valves (C, D, F, G, and L) that isolate potentially damaged circuits.
(3) A transfer/isolation switch for the Unit 3 RHR B Loop cross-tie valve that isolates potentially damaged circuits from the control room and transfers control of this valve to the Unit 3 RHR ACS.
FPP 5.2-9 REV. 21, APRIL 2017
PBAPS FPP When the decision has been made to shut the plant down from outside the control room because of a fire in either the control room, cable spreading room, computer room, or emergency shutdown panel area, the operators will scram the reactor and close the main steam isolation valves before leaving the control room. The operators will then proceed to the various alternative control stations and operate the transfer/isolation switches to take manual control of the systems needed for achieving safe shutdown.
After closure of the main steam isolation valves, pressure in the reactor vessel is limited by operation of the relief valves, which open in the mechanical relief mode when their pressure setpoints are reached. The steam discharged through the relief valves is condensed in the suppression pool. Water level in the reactor is maintained by the HPCI system, using the condensate storage tank, supplemented by the refueling water storage tank, as the source of water supply. The operation of the HPCI system also removes energy from the reactor in the form of steam used to drive the HPCI turbine. In order to limit the temperature rise of the suppression pool due to the steam discharged into it from the HPCI system and the relief valves, one loop of the RHR system is operated in the suppression pool cooling mode. In this mode, water from the suppression pool is circulated through an RHR heat exchanger and then returned to the suppression pool.
In order to initiate operation of the alternate shutdown cooling mode of the RHR system, it is necessary to depressurize the reactor below a nominal pressure of 150 psia. This is accomplished by using the relief valves, in the manually controlled mode, to discharge steam to the suppression pool. After the reactor pressure has been stabilized between 150 and 100 psia (to avoid prematurely tripping of the HPCI turbine due to low steam supply pressure), the operating loop of the RHR system is switched from the suppression pool cooling mode to the alternate shutdown cooling mode. This is accomplished by realigning the flow path downstream of the RHR heat exchanger so that water is discharged into the reactor vessel (via the recirculation loop) as well as into the suppression pool, to maintain rated flow through the RHR heat exchanger. This allows one loop of the RHR system to provide makeup to the vessel in the alternate shutdown cooling mode and also provide suppression pool cooling. Water from the reactor vessel is returned to the suppression pool by maintaining one or more of the relief valves in the open position. The water level in the reactor vessel rises to the main steam line nozzles, allowing water to fill the main steam FPP 5.2-10 REV. 21, APRIL 2017
PBAPS FPP lines and then flow through the open relief valves and down the relief valve discharge lines to the suppression pool.
Once the alternate shutdown cooling mode has been placed into operation, the HPCI system is shut down.
In both the suppression pool cooling mode and the alternate shutdown cooling mode, heat is transferred from the RHR system to the HPSW system via the RHR heat exchanger. The HPSW system provides the means for dissipating decay heat from the reactor, to maintain it in a cold shutdown condition.
Emergency lighting with at least an 8-hour battery power supply has been provided in all areas needed for operation of safe shutdown equipment and access and egress routes thereto. Portable handheld lighting is provided for illumination of access routes between the powerblock and outside buildings.
The Alternative Control Stations are provided with station battery-backed lights. The batteries and their chargers are protected from a fire in the control room, the cable spreading room, the computer room, or the emergency shutdown panel area.
FPP 5.2-11 REV. 21, APRIL 2017
PBAPS FPP 5.3 SAFE SHUTDOWN ANALYSIS BY FIRE AREA 5.3.1 Fire Area 1: Unit 2 - A and C RHR Heat Exchanger and Pump Rooms (Elev. 91'-6" and 116'-0") Stairwell No. 26 (Elev. 135'-0" to 234'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr NE - Reinforced concrete 3-hr E - Reinforced concrete (part 3-hr adjacent to fire area 5)
E - Reinforced concrete (part 3-hr adjacent to fire area 6S)
E - Reinforced concrete (exterior wall) none S - Reinforced Concrete (exterior wall) none S - Reinforced concrete 3-hr (elev. 135'-0" and above)
W - Reinforced concrete (exterior wall) none W - Reinforced concrete (exterior wall, 2-hr elev. 135'-0" and above)
Floor: Reinforced concrete foundation mat none Ceiling: Reinforced concrete (part adjacent to none liquid nitrogen storage (LNS) building. Only fire area 1 is adjacent to the one LNS building at an unrated barrier.)
Reinforced concrete (RHR Room C) 3-hr Metal deck, nonreinforced concrete and none built-up roofing Access: Door connecting to fire area 5 Doors connecting to stairwell no. 26 (b) Major Components in Fire Area 2AE124 RHR Pump Seal Water Cooler HX 2AE24 RHR Heat Exchanger 2AV-25 RHR Pump Room Cooling Fan 2BV-25 RHR Pump Room Cooling Fan FPP 5.3-1 REV. 21, APRIL 2017
PBAPS FPP FT2-10-109A RHR Flow Transmitter M02-10-89A RHR HX Discharge Valve 2CE24 RHR Heat Exchanger 2CV25 RHR Pump Room Cooling Fan 2DV25 RHR Pump Room Cooling Fan DPT2-10-91A RHR Differential Pressure Transmitter M02-10-015C RHR Shutdown Cooling Suction Valve M02-10-89C RHR HX Discharge Valve 2AP35 RHR Pump A M02-10-013A LPCI Suction Isolation Valve M02-10-015A RHR Shutdown Cooling Suction Valve M02-10-016A RHR Pump Discharge Bypass Valve 2CE124 RHR Pump Seal Water Cooler HX 2CP35 RHR Pump C M02-10-013C LPSI Suction Isolation Valve M02-10-016C RHR Pump Discharge Bypass Valve AO-8098A RHR Sample Line Isolation Valve AO-8099A RHR Sample Line Isolation Valve AO-8098C RHR Sample Line Isolation Valve AO-8099C RHR Sample Line Isolation Valve PS2-10-120A RHR Auto Blowdown Interlock PS2-10-120C RHR Auto Blowdown Interlock PS2-10-120E RHR Auto Blowdown Interlock FPP 5.3-2 REV. 21, APRIL 2017
PBAPS FPP PS2-10-120G RHR Auto Blowdown Interlock (c) Postulated Fire in Area (1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is of the self-extinguishing type).
(2) Lube oil from RHR pumps motors either leaking onto the floor with subsequent ignition of the oil or an overheating of the pump causing ignition of the oil.
(3) Since no combustible material is located in stairwell no.
26, the origin of a postulated fire in the stairwell is indeterminate.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire in the RHR pump rooms will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 1 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods A, B, and C for Units 2 and 3 are related to equipment with redundant components not affected by a fire in this area.
Equipment located in this fire area that is associated with shutdown methods A, B, and C for Units 2 and 3 has redundant components that are not affected by a fire in this area.
Offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 1, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) An exemption from Appendix R,Section III.G.2 was requested and granted by the NRC in an SER dated December 31, 1986 regarding the structural steel supporting the fire barrier in the ceiling of the Unit 2 C RHR Room. Subsequent review has determined FPP 5.3-3 REV. 21, APRIL 2017
PBAPS FPP that the ceiling of this room does not form a fire area boundary for Appendix R compliance. Therefore, the portion of the exemption request for the ceiling of the Unit 2 C RHR pump room was unnecessary as documented in ECR 03-00604.
5.3.2 Fire Area 2: Unit 2 - B and D RHR Heat Exchanger and Pump Rooms (Elev. 91'-6" and 116'-0"). Unit 3 - A and C RHR Heat Exchanger and Pump Rooms (Elev. 91'-6" and 116'-
0"); Stairwell No. 25 (Elev. 91'-6" to 135'-0"). Units 2 and 3 - HPCI Pump Rooms, Reactor Sump Pump Rooms, RCIC Pump Areas (Elev. 88'-0"); Cooling Water Equipment Rooms (Elev. 116'-0"). Radwaste Building - Standby Gas Treatment Room, Waste Sludge Pump Room, Waste Sludge Tank Room, Floor Drain Collector Tank and Waste Collector Tank Room, Spent Resin Pump Room, Spent Resin Tank Room, Chemical Waste Tank Room, Collector Pump Room, Tank and Pump Area (Elev. 91'-6"); Waste Surge Tank Room (Elev. 108'-0");
Condensate Tank Rooms, Condensate Pump Rooms, Filter Holding Pump Room, Corridor, Laundry Room, Chemical and Funnel Storage, Demineralizer Room, Filter Rooms (Elev.
116'-0"); Medical Station, Radwaste Control Room, Filter Room, Personnel Decontamination Station, Radwaste Drummed Waste and Storage Area (Elev. 135'-0"); Hopper Compartments, Sample Tank and Pump Room, Radwaste H&V Equipment Compartment (Elev. 150'-0"); Centrifuges, Absorbent Feeder Rooms, Radwaste Exhaust Fan Rooms (Elev.
165'-0"); Stairwell No. 34 (Elev. 91'-6" to 165'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr NE - Reinforced concrete 3-hr E - Reinforced concrete 3-hr E - Reinforced concrete (part 2-hr adjacent to fire area 4)
SE - Reinforced concrete 3-hr S - Reinforced concrete 3-hr S - Reinforced concrete (part adjacent 2-hr to fire area 4)
W - Reinforced concrete none (exterior wall)
W - Reinforced concrete (part adjacent 3-hr to fire area 4)
FPP 5.3-4 REV. 21, APRIL 2017
PBAPS FPP W - Reinforced concrete (part adjacent 2-hr to fire zone 4-6)
Floor: Reinforced concrete foundation mat none Reinforced concrete (elev. 116'-0" none to 165'-0")
Ceiling: Reinforced concrete (elev. 91'-6" none to 135'-0")
Reinforced concrete (Unit 2 cooling water 3-hr equipment room, elev. 116'-0"; radwaste H&V equipment compartment, elev. 150'-0")
[Structural steel members adjacent to fire area 25, elev. 150'-0" will be coated with structural steel fire proofing.]
Metal deck, nonreinforced concrete and none built-up roofing Access: Two doors connecting to fire area 5 Doors connecting to stairwell Nos 24, 25, and 34 Two doors connecting to fire area 12 Four doors connecting to fire area 50 Door connecting to fire area 25 Door connecting to fire area 57 (b) Major Components in Fire Area 2BE124 RHR Heat Exchanger 2EV25 RHR Pump Room Cooling Fan 2FV25 RHR Pump Room Cooling Fan MO2-10-015B RHR Shutdown Cooling Suction Valve M02-10-89B RHR HX Discharge Valve TT-2442B Suppression Pool Temperature Transmitter 2DE124 RHR Pump Seal Water Cooler HX 2DE24 RHR Heat Exchanger 2GV25 RHR Pump Room Cooling Fan 2HV25 RHR Pump Room Cooling Fan FT2-10-109B RHR Flow Transmitter M02-10-89D RHR HX Discharge Valve 20D12 RCIC Motor Control Center MCC20B39 2D Motor Control Center M0-2972 ESW Header Isolation Valve PT-7465 ESW Pressure Transmitter 3AE24 RHR Heat Exchanger 3AV25 RHR Pump Room Cooling Fan FPP 5.3-5 REV. 21, APRIL 2017
PBAPS FPP 3BV25 RHR Pump Room Cooling Fan DPT3-10-91C RHR/HPSW Differential Pressure Transmitter FT3-10-109A RHR Flow Transmitter MO3-10-89A RHR HX Discharge Valve 3CE24 RHR Heat Exchanger 3CV25 RHR Pump Room Cooling Fan 3DV25 RHR Pump Room Cooling Fan MO3-10-015C RHR Shutdown Cooling Suction Valve MO3-10-89C RHR HX Discharge Valve TT-3442B Suppression Pool Temperature Transmitter 3OD12 RCIC Motor Control Center MCC30B36 3A Motor Control Center MO-3972 ESW Header Isolation Valve 00Y03 Distribution Panel 3AE124 RHR Pump Seal Water Cooler HX 3AP35 RHR Pump A MO3-10-013A LPCI Suction Isolation Valve MO3-10-015A RHR Shutdown Cooling Suction Valve MO3-10-016A RHR Pump Discharge Bypass 3CE124 RHR Pump Seal Water Cooler HX 3CP35 RHR Pump C MO3-10-013C LPCI Suction Isolation Valve MO3-10-016C RHR Pump Discharge Bypass 2BE124 RHR Pump Seal Water Cooler HX 2BP35 RHR Pump B LT-8123B Suppression Pool Water Level Transmitter MO2-10-013B LPSI Suction Isolation Valve MO2-10-016B RHR Pump Discharge Bypass Valve FT3-13-058 RCIC Pump Discharge Flow Transmitter FT3-23-082 HPCI Pump Discharge Flow Transmitter FT3-23-141 HPCI Flow Transmitter MO3-14-070 Torus Water Cleanup Suction Valve MO3-14-071 Torus Water Cleanup Suction Valve PS3-23-84-1 HPCI Pump Low Suction Pressure Alarm Switch PS3-23-97A HPCI Turbine Exhaust High Pressure Alarm Switch PS3-23-97B HPCI Turbine Exhaust High Pressure Alarm Switch PT3-23-142 HPCI Pump High Discharge Pressure Transmitter PT3-23-89 HPCI Steam Supply Pressure Transmitter 3AV22 RCIC Pump Room Cooling Fan 3BV22 RCIC Pump Room Cooling Fan 3OE32 RCIC Condenser 3OP46 RCIC Vacuum Pump FPP 5.3-6 REV. 21, APRIL 2017
PBAPS FPP 3OP48 RCIC Condensate Pump 3OS38 RCIC Turbine AO-3333A RCIC Pump Room Cooler HX Valve AO-3333B RCIC Pump Room Cooler HX Valve HO-5495 RCIC Turbine Stop Valve MO-5487 RCIC Turbine Trip and Throttle Valve MO3-13-018 RCIC Pump Suction From CST MO3-13-020 Outboard RCIC Discharge Isolation Valve MO3-13-027 RCIC Minimum Flow Bypass to Torus MO3-13-039 RCIC Pump Suction From Torus MO3-13-041 RCIC Pump Suction From Torus MO3-13-131 RCIC Steam to Turbine Isolation Valve MO3-13-132 RCIC Lube Oil Cooler Isolation Valve 3AV23 HPCI Pump Room Cooling Fan 30C873 HCPI Aux Relay Control Panel 3BV23 HPCI Pump Room Cooling Fan 30D41 HPCI Gland Seal CDSR Vacuum Pump Starter 3OK02 HPCI Vacuum Pump 30D43 HPCI Aux Lube Oil Pump Starter 3OP26 HPCI Auxiliary Lube Oil Pump 30D42 HPCI Gland Seal CDSR Cond Pump Starter 3OP28 HPCI Condensate Pump 30S676 HPCI Governor Control Box 3OS37 HPCI Turbine HO-5512 HPCI Turbine Control Valve HO-5513 HPCI Turbine Stop Valve MO3-23-014 HPCI Steam Line to Turbine MO3-23-017 HPCI Pump Suction From CST MO3-23-020 Outboard HPCI Pump Discharge Valve MO3-23-025 HPCI Minimum Recirc to Torus MO3-23-057 HPCP Pump Suction From Torus MO3-23-058 HPCI Pump Suction From Torus SPE-5505 HPCI Turbine Speed Transmitter SV3-23-054 Condenser Drain Pot Drain Valve 2DP35 RHR Pump D 2HE58 RHR Pump Room Cooler HX MO2-10-013D LPCI Suction Isolation Valve MO2-10-015D RHR Shutdown Cooling Suction Valve MO2-10-106D RHR Pump Discharge Bypass Valve 2AV23 HPCI Pump Room Cooling Fan 2BV23 HPCI Pump Room Cooling Fan 2OK02 HPCI Vacuum Pump 2OP26 HPCI Auxiliary Lube Oil Pump 2OP28 HPCI Condensate Pump 2OS37 HPCI Turbine AO-2334A HPCI Pump Room Cooler HX Valve AO-2334B HPCI Pump Room Cooler HX Valve FPP 5.3-7 REV. 21, APRIL 2017
PBAPS FPP HO-4512 HPCI Turbine Control Valve HO-4513 HPCI Turbine Stop Valve MO2-23-014 HPCI Steam Line to Turbine MO2-23-017 HPCI Pump Suction From CST MO2-23-020 Outboard HPCI Pump Discharge Valve MO2-23-025 HPCI Minimum Recirc to Torus MO2-23-057 HPCI Pump Suction From Torus MO2-23-058 HPCI Pump Suction From Torus SV2-23-054 Condenser Drain Pot Drain Valve 2AV22 RCIC Pump Room Cooling Fan 2BV22 RCIC Pump Room Cooling Fan 2OE32 RCIC Condenser 2OP46 RCIC Vacuum Pump 2OP48 RCIC Condensate Pump 2OS38 RCIC Turbine HO-4495 RCIC Turbine Stop Valve MO-4487 RCIC Turbine Trip and Trottle Valve MO2-13-018 RCIC Pump Suction From CST MO2-13-020 Outboard RCIC Discharge Isolation Valve MO2-13-027 RCIC Minimum Flow Bypass To Torus MO2-13-039 RCIC Pump Suction From Torus MO2-13-041 RCIC Pump Suction From Torus MO2-13-131 RCIC Steam To Turbine Isolation Valve MO2-13-132 RCIC Lube Oil Cooler Isolation Valve FT2-13-058 RCIC Pump Discharge Flow Transmitter FT2-23-082 HPCI Pump Discharge Flow Transmitter MO2-14-070 Torus Water Cleanup Suction Valve MO2-14-071 Torus Water Cleanup Suction Valve PT2-23-89 HPCI Steam Supply Pressure Transmitter SV-4960A CAD Analysis SV-4961A CAD Analysis O2E-4963A CAD Analysis H2E-4965A CAD Analysis FIT-4954 CAD Bleed AO-8098B Vent Stack Iodine Monitor AO-8099B RHR Sample Isolation AO-8098D Vent Stack Iodine Monitor AO-8099D RHR Sample Isolation PS2-10-120B RHR Auto Blowdown Interlock PS2-10-120D RHR Auto Blowdown Interlock PS2-10-120F RHR Auto Blowdown Interlock PS2-10-120H RHR Auto Blowdown Interlock PS3-10-120A RHR Auto Blowdown Interlock PS3-10-120C RHR Auto Blowdown Interlock PS3-10-120E RHR Auto Blowdown Interlock PS3-10-120G RHR Auto Blowdown Interlock AO-9098A Vent Stack Iodine Monitor FPP 5.3-8 REV. 21, APRIL 2017
PBAPS FPP AO-9099A RHR Sample Isolation AO-9098C Vent Stack Iodine Monitor AO-9099C RHR Sample Isolation FIT-5954 CAD Bleed H2E-5965A CAD Analysis O2E-5963A CAD Analysis SV-5960A CAD Analysis SV-59611 CAD Analysis MO2-10-174 RHR Service Water Crosstie MO2-10-176 RHR Service Water Crosstie DPIS2-10-121B RHR Pump Recirc Flow DPIS2-10-121D RHR Pump Recirc Flow DPIS3-10-121A RHR Pump Recirc Flow DPIS3-10-121B RHR Pump Recirc Flow DPIS3-10-121C RHR Pump Recirc Flow MO3-10-174 RHR Service Water Crosstie MO3-10-176 RHR Service Water Crosstie TE-5936A RCIC Steam Leak Detection TE-5936B RCIC Steam Leak Detection TE-5936C RCIC Steam Leak Detection TE-5936D RCIC Steam Leak Detection AO3-23-042 HPCI Steam Line Drain AO3-23-043 HPCI Steam Line Drain AO2-23-042 HPCI Steam Line Drain AO2-23-043 HPCI Steam Line Drain SV20469-1 HPCI Steam Line Drain SV20469-2 HPCI Steam Line Drain SV20470-1 HPCI Steam Line Drain SV20470-2 HPCI Steam Line Drain TE-4941A HPCI Steam Leak Detection TE-4941B HPCI Steam Leak Detection TE-4941C HPCI Steam Leak Detection TE-4941D HPCI Steam Leak Detection TE-4936A RCIC Steam Leak Detection TE-4936B RCIC Steam Leak Detection TE-4936C RCIC Steam Leak Detection TE-4936D RCIC Steam Leak Detection DPIS2-13-083 RCIC Steam Line Diff Press DPIS2-13-084 RCIC Steam Line Diff Press DPIS2-23-76 HPCI Steam Line Diff Press DPIS2-23-77 HPC Steam Line Diff Press PS2-23-84-1 HPCI Pump Suction Low Trip PS2-23-97A HPCI Pump Turbine Exhaust PS2-23-68B HPCI Pump Turbine Steam Press PS2-23-68C HPCI Pump Turbine Steam Press PS2-23-68D HPCI Pump Turbine Steam Press TE-5941A HPCI Steam Leak Detection FPP 5.3-9 REV. 21, APRIL 2017
PBAPS FPP TE-5941B HPCI Steam Leak Detection TE-5941C HPCI Steam Leak Detection TE-5941D HPCI Steam Leak Detection CV3-10-3677A RHR A Flow Control Valve CV3-10-3677C RHR C Flow Control Valve MO3-10-33452A RHR A/C Cross-Tie Isolation Valve 2AG020 Adjustable Speed Drive 2A 2BG020 Adjustable Speed Drive 2B (c) Postulated Fire in Area (1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is of the self-extinguishing type).
(2) Lube oil from Units 2 and 3- RHR pumps, HPCI pumps, RCIC pumps either leaking onto the floor with subsequent ignition of the oil or an overheating of the pumps causing ignition of the oil.
(3) Charcoal filters in the SGTS air plenum.
(4) Spent charcoal filters in filter room 238.
(5) Ignition of trash in the radwaste drummed waste and storage area from an external source.
(6) Ignition of paper in the radwaste control room from an external source.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation in the main control room. The smoke generated by a fire in the RHR pump rooms will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room. Smoke from a fire in the HPCI rooms will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room. The CO2 system can be manually actuated by the fire brigade in the RCIC room. Heat from a fire at the SGTS charcoal filters will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room. The deluge system is manually activated for the filter involved. A signal from any smoke detector in the Unit 2 Reactor Building cooling water equipment room will open a FPP 5.3-10 REV. 21, APRIL 2017
PBAPS FPP deluge valve, thus supplying water under pressure to closed sprinkler heads located above the M-G set lube oil pumps. A fire under the sprinkler system will melt the fusible link on the affected sprinkler heads at a predetermined temperature, causing the sprinkler heads to open and extinguish the fire.
The system can be manually actuated by the fire brigade to supply water to the sprinklers. The sprinkler system in the Unit 3 Reactor Building Cooling Water equipment room above the MG Set Lube Oil pumps has been removed per ECR 13-00338. A fire in the drummed waste and storage area of the radwaste building will melt the fusible link on the affected sprinkler heads at a predetermined temperature, causing the sprinkler heads to open.
Water from the wet pipe sprinkler system will flow out of the open head(s) to extinguish the fire. Flow of water through an alarm check valve will energize a flow switch that transmits an alarm to the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 2 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown method C for Units 2 and 3 are either encapsulated by a qualified fire barrier, related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown method C for Units 2 and 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 emergency auxiliary buses is not affected by a fire in this area. Offsite power to the 4kV switchgear via the 00A020 emergency auxiliary bus may be affected by a fire in this area.
Therefore, for a fire in Fire Area 2, shutdown method C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) In accordance with Generic Letter 86-10, a fire hazard analysis has been performed to demonstrate that the 10-gauge metal deck ceiling between areas 2 and 25 provides FPP 5.3-11 REV. 21, APRIL 2017
PBAPS FPP a fire resistance equivalent to that required by the barrier (see reference 10 in Appendix C and section 5.3.19(f)(8)). The analysis credits low combustible loading.
(2) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C and section 5.3.19.(f)(1))for a steel angle between fire areas 02 and 25. A 4 inch high by 1/4 inch thick steel angle traverses the top of the wall between the two fire areas for its entire length. The basis for the exemption was the fire barrier geometry and combustible loading.
(3) An exemption was granted from Section III.F of Appendix R by the NRC in the SER dated March 13, 1985, for lack of fire detection in the chemical waste tank room, elevation 91'-6". The only safety-related equipment in the room is cable in conduit. There are no fixed combustibles in the room, which is normally locked closed due to extremely high radiation levels.
(4) An exemption was granted by the NRC in an SER dated March 13, 1985, from Section III.G.2 of Appendix R to allow two 1.5-hour-rated fire dampers in series in lieu of one 3-hour damper in the south wall of the Unit 2 HPCI pump room. Early warning fire detection is provided. Combustible loading is low.
(5) An exemption from Section III.G.2 of Appendix R was granted by the NRC in the SER dated December 31, 1986, for the standby gas treatment system ductwork through 3-hour fire barriers without fire dampers. Inadvertent closure of dampers in two ducts through the north wall of the reactor sump pump room (fire zone 2-64) could jeopardize secondary containment capability in the event of a reactor building isolation. Combustible loading is low and chance of transmission of smoke through the ducts is low.
(6) An exemption was granted from Section III.G.2 of Appendix R by the NRC in the SER dated December 31, 1986, for a 1.5-hour-rated fire damper located outside a 3-hour barrier on each side of the wall in lieu of a 3-hour damper. The dampers were located outside the barrier in two ducts in the east wall of fire zone 2-61. The duct is FPP 5.3-12 REV. 21, APRIL 2017
PBAPS FPP manufactured from schedule 40 steel. Combustible loading on each side of the barrier is low.
(7) An exemption from the requirements of Section III.G.2 of Appendix R was granted by the NRC in an SER dated December 31, 1986 (see reference 18 in Appendix C and section 5.3.19.(f)(5)), for heating and ventilation ducts passing through a fire barrier without a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rated fire damper. The ducts penetrate the west wall of the remote shutdown panel area duct chase, elevation 150'-0" and the radwaste building heating and ventilating compartment. The installation of a damper in either of the ducts would potentially contaminate clean radiological areas and expose workers to unacceptable radiation hazards. Combustible loading in the area is low with most of the combustibles associated with cable tray near the ceiling of the remote shutdown panel area.
(8) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in the SER dated December 31, 1986, for protecting structural steel forming a part of or supporting fire barriers to provide fire resistance equivalent to that required of the barrier for both the Units 2 and 3 HPCI rooms, fire zone 2-59 and 2-62, respectively. The automatic CO2 system in each room will ensure that a fire is controlled quickly. However, there is no structural steel in the HPCI room that supports a fire area boundary. Therefore, an exemption is no longer necessary and the automatic CO2 system is not needed to support the exemption.
(9) An evaluation was done for the bus duct penetrating the wall between fire areas 02 and 57. The evaluation determined that the barrier is adequate for the fire hazard. The basis credits low combustible loading.
(10) ECR-NCR 99-02669 addresses the acceptability of a 1.5 hour5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> rated fire door in the stairwell barrier that separates the M-G set room (fire area 58) from Stair tower 25 (fire area 2). The acceptability is based in part on the normal use of 1.5 rated doors in stair towers.
(11) ECR 04-00077 and 04-00078 address the change of the HPCI Pump Room CO2 fire suppression systems from automatic to manual initiation. These ECRs include a technical FPP 5.3-13 REV. 21, APRIL 2017
PBAPS FPP evaluation that provides the justification for this change.
(12) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated January 30, 2009. This exemption approved post fire operator manual actions that had been previously approved by the NRC in Fire Protection Safety Evaluation reports that were not originally part of the exemption request process. This process is addressed in RIS 2006-10.
(13) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated March 30, 2011. This exemption approved post fire operator manual actions that were not previously addressed in NRC approved Fire Protection Safety Evaluation Reports. The need to request this exemption is addressed in RIS 2006-10.
5.3.3 Fire Area 4: Unit 2 - Stairwell No. 24 (Elev. 91'-6" to 135'-0"); Recirculation Pump M-G Set Room (Elev. 135'-0")
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete (part 2-hr adjacent to fire area 2)
N - Reinforced concrete (part 3-hr elev. 135'-0")
E - Reinforced concrete (part 2-hr adjacent to fire area 2)
E - Reinforced concrete (part 3-hr adjacent to fire area 57 elev. 135'-0")
S - Reinforced concrete 3-hr W - Reinforced concrete (part 2-hr adjacent to fire area 2)
W - Reinforced concrete (exterior wall none Floor: Reinforced concrete foundation mat none Reinforced concrete (elev. 135'-0") 3-hr Ceiling: Reinforced concrete 3-hr FPP 5.3-14 REV. 21, APRIL 2017
PBAPS FPP Access: Door connecting to stairwell no. 24 Doors connecting M-G set room to fire area 2 (b) Major Components in Fire Area 20CO4BX HPCI Alternative Control Station 20C873 HPCI Aux Relay Control Panel 20D41 HPCI Gland Seal CDSR Vacuum Pump Starter 20D42 HPCI Gland Seal CDSR Cond Pump Starter 20D43 HPCI Aux Lube Oil Pump Starter 20S676 HPCI Governor Control Box (c) Postulated Fire in Area (1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is of the self-extinguishing type).
(2) Deleted.
(3) Since no combustible material is located in stairwell no.
24, the origin of a postulated fire in the stairwell is indeterminate.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation in the main control room. A signal from any smoke detector in the area will open a deluge valve, thus supplying water under pressure to closed sprinkler heads. A fire under the sprinkler system will melt the fusible link on the directional spray nozzles and pendent sprinkler heads at a predetermined temperature, causing the heads to open and extinguish the fire.
The system can be manually actuated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown Fire Area 4 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown method C for Unit 2 and shutdown methods A, B, and C for Unit 3 are either encapsulated by a qualified fire barrier, related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any FPP 5.3-15 REV. 21, APRIL 2017
PBAPS FPP functions that could be lost. Equipment located in this fire area that is associated with shutdown method C for Unit 2 and shutdown methods A, B, and C for Unit 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 emergency auxiliary bus may be affected by a fire in this area. Offsite power to the 4kV switchgear via the 00A020 emergency auxiliary bus is not affected by a fire in this area.
Therefore, for a fire in Fire Area 4, shutdown method C will be available to safely shut down Unit 2 and shutdown methods A, B, and C will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations (1) An exemption from Appendix R, section III.G.2 was granted by the NRC in the SER dated December 31, 1986, for protecting structural steel forming a part of or supporting fire barriers to provide fire resistance equivalent to that required of the barrier. The existing sprinkler system in the M-G set room provides floor area coverage for an oil fire and is sufficient to protect against fire from other combustibles located in the room. A fire from combustibles other than oil which could adversely the structural steel is not considered credible.
(2) An exemption from Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see references 10 and 20 in Appendix C and section 5.3.46) for a fire barrier between area 4 and area 57. A smoke tight porcelain through bushing is provided in a 14-gauge steel bus duct between fire area 4 and fire area
- 57. The bushing has not been tested to demonstrate its ability to withstand a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> fire. The automatic sprinkler system provides full room coverage in the M-G set room which contains the greatest fire hazard. The combination of the steel bus duct, porcelain bushing, and the sprinkler system will provide adequate resistance for preventing the spread of fire.
(3) In a letter from the licensee to the NRC dated September 16, 1983 (see reference 25 in Appendix C) the licensee FPP 5.3-16 REV. 21, APRIL 2017
PBAPS FPP identified that detection would not be installed in stairwell 24 (fire area-zone 4-6) in accordance with Appendix R, section III.F. In lieu of detection, a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rated barrier was installed to protect the safety related raceway in the area.
(4) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated January 30, 2009. This exemption approved post fire operator manual actions that had been previously approved by the NRC in Fire Protection Safety Evaluation reports that were not originally part of the exemption request process. This process is addressed in RIS 2006-10.
5.3.4 Fire Area 5: Unit 2 - A, B, and C Core Spray Pump Rooms (Elev. 91'-6"), Stairwell No. 18 (Elev. 91'-6" to 116'-0"); Torus Area (Elev. 91'-6"); North and South Vacuum Breaker Areas (Elev. 116'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete (parts 3-hr adjacent to fire areas 4 and 2)
N - Reinforced concrete (part 2-hr adjacent to fire area 9)
E - Reinforced concrete (part 3-hr adjacent to fire area 50)
E - Reinforced concrete (part 2-hr adjacent to fire area 9)
S - Reinforced concrete (exterior wall) none SW - Reinforced concrete 3-hr W - Reinforced concrete (exterior wall) none NW - Reinforced concrete 3-hr Floor: Reinforced concrete foundation mat none Ceiling: Reinforced concrete, exterior boundary none Reinforced concrete (contains two open 3-hr gratings adjacent to fire area 6S, 40 sq ft and 87 sq ft respectively, and a 50 sq ft open grating adjacent to the combustible free zone (CFZ) between fire areas 6N and 6S in the west corridor, unrated)
FPP 5.3-17 REV. 21, APRIL 2017
PBAPS FPP One structural steel member in fire zone 5-5G and two in 5-5F will be coated with structural steel fire proofing.)
Access: Door connecting to fire area 9 Doors connecting to fire area 1 Two doors connecting to fire area 2 Two doors connecting to fire area 50 (b) Major Components in Fire Area MO-4244 Vacuum Breaker Valves MO-4244A Vacuum Breaker Valves MO2-10-034A RHR Supply To Torus MO2-10-034B RHR Supply To Torus MO2-10-039A RHR Supply To Torus MO2-10-039B RHR Supply To Torus MO2-10-154 RHR Recirc Loop A Return Valve MO2-10-154B RHR Recirc Loop B Return Valve MO2-13-030 RCIC Test Bypass to CST MO2-14-026A Core Spray Test Bypass Valve MO2-14-026B Core Spray Test Bypass Valve MO2-23-021 HPCI Test Bypass to CST MO2-23-024 HPCI Redundant Test Bypass to CST MO2-23-031 HPCI Flush Line Shutoff To Torus TE-2-2-71A1 Torus Temperature Element TE-2-2-71A2 Torus Temperature Element TE-2-2-71B1 Torus Temperature Element TE-2-2-71B2 Torus Temperature Element TE-2-2-71C1 Torus Temperature Element TE-2-2-71C2 Torus Temperature Element TE-2-2-71D1 Torus Temperature Element TE-2-2-71D2 Torus Temperature Element TE-2-2-71E1 Torus Temperature Element TE-2-2-71E2 Torus Temperature Element TE-2-2-71F1 Torus Temperature Element TE-2-2-71F2 Torus Temperature Element TE-2-2-71G1 Torus Temperature Element TE-2-2-71G2 Torus Temperature Element TE-2-2-71H1 Torus Temperature Element TE-2-2-71H2 Torus Temperature Element TE-2-2-71J1 Torus Temperature Element TE-2-2-71J2 Torus Temperature Element TE-2-2-71K1 Torus Temperature Element TE-2-2-71K2 Torus Temperature Element TE-2-2-71L1 Torus Temperature Element TE-2-2-71L2 Torus Temperature Element FPP 5.3-18 REV. 21, APRIL 2017
PBAPS FPP TE-2-2-71M1 Torus Temperature Element TE-2-2-71M2 Torus Temperature Element TE-2-2-71N1 Torus Temperature Element TE-2-2-71N2 Torus Temperature Element TE-2442A Torus Temperature Element TE-2442B Torus Temperature Element 2DE133 Core Spray Pump Motor Oil Cooler HX 2DP37 Core Spray Pump 2GE57 Core Spray Pump Room Cooler HX 2GV24 Core Spray Pump Room Cooling Fan 2HE57 Core Spray Pump Room Cooler HX 2HV24 Core Spray Pump Room Cooling Fan AO-2336G Core Spray Pump Room Cooler HX Valve AO-2336H Core Spray Pump Room Cooler HX Valve MO2-14-05D Core Spray Minimum Bypass Valve MO2-14-07D Core Spray Pump Suction Valve FT2-14-40B Core Spray Flow Transmitter FT2-14-40A Core Spray Flow Transmitter 2CE133 Core Spray Pump Motor Oil Cooler HX 2CE57 Core Spray Pump Room Cooler HX 2CP37 Core Spray Pump 2CV24 Core Spray Pump Room Cooling Fan 2DE57 Core Spray Pump Room Cooler HX 2DV24 Core Spray Pump Room Cooling Fan AO-2336C Core Spray Pump Room Cooler HX Valve AO-2336D Core Spray Pump Room Cooler HX Valve MO2-14-05C Core Spray Minimum Bypass Valve MO2-14-07C Core Spray Pump Suction Valve 2AE133 Core Spray Pump Motor Oil Cooler HX 2AE57 Core Spray Pump Room Cooler HX 2AP37 Core Spray Pump 2AV24 Core Spray Pump Room Cooling Fan 2BE57 Core Spray Pump Room Cooler HX 2BV24 Core Spray Pump Room Cooling Fan AO-2336A Core Spray Pump Room Cooler HX Valve AO-2336B Core Spray Pump Room Cooler HX Valve MO2-14-05A Core Spray Minimum Bypass Valve MO2-14-07A Core Spray Pump Suction Valve 2BE133 Core Spray Pump Motor Oil Cooler HX 2BP37 Core Spray Pump 2EE57 Core Spray Pump Room Cooler HX 2EV24 Core Spray Pump Room Cooling Fan 2FE57 Core Spray Pump Room Cooler HX 2FV24 Core Spray Pump Room Cooling Fan AO-2336E Core Spray Pump Room Cooler HX Valve AO-2336F Core Spray Pump Room Cooler HX Valve LT-8027A Torus Water Level Transmitter FPP 5.3-19 REV. 21, APRIL 2017
PBAPS FPP LT-8027B Torus Water Level Transmitter LT-8123A Torus Water Level Transmitter MO2-14-05B Core Spray Minimum Bypass Valve MO2-14-07B Core Spray Pump Suction Valve AO-2511 Cont Atmos Control AO-2512 Cont Atmos Control AO-2513 Torus Exhaust Bypass AO-2514 Torus Exhaust Bypass SV2-20-82 Radwaste Cont Sump Drain SV2-20-83 Radwaste Cont Sump Drain SV2-20-94 Radwaste Cont Sump Drain SV2-20-95 Radwaste Cont Sump Drain SV-4950A CAD Supply SV-4950B CAD Supply SV-4951A CAD Supply SV-4951B CAD Supply SV-2980 Drywell Sample Return Isolation TE-4937A RCIC - Steam Leak Detection TE-4937B RCIC - Steam Leak Detection TE-4937C RCIC - Steam Leak Detection TE-4937D RCIC - Steam Leak Detection TE-4938A RCIC - Steam Leak Detection TE-4938B RCIC - Steam Leak Detection TE-4938C RCIC - Steam Leak Detection TE-4938D RCIC - Steam Leak Detection TE-4939A RCIC - Steam Leak Detection TE-4939C RCIC - Steam Leak Detection TE-4939D RCIC - Steam Leak Detection TE-4942A HPCI - Steam Leak Detection TE-4942B HPCI - Steam Leak Detection TE-4942C HPCI - Steam Leak Detection TE-4942D HPCI - Steam Leak Detection TE-4943A HPCI - Steam Leak Detection TE-4943B HPCI - Steam Leak Detection TE-4943C HPCI - Steam Leak Detection TE-4943D HPCI - Steam Leak Detection DPIS2-14-810 Core Spray Min Flow AO-2502A Torus Vacuum Relief AO-2968 CAC Inst N2 DPIS-2503A Cont Atmos Control DPT2-02-116A Steam Line Flow DPT2-02-116B Steam Line Flow DPT2-02-116C Steam Line Flow DPT2-02-116D Steam Line Flow DPT2-02-117A Steam Line Flow DPT2-02-117B Steam Line Flow DPT2-02-117C Steam Line Flow FPP 5.3-20 REV. 21, APRIL 2017
PBAPS FPP DPT2-02-117D Steam Line Flow DPT2-02-118A Steam Line Flow DPT2-02-118B Steam Line Flow DPT2-02-118C Steam Line Flow DPT2-02-118D Steam Line Flow DPT2-02-119A Steam Line Flow DPT2-02-119B Steam Line Flow DPT2-02-119C Steam Line Flow DPT2-02-119D Steam Line Flow PS2-14-044B Core Spray Auto Blowdown Interlock PS2-14-044D Core Spray Auto Blowdown Interlock PS2-14-044A Core Spray Auto Blowdown Interlock PS2-14-044C Core Spray Auto Blowdown Interlock AO-2502B Cont Atmos Control DPIS2-12-124A RWCU Break Isolation DPIS2-12-124B RWCU Break Isolation DPIS-2503B Cont Atoms Control H2E-4965C CAD Analysis H2E-4965D CAD Analysis O2E-4963C CAD Analysis O2E-4963D CAD Analysis SV-4960C CAD Analysis SV-4960D CAD Analysis SV-4961C CAD Analysis SV-4961D CAD Analysis DPIS2-14-81C Core Spray Min Flow DPIS2-14-81A Core Spray Min Flow DPIS2-14-81B Core Spray Min Flow LS2-23-91A HPCI Suppression Pool Level LS2-23-91B HPCI Suppression Pool Level (c) Postulated Fire in Area (1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is of the self-extinguishing type).
(2) Lube oil from the core spray pumps either leaking onto the floor with subsequent ignition of the oil or an overheating of the pumps causing ignition of the oil.
(3) Hydrogen and oxygen caused by leaks from cylinders in the vacuum breaker room with subsequent ignition of the gases.
(4) Since no combustible material is located in stairwell no.
18, the origin of a postulated fire in the area is indeterminate.
FPP 5.3-21 REV. 21, APRIL 2017
PBAPS FPP (5) Ignition of fire retardant impregnated wood scaffolding material located in the torus room storage container. (An unlikely occurrence because of the inherent fire protection properties associated with fire retardant material.)
(d) Consequence of Fire with Active Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 5 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown method A for Unit 2 and shutdown methods A, B, and C for Unit 3 are either related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown method A for Unit 2 and shutdown methods A, B, and C for Unit 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost. Suppression pool indication is considered available via physical separation between redundant components and cables located in this fire area.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 5, shutdown method A will be available to safely shut down Unit 2 and shutdown methods A, B, and C will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations (1) An exemption from Section III.G.2 of Appendix R was granted by the NRC in the SER dated December 31, 1986, for standby gas treatment system ductwork through 3-hour fire barriers without fire dampers. Inadvertent closure of dampers in two ducts through the north wall of the Unit 2, FPP 5.3-22 REV. 21, APRIL 2017
PBAPS FPP B core spray pump room, (fire zone 5-5D) could jeopardize secondary containment capability in the event of a reactor building isolation. Combustible loading is low, and chance of transmission of smoke through the ducts is low.
(2) An exemption from the requirements of Appendix R section III.G.2 was granted in an SER from the NRC dated March 13, 1985 (see reference 19 in Appendix C) for lack of suppression in the U2 torus area (room 1) elevation 91'-
6" (fire area 5-5c). The basis for the exemption was physical separation between redundant components and low combustible loading.
(3) An exemption from the requirements of Appendix R section III.G.2 was granted in an SER from the NRC dated March 13, 1985 (see reference 19 in Appendix C and sections 5.3.5.(f)(3) and 5.3.6.(f)(3)) for three gratings located in the floor of the U2 reactor building on elevation 135'-0" which is adjacent to fire area 5.
These gratings are located in fire area-zones 6S, 6S-20 (the neutron monitoring room) and in the CFZ in the west corridor between fire areas 6N and 6S. The basis for the exemption was low combustible loading and the fire protection features present.
(4) In a letter from the licensee to the NRC dated September 16, 1983 (see reference 25 in Appendix C) the licensee identified that detection would not be installed in stairwell 18 (fire area 5-7) in accordance with Appendix R, section III.F. In lieu of detection, a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rated barrier was installed to protect the safety related raceway in the area.
(5) An engineering evaluation has been performed to replace a 2 foot thick concrete hatch plug in the 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rated floor slab between fire area-zone 5-5C and 6N-5H with hatch plug fabricated from structural steel and lightweight concrete.
This evaluation is documented in Minor Physical Change (MPC) Engineering Change Request (ECR) PB 98-00382.
(6) An exemption from the requirements of Appendix R Section III.G.2 was granted in an SER from the NRC dated March 13, 1985 for post fire manual operation of valves for a fire in this area.
FPP 5.3-23 REV. 21, APRIL 2017
PBAPS FPP 5.3.5 Fire Area 6N: Unit 2 - North CRD Equipment Area, North Isolation Valve Compartment, Drywell Access, Corridors (Elev.
135'-0")
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete (part 3-hr adjacent to fire area 4)
N - Reinforced concrete (part 2-hr adjacent to fire area 9)
E - Reinforced concrete (part 3-hr adjacent to fire area 50)
E - Reinforced concrete (part 2-hr adjacent to fire area 9)
S - Reinforced concrete (part 3-hr adjacent to fire area 17)
(contains an 84 sq ft steel blowout panel, unrated)
S - Reinforced concrete (part none adjacent to fire area 18)
W - Reinforced concrete (part 3-hr adjacent to fire area 17)
W - Reinforced concrete (exterior wall) none Floor: Reinforced concrete(contains one 50 3-hr sq ft open grating in the CFZ between fire areas 6N and 6S in the west corridor which is adjacent to fire area 5, unrated)
(One structural steel member adjacent to fire area 5 will be coated with structural steel fire proofing.)
Ceiling: Reinforced concrete 3-hr (Nine structural steel members will be coated with structural steel fire proofing.)
Access: Door connecting to fire area 9 Two doors connecting to fire area 17 Corridors connecting to fire area 6S (b) Major Components in Fire Area AO-4807 HPCI Steam Isolation Bypass FPP 5.3-24 REV. 21, APRIL 2017
PBAPS FPP MO2-10-017 RHR Shutdown Cooling Suction Valve MO2-10-025B RHR Recirc Loop B Return Valve MO2-10-026B RHR Drywell Spray Isolation Valve MO2-10-031B RHR Drywell Spray Isolation Valve MO2-14-011B Outboard Core Spray Discharge Valve MO2-14-012B Inboard Core Spray Discharge Valve MO2-23-016 Inboard HPCI Steam Supply Isolation Valve 2OD11 HPCI Motor Control Center 2OY32 Lighting Panel MCC20B37 2B Motor Control Center SV-8130A Backup N2 Supply MO-2373 Recirc Pumps Cooling Water Isolation MO-2374 Recirc Pumps Cooling Water Isolation SV-4948B CAD Supply TE-4944A HPCI Steam Leak Det TE-4944B HPCI Steam Leak Det TE-4944C HPCI Steam Leak Det TE-4944D HPCI Steam Leak Det AO-2521A CAD Purge AO-2521B CAD Purge FT-8130A Instrument Nitrogen FT-8130B Instrument Nitrogen MO-2200A Drywell Clr Inlet Isol MO-2200B Drywell Clr Inlet Isol PT-8142A Instrument Nitrogen SV2-03-32B Scram Disch Vol Vent Isol SV2-03-35B Scram Disch Vol Vent Isol SV-4966A CAD Analysis SV-4966B CAD Analysis SV-4966C CAD Analysis SV-4966D CAD Analysis SV-8101 CAD Analysis (c) Postulated Fire in Area (1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is of the self-extinguishing type).
(2) Since there are no combustible materials located in the north isolation valve room and the drywell areas, the origin of a postulated fire is indeterminate.
(3) Wood with subsequent ignition from an external source (an unlikely occurrence because of the fire protection properties associated with fire retardant material).
FPP 5.3-25 REV. 21, APRIL 2017
PBAPS FPP (d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire annunciator in the main control room. Heat from a fire in the west corridor will cause heat detectors to activate which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room. When both heat detectors in the west corridor are activated, a deluge valve will open supplying water to the water curtain system's open sprinkler heads to extinguish the fire. Fire will be prevented from passing through the corridor and affecting fire area 6S.
(e) Effect of Fire on Safe Shutdown Fire Area 6N contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown method C for Unit 2 and shutdown methods A, B, and C for Unit 3 are either encapsulated by a qualified fire barrier, related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown method C for Unit 2 and shutdown methods A, B, and C for Unit 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 emergency auxiliary bus may be affected by a fire in this area. Offsite power to the 4kV switchgear via the 00A020 emergency auxiliary bus is not affected by a fire in this area.
Therefore, for a fire in Fire Area 6N, shutdown method C will be available to safely shut down Unit 2 and shutdown methods A, B, and C will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations (1) An exemption from Section III.G.2 of Appendix R was granted by the NRC in the SER dated December 31, 1986, for standby gas treatment system ductwork through 3-hour fire barriers without fire dampers. Inadvertent closure FPP 5.3-26 REV. 21, APRIL 2017
PBAPS FPP of dampers in two ducts through the floor of the elevation 135 feet CRD area could jeopardize secondary containment capability in the event of a reactor building isolation. Combustible loading is low, and chance of transmission of smoke through the ducts is low.
(2) An exemption from Section III.G.2 of Appendix R was granted by the NRC in the SER dated December 31, 1986, for a heating and ventilating duct through a 3-hour fire barrier without a fire damper. The duct is through the floor of the elevation 135 feet CRD area and is a carbon steel pipe. Transmission of smoke through the hard-piped duct into the torus would be inconsequential.
(3) An exemption from the requirements of Appendix R section III.G.2 was granted in an SER from the NRC dated March 13, 1985 (see reference 19 in Appendix C and section 5.3.4.(f)(3)) for a grating located in the floor of the U2 reactor building on elevation 135'-0". This grating is located in the CFZ between fire areas 6N and 6S in the west corridor which is adjacent to fire area 5. The basis for the exemption was low combustible loading and the fire protection features present.
(4) An exemption from the requirements of Appendix R section III.G.2 was granted in an SER from the NRC dated March 13, 1985 (see reference 19 in Appendix C and section 5.3.6.(f)(4)) for the lack of automatic suppression throughout the area. The basis for the exemption is that Area 6N is separated from 6S by a CFZ on one side and an automatically actuated deluge water curtain and a CFZ on the other. Components and cables associated with redundant methods are separated from each other via the CFZ. Automatic detection is provided. An engineering analysis evaluates the CFZ with respect to the equipment credited for safe shutdown in Fire Areas 6S and 6N, demonstrating that the separation provided is equivalent to III.G.2 of 10CFR 50 Appendix R.
(5) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated December 31, 1986 (see reference 18 in Appendix C and section 5.3.13.(f)(3)) for separation of cables and equipment and non-safety circuits of redundant trains by a fire barrier having a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rating. A steel blowout panel and labyrinth are provided for steam venting in FPP 5.3-27 REV. 21, APRIL 2017
PBAPS FPP the event of a high energy line break between fire areas 6N and 17 and between fire areas 17 and 50. There are no fixed combustibles in fire area 17. Operation of affected equipment in the MSIV room occurs early in the safe shutdown scenario, and no spurious actuation in the room can affect valve positioning.
(6) An engineering evaluation has been performed to replace a 2 foot thick concrete hatch plug in the 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rated floor slab between fire area-zone 5-5C and 6N-5H with hatch plug fabricated from structural steel and lightweight concrete.
This evaluation is documented in Minor Physical Change (MPC) Engineering Change Request (ECR) PB 98-00382.
(7) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated March 30, 2011. This exemption approved post fire operator manual actions that were not previously addressed in NRC approved Fire Protection Safety Evaluation Reports. The need to request this exemption is addressed in RIS 2006-10.
5.3.6 Fire Area 6S: Unit 2 - South CRD Equipment Area, Neutron Monitoring Room, South Isolation Valve Compartment CRD Equipment Room (Elev. 135'-0"); Cleanup Recirculation Pump Rooms, Regen Heat Exchanger Room, Non-Regen Heat Exchanger Room, Transfer Pump Room, Backwash Receiving Tank Room, Operating Area, Isolation Valve Compartment (Elev. 165'-0"); Stairwell No.
30 (Elev. 165'-0" to 180'-0"); Valve Compartments (Elev. 180'-0"); Reactor Building Ventilating Equipment Area, Prefilter and HEPA Filter Compartments, Laydown Area, Filter-Demineralizer Compartments, Holding Pump Compartments, Source Storage and Calibration (Elev.
195'-0"); Steam Separator and Steam Dryer Storage Pit (Elev. 209'-0"); Reactor Building Fan Room (Elev. 214'-0"); New Fuel Storage (Elev. 217'-0")" Washdown Area, laydown areas (Elev. 234'-0").
(a) Structural and Architectural Design Features of Fire Area FPP 5.3-28 REV. 21, APRIL 2017
PBAPS FPP Construction Rating Walls: N - Reinforced concrete (parts adjacent 3-hr to fire areas 17, 25, and 27)
N - Reinforced concrete (part 2-hr adjacent to fire area 9)
N - Reinforced concrete (part adjacent 3-hr to fire area 18 and exterior wall E - Reinforced concrete (part 3-hr adjacent to fire area 50)
E - Reinforced concrete (part 2-hr adjacent to fire area 9)
E - Reinforced concrete (part adjacent 3-hr to fire area 50, elev. 195'-0", see 5.3.6(f)(2) for discussion about evaluation of the barrier)
E - Reinforced concrete (exterior wall, none elev. 234'-0")
S - Reinforced concrete (part adjacent none to boilerhouse; only fire area 6S is adjacent to the boilerhouse)
S - Reinforced concrete (part adjacent 3-hr to liquid nitrogen storage building)
S - Reinforced concrete (part 3-hr adjacent to fire area 1)
S - Reinforced concrete (exterior wall) none W - Reinforced concrete (exterior wall) none W - Reinforced concrete (part 3-hr adjacent to fire area 1)
Floor: Reinforced concrete (contains two open 3-hr gratings adjacent to fire area 5, 40 sq ft and 87 sq ft respectively, and a 50 sq ft open grating also adjacent to fire area 5 that is located in the CFZ between fire areas 6N and 6S in the west corridor, unrated)
(Two structural steel members adjacent to fire area 5-5F will be coated with structural steel fire proofing. Nine structural steel members adjacent to fire area 6N will be coated with fire proofing.)
Reinforced concrete (area north of column 3-hr line 12, elev. 165'-0")
Ceiling: Metal deck, nonreinforced concrete and none FPP 5.3-29 REV. 21, APRIL 2017
PBAPS FPP built-up roofing Access: Doors connecting to fire areas 1 and 9 Corridors connecting to fire area 6N Door connecting to fire area 18 Equipment access lock Door connecting to fire area 50 (b) Major Components in Fire Area MO2-10-025A RHR Recirc Loop A Return Valve MO2-10-026A RHR Drywell Spray Isolation Valve MO2-14-011A Outboard Core Spray Discharge Valve MO2-14-012A Inboard Core Spray Discharge Valve SV-8130B Backup N2 Supply Valve 2OY35 Distribution Panel LT2-2-3-70 Reactor Water Level Transmitter MCC20B38 2C Motor Control Center MO2-12-018 RWCU Containment Isolation Valve 2OB10 2A Emergency Load Center 20B11 2B Emergency Load Center 2OV12 2C Emergency Load Center 2OB13 2D Emergency Load Center LT2-2-3-110A Reactor Water Level Transmitter LT2-2-3-110B Reactor Water Level Transmitter LT2-2-3-61 Reactor Water Level Transmitter LT2-2-3-72A Reactor Water Level Transmitter LT2-2-3-72B Reactor Water Level Transmitter LT2-2-3-72C Reactor Water Level Transmitter LT2-2-3-72D Reactor Water Level Transmitter MCC20B36 2A Motor Control Center MO2-10-031A RHR Drywell Spray Isolation Valve MO2-12-056 RWCU To Condenser Hot Well MO2-12-057 RWCU To Condenser Hot Well PR-8102A Drywell Pressure Transmitter PT-8102B Drywell Pressure Transmitter PT-8102C Drywell Pressure Transmitter PT-8102D Drywell Pressure Transmitter PT2-2-3-404A Reactor Pressure Transmitter PT2-2-3-404B Reactor Pressure Transmitter PT2-6-105 Reactor Pressure Transmitter PT2-6-53A Reactor Pressure Transmitter PT2-6-53B Reactor Pressure Transmitter CV2-12-55 RWCU Pump Suction Flow Control Valve MO2-12-053 RWCU To Condenser Hot Well PT-2508A Drywell Pressure Transmitter PT-2508B Drywell Pressure Transmitter FPP 5.3-30 REV. 21, APRIL 2017
PBAPS FPP AO-2505 Drywell Vent Isolation Valve AO-2520 Containment Atmos Control SV-4948A CAD Supply AO-2519 Cont N2 Purge AO-2523 Containment Atmos Control AO-2969A Inst N2 Isolation PT-2-02-3-52D Core Spray/RHR Pressure Permissive N210025A Motor Control Center DPIS-2-02-116A Steam Line Flow DPIS-2-02-116B Steam Line Flow DPIS-2-02-116C Steam Line Flow DPIS-2-02-116D Steam Line Flow DPIS-2-02-117A Steam Line Flow DPIS-2-02-117B Steam Line Flow DPIS-2-02-117C Steam Line Flow DPIS-2-02-117D Steam Line Flow DPIS-2-02-118A Steam Line Flow DPIS-2-02-118B Steam Line Flow DPIS-2-02-118C Steam Line Flow DPIS-2-02-118D Steam Line Flow DPIS-2-02-119A Steam Line Flow DPIS-2-02-119B Steam Line Flow DPIS-2-02-119C Steam Line Flow DPIS-2-02-119D Steam Line Flow LT2-02-3-083A Reactor Water Level Transmitter LT2-02-3-083B Reactor Water Level Transmitter LT2-02-3-099A Reactor Water Level Transmitter LT2-02-3-099B Reactor Water Level Transmitter LT2-02-3-099C Reactor Water Level Transmitter LT2-02-3-099D Reactor Water Level Transmitter LT2-02-3-101A Reactor Water Level Transmitter LT2-02-3-101B Reactor Water Level Transmitter LT2-02-3-101C Reactor Water Level Transmitter LT2-02-3-101D Reactor Water Level Transmitter LT2-02-3-111A Reactor Shroud Level Transmitter LT2-02-3-111B Reactor Shroud Level Transmitter PT-2-02-3-404A Reactor Pressure PT-2-02-3-404B Reactor Pressure PT2-02-3-55A Reactor Prot System PT2-02-3-55B Reactor Prot System PT2-02-3-55C Reactor Prot System PT2-02-3-55D Reactor Prot System PT2-05-12A Drywell Pressure Transmitter PT2-05-12B Drywell Pressure Transmitter PT2-05-12C Drywell Pressure Transmitter PT2-05-12D Drywell Pressure Transmitter PT2-10-100A Drywell Pressure Transmitter FPP 5.3-31 REV. 21, APRIL 2017
PBAPS FPP PT2-10-100B Drywell Pressure Transmitter PT2-10-100C Drywell Pressure Transmitter PT2-10-100D Drywell Pressure Transmitter SV-20465 SGTS Containment Isolation SV-4949A Cont Atmos Control AO-2506 Cont Atmos Control AO-2507 Cont Atmos Control AO-2509 Cont Atmos Control AO-2510 Cont Atmos Control AO-4235 Inst N2 Isol Valve E/P-4957 CAD Purge and Vent FIT-4957 CAD Purge and Vent H2E-4965B CAD Analysis O2E-4965B CAD Analysis RE2-17-432A Reactor Building Vent Rad Monitor RE2-17-432B Reactor Building Vent Rad Monitor RE2-17-432C Reactor Building Vent Rad Monitor RE2-17-432D Reactor Building Vent Rad Monitor SV-4960B CAD Isol Valve SV-4961B CAD Isol Valve SV-8100 CAD Analysis (c) Postulated Fire in Area (1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is of the self-extinguishing type).
(2) A boronated shield door in front of the access opening to the drywell with subsequent ignition from an outside source.
(3) Ignition of combustibles in the South Isolation Valve Room.
FPP 5.3-32 REV. 21, APRIL 2017
PBAPS FPP (4) Since there are no combustible materials located in the drywell areas, the origin of a postulated fire is indeterminate.
(5) Since the combustible materials located in the neutron monitoring room result in only few seconds of fire severity change the origin of a postulated fire is indeterminate.
(6) Since there are no combustibles in the heat exchanger rooms, pump rooms, and valve compartments, the origin of a postulated fire is indeterminate.
(7) Wood and paper with subsequent ignition from external sources.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire annunciator in the main control room. Heat from a fire in the west corridor will cause heat detectors to activate which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room. Upon receipt of the alarm in the control room, the plant fire brigade will be dispatched to extinguish the fire. When both heat detectors in the west corridor are activated, a deluge valve will open supplying water to the water curtain system's open sprinkler heads to extinguish the fire. Fire will be prevented from passing through the corridor and affecting fire area 6N.
(e) Effect of Fire on Safe Shutdown Fire Area 6S contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown method B for Unit 2 and shutdown methods A, B, and C for Unit 3 are either related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown method B for Unit 2 and shutdown methods A, B, and C for Unit 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
FPP 5.3-33 REV. 21, APRIL 2017
PBAPS FPP The availability of offsite power to the 4kV switchgear via the 00A019 emergency auxiliary bus may be affected by a fire in this area. Offsite power to the 4kV switchgear via the 00A020 emergency auxiliary bus is not affected by a fire in this area.
Therefore, for a fire in Fire Area 6S, shutdown method B will be available to safely shut down Unit 2 and shutdown methods A, B, and C will be available to safely shut down Unit 3.
A postulated fire in the vicinity of the reactor vessel instrumentation reference leg backfill system could adversely affect reactor vessel water level indication due to reference leg density changes caused by an increase in water temperature.
Since there are no fire initiators in close proximity to the backfill system tubing, administratively controlled transient combustible free zones throughout the locations of the backfill system on elevations 135 feet and 165 feet in the reactor building will preclude any adverse effect on level indication, due to fire, prior to annunciation in the main control room.
Following annunciation in the main control room the backfill system will be administratively isolated from the reference legs.
(f) Exemption Requests and Evaluations (1) An exemption from Section III.G.2 of Appendix R was granted by the NRC in the SER dated December 31, 1986, for standby gas treatment system ductwork through 3-hour fire barriers without fire dampers. Inadvertent closure of dampers in two ducts through the floor of elevation 165 feet operating area could jeopardize secondary containment capability in the event of a reactor building isolation.
Combustible loading is low, and chance of transmission of smoke through the ducts is low.
(2) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated December 31, 1986 (see reference 18 in Appendix C and section 5.3.40 (f)(3)), to provide fixed suppression.
The exemption credits the substantial barrier provided by the wall and the distance between credited components on either side. Subsequently, the barrier was evaluated and determined to be adequate for the fire hazard.
FPP 5.3-34 REV. 21, APRIL 2017
PBAPS FPP (3) An exemption from the requirements of Appendix R section III.G.2 was granted in an SER from the NRC dated March 13, 1985 (see reference 19 in Appendix C and section 5.3.4.(f)(3)) for three gratings located in the floor of the U2 reactor building on elevation 135'-0" which is adjacent to fire area 5. These gratings are located in fire area-zones 6S, 6S-20 (the neutron monitoring room) and in the CFZ in the west corridor between fire areas 6N and 6S. The basis for the exemption was low combustible loading and the fire protection features present.
(4) An exemption from the requirements of Appendix R section III.G.2 was granted in an SER from the NRC dated March 13, 1985 (see reference 19 in Appendix C and section 5.3.5.(f)(4)) for the lack of automatic suppression throughout the area. The basis for the exemption is that Area 6N is separated from 6S by a CFZ on one side and an automatically actuated deluge water curtain and a CFZ on the other. Components and cables associated with redundant methods are separated from each other via the CFZ. Automatic detection is provided. An engineering analysis evaluates the CFZ with respect to the equipment credited for safe shutdown in Fire Areas 6S and 6N, demonstrating that the separation provided is equivalent to III.G.2 of 10CFR 50 Appendix R.
(5) An exemption from the requirements of Appendix R,Section III.F, was granted in an SER from the NRC dated August 18, 2000, for the lack of fire detection in fire zones 6S-5M and 6S-42. The bases for the approval of the exemption in these two zones is minimal access to the rooms (since they are locked high radiation areas),
low combustible loading, and the location of redundant shutdown features (to those located in these zones) outside the fire zone.
(6) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated January 30, 2009. This exemption approved post fire operator manual actions that had been previously approved by the NRC in Fire Protection Safety Evaluation reports that were not originally part of the exemption request process. This process is addressed in RIS 2006-10.
FPP 5.3-35 REV. 21, APRIL 2017
PBAPS FPP (7) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated March 30, 2011. This exemption approved post fire operator manual actions that were not previously addressed in NRC approved Fire Protection Safety Evaluation Reports. The need to request this exemption is addressed in RIS 2006-10.
5.3.7 Fire Area 9: Units 2 - Stairwell No. 19, Elevator Shaft (Elev. 91'-0" to 251'-8"); Elevator Machine Room (Elev. 251'-8")
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete (parts adjacent 3-hr to fire areas 2, 4, and 25; exterior wall, elev. 195'-0")
N - Reinforced concrete (exterior wall 2-hr E - Reinforced concrete (part 3-hr adjacent to fire area 50)
E - Reinforced concrete (exterior wall, 2-hr elev. 234'-0")
S - Reinforced concrete 2-hr W - Reinforced concrete 2-hr Floor: Reinforced concrete foundation mat none Reinforced concrete (elevator machine 3-hr room)
Ceiling: Metal deck, nonreinforced concrete and 3-hr built-up roofing Access: Doors connecting to fire areas 5, 6N, 6S, and 25 (b) Major Components in Fire Area None.
(c) Postulated Fire in Area Since there are no combustibles present, the origin of a postulated fire is indeterminate.
(d) Consequence of Fire with Active Fire Suppression FPP 5.3-36 REV. 21, APRIL 2017
PBAPS FPP Upon notification of a fire, the plant fire brigade will be dispatched to extinguish the fire.
(e) Effect of Fire on Safe Shutdown Fire Area 9 does not contain safe shutdown cables or equipment.
Offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 9, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) An exemption from Section III.G.2 of Appendix R was granted by the NRC in the SER dated December 31, 1986, for standby gas treatment system ductwork through 3-hour fire barriers without fire dampers. Inadvertent closure of dampers in two ducts through the south wall elevation 91'-
6" could jeopardize secondary containment capability in the event of a reactor building isolation.
Combustible loading is low, and chance of transmission of smoke through the ducts is low.
5.3.8 Fire Area 10: Unit 3 - B and D RHR Heat Exchanger and Pump Rooms (Elev. 91'-6" and 116'-0"); Stairwell No. 27 (Elev.
135'-0" to 234'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete (exterior wall none to elev. 135'-0")
N - Reinforced concrete (exterior wall 2-hr elev. 135'-0" and above)
E - Reinforced concrete (part 3-hr adjacent to fire area 12)
E - Reinforced concrete (part 3-hr adjacent to fire area 13N)
SE - Reinforced concrete 3-hr S - Reinforced concrete 3-hr FPP 5.3-37 REV. 21, APRIL 2017
PBAPS FPP W - Reinforced concrete (exterior wall none to elev. 135'-0")
W - Reinforced concrete (exterior wall 2-hr elev. 135'-0" and above)
Floor: Reinforced concrete foundation mat none Ceiling: Reinforced concrete (RHR room B) 3-hr Reinforced concrete none Metal deck, nonreinforced concrete none and built-up roofing Access: Doors connecting to stairwell no. 27 Door connecting to fire area 12 (b) Major Components in Fire Area 3BE24 RHR Heat Exchanger 3EV25 RHR Pump Room Cooling Fan 3FV25 RHR Pump Room Cooling Fan MO3-10-015B RHR Shutdown Cooling Suction Valve MO3-10-89B RHR HX Discharge Valve 3DE24 RHR Heat Exchanger 3GE58 RHR Pump Room Cooler HX 3GV25 RHR Pump Room Cooling Fan 3HV25 RHR Pump Room Cooling Fan AO-3335G RHR Pump Room Cooler HX Valve DPT3-10-179 RHR/HPSW Differential Pressure Transmitter FT3-10-109B RHR Flow Transmitter FT3-10-178 RHR Loop B Flow Transmitter MO3-10-89D RHR HX Discharge Valve 3BE124 RHR Pump Seal Water Cooler HX 3BP35 RHR Pump B LT-9123B Torus Water Level Transmitter LT-9456 Suppression Pool Water Level Transmitter MO3-10-013B LPCI Suction Isolation Valve MO3-10-016B RHR Pump Discharge Bypass 3DE124 RHR Pump Seal Water Cooler HX 3DP35 RHR Pump D MO3-10-013D LPSI Suction Isolation Valve MO3-10-015D RHR Shutdown Cooling Suction Valve ML3-10-016D RHR Pump Discharge Bypass AO-9098B RHR Sample Line Isolation Valve AO-9099B RHR Sample Line Isolation Valve AO-9098D RHR Sample Line Isolation Valve AO-9099D RHR Sample Line Isolation Valve PS3-10-120B RHR Auto Blowdown Interlock FPP 5.3-38 REV. 21, APRIL 2017
PBAPS FPP PS3-10-120D RHR Auto Blowdown Interlock DPIS3-10-121D RHR Pump D Recirc Flow CV-3-10-3677B RHR B Flow Control Valve CV-3-10-3677D RHR D Flow Control Valve MO3-10-33452B RHR B/D Cross-Tie Isolation Valve (c) Postulated Fire in Area (1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is of the self-extinguishing type).
(2) Lube oil from the RHR pump either leaking onto the floor with subsequent ignition of the oil or an overheating of the pumps causing ignition of the oil.
(3) Since there are no combustible materials located in stairwell no. 27, the origin of a postulated fire is indeterminate.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 10 contains safe shutdown cables and equipment.
Cables located in this area that are associated with shutdown methods A, B, and C for Unit 2 and shutdown methods A and C for Unit 3 are associated with equipment that has redundant components not affected by a fire in this area. Equipment located in this area that is associated with shutdown methods A, B, and C for Unit 2 and shutdown methods A and C for Unit 3 has redundant components not affected by a fire in this area.
Offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 10, shutdown methods A, B, and C will be available to safely shut down Unit 2 and shutdown methods A and C will be available to safely shut down Unit 3.
FPP 5.3-39 REV. 21, APRIL 2017
PBAPS FPP 5.3.9 Fire Area 12: Unit 3 - A, B, and C Core Spray Pump Rooms (Elev. 91'-6"); Torus Area (Elev. 92'-6"); Stairwell No.
23 (Elev. 91'-6" to 116'-0")
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete (exterior wall) none E - Reinforced concrete (part adjacent 3-hr to fire area 50)
E - Reinforced concrete (part 2-hr adjacent to fire area 16)
S - Reinforced concrete (part 3-hr adjacent to fire area 2)
S - Reinforced concrete (part 2-hr adjacent to fire area 16)
SW - Reinforced concrete 3-hr W - Reinforced concrete (exterior wall none NW - Reinforced concrete 3-hr Floor: Reinforced concrete foundation mat none Ceiling: Reinforced concrete, exterior boundary none Reinforced concrete(contains two open 3-hr gratings adjacent to fire area 13S, 40 sq ft and 87 sq ft respectively, and a 50 sq ft open grating adjacent to the CFZ between fire areas 13N and 13S in the west corridor, unrated)
(One structural steel member in fire zone 12-13G adjacent to fire area 13S and two structural steel members in fire zone 12-13F adjacent to fire area 13N will be coated with structural steel fire proofing.)
Access: Door connecting to fire area 16 Door connecting to fire area 10 Two doors connecting to fire area 2 Two doors connecting to fire area 50 (b) Major Components in Fire Area FT3-14-40B Core Spray Flow Transmitter FPP 5.3-40 REV. 21, APRIL 2017
PBAPS FPP LT-9453 CST Level Transmitter FT3-14-40A Core Spray Flow Transmitter PT-7466 ESW Pressure Transmitter MO-5244 Vacuum Breaker Valves MO-5244A Vacuum Breaker Valves MO3-10-034A RHR Supply To Torus MO3-10-034B RHR Supply To Torus MO3-10-039A RHR Supply To Torus MO3-10-039B RHR Supply To Torus MO3-10-154A RHR Recirc Loop A Return Valve MO3-10-154B RHR Recirc Loop B Return Valve MO3-13-030 RCIC Test Bypass To CST MO3-14-026A Core Spray Test Bypass Valve MO3-14-026B Core Spray Test Bypass Valve MO3-23-021 HPCI Test Bypass To CST MO3-23-024 HPCI Redundant Test Bypass To CST MO3-23-031 HPCI Flush Line Shutoff To Torus TE-3-2-71A1 Torus Temperature Element TE-3-2-71A2 Torus Temperature Element TE-3-2-71B1 Torus Temperature Element TE-3-2-71B2 Torus Temperature Element TE-3-2-71C1 Torus Temperature Element TE-3-2-71C2 Torus Temperature Element FPP 5.3-41 REV. 21, APRIL 2017
PBAPS FPP TE-3-2-71D1 Torus Temperature Element TE-3-2-71D2 Torus Temperature Element TE-3-2-71E1 Torus Temperature Element TE-3-2-71E2 Torus Temperature Element TE-3-2-71F1 Torus Temperature Element TE-3-2-71F2 Torus Temperature Element TE-3-2-71G1 Torus Temperature Element TE-3-2-71G2 Torus Temperature Element TE-3-2-71H1 Torus Temperature Element TE-3-2-71H2 Torus Temperature Element TE-3-2-71J1 Torus Temperature Element TE-3-2-71J2 Torus Temperature Element TE-3-2-71K1 Torus Temperature Element TE-3-2-71K2 Torus Temperature Element TE-3-2-71L1 Torus Temperature Element TE-3-2-71L2 Torus Temperature Element TE-3-2-71M1 Torus Temperature Element TE-3-2-71M2 Torus Temperature Element TE-3-2-71N1 Torus Temperature Element TE-3-2-71N2 Torus Temperature Element TE-3442A Torus Temperature Element TE-3442B Torus Temperature Element TE-9457 Suppression Pool Temperature Element 3DE133 Core Spray Pump Motor Oil Cooler HX FPP 5.3-42 REV. 21, APRIL 2017
PBAPS FPP 3DP37 Core Spray Pump 3GE57 Core Spray Pump Room Cooler HX 3GV-24 Core Spray Pump Room Cooling Fan 3HE57 Core Spray Pump Room Cooler HX 3HV-24 Core Spray Pump Room Cooling Fan AO-3336G Core Spray Pump Room Cooler HX Valve AO-3336H Core Spray Pump Room Cooler HX Valve MO3-14-05D Minimum Bypass Valve MO3-14-07D Core Spray Pump Suction Valve 3BE133 Core Spray Pump Motor Oil Cooler HX 3BP37 Core Spray Pump 3EE57 Core Spray Pump Room Cooler HX 3EV-24 Core Spray Pump Room Cooling Fan 3FE57 Core Spray Pump Room Cooler HX 3FV-24 Core Spray Pump Room Cooling Fan AO-3336E Core Spray Pump Room Cooler HX Valve AO-3336F Core Spray Pump Room Cooler HX Valve MO3-14-05B Core Spray Minimum Bypass Valve MO3-14-07B Core Spray Pump Suction Valve 3CE133 Core Spray Pump Motor Oil Cooler HX 3CE57 Core Spray Pump Room Cooler HX 3CP37 Core Spray Pump 3CV-24 Core Spray Pump Room Cooling Fan FPP 5.3-43 REV. 21, APRIL 2017
PBAPS FPP 3DE57 Core Spray Pump Room Cooler HX 3DV-24 Core Spray Pump Room Cooling Fan AO-3336C Core Spray Pump Room Cooler HX Valve AO-3336D Core Spray Pump Room Cooler HX Valve LT-9027A Torus Water Level Transmitter LT-9027B Torus Water Level Transmitter LT-9123A Torus Water Level Transmitter MO3-14-05C Core Spray Minimum Bypass Valve MO3-14-07C Core Spray Pump Suction Valve MO-3200B Drywell Cooling 3AE133 Core Spray Pump Motor Oil Cooler HX 3AE57 Core Spray Pump Room Cooler HX 3AP37 Core Spray Pump 3AV24 Core Spray Pump Room Cooling Fan 3BE57 Core Spray Pump Room Cooler HX 3BV24 Core Spray Pump Room Cooling Fan AO-3336A Core Spray Pump Room Cooler HX Valve AO-3336B Core Spray Pump Room Cooler HX Valve MO3-14-05A Core Spray Minimum Bypass Valve MO3-14-07A Core Spray Pump Suction Valve AO-3502B Cont Atmos Control DPIS-3503B Cont Atmos Control DPT-3-02-116A Steam Line Flow DPT-3-02-116B Steam Line Flow FPP 5.3-44 REV. 21, APRIL 2017
PBAPS FPP DTP-3-02-116C Steam Line Flow DPT-3-02-116D Steam Line Flow DPT-3-02-117A Steam Line Flow DPT-3-02-117B Steam Line Flow DPT-3-02-117C Steam Line Flow DTP-3-02-117D Steam Line Flow DPT-3-02-118A Steam Line Flow DPT-3-02-118B Steam Line Flow DPT-3-02-118C Steam Line Flow DPT-3-02-118D Steam Line Flow DPT-3-02-119A Steam Line Flow DTP-3-02-119B Steam Line Flow DPT-3-02-119C Steam Line Flow DPT-3-02-119D Steam Line Flow H2E-5965C CAD Analysis H2E-5965D CAD Analysis O2E-5963C CAC Analysis O2E-5963D CAC Analysis PS3-14-044A Core Spray Auto Blowdown Interlock PS3-14-044C Core Spray Auto Blowdown Interlock PS3-14-044B Core Spray Auto Blowdown Interlock PS3-14-044D Core Spray Auto Blowdown Interlock SV-5960C CAD Analysis FPP 5.3-45 REV. 21, APRIL 2017
PBAPS FPP SV-5960D CAD Analysis SV-5961C CAD Analysis SV-5961D CAD Analysis DPIS3-12-124A RWCU Break Isolation DPIS3-12-124B RWCU Break Isolation DPIS-3503A Cont Atmos Control AO-3511 Cont Atmos Control AO-3512 Cont Atmos Control AO-3513 Cont Atmos Control AO-3514 Cont Atmos Control AO-3968 CAC Inst N2 MO3-10-038A RHR Torus Cooling MO3-10-038B RHR Torus Cooling SV3-20-82 Radwaste Cont Sump Drain SV3-20-83 Radwaste Cont Sump Drain SV3-20-94 Radwaste Cont Sump Drain SV3-20-95 Radwaste Cont Sump Drain SV-5950A CAD Analysis SV-5950B CAD Analysis SV-5951A CAD Analysis SV-5951B CAD Analysis TE-5937A RCIC Steam Leak Detection TE-5937B RCIC Steam Leak Detection TE-5937C RCIC Steam Leak Detection FPP 5.3-46 REV. 21, APRIL 2017
PBAPS FPP TE-5937D RCIC Steam Leak Detection TE-5938A RCIC Steam Leak Detection TE-5938B RCIC Steam Leak Detection TE-5938C RCIC Steam Leak Detection TE-5938D RCIC Steam Leak Detection TE-5939A RCIC Steam Leak Detection TE-5939B RCIC Steam Leak Detection TE-5939C RCIC Steam Leak Detection TE-5939D RCIC Steam Leak Detection TE-5942A HPCI Steam Leak Detection TE-5942B HPCI Steam Leak Detection TE-5942C HPCI Steam Leak Detection TE-5942D HPCI Steam Leak Detection TE-5943A HPCI Steam Leak Detection TE-5943B HPCI Steam Leak Detection TE-5943C HPCI Steam Leak Detection TE-5943D HPCI Steam Leak Detection DPIS3-14-81D Core Spray Minimum Flow DPIS3-14-81B Core Spray Minimum Flow DPIS3-14-81C Core Spray Minimum Flow DPIS3-14-81A Core Spray Minimum Flow (c) Postulated Fire in Area FPP 5.3-47 REV. 21, APRIL 2017
PBAPS FPP (1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is of the self-extinguishing type).
(2) Lube oil from core spray pumps either leaking onto the floor with subsequent ignition of the oil or an overheating of the pumps causing ignition of the oil.
(3) Since no combustible material is located in stairwell no.
23, the origin of a postulated fire in the area is indeterminate.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 12 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods A, B, and C for Unit 2 and shutdown method A for Unit 3 are either related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown methods A, B, and C for Unit 2 and shutdown method A for Unit 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost. Suppression pool indication is considered available via physical separation between redundant components and cables located in this fire area.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 12, shutdown methods A, B, and C will be available to safely shut down Unit 2 and shutdown method A will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations FPP 5.3-48 REV. 21, APRIL 2017
PBAPS FPP (1) An exemption from the requirements of Appendix R section III.G.2 was granted in an SER from the NRC dated March 13, 1985 (see reference 19 in Appendix C) for lack of suppression in the U3 torus area (room 37) elevation 91'-6" (fire area 12-13C). The basis for the exemption was physical separation between redundant safe shutdown components and cables and low combustible loading.
(2) An exemption from the requirements of Appendix R section III.G.2 was granted in an SER from the NRC dated March 13, 1985 (see reference 19 in Appendix C and sections 5.3.10.(f)(5) and 5.3.11.(f)(2)) for three gratings located in the floor of the U3 reactor building on elevation 135'-0" which is adjacent to fire area 12.
These gratings are located in fire area-zones 13S, 13S-20 (the neutron monitoring room) and in the CFZ in the west corridor between fire area-zones 13N and 13S. The basis for the exemption was low combustible loading and the fire protection features present.
(3) An engineering evaluation has been performed to allow replacement of a 2 foot thick concrete hatch plug with a hatch plug fabricated from structural steel and lightweight concrete (see reference 23 in Appendix C).
The new hatch plug provides separation commensurate with the hazards in the area.
(4) An exemption from the requirements of Appendix R Section III.G.2 was granted in an SER from the NRC dated March 13, 1985 for post fire manual operation of valves for a fire in this area.
5.3.10 Fire Area 13N: Unit 3 - North CRD Equipment Area, Drywell Access, North Isolation Valve Compartment (Elev. 135'-0");
Operating Area, Backwash Receiving Tank, Non-Regen Heat Exchanger Room, Regen Heat Exchanger Room, Cleanup Recirculation Pump Room, Isolation Valve Compartment, Transfer Pump Room (Elev. 165'-0")' Stairwell No. 31 (Elev. 165'-0" to 180'-0"); Valve Compartment (Elev. 180'-
0"); Reactor Building Ventilating Equipment Area, Prefilter and HEPA Filter Compartments, Holding Pump Compartments, Source Storage and Calibration (elev. 195'-
0"); Steam Separator and Steam Dryer Storage Pit (Elev.
209'-0"); Reactor Building Fan Room (Elev. 214'-0"); New Fuel Storage (Elev. 217'-0"); Washdown Area (Elev. 234'-
0").
FPP 5.3-49 REV. 21, APRIL 2017
PBAPS FPP (a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete (part 3-hr adjacent to fire area 10)
N - Reinforced concrete (part 2-hr adjacent to recombiner building; only fire area 13N is adjacent to the recombiner building)
N - Reinforced concrete (exterior wall none above elev. 176'-0")
E - Reinforced concrete (part 3-hr adjacent to fire area 50)
E - Reinforced concrete (part 2-hr adjacent to fire area 16)
E - Reinforced concrete (part adjacent 3-hr to fire area 50, elev. 195'-0")
E - Reinforced concrete (exterior wall, none elev. 234'-0")
S - Reinforced concrete (part 2-hr adjacent to fire area 16)
S - Reinforced concrete (parts 3-hr adjacent to fire areas 20, 25, and 26)
(part adjacent to fire area 20 contains an 84 sq ft steel blowout panel, unrated)
S - Reinforced concrete (part adjacent none to fire area 21 and exterior wall)
W - Reinforced concrete (exterior wall none W - Reinforced concrete (part adjacent 3-hr to fire area 10)
Floor: Reinforced concrete (elev. 135'-0") 3-hr (contains one 50 sq ft open grating in the CFZ between fire areas 13N and 13S in the west corridor which is adjacent to fire area 12, unrated)
(Two structural steel members adjacent to fire zone 12-13F will be coated with structural steel fire proofing.)
Reinforced concrete (area south of 3-hr column line 29, elev. 165'-0" Ceiling: Metal deck, nonreinforced concrete none FPP 5.3-50 REV. 21, APRIL 2017
PBAPS FPP and built-up roofing Access: Doors connecting to fire areas 10 and 16 Equipment access lock Two doors connecting to fire area 20 Door connecting to fire area 50 (b) Major Components in Fire Area MO2-10-017 RHR Shutdown Cooling Suction Valve MO3-10-025B RHR Recirc Loop B Return Valve MO3-10-026B RHR Drywell Spray MO3-14-011B Outboard Core Spray Discharge Valve MO3-14-012B Inboard Core Spray Discharge Valve MO3-23-016 Outboard HPCI Steam Supply Isolation Valve SV-9130A Backup N2 Supply Valve 30D11 HPCI Motor Control Center MCC30B37 3B Motor Control Center MCC30B39 3B Motor Control Center MCC30B80 3B/D Motor Control Center MCC30B82 3D/B Motor Control Center 30B10 3A Emergency Load Center 30B11 3B Emergency Load Center 30B12 3C Emergency Load Center 30B13 3D Emergency Load Center LT3-2-3-110A Reactor Water Level Transmitter LT3-2-3-61 Reactor Water Level Transmitter LT3-2-3-72A Reactor Water Level Transmitter FPP 5.3-51 REV. 21, APRIL 2017
PBAPS FPP MO3-12-056 RWCU To Condenser Hot Well MO3-12-68 RWCU to RCIC (Feedwater)
MO3-12-057 RWCU to Condenser Hot Well PT-9102A Drywell Pressure Transmitter PT-9102C Drywell Pressure Transmitter PT3-2-3-404A Reactor Pressure Transmitter PT3-6-53A Reactor Pressure Transmitter MO3-10-031B RHR Drywell Spray MO3-12-018 RWCU Containment Isolation Valve CV3-12-55 RWCU Pump Suction Flow Control Valve MO3-12-053 RWCU to Condenser Hot Well PT-3508A Drywell Pressure Transmitter PT-3508B Drywell Pressure Transmitter TE-5944A HPCI Steam Leak Det TE-5944B HPCI Steam Leak Det TE-5944C HPCI Steam Leak Det TE-5944D HPCI Steam Leak Det AO-3505 Cont Atmos Control AO-3969A Inst N2 Isolation FT-9130A Inst N2 Flow FT-9130B Inst N2 Flow LT3-02-3-73A Reactor Shroud Level Transmitter MO-3200A Drywell Cooling MO-3200B Drywell Cooling FPP 5.3-52 REV. 21, APRIL 2017
PBAPS FPP MO-3201A Drywell Cooling MO-3201B Drywell Cooling PT3-02-3-052C Core Spray/RHR Pressure Permissive PT-9142A Inst N2 PT-9142B Inst N2 SV3-03-32B CRD Drain and Isolation SV3-03-35B CRD Drain and Isolation SV-5966A CAD SV-5966B CAD SV-5966C CAD SV-5966D CAD SV-9101 CAD N310025B Motor Control Center DPIS3-02-116A Steam Line Flow DPIS3-02-116B Steam Line Flow DPIS3-02-117A Steam Line Flow DPIS3-02-117B Steam Line Flow DPIS3-02-118A Steam Line Flow DPIS3-02-118B Steam Line Flow DPIS3-02-119A Steam Line Flow DPIS3-02-119B Steam Line Flow LIS3-02-3-057A Main Steam and Feedwater LIS3-02-3-057B Main Steam and Feedwater FPP 5.3-53 REV. 21, APRIL 2017
PBAPS FPP LT3-02-3-072A Reactor Level Transmitter LT3-02-3-072B Reactor Level Transmitter LT3-02-3-072C Reactor Level Transmitter LT3-02-3-072D Reactor Level Transmitter LT3-02-3-099A Reactor Level Transmitter LT3-02-3-099B Reactor Level Transmitter LT3-02-03-101A Reactor Level Transmitter LT3-02-3-101B Reactor Level Transmitter PT3-02-3-052A Core Spray/RHR Pressure Permissive PT3-02-3-052B Core Spray/RHR Pressure Permissive PT3-02-3-404A Reactor Pressure Transmitter PT3-02-3-55A Reactor Pressure Transmitter PT3-05-12A Drywell Pressure Transmitter PT3-05-12B Drywell Pressure Transmitter PT3-10-100A Drywell Pressure Transmitter PT3-10-100B Drywell Pressure Transmitter PT3-10-100C Drywell Pressure Transmitter PT3-10-100D Drywell Pressure Transmitter SV-30465 SGTS Containment Isolation MO3-10-033 RHR Head Cooling SV-5948A CAD Supply SV-5949A CAD Supply AO-3506 Cont Atmos Control AO-3507 Cont Atmos Control FPP 5.3-54 REV. 21, APRIL 2017
PBAPS FPP AO-3509 Cont Atmos Control AO-3510 Cont Atmos Control AO-5235 Inst N Supply E/P-5957 CAD Analysis FIT-5957 CAD Analysis RE3-17-432A Reactor Building Vent Rad Monitor RE3-17-432B Reactor Building Vent Rad Monitor RE3-17-432C Reactor Building Vent Rad Monitor RE3-17-432D Reactor Building Vent Rad Monitor SV-5960B CAD Analysis SV-5961B CAD Analysis SV-9100 CAD Analysis SV-3671G CAD Analysis (c) Postulated Fire in Area (1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is of the self-extinguishing type).
(2) Since there are no combustible materials located in the north isolation valve room and the drywell access, the origin of a postulated fire is indeterminate.
(3) Since there are no combustibles in the heat exchanger rooms, pump rooms, and valve compartments, the origin of a postulated fire is indeterminate.
(4) Wood and paper with subsequent ignition from an external source.
(d) Consequence of Fire with Active Fire Suppression FPP 5.3-55 REV. 21, APRIL 2017
PBAPS FPP The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 13N contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods A, B, and C for Unit 2 and shutdown method A for Unit 3 are either related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown methods A, B, and C for Unit 2 and shutdown method A for Unit 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 13N, shutdown methods A, B, and C will be available to safely shut down Unit 2 and shutdown method A will be available to safely shut down Unit 3.
A postulated fire in the vicinity of the reactor vessel instrumentation reference leg backfill system could adversely affect reactor vessel water level indication due to reference leg density changes caused by an increase in water temperature.
Since there are no fire initiators in close proximity to the backfill system tubing, administratively controlled transient combustible free zones throughout the locations of the backfill system on elevations 135 feet and 165 feet in the reactor building will preclude any adverse effect on level indication, due to fire, prior to annunciation in the main control room.
Following annunciation in the main control room the backfill system will be administratively isolated from the reference legs.
(f) Exemption Requests and Evaluations (1) An exemption from Section III.G.2 of Appendix R was granted by the NRC in the SER dated December 31, 1986, for FPP 5.3-56 REV. 21, APRIL 2017
PBAPS FPP standby gas treatment system ductwork through 3-hour fire barriers without fire dampers. Inadvertent closure of dampers in two ducts through the floor of elevation 165 feet operating area could jeopardize secondary containment capability in the event of a reactor building isolation.
Combustible loading is low, and chance of transmission of smoke through the ducts is low.
(2) An exemption from the requirements of Appendix R Section III.G.2 was granted in an SER from the NRC dated March 13, 1985 (see reference 19 in Appendix C and section 5.3.11.(f)(3)) for the lack of automatic suppression throughout the area. The basis for the exemption is that Area 13N is separated from 13S by a CFZ on one side and an automatically actuated deluge water curtain and a CFZ on the other. Redundant safe shutdown components and cables are separated from each other via the CFZ.
Automatic detection is provided. An engineering analysis evaluates the CFZ with respect to the equipment credited for safe shutdown in Fire Areas 13S and 13N, demonstrating that the separation is equivalent to III.G.2 of 10CFR 50 Appendix R.
(3) An engineering evaluation has been performed to allow replacement of a 2 foot thick concrete hatch plug between fire area-zones12-13F and 13N-13H with a hatch plug fabricated from structural steel and lightweight concrete (see reference 23 in Appendix C). The new hatch plug provides separation commensurate with the hazards in the area.
(4) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated December 31, 1986 (see reference 18 in Appendix C and section 5.3.16.(f)(3)) for separation of cables and equipment and non-safety circuits of redundant trains by a fire barrier having a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rating. A steel blowout panel and labyrinth are provided for steam venting in the event of a high energy line break between fire areas 13N and 20 and between fire areas 20 and 50. There are no fixed combustibles in fire area 20. Operation of affected equipment in the MSIV room (room 254) occurs early in the safe shutdown scenario, and credited valves will not spuriously actuate.
(5) An exemption from the requirements of Appendix R section III.G.2 was granted in an SER from the NRC dated March FPP 5.3-57 REV. 21, APRIL 2017
PBAPS FPP 13, 1985 (see reference 19 in Appendix C and section 5.3.9.(f)(2)) for a grating located in the floor of the U3 reactor building on elevation 135'-0". This grating is located in the CFZ between fire areas 13N and 13S in the west corridor which is adjacent to fire area 12.
The basis for the exemption was low combustible loading and the fire protection features present.
(6) An exemption from the requirements of Appendix R,Section III.F was granted in an SER from the NRC, dated August 18, 2000, for the lack of fire detection in fire zones 13N-13M and 13N-36. The bases for the approval of the exemption in these two zones is minimal access to the rooms (since they are locked high radiation areas),
low combustible loading, and the location of redundant shutdown features (to those located in these zones) outside the fire zone.
(7) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated January 30, 2009. This exemption approved post fire operator manual actions that had been previously approved by the NRC in Fire Protection Safety Evaluation reports that were not originally part of the exemption request process. This process is addressed in RIS 2006-10.
(8) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated March 30, 2011. This exemption approved post fire operator manual actions that were not previously addressed in NRC approved Fire Protection Safety Evaluation Reports. The need to request this exemption is addressed in RIS 2006-10.
5.3.11 Fire Area 13S: Unit 3 - South CRD Equipment Area, South Isolation Valve Compartment, Neutron Monitoring Room, Corridors (Elev. 135'-
0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete (part none adjacent to fire area 21)
N - Reinforced concrete (part 3-hr FPP 5.3-58 REV. 21, APRIL 2017
PBAPS FPP adjacent to fire area 20)
E - Reinforced concrete (part 3-hr adjacent to fire area 50)
E - Reinforced concrete (part 2-hr adjacent to fire area 16)
S - Reinforced concrete (part 2-hr adjacent to fire area 16)
S - Reinforced concrete (parts 3-hr adjacent to fire areas 2 and 58)
W - Reinforced concrete (exterior wall none W - Reinforced concrete (part adjacent 3-hr to fire area 20)
Floor: Reinforced concrete(contains two open 3-hr gratings adjacent to fire area 12, 40 sq ft and 87 sq ft respectively, and a 50 sq ft open grating also adjacent to fire area 12 that is located in the CFZ between fire areas 13N and 13S in the west corridor, unrated)
One structural steel member adjacent to fire zone 12-13G will be coated with structural steel fire proofing.)
Ceiling: Reinforced concrete 3-hr Access: Door connecting to fire area 16 Corridors connecting to fire area 13N Door connecting to fire area 21 (b) Major Components in Fire Area MO3-10-025A RHR Recirc Loop A Return Valve MO3-10-026A RHR Drywell Spray MO3-10-031A RHR Drywell Spray SV-9130A Backup N2 Supply Valve 30Y32 Lighting Panel 30Y35 Distribution Panel 30S1048 Manual Power Transfer Switch for MCC30B383 LT3-2-3-110B Reactor Water Level Transmitter LT3-2-3-112 Reactor Water Level Transmitter LT3-2-3-70 Reactor Water Level Transmitter LT3-2-3-72B Reactor Water Level Transmitter MCC30B38 3C Motor Control Center MCC30B81 3C/A Motor Control Center FPP 5.3-59 REV. 21, APRIL 2017
PBAPS FPP MO3-14-011A Outboard Core Spray Discharge Valve MO3-14-012A Inboard Core Spray Discharge Valve PIT3-2-3-60B Reactor Pressure Indicator Transmitter PT-9102B Drywell Pressure Transmitter PT-9102D Drywell Pressure Transmitter PT-9458 Drywell Pressure Transmitter PT3-2-3-404B Reactor Pressure Transmitter PT3-6-105 Reactor Pressure Transmitter PT3-6-53B Reactor Pressure Transmitter AO-3520 Cont Atmos Control MO-3373 Recirc Pumps Clg Wtr Isol MO-3374 Recirc Pumps Clg Wtr Isol SV3-03-33 Scram Disch Vol Vent Isol SV3-03-36 Scram Disch Vol Vent Isol SV-5948B CAD Supply SV-5949B CAD Supply SV-9130B Instrument Nitrogen AO-3519 Cont N2 Purge AO-3521A Cont Atmos Control AO-3521B Cont Atmos Control AO-3523 Cont Atmos Control DPIS3-02-116C Steam Line Flow DPIS3-02-116D Steam Line Flow DPIS3-02-117C Steam Line Flow DPIS3-02-117D Steam Line Flow DPIS3-02-118C Steam Line Flow DPIS3-02-118D Steam Line Flow DPIS3-02-119C Steam Line Flow DPIS3-02-119D Steam Line Flow LIS3-02-3-058A Main Steam and Feedwater LIS3-02-3-058B Main Steam and Feedwater LT3-02-3-083A Reactor Low Water Level Transmitter LT3-02-3-083B Reactor Low Water Level Transmitter LT3-02-3-099C Reactor Low Water Level Transmitter LT3-02-3-099D Reactor Low Water Level Transmitter LT3-02-3-101C Reactor Low Water Level Transmitter LT3-02-3-101D Reactor Low Water Level Transmitter LT3-02-3-072D Reactor High Water Level Transmitter LT3-02-3-073B Reactor Shroud Low Level Transmitter PT3-02-3-052B Reactor Low Pressure Transmitter PT3-02-3-052D Reactor Low Pressure Transmitter PT3-02-3-404B Reactor Pressure Transmitter PT3-02-3-55C Reactor Pressure Transmitter PT3-02-3-55D Reactor Pressure Transmitter PT3-10-100B Drywell High Pressure Transmitter PT3-10-100D Drywell High Pressure Transmitter PT3-05-12C Drywell High Pressure Transmitter FPP 5.3-60 REV. 21, APRIL 2017
PBAPS FPP PT3-05-12D Drywell High Pressure Transmitter SV3-03-35B Scram Disch Vent Isol SV3-03-117 Control Rod Drive SV3-03-118 Control Rod Drive SV3-03-32A Scram Disch Vent Isol SV3-03-35A Scram Disch Vent Isol (c) Postulated Fire in Area (1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is of the self-extinguishing type).
(2) A boronated shield door in front of the access opening to the drywell with subsequent ignition from an outside source.
(3) Since there are no combustible materials located in the south isolation valve room and the neutron monitoring room, the origin of a postulated fire is indeterminate.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire annunciator in the main control room. Heat from a fire in the west corridor will cause heat detectors to activate which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room. When both heat detectors in the west corridor are activated, a deluge valve will open supplying water to the water curtain system's open sprinkler heads to extinguish the fire. Fire will be prevented from passing through the corridor and affecting fire area 13N.
(e) Effect of Fire on Safe Shutdown Fire Area 13S contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods A, B, and C for Unit 2 and shutdown method B for Unit 3 are either encapsulated by a qualified fire barrier, related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown methods A, B, and C for Unit 2 and shutdown method B for Unit 3 has redundant FPP 5.3-61 REV. 21, APRIL 2017
PBAPS FPP components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 13S, shutdown methods A, B, and C will be available to safely shut down Unit 2 and shutdown method B will be available to safely shut down Unit 3.
A postulated fire in the vicinity of the reactor vessel instrumentation reference leg backfill system could adversely affect reactor vessel water level indication due to reference leg density changes caused by an increase in water temperature.
Since there are no fire initiators in close proximity to the backfill system tubing, administratively controlled transient combustible free zones throughout the locations of the backfill system on elevations 135 feet and 165 feet in the reactor building will preclude any adverse effect on level indication, due to fire, prior to annunciation in the main control room.
Following annunciation in the main control room the backfill system will be administratively isolated from the reference legs.
(f) Exemption Requests and Evaluations (1) An exemption from Section III.G.2 of Appendix R was granted by the NRC in the SER dated December 31, 1986, for standby gas treatment system ductwork through 3-hour fire barriers without fire dampers. Inadvertent closure of dampers in two ducts through the floor of elevation 135 feet CRD area could jeopardize secondary containment capability in the event of a reactor building isolation.
Combustible loading is low, and chance of transmission of smoke through the ducts is low.
(2) An exemption from the requirements of Appendix R section III.G.2 was granted in an SER from the NRC dated March 13, 1985 (see reference 19 in Appendix C and section 5.3.9.(f)(2)) for three gratings located in the floor of the U3 reactor building on elevation 135'-0" which is adjacent to fire area 12. These gratings are located in fire area-zones 13S, 13S-20 (the neutron monitoring room) and in the CFZ in the west corridor between fire FPP 5.3-62 REV. 21, APRIL 2017
PBAPS FPP areas 13N and 13S. The basis for the exemption was low combustible loading and the fire protection features present.
(3) An exemption from the requirements of Appendix R Section III.G.2 was granted in an SER from the NRC dated March 13, 1985 (see reference 19 in Appendix C and section 5.3.10.(f)(2)) for the lack of automatic suppression throughout the area. The basis for the exemption is that Area 13N is separated from 13S by a CFZ on one side and an automatically actuated deluge water curtain and a CFZ on the other. Redundant safe shutdown components and cables are separated from each other via the CFZ.
Automatic detection is provided. An engineering analysis evaluates the CFZ with respect to the equipment credited for safe shutdown in Fire Areas 13S and 13N, demonstrating that the separation provided is equivalent to III.G.2 of 10CFR 50 Appendix R.
(4) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated January 30, 2009. This exemption approved post fire operator manual actions that had been previously approved by the NRC in Fire Protection Safety Evaluation reports that were not originally part of the exemption request process. This process is addressed in RIS 2006-10.
5.3.12 Fire Area 16: Unit 3 - Stairwell No. 22, Elevator Shaft (Elev. 91'-6" to 251'-8"); Elevator Machine Room (Elev. 251'-8").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 2-hr E - Reinforced concrete (part 3-hr adjacent to fire area 50)
E - Reinforced concrete (exterior wall 2-hr elev. 234'-0")
S - Reinforced concrete (parts adjacent 3-hr to fire areas 2 and 25, exterior wall; elev. 195'-0")
S - Reinforced concrete (exterior wall, 2-hr elev. 234'-0")
W - Reinforced concrete 2-hr FPP 5.3-63 REV. 21, APRIL 2017
PBAPS FPP Floor: Reinforced concrete foundation mat none Reinforced concrete (elevation machine 3-hr room)
Ceiling: Metal deck, nonreinforced concrete 3-hr and built-up roofing Access: Doors connecting to fire areas 2, 12, 13N, 13S, 25, and 50 (b) Major Components in Fire Area None.
(c) Postulated Fire in Area Since there are no combustibles present, the origin of postulated fire is indeterminate.
(d) Consequence of Fire with Active Fire Suppression Upon notification of a fire, the plant fire brigade will be dispatched to extinguish the fire.
(e) Effect of Fire on Safe Shutdown Fire Area 16 does not contain safe shutdown cables or equipment.
Offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 16, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) An exemption from Section III.G.2 of Appendix R was granted by the NRC in the SER dated December 31, 1986, for standby gas treatment system ductwork through 3-hour fire barriers without fire dampers. Inadvertent closure of dampers in two ducts through the north wall elevation 91'-
6" could jeopardize secondary containment capability in the event of a reactor building isolation.
FPP 5.3-64 REV. 21, APRIL 2017
PBAPS FPP Combustible loading is low, and chance of transmission of smoke through the ducts is low.
5.3.13 Fire Area 17: Unit 2 - MSIV Room (Elev. 135'-0")
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete (contains an 3-hr 84 sq ft steel blowout panel, unrated)
E - Reinforced concrete (contains a 3-hr 302 sq ft steel blowout panel, unrated)
S - Reinforced concrete 3-hr W - Reinforced concrete 3-hr Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Two doors connecting to fire area 6N (b) Major Components in Fire Area AO2-02-86A Outboard Main Steam Isolation Valve AO2-02-86B Outboard Main Steam Isolation Valve AO2-02-86C Outboard Main Steam Isolation Valve AO2-02-86D Outboard Main Steam Isolation Valve MO2-02-77 Main Steam Drain MO2-02-78 Main Steam Drain MO2-02-79 Main Steam Drain MO2-13-016 Outboard RCIC Steam Supply Isolation Valve MO2-13-021 Inboard RCIC Discharge Isolation Valve MO2-23-019 Inboard HPCI Pump Discharge Valve (c) Postulated Fire in Area Since the combustible materials located in this area result in only few seconds of fire severity, the origin of a postulated fire is indeterminate. A fire caused by external sources in this area is unlikely because of high radiation levels during plant operation.
(d) Consequence of Fire with Active Fire Suppression FPP 5.3-65 REV. 21, APRIL 2017
PBAPS FPP Upon notification of a fire, the plant fire brigade will be dispatched to extinguish the fire.
(e) Effect of Fire on Safe Shutdown Fire Area 17 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown method C for Unit 2 and shutdown methods A, B, and C for Unit 3 are related to equipment with redundant components not affected by a fire in this area. Equipment located in this fire area that is associated with shutdown method C for Unit 2 and shutdown methods A, B, and C for Unit 3 has redundant components that are not affected by a fire in this area.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 17, shutdown method C will be available to safely shut down Unit 2 and shutdown methods A, B, and C will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations (1) An exemption from Section III.F of Appendix R was granted by the NRC in the SER dated March 13, 1985, for lack of detection in this area. The basis for the exemption is the lack of combustible material in the area, the inaccessibility of the area during plant operation, and that equipment required for SSD Method 2C is not located in the area, or has redundant equipment located outside the area.
(2) An exemption from Section III.G of Appendix R was granted by the NRC in the SER dated December 31, 1986, for ductwork through 3-hour fire barriers without fire dampers. Inadvertent closure of a damper in the supply or exhaust ductwork could cause a MSIV closure and a resultant reactor transient.
(3) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated December 31, 1986 (see reference 18 in Appendix C and sections 5.3.5. (f)(5) and 5.3.40. (f)(2)) for separation of cables and equipment and non-safety circuits of redundant trains FPP 5.3-66 REV. 21, APRIL 2017
PBAPS FPP by a fire barrier having a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rating. A steel blowout panel and labyrinth are provided for steam venting in the event of a high energy line break between fire areas 6N and 17 and between fire areas 17 and 50. There are no fixed combustibles in fire area 17. Operation of affected equipment in the MSIV room (room 208) occurs early in the safe shutdown scenario, and credited valves will not spuriously actuate.
5.3.14 Fire Area 18: Unit 2 - Drywell Area (Elev. 116'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: Reinforced concrete none Floor: Reinforced concrete foundation mat none Ceiling: Reinforced concrete none Access: Access hatches connecting to fire areas 6N and 6S Door connecting to fire area 19 (b) Major Components in Fire Area AO2-02-80A Inboard Main Steam Isolation Valve AO2-02-80B Inboard Main Steam Isolation Valve AO2-02-80C Inboard Main Steam Isolation Valve AO2-02-80D Inboard Main Steam Isolation Valve AO2-10-163A Check Valve Bypass AO2-10-163B Check Valve Bypass AO2-14-15A Check Valve Bypass AO2-14-15B Check Valve Bypass MO2-02-029A Feedwater Injection Valve MO2-02-029B Feedwater Injection Valve MO2-02-053A Recirc Pump 2A Discharge Isolation Valve MO2-02-053B Recirc Pump 2B Discharge Isolation Valve MO2-02-74 Main Steam Drain MO2-10-018 RHR Shutdown Cooling Suction Valve MO2-12-015 RWCU Containment Isolation Valve MO2-13-015 Inboard RCIC Steam Supply Isolation Valve MO2-23-015 Inboard HPCI Steam Supply Isolation Valve POT2-02-071A SRV Acoustic Monitor POT2-02-071B SRV Acoustic Monitor FPP 5.3-67 REV. 21, APRIL 2017
PBAPS FPP POT2-02-071C SRV Acoustic Monitor POT2-02-071D SRV Acoustic Monitor POT2-02-071E SRV Acoustic Monitor POT2-02-071F SRV Acoustic Monitor POT2-02-071G SRV Acoustic Monitor POT2-02-071H SRV Acoustic Monitor POT2-02-071J SRV Acoustic Monitor POT2-02-071K SRV Acoustic Monitor POT2-02-071L SRV Acoustic Monitor RV2-02-070A Main Steam Line Safety Valve RV2-02-070B Main Steam Line Safety Valve RV2-02-071A Main Steam Relief Valve RV2-02-071B Main Steam Relief Valve RV2-02-071C Main Steam Relief Valve RV2-02-071D Main Steam Relief Valve RV2-02-071E Main Steam Relief Valve RV2-02-071F Main Steam Relief Valve RV2-02-071G Main Steam Relief Valve RV2-02-071H Main Steam Relief Valve RV2-02-071J Main Steam Relief Valve RV2-02-071K Main Steam Relief Valve RV2-02-071L Main Steam Relief Valve TE-2501-26 Drywell Temperature Element TE-2501-27 Drywell Temperature Element TE-2501-36A Drywell Temperature Element TE-2501-36B Drywell Temperature Element TE2-02-113A SRV Disc Temperature Element TE2-02-113B SRV Disc Temperature Element TE2-02-113C SRV Disc Temperature Element TE2-02-113D SRV Disc Temperature Element TE2-02-113E SRV Disc Temperature Element TE2-02-113F SRV Disc Temperature Element TE2-02-113G SRV Disc Temperature Element TE2-02-113H SRV Disc Temperature Element TE2-02-113J SRV Disc Temperature Element TE2-02-113K SRV Disc Temperature Element TE2-02-113L SRV Disc Temperature Element (c) Postulated Fire in Area (1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is of the self-extinguishing type).
(2) Lube oil from the recirculating pumps either leaking onto the floor with subsequent ignition of the oil or an FPP 5.3-68 REV. 21, APRIL 2017
PBAPS FPP overheating of the pumps causing ignition of the oil. A fire in this area during plant operation is extremely unlikely since the drywell is normally inerted with nitrogen.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire annunciator in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 18 contains safe shutdown cables and equipment.
Since Fire Area 18 has an inerted atmosphere during normal operation, no fire is postulated that is considered capable of affecting the safe shutdown cables and equipment.
5.3.15 Fire Area 19: Unit 2 - Control Rod Drive Area (Elev.
116'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: Reinforced concrete none Floor: Six-inch steel vessel encased by none concrete Ceiling: Reinforced concrete none Access: Door connecting to fire area 18 (b) Major Components in Fire Area Control rod drive mechanisms.
(c) Postulated Fire in Area Since there are no combustible materials in the control rod drive area, the origin of a postulated fire is indeterminate.
(d) Consequence of Fire with Active Fire Suppression FPP 5.3-69 REV. 21, APRIL 2017
PBAPS FPP The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire annunciator in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 19 does not contain safe shutdown cables or shutdown equipment.
Offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 19, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
5.3.16 Fire Area 20: Unit 3 - MSIV Room (Elev. 135'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete (contains an 3-hr 84 sq ft steel blowout panel, unrated)
E - Reinforced concrete (contains a 3-hr 302 sq ft steel blowout panel, unrated)
S - Reinforced concrete 3-hr W - Reinforced concrete none Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Two doors connecting to fire area 13N (b) Major Components in Fire Area AO3-02-86A Outboard Main Steam Isolation Valve AO3-02-86B Outboard Main Steam Isolation Valve AO3-02-86C Outboard Main Steam Isolation Valve AO3-02-86D Outboard Main Steam Isolation Valve MO3-02-77 Main Steam Drain MO3-02-78 Main Steam Drain MO3-02-79 Main Steam Drain MO3-13-016 Outboard RCIC Steam Supply Isolation Valve FPP 5.3-70 REV. 21, APRIL 2017
PBAPS FPP MO3-13-021 Inboard RCIC Discharge Isolation Valve MO3-23-019 Inboard HPCI Pump Discharge Valve MO3-2-038A Main Steam and Feedwater MO3-2-038B Main Steam and Feedwater MO3-12-068 RWCU Isolation Valve (c) Postulated Fire in Area Since there are no combustible materials in the MSIV room, the origin of a postulated fire is indeterminate. A fire caused by external sources in this area is extremely unlikely because of high radiation levels during plant operation.
(d) Consequence of Fire with Active Fire Suppression Upon notification of a fire, the plant fire brigade will be dispatched to extinguish the fire.
(e) Effect of Fire on Safe Shutdown Fire Area 20 contains safe shutdown cables and equipment.
Cables located in this area that are associated with shutdown methods A, B, and C for Unit 2 and shutdown method C for Unit 3 are associated with equipment that has redundant components not affected by a fire in this area. Equipment located in this area that is associated with shutdown methods A, B, and C for Unit 2 and shutdown method C for Unit 3 has redundant components not affected by a fire in this area.
Offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 20, shutdown methods A, B, and C will be available to safely shut down Unit 2 and shutdown method C will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations (1) An exemption to Section III.F of Appendix R was granted by the NRC in the SER dated March 13, 1985, for lack of detection in this area. The basis for the exemption is the lack of combustible material in the area, the inaccessibility of the area during plant operation, and that equipment required for SSD Method 3C is not located FPP 5.3-71 REV. 21, APRIL 2017
PBAPS FPP in the area, or has redundant equipment located outside the area.
(2) An exemption from Section III.G.2 of Appendix R was granted by the NRC in the SER dated December 31, 1986, for ductwork through 3-hour fire barriers without fire dampers. Inadvertent closure of a damper in the supply or exhaust ductwork could cause a MSIV closure and a resultant reactor transient.
(3) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated December 31, 1986 (see reference 18 in Appendix C and sections 5.3.10.(f)(4) and 5.3.40 (f)(2)) for separation of cables and equipment and non-safety circuits of redundant trains by a fire barrier having a 3 hour3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> rating. A steel blowout panel and labyrinth are provided for steam venting in the event of a high energy line break between fire areas 13N and 20 and between fire areas 20 and 50. There are no fixed combustibles in fire area 20. Operation of affected equipment in the MSIV room (room 254) occurs early in the safe shutdown scenario, and credited valves will not spuriously actuate.
5.3.17 Fire Area 21: Unit 3 - Drywell Area (Elev. 116'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: Reinforced concrete none Floor: Reinforced concrete foundation mat none Ceiling: Reinforced concrete none Access: Access hatches connecting to fire areas 13N, and 13S Door connecting to fire area 22 (b) Major Components in Fire Area AO3-02-80A Inboard Main Steam Isolation Valve AO3-02-80B Inboard Main Steam Isolation Valve AO3-02-80C Inboard Main Steam Isolation Valve AO3-02-80D Inboard Main Steam Isolation Valve FPP 5.3-72 REV. 21, APRIL 2017
PBAPS FPP AO3-10-163A Check Valve Bypass AO3-10-163B Check Valve Bypass AO3-14-15A Check Valve Bypass AP3-14-15B Check Valve Bypass MO3-02-029A Feedwater Injection Valve MO3-02-029B Feedwater Injection Valve MO3-02-053A Recirc Pump 3A Discharge Isolation Valve MO3-02-053B Recirc Pump 3B Discharge Isolation Valve MO3-02-74 Main Steam Drain MO3-10-018 RHR Shutdown Cooling Suction Valve MO3-12-015 RWCU Containment Isolation Valve MO3-13-015 Inboard RCIC Steam Supply Isolation Valve MO3-23-015 Inboard HPCI Steam Supply Isolation Valve POT3-02-071A SRV Acoustic Monitor POT3-02-071B SRV Acoustic Monitor POT3-02-071C SRV Acoustic Monitor POT3-02-071D SRV Acoustic Monitor POT3-02-071E SRV Acoustic Monitor POT3-02-071F SRV Acoustic Monitor POT3-02-071G SRV Acoustic Monitor POT3-02-071H SRV Acoustic Monitor POT3-02-071J SRV Acoustic Monitor POT3-02-071K SRV Acoustic Monitor POT3-02-071L SRV Acoustic Monitor RV3-02-070A Main Steam Line Safety Valve RV3-02-070B Main Steam Line Safety Valve RV3-02-070C Main Steam Line Safety Valve RV3-02-071A Main Steam Line Relief Valve RV3-02-071B Main Steam Line Relief Valve RV3-02-071C Main Steam Line Relief Valve RV3-02-071D Main Steam Line Relief Valve RV3-02-071E Main Steam Line Relief Valve RV3-02-071F Main Steam Line Relief Valve RV3-02-071G Main Steam Line Relief Valve RV3-02-071H Main Steam Line Relief Valve RV3-02-071J Main Steam Line Relief Valve RV3-02-071K Main Steam Line Relief Valve RV3-02-071L Main Steam Line Relief Valve TE-3501-26 Drywell Temperature Element TE-3501-27 Drywell Temperature Element TE-3501-36A Drywell Temperature Element TE-3501-36B Drywell Temperature Element TE-9455 Drywell Temperature Element TE3-02-113A SRV Disc Temperature Element TE3-02-113B SRV Disc Temperature Element TE3-02-113C SRV Disc Temperature Element TE3-02-113D SRV Disc Temperature Element FPP 5.3-73 REV. 21, APRIL 2017
PBAPS FPP TE3-02-113E SRV Disc Temperature Element TE3-02-113F SRV Disc Temperature Element TE3-02-113G SRV Disc Temperature Element TE3-02-113H SRV Disc Temperature Element TE3-02-113J SRV Disc Temperature Element TE3-02-113K SRV Disc Temperature Element TE3-02-113L SRV Disc Temperature Element TE3-2-320 SRV Discharge Temperature Element (c) Postulated Fire in Area (1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is of the self-extinguishing type).
(2) Lube oil from the recirculating pumps either leaking onto the floor with subsequent ignition of the oil or an overheating of the pumps causing ignition of the oil. A fire in this area during plant operation is extremely unlikely since the drywell is normally inerted with nitrogen.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire annunciator in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 21 contains safe shutdown cables and equipment.
Since Fire Area 21 has an inerted atmosphere during normal operation, no fire is postulated that is considered capable of affecting the safe shutdown cables and equipment.
5.3.18 Fire Area 22: Unit 3 - Control Rod Drive Area (Elev.
116'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: Reinforced concrete none Floor: Six-inch steel vessel encased by none concrete FPP 5.3-74 REV. 21, APRIL 2017
PBAPS FPP Ceiling: Reinforced concrete none Access: Door connecting to fire area 21 (b) Major Components in Fire Area Control rod drive mechanisms.
(c) Postulated Fire in Area Since there are no combustible materials in the control rod drive area, the origin of a postulated fire is indeterminate.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire annunciator in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 22 does not contain safe shutdown cables or shutdown equipment.
Offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 22, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
5.3.19 Fire Area 25: Cable Spreading Room (Elev. 150'-0"),
Computer Room (Elev. 150'-0"), Radwaste Building Fan Room, Control Room, Instrument Lab, Shop, Offices (Elev. 165'-
0")
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr E - Reinforced concrete 3-hr S - Reinforced concrete 3-hr W - Reinforced concrete (parts adjacent 3-hr to fire areas 27, 2, and 26)
W - Concrete masonry units (parts 3-hr FPP 5.3-75 REV. 21, APRIL 2017
PBAPS FPP adjacent to fire area 2)
Floor: Reinforced concrete 3-hr Reinforced concrete (control room) none(smoke and hot gas barrier)
Ceiling: Nonreinforced concrete and none built-up roofing Reinforced concrete between column lines 3-hour M-M and 18-23 (control room)
Access: Door connecting to fire area 27 Door connecting to fire area 2 Door connecting to fire area 26 Doors connecting to stairwell nos. 19 and 22 Six doors connecting to fire area 50 (b) Major Components in Fire Area Fire area 25 contains the controls, instrumentation, and logic for all the plant's major safety-related systems.
(c) Postulated Fire in Area (1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is of the self-extinguishing type or coated with fire proofing material).
(2) Wood with subsequent ignition from an external source.
(3) Paper used in procedures with subsequent ignition.
(4) Carpet with subsequent ignition from an external source.
(This is an unlikely event, however, because this carpet was specifically selected and tested to be resistant to ignition. Typically, carpet laid on a floor over concrete requires a well developed fire to ignite the carpet.)
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire annunciator in the main control room.
FPP 5.3-76 REV. 21, APRIL 2017
PBAPS FPP In the cable spreading room, a signal from one smoke detector, will cause an audible-visual alarm in the main control room.
Upon receipt of the alarm, the fire brigade will be dispatched to extinguish the fire. Fire dampers in HVAC openings above the doors into the cable spreading room will close when temperatures exceed 165oF. The system can be manually actuated by the fire brigade immediately outside the cable spreading room.
In the fan room, a fire in cable trays containing safety-related cable will activate line type heat detectors which will cause an audible-visual alarm in the main control room.
Upon receipt of the alarm, the fire brigade will be dispatched to extinguish the fire. A signal from a smoke detector or THE operation of the manual pull station located at the valve station will open a deluge valve to supplying water to the pre-action sprinkler system in the fan room.
Heat from a fire will cause the sprinkler heads(s) to fuse thus releasing water to control the fire.
In the control room, three cable trays above the false ceiling contain cable that is not IEEE-383 tested. These cables are covered with a fireproof coating. Line type heat detectors are provided in these trays. Heat from a fire in these trays will activate the heat detectors which will cause an audible-visual alarm annunciation at the fire alarm, the fire brigade will be dispatched to extinguish the fire. A total flooding of CO2 system can be manually activated at either the north or south end of the computer room inside the cable spreading room to extinguish the fire. Fire dampers in HVAC ducts are provided with automatic electric release devices to close the openings.
(e) Effect of Fire on Safe Shutdown Fire Area 25 contains safe shutdown cables and equipment.
Alternative shutdown capabilities (Method D) are available through the use of alternative shutdown panels, manual operator actions, and cable/raceway encapsulations.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses are presumed lost in accordance with Section III.L of Appendix R.
FPP 5.3-77 REV. 21, APRIL 2017
PBAPS FPP Therefore, for a fire in Fire Area 25, alternative shutdown method D will be available to safely shut down Units 2 and 3 from outside the Control Room.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C and section 5.3.2.(f)(2))for a steel angle between fire areas 02 and 25. A 4 inch high by 1/4 inch thick steel angle traverses the top of the wall between the two fire areas for its entire length. The basis for the exemption was the fire barrier geometry and combustible loading.
(2) An exemption was granted by the NRC from Section III.G.2 of Appendix R in an SER dated March 13, 1985, to allow in the cable spreading room
The two dampers in series are located in three places in the east and west walls. A single 1.5-hour damper is also located in three places in the east and west walls. Early warning fire detection is provided. The cable spreading room is provided with a total flooding CO2 system.
(3) An exemption was granted by the NRC in the SER dated March 13, 1985, from Section III.G.2 of Appendix R to allow two 1.5-hour-rated fire dampers in series in lieu of one 3-hour damper in the east and west walls in six separate locations in the remote shutdown panel area (fire zone 25-108A). Early warning fire detection is provided.
Combustible loading is low.
(4) An exemption was granted by the NRC in the SER dated March 13, 1985, from Section III.G.2 of Appendix R to allow two 1.5-hour-rated fire dampers in series in lieu of one 3-hour damper in the west wall of the control room (fire zone 25-108) in seven separate locations.
FPP 5.3-78 REV. 21, APRIL 2017
PBAPS FPP Early warning fire detection is provided. Combustible loading is low.
(5) An exemption for the requirements of Section III.G.2 of Appendix R was granted by the NRC in the SER dated December 31, 1986, for heating and ventilation ducts through a fire barrier without a 3-hour fire damper. The ducts penetrate the west wall of the remote shutdown panel area duct chase, elevation 150 feet and the radwaste building heating and ventilating compartment. The installation of a damper in either of the ducts would potentially contaminate clean radiological areas and expose workers to unacceptable radiation hazards.
Combustible loading in the area is low with most of the combustibles associated with cable tray near the ceiling of the remote shutdown panel area.
(6) An exemption was granted in the SER dated March 13, 1985, from the requirements of Appendix R,Section III.G.3 for a fixed suppression system in the control room. The control room is continuously occupied, protected with an automatic smoke detection system, and protected with portable fire extinguishers and manual hose stations adjacent to the control room entrances. Alternative shutdown capability will be provided outside the control room.
(7) NRC approval of the installation of carpeting in the main control room was granted in an SER dated October 10, 1985 (see reference 3 in Appendix C). Subsequent to receipt of the SER, clarification was provided in a letter from the licensee to the NRC dated May 29, 1986 (see reference 3 in Appendix C).
(8) In accordance with Generic Letter 86-10, a fire hazard analysis has been performed to demonstrate that the 10-gauge metal deck ceiling between areas 02 and 25 provides a fire resistance equivalent to that required by the barrier (see reference 10 in Appendix C and section 5.3.2(f)(1)). The analysis credits low combustible loading.
(9) The NRC approved a License Amendment Request and issued a Safety Evaluation on June 24, 2005, for changes to the PBAPS 2 & 3 Fire Protection Program. The modifications involved converting the exiting automatic carbon dioxide fire suppression systems installed in each of the four FPP 5.3-79 REV. 21, APRIL 2017
PBAPS FPP emergency diesel generator rooms and cable spreading room to manual actuation.
5.3.20 Fire Area 26: Unit 3 - M-G Set Ventilation Supply Fan Room (Elev. 165'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr E - Reinforced concrete 3-hr S - Reinforced concrete 3-hr W - Reinforced concrete (exterior wall none with louvered openings)
Floor: Reinforced concrete 3-hr Ceiling: Metal deck nonreinforced concrete none and built-up roofing Access: Door connecting to fire area 25 (b) Major Components in Fire Area None.
(c) Postulated Fire in Area Since there are no combustible materials in the area, the origin of a postulated fire is indeterminate.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire annunciator in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 26 contains safe shutdown cables but does not contain safe shutdown equipment.
Cables located in this fire area that are associated with shutdown methods A, B, and C for Unit 2 and shutdown methods A and C for Unit 3 are either related to equipment with redundant components not affected by a fire in this area, or FPP 5.3-80 REV. 21, APRIL 2017
PBAPS FPP related to equipment for which manual operator actions can be taken to recover any functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 or 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 26, shutdown methods A, B, and C will be available to safely shut down Unit 2 and shutdown methods A and C will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated January 30, 2009. This exemption approved post fire operator manual actions that had been previously approved by the NRC in Fire Protection Safety Evaluation reports that were not originally part of the exemption request process. This process is addressed in RIS 2006-10.
(2) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated March 30, 2011. This exemption approved post fire operator manual actions that were not previously addressed in NRC approved Fire Protection Safety Evaluation Reports. The need to request this exemption is addressed in RIS 2006-10.
5.3.21 Fire Area 27: Unit 2 - M-G Set Ventilation Supply Fan Room (Elev. 165'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr E - Reinforced concrete 3-hr S - Reinforced concrete 3-hr W - Reinforced concrete (exterior wall none with louvered openings)
Floor: Reinforced concrete 3-hr Ceiling: Metal deck nonreinforced concrete none and built-up roofing FPP 5.3-81 REV. 21, APRIL 2017
PBAPS FPP Access: Door connecting to fire area 25 (b) Major Components in Fire Area None.
(c) Postulated Fire in Area Since there are no combustible materials in the area, the origin of a postulated fire is indeterminate.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire annunciator in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 27 contains safe shutdown cables but does not contain safe shutdown equipment.
Cables located in this fire area that are associated with shutdown methods B and C for Unit 2 and shutdown methods A, B, and C for Unit 3 are either related to equipment with redundant components not affected by a fire in this area, or are related to equipment for which manual operator actions can be taken to recover any functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 27, shutdown methods B and C will be available to safely shut down Unit 2 and shutdown methods A, B, and C will be available to safely shut down Unit 3.
5.3.22 Fire Area 30: Battery Room 268 (Elev. 135'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr E - Reinforced concrete 3-hr FPP 5.3-82 REV. 21, APRIL 2017
PBAPS FPP S - Concrete masonry units 2-hr W - Concrete masonry units 2-hr Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Door connecting to fire area 31 Door connecting to fire area 50 (b) Major Components in Fire Area 3BD01 Station Battery 3BD18 Distribution Panel 3DD01 Station Battery (c) Postulated Fire in Area Ignition of electrical cabling from cables outside of conduit (an unlikely occurrence in the absence of a fire source external to the cabling since power cable is of the self-extinguishing type).
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire annunciator in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 30 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods A and C for Units 2 and 3 are either related to equipment with redundant components not affected by a fire in this area or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown methods A and C for Units 2 and 3 may have redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
FPP 5.3-83 REV. 21, APRIL 2017
PBAPS FPP The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses may be affected by a fire in this area.
Therefore, for a fire in Fire Area 30, shutdown methods A and C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rated block walls surrounding the fire area. The basis credits low combustible loading.
(2) An exemption was granted by the NRC in the SER dated March 13, 1985, from Section III.G.2 of Appendix R to allow two 1.5-hour-rated fire dampers in series in lieu of one 3-hour damper in the south wall. Early warning fire detection is provided. Combustible loading is low.
(3) An exemption was granted by the NRC in the SER dated December 31, 1986, from Appendix R,Section III.G.2 for protecting structural steel forming a part of or supporting fire barriers to provide fire resistance equivalent to that required of the barrier. Calculations indicate that critical steel temperatures will not be exceeded with one door open.
(4) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated March 30, 2011. This exemption approved post fire operator manual actions that were not previously addressed in NRC approved Fire Protection Safety Evaluation Reports. The need to request this exemption is addressed in RIS 2006-10.
5.3.23 Fire Area 31: Battery Room 266 (Elev. 135'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr E - Concrete masonry units 2-hr S - Concrete masonry units 2-hr W - Concrete masonry units 2-hr FPP 5.3-84 REV. 21, APRIL 2017
PBAPS FPP Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Door connecting to fire area 30 Door connecting to fire area 57 (b) Major Components in Fire Area 3AD01 3A Station Battery 3AD18 Distribution Panel 3CD01 Station Battery (c) Postulated Fire in Area Ignition of electrical cabling from cables outside of conduit (an unlikely occurrence in the absence of a fire source external to the cabling since power cable is of the self-extinguishing type).
(d) Consequence of Fire with Active Fire Suppression Smoke generated by a fire will be detected by smoke detectors located in the room which will cause an audible-visual alarm in the main control room. The smoke detectors also provide a permissive signal to the releasing panel supporting the pre-action sprinkler system in the room. The permissive signal from the smoke detectors in conjunction with a sprinkler fusing actuates the deluge valve and admits water to the piping to control the fire. The system can also be manually actuated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown Fire Area 31 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods B and C for Unit 2 and shutdown method B for Unit 3 are either encapsulated by a qualified fire barrier, related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that FPP 5.3-85 REV. 21, APRIL 2017
PBAPS FPP is associated with shutdown methods B and C for Unit 2 and shutdown method B for Unit 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses may be affected by a fire in this area.
Therefore, for a fire in Fire Area 31, shutdown methods B and C will be available to safely shut down Unit 2 and shutdown method B will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rated block walls surrounding the fire area. The basis credits low combustible loading.
(2) An exemption was granted by the NRC in the SER dated March 13, 1985, from Section III.G.2 of Appendix R to allow two 1.5-hour-rated fire dampers in series in lieu of one 3-hour damper in the east wall. Early warning fire detection is provided. Combustible loading is low.
(3) The basis for the exemption granted by the NCR for not protecting structural steel in the area in the SER dated December 31, 1986 (see reference 18 in Appendix C) was changed in the submittal to the NRC indicating completion of modification P00813 (see reference 26 in Appendix C). The new basis credits the pre-action sprinkler system installed in the area.
5.3.24 Fire Area 32: Emergency Switchgear Room 261 (Elev. 135'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Concrete masonry units 2-hr E - Concrete masonry units 2-hr S - Concrete masonry units 2-hr W - Concrete masonry units 2-hr FPP 5.3-86 REV. 21, APRIL 2017
PBAPS FPP Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Door connecting to fire area 57 Door connecting to fire area 33 (b) Major Components in Fire Area 30A17 3C Emergency Auxiliary Switchgear 3AD03-1,-2 Battery Charger 3CD03-1,-2 Battery Charger (c) Postulated Fire in Area Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since power cable is of the self-extinguishing type).
(d) Consequence of Fire with Active Fire Suppression Smoke generated by a fire will be detected by smoke detectors located in the room which will cause an audible-visual alarm in the main control room. The smoke detectors also provide a permissive signal to the releasing panel supporting the pre-action sprinkler system in the room. The permissive signal from the smoke detectors in conjunction with a sprinkler fusing actuates the deluge valve and admits water to the piping to control the fire. The system can also be manually actuated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown Fire Area 32 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods B and C for Unit 2 and shutdown method B for Unit 3 are either encapsulated by a qualified fire barrier, related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown methods B and C for Unit 2 and FPP 5.3-87 REV. 21, APRIL 2017
PBAPS FPP shutdown method B for Unit 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses may be affected by a fire in this area.
Therefore, for a fire in Fire Area 32, shutdown methods B and C will be available to safely shut down Unit 2 and shutdown method B will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rated block walls surrounding the fire area. The basis credits low combustible loading.
(2) An exemption was granted by the NRC in the SER dated March 13, 1985, from Section III.G.2 of Appendix R to allow two 1.5-hour-rated fire dampers in series in lieu of one 3-hour damper in the east wall. Early warning fire detection is provided. Combustible loading is low.
(3) The basis for the exemption granted by the NCR for not protecting structural steel in the area in the SER dated December 31, 1986 (see reference 18 in Appendix C) was changed in the submittal to the NRC indicating completion of modification P00813 (see reference 26 in Appendix C). The new basis credits the pre-action sprinkler system installed in the area.
(4) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the bus duct penetrating the walls in the fire area. The basis credits low combustible loading.
5.3.25 Fire Area 33: Emergency Switchgear Room 267 (Elev. 135'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating FPP 5.3-88 REV. 21, APRIL 2017
PBAPS FPP Walls: N - Concrete masonry units 2-hr E - Reinforced concrete 3-hr S - Concrete masonry units 2-hr W - Concrete masonry units 2-hr Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Door connecting to fire area 32 Door connecting to fire area 50 (b) Major Components in Fire Area 30A15 3A Emergency Auxiliary Switchgear 30S598 MO3-10-016A Automatic Power Transfer Switch MCC30B59 3A Motor Control Center (c) Postulated Fire in Area Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since power cable is of the self-extinguishing type).
(d) Consequence of Fire with Active Fire Suppression Smoke generated by a fire will be detected by smoke detectors located in the room which will cause an audible-visual alarm in the main control room. The smoke detectors also provide a permissive signal to the releasing panel supporting the pre-action sprinkler system in the room. The permissive signal from the smoke detectors in conjunction with a sprinkler fusing actuates the deluge valve and admits water to the piping to control the fire. The system can also be manually actuated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown Fire Area 33 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods B and C for Unit 2 and shutdown method C for Unit 3 are either encapsulated by a qualified fire barrier, FPP 5.3-89 REV. 21, APRIL 2017
PBAPS FPP related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown methods B and C for Unit 2 and shutdown method C for Unit 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses may be affected by a fire in this area.
Therefore, for a fire in Fire Area 33, shutdown methods B and C will be available to safely shut down Unit 2 and shutdown method C will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rated block walls surrounding the fire area. The basis credits low combustible loading.
(2) The basis for the exemption granted by the NCR for not protecting structural steel in the area in the SER dated December 31, 1986 (see reference 18 in Appendix C) was changed in the submittal to the NRC indicating completion of modification P00813 (see reference 26 in Appendix C). The new basis credits the pre-action sprinkler system installed in the area.
(3) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the bus duct penetrating the walls in the fire area. The basis credits low combustible loading.
5.3.26 Fire Area 34: Emergency Switchgear Room 265 (Elev. 135'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating FPP 5.3-90 REV. 21, APRIL 2017
PBAPS FPP Walls: N - Concrete masonry units 2-hr E - Concrete masonry units 2-hr S - Concrete masonry units 2-hr W - Concrete masonry units 2-hr Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Door connecting to fire area 57 Door connecting to fire area 35 (b) Major Components in Fire Area 30A18 3D Emergency Auxiliary Switchgear 3BD03-1,-2 Battery Charger 3DD03-1,-2 Battery Charger 3DD19X Fuse Box 3DD306 125 VDC Panel MCC00B50 480 V AC Motor Control Center (c) Postulated Fire in Area Ignition of electrical cabling from cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since power cable is of the self-extinguishing type).
(d) Consequence of Fire with Active Fire Suppression Smoke generated by a fire will be detected by smoke detectors located in the room which will cause an audible-visual alarm in the main control room. The smoke detectors also provide a permissive signal to the releasing panel supporting the pre-action sprinkler system in the room. The permissive signal from the smoke detectors in conjunction with a sprinkler fusing actuates the deluge valve and admits water to the piping to control the fire. The system can also be manually actuated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown FPP 5.3-91 REV. 21, APRIL 2017
PBAPS FPP Fire Area 34 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods A and C for Units 2 and 3 are either encapsulated by a qualified fire barrier, or related to equipment with redundant components not affected by a fire in this area. Equipment located in this fire area that is associated with shutdown methods A and C for Units 2 and 3 has redundant components that are not affected by a fire in this area.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses may be affected by a fire in this area.
Therefore, for a fire in Fire Area 34, shutdown methods A and C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rated block walls surrounding the fire area. The basis credits low combustible loading.
(2) An exemption was granted by the NRC in the SER dated March 13, 1985, from Section III.G.2 of Appendix R to allow two 1.5-hour-rated fire dampers in series in lieu of one 3-hour damper in the west wall. Early warning fire detection is provided. Combustible loading is low.
(3) The basis for the exemption granted by the NCR for not protecting structural steel in the area in the SER dated December 31, 1986 (see reference 18 in Appendix C) was changed in the submittal to the NRC indicating completion of modification P00813 (see reference 26 in Appendix C). The new basis credits the pre-action sprinkler system installed in the area.
(4) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the bus duct penetrating the walls in the fire area. The basis credits low combustible loading.
5.3.27 Fire Area 35: Emergency Switchgear Room 263 FPP 5.3-92 REV. 21, APRIL 2017
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Concrete masonry units 2-hr E - Reinforced concrete 3-hr S - Concrete masonry units 2-hr W - Concrete masonry units 2-hr Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Door connecting to fire area 34 Door connecting to fire area 50 (b) Major Components in Fire Area 30A16 3B Emergency Auxiliary Switchgear MCC30B60 3B Motor Control Center (c) Postulated Fire in Area Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since power cable is of the self-extinguishing type).
(d) Consequence of Fire with Active Fire Suppression Smoke generated by a fire will be detected by smoke detectors located in the room which will cause an audible-visual alarm in the main control room. The smoke detectors also provide a permissive signal to the releasing panel supporting the pre-action sprinkler system in the room. The permissive signal from the smoke detectors in conjunction with a sprinkler fusing actuates the deluge valve and admits water to the piping to control the fire. The system can also be manually actuated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown Fire Area 35 contains safe shutdown cables and equipment.
FPP 5.3-93 REV. 21, APRIL 2017
PBAPS FPP Cables located in this fire area that are associated with shutdown methods A and C for Unit 2 and shutdown method A for Unit 3 are either encapsulated by a qualified fire barrier, or related to equipment with redundant components not affected by a fire in this area. Equipment located in this fire area that is associated with shutdown methods A and C for Unit 2 and shutdown method A for Unit 3 has redundant components that are not affected by a fire in this area.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses may be affected by a fire in this area.
Therefore, for a fire in Fire Area 35, shutdown methods A and C will be available to safely shut down Unit 2, and shutdown method A will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rated block walls surrounding the fire area. The basis credits low combustible loading.
(2) The basis for the exemption granted by the NCR for not protecting structural steel in the area in the SER dated December 31, 1986 (see reference 18 in Appendix C) was changed in the submittal to the NRC indicating completion of modification P00813 (see reference 26 in Appendix C). The new basis credits the pre-action sprinkler system installed in the area.
(3) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the bus duct penetrating the walls in the fire area. The basis credits low combustible loading.
5.3.28 Fire Area 36: Emergency Switchgear Room 226 (Elev. 135'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Concrete masonry units 2-hr FPP 5.3-94 REV. 21, APRIL 2017
PBAPS FPP E - Concrete masonry units 2-hr S - Concrete masonry units 2-hr W - Concrete masonry units 2-hr Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Door connecting to fire area 57 Door connecting to fire area 37 (b) Major Components in Fire Area 20A18 2D Emergency Auxiliary Switchgear 2BD03-1,-2 Battery Charger 2DD03-1,-2 Battery Charger 20S598 MO-2-10-16D Automatic Power Transf./Isol. Switch (c) Postulated Fire in Area Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since power cable is of the self-extinguishing type).
(d) Consequence of Fire with Active Fire Suppression Smoke generated by a fire will be detected by smoke detectors located in the room which will cause an audible-visual alarm in the main control room. The smoke detectors also provide a permissive signal to the releasing panel supporting the pre-action sprinkler system in the room. The permissive signal from the smoke detectors in conjunction with a sprinkler fusing actuates the deluge valve and admits water to the piping to control the fire. The system can also be manually actuated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown Fire Area 36 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown method A for Units 2 and 3 are either encapsulated by a qualified fire barrier, related to equipment with FPP 5.3-95 REV. 21, APRIL 2017
PBAPS FPP redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown method A for Units 2 and 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses may be affected by a fire in this area.
Therefore, for a fire in Fire Area 36, shutdown method A will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rated block walls surrounding the fire area. The basis credits low combustible loading.
(2) An exemption was granted by the NRC in the SER dated March 13, 1985, from Section III.G.2 of Appendix R to allow two 1.5-hour-rated fire dampers in series in lieu of one 3-hour damper in the west wall. Early warning fire detection is provided. Combustible loading is low.
(3) The basis for the exemption granted by the NRC for not protecting structural steel in the area in the SER dated December 31, 1986 (see reference 18 in Appendix C) was changed in the submittal to the NRC indicating completion of modification P00813 (see reference 26 in Appendix C). The new basis credits the pre-action sprinkler system installed in the area.
(4) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the bus duct penetrating the walls in the fire area. The basis credits low combustible loading.
(5) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated March 30, 2011. This exemption approved post fire FPP 5.3-96 REV. 21, APRIL 2017
PBAPS FPP operator manual actions that were not previously addressed in NRC approved Fire Protection Safety Evaluation Reports. The need to request this exemption is addressed in RIS 2006-10.
5.3.29 Fire Area 37: Emergency Switchgear Room 231 (Elev. 135'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Concrete masonry units 2-hr E - Reinforced concrete 3-hr S - Concrete masonry units 2-hr W - Concrete masonry units 2-hr Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Door connecting to fire area 36 Door connecting to fire area 50 (b) Major Components in Fire Area 20A16 2B Emergency Auxiliary Switchgear 2BD306 Distribution Panel MCC20B60 2B Motor Control Center (c) Postulated Fire in Area Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since power cable is of the self-extinguishing type).
(d) Consequence of Fire with Active Fire Suppression Smoke generated by a fire will be detected by smoke detectors located in the room which will cause an audible-visual alarm in the main control room. The smoke detectors also provide a permissive signal to the releasing panel supporting the pre-action sprinkler system in the room. The permissive signal from the smoke detectors in conjunction with a sprinkler fusing actuates the deluge valve and admits water FPP 5.3-97 REV. 21, APRIL 2017
PBAPS FPP to the piping to control the fire. The system can also be manually actuated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown Fire Area 37 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown method A for Unit 2 and shutdown methods A and C for Unit 3 are either encapsulated by a qualified fire barrier, related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown method A for Unit 2 and shutdown methods A and C for Unit 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses may be affected by a fire in this area.
Therefore, for a fire in Fire Area 37, shutdown method A will be available to safely shut down Unit 2 and shutdown methods A and C will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rated block walls surrounding the fire area. The basis credits low combustible loading.
(2) The basis for the exemption granted by the NCR for not protecting structural steel in the area in the SER dated December 31, 1986 (see reference 18 in Appendix C) was changed in the submittal to the NRC indicating completion of modification P00813 (see reference 26 in Appendix C). The new basis credits the pre-action sprinkler system installed in the area.
(3) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated FPP 5.3-98 REV. 21, APRIL 2017
PBAPS FPP October 3, 1991 (see reference 20 in Appendix C) for the bus duct penetrating the walls in the fire area. The basis credits low combustible loading.
(4) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated March 30, 2011. This exemption approved post fire operator manual actions that were not previously addressed in NRC approved Fire Protection Safety Evaluation Reports. The need to request this exemption is addressed in RIS 2006-10.
5.3.30 Fire Area 38: Emergency Switchgear Room 217 (Elev. 135'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Concrete masonry units 2-hr E - Concrete masonry units 2-hr S - Concrete masonry units 2-hr W - Concrete masonry units 2-hr Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Door connecting to fire area 57 Door connecting to fire area 39 (b) Major Components in Fire Area 20A17 2C Emergency Auxiliary Switchgear 2AD03-1,-2 Battery Charger 2CD03-1,-2 Battery Charger (c) Postulated Fire in Area Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since power cable is of the self-extinguishing type).
(d) Consequence of Fire with Active Fire Suppression FPP 5.3-99 REV. 21, APRIL 2017
PBAPS FPP Smoke generated by a fire will be detected by smoke detectors located in the room which will cause an audible-visual alarm in the main control room. The smoke detectors also provide a permissive signal to the releasing panel supporting the pre-action sprinkler system in the room. The permissive signal from the smoke detectors in conjunction with a sprinkler fusing actuates the deluge valve and admits water to the piping to control the fire. The system can also be manually actuated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown Fire Area 38 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown method B for Unit 2 and shutdown methods B and C for Unit 3 are either encapsulated by a qualified fire barrier, related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown method B for Unit 2 and shutdown methods B and C for Unit 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses may be affected by a fire in this area.
Therefore, for a fire in Fire Area 38, shutdown method B will be available to safely shut down Unit 2 and shutdown methods B and C will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rated block walls surrounding the fire area. The basis credits low combustible loading.
(2) An exemption was granted by the NRC in the SER dated March 13, 1985, from Section III.G.2 of Appendix R to allow two 1.5-hour-rated fire dampers in series in lieu of one 3-FPP 5.3-100 REV. 21, APRIL 2017
PBAPS FPP hour damper in the west wall. Early warning fire detection is provided. Combustible loading is low.
(3) The basis for the exemption granted by the NCR for not protecting structural steel in the area in the SER dated December 31, 1986 (see reference 18 in Appendix C) was changed in the submittal to the NRC indicating completion of modification P00813 (see reference 26 in Appendix C). The new basis credits the pre-action sprinkler system installed in the area.
(4) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the bus duct penetrating the walls in the fire area. The basis credits low combustible loading.
(5) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated January 30, 2009. This exemption approved post fire operator manual actions that had been previously approved by the NRC in Fire Protection Safety Evaluation reports that were not originally part of the exemption request process. This process is addressed in RIS 2006-10.
5.3.31 Fire Area 39: Emergency Switchgear Room 227 (Elev. 135'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Concrete masonry units 2-hr E - Reinforced concrete 3-hr S - Concrete masonry units 2-hr W - Concrete masonry units 2-hr Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Door connecting to fire area 38 Door connecting to fire area 50 (b) Major Components in Fire Area FPP 5.3-101 REV. 21, APRIL 2017
PBAPS FPP 20A15 2A Emergency Auxiliary Switchgear MCC20B59 2A Motor Control Center (c) Postulated Fire in Area Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since power cable is of the self-extinguishing type).
(d) Consequence of Fire with Active Fire Suppression Smoke generated by a fire will be detected by smoke detectors located in the room which will cause an audible-visual alarm in the main control room. The smoke detectors also provide a permissive signal to the releasing panel supporting the pre-action sprinkler system in the room. The permissive signal from the smoke detectors in conjunction with a sprinkler fusing actuates the deluge valve and admits water to the piping to control the fire. The system can also be manually actuated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown Fire Area 39 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown method B for Unit 2 and shutdown methods B and C for Unit 3 are either encapsulated by a qualified fire barrier, or related to equipment with redundant components not affected by a fire in this area. Equipment located in this fire area that is associated with shutdown method B for Unit 2 and shutdown methods B and C for Unit 3 has redundant components that are not affected by a fire in this area.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses may be affected by a fire in this area.
Therefore, for a fire in Fire Area 39, shutdown method B will be available to safely shut down Unit 2, and shutdown methods B and C will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations FPP 5.3-102 REV. 21, APRIL 2017
PBAPS FPP (1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rated block walls surrounding the fire area. The basis credits low combustible loading.
(2) The basis for the exemption granted by the NCR for not protecting structural steel in the area in the SER dated December 31, 1986 (see reference 18 in Appendix C) was changed in the submittal to the NRC indicating completion of modification P00813 (see reference 26 in Appendix C). The new basis credits the pre-action sprinkler system installed in the area.
(3) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the bus duct penetrating the walls in the fire area. The basis credits low combustible loading.
5.3.32 Fire Area 40: Battery Room 225 (Elev. 135'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Concrete masonry units 2-hr E - Reinforced concrete 3-hr S - Reinforced concrete 3-hr W - Concrete masonry units 2-hr Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Door connecting to fire area 41 Door connecting to fire area 50 (b) Major Components in Fire Area 2BD01 2B Station Battery 2BD18 Distribution Panel 2DD01 Station Battery FPP 5.3-103 REV. 21, APRIL 2017
PBAPS FPP (c) Postulated Fire in Area Ignition of electrical cabling from cables outside of conduit (an unlikely occurrence in the absence of a fire source external to the cabling since power cable is of the self-extinguishing type).
(d) Consequence of Fire with Active Fire Suppression Smoke generated by a fire will be detected by smoke detectors located in the room which will cause an audible-visual alarm in the main control room. The smoke detectors also provide a permissive signal to the releasing panel supporting the pre-action sprinkler system in the room. The permissive signal from the smoke detectors in conjunction with a sprinkler fusing actuates the deluge valve and admits water to the piping to control the fire. The system can also be manually actuated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown Fire Area 40 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods A and C for Units 2 and 3 are either encapsulated by a qualified fire barrier, or related to equipment with redundant components not affected by a fire in this area. Equipment located in this fire area that is associated with shutdown methods A and C for Units 2 and 3 has redundant components that are not affected by a fire in this area.
The availability of offsite power to the 4kV switchgear via the 00A019 emergency auxiliary bus may be affected by a fire in this area. Offsite power to the 4kV switchgear via the 00A020 emergency auxiliary bus is not affected by a fire in this area.
Therefore, for a fire in Fire Area 40, shutdown methods A and C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the FPP 5.3-104 REV. 21, APRIL 2017
PBAPS FPP 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rated block walls surrounding the fire area. The basis credits low combustible loading.
(2) An exemption was granted by the NRC in the SER dated March 13, 1985, from Section III.G.2 of Appendix R to allow two 1.5-hour-rated fire dampers in series in lieu of one 3-hour damper in the north wall. Early warning fire detection is provided. Combustible loading is low.
(3) The basis for the exemption granted by the NCR for not protecting structural steel in the area in the SER dated December 31, 1986 (see reference 18 in Appendix C) was changed in the submittal to the NRC indicating completion of modification P00813 (see reference 26 in Appendix C). The new basis credits the pre-action sprinkler system installed in the area.
5.3.33 Fire Area 41: Battery Room, Room 218 (Elev. 135'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Concrete masonry units 2-hr E - Concrete masonry units 2-hr S - Reinforced concrete 3-hr W - Concrete masonry units 2-hr Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr Access: Door connecting to fire area 57 Door connecting to fire area 40 (b) Major Components in Fire Area 2AD01 2A Station Battery 2AD18 Distribution Panel 2CD01 2C Station Battery (c) Postulated Fire in Area Ignition of electrical cabling from cables outside of conduit (an unlikely occurrence in the absence of a fire source FPP 5.3-105 REV. 21, APRIL 2017
PBAPS FPP external to the cabling since power cable is of the self-extinguishing type).
(d) Consequence of Fire with Active Fire Suppression Smoke generated by a fire will be detected by smoke detectors located in the room which will cause an audible-visual alarm in the main control room. The smoke detectors also provide a permissive signal to the releasing panel supporting the pre-action sprinkler system in the room. The permissive signal from the smoke detectors in conjunction with a sprinkler fusing actuates the deluge valve and admits water to the piping to control the fire. The system can also be manually actuated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown Fire Area 41 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown method B for Unit 2 and shutdown methods B and C for Unit 3 are either encapsulated by a qualified fire barrier, or related to equipment with redundant components not affected by a fire in this area. Equipment located in this fire area that is associated with shutdown method B for Unit 2 and shutdown methods B and C for Unit 3 has redundant components that are not affected by a fire in this area.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses may be affected by a fire in this area.
Therefore, for a fire in Fire Area 41, shutdown method B will be available to safely shut down Unit 2, and shutdown methods B and C will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rated block walls surrounding the fire area. The basis credits low combustible loading.
(2) An exemption was granted by the NRC in the SER dated March 13, 1985, from Section III.G.2 of Appendix R to allow two FPP 5.3-106 REV. 21, APRIL 2017
PBAPS FPP 1.5-hour-rated fire dampers in series in lieu of one 3-hour damper in the north wall. Early warning fire detection is provided. Combustible loading is low.
(3) The basis for the exemption granted by the NCR for not protecting structural steel in the area in the SER dated December 31, 1986 (see reference 18 in Appendix C) was changed in the submittal to the NRC indicating completion of modification P00813 (see reference 26 in Appendix C). The new basis credits the pre-action sprinkler system installed in the area.
5.3.34 Fire Area 43: Diesel Generator Building Bay D (Elev. 127'-0" and 151'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete (exterior wall) none E - Reinforced concrete (exterior wall) none S - Reinforced concrete 3-hr W - Reinforced concrete (exterior wall) none Floor: Reinforced concrete foundation mat none Ceiling: Nonreinforced concrete and E.P.D.M Membrane none roofing Access: Two doors connecting to fire area 44 Two doors exiting building (b) Major Components in Fire Area 0DV64 E4 DG Building Vent Supply 0DV91 E4 DG Building Supply Fan 0DD13 Distribution Panel 0DG12 E4 Diesel Generator 0DP167 E4 Lube Oil Pump 0DP60 E4 Oil Transfer Pump MCC00B56 Motor Control Center FPP 5.3-107 REV. 21, APRIL 2017
PBAPS FPP 0DC216 DG Cardox Control Panel (c) Postulated Fire in Area (1) Fuel oil leaking onto the floor with subsequent ignition of the fuel.
(2) Lube oil leaking onto the floor with subsequent ignition of the fuel.
(d) Consequence of Fire with Active Fire Suppression Heat generated by a fire will activate heat detectors which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room. There are nine heat detectors in this diesel generator bay including one in the day tank room. A manually actuated, fixed, total flooding CO2 fire suppression system is provided in this diesel generator bay.
(e) Effect of Fire on Safe Shutdown Fire Area 43 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods A, B, and C for Unit 2 and shutdown methods A and C for Unit 3 are either related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown methods A, B, and C for Unit 2 and shutdown methods A and C for Unit 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses may be affected by a fire in this area.
Therefore, for a fire in Fire Area 43, shutdown methods A, B, and C will be available to safely shut down Unit 2 and shutdown methods A and C will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations FPP 5.3-108 REV. 21, APRIL 2017
PBAPS FPP (1) An exemption to Section III.F of Appendix R was granted by the NRC in the SER dated March 13, 1985, for lack of automatic fire detection in the ventilation supply enclosures of the diesel generator building. There are no fixed combustibles in the area.
(2) The NRC approved a License Amendment Request and issued a Safety Evaluation on June 24, 2005, for changes to the PBAPS 2 and 3 Fire Protection Program. The modifications involved converting the automatic carbon dioxide fire suppression systems installed in each of the four emergency diesel existing generator rooms and cable spreading room to manual actuation.
5.3.35 Fire Area 44: Diesel Generator Building Bay C (Elev.
127'-0" and 151'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr E - Reinforced concrete (exterior wall) none S - Reinforced concrete 3-hr W - Reinforced concrete (exterior wall) none Floor: Reinforced concrete foundation mat none Ceiling: Nonreinforced concrete and E.P.D.M. Membrane none roofing Access: Two doors connecting to fire area 43 One door connecting to fire area 45 Two doors exiting building (b) Major Components in Fire Area 0CV64 E3 DG Building Vent Supply 0CV91 E3 DG Building Supply Fan 0CD13 Distribution Panel 0CG12 E3 Diesel Generator FPP 5.3-109 REV. 21, APRIL 2017
PBAPS FPP 0CP167 E3 Lube Oil Pump 0CP60 E3 Oil Transfer Pump MCC00B55 Motor Control Center 0CC216 DG Cardox Control Panel (c) Postulated Fire in Area (1) Fuel oil leaking onto the floor with subsequent ignition of the fuel.
(2) Lube oil leaking onto the floor with subsequent ignition of the fuel.
(d) Consequence of Fire with Active Fire Suppression Heat generated by a fire will activate heat detectors which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room.
There are nine heat detectors in this diesel generator bay including one in the day tank room. A manually actuated, fixed, total flooding CO2 fire suppression system is provided in this diesel generator bay.
(e) Effect of Fire on Safe Shutdown Fire Area 44 contains safe shutdown cables and equipment.
Cables located in this area that are associated with shutdown methods B and C for Units 2 and 3 are associated with equipment that has redundant components not affected by a fire in this area. Equipment located in this area that is associated with shutdown methods B and C for Units 2 and 3 has redundant components not affected by a fire in this area.
Offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 44, shutdown methods B and C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations FPP 5.3-110 REV. 21, APRIL 2017
PBAPS FPP (1) An exemption to Section III.F of Appendix R was granted by the NRC in the SER dated March 13, 1985, for lack of automatic fire detection in the ventilation supply enclosures of the diesel generator building. There are no fixed combustibles in the area.
(2) The NRC approved a License Amendment Request and issued a Safety Evaluation on June 24, 2005, for changes to the PBAPS 2 and 3 Fire Protection Program. The modifications involved converting the automatic carbon dioxide fire suppression systems installed in each of the four emergency diesel existing generator rooms and cable spreading room to manual actuation.
5.3.36 Fire Area 45: Diesel Generator Building Bay B (Elev. 127'-0" and 151'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr E - Reinforced concrete (exterior wall) none S - Reinforced concrete 3-hr W - Reinforced concrete (exterior wall) none Floor: Reinforced concrete foundation mat none Ceiling: Nonreinforced concrete and E.P.D.M. Membrane none roofing Access: One door connecting to fire area 44 Two doors connecting to fire area 46 Two doors exiting building (b) Major Components in Fire Area 0BV64 E2 DG Building Vent Supply 0BV91 E2 DG Building Supply Fan 0BD13 Distribution Panel 0BG12 E2 Diesel Generator 0BP167 E2 Lube Oil Pump FPP 5.3-111 REV. 21, APRIL 2017
PBAPS FPP 0BP60 E2 Oil Transfer Pump MCC00B54 Motor Control Center 0BC216 DG Cardox Control Panel (c) Postulated Fire in Area (1) Fuel oil leaking onto the floor with subsequent ignition of the fuel.
(2) Lube oil leaking onto the floor with subsequent ignition of the fuel.
(d) Consequence of Fire with Active Fire Suppression Heat generated by a fire will activate heat detectors which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room.
There are nine heat detectors in this diesel generator bay including one in the day tank room. A manually actuated, fixed, total flooding CO2 fire suppression system is provided in this diesel generator bay.
(e) Effect of Fire on Safe Shutdown Fire Area 45 contains safe shutdown cables and equipment.
Cables located in this area that are associated with shutdown methods A and C for Units 2 and 3 are associated with equipment that has redundant components not affected by a fire in this area. Equipment located in this area that is associated with shutdown methods A and C for Units 2 and 3 has redundant components not affected by a fire in this area.
The availability of offsite power to the 4kV switchgear via the 00A019 emergency auxiliary bus may be affected by a fire in this area. Offsite power to the 4kV switchgear via the 00A020 emergency auxiliary bus is not affected by a fire in this area.
Therefore, for a fire in Fire Area 45, shutdown methods A and C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations FPP 5.3-112 REV. 21, APRIL 2017
PBAPS FPP (1) An exemption to Section III.F of Appendix R was granted by the NRC in the SER dated March 13, 1985, for lack of automatic fire detection in the ventilation supply enclosures of the diesel generator building. There are no fixed combustibles in the area.
(2) The NRC approved a License Amendment Request and issued a Safety Evaluation on June 24, 2005, for changes to the PBAPS 2 and 3 Fire Protection Program. The modifications involved converting the automatic carbon dioxide fire suppression systems installed in each of the four emergency diesel existing generator rooms and cable spreading room to manual actuation.
5.3.37 Fire Area 46: Diesel Generator Building Bay A (Elev.
127'-0" and 151'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr E - Reinforced concrete (exterior wall) none S - Reinforced concrete 3-hr W - Reinforced concrete (exterior wall) none Floor: Reinforced concrete foundation mat none Ceiling: Nonreinforced concrete and E.P.D.M. Membrane none roofing Access: Two doors connecting to fire area 45 One door connecting to fire area 54 Two doors exiting building (b) Major Components in Fire Area 0AV64 E1 DG Building Vent Supply 0AV91 E1 DG Building Supply Fan 0AD13 Distribution Panel 0AG12 E1 Diesel Generator 0AP167 E1 Lube Oil Pump FPP 5.3-113 REV. 21, APRIL 2017
PBAPS FPP 0AP60 E1 Oil Transfer Pump MCC00B53 Motor Control Center 0AC216 DG Cardox Control Panel (c) Postulated Fire in Area (1) Fuel oil leaking onto the floor with subsequent ignition of the fuel.
(2) Lube oil leaking onto the floor with subsequent ignition of the fuel.
(d) Consequence of Fire with Active Fire Suppression Heat generated by a fire will activate heat detectors which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room. There are nine heat detectors in this diesel generator bay including one in the day tank room. A manually actuated, fixed, total flooding CO2 fire suppression system is provided in this diesel generator bay.
(e) Effect of Fire on Safe Shutdown Fire Area 46 contains safe shutdown cables and equipment.
Cables located in this area that are associated with shutdown methods B and C for Units 2 and 3 are associated with equipment that has redundant components not affected by a fire in this area. Equipment located in this area that is associated with shutdown methods B and C for Units 2 and 3 has redundant components not affected by a fire in this area.
Offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 46, shutdown methods B and C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) An exemption to Section III.F of Appendix R was granted by the NRC in the SER dated March 13, 1985, for lack of automatic fire detection in the ventilation supply FPP 5.3-114 REV. 21, APRIL 2017
PBAPS FPP enclosures of the diesel generator building. There are no fixed combustibles in the area.
(2) The NRC approved a License Amendment Request and issued a Safety Evaluation on June 24, 2005, for changes to the PBAPS 2 and 3 Fire Protection Program. The modifications involved converting the automatic carbon dioxide fire suppression systems installed in each of the four emergency diesel existing generator rooms and cable spreading room to manual actuation.
5.3.38 Fire Area 47: Unit 3 - Pump Structure HPSW and ESW Room (Elev. 112'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr E - Reinforced concrete (exterior wall) none S - 1/4-inch-thich metal plate see exemption request W - Reinforced concrete (exterior wall) 3-hr no rating below elev. 116'-0")
Floor: Reinforced concrete foundation mat none Ceiling: Nonreinforced concrete and built-up roofing none Access: Door connecting to fire area 52 Door connecting to fire area 48 (b) Major Components in Fire Area 00P064 Motor Driven Fire Pump 0BP57 ESW Pump 3AP42 HPSW Pump 3BP42 HPSW Pump 3CP42 HPSW Pump 3DP427 HPSW Pump 516B HPSW Unit Intertie Valve FPP 5.3-115 REV. 21, APRIL 2017
PBAPS FPP MCC00B62 Motor Control Center, 480V AC MCC30B383 480V AC Motor Control Center Remote Starter MO-3344 HPSW Header Crosstie PT-0236B ESW Pump Discharge Pressure Transmitter PT-3330A HPSW Pressure Transmitter PT-3330B HPSW Pump Pressure Transmitter PT-3330C HPSW Pump Pressure Transmitter PT-3330D HPSW Pump Pressure Transmitter (c) Postulated Fire in Area (1) Deleted (2) Lube oil from the pumps either leaking onto the floor with subsequent ignition of the oil or an overheating of te pumps causing ignition of the oil.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause a audible-visual alarm annunciation at the fire alarm annunciator in the main control room. Heat generated by the fire will activate a heat detector which will cause an audible-visual annunciation at the fire alarm annunciator in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 47 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods A, B, and C for Units 2 and 3 are either related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown methods A, B, and C for Units 2 and 3 has redundant components that are not affected by a FPP 5.3-116 REV. 21, APRIL 2017
PBAPS FPP fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 47, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) An exemption from Appendix R section III.G.3 was granted in an NRC SER dated March 13, 1985 (see reference 19 in Appendix C and section 5.3.39.(f)(1)); however, the 1/4 inch thick steel wall between fire areas 48 and 47 was approved in an SER from the NRC dated May 23, 1979 (see reference 21 in Appendix C). Therefore, compliance with Appendix R section III.G.2 is achieved and an exemption from section III.G.3 is no longer required.
5.3.39 Fire Area 48: Unit 2 - Pump Structure HPSW and ESW Room (Elev. 112'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - 1/4-inch-thick metal plate see exemption request E - Concrete masonry units 2-hr E - Reinforced concrete (exterior wall) none S - Reinforced concrete 3-hr S - Concrete masonry units (part adjacent 2-hr to pump room)
W - Reinforced concrete (exterior wall) 3-hr Floor: Reinforced concrete foundation mat none Ceiling: Nonreinforced concrete and built-up roofing none Access: Door connecting to fire area 47 Two doors connecting to fire area 53 Door exiting building FPP 5.3-117 REV. 21, APRIL 2017
PBAPS FPP (b) Major Components in Fire Area OAP57 ESW Pump 2AP42 HPSW Pump 2BP42 HPSW Pump 2CP42 HPSW Pump 2DP42 HPSW Pump 516A HPSW Unit Intertie Valve MO-2344 HPSW Header Crosstie PT-0236A ESW Pump Discharge Pressure Transmitter PT-2330A HPSW Pressure Transmitter PT-2330B HPSW Pump Pressure Transmitter PT-2330C HPSW Pump Pressure Transmitter PT-2330D HPSW Pump Pressure Transmitter (c) Postulated Fire in Area (1) Deleted (2) Lube oil from the pumps either leaking onto the floor with subsequent ignition of the oil or an overheating of the pumps causing ignition of the oil.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause a audible-visual alarm annunciation at the fire alarm annunciator in the main control room. The heat generated by the fire will activate a heat detector which will cause an audible-visual annunciation at the fire alarm annunciator in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 48 contains safe shutdown cables and equipment.
FPP 5.3-118 REV. 21, APRIL 2017
PBAPS FPP Cables located in this fire area that are associated with shutdown methods A, B, and C for Units 2 and 3 are either related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown methods A, B, and C for Units 2 and 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 48, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) An exemption from Appendix R section III.G.3 was granted in an NRC SER dated March 13, 1985 (see reference 19 in Appendix C and section 5.3.38.(f)(1)); however, the 1/4 inch thick steel wall between fire areas 48 and 47 was approved in an SER from the NRC dated May 23, 1979 (see reference 21 in Appendix C). Therefore, compliance with Appendix R section III.G.2 is achieved and an exemption from section III.G.3 is no longer required.
5.3.40 Fire Area 50: Turbine Building (a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete (part adjacent 3-hr to fire area 2)
N - Reinforced concrete (exterior wall) none E - Reinforced concrete (exterior wall) none S - Reinforced concrete (exterior wall) none S - Reinforced concrete (part adjacent 3-hr to fire area 2)
W - Reinforced concrete (part adjacent to 3-hr fire areas 2, 5, 6N, 6S, 12, 13N, and 13S (J - line, below elev. 195'-0")
and 25; contains two 302 sq ft steel FPP 5.3-119 REV. 21, APRIL 2017
PBAPS FPP blowout panels, elev. 151', adjacent to areas 17 and 20 respectively, unrated -
see 5.3.40(f)(2))
W - Reinforced concrete (part above 3-hr elev. 195'-0"; adjacent to fire areas 6S and 13N and exterior wall)
Floor: Reinforced concrete foundation mat none Ceiling: Reinforced concrete (part adjacent to 3-hr emergency switchgear and battery rooms)
Metal deck, nonreinforced concrete and none built-up roofing Access: Twenty-six doors connecting turbine units and reactor units 2 and 3 Six doors exiting fire areas to outside (b) Major Components in Fire Area LT-2217 Condensate Storage Tank Water Level Transmitter LT-3217 Condensate Storage Tank Water Level Transmitter LT-9459 Condensate Storage Tank Water Level Transmitter 3OD08 DC Motor Control Center 2OD08 125 VDC Distribution Panel FT2-10-97A HPSW Flow Transmitter FT2-10-97B HPSW Flow Transmitter FT3-10-177 HPSW Flow Transmitter FT3-10-97A HPSW Flow Transmitter FT2-10-97B HPSW Flow Transmitter FT3-10-177 HPSW Flow Transmitter FT3-10-97A HPSW Flow Transmitter FT3-10-97B HPSW Flow Transmitter HV-3-27B-36034 Unit 3 Demin Return Header to or from Unit 3 CST FPP 5.3-120 REV. 21, APRIL 2017
PBAPS FPP (c) Postulated Fire in Area Fire area 50 is the turbine building, excluding the control structure. Combustible material is located throughout the area. Types of postulated fires are described below. For identification of which type of fire could occur in a given room, refer to Chapter 4.
(1) Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since power cable is of the self-extinguishing type).
(2) Lube oil from pumps, storage tanks, reservoirs, and conditioners leaking onto the floor with subsequent ignition of the oil.
(3) Ignition of trash.
(4) Wood and paper with subsequent ignition.
(5) The ignition of plastic from battery cases.
(6) Rubber and volatile chemicals with subsequent ignition in the chemistry laboratories.
(7) Cloth from rags in the janitor's room.
(d) Consequence of Fire with Active Fire Suppression Automatic fire detection is provided in the Unit 2 condensate pump pit area, condensate demineralizer pipe tunnels, valve operating areas, switchgear area, laboratories, corridor adjacent to feedwater heater rooms, and on the turbine deck above the turbine bearing lube oil lift pumps. The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room.
The 13.8 kV switchgear rooms, located in the center area of the turbine building at elevation 116 feet, are supervised with nitrogen and incorporate double interlock deluge valve that is maintained normally closed. Heat generated by a fire will melt the fusible link on the affected sprinkler heads at a predetermined temperature causing the nitrogen in the pipe to FPP 5.3-121 REV. 21, APRIL 2017
PBAPS FPP be released which activates an alarm light in the control room.
Sprinkler flow is initiated only when two separate inputs are received: one from a pneumatic actuator, due to the melting of the sprinkler fusible link(s) releasing the nitrogen; and the other from the fire detection system that sends a signal to an electronic solenoid valve.
Heat from a fire in the Unit 2 and 3 condenser areas, the area underneath the turbine decks, the moisture separator areas, or the feedwater heater platforms will cause the fusible link on the affected sprinkler heads to melt at a predetermined temperature. Water in the wet pipe sprinkler system will flow out through the opened heads to extinguish the fire.
Heat from a fire in any of the Unit 2 or 3 main turbine lube oil storage tanks and reservoir rooms will melt the fusible link on the affected sprinkler heads at a predetermined temperature, causing the sprinkler heads to open. Water in the wet pipe sprinkler system will flow out through the opened heads to extinguish the fire.
In addition, water curtain suppression systems are provided to the HELB vent path openings over doorways 87 and 171. These water curtain suppression systems are extensions of the existing sprinkler systems in the main turbine lube oil storage tank rooms at elevation 116-0. Heat generated by a fire on either side of the doorways will melt the fusible link on the affected sprinkler heads at a predetermined temperature, causing the sprinkler heads to open. Water in the wet pipe sprinkler system will flow out of the opened heads forming a water curtain to prevent the propagation of the fire through the openings.
Heat generated by a fire in the laydown areas in the center of the turbine building below either elevation 165 feet or 135 feet will melt the fusible link on the affected sprinkler heads at a predetermined temperature, causing the sprinkler heads to open. Water in the wet pipe sprinkler system will flow out the opened sprinkler to control the fire.
In the 13.2 kV switchgear areas on elevation 116-0, smoke generated by a fire will be detected by smoke detectors located in the area which will cause an audible-visual alarm in the main control room. Upon receipt of the alarm the fire brigade will be dispatched to the area. The smoke detectors also provide a permissive signal to the releasing panel supporting the pre-action sprinkler system in the area. The FPP 5.3-122 REV. 21, APRIL 2017
PBAPS FPP permissive signal from the smoke detectors in conjunction with a sprinkler fusing actuates the deluge valve and admits water to the piping to control the fire. The system can also be manually actuated by the fire brigade to supply water to the sprinklers.
Heat generated by a fire in the Clean Clothes Room will cause will melt the fusible link on the affected sprinkler heads at a predetermined temperature, causing the sprinkler heads to open.
Water in the wet pipe sprinkler system will flow out of the opened heads to extinguish the fire.
Heat generated by a fire near the hydrogen seal oil units will activate a heat detector. A signal from the heat detector will actuate a deluge valve causing water to flow out of open heads above the hydrogen seal oil units. The fire brigade can manually release the deluge valve on elevation 116 feet in the turbine building laydown area to extinguish the fire.
Heat generated by a fire in the generator equipment area on elevation 135 feet will melt the fusible link on the affected sprinkler heads at a predetermined temperature. Water in the wet pipe sprinkler system will flow out of the opened heads to extinguish the fire. Heat generated by a fire in the reactor feed pump turbine lube oil reservoir on elevations 135 feet and 150 feet will melt the fusible link on the affected sprinkler heads at a predetermined temperature. Water from the wet pipe sprinkler system will flow out of the opened heads to extinguish the fire.
Heat generated by a fire in the drummed lube oil storage room will melt the fusible link on the affected sprinkler heads at a predetermined temperature. Water from the wet pipe sprinkler system will flow out of the opened heads to extinguish the fire.
Heat generated by a fire west of the feedwater heater platforms in each unit will melt the fusible link on the affected sprinkler heads at a predetermined temperature. Water from the wet pipe sprinkler system will flow out of the opened heads to extinguish the fire. Heat generated by a fire above the platform east of the cable spreading room will melt the fusible link on the affected sprinkler heads at a predetermined temperature. Water in the wet pipe sprinkler system will flow out of the opened heads to extinguish the fire.
FPP 5.3-123 REV. 21, APRIL 2017
PBAPS FPP Heat generated by a fire in the reactor feed pump turbine areas on elevation 165 feet will melt the fusible link on the affected sprinkler heads at a predetermined temperature, causing the sprinkler heads to open. Water in the wet pipe sprinkler system will flow out of the opened heads to extinguish the fire.
Heat generated by a fire under the turbine lagging will melt the fusible link on the affected sprinkler heads at a predetermined temperature, causing the sprinkler heads to open.
The dry pipe sprinkler system is pressurized with nitrogen.
When a sprinkler head opens, pressure in the system decreases causing an annunciation in the main control room. The fire brigade would then determine if the system should be manually actuated to extinguish the fire.
Heat generated by a fire at the turbine bearings, generator bearings, or front standard will melt the fusible link on the affected sprinkler heads at a predetermined temperature, causing the sprinkler heads to open. Water from the wet pipe sprinkler system will flow out of the opened heads to control the fire.
Heat generated by a fire in the H2 Water Chemistry valve station area or within the H2 injection point shrouds will activate a heat detector. The signal from the heat detector will cause an annunciation in the control room.
(e) Effect of Fire on Safe Shutdown Fire Area 50 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown method A for Units 2 and 3 are either encapsulated by a qualified fire barrier, related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown method A for Units 2 and 3 may have redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 emergency auxiliary bus is not affected by a fire in this area. Offsite power to the 4kV switchgear via the FPP 5.3-124 REV. 21, APRIL 2017
PBAPS FPP 00A020 emergency auxiliary bus may be affected by a fire in this area.
Therefore, for a fire in Fire Area 50, shutdown method A will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) An exemption from Section III.F of Appendix R was granted by the NRC for lack of detection in the offgas pipe tunnels. The only safety-related equipment in the room is cable inside conduit. There are no fixed combustibles, and the area is inaccessible at power due to high radiation.
(2) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated December 31, 1986, for separation of cables and equipment and associated non-safety circuits of redundant trains by a fire barrier having a 3-hour rating (see reference 18 in Appendix C and sections 5.3.13.(f)(3) and 5.3.16.(f)(3)). A steel blowout panel and labyrinth are provided for steam venting in the event of a high energy line break. There are no fixed combustibles in fire areas 17 and 20. Operation of the affected equipment in the MSIV rooms occurs early in the FSSD scenario, and no spurious actuation in the room can affect valve positioning.
(3) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated December 31, 1986 (see reference 18 in Appendix C and section 5.3.6 (f)(2)), to provide fixed suppression.
The exemption credits the substantial barrier provided by the wall and the distance between credited components on either side. Subsequently, the barrier was evaluated and determined to be adequate for the fire hazard.
(4) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C and section 5.3.46.(f)(1)) for the lack of fire seals in two duct chases located in the floor of elevation 135'-0" in the emergency switchgear rooms. The basis for the exemption was the low combustible loading and the existing fire protection features.
FPP 5.3-125 REV. 21, APRIL 2017
PBAPS FPP (5) An exemption from the requirements of Appendix R,Section III.F was granted by the NRC in the SER dated August 18, 2000 for the lack of fire detection in fire zones: 50-78A (rooms 414 and 457),50-78B (rooms 135, 184, 185, 228, 229, and 274),50-78V(rooms 181 and 272),50-78W (rooms 22, 138, and 223), 50-78EE (room 177), 50-88 (room 139), and 50-89 (room 179). The bases for the approval of the exemption request in these areas fall into two groups. For fire zone 50-78EE, unit 3 steam air ejector room, the bases sited by the exemption request for approval was minimal access to the room (locked high radiation room), low combustible loading, and the location of redundant shutdown features (to those located in this zone) outside the fire zone. For the remaining zones, the bases was existing automatic suppression systems installed within the zones and the separation of required post-fire safe shutdown functions to other fire areas.
(6) An exemption from the requirements of Appendix R,Section III.F was granted by the NRC in a Safety Evaluation Report dated December 7, 2001 for the lack of fire detection in fire zones50-78B, (Elevation 165 Common Area Turbine Building) and 50-99, (Unit 2 Feedwater Heater Room, elevation 135). The basis for the approval of the exemption request for these fire zones is provided for each zone separately. For Zone 50-78B, Room 429, the exemption approval is based on the spatial separation of the conduits of interest to the significant in-situ fire hazards of over 30 feet, as well as high ceilings. For zone 50-99, Room 222, the exemption approval is based on minimal access (locked high radiation area), the use of fire resistive cables and the addition of the cable tray covers to the ceiling.
(7) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated January 30, 2009. This exemption approved post fire operator manual actions that had been previously approved by the NRC in Fire Protection Safety Evaluation reports that were not originally part of the exemption request process. This process is addressed in RIS 2006-10.
(8) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated FPP 5.3-126 REV. 21, APRIL 2017
PBAPS FPP March 30, 2011. This exemption approved post fire operator manual actions that were not previously addressed in NRC approved Fire Protection Safety Evaluation Reports. The need to request this exemption is addressed in RIS 2006-10.
5.3.41 Fire Area 51: Emergency Cooling Towers; Platform (Elev.
125'-0"); Switchgear Rooms, Cooling Water Pump Room (Elev. 153'-0")
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete none E - Reinforced concrete (exterior wall) none S - Reinforced concrete (exterior wall) none W - Reinforced concrete none Floor: Reinforced concrete none Ceiling: Lightweight concrete roofing none Access: Door connecting to stairway no. 1 Door connecting to cooling tower fan rooms (b) Major Components in Fire Area 0AK32 Emerg Cooling Tower Fan 0BK32 Emerg Cooling Tower Fan 0CK32 Emerg Cooling Tower Fan MCC00B97 Emerg Cooling Tower Motor Control Center MCC00B98 Emerg Cooling Tower Motor Control Center MCC00B99 Emerg Cooling Tower Motor Control Center MCC00B96 Emerg Cooling Tower Motor Load Center MCC00B95 Emerg Cooling Tower Motor Load Center MCC00B94 Emerg Cooling Tower Motor Load Center 00P186 Emerg Cooling Water Pump FPP 5.3-127 REV. 21, APRIL 2017
PBAPS FPP MO-0841 Emerg Cooling Water Pump Discharge MO-501A ESW Disch to Reservoir MO-501B ESW Disch to Reservoir MO-501C ESW Disch to Reservoir MO-502A HPSW Disch to Reservoir MO-502B HPSW Disch to Reservoir MO-502C HPSW Disch to Reservoir MO-2804A Reservoir Flow to Pump Bay MO-2804B Reservoir Flow to Pump Bay MO-3804A Reservoir Flow to Pump Bay MO-3804B Reservoir Flow to Pump Bay (c) Postulated Fire in Area Lube oil leaking from the cooling water pump with subsequent ignition of oil in pump room. No fixed combustibles in remaining rooms, so origin of fire is indeterminate.
(d) Consequence of Fire with Active Fire Suppression The heat generated by a fire will activate heat detectors which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 51 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods A, B, and C for Units 2 and 3 are related to equipment with redundant components not affected by a fire in this area. Equipment located in this fire area that is associated with shutdown methods A, B, and C for Units 2 and 3 has redundant components that are not affected by a fire in this area.
FPP 5.3-128 REV. 21, APRIL 2017
PBAPS FPP Offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 51, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) An exemption to Section III.F of Appendix R was granted by the NRC in the SER dated November 14, 1986, for lack of automatic fire detection into the emergency cooling tower stairway. There are no fixed combustibles located in the area. Entrance into the stairway is controlled by a locked fence gate. The only safety-related equipment is cable in conduit.
5.3.42 Fire Area 52: Unit 3 - North Circulating Water Pump Structure Bay (Elev. 112'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Precast concrete panels (exterior wall) none E - Precast concrete panels (exterior wall) none S - Reinforced concrete 3-hr W - Precast concrete panels (exterior wall) none Floor: Reinforced concrete foundation mat none Ceiling: Metal deck, nonreinforced concrete and none built-up roofing Access: Door connecting to fire area 47 Two doors exiting building (b) Major Components in Fire Area 3AP002 Circulating Water Pump 3BP002 Circulating Water Pump 3CP002 Circulating Water Pump (c) Postulated Fire in Area FPP 5.3-129 REV. 21, APRIL 2017
PBAPS FPP Lube oil from the circulating water pumps leaking onto the floor with subsequent ignition of the oil.
(d) Consequence of Fire with Active Fire Suppression The heat generated by a fire will activate heat detectors which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room. Upon receipt of the alarm in the control room, the plant fire brigade will be dispatched to extinguish the fire.
(e) Effect of Fire on Safe Shutdown Fire Area 52 contains safe shutdown cables but does not contain safe shutdown equipment.
Cables located in this fire area that are associated with shutdown methods A, B, and C for Units 2 and 3 are related to equipment with redundant components not affected by a fire in this area.
Offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 52, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
5.3.43 Fire Area 53: Unit 2 - South Circulating Water Pump Structure Bay Diesel Fire Pump Room (Elev. 112'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr N - Concrete masonry units 2-hr (part in zone 145)
E - Precast concrete panels (exterior wall) none S - Precast concrete panels (exterior wall) none W - Precast concrete panels (exterior wall) none W - Concrete masonry units 2-hr Floor: Reinforced concrete foundation mat none Ceiling: Metal deck, nonreinforced concrete and none FPP 5.3-130 REV. 21, APRIL 2017
PBAPS FPP built-up roofing Access: Door connecting to fire area 48 Two doors exiting building (b) Major Components in Fire Area 00P064 Diesel Driven Fire Pump 2AP002 Circulating Water Pump 2BP002 Circulating Water Pump 2CP002 Circulating Water Pump (c) Postulated Fire in Area (1) Lube oil from the circulating water pumps leaking onto the floor with subsequent ignition of the oil.
(2) Fuel oil in the pump room spilling onto the floor with subsequent ignition.
(d) Consequence of Fire with Active Fire Suppression The heat generated by a fire will activate heat detectors which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room. Upon receipt of the alarm in the control room, the plant fire brigade will be dispatched to extinguish the fire. In the pump room, heat will melt the fusible link on the affected wet pipe sprinkler heads at a predetermined temperature, causing the sprinkler heads to open and extinguish the fire.
(e) Effect of Fire on Safe Shutdown Fire Area 53 contains safe shutdown cables but does not contain safe shutdown equipment.
Cables located in this fire area that are associated with shutdown methods A, B, and C for Units 2 and 3 are related to equipment with redundant components not affected by a fire in this area.
Offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 53, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
FPP 5.3-131 REV. 21, APRIL 2017
PBAPS FPP 5.3.44 Fire Area 54: Diesel Generator Building Cardox Room (Elev. 127'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr E - Reinforced concrete (exterior wall) none S - Reinforced concrete (exterior wall) none W - Reinforced concrete (exterior wall) none Floor: Reinforced concrete foundation mat none Ceiling: Nonreinforced concrete and built-up roofing none Access: Two doors exiting building Door connecting to fire area 46 (b) Major Components in Fire Area 0AP163 Emergency Service Water Booster Pump 0BP163 Emergency Service Water Booster Pump MO-0498 ESW Discharge Valve MO-2486 HPSW Discharge to Reservoir MO-2803 HPSW Discharge to Reservoir MO-3486 HPSW Discharge to Reservoir MO-3803 HPSW Discharge to Reservoir (c) Postulated Fire in Area Lube oil from the emergency cooling tower booster pumps leaking onto the floor with subsequent ignition of the oil.
(d) Consequence of Fire with Active Fire Suppression The smoke generated by a fire will activate smoke detectors which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room.
FPP 5.3-132 REV. 21, APRIL 2017
PBAPS FPP (e) Effect of Fire on Safe Shutdown Fire Area 54 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods A, B, and C for Units 2 and 3 are either related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown methods A, B, and C for Units 2 and 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 54, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations (1) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated January 30, 2009. This exemption approved post fire operator manual actions that had been previously approved by the NRC in Fire Protection Safety Evaluation reports that were not originally part of the exemption request process. This process is addressed in RIS 2006-10.
5.3.45 Fire Area 55: Circulating Water Screen Structure (Elev. 116'-0").
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Precast concrete panels none (exterior wall)
E - Reinforced concrete, precast none concrete panels (exterior wall)
S - Precast concrete panels none (exterior wall)
W - Reinforced concrete, precast none concrete panels (exterior wall)
FPP 5.3-133 REV. 21, APRIL 2017
PBAPS FPP Floor: Reinforced concrete foundation mat none Ceiling: Metal deck, nonreinforced concrete and none built-up roofing Access: Four doors exiting building (b) Major Components in Fire Area MO-2233A Sluice Gate MO-2233B Sluice Gate MO-3233A Sluice Gate MO-3233B Sluice Gate (c) Postulated Fire in Area Lubricating grease which has been ignited by an external source.
(d) Consequence of Fire with Active Fire Suppression Heat generated by a fire will activate heat detectors which will cause an audible-visual alarm annunciation at the fire alarm annunciator in the main control room.
(e) Effect of Fire on Safe Shutdown Fire Area 55 contains safe shutdown cables and equipment.
Cables located in this area that are associated with shutdown methods A, B, and C for Units 2 and 3 are associated with equipment that has redundant components not affected by a fire in this area. Equipment located in this area that is associated with shutdown methods A, B, and C for Units 2 and 3 has redundant components not affected by a fire in this area.
Offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses is not affected by a fire in this area.
Therefore, for a fire in Fire Area 55, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
FPP 5.3-134 REV. 21, APRIL 2017
PBAPS FPP 5.3.46 Fire Area 57: Switchgear Corridor, Room 262 (Elevation 135-0).
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr S - Reinforced concrete 3-hr E - Concrete Masonry 2-hr see 5.3.46.(f)(4)
W - Reinforced Concrete 3-hr Floor: Reinforced concrete 3-hr see 5.3.46.(f)(3)
Ceiling: Reinforced concrete 3-hr see 5.3.46.(f)(3)
Access: Door connecting to fire area 2 Door connecting to fire area 4 Door connecting to fire area 31 Door connecting to fire area 32 Door connecting to fire area 34 Door connecting to fire area 36 Door connecting to fire area 38 Door connecting to fire area 41 2 doors connecting to fire area 50 Door connecting to fire area 58 (b) Major Components in Fire Area None (c) Postulated Fire in Area Ignition of electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is self-extinguishing). The area is designated as a transient combustible free zone as a result of the IPEEE fire risk analysis (see reference 22 in Appendix C) which further limits the potential for introducing combustibles into the area.
(d) Consequence of Fire with Active Fire Suppression FPP 5.3-135 REV. 21, APRIL 2017
PBAPS FPP Smoke generated by a fire will be detected by smoke detectors located in the room which will cause an audible-visual alarm in the main control room. The smoke detectors also provide a permissive signal to the releasing panel supporting the pre-action sprinkler system in the room. The permissive signal from the smoke detectors in conjunction with a sprinkler fusing actuates the deluge valve and admits water to the piping to control the fire. The system can also be manually actuated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown Fire Area 57 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown method C for Units 2 and 3 are either encapsulated by a qualified fire barrier, related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown method C for Units 2 and 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
The availability of offsite power to the 4kV switchgear via the 00A019 and 00A020 emergency auxiliary buses may be affected by a fire in this area.
Therefore, for a fire in Fire Area 57, shutdown method C will be available to safely shut down Units 2 and 3.
(f) Exemption Requests and Evaluations NOTE: Prior to October 1999, Fire Area 57 was part of Fire Area 02. It has been separated from Fire Area 02 by upgrading barriers.
(1) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C and section 5.3.40.(f)(4)) for the lack of fire seals in two duct chases located in the floor of elevation 135'-0" in the emergency switchgear rooms. The basis for the FPP 5.3-136 REV. 21, APRIL 2017
PBAPS FPP exemption was the low combustible loading and existing fire protection features.
(2) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> rated block walls on the East side of the fire area. The basis credits low combustible loading.
(3) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated March 13, 1985 (see reference 19 in Appendix C) to allow a single 1.5-hour fire damper in lieu of a 3-hour-rated damper in the west wall of the emergency switchgear duct chase. Early warning detection is provided.
Combustible loading is low.
(4) An exemption from the requirements of Appendix R, section III.G.2 was granted by the NRC in the SER dated December 31, 1986 (see reference 18 in Appendix C) for two 1.5-hour-rated dampers in series in lieu of one 3-hour-rated damper in three locations in the emergency switchgear duct chase. Early warning fire detection is provided. Combustible loading is low.
(5) An exemption from the requirements of Appendix R, section III.G.2 was grated by the NRC in the SER dated October 3, 1991 (see reference 20 in Appendix C) for the bus duct penetrating the walls between the corridor and the switchgear rooms, and the corridor and the Unit 2 M-G Set room. The basis credits low combustible loading.
(6) An evaluation was done for the bus duct penetrating the wall between fire areas 02 and 57. The evaluation determined that the barrier is adequate for the fire hazard. The basis credits low combustible loading.
(7) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated January 30, 2009. This exemption approved post fire operator manual actions that had been previously approved by the NRC in Fire Protection Safety Evaluation reports that were not originally part of the exemption request process. This process is addressed in RIS 2006-10.
5.3.47 Fire Area 58: Unit 3 - M-G Set Room, Room 258 FPP 5.3-137 REV. 21, APRIL 2017
(a) Structural and Architectural Design Features of Fire Area Construction Rating Walls: N - Reinforced concrete 3-hr S - Reinforced concrete 3-hr E - Reinforced concrete 3-hr W - Reinforced concrete 3-hr Floor: Reinforced concrete 3-hr Ceiling: Reinforced concrete 3-hr see 5.3.47.(f)(1)
Access: Door connecting to fire area 2 Door connecting to fire area 57 (b) Major Components in Fire Area 30C04BX HPCI Alternative Control Station 30H06 Reactor Recirculation M-G Set Hoist 3AC150 Instrument Transfer Cubicle 3AC151 Exciter And Field Breaker Cubicle 3AC152 Voltage Regulator Relay Panel 3AC63 3A M-G Set B Lube Oil Instrument Rack 3AE22 Reactor Recirculation M-G Set A Oil Cooler 3AG02 3A RPS M-G Set 3AG04 3A Reactor Recirculation Pump M-G Set (Abandoned in place per ECR 13-00338, Rev. 0) 3AS331 Radiation Monitor For HPSW 3BC150 Instrument Transfer Cubicle 3BC151 Exciter And Field Breaker Cubicle 3BC152 Voltage Regulator Relay Panel 3BC63 3B M-G Set B Lube Oil Instrument Rack 3BE22 Reactor Recirculation M-G Set B Oil Cooler 3BG02 3B RPS M-G Set 3BG04 3B Reactor Recirculation Pump M-G Set (Abandoned in place per ECR 13-000338, Rev. 0) 3BS331 Radiation Monitor For HPSW DPI3-10-179 RHR/HPSW Differential Pressure Indicator FI3-10-177 HPSW Flow Indicator FI3-10-178 RHR Flow Indicator FI3-23-141 HPCI Flow Indicator LI3-2-3-112 Reactor Water Level Indicator FPP 5.3-138 REV. 21, APRIL 2017
PBAPS FPP LI-9456 Suppression Pool Water Level Indicator LI-9459 Condensate Storage Tank Water Level Indicator MCC30B324 480 Vac Motor Control Center Remote Starter MCC30B325 480 Vac Motor Control Center Remote Starter MCC30B338 MCC for Valve MO3-10-016A PI3-23-142 HPCI Pump Discharge Pressure Indicator PI3-2-3-60B Reactor Pressure Indicator PI-9458 Drywell Pressure Indicator PI-9466 ESW Pump Discharge Pressure Indicator SPI-5505X HPCI Turbine Speed Indicator TI3-2-320 SRV Discharge Temperature Indicator TI-9455 Drywell Temperature Indicator TI-9457 Suppression Pool Temperature Indicator (c) Postulated Fire in Area (1) Ignition of exposed electrical cabling in cable trays (an unlikely occurrence in the absence of a fire source external to the cabling since it is self-extinguishing).
(2) Deleted.
(d) Consequence of Fire with Active Fire Suppression A signal from any smoke detector in the M-G set room will open a deluge valve, thus supplying water under pressure to closed sprinklers located above the M-G sets. A fire under the sprinkler system will cause the sprinklers to fuse and control the fire. The system can be manually activated by the fire brigade to supply water to the sprinklers.
(e) Effect of Fire on Safe Shutdown Fire Area 58 contains safe shutdown cables and equipment.
Cables located in this fire area that are associated with shutdown methods A, B, and C for Unit 2 and shutdown method C for Unit 3 are either encapsulated by a qualified fire barrier, related to equipment with redundant components not affected by a fire in this area, or related to equipment for which manual operator actions can be taken to recover any functions that could be lost. Equipment located in this fire area that is associated with shutdown methods A, B, and C for Unit 2 and shutdown method C for Unit 3 has redundant components that are not affected by a fire in this area, or manual operator actions can be taken to recover any essential functions that could be lost.
FPP 5.3-139 REV. 21, APRIL 2017
PBAPS FPP The availability of offsite power to the 4kV switchgear via the 00A019 emergency auxiliary bus is not affected by a fire in this area. Offsite power to the 4kV switchgear via the 00A020 emergency auxiliary bus may be affected by a fire in this area.
Therefore, for a fire in Fire Area 58, shutdown methods A, B, and C will be available to safely shut down Unit 2 and shutdown method C will be available to safely shut down Unit 3.
(f) Exemption Requests and Evaluations NOTE: Prior to October 1999, Fire Area 58 was part of Fire Area 02. It has been separated from Fire Area 02 by upgrading barriers.
(1) An exemption from Appendix R,Section III.G.2 was granted by the NRC in the SER dated December 31, 1986, for protecting structural steel forming a part of or supporting fire barriers to provide fire resistance equivalent to that required of the barrier. The existing sprinkler system in the M-G set room fire area 58 (formerly 2-12C) provides floor area coverage for an oil fire only. A fire from combustibles other than oil which could adversely affect the steel is not considered credible, since it is unlikely that two supervised doors will be open at once.
(2) ECR-NCR 99-02669 addresses the acceptability of a 1.5 hour5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> rated fire door in the stairwell barrier that separates the M-G set room (fire area 58) from Star tower 25 (fire area 2). The acceptability is based in part on the normal use of 1.5 hour5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> rated doors in stair towers.
(3) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated January 30, 2009. This exemption approved post fire operator manual actions that had been previously approved by the NRC in Fire Protection Safety Evaluation reports that were not originally part of the exemption request process. This process is addressed in RIS 2006-10.
FPP 5.3-140 REV. 21, APRIL 2017
PBAPS FPP (4) An exemption from the requirements of Appendix R,Section III.G.2 was granted by the NRC in a letter dated March 30, 2011. This exemption approved post fire operator manual actions that were not previously addressed in NRC approved Fire Protection Safety Evaluation Reports. The need to request this exemption is addressed in RIS 2006-10.
FPP 5.3-141 REV. 21, APRIL 2017
PBAPS FPP CHAPTER 6 SPECIAL TOPICS 6.1 ANALYSIS OF ASSOCIATED CIRCUITS Generic Letter 81-12, issued by the NRC on February 20, 1981, provided guidance for the reassessment of the plant's fire protection features for compliance with 10 CFR 50, Appendix R, Section III.G. One of the enclosures to Generic Letter 81-12 addressed the subject of associated circuits and the possibility that fire-induced damage to associated circuits could prevent operation or cause maloperation of the shutdown methods designated to be used in the event of a fire in the plant. Subsequently, on March 22, 1982, the NRC issued a memorandum to provide additional clarification on the staff's requirements. This clarification memorandum further defined associated circuits of concern as those cables (either safety-related or nonsafety-related) that have a physical separation from the equipment and cables of the redundant safe shutdown methods that is less than that required by Section III.G.2 of Appendix R and also have any of the following:
- a. A common power source with the shutdown equipment, and the power source is not electrically protected from the circuit of concern by coordinated breakers, fuses, or similar devices.
- b. A connection to circuits of equipment whose spurious operation would adversely affect the shutdown capability.
- c. A common enclosure with the shutdown cables, and
- are not electrically protected by circuit breakers, fuses or similar devices (Type 1), or
- will allow propagation of the fire into the common enclosure (Type 2).
In accordance with guidance contained in Generic Letter 81-12, an analysis has been performed for Peach Bottom to verify that fire-induced damage to associated circuits will not jeopardize the plant's safe shutdown capability. This analysis utilizes a systems approach, wherein the features of circuit design, such as overcurrent protection, are evaluated together with cable routing and separation criteria in order to confirm the adequacy of the electrical system design to prevent fire-induced damage to non-safe shutdown circuits from jeopardizing safe shutdown capability. This FPP 6.1-1 REV. 21, APRIL 2017
PBAPS FPP methodology and results of the analysis are summarized in the following sections.
6.1.1 Associated Circuits Involving Common Power Sources Power delivery to electrical systems and components that are relied on for post-fire safe shutdown and associated circuits is provided by the Class 1E AC distribution system or the Class 1E DC distribution system. The source of power may be the Onsite Class 1E standby power supplies or the Offsite non-Class 1E power supplies feeding Class 1E buses via the non-Class 1E 13kV distribution system, as described hereinafter. Individual Class 1E and non-Class 1E circuits that are fed by Class 1E power distribution systems are protected by coordinated, Class 1E, fault-actuated protective devices. PBAPS actively maintains coordination studies that use protective device time-current characteristic curves to demonstrate coordination exists between protective devices. These time-current characteristic curves are typical for each type of protective device and application that is represented. The time-current characteristic curves show that for each voltage level, the individual circuit breakers or fuses will clear a fault prior to the operation of the source breaker or fuse protecting the source bus.
Consequently, the coordinated, fault-actuated protective devices will act to isolate the circuit with a fire-induced fault without jeopardizing the availability of other circuits connected to the same power source. The coordination study calculations also evaluate exceptions to coordination and conclude that the exceptions do not adversely impact the PBAPS post-fire safe shutdown capabilities.
Non-Class 1E Offsite power delivered via non-Class 1E onsite 13kV distribution circuits may be credited as the power supply for the Class 1E AC distribution system for fire areas that do not require Alternative Shutdown and for which the circuits from the offsite source(s) to the 4kv switchgear are not affected by fire damage.
Coordinated, fault-actuated protective devices protect individual Class 1E circuits energized from non-Class 1E power supply systems.
Coordinated, fault-actuated protective devices protect individual Class 1E circuits energized from non-Class 1E power supply systems.
Coordinated, fault-actuated protective over-current devices protect individual 230kV and 13kV non-Class 1E, off-site startup circuits from the 230kV substation to the Class 1E 4kV distribution system.
Because of the use of coordinated, fault-actuated protective devices as described above, Peach Bottom does not have a concern with associated circuits involving common power sources, as defined by Generic Letter 81-12.
FPP 6.1-2 REV. 21, APRIL 2017
PBAPS FPP Generic Letter 86-10, Question 5.3.8, addresses the effect of fire induced high impedance faults on the source protection of a common power source. When the high impedance fault phenomenon occurs simultaneously on associated non-safe shutdown circuits, the combined total current generated may be sufficient to trip the source overcurrent protection for the bus, thereby removing power from the shutdown loads.
Peach Bottom actively maintains a multiple high impedance fault calculation to determine if fire-induced, multiple high impedance faults could cause the loss of any power source which supplies safe shutdown loads and is needed for the specific shutdown method(s) relied upon for a given fire. The results and conclusions derived in this calculation are considered in the individual fire area analyses. The multiple high impedance fault calculation and the associated fire area analyses demonstrate that the PBAPS post-fire safe shutdown capability for both units will not be jeopardized due to fire-induced multiple high impedance faults.
6.1.2 Associated Circuits Involving Spurious Operation Components whose spurious operation could adversely affect the shutdown capability are considered to be essential for safe shutdown of the plant. These components, and the circuits that could cause their spurious operation, are therefore treated as safe shutdown components.
Additionally, circuits whose failure could adversely affect the shutdown capability are considered to be safe shutdown circuits.
These circuits include both those whose failure could prevent operation of a safe shutdown component or those whose failure could cause operation under an undesired condition or mode of operation.
The safe shutdown analysis, as presented in Chapter 5, demonstrates that at least one method of safe shutdown remains available to shut the plant down in the event of a fire.
Because of the design and analysis approach described above, Peach Bottom does not have a concern with associated circuits involving spurious operation, as defined by Generic Letter 81-12.
6.1.3 Associated Circuits Involving Common Enclosures and Raceways Separation between the different divisions of Class 1E circuits and between Class 1E and non-Class 1E circuits is discussed in UFSAR Section 7.1.6. Class 1E cables are only routed in raceways FPP 6.1-3 REV. 21, APRIL 2017
PBAPS FPP designated as Class 1E. With exceptions, such as certain process and diagnostic instrumentation and the components of the offsite power sources to the 4kV emergency buses, the majority of safe shutdown components are Class 1E equipment. Non-Class 1E circuits, designated as associated circuits in accordance with IEEE Standard 384, may be routed in one channel of Class 1E raceways. Non-Class 1E cables identified and treated as Class 1E do not become associated with other Class 1E channels. The potential for propagation of an electrical fire in enclosures (either raceways or panels) containing Class 1E cables is minimized by the selection of appropriate cable construction systems and by the provision of physical separation. Insulation and jacketing materials used in both Class 1E and non-Class 1E cables are flame retardant.
As discussed in Section 6.1.1, circuits relied on for post-fire safe shutdown and their associated circuits are energized from Class 1E power supply systems and individually protected by coordinated, fault-actuated protective devices. In addition, circuits energized from non-Class 1E power supply systems (offsite sources and onsite 13kV distribution system) are individually protected by coordinated, fault-actuated protective devices. This protection ensures that faulted circuits in common enclosures will be isolated, and faults will not propagate outside of the fire area of concern.
Because of the provisions described above for preventing fire propagation and for isolating circuit faults in common enclosures, Peach Bottom does not have associated circuits involving common enclosures, as defined by Generic Letter 81-12.
6.1.4 Summary For the reasons discussed in the preceding sections, Peach Bottom does not have a concern with associated circuits in any of the three categories established by Generic Letter 81-12. Therefore, fire-induced damage to circuits that are not designated as necessary for safe shutdown will not affect the operability of any of the safe shutdown methods described in Section 5.2.2.
FPP 6.1-4 REV. 21, APRIL 2017
PBAPS FPP 6.2 ANALYSIS OF HIGH/LOW PRESSURE INTERFACES Generic Letter 81-12, issued by the NRC on February 20, 1981, discussed the type of information that the NRC considers necessary for the completion of its reviews of safe shutdown capability in the event of a fire. One of the enclosures to Generic Letter 81-12 addressed the subject of interfaces between high pressure and low pressure systems. The NRC's concern involves the valves that serve to isolate low pressure systems from the high pressure reactor coolant system. For situations in which the isolation valves at a given interface point consist of two electrically controlled valves in series, the potential may exist for a single fire to cause damage to cables associated with both valves, depending on the routing of the cables. If the damage causes spurious opening of both valves, the result may be a fire-induced LOCA through the high/low pressure system interface.
A review of the Peach Bottom design was performed to verify that a high/low pressure interface LOCA cannot be caused by a single fire.
Each system that includes connections to the high pressure reactor coolant system was reviewed to locate the specific high/low pressure interface points, identify the valves that provide isolation at the interface points, and assess the susceptibility of the valves to simultaneous opening due to fire-caused damage. Table A-5 identifies each such high/low pressure interface and lists the valves at the interface point. Comments in the "Remarks" column of the table identify the service of each high/low pressure interface, and indicates the susceptibility of and effect from each interface, assuming that a single fire could damage cables associated with both the upstream and downstream valves. It should be noted that Table A-5 is applicable to both Unit 2 and Unit 3, and that the unit numbers have been omitted from the valve designations.
FPP 6.2-1 REV. 16, APRIL 2007
PBAPS FPP 6.3 ANALYSIS OF THE YARD The Yard contains Safe Shutdown Cables and Equipment associated with the Emergency Diesel Generators, Emergency Service Water System, High Pressure Service Water System, Process Instrumentation, and the Offsite Power System. This equipment is located within the site boundary, outside of plant structures, and in manhole installations. A Fire Safe Shutdown analysis has been performed, demonstrating Safe Shutdown capability for a postulated fire in the Yard.
Manholes 25 and 26 are located on the eastern side of the road running between the circulating water pump structure and the administration building. They are each located approximately 12 feet west of the circulating water pump structure and approximately 40 feet from each other. Transformers along the outside of the west wall of the circulating water pump structure come to within 5 feet of the manholes. The fill connection for the diesel fuel oil storage tank of the diesel fire pump is located midway between manholes 25 and 26. The area immediately west of the manholes is the driveway between the administration building and the pump structure. The areas on the other three sides of the manholes are covered with stone. Each manhole is subdivided into four compartments that provide separation between redundant safety-related components. The manholes are protected from intrusion of combustible liquid by raised curbing. In addition, manhole covers are seated on gaskets and penetrations between compartments are sealed with silicone elastomer. Therefore, no fire is postulated that is capable of affecting more than a single compartment. The locations of these manholes are shown in Figure B-3.
The Manhole 25 contains cable associated with shutdown methods A, B, and C for Unit 2 and Unit 3:
Compartment 1 contains SSD cables associated with HPSW valves MO-2344, MO-2233A, MO-2233B, MO-3233B, pressure indication for HPSW pumps 2AP42 and 2CP42, and the main power cable for MCC00B62.
Compartment 2 contains SSD cables associated with ESW Pump 0AP57 and HPSW Pumps 2BP42 and 2DP42. Compartment 3 contains SSD cables associated with ESW Pump 0BP57 and HPSW Pumps 2AP42 and 2CP42.
Compartment 4 contains SSD cables associated with pressure indication for ESW Pumps 0AP57 and 0BP57, HPSW Pumps 2BP42 and 2DP42, control of MO-2344 and MO-3233A, and power to MCC00B61.
Cables required to support shutdown methods A, B, or C have cables associated with redundant equipment located outside the associated compartment. Therefore, shutdown methods A, B, and C will be available to safely shutdown Units 2 and 3.
FPP 6.3-1 REV. 21, APRIL 2017
PBAPS FPP Manhole 26 contains cables associated with Unit 3 SSD Methods A, B, and C:
Compartment 1 contains cables associated with HPSW Valve MO-3344 and pressure indication for HPSW Pumps 3AP42 and 3CP42.
Compartment 2 contains SSD cables associated with HPSW Pump 3AP42 and 3CP42. Compartment 3 contains SSD cables associated with HPSW Pumps 3BP42 and 3DP42. Compartment 4 contains cables associated with HPSW Valve MO-3344 and pressure indication for Pumps 3BP42 and 3DP42. Cables required to support shutdown methods A, B, or C have cables associated with redundant equipment located outside the associated compartment. Therefore, shutdown methods A, B, and C will be available to safely shutdown Units 2 and 3.
Manholes 16, 17, 18, and 19 are located in the access area between the northern side of the radwaste permanent storage building and the southern side of the Unit 2 turbine building. The manholes are on a line extending east to west approximately 28 feet from the northern side of the radwaste storage building and diesel generator building and 46 feet from the southern side of the Unit 2 turbine building.
Manholes 16, 17, and 18 have two round steel covers with gasketing, manhole 19 has one round steel cover. The center of manhole 16 is approximately 30 feet along the line from the east side of the offgas filter building. The center of manhole 17 is approximately 8 feet further east along the line but with only 6 inches physically separating the manholes. The center of manhole 18 is approximately 8 feet east of manhole 17 and physically separated by about 8 inches. The center of manhole 19 is approximately 16 feet east of manhole 18, with a physical separation of approximately 10 feet. The locations of these manholes are shown in Figure B-3.
Manhole 40 is in line with manholes 16, 17, 18, and 19 approximately 8 feet west of manhole 16. Covers for manholes 40, 16, 17, and 18 have been gasketed to prevent the intrusion of combustible liquids.
In addition, penetrations between compartments for manholes 16 and 17 have been sealed with silicone elastomer. Manholes 89 and 90 are between the west end of the hydrogen storage facility and the east side of the offgas filter building, approximately 6 feet from the Unit 2 turbine building. Manhole 89 is approximately 3 feet east of the offgas filter building, and manhole 90 is approximately 8 feet east of the offgas building. Both manholes 89 and 90 are west of the hydrogen storage facility. The locations of these manholes are shown in Figure B-3. Manhole 90 is protected from intrusion of combustible liquid by gaskets and sealed openings in the manhole cover. Manhole 92 is located east of the Torus Water Storage Tank.
FPP 6.3-2 REV. 21, APRIL 2017
PBAPS FPP Manholes 019, 089, and 091 do not contain safe shutdown cables.
Manhole 016 contains cable associated with shutdown methods A, B, and C for Units 2 and 3:
Manhole 016 contains cables associated with control and power for 0AG12, 0DG12, MCC00B53, MCC00B56, Diesel Source Breaker (2-152-1807) to Bus 20A18, Diesel Source Breaker (3-152-1807) to Bus 30A18, and MO-3486. Cables required to support safe shutdown method C have cables associated with redundant equipment located outside the manhole. Therefore, shutdown method C will be available to safely shut down Units 2 and 3.
Manhole 17 contains cables associated with shutdown methods A, B, and C for Units 2 and 3:
Manhole 017 contains power and control cables associated with 0AG12, MCC00B53, Diesel Source Breaker (2-152-1503) to bus 20A15, and Diesel Source Breaker (3-152-1503) to bus 30A15. Cables required to support safe shutdown method C have cables associated with redundant equipment located outside the manhole. Therefore, shutdown method C will be available to safely shut down Units 2 and 3.
Manhole 18 contains power and control cables associated with shutdown methods A, B, and C for Units 2 and 3:
Manhole 018 contains power and control cables associated with control of 0BG12, MCC00B54, Diesel Source Breaker (2-152-1606) to 20A16, and Diesel Source Breaker (3-152-1606) to 30A16. Cables required to support safe shutdown method C have cables associated with redundant equipment located outside the manhole. Therefore, shutdown method C will be available to safely shut down Units 2 and 3.
Manhole 040 contains power and control cables associated with shutdown methods A, B, and C for Units 2 and 3:
Manhole 040 contains cables associated with control of 0CG12, MCC00B55, valve MO-2803, valve MO-2486, Diesel Source Breaker (2-152-1704) to 20A17, and Diesel Source Breaker (3-152-1704) to 30A17. Cables required to support safe shutdown method C have cables associated with redundant equipment located outside the manhole. Therefore, shutdown method C will be available to safely shut down Units 2 and 3.
FPP 6.3-3 REV. 21, APRIL 2017
PBAPS FPP Manhole 090 contains control cables associated with shutdown methods A, B, and C for Units 2 and 3:
Manhole 090 contains cables associated with HPSW discharge valves MO-2486, MO-2803, MO-3486, and MO-3803. Cables required to support safe shutdown methods A, B, and C have cables associated with redundant equipment located outside the manhole or manual operator actions can be taken to recover any functions that could be lost. Failure of any of these cables would be handled as normal equipment failure. Therefore, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
Manhole 092 contains control cables associated with shutdown methods A, B, and C for Units 2 and 3:
Manhole 092 contains cables associated with HPSW Inlet Valves to ECT Reservoir, MO-0502A and MO-0502B. Cables required to support safe shutdown have cables associated with redundant equipment located outside the manhole. Therefore, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
FSSD cables and equipment are located in the general Yard area in manholes 005, 006, 008, 009, 011, 028, 041, 057, 060, 061, and 064, and in various locations outside of plant structures throughout Yard Fire Area. In addition, four common electro-manual pilot valve cabinets for CO2 suppression systems are located in the Yard area outside the Fifth Diesel Bay (Fire Area 54).
The general Yard area including manholes 005, 006, 008, 009, 011, 028, 041, 057, 060, 061, and 064, contains cables and equipment associated with shutdown methods A, B, and C for Units 2 and 3:
A fire in the general Yard area including manholes 005, 006, 008, 009, 011, 028, 041, 057, 060, 061, and 064, may impact the Offsite Power System. Cables and equipment required to support safe shutdown have redundant equipment located outside the general Yard area. Safe shut down is demonstrated with the failure of Offsite Power by the use of the Emergency Diesel Generators. Therefore, shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
The area outside Fire Area 54, (Fifth Diesel Bay) contains cables and equipment associated with shutdown methods A, B, and C for Units 2 and 3:
A fire in the area outside Fire Area 54 may impact the Offsite Power System. Additionally, this location contains four electro-FPP 6.3-4 REV. 21, APRIL 2017
PBAPS FPP mechanical pilot solenoid valve cabinets (EMPC-1, EMPC-2, EMPC-3, EMPC-4) for the CO2 suppression systems in Fire Areas 44, 45, 46, and 47 (Emergency Diesel Generator Bays).
The normally de-energized pilot supplies the gas to open the discharge valve for each diesel compartment. The pilot can be operated either electrically or mechanically. Operation of each CO2 system also causes the respective diesel generator to be directly tripped from a system relay. Simultaneous failure of all four pilots is not a credible event. There is normally no power in the pilot cabinets; the solenoid receives power from the hazard control boxes. Fire areas 43, 44, 45, and 46 each contain one hazard control box. To mechanically operate the pilots, a break-glass front must be broken and a lever rotated. Therefore, the location of the four pilot cabinets in a common area does not pose a threat to safe shutdown capability. SSD is demonstrated with the failure of Offsite Power by the use of the Emergency Diesel Generators.
Shutdown methods A, B, and C will be available to safely shut down Units 2 and 3.
The Refueling Water Storage Tank and Unit 2 Condensate Storage Tank are located in the Yard, surrounded by a common moat. The moat is of sufficient construction to allow a separate analysis of its enclosed area. The volume of the Refueling Water Storage tank and the volume of the Unit 2 Condensate Storage Tank are both required to support the reactor inventory control in Fire Safe Shutdown Methods A and B for Unit 2 and the RWST is also required to support the reactor inventory control in Fire Safe Shutdown Methods A and B for Unit 3. There is no redundant equipment that is credited to provide the same function for these methods.
Therefore, fire-induced damage to the Unit 2 CST would make methods 2A and 28 unavailable in this portion of the Yard and fire-induced damage to the RWST would make Methods 2A, 2B, 3A and 3B unavailable, in this portion of the Yard. However, since the tanks are filled with water, inherently rugged and protected from oil fire hazards by the common moat, fire-induced damage that would prevent them from fulfilling their function is not considered credible. Therefore, Shutdown Methods A, B and C will be available to safely shut down Units 2 and 3 for a fire within the boundaries of the moat.
The Unit 3 Condensate Storage Tank is located in the Yard, surrounded by a concrete moat. The moat is of sufficient construction to allow a separate analysis of its enclosed area.
The volume of the Unit 3 Condensate Storage Tank is required to support the reactor inventory control in Fire Safe Shutdown Methods A and B for Unit 3. There is no redundant equipment that FPP 6.3-5 REV. 21, APRIL 2017
PBAPS FPP is credited to provide the same function for these methods.
Therefore, fire-induced damage to the Unit 3 CST would make Methods 3A and 3B unavailable in this portion of the Yard.
However, since the tank is filled with water, inherently rugged and protected from oil fire hazards by the common moat, fire-induced damage that would prevent it from fulfilling its function is not considered credible. Therefore, Shutdown Methods A, B and C will be available to safely shut down Units 3 for a fire within the boundaries of the moat. The Unit 3 CST does not support any fire safe shutdown methods for Unit 2; therefore, Shutdown Methods A, B and C will be available to safely shut down Unit 2 for a fire within the boundaries of the moat.
FPP 6.3-6 REV. 21, APRIL 2017
PBAPS FPP 6.4 INDIVIDUAL PLANT EXAMINATION FOR EXTERNAL EVENTS - INTERNAL FIRES ANALYSIS In response to GL 88-20 Supplement 4, "Individual Plant Examination for External Events (IPEEE) for Severe Accident Vulnerabilities" Section 4 "Internal Fires Analysis" (see reference 22 in Appendix C) the licensee performed a fire risk analysis. As part of the one-time fire risk analysis, certain, specific enhancements were identified and implemented to ensure an acceptable fire risk profile was achieved. These modifications, administrative controls, and procedure enhancements were implemented to demonstrate that PBAPS risk from fire is acceptable. In the fire protection subject area the enhancements are summarized as follows:
(1) Fire barrier (walls) upgrades (2) Increased administrative controls on transient combustibles (controls over transient storage under exposed cabling in raceway and in transient free zones)
(3) Automation of a suppression system in the turbine building hatchway area, elevation 116 and 135 (4) Increased fire brigade awareness in higher relative risk areas of the plant (5) Procedure guidance for contingency actions to restore additional plant equipment beyond that required for strict Appendix R compliance in certain fire areas.
Through crediting existing plant features and the implementation of the enhancements summarized above, PBAPS has demonstrated an acceptable risk profile.
FPP 6.4-1 REV. 16, APRIL 2007
PBAPS FPP CHAPTER 7 FIRE PROTECTION REQUIREMENTS
7.1 INTRODUCTION
The fire protection requirements contained in Chapter 7 have been relocated from the Technical Specifications by Technical Specifications Change Request 90-05, which was submitted to the NRC on March 28, 1994. The relocation of the requirements was in accordance with NRC Generic Letters (GL) 86-10 "Implementation of Fire Protection Requirements," and GL 88-12, "Removal of Fire Protection Requirements from Technical Specifications."
These requirements are still mandated by a standard fire protection license condition contained in the Facility Operating Licenses.
Implementation of the requirements will be through the Technical Requirements Manual (TRM). As a result, for the purpose of clarity and consistency the Limiting Conditions for Operations have been termed Technical Requirements Manual Specifications (TRMS) and the Surveillance Requirements have been termed Test Requirements (TR).
7.1.1 Fire Safe Shutdown Equipment Restoration The majority of equipment analyzed for FSSD is Class 1E and/or governed by Technical Specification operability requirements. A small number of components have been installed or analyzed in response to 10CFR50 Appendix R safe shutdown requirements that are not Class 1E nor governed by Technical Specifications. To provide reasonable assurance of availability, when equipment analyzed for Appendix R safe shutdown is not functional or is indeterminate, troubleshooting, repair and return to service shall be performed on a high priority basis using existing procedures and planning methods.
Sections 7.2, 7.3 and 7.4 have been deleted from the FPP and relocated to the TRM.
FPP 7.1-1 REV. 16, APRIL 2007