ML23292A136
| ML23292A136 | |
| Person / Time | |
|---|---|
| Site: | Susquehanna  |
| Issue date: | 10/12/2023 |
| From: | Susquehanna |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML23291A105 | List:
|
| References | |
| PLA-8081 | |
| Download: ML23292A136 (133) | |
Text
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-1 9.4 AIR CONDITIONING, HEATING, COOLING AND VENTILATION SYSTEMS 9.4.1 CONTROL ROOM AND CONTROL STRUCTURE HVAC SYSTEMS The following systems are covered under this subsection.
a)
Control Room Floor Cooling System b)
Computer Room Floor Cooling System c)
Control Structure H&V System d)
Control Structure Emergency Outside Air Supply System (CSEOASS) or (CREOASS) e)
SGTS Equipment Room H&V Systems f)
Battery Rooms Exhaust System g)
Smoke Removal System h)
Access Control and Lab Area Supply System i)
Lab Fume Hood Makeup and Exhaust Systems All HVAC systems in the control structure are common systems which are shared by two power plant units (Unit 1 and Unit 2).
The Control Room and Control Structure HVAC systems have three basic modes of operation:
(1)
Normal - In this mode, normal outside air is processed throughout the control structure envelope. During this mode of operation, the control structure is maintained at a positive pressure over the outside air pressure.
(2)
Filtration (pressurization) - In this mode, outside air is processed through the CSEOASS or CREOASS system before circulating in the control structure envelope. However, the purpose of the mode is to remove (filter) radioactive material from outside air so that the control structure remains habitable. Again the control structure is maintained at a positive pressure over the outside air pressure.
(3)
Recirculation (isolation) - In this mode, the control structure HVAC is isolated from the outside air. All ventilation is recirculated throughout the control structure envelope.
9.4.1.1 Design Basis 9.4.1.1.1 Control Room Floor Cooling System (0V-117)
This system provides ventilation, cooling, and control of environmental conditions in the control room and associated areas on the 729 ft. elevation, and in the Technical Support Center on the 741 ft. elevation of the control structure. The system is designed to accomplish the following objectives during normal plant operation as well as under emergency conditions:
a)
Maintain the space temperature at 75qF r5qF, to control the air movement for personnel comfort and to ensure the operability of control room equipment and instruments under normal and design basis accident conditions.
b)
Maintain the space relative humidity at 50 percent r10 percent for personnel comfort and equipment performance under normal operation.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-2 c)
Divert the outside air supply through the control structure emergency outside air filter system when high radiation is detected in the outside air (filtration mode).
d)
Maintain a positive pressure above atmosphere to inhibit air leakage into the control structure envelope during normal and filtration modes.
e)
Recirculate and clean up room air (recirculation mode).
f)
Monitor radiation in the outside air supply.
g)
Operate during normal, shutdown, and design basis accident conditions without loss of function.
The control room floor cooling system (0V-117) has a safety related function and is designed to meet the Seismic Category I requirements. The kitchen exhaust fan (excluding the isolation dampers and the ductwork between these dampers and up to the FPD), toilet exhaust fan (excluding the isolation dampers and the ductwork between these dampers and up to the FPD),
reheat coils, and the humidification systems are not safety related. The isolation dampers and the ductwork between these dampers and up to the Fire Protection Damper (FPD) for the kitchen exhaust fan and the toilet exhaust fan is safety related and Q listed.
9.4.1.1.2 Computer Room Floor Cooling System (0V-115)
This system provides ventilation, cooling, and control of environmental conditions for the spaces located on control structure elevation 697-0 which includes the computer room (C-202), lower relay rooms (C-201 and C-203), computer maintenance rooms (C-206), and Uninterruptible Power Supply (UPS) rooms (C-208 and C-209). The cooling system is designed to:
a)
Maintain the space temperature at 75qF r10qF (except the UPS rooms which are 104qF maximum), to control air movement for personnel comfort and to ensure the operability of the computer equipment under normal conditions.
b)
Maintain the space relative humidity at 50 percent r10 percent as required for computer performance under normal operation.
9.4.1.1.3 Control Structure H&V System (0V-103)
This system (refer to Dwg. M-178, Sh. 1 and M-178, Sh. 2) serves all elevations within the control structure envelope, except elevation 729 ft. (control room floor), elevation 741 ft.
(Technical Support Center), and elevation 697 ft. (computer room floor).
The system is designed to accomplish the following objectives during normal plant operation as well as under DBA conditions:
a)
Maintain temperatures in the various spaces within specified limits.
b)
Meet the specified cooling and ventilation requirements to ensure the operability of the equipment and instruments without loss of function.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-3 c)
Maintain a positive pressure above atmosphere to inhibit air leakage into the control structure envelope.
d)
Divert the outside air supply through the control structure emergency outside air filter system during accident conditions.
9.4.1.1.4 Control Structure Emergency Outside Air Supply System (0V-101)
This system is designed to:
a)
Filter radioactivity from the outside air supply.
b)
Maintain the specified outside air supply to the control room and control structure envelope during accident conditions.
c)
Maintain a positive pressure above atmospheric to inhibit air leakage into the control structure during initiation in the filtration mode.
d)
Operate during and after design basis accident and reactor building isolation mode conditions without loss of function.
e)
Provide radiation monitoring of outside air supply.
The control structure emergency outside air supply system has safety related functions and is designed to Seismic Category I requirements.
9.4.1.1.5 SGTS Equipment Room H&V Systems The SGTS equipment room heating system (0V-144) and ventilation system (0V-118) are designed to:
a)
Maintain temperatures in the space within a range suitable for equipment performance.
b)
Maintain adequate air flow for ventilation.
The SGTS equipment room is located at Elevation 806 ft. All ductwork and equipment has safety related functions and is designed to Seismic Category I requirements.
9.4.1.1.6 Battery Room Exhaust System (0V-116)
The function of the battery room exhaust system is to maintain design temperature and pressure conditions and provide adequate airflow for ventilation.
The battery room exhaust system is designed to ensure that hydrogen concentrations remain within acceptable limits.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-4 9.4.1.1.7 Smoke Removal Exhaust System (0V-104)
The purpose of the smoke removal system is to exhaust smoke and gas after a fire has been extinguished from areas in the control structure between the elevations of 697 ft-0 in. and 771 ft-0 in. including the control room.
The system has no safety related function. However, the isolation dampers in the top of the duct shaft wall (HD07882) and those located in the control room (HD07889 and HD07890) are of Seismic Category I construction. All ductwork is Class A design.
9.4.1.1.8 Access Control and Lab Area Supply System (0V-105)
This system serves the access control and laboratory area at elevation 676 ft-0 in. of the control structure. This area is located outside the control structure envelope boundary. The equipment that serves this area is located in turbine building Unit 1 at elevation 762 ft-0 in. (H&V equipment room). The system has no safety related function and is designed to accomplish the following objectives during normal plant operation:
a)
Maintain temperature in the various areas within personnel comfort limits, (75qF r5qF).
b)
Maintain adequate airflow for comfort and ventilation.
c)
Maintain space pressure at approximately atmospheric.
9.4.1.1.9 Lab Fume Hood Makeup and Exhaust Systems (OV-106 and OV-114)
These systems have no safety related function. The design basis is to accomplish the following objectives during normal plant operation:
a)
Maintain air balance for fume hoods.
b)
Filter contaminated air from fume hoods and exhaust it through turbine building Unit 1 exhaust vent to the atmosphere.
The laboratory fume hoods are located in the control structure at elevation 676 ft-0 in., the filter units at elevation 686 ft-0 in., and the exhaust fan at elevation 806 ft-0 in.
The laboratory fume hood makeup air unit is located in the turbine building Unit 1 H&V equipment room at elevation 762 ft-0 in. All the above lab fume hood systems equipment is located outside the control structure boundary.
9.4.1.2 System Description 9.4.1.2.1 Control Room Floor Cooling System (0V-117) and Computer Room Floor Cooling System (0V-115)
The design of control room floor and computer room floor cooling systems (0V-117 and 0V-115 respectively) is similar. One serves the control room and the other serves the computer room.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-5 Both systems are shown on Dwgs. M-178, Sh. 1, M-178, Sh. 2, and VC-178, Sh. 2. Design parameters for the control room floor and computer room floor cooling systems are listed in Table 9.4-2.
Each system is served by two 100 percent capacity redundant air handling units (one operating and one on standby). Each unit contains a ventilation filter bank, chilled water cooling coils, a centrifugal fan, and a fan outlet damper. The two units are connected to a common Seismic Category I supply and return duct system that distributes supply air throughout the space and returns room air to the units. The conditioned air is cooled by water cooling coils. The chilled water supply system is described in Subsection 9.2.12. The control room and the computer room air conditioning equipment is located within a Seismic Category I structure. All equipment in each redundant system is powered from an independent Class 1E power source.
The chilled water for the cooling coils in each system is supplied by a Seismic Category I, independent chilled water supply system. The chilled water systems are interlocked with their respective supply air fans in the same division.
When the chiller train starts, the fans on the same division automatically start. Failure of any of these fans is annunciated in the control room and also trips the chilled water system and the fans in that division. The standby chilled water and air systems start automatically.
Redundant temperature switches are provided at the suction side of the fans of both systems.
When the suction trip air temperature for the fans is high, the operating fan and its associated chiller train is tripped and the standby chiller train and its associated fans all started simultaneously.
Fan selector switches in the control room panel allow manual selection of systems.
In the event of a fire in the control room, as evaluated in the FPRR 6.2.25, both trains of the computer Room Floor Cooling System could be disabled. The 'A' train can be manually operated from the CSHVAC Alternate Control Panel. This control is isolated from the control room control circuitry.
Each air system is provided with an air temperature controller that regulates the temperature of the return air. The controller will modulate a three-way mixing valve to control chilled water flows through the cooling coils.
For further description of the chilled water system see Subsection 9.2.12.
Each system supplies a minimum quantity of outside air and recirculates conditioned air to maintain space requirements; space humidity will be controlled during normal operations.
The outside air is taken from an outside air intake system that is described in Subsection 9.4.1.2.4. The control room floor and computer room floor cooling systems are supplied with outside air through a branch duct from the outside air intake system. A preset quantity of outside air is provided for these systems. This branch outside air duct is equipped with an electric duct heater. A duct mounted thermostat regulates a controller to modulate the leaving air temperature to a minimum of 50qF. The duct heater unit is Seismic Category I, but the control for the heater is not safety related. During emergency operation, this heater is not required to operate; the outside air will be heated by the emergency outside air system.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-6 A four step humidification system is provided for the control room and computer room. A humidistat mounted in the control room return air duct regulates a step controller to maintain humidity in the control room. The humidification is designed for normal operation only and is not a safety related system.
The humidification system is supported independently except for the steam distributor which is mounted in the duct. In the event of a DBA if the distributor fails, it will not affect the operation of the control room HVAC system.
The rooms C-401, C-402, C-406, C-410, C-412, C-414 and C-416 are equipped with duct mounted heating coils that operate during normal operation only and are not safety related.
These reheat coils are controlled by space thermostats set at 75qF. The heating coils are interlocked with the system supply fan.
The control structure envelope is discussed in FSAR 6.4.2.
The operation of the control room HVAC system during the recirculation phase is described in Subsection 9.4.1.2.4.
9.4.1.2.2 Computer Room Floor Cooling System See Subsection 9.4.1.2.1 for description of Computer Room Floor Cooling System.
9.4.1.2.3 Control Structure H&V Systems (0V-103)
The system is shown on Dwgs. M-178, Sh. 1, M-178, Sh. 2, and VC-178, Sh. 1.
Design parameters are listed in Table 9.4-2.
The system consists of two 100 percent capacity redundant air handling units (one operating and one standby). Each unit contains a ventilation filter bank, two electric heating coils, two chilled water cooling coils, a centrifugal fan, and a fan discharge damper. The units are connected to a common Seismic Category I supply and return duct system that distributes supply air throughout the areas served and returns room air to the units. The control structure H&V equipment is located within a Seismic Category I structure. All components in each redundant system are powered from an independent Class 1E power source.
In the event of a fire in the control room, as evaluated in the FPRR 6.2.25, both trains of the Control Structure HVAC system (0V103) could be disabled. The 'A' train can be manually operated from the CSHVAC Alternate Control Panel. This control is isolated from the control room control circuitry.
The control structure H&V systems supplies a fixed quantity of outside air through the outside air duct system and recirculates conditioned air to maintain space requirements. In each space the return air, exhaust air, and exfiltration will be balanced to:
a)
Provide supply air to maintain specified temperature conditions in the battery room floor, elevation 771 ft. and furnish ventilation air to the battery room exhaust system (0V-116).
For further discussion see Subsection 9.4.1.2.6.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-7 b)
Maintain space temperature conditions in the following areas:
Elevation 783 ft. -
H&V equipment room (C-700)
Elevation 753 ft. -
Upper relay rooms (C-501 and C-502), upper cable spreading rooms (C-500 and C-507), and electrician's office (C-504)
Elevation 714 ft. -
Lower cable spreading rooms (C-300 and C-301)
The control structure H&V system is designed to handle the heating and cooling load for the spaces mentioned above.
The chilled water systems that supply the control structure H&V unit cooling coils and their operation are described in Subsection 9.2.12.
In each fan system air temperature controllers, (one heating and one cooling), sense the temperature in the return air. The heating controller regulates the output of the electric heating coil through an SCR (silicon control rectifier). Chilled water flow through the cooling coil is modulated by a three way mixing valve controlled by the cooling controller.
9.4.1.2.4 Control Structure Emergency Outside Air Supply System (0V-101) (CSEOASS) or (CREOASS)
This system consists of two 100 percent redundant Seismic Category I filter trains complete with fans as described in Subsection 6.5.1.2. Each redundant system is powered from an independent Class 1E power source.
The system as shown on Dwgs. M-178, Sh. 1 and VC-178, Sh. 1. Design parameters are listed in Table 9.4-2.
Each filter train is connected to a common Seismic Category I duct system. The outside air intake to the emergency outside air supply system is a Seismic Category I duct that extends outside from the southeast corner of the Unit 2 Reactor Building to the south wall of the Control Structure as shown on Figure 6.4-2. The rest of the emergency outside air supply system is located within a Seismic Category I Structure.
When the emergency outside supply system is in operation the volume of air flowing in the main supply duct is continuously indicated and recorded in the control room. The upstream HEPA filter pressure differential is also continuously recorded in the control room. The loss of airflow will automatically trip and isolate the operating train and start the standby train. Both loss of airflow and high pressure differential across the above filter are alarmed in the control room.
Temperature detectors monitor the temperature of the charcoal adsorber. The pre-ignition temperature (set at 190qF) is alarmed in the control room and indicated locally on the unit's heat detection control panel which is located on elevation 806 ft. The ignition temperature (set at 450qF) is also alarmed in the control room and indicated locally. In addition, the ignition temperature signal will automatically trip the train and enable the fire protection water deluge valves.
The temperature differential across the filter train is also monitored. When this temperature
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-8 differential increases to 30qF it is alarmed in the control room. When it decreases to approximately 5qF this is also alarmed in the control room and also trips the supply fan. The low temperature differential is normally an indication of the failure of the electric heater.
The outside air for the control room floor cooling system (0V-117), computer room floor cooling system (0V-115), control structure H&V system (0V-103), and the SGTS equipment floor ventilation system (OV-118) are taken from a common outside air intake. The outside air intake is missile protected and connected to Seismic Category I design duct systems.
During normal operation, the outside air is drawn through the ducts and distributed to each system as described in above. When high radiation is detected at the outside air intake, this is annunciated in the control room, and the outside air is automatically diverted through the emergency outside air filter system (0V 101). The isolation dampers at the control room relief air duct are closed and all the non-safety related systems are tripped. The smoke removal system control dampers are normally closed.
After control room isolation is initiated, the emergency outside air system (0V 101) can be started up and operated manually to recirculate and clean up space air in the control room. The outside air intake dampers remain closed during this mode of operation.
When reactor building isolation is initiated, as described in Subsection 9.4.2.1, the emergency outside air system will automatically operate in the radiation filtration mode.
9.4.1.2.5 SGTS Equipment Room Heating and Ventilating Systems (0V-144 and 0V-118)
The equipment in both the heating and the ventilating systems is 100 percent redundant.
The systems are shown on Dwgs. M-178, Sh. 1, M-178, Sh. 2, and VC-178, Sh. 3. Design parameters are listed in Table 9.4-2. Each redundant system is powered from an independent Class 1E power source.
The redundant equipment is connected to common Seismic Category I ductwork systems.
There are two redundant heating system units each containing a ventilation filter, an electric heating coil, and a centrifugal fan with a discharge damper. The two redundant ventilation systems each contain a fan and discharge damper. The heating units (0V 144) recirculate room air and the space thermostat controls the heating coil to maintain a minimum room temperature of 40qF.
The 'A' train of the SGTS equipment room ventilating system (0V118) can be manually operated from the CSHVAC Alternate Control Panel. This control is isolated from the control room control circuitry.
The SGTS equipment room is ventilated by outside air that is introduced into the room through the outside air intake duct systems and exhausted by the ventilation system (0V-118) through the SGTS vent duct to atmosphere. The exhaust fan is controlled by a room thermostat so that the temperature is maintained below 100qF.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-9 9.4.1.2.6 The Battery Rooms Exhaust System (0V-116)
The system consists of redundant exhaust fans and redundant isolation dampers.
Each redundant system is powered from an independent Class 1E power source.
The system is shown on Dwgs. M-178, Sh. 1, M-178, Sh. 2, and VC-178, Sh. 3.
Design parameters are listed in Table 9.4-2.
The individual battery rooms are not equipped with independent fans. The system is designed to operate with one fan on standby and one operating. The branch ducts to each battery room are connected into a common duct system.
The 'A' train of the Battery Room Exhaust System (0V116) can be manually operated from the CSHVAC Alternate Control Panel. This control is isolated from the control room control circuitry.
The battery rooms' makeup air is introduced by the control structure H&V system (0V 103). The exhaust fan (0V 0116) system is designed to exhaust air from each battery room and discharge through the SGTS vent duct to the atmosphere.
9.4.1.2.7 Smoke Removal System (0V-104)
The control structure smoke removal system is composed of two 100 percent capacity redundant centrifugal fans, normally open fire dampers, normally closed control dampers, and associated ductwork and control.
The system is shown on Dwgs. M-178, Sh. 1, M-178, Sh. 2, and VC-178, Sh. 2.
Design parameters are listed in Table 9.4-2.
The hand control switches and associated status indicating lights of the fans and dampers are located in the control room on the fire protection control panel.
Fire dampers are provided for each floor area under supervisory control. The dampers are normally closed. When fire has been detected and suppressed, the smoke removal fan is manually switched on and the redundant fan is put into automatic standby. Smoke from affected floor areas is then purged by manually opening the appropriate fire dampers. If the operating fan fails it is alarmed in the control room and the standby unit automatically starts.
Smoke is exhausted to the turbine building exhaust vent.
The smoke removal system will not be operated during accident conditions.
9.4.1.2.8 Access Control and Lab Area Supply System (0V-105)
The system is shown on Dwgs. M-178, Sh. 1, and M-178, Sh. 2, VC-178, Sh. 2 and M-176, Sh. 1. Design parameters are listed in Table 9.4-2.
The access control and laboratory area supply unit contains a ventilation filter bank, an electric heating coil, chilled water cooling coils, and a centrifugal fan.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-10 The system is designed to maintain a temperature of 75qF r5qF for personnel comfort and provides makeup air during normal operation.
The control switch, located in a local panel, starts the supply fan. The system discharge air temperature controller directly controls the amount of chilled water flowing into the chilled water cooling coils. This temperature controller also controls the output of the electric heating coil through a step controller.
Control structure isolation signals will shut down the supply fan, which will in turn stop all other interlocked systems (see Subsection 9.4.1.5).
There are seven zones in this system; each zone contains an electric reheat coil. A zone thermostat will maintain each zone temperature. Each zone reheat coil is interlocked with the supply fans.
The control switch and associated status indicating lights and instruments are located in a local control panel installed in the turbine building Unit 1, H&V equipment room.
A unit heater in the personnel access corridor entry at elevation 676 ft-0 in. will temper infiltration from the entrance. The unit heater will maintain temperature under the control of a local thermostat.
9.4.1.2.9 Lab Fume Hood Makeup Air System (0V-106), Contaminated Filter Units Exhaust System (0V-114) and Hood Exhaust Filter Systems These systems are shown on Dwgs. M-178, Sh. 1, M-178, Sh. 2, VC-178, Sh. 2 and M-176, Sh. 1. Design parameters are listed in Table 9.4-2.
The laboratory fume hood makeup air system consists of an air handling unit equipped with a ventilation filter bank, an electric heating coil and a centrifugal fan, with the associated ductwork, dampers and controls. The makeup air supply unit supplies auxiliary air type fume hoods that are located in the control structure laboratories at elevation 676 ft-0 in.
The fan control is interlocked with the contaminated filter units exhaust fans. When the fan is in operation the system discharge air temperature controller controls the output of the electric heating coil, to provide tempered makeup air to the fume hood.
9.4.1.2.10 Control Room Toilet (0V-107), Control Room Kitchen (0V-108),
Access Control Area Toilet (0V-112), and Access Control Area General (0V-113) Exhaust Fan Systems These systems are shown on Dwgs. M-178, Sh. 1, M-178, Sh. 2, and VC-178, Sh. 2.
Design parameters are listed in Table 9.4-2.
The hand control switches of all the fans are located on the local control panel. The operation of these fans is strictly manual and they will operate only if the access control and lab area supply fan (0V 105) is operating. Since the control room may be directly exposed to the outside environment through the control room toilet and kitchen exhaust systems, fail-closed, redundant isolation dampers in series are installed at the intake of the toilet and kitchen exhaust fans.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-11 These isolation dampers are automatically closed by the high outside air radiation signal.
- 9. 4.1.2.11 Radiation Chemical Laboratory, Sample Room and Decontamination Area Hood Exhaust Filter Systems These systems are shown on Dwgs. M-178, Sh. 1, M-178, Sh. 2, VC-178, Sh. 4 and M-176, Sh. 1. Design parameters are listed in Table 9.4-2.
Each hood exhaust filter train consists of a pre-filter, HEPA filter, charcoal filter, fire detection system, filter train inlet and outlet dampers, and associated controls and instrumentation.
The inlet and outlet dampers are manually operated through a hand switch located at the hood or on a local control station as in the case of the decontamination area hood exhaust filter system.
Local differential pressure indication is provided across each filter and high differential pressure across the HEPA filter is alarmed at the local control panel.
The fire detection system has four temperature sensors. Two sensors to monitor pre-ignition (set at 190qF) and ignition (set at 450qF) temperatures are embedded in the charcoal filter. Two more identical sensors are located at the air outlet end of the filter train. The pre-ignition and ignition temperatures alarm directly in the control room. At ignition temperature, the inlet and outlet dampers are automatically closed to isolate the whole filter train. A manual deluge system is available for operations use should a fire occur.
Temperature indicators are provided at the local control panel to monitor the temperature of the inlet and outlet air of the filter train. In addition, high temperature differential between the inlet and outlet air of the filter train is alarmed at the local control panel.
9.4.1.3 Safety Evaluation All safety related control structure and control room systems are designed to maintain functional integrity during a design basis accident. Each system is provided with redundant equipment and controls to maintain uninterrupted room air circulation, cooling and heating for personnel comfort and instrument functioning. All equipment is located within the control structure, a protected Seismic Category I structure. During loss of offsite power, standby power is available from the standby diesel generators for the continued operation of all safety related equipment.
The single failure criteria for active safety related equipment are met by using redundant equipment and controls and automatically switching from one redundant system to the other.
Manual control of the 'A' train, isolated from the control room is also provided at the CSHVAC Alternate Control panel. Active equipment such as fans, controls, dampers, pumps, and chillers are redundant. Passive system components such as supply and return ductworks systems are common.
For failure mode and effect analysis see Tables 9.4-16 through 9.4-21 for safety related modes of operation.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-12 All ductwork and supports for the safety related systems meet the Seismic Category I requirements.
The control room HVAC system is designed to maintain environmental conditions within the space as specified for habitability and equipment operation under the normal and abnormal operating conditions. All equipment in the system is designed to Seismic Category I requirements, except the humidification equipment.
A radiation monitoring system is provided in the outside air intake to detect high radiation and initiate measures to ensure that personnel safety and equipment functions are not impaired.
In the event of a high radiation condition, the normal outside air supply to the system is diverted through the emergency outside air filter train before being delivered to the control room.
Isolation dampers on control room kitchen exhaust and control room toilet exhaust fan systems will be closed. These operations will be annunciated in the control room.
The emergency outside air filter train and the control room shielding envelope are designed to limit the occupational dose level as required by 10CFR50.67.
The introduction of a predetermined quantity of outside air maintains the control structure envelope at a positive pressure with respect to surrounding areas. This positive pressure is maintained during all the plant operating conditions except when the system is in the recirculation mode.
The control room HVAC system can be manually switched to the recirculation mode to cycle room air through the emergency outside air filter train (charcoal adsorber) system.
A smoke removal system is provided with a capability of purging any one of the floor areas under supervisory control.
9.4.1.4 Tests and Inspections The control room HVAC system and its components were thoroughly tested in a program consisting of the following:
a)
Factory and component qualification tests. (see Table 9.4-1) b)
Onsite preoperational testing. (see Chapter 14) c)
Onsite subsequent periodic testing. (see the Technical Specifications)
Written test procedures establish minimum acceptable values for all tests. Test results are recorded as a matter of performance record, thus enabling early detection of faulty performance.
All equipment was factory inspected and tested in accordance with the applicable equipment specifications, codes, and quality assurance requirements. Refer to Table 9.4-1 for details of inspection and testing.
The system was preoperationally tested in accordance with the requirements of Chapter 14.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-13 9.4.1.5 Instrumentation Requirements The control switches and the associated status indicating lights of all safety related equipment of the control room and control structure HVAC systems are located in the control room.
Control switches and indicating lights of all isolation dampers are located on local control panels. Status indicating lights of all isolation dampers are duplicated in the control room.
Although the control switches of isolation dampers are remote from the control room, the redundant isolation dampers are always in series and are designed to fail safe in the closed position. In addition, the redundant isolation signals of the isolation dampers are wired so that they override their corresponding control switch.
The control switches and status indicating lights of all non-safety related equipment, except the smoke removal system, are located on the equipment, on local panels, or on local control stations. Control switches and indicating lights of the smoke removal system fans and dampers are located on the fire protection panel in the control room.
Control switches and the associated indicating lights for fans 0V103A, 0V115A, 0V116A, and 0V118A are also located on the CSHVAC Alternate Control panel. Operation from this panel provides input to the Bypass Indication System (BIS).
All safety related equipment failures, such as fans failing to establish airflow when required, are alarmed in the control room on one of two separate annunciators (one annunciator for Division I equipment and one for Division II). In addition, the following are alarmed in the control room:
a)
High radiation in the outside air.
b)
High-high radiation in the outside air (upscale).
c)
Outside air radiation detection systems failure.
d)
High temperature (pre-ignition) in a charcoal adsorber of the Control Structure Emergency Outside Air Supply Systems (CSEOASS) or (CREOASS).
e)
High-high temperature (ignition) in a charcoal adsorber of the CSEOASS or (CREOASS).
f)
High pressure differential across an upstream HEPA filter of the CSEOASS or (CREOASS).
g)
High temperature differential across a filter train of the CSEOASS or (CREOASS).
h)
Normal outside air supply isolation damper failed closed in the absence of control structure isolation signals.
i)
Loss of control power to the electronic instruments.
The outside air radiation level is continuously recorded in the control room.
Failure of non-safety related equipment is alarmed on local control panels and is retransmitted
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-14 to the control room as a trouble alarm.
All safety related equipment with maintained contacts type control switches have automatic input to the bypass indication systems (see Section 7.5) when the switch is in the "OFF" position.
Instruments of the safety related systems are seismically qualified and redundant to meet the single failure criteria. In particular, the emergency outside air supply systems (atmosphere cleanup) are instrumented to comply with the requirements of Regulatory Guide 1.52. Airflow in these systems is indicated, recorded, and alarmed (loss of flow) in the control room. Upstream HEPA filter pressure differentials are recorded and alarmed (high pressure differential) in the control room.
9.4.2 REACTOR BUILDING VENTILATION SYSTEM The following systems are covered under this subsection:
a)
Reactor building HVAC systems for normal operation.
b)
Other safety related air cooling systems: 1) Emergency Core Cooling Systems (ECCS) and RCIC pump rooms unit coolers and 2) emergency SWGR room and load center room cooling units (for normal and emergency operation).
The ESF reactor building recirculation system is covered in Subsection 6.5.3, and the standby gas treatment system (SGTS) is described in Subsection 6.5.1.
9.4.2.1 Reactor Building HVAC Systems for Normal Operation The secondary containment is divided into three isolated ventilation zones. Zones I and II surround respective Units 1 and 2 containments below the floor at elevation 779 ft-1 in. and also include stairwells and elevator machine rooms and shafts above elevation 779 ft-1 in. Zone III includes Units 1 and 2 secondary containments above the floor at elevation 779 ft-1 in. including the refueling floor. (See Dwgs. M-176, Sh. 1 and M-2176, Sh. 1, and M-175, Sh. 1, M-175, Sh. 2. and M-2175, Sh. 1.) Zone III also includes the railroad access shaft and railroad bay (Unit 1 only). The Railroad Access Shaft can be aligned to Secondary Containment Ventilation Zones 1, 3 or a No-Zone, depending on the position of dampers, doors, walls, and hatches.
The normal ventilation alignment for the Railroad Access Shaft is a No-Zone.
The H&V equipment rooms in Units 1 and 2 are not part of Secondary Containment Zones I, II, or III. See Dwg. M-175, Sh. 1 for the air flow diagram for the Unit 1 Electrical Equipment Room.
This section discusses Unit 1 secondary containment HVAC systems (Zones I and III of Unit 1).
The Unit 2 secondary containment HVAC systems (Zones II and III of Unit 2) are identical to those described for Unit 1 except minor air quantity and distribution elevation 779 ft-1 in.
including the refueling floor. (See Dwgs. M-176, Sh. 1 and M-2176, Sh. 1, and M-175, Sh. 1, M-175, Sh. 2. and M-2175, Sh. 1.)
Each of the ventilation zones is provided with independent HVAC systems designed to operate during plant normal operation and during shutdown. Zone III systems will function during
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-15 normal fuel handling and storage operation. The recirculation system and SGTS will be used after a fuel handling accident.
9.4.2.1.1 Design Basis The reactor building HVAC system is designed to accomplish the following objectives during stable and transient operating conditions, from start-up to full load to shutdown:
a)
Provide filtered outside air.
b)
Maintain air flow from areas of lesser to areas of greater potential contamination.
c)
The building will not exceed the maximum temperature values shown for the various rooms under Normal operating condition Environment on Dwgs. C-1815, Sh. 4, C-1815, Sh. 5, C-1815, Sh. 6, C-1815, Sh. 7, C-1815, Sh. 8, C-1815, Sh. 9, C-1815, Sh. 10, C-1815, Sh. 11, C-1815, Sh. 12.
d)
The minimum temperature of the reactor building rooms will be the values shown under Normal operating condition Environment on Dwgs. C-1815, Sh. 4, C-1815, Sh. 5, C-1815, Sh. 6, C-1815, Sh. 7, C-1815, Sh. 8, C-1815, Sh. 9, C-1815, Sh. 10, C-1815, Sh. 11, C-1815, Sh. 12.
e)
Maintain the secondary containment at a minimum negative pressure of 0.25 in. wg.
f)
Supply ventilation or purge air to the primary containment.
g)
Provide ventilation, cooling, and heating to the ECCS pump rooms during normal plant operation. For safety related cooling see Subsection 9.4.2.2.
h)
Filter air exhausted from areas of greater potential contamination (equipment rooms-all zones).
i)
Monitor radiation in the unfiltered air from the Zone III exhaust system (V 213), and isolate the Zone III portion of the secondary containment on a high radiation signal.
j)
Provide for radiation sampling in the reactor building exhaust vent.
k)
Provide for a transit time of exhaust air from the radiation monitors to the isolation dampers of Zone III unfiltered exhaust system, greater than the damper closing time plus the radiation monitor response time.
l)
Isolate appropriate ventilation zone or zones and start the recirculation system upon receipt of the secondary containment isolation signal.
m)
Isolate supply and exhaust ducts of rooms containing high energy pipelines after a pipe break. (Note: The closure function is not credited in the FSAR Appendix 3.6A high energy line break analysis.)
The portion of the reactor building ventilation system that is associated with the recirculation system is safety related and an engineered safety feature. The remaining portion of the
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-16 ductwork within the secondary containment boundary is not safety related; however, it is seismically designed and analyzed to ensure that it will not damage the safety related equipment and systems. Safety classifications are shown on the airflow diagrams, Dwgs. M-176, Sh. 1, M-2176, Sh. 1, M-175, Sh. 1, M-175, Sh. 2, and M-2175, Sh. 1.
Monitoring of radiation levels in the spent fuel pool is discussed in Subsection 12.3.4.
9.4.2.1.2 System Description The air flow diagrams for the reactor building are shown on Dwgs. M-176, Sh. 1, M-2176, Sh. 1, M-175, Sh. 1, M-175, Sh. 2, and M-2175, Sh. 1. System design parameters are listed in Table 9.4-3. Cooling water is supplied to the air cooling coils in the HVAC systems by the reactor building chilled water system described in Subsection 9.2.12. The controls and instrumentation associated with each system are an integral part of that system. The instruments and controls are shown on Dwgs. VC-176, Sh. 1, VC-2176, Sh. 1, VC-175, Sh. 1, VC-175, Sh. 2, and VC-175, Sh. 3.
All the equipment of the Unit 1 air handling systems is located in two H&V equipment rooms (El. 779 ft-1 in. and 799 ft-1 in. east of the spent fuel pool). The two rooms are outside the secondary containment boundary. Unit 1 and Unit 2 air handling systems are identical, with Zone I systems handling Unit 1 and Zone II systems handling Unit 2. Access to any zone (except railroad access shaft) from outdoors, to H&V equipment rooms, or access between the zones (except railroad access shaft) is through air locks with airtight doors on both sides.
Zone I Supply Unit System (V-202) and Zone III Supply Unit System (V-212)
Each system supplies the respective zone with conditioned 100 percent outdoor air.
Each supply system consists of two 100% capacity redundant fans (one normally operating and one in standby), outside air intake louvers, six radiant heaters, a filter bank, an electric heating coil bank, and a chilled water cooling bank. The system layout includes two disc type isolation dampers in series, distribution ductwork with associated dampers, and supply air outlets.
Zone I Equipment Compartment Exhaust System(V-206) and Zone III Filtered Exhaust System (V-217)
Each system exhausts air from the respective zone equipment compartments and from rooms with the higher potential for radioactive contamination.
Each exhaust system consists of two 100% capacity redundant fans and two 55% capacity filter trains connected to a common exhaust and discharge duct. Each filter train contains prefilters, upstream HEPA filters, charcoal absorber (6 in. deep vertical bed), and downstream HEPA filters. The system layout also includes two disc type isolation dampers in series.
Zone I Exhaust System (V-205) and Zone III Exhaust System (V-213)
Each system exhausts air from the respective zone areas of lesser radioactive contamination potential. Each system includes, in the direction of air flow: distribution ductwork with exhaust registers and dampers; two disc type, isolation dampers in-series; two 100 percent capacity fans; discharge ductwork connecting to the reactor building exhaust vent, and associated
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-17 controls.
Recirculation System (V-201) (See Subsection 6.5.3.2.)
During normal plant operation the reactor building ventilation systems maintain the design temperature and pressure in the respective zones of the secondary containments of Units 1 and
- 2. The supply air systems (V-202 and V-212) supply the respective zone with constant air volume. Fan discharge dampers of the exhaust systems V-205 and V-213 are modulated by appropriate pressure differential controllers to maintain a negative pressure of approximately 0.25 in. wg in the secondary containment. The air flow of exhaust systems V-206 and V-217 are controlled by their pressure differential controllers to maintain the air flow from areas of lesser to areas of greater potential contamination.
The Zone I and Zone II supply systems are provided with two air temperature controllers that control the temperature of the air leaving the supply fans. A step type controller is used to regulate the electric heating coils, and the cooling controller regulates a three-way mixing valve in the chilled water system supply to the cooling coils. The Zone III temperature is controlled by monitoring of the air leaving the exhaust fans. Note that a room thermostat controls the two-way modulating chilled water control valve for the CRD repair room cooling coil.
All panel mounted instruments and controls, including fan manual switches, are installed on local control panels. A group alarm from each panel is annunciated in the control room. In addition a "no ventilation" alarm for each zone is annunciated in the control room.
The chilled water cooling coils are drained and isolated during the winter months to prevent the coils from freezing. During the fall and spring seasons when the cooling coils are still functional, the coils are protected from freezing by low temperature switches mounted on the face of each coil. (See Subsection 9.2.12.)
Radiant heaters are provided in the intake plenum to automatically melt drifted-in snow to prevent the filter from blockage. Manual operation of the heaters is also possible by means of a hand switch on the local panel.
Two back draft isolation dampers (BDID) in-series, are provided on supply and exhaust ducts of selected rooms (see Dwg. M-176, Sh. 1) housing ECCS pumps or containing high energy piping. Each BDID is provided with a pressure differential switch that trips the release mechanism to close the damper on sensing high pressure inside the room. (Note: The closure function is not credited in the FSAR Appendix 3.6A high energy line break analysis.)
The trip circuits are connected to uninterruptible DC power supply.
Only one fan of each system is running during plant normal operation. On loss of air flow from the running fan, its associated discharge damper closes and the standby fan starts automatically. Failure of both fans on any one system to establish air flow will result in an automatic shutdown of the remaining ventilation systems in that zone. The loss of the zone ventilation is alarmed in the control room.
Redundant radiation monitors are provided on three branch ducts of V-213 (Zone III exhaust system). A high radiation signal from any monitor will automatically isolate Zone III as described in Subsection 9.4.2.1.3. Exhaust air transit time between the monitors and the V-213 system isolation dampers is greater than the combined time of damper closure and the monitor
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-18 response.
The systems' intake louvers and exhaust vents are not safety related and are outside the secondary containment; therefore, no provisions for missile protection are made for these components.
During purge mode, the primary containment is purged at a rate of 10,500 cfm. This amount of air is diverted to the primary containment from the Zone I supply system. From there the air is filtered through the SGTS and exhausted to the environment.
The reactor building exhaust vent is provided with a radiation sampler. High radiation level in the exhaust air is alarmed in the control room.
9.4.2.1.3 Safety Evaluation The Reactor Building Ventilation system is housed within the Seismic Category I reactor building. Wind and tornado protection is discussed in Section 3.3. Flood design is discussed in Section 3.4. Missile protection is discussed in Section 3.5. Protection against dynamic effects associated with the postulated rupture of piping is discussed in Section 3.6. Environmental design considerations are discussed in Section 3.11.
The secondary containment isolation is the only active safety related function of the normal operation of the reactor building HVAC system. The system passive safety related function is the use of related ductwork in the reactor building recirculation mode which is discussed in Subsection 6.5.3.
The isolation dampers which are used for secondary containment isolation are redundant (two in series), fail closed, disc type dampers, operated by spring loaded air cylinders. If an active failure disables one of the two dampers, the other one is able to perform the isolation function.
For the duct to Airlock I/II-707, two isolation dampers were not installed for secondary containment isolation. Therefore, damper HD1(2)7534C has been closed and deactivated and a blank has been installed in the airlock to replace the exhaust register.
All hand control switches and indicating lights for safety related isolation dampers are located in the control room. The reactor building ventilation system is started manually from the local control panel. The primary containment purge supply air damper is manually operated from the control room.
The appropriate ventilation zones of the secondary containment are automatically isolated and the recirculation system is actuated upon receipt of one of the following signals:
SIGNAL ISOLATES ZONE(S)
High radiation in the refueling floor exhaust ducts III High radiation in the railroad access shaft exhaust duct (Unit 1 only)
III High pressure in the drywell I* & III Low reactor water level I* & III A manual signal from the control room III or I* & III Or Zone II if the signal is from the Unit 2 drywell or reactor.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-19 Any of the above isolation signals will result in the following automatic sequence for the affected zone or zones:
a)
Trip all running ventilation fans and prevent standby units from operating b)
Close normally open isolation dampers (two in-series separating safety-related from non-safety-related portions of each system) c)
Open normally closed recirculation dampers (two, in parallel), on each duct connecting the recirculation system fans into the ventilation system ductwork to be used in the recirculation mode of operation d)
Start the recirculation system (Subsection 6.5.3) e)
Start the SGTS (Subsection 6.5.1)
During the plant normal or emergency operation the following events will result in the secondary containment not being maintained at a pressure below atmospheric:
a)
Loss of offsite power (emergency operation). This will also result in false LOCA signal on Unit 1 and II.
b)
A normally opened isolation damper on any of the supply or exhaust systems failing in a closed position results in a system trip.
c)
Loss of the reactor building ventilation due to failure, malfunction of system components.
Loss of reactor building ventilation will be alarmed in the control room, and the isolation of the affected ventilation zone(s) of the secondary containment may be initiated manually. As a result, the preferred air flow from areas of lesser to areas of higher potential contamination may not be maintained; however, the affected secondary containment will be maintained at a negative pressure of approximately 0.25 in. wg.
Each ventilation system is provided with two 100 percent capacity fans. When failure of a running fan or its discharge damper is detected by a flow switch, the respective standby fan will automatically start. On failure of a fan or its discharge damper, the preferred air flow pattern will not be affected.
The failure of a BDID in a closed position will result in a loss of ventilation for the equipment room affected and trouble alarm on a local HVAC panel. Each trouble alarm will be sounded in the control room as the panel group alarm. Indicating lights on the local panel will identify the failed damper, which can be manually reset to the open position.
Refer to Subsection 9.4.2.1.5 for a list of abnormal conditions which are alarmed on the local HVAC control panels.
The operational degradation of ventilation system components can be detected by direct equipment status indication (indicating lights for damper position, fan running status) or can be concluded based on abnormal temperature, differential pressure, alarms, and indication.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-20 Corrective action can then be taken.
9.4.2.1.4 Tests and Inspections All tests and inspections described in Table 9.4-1 apply to the reactor building HVAC systems, which are used during normal operation.
The system was preoperationally tested in accordance with the requirements of Chapter 14.
9.4.2.1.5 Instrumentation Requirements Hand switches and status indicating lights are provided in the control room for each isolation damper (except for the air locks isolation dampers). Hand switches and status indicating lights for the balance of the air handling systems, and for the air locks isolation dampers (except HD1(2)7534C, which has no hand switch or indicating lights) are located on local HVAC control panels.
The following alarms are annunciated in the control room:
a)
Fan trouble, each safety-related fan b)
High radiation in Zone III exhaust ducts, and the downscale signal from radiation monitors c)
Reactor Building vent effluent radiation monitoring system alarms listed in Section 11.5.2.1.1 d)
High flow in ducts interconnecting Zone I and zone II ventilation systems with the recirculation system fans. This is to detect recirculation dampers which fail open in the ventilation zone which is not being recirculated e)
Loss of ventilation in any of the three ventilation zones (Zone I, II or III) f)
Group alarm on closure of any of the backdraft isolation dampers g)
Group alarm from each HVAC local control panel h)
Manually induced inoperability of the safety-related systems is alarmed and continuously indicated in the control room on bypass indication system as required by Reg. Guide 1.47 and identified in FSAR Section 7.5.1b.7. Note that the ECCS and RCIC Pump Room Unit Coolers are not included in BIS.
i)
Pre-ignition and ignition temperatures of charcoal absorbers.
In addition, the following conditions are alarmed on the local HVAC control panels and transmitted to the control room as a group alarm:
a)
Fan failure, each non safety-related fan
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-21 b)
High pressure drop across filters c)
High or low pressure in the zone or one of the potentially contaminated areas d)
Low air temperature entering cooling coils handling outside air (freeze protection) e)
High pressure differential across the upstream HEPA filter bank of each filter train f)
Pre-ignition and ignition charcoal absorber temperatures g)
High temperature differential across charcoal absorber bed All instruments and controls performing safety related functions are qualified to the Seismic Category I requirements. Requirements concerning redundancy and separation of instrumentation and controls for this equipment is detailed in Section 7.0.
9.4.2.2 Other Safety-Related Air Cooling Systems The following equipment and systems are covered under this heading:
- 1)
Unit 1 and Unit 2 RHR, HPCI, RCIC, and core spray pump rooms unit coolers.
- 2)
Unit 1 and Unit 2 Emergency SWGR cooling units with associated ductwork.
- 3)
Unit 2 Emergency SWGR refrigeration system.
9.4.2.2.1 Design Basis The above cooling systems are designed to:
a)
After a DBA, maintain temperature in the ECCS and RCIC pump rooms below the maximum values shown on Dwgs. C-1815, Sh. 5 and C-1815, Sh. 6.
b)
Maintain emergency SWGR and motor control center room temperature below the maximum values shown on Dwgs. C-1815, Sh. 8 and C-1815, Sh. 9.
The coolers, refrigeration units, associated ductwork, refrigeration piping and supporting structures are safety-related and are Seismic Category I.
9.4.2.2.2 System Description General The safety related air cooling systems are shown on the reactor building air flow diagrams for Zone I and Zone II (Dwgs. M-176, Sh. 1 and M-2176, Sh. 1, respectively). These rooms primarily use the RBHVAC system for cooling during normal operation. However, in an emergency, the individual room coolers are used to dissipate any generated heat load. The
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-22 system design parameters are displayed in Table 9.4-4a. The emergency switchgear and load center room cooling units contain two different cooling coils. One of the coils is supplied with reactor building chilled water during normal operation, and the other is supplied with control structure chilled water on Unit 1 and a direct expansion type refrigerant cooling coil on Unit 2 during DBA conditions. The RHR, HPCI, RCIC, and Core Spray room coolers are supplied by the emergency service water system. The instrumentation and controls for each system are shown on Dwgs. VC-176, Sh. 1 and VC-2176, Sh. 1.
Safety-Related Pump Room Unit Coolers Each safety-related pump room unit cooler recirculates and cools the respective room air, and is capable of carrying the following cooling loads:
a)
RHR and core spray pump rooms are provided with a unit cooler for each pump installed, thus two coolers in each room. Each cooler is sized for 100% cooling of the heat load generated when the respective pump is running.
b)
RCIC and HPCI pump room coolers - the total room cooling load.
Each unit cooler consists of a cabinet with a cleanable emergency service water cooling coil, a direct drive vane-axial fan mounted outside of the cabinet, and except for RHR pump room coolers, a sheet metal transition section with a supply air register. The unit coolers are mounted adjacent to the pumps they serve, and they start automatically when the pump starts. Each cooler is also provided with a hand switch in the control room for manual operation. During plant normal operation, the reactor building ventilation system is used to maintain the design conditions in the ECCS and RCIC pump rooms (see Subsection 9.4.2.1).
Each pair of RCIC and HPCI room coolers is provided with additional hand selector switches in the control room for selection of the lead and standby units. In addition each cooler is provided with a temperature switch to transfer to the standby unit on detection of high air temperature at the discharge of the running unit and to annunciate this condition in the control room.
An additional temperature switch is provided in both the RCIC pump room and the RHR pump room to detect high room temperature resulting from fan control failure due to a fire in the control room. Detection of high temperature results in the automatic start of the "B" fan in the RCIC pump room and the "B" fan in the RHR pump room ("A" fan for the Unit 2 RHR pump room) while simultaneously isolating the control room controls from the fan starter circuits. This occurrence also results in "fan trouble" annunciation in the control room. A low temperature setpoint is also provided to stop the fans after adequate cooling has occurred.
Emergency SWGR and Load Center Room Cooling Units Two 100 percent capacity cooling units are provided for the emergency SWGR and load center rooms. Each unit consists of a cabinet with the following components, in the direction of the air flow: prefilters, emergency cooling coil (Control Structure Chilled Water (Unit 1), Direct Expansion (Unit 2)), a Reactor Building chilled water cooling coil, and a belt driven centrifugal fan. The air discharge of each unit is connected to a common supply air duct.
Air enters the unit inlet directly from the surrounding area in one division and from a different elevation in the other division to avoid common mode failure concerns. Duct penetrations for
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-23 the supply air, and the transfer grilles for the return air to and from each room, are redundant and parallel, and are furnished with fire protection dampers. During normal operation Reactor Building chilled water flow through the coil is modulated by a three-way mixing valve controlled by the discharge air temperature controller. In addition, to eliminate a single failure mode the Control Structure Chilled Water Supply and return valves to the coil are in the open position and the bypass valve is closed allowing chilled water to be available for normal and emergency operation. The thermal overloads for these valves have been removed.
After a DBA Reactor Building chilled water is not available, and the Control Structure chilled water cooling coils are used for the Unit 1 cooling units. Control Structure chilled water flow through the coils is unrestricted with no supply air temperature or water flow control. After a DBA the Reactor Building chilled water is not available for the Unit 2 cooling units, and the direct expansion cooling coils are used. The refrigerant flow passing through the direct expansion coils depends upon the temperature of the air and is modulated by the thermoexpansion valves.
Heat from both the Control Structure chilled water and direct expansion cooling coils is ultimately transferred to the ESW system.
Only one cooling unit is running during plant normal or emergency operation. When loss of air flow or high discharge air temperature from the running unit is detected that unit's discharge damper closes and the fan is tripped. The standby unit starts automatically. Both the high temperature and the running unit trip are alarmed in the control room.
Each unit is provided with a three position (auto, start, stop) hand switch in the control room, a flow switch and a temperature switch both mounted on a common supply air duct.
Unit 1 In order to provide for an automatic response to high room temperatures in the Emergency Switchgear and Load Center Rooms, a separate room temperature switch has been installed.
Once a high room temperature is sensed, providing that the respective Division control structure chilled water circulation pump is running, the switch will isolate control circuits from the Control Room and initiate an autostart of the A (Div. I) or B (Div. II) Emergency switchgear and Load Center room coolers using the aforementioned control structure chilled water coil. Once the temperature is reduced below the existing cutout setpoint, the switch will then turn the coolers off. This design provides for room cooling in the event of a Control Room fire in which the existing control room circuits are disabled. Any actuation of this feature is annunciated in the Control Room.
Unit 2 Similar to Unit 1 but taking into account the differences in the supply to the emergency cooling coil, a separate temperature switch was installed to isolate the control circuits of the Emergency Switchgear Room Cooling equipment from the Control Room. This temperature switch performs the same function of starting and stopping the room cooler based on existing room temperature. Interlocks are provided in the fan control circuit to prevent it from starting until the compressor is running. This occurrence also results in the Fan Trouble and Emergency Switchgear Room Cooling System Trouble alarm in the Control Room.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-24 9.4.2.2.3 Safety Evaluation For failure mode and effect analysis see Table 9.4-5, for safety-related modes of operation.
All units, ductwork and supports, and other systems components, except for discharge air temperature pneumatic control loop, meet Seismic Category I requirements and single failure criteria.
9.4.2.2.4 Tests and Inspections With the exception of items (4) and (7) through (9) all tests and inspections described in Table 9.4-1 apply to the coolers and associated ductwork system.
The system was preoperationally tested in accordance with the requirements of Chapter 14.
9.4.2.2.5 Instrumentation Requirements The following systems and/or equipment are provided with hand switches and status indicating lights in the control room:
Each ECCS pump room unit cooler Each switchgear cooling unit The Unit 2 switchgear refrigeration units The following alarms are annunciated in the control room:
Fan trouble, each safety related fan High supply air temperature for the emergency switchgear rooms Group alarm from each HVAC local control panel Trouble of Unit 2 switchgear refrigeration systems (Local Alarm as well)
All instruments and controls performing safety related functions are qualified to Seismic Category I requirements. Requirements concerning redundancy and separation of instrumentation and controls for this equipment is detailed in Section 7.0.
9.4.3 RADWASTE BUILDING VENTILATION SYSTEM 9.4.3.1 Design Bases The Radwaste Building HVAC systems have no safety-related functions.
The Radwaste Building Heating, Ventilating, and Air Conditioning (HVAC) systems are designed to operate during normal operations and accomplish the following objectives:
a)
Provide a supply of filtered and tempered outside air to all areas of the building b)
Maintain airflow from areas of lesser to areas of greater potential contamination
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-25 c)
Maintain the building spaces below the following maximum temperatures:
General Areas 100°F Equipment Rooms 104°F Tank Rooms 120°F d)
Maintain the building minimum temperature of 40°F e)
Maintain the building at a slightly negative pressure to minimize exfiltration to the outside atmosphere f)
Filter through charcoal and particulate filters all air exhausted from:
x Liquid Radwaste Processing
- 1.
Liquid radwaste sample tanks
- 2.
Liquid radwaste filter
- 3.
Spent resin tank
- 4.
Liquid radwaste collection tanks
- 5.
Radwaste building sump and pumps
- 6.
Radwaste mist eliminator
- 7.
Radwaste bldg. chemical radwaste sump & pumps x
Solid Radwaste Collection
- 1.
Waste mixing tank
- 2.
Waste sludge phase separator
- 3.
Reactor water clean-up phase separator x
Liquid Radwaste Chemical Processing
- 1.
Chemical waste tank
- 2.
Radwaste evaporator and condenser
- 3.
Evaporator distillate sample tank
- 4.
Radwaste evaporator concentrate storage tank x
Liquid Radwaste Laundry Processing
- 1.
Laundry drain tanks
- 2.
Laundry drain sample tanks g)
Discharge all air exhausted from the Radwaste Building areas through pre-filters and particulate filters to the turbine building exhaust vent.
h)
Discharge gas from the Primary Coolant Degasifier to the turbine building exhaust vent.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-26 9.4.3.2 System Description The airflow diagrams for the radwaste building are shown on Dwgs. M-179, Sh. 1 and M-179, Sh. 2. Systems design parameters are listed in Table 9.4-6. Cooling water is supplied to the air cooling coils of the HVAC supply unit by the radwaste building chilled water system described in Subsection 9.2.12. The instrumentation and controls, shown on Dwg. VC-179, Sh. 1, are considered an integral part of their systems.
The Radwaste Building HVAC supply and exhaust units are located in the equipment rooms on elevation 691 ft. 6 in. The tank vent filter system fan and filters are located in the filter room on elevation 646 ft. 0 in.
The supply system contains two 100 percent capacity fans, a housing containing one bank of particulate filters, a bank of electric heating coils, and a chilled water cooling coil. Filtered and tempered air is distributed throughout the building in quantities designed to maintain required temperatures and airflow toward areas of higher potential contamination. The building exhaust system contains two 100 percent capacity fans and two 50 percent capacity filter housings, each with a bank of high efficiency particulate filters (HEPA) and a bank of prefilters upstream.
This exhaust system is balanced to maintain the flow of air within the building as described.
In addition to the Building Supply System, a Recirculation System supplies cooling air to the off-gas area. The Recirculation System includes a unit cooler which is interlocked with the Building Exhaust System.
The tank vent filter system provides a means of filtering and venting air from tanks and equipment housed in the radwaste building. A single fan and filter train are employed for this purpose. An electric duct heater upstream of the filter is used to lower the humidity of the air, as necessary, to ensure proper filter operation. The filters, in the direction of air flow are prefilter, HEPA, and charcoal. Since the flow of air from tanks and equipment varies, space air is admitted as required to maintain system volume.
The exhaust systems use the same duct to transport the filtered air to the turbine building exhaust vent. Also, the controlled shop exhaust in the Services and Administration Building is routed through the radwaste building to the turbine building exhaust vent where it is discharged.
The building exhaust system and the supply system are interlocked so that complete failure of either system will shut down the entire building ventilation system. This condition is a "total loss of radwaste building ventilation" and is alarmed directly in the control room.
Radiant heaters are provided in the outside air intake duct plenum of the supply system to melt drift-in snow to protect the filter. Manual operation of the heaters is provided by a hand switch on the local panel.
The control switch of each of the fans in the building exhaust system is on a local control panel.
The two exhaust fans are interlocked so that failure of the operating fan will automatically start the standby unit, isolate the failed unit, and alarm in the local control panel. This system is manually started.
The variable inlet vanes of each exhaust fan enable the system to vary exhaust airflow to maintain the building at a slightly negative pressure. Each of the two filter trains is manually set up for operation by opening the train's inlet and outlet dampers through the control switch on the
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-27 local control panel.
The Radwaste Building Supply (and Exhaust) System air handling unit consists of two fans.
During normal operation one fan runs and the other is on automatic standby. In the event the operating fan fails, local alarm is energized and the standby fan starts automatically.
When the supply system is operating, the system discharge air temperature controller directly controls the amount of chilled water entering the systems cooling coils. This temperature controller also controls the output of the banks of electric heaters.
When the handswitch for the tank vent filter system is in manual start, then it operates in conjunction with the Radwaste Building exhaust and supply systems. The control switch of this system's fan is on the local control panel and fan failure is alarmed on the same panel. High temperature and high-high temperature in the charcoal adsorber are alarmed directly in the control room. The tank vent filter system filter train high differential temperature is alarmed on the local panel.
When the charcoal adsorber approaches ignition temperature, the high-high temperature switch trips the fan.
The electric heater in the duct upstream of the filter train operates only if the filter train exhaust fan is running. The electric heater is used to limit the humidity of the air entering the charcoal filter.
9.4.3.3 Safety Evaluation The failure of the radwaste building HVAC systems or their components will not compromise any safety-related system or prevent a safe shutdown of the plant.
The charcoal filters contain fire detection instruments which annunciate high and high-high charcoal temperature on the HVAC panel in the control room. The exhaust air is checked for radiation by the radiation monitors in the turbine building exhaust vent.
9.4.3.4 Tests and Inspection The system was preoperationally tested in accordance with the requirements of Chapter 14.
Maintaining normal conditions verifies that the system is performing properly during operation.
The filter and ductwork in-service tests and inspections are described in Table 9.4-1 items 12 and 13.
9.4.3.5 Instrumentation Requirements All hand control switches of the radwaste building HVAC systems are on the local control panels in the radwaste building. Local alarms exist at these panels, which also have annunciators that transmit a trouble alarm to the control room if any abnormal condition exists in the radwaste building HVAC systems.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-28 The following abnormal conditions are alarmed at local panels:
a)
All fan failures b)
High or low indoor/outdoor pressure differential c)
High pressure differential across the filter of the supply system d)
High temperature differential across the tank exhaust system filter train e)
High pressure differential across the HEPA filter of the tank exhaust system f)
Phase B overcurrent on the exhaust fan motors feeder breakers g)
Supply system electric heater trouble h)
High pressure differential across the HEPA filters of the exhaust system i)
High temperature in the Off-gas Area Cooling System.
The following are alarmed directly in the control room:
a)
Loss of ventilation in the radwaste building that is low flow of exhaust air b)
High and high-high temperatures in the tank exhaust system charcoal adsorber A pressure differential controller, with pressure sensors inside and outside the building, modulates the variable inlet vanes of the exhaust fans to maintain the building at a slightly negative pressure. A pressure differential indicator is also provided on the local control panel.
Pressure differential indicators are also provided locally at all the filters including the tank vent filter system charcoal adsorber.
A temperature sensor is provided at the supply system outside air intake plenum which automatically operates the radwaste building chilled water systems (see Subsection 9.2.12).
9.4.4 TURBINE BUILDING VENTILATION SYSTEM 9.4.4.1 Design Basis The turbine building heating, ventilating, and air conditioning (HVAC) systems have no safety-related functions.
The turbine building HVAC systems are designed to operate during normal operation and accomplish the following objectives:
a)
Provide a supply of filtered and tempered air to most areas of the building b)
Maintain airflow from areas of lesser to areas of greater potential contamination
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-29 c)
Maintain building spaces below the following maximum temperatures:
General Areas 104qF Electrical Rooms 104qF Mechanical Areas 120qF d)
Maintain the building minimum temperature of 40qF e)
Maintain the Turbine Building except the generator bay area, at a slightly negative pressure to minimize exfiltration to the outside atmosphere f)
Recirculate and cool space air to reduce exhaust volume g)
Exhaust air from potentially contaminated spaces through particulate and charcoal filters h)
Discharge all exhaust air through the turbine building exhaust vent i)
Provide cooling air to the motor generator sets 9.4.4.2 System Descriptions The airflow diagram for the turbine building HVAC systems is shown on Dwgs. M-174, Sh. 1 and M-174, Sh. 2. System design parameters are listed in Table 9.4-7. Cooling water is supplied to the HVAC cooling coils by the turbine building chilled water system described in Subsection 9.2.12. The instruments and controls shown on Dwg. VC-174, Sh. 1, should be considered an integral part of the system. The turbine building supply unit and associated return fans are located in the H&V equipment room at elevation 762 ft. 0 in. This room also contains the recirculation unit, the filtered exhaust unit, and the MG set cooling unit. The condenser area unit coolers are installed in the condenser area at elevation 676 ft. 0 in. The condensate pump room unit coolers are located in the condensate pump room at elevation 656 ft. 0 in. The Tool Room Facility exhaust fans are located in the tool room mezzanine adjacent to the southeast corner of the U2 turbine building.
The systems described are for the Unit 1 turbine building. Unit 2 systems are similar except for the Battery Room Exhaust Fan manual operation.
Supply System (V101)
The supply system unit housing contains two 100 percent capacity fans, a bank of chilled water cooling coils, a bank of electrical heating coils, and a bank of particulate filters. The unit is connected to a ductwork system with outlets, dampers, and controls to distribute tempered air throughout the building to maintain temperatures and airflows so that they meet the stated requirements. The air entering the supply unit contains at all times sufficient outside air for ventilation. This minimum quantity of outside air will be increased up to 100 percent of system airflow when outside air temperature makes this practicable.
The supply system must operate when the return air system is on. The reason is that the return air system fan, when started, pressurizes the supply system air plenum and therefore, the supply system must be on to offset this effect. Supply system fan operation and control is
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-30 accomplished manually from a local control panel. The supply system consists of two fans.
During normal operation one fan runs and the other is on automatic standby. In the event the operating fan fails, local alarm is energized and the standby fan starts automatically.
Return Air System (V104)
The return air system housing contains two 100 percent capacity fans that, through the associated ductwork system, exhaust air from clean areas. Depending on requirements of the supply system (V101), this air may be either exhausted directly to the turbine building vent or returned to the intake of the supply unit.
The return system fan operation and control is accomplished manually from a local control panel. The return system consists of two fans. During normal operation one fan runs and the other is on automatic standby. In the event the operating fan fails, local alarm is energized and the standby fan starts automatically.
Recirculation System (V105)
The recirculation unit housing contains two 100 percent capacity fans, a chilled water cooling coil and a bank of particulate filters. The housing connects to both a supply and a return ductwork system complete with outlets and dampers.
The recirculation system supplies and returns air to and from areas as required for cooling but does not affect access and clean areas.
The hand control switches of the recirculation system fans are located on the local control panel. The system is put into operation by manually starting one fan and setting up the second fan in standby mode. The standby fan starts automatically on failure of the operating fan.
Filter Exhaust System (V106)
The filtered exhaust system contains two 100 percent capacity fans and two filter housings, of 50 percent capacity each. Each filter housing contains prefilters, charcoal filters, and upstream HEPA filters. Air from potentially contaminated areas in the turbine building is routed through the filtered exhaust system before it is discharged to the atmosphere via the turbine building exhaust vent.
The backwash receiving tank for the CFS is an atmospheric tank, which connects directly into the existing filtered exhaust duct through a full flow HEPA filter. During the backwash process, air expelled from the tank is vented through the HEPA filter into the building filtered exhaust system.
The filtered exhaust system operates only if the supply system (V101) is operating. The exhaust system fan operation and control is accomplished manually from a local control panel.
The exhaust system consists of two fans. During normal operation one fan runs with both filter trains and the other is on automatic standby. In the event the operating fan fails, local alarm is energized and the standby fan starts automatically.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-31 MG Set Cooling System (V103)
The MG set cooling system unit housing contains two 100 percent capacity fans and a bank of particulate filters. Forced ventilation cooling of the MG set drive motor and generator is supplied by one of the two fans. During normal operation one fan runs and the other is on automatic standby. In the event the operating fan fails, local alarm is energized and the standby fan starts automatically. To prevent the MG set from overheating in the event of a pneumatic actuator damper motor diaphragm failure, the exhaust air damper and one half of the outside air intake damper are locked open. This allows the MG set to operate in a safe/reliable manner without the possibility of fresh air, exhaust air or recirculation air dampers failing due to diaphragm wear.
Return air from the drive motors and generators can either be directed to the atmosphere through the turbine building exhaust vent or back to the suction side of the fans.
The control switches of the MG set cooling system fans are located in the control room on the same board as the controls and instrumentation of the MG sets. This system is put into operation by manually starting one fan and setting up the second fan in standby mode. The standby fan starts automatically on failure of the operating fan.
Condenser Area Cooling (V113)
The condenser area unit cooler system consists of two pairs of unit coolers. Each unit cooler is sized for 50 percent of the load and its housing contains a fan and a bank of chilled water cooling coils. Each pair of unit coolers discharges cooled air through a common duct to the condenser area.
The control switch for each fan is located on a local control panel. One fan on each pair of unit coolers is manually started and the remaining unit may be either, manually started or placed in standby mode. If one unit of a pair is placed in standby mode, then a room thermostat automatically starts the standby unit when temperature rises to 120qF. The standby unit also starts automatically on failure of the operating unit.
Condensate Pump Room Cooling (V112)
The condensate pump room unit cooling system consists of four unit coolers. Each unit cooler is sized for 33.3 percent of the load and its housing contains a fan and a bank of chilled water cooling coils. Each pair of unit coolers discharges cooled air through a common duct to the condensate pump room.
The control switch of each fan is on a local control panel. Under normal operating conditions three fans are manually started. The fourth unit is set in standby mode. The standby unit starts automatically on failure of any of the three operating units or when the pump room temperature rises to the setting of the high temperature switch. The high temperature switch is set to ensure that a temperature of 104qF is not exceeded.
Battery Room Exhaust (V114)
The Battery Exhaust System consists of one 100% centrifugal fan. The fan discharges air from the Battery Room into the Turbine Building Exhaust Vent stack.
The hand control switch of the fan is located on a local control box. Fan failure is alarmed locally.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-32 Tool Room Facility Exhaust System (OV122A/B)
A common tool room facility serves both Unit 1 and Unit 2. It is located at the southeast corner of the Unit 2 Turbine Building at elevation 676. The existing turbine building east wall (with railway and personnel doors) serves as a common boundary of the turbine Building/Tool Room facility interface. The tool room is an extension of the turbine building HVAC system and will be maintained at a slightly negative pressure. Air is exhausted from the facility directly into the Unit 2 Turbine Building railroad bay.
Exhaust air is provided by two (2) 100 percent capacity variable speed fans when the doors to the turbine building are closed. When required, one fan is in continuous operation and one fan is in standby. The standby fan auto starts on loss of air flow. Both fans auto stop on signal from fire/smoke alarms. System control and indication is local.
Audio and visual local indication of auto start of standby fan is provided.
9.4.4.3 Safety Evaluation The turbine building HVAC systems have no safety-related functions.
The turbine building HVAC systems are designed to maintain airflows from clean areas to potentially contaminated areas and from areas of potentially lower level contamination to areas of potentially higher level contaminations, then through a filter exhaust system. All systems are provided with redundant fans; except for the Unit 2 Battery Room Exhaust Fan, upon any failure of any operating fan, the standby fan will be automatically started.
The main exhaust charcoal filters contain a fire detection system that annunciates on the control room panel when high temperature occurs. When the charcoal adsorber approaches ignition temperature, the high-high temperature switch trips the fan. A manual deluge system is available for Operations use should a fire occur. The exhaust air is monitored for radiation by the radiation detection system in the exhaust vent outlet.
9.4.4.4 Tests and Inspections All components are tested and inspected as separate components and as integrated systems.
After the ductwork system is installed and airflows are measured and adjusted to meet design requirements, all instruments are calibrated to the design conditions. The system was preoperationally tested in accordance with the requirements of Chapter 14.
Periodic flow measurements will be taken to verify the design condition in order to ensure operability and integrity of the system. The filter and ductwork in-service tests and inspections are described in Table 9.4-1, items 12 and 13.
9.4.4.5 Instrumentation Requirements All the hand control switches of the turbine building HVAC equipment (including the Battery Room Exhaust Fan for Unit 2), are on the local control panel in the turbine building, except for
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-33 the control switches of the fans in the MG set cooling system which are located in the control room and except for the Tool Room Facility Exhaust System controller which is located in the Tool Room Facility. The local control panel has an annunciator that transmits a trouble alarm to the control room if any abnormal condition occurs in the turbine building HVAC systems fans, filters or dampers, (except for Tool Room HVAC) Tool Room HVAC trouble will only alarm at the local panel in the tool room.
The following abnormal conditions are alarmed at the local control panel:
a)
All fan failures b)
High temperatures at the condenser area c)
High temperatures at the condensate pump rooms d)
High pressure differential across the upstream HEPA filter of the filtered exhaust system e)
High differential temperature across the filter train of the filtered exhaust system f)
High and low pressure differential between the generator area (clean) and condenser area (contaminated) g)
High pressure differential across the filter of the supply system h)
High differential pressure across the filter of the recirculation system i)
High differential pressure across the filter of the MG set cooling system j)
Supply fans (V101), return fans (V104), exhaust fans (V106), and MG set cooling fans (V103) motor feeder breakers phase B overcurrent k)
Supply system electric heater trouble Supply fan outside air low temperature alarm The following abnormal conditions are alarmed directly in the control room:
a)
Loss of ventilation in the turbine building b)
Pre-ignition and ignition temperatures of the filtered exhaust system charcoal filters c)
Turbine building vent effluent radiation monitoring system alarms listed in Section 11.5.2.1.2 Local pressure differential indicators are provided across all the filters. Pressure differential indicators are also provided on the local control panels to monitor the building pressure as well as differential pressures between clean and contaminated areas.
The condenser area and the condensate pump rooms are provided with room thermostats.
These thermostats automatically start their associated unit coolers when the temperature rises above set point.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-34 Inlet and outlet air temperatures of the recirculation and supply systems and the filter trains of the filtered exhaust system are displayed on temperature indicators at the local control panel.
9.4.5 PRIMARY CONTAINMENT ATMOSPHERE RECIRCULATION AND COOLING SYSTEM 9.4.5.1 Design Basis The primary containment atmosphere recirculation and cooling systems are designed to accomplish the following objectives during stable and transient operating conditions from start-up to full load to shutdown:
a)
Maintain temperatures in the various spaces within specified limits. The general drywell area will be maintained at an average temperature of 135qF, maximum not to exceed 150qF. The control rod drive area design temperature is 135qF, while maximum allowable temperature is 185qF. The area around the recirculation pump will be maintained at 128qF average and 135qF maximum. The drywell head area design temperatures are 135qF average and 150qF maximum (see Dwg. C-1815, Sh. 1).
b)
Provide for the primary containment air purge (see Subsection 9.4.2.).
c)
Prevent concrete structures within the containment from exceeding the maximum design temperature of 150qF locally.
d)
During post LOCA conditions selected drywell air cooler and reactor under vessel CRD area recirculation fan systems are designed to mix the drywell atmosphere to prevent hydrogen concentration build-up. This is the only safety-related function performed by the dry well unit coolers and the reactor under vessel CRD area recirculation fans.
The fan and the ductwork of the cooling systems serving the head area (1V414A&B), one of the recirculation systems serving the drywell general area (1V416A&B) and the recirculation fans serving the reactor under vessel CRD area (1V418A&B) are safety-related and engineered safety features. All other Unit 1 and 2 cooling systems are seismically analyzed to ensure that they present no hazard to the safety-related equipment and systems. Safety classification and seismic categories are shown on Dwg. M-177, Sh. 1. Pipe whip has not been considered as the pressure differential between the Drywell atmosphere and the inside of the duct is less than 6" W.G. and the fluid density is low.
9.4.5.2 System Description The air flow diagram for the drywell is shown in Dwg. M-177, Sh. 1. The duct layout is shown in Dwgs. V-26-2, Sh. 1, V-26-3, Sh. 1, V-26-4, Sh. 1, V-26-5, Sh. 1, V-26-6, Sh. 1, V-26-10, Sh. 1, V-26-11, Sh. 1, V-26-12, Sh. 1, V-26-13, Sh. 1, V-26-14, Sh. 1, and V-26-15, Sh. 1.
Design parameters are shown in Table 9.4-8. Cooling water to the cooling coils is provided by the reactor building chilled water system or, on loss of offsite power, by the reactor building closed cooling water system.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-35 The controls and instruments associated with each system are shown on Dwgs. VC-177 Sh. 1, and VC-177, Sh. 2, and should be considered as an integral part of that system.
The drywell air flow system in both units contain 14 unit coolers (7 pairs), 1 fan (approximately 8650 CFM) per cooler, and 1 cooling coil per cooler. Each cooler has an individually ducted supply system. The unit coolers are arranged in pairs. The two units of each pair are physically separated. However, they can be operated simultaneously if necessary to maintain the required space temperatures. During the high speed mode of operation units on standby, will start automatically on loss of air flow in the running cooler.
In addition, the drywell air flow system contains two (2) recirculation fans serving the reactor under vessel CRD area. During normal plant operation, one fan operates at high speed to provide ventilation to the under vessel CRD area; and the second fan which is on standby will start automatically upon loss of air flow to the running fan or if there is a high temperature condition in the under vessel CRD area.
The unit coolers and the recirculation fans are assigned (in pairs) to specific areas of the drywell as follows:
Unit Coolers V411A&B RPV support skirt flange area and reactor shield annulus. Cooling air is supplied through two ring headers, each with 12 evenly spaced penetrations through the reactor shield feeding outlets in the skirt flange area. From there the air is forced through the annulus between the RPV insulation and the shield and is exhausted to the drywell general area. Each supply air opening is furnished with a dispersing plate to prevent direct impingement of cold air against the RPV skirt.
Unit Coolers V414A&B Safety-related systems - serving the RPV head space and the main steam relief valve area. Cooling air is supplied to the head area through two outlets at an angle of 180q apart for maximum air mixing.
The air is exfiltrated through four openings in the seal plate into the top of the drywell.
Unit Coolers V415A&B Non-safety-related systems. Each system supplies its total air flow to the general drywell area around elevation 719'-1".
Unit Coolers V412A&B V413A&B V416A&B V417A&B Systems V416A&B are safety-related - Each system, except V417A&B, supplies a major portion of its air flow at the top of the drywell directly below the seal plate. Systems V417A&B supply a portion of the cooling air in the vicinity of the main steam relief valves. The supply duct outlets, at the top of the drywell, are arranged tangentially around the RPV, so that an even air distribution is maintained for cooling and air mixing.
Recirculation fans V418A&B Safety-related systems serving the CRD area. Ventilation air is supplied by these fans which are located close to the openings at an angle of 180q apart in the lower elevations of CRD pipe space. CRD pipe openings, at the top of the space, are used to allow the air to exfiltrate into the drywell general area.
The cooling units and the recirculation fans are connected to ductwork on the discharge side only. Return air enters each unit cooler and the recirculation fans directly from the space.
Physically the unit coolers and the recirculation fans are dispersed around the RPV in the lower
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-36 section of the drywell between elevations 704 ft-0 in. and 714 ft-0 in.
The unit coolers and the recirculation fan are provided with two speed motors. The low speed operation is for the drywell post LOCA conditions and the integrated leak rate test, and the high speed operation is for normal conditions. The fan impellers are subject to a 125% overspeed test to provide assurance that they will not generate missiles.
Each drywell unit cooler is provided with the following controls (see Dwgs. VC-177, Sh. 1 and VC-177, Sh. 2 for control diagrams):
a)
A four position switch - start high; start low; auto high; stop - (located in the control room) b)
A pressure differential switch across each fan (flow detection function) - (local) c)
Temperature sensors on inlet and outlet - (local) d)
Temperature sensor on cooling coil leaving water line - local (see Subsection 9.2.12.3.)
e)
Local high outlet air temperature alarm, and an individual alarm in the control room f)
Local high chilled water outlet temperature alarm, and an individual alarm in the control room g)
Fan failure alarm in the control room h)
Fan starter switch bypass indication in the control room, for the safety-related unit coolers only In addition, a common local temperature indication and alarm panel, for both air and chilled water, is in the reactor building outside the primary containment.
Each reactor under vessel CRD area recirculation fan (V418A&B) is provided with the following controls:
a)
Four position switch-start high, start low, auto high and stop (located in the control room).
b)
Fan starter switch bypass indication in the control room.
Ambient temperature of various areas of the primary containment is monitored (See Subsection 6.2.1.1). The high temperature signal or the failure of the running fan for the reactor under vessel CRD areas will automatically start the CRD area standby recirculation fan, if it is placed in auto-start. The high temperature detected in the general drywell area or the failure of the running drywell unit cooler fan will automatically start the standby unit cooler of the pair, if it is place in auto-start. In the event that the average air temperature in the drywell cannot be maintained with (14) drywell coolers the reactor will be shutdown in accordance with the technical specifications.
All drywell unit coolers and the under vessel CRD area ventilation fans, including standbys, can be operated manually from the control room, if necessary to control the drywell temperature.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-37 All operating modes of the drywell coolers are shown in Table 9.4-9.
9.4.5.3 Safety Evaluation The Primary Containment atmosphere and recirculation cooling system is located within the Seismic Category I reactor building. Wind and tornado protection is discussed in Section 3.3.
Flood design is discussed in Section 3.4. Missile protection is discussed in Section 3.5.
Protection against dynamic effects associated with the postulated rupture of piping is discussed in Section 3.6. Environmental design considerations are discussed in Section 3.11.
The low speed operation of the drywell unit coolers V414A&B, V416A&B and the under vessel CRD area recirculation fans V418A&B is the only safety-related function of the system. For failure mode and effect analysis see Table 9.4-10. For high speed operation, during normal plant operation, none of the drywell unit coolers and under vessel CRD area recirculation fans have any safety-related function. Fans are started manually. If a fan fails to start or fails during operation, the standby fan starts automatically when on "Auto-High" mode. The failure is annunciated in the control room. This is accomplished by use of pressure differential switches across each fan.
To ensure continuous operation during loss of offsite power, all drywell unit cooler fans including under vessel CRD area recirculation fans and controls are on the emergency power supply.
Units A are on Division I Power Supply and Units B are on Division II Power Supply.
9.4.5.4 Tests and Inspection Tests and inspections described under items (1) through (3), (13) and (14) in table 9.4-1 apply to reactor under vessel CRD area recirculation fans. With the exceptions of items (4) and (6) through (12), (15) and (16), all the tests and inspections described in Table 9.4-1 apply to the drywell unit coolers.
The system was preoperationally tested in accordance with the requirements of Chapter 14.
The recirculation fans V418A&B were pre-operationally tested in accordance with the requirements identified in the design modifications under which they were installed.
9.4.5.5 Instrumentation Requirements Each drywell unit cooler for both Units 1 and 2 is controlled from the control room by a four position starter switch. Each under vessel CRD area recirculation fan is controlled from the control room by a four position starter switch.
Failure of any fan is alarmed in the control room. For each cooler, high air and water discharge temperatures are alarmed individually on the local control panel, and in the control room, as a group alarm. Safety-related unit cooler fan and recirculation fan starter switch bypass is indicated in the control room.
Fan starter switch circuits for the safety-related coolers and recirculation fans are safety-related.
All other controls and instrumentation, including alarms, are not safety-related. The safety-related switches are qualified to Seismic Category I requirements. Isolating relays are provided
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-38 to separate safety-related from non safety-related control circuits.
9.4.6 REFUELING AND SPENT FUEL AREA VENTILATION SYSTEM The refueling and spent fuel area ventilation system is part of Zone III ventilation system described in Subsection 9.4.2.
The following features are provided to control air distribution in the spent fuel area in order to reduce concentration and spread of airborne radioactive contaminants within the refueling floor:
a)
Exhaust air registers high over the spent fuel pool, in addition to general exhaust registers on the west wall of the refueling floor. (See Figure 9.4-17.)
b)
The high exhaust air duct damper over the refuel pool is locked into position to provide design minimum flow and the wall exhaust air duct damper on the refuel floor wall is locked into position to provide design maximum flow. This ensures adequate ventilation during both normal and emergency plant operations.
9.4.7 DIESEL GENERATOR BUILDINGS VENTILATION SYSTEMS 9.4.7.1 Design Basis The H&V systems for the diesel generator buildings have a safety-related function. They are designed to maintain a suitable environment for the diesel generators and their accessories during all modes of operation. To ensure proper diesel generator operation, Diesel Generator Rooms A, B, C and D are individually ventilated and heated not to exceed a maximum design room temperature of 120qF and a minimum design room temperature of 72qF. The Diesel Generator 'E' building is ventilated and heated to maintain the space temperature in accordance with the design temperature parameters listed in Table 9.4-11b.
9.4.7.2 System Description Diesel Generator Rooms A, B, C and D are provided with a separate ventilation system as shown in Dwgs. VC-182, Sh. 1, and M-182, Sh. 1. The Diesel Generator 'E' building ventilation system is shown on Dwgs. V-182, Sh. 8, and M-182, Sh. 2. Each system is designed to modulate outside/return air flow ratio from 0 to 100 percent depending on the respective room cooling demand. Design parameters are listed in Tables 9.4-11 and 9.4-11A.
In addition to the design features which minimize the impact of dust on the operation of all five diesel generators, the preventative maintenance program for the control cabinets include requirements for cleaning out dust accumulation when the equipment is checked.
9.4.7.2.1 Diesel Generator Rooms A, B, C and D Each supply fan starts 2 minutes after its associated diesel receives its start signal or when the room temperature, sensed by a start temperature switch, exceeds approximately 95qF and
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-39 continues to run after the diesel stops until the temperature in the room is below the stop thermostat cutout setting of approximately 85qF. Each supply fan also automatically starts if its associated room temperature reaches a high-high value, resulting from fan control failure due to a fire in the control room, and stops after adequate room cooling has occurred. The fan discharge air temperature is controlled by modulating outside air intake, exhaust, and recirculation dampers. Ventilation is provided by infiltration when the diesels and fans are off.
Circulating fans, located in the basement of each diesel generator room, circulate air between the basement and main floor. These fans are manually started by a local hand switch. These fans are not safety-related. Heating for each room is provided by thermostatically controlled electric unit heaters that operate when the room temperature falls below approximately 72qF.
The basement is heated with electric wall heaters, which are controlled by individual thermostats. The heating systems are not safety-related.
The ventilation and combustion air is protected from dust by locating the air intake/combustion air filter in a separate compartment inside the building about 25 ft. above the grade (676'-0) elevation, see Figure 9.5-27. In addition, further dust protection is provided by the physical layout of the building to its immediate surroundings. The Diesel Generator Building is surrounded by grass, gravel, and asphalt. Considering the location of the air intake, the combustion air dust exposure is minimum.
9.4.7.2.2 Diesel Generator 'E' Building Two (2) 50 percent capacity supply fans, two (2) 50 percent capacity exhaust fans and one (1) 100 percent capacity battery room and basement exhaust fan were selected to ventilate the building. The ventilation system is designed as safety-related and Seismic Category I.
The first set of interlocked supply and exhaust fans maintain space temperature below 100qF by means of damper modulation and starting of fans from the space thermostat. The second set of interlocked supply and exhaust fans start when the indoor temperature rises above 110qF. This arrangement of one (1) 50 percent capacity supply and one (1) 50 percent capacity exhaust fan running during normal ventilation mode is furnished to conserve energy. No filtration or cooling is provided in the ventilation system. The modulating damper system will control temperature and is designed to ensure full ventilation on a loss of power to the respective inlet and outlet modulating dampers; as they will fail in the open position. Normal ventilation is provided by leakage through the dampers when the ventilation supply fan is not operating.
The exhaust fan for the battery room and basement is manually operated, will run continuously, and the fan motor was selected for explosion-proof construction.
The heating system for all areas consists of electric unit heaters and electric baseboard heaters.
The heaters are not safety-related and are designed to commercial industry standards. They are, however, supported to Seismic Category I requirements to avoid potential safety impact concerns. The heaters have built-in thermostats to automatically maintain space temperature in accordance with the design parameters listed in Table 9.4-11B.
The building HVAC system will automatically shut down in the event of a fire unless the diesel generator is operating in the emergency mode.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-40 The ventilation and combustion air is protected from dust by locating the air intake/combustion air filter in a separate compartment inside the building about 35 ft. above grade elevation.
9.4.7.3 Safety Evaluation The Diesel Generator A, B, C and D fan systems are located in a separate room within the Seismic Category I Diesel Generator Building. The Diesel Generator 'E' fan system is located within the Seismic Category I Diesel Generator 'E' building. The ventilation system required for heat removal from each room is safety-related and designed to Seismic Category I requirements. For failure mode and effect analysis see Table 9.4-12. Wind and tornado protection is discussed in Section 3.3. Flood design is discussed in Section 3.4. Missile protection is discussed in Section 3.5. Protection against dynamic effects associated with the postulated rupture of piping is discussed in Section 3.6. Environmental design considerations are discussed in Section 3.11.
9.4.7.4 Test and Inspection With the exception of items 4 through 12, 15, and 16, all tests and inspections described in Table 9.4-1 apply to safety-related components of the diesel generator ventilation system, with the addition of the manufacturer's motor test reports. These reports provide the following data for each Diesel A through D ventilation supply fan motor (0V512A, B, C, and D), and for the E Diesel building ventilation fan motors (0V511E and 0V512E1, 2, 3, and 4):
a)
Running light current (no load) b)
Power input c)
High potential d)
Bearing inspection (rotor gap and end play, for the A through D fans), or bearing design life (E fans) e)
Calculated locked rotor current The system was pre-operationally tested in accordance with the requirements of Chapter 14.
9.4.7.5 Instrumentation Requirements 9.4.7.5.1 Diesel Generator A, B, C and D Building Each ventilation system for an aligned diesel generator can be individually controlled from the control room. The system can be started manually or automatically when in the auto mode, the diesel start signal or the tripping of the high temperature switch causes the ventilation system to operate. An additional temperature switch is provided in each diesel generator room to detect high-high room temperature resulting from fan control failure due to a fire in the control room.
Detection of high-high temperature will actuate the switch causing transfer of controls from the control room circuit to this temperature actuated control circuit and automatically start the associated fan. This occurrence will also result in "fan trouble" annunciation in the control room.
A low temperature setpoint is also provided to stop the fan after adequate cooling has occurred.
In addition to the fan start and stop temperature switches a low temperature and two high temperature switches in each diesel room actuate alarms in the control room in case of abnormal temperature conditions. Failure of any ventilation component resulting in loss of air flow also alarms in the control room.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-41 9.4.7.5.2 Diesel Generator E Building When Diesel Generator 'E' is aligned for either Diesel Generators A, B, C or D, the Diesel Generator 'E' ventilation system can be manually controlled from the control room. If Diesel Generator 'E' is not aligned to an ESS bus, the Diesel Generator 'E' ventilation system can be manually controlled only from local Panel 0C577E. Whether Diesel Generator 'E' is aligned or not the ventilation system can be started automatically when in the auto mode by the tripping of either of the two high temperature switches. In addition to the fan start and stop temperature switches, there are three low temperature and two high temperature switches in the Diesel Generator 'E' building which actuate alarms on Panel 0C577E. These alarms are then combined and reflashed in the control room as a general trouble alarm for Panel 0C577E.
Failure of any ventilation component resulting in loss of air flow also alarms in the control room.
9.4.8 ENGINEERED SAFEGUARD SERVICE WATER PUMPHOUSE VENTILATION SYSTEM 9.4.8.1 Design Basis The H&V system for the ESSW pumphouse has a safety-related function. It is designed to maintain a suitable environment for the ESW and RHRSW pumps and their associated accessories. To insure proper pump operation each of the two separate areas is individually ventilated not to exceed a maximum design temperature of 104°F. The heating system is not safety-related but is designed to maintain the temperature above 60qF.
9.4.8.2 System Description Each of the ESW and RHRSW pumps is provided with a separate ventilation system as shown on Dwgs. VC-182, Sh. 1, and M-182, Sh. 1. Each system is designed to modulate outside/return airflow ratio from 0 to 100 percent depending on the cooling demand. Design parameters are listed in Table 9.4-13. Each supply fan starts with its associated pump, or when temperature sensed by a start temperature switch exceeds approximately 95qF, and continues to run when the pump is shut off until the temperature in the room is below the stop thermostat cutout setting (75qF). The fan discharge air temperature is controlled by modulating the outside air intake, exhaust and recirculation dampers. The exhaust and intake dampers are designed to fail close in order to prevent freeze up in the event of damper control malfunction. Ventilation of the pump house when the pumps are not in operation will be provided by infiltration. Heating for each room is provided by thermostatically controlled electric unit heaters, which operate to maintain the room temperature above 60qF.
In the event of loss of control from the control room due to a control room fire, an additional temperature switch initiates autostart of the ventilation fan should pump room temperature rise above high temperature setting, and shuts off when the room temperature falls below the cutout setting.
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-42 9.4.8.3 Safety Evaluation The eight fans and components serving the ESSW pumphouse are located in the Seismic Category I ESSW pumphouse structure, which is divided into two areas with a missile proof separation wall.
The ventilation systems required for heat removal are safety-related and designed to Seismic Category I requirements. The heating system is not safety-related. For failure mode and effect analysis see Table 9.4-14. Wind and tornado protection is discussed in Section 3.3. Flood design is discussed in Section 3.4. Missile protection is discussed in Section 3.5. Protection against dynamic effects associated with the postulated rupture of piping is discussed in Section 3.6. Environmental design considerations are discussed in Section 3.11.
9.4.8.4 Test and Inspections With the exception of items 4 through 12, 15, and 16, all test and inspections described in Table 9.4-1 apply to safety-related components of the ESSW pumphouse ventilation system, with the addition of manufacturer's motor test reports. These reports provide the following data for each ventilation supply fan motor:
a)
Running light current (no load) b)
Power input c)
High potential d)
Bearing inspection (rotor gap and end play) e)
Calculated locked rotor current The system was pre-operationally tested in accordance with the requirements of Chapter 14.
9.4.8.5 Instrumentation Requirements Each ESSW pumphouse ventilation system can be individually controlled from the control room.
The system can be started manually or automatically. When in the auto mode, the corresponding pump start signal or the tripping of the high temperature switch will cause the ventilation system to operate. In addition to the fan start and stop temperature switches a high temperature switch is located in the vicinity of each pump along with a low temperature detector for each of the two pumping bays. The tripping of any of the switches causes alarms in the control room in case of abnormal temperature conditions. Failure of any ventilation component, resulting in loss of air flow, also alarms in the control room. An additional temperature switch initiates autostart of the ventilation fan upon high ambient pump room temperature. This provides cooling in the event control is lost due to a control room fire. This occurrence also results in "fan trouble" annunciation in the control room.
9.4.9 CIRCULATING WATER PUMPHOUSE AND WATER TREATMENT BUILDING HVAC 9.4.9.1 Design Basis The HVAC systems for the circulating water pumphouse and water treatment building have no safety-related functions and are only used to maintain a suitable environment for the circulating
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-43 and service water pumps, the water treatment equipment and all associated accessories.
To ensure proper pump operation, the circulating water pump room is heated and ventilated not to exceed a maximum design temperature of 104qF, during plant operation, and a minimum design temperature of 40qF during plant shutdown. The diesel driven fire pump room (located in the circulating water pumphouse) heating and ventilation is designed to maintain a minimum of 70qF when the pump is not in operation, and a maximum temperature of 104qF during pump operation. The water treatment building minimum design temperature is 60qF, with the exception of the lab where the design temperature is 72qF. Ventilation is provided for the water treatment building.
9.4.9.2 System Description The circulating and service water pump area is ventilated by 20 roof mounted exhaust fans, controlled by their individual thermostats. Outside air is drawn through the louvers/dampers, which are located at ground level on the east side of the building, and exhausted through the roof. Each fan and its associated damper is controlled by a thermostat, which is located adjacent to a pump motor.
The fire pump room is normally ventilated by a roof mounted ventilation fan which also exhausts air from the sump area of the pumphouse. During operation of the diesel fire pump, the inlet dampers open to provide outside air for combustion and cooling. Prior to the room temperature reaching 90°F with the diesel running, a thermostat will start the exhaust fan, or, prior to the room temperature reaching 90°F and the diesel is not running, the thermostat will open the intake damper and start the exhaust fan.
The water treatment building is ventilated by a number of different fan systems. The main system contains two in-line axial fans, one operating continuously, the other being on standby.
Air is exhausted from the acid storage room and the water treatment rooms (Elevations 676'-0" and 693'-0"), by the main system. Tempered air is drawn through transfer grills into the acid storage room from the circulating pump room. Outside air is also drawn into the water treatment room (el. 693'6-0"). Prior to the water treatment room (el. 693-0) temperature exceeding 90°F, a roof mounted exhaust fan starts and draws in additional outside air through a three position damper cooling area.
The toilet and janitor's closet are ventilated by a common roof exhaust fan. The laboratory is also ventilated with a roof mounted exhaust fan and cooled by a through-wall air conditioning unit.
See Dwgs. M-173, Sh. 1 and VC-173, Sh. 1. Design parameters are listed in Table 9.4-15.
Heating for the circulating water pumphouse and the water treatment building is provided by electric unit heaters, base board heaters and cabinet connectors. Each of these heating devices is controlled by its individual thermostat.
9.4.9.3 Safety Evaluation The HVAC systems for the circulating water pumphouse and water treatment building are not
SSES-FSAR Text Rev. 72 FSAR Rev. 68 9.4-44 safety-related, however, there is a redundant fan for the main ventilation system in the water treatment building. Two redundant unit heaters have been designed as back up heaters to assure 60qF temperature for the acid storage room.
9.4.9.4 Test and Inspections All equipment will be tested after installation, to verify its design conditions. The system will be pre-operationally tested in accordance with the requirements of Chapter 14.
9.4.9.5 Instrumentation Requirements The HVAC systems in the circulating water pumphouse, and water treatment building are controlled by local thermostats or by locally mounted switches, which can override the thermostat. There are no HVAC systems in this building that can be controlled from the control room. High temperature in the vicinity of each circulating water pump is detected and alarmed individually on a local control panel and in the control room as a group alarm.
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- 1)
GENERAL a)
All safety related components identified in Table 3.2-1 are designed, fabricated, installed, and tested under quality assurance requirements in accordance with Appendix B to 10CFR50.
b)
For systems that must perform a safety related function, periodic in-service testing of all fans, valves, controls, and instrumentation in the systems will be performed.
All motor-operated valves and dampers will be tested by opening and closing the valve or damper.
c)
Equipment in Seismic Category I systems is required by specification to meet the seismic requirements for this project. Before each equipment item is shipped, the supplier of that item is required to submit an adequate analysis or applicable test data as evidence of compliance, which is approved by PPL.
d)
Systems designed to meet Seismic Category I requirements are subjected to a program of plant and field testing.
e)
All standby units will be tested at periodic intervals to verify the operation of essential features. Periodic tests of the activation circuitry and the system components will be conducted during normal plant operation.
- 2)
FANS All centrifugal and propeller fans are tested in accordance with the AMCA Standard Test Code for Air Moving Devices, Bulletin 210. Vane axial fans are tested in the field for flow and pressure requirements. Blade setting adjustments are made to correct flow rates when necessary.
- 3)
MOTORS All motors are built, designed, rated, and tested in accordance with NEMA-MG-1.
Category I motors will have certification for the NEMA tests required in Publication No. MG-1. Motors used within the containment comply with IEEE 334.
- 4)
HEATING COILS The heating coils are furnished in accordance with the requirements of UL 1096 and the National Electrical Code, Article 424. The heating coils are installed according to the National Fire Protection Association Pamphlets 90A and 90B.
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COOLING COILS The cooling coils are furnished in accordance with ASHRAE 33 and ARI Standard 410.
All chilled water, service water, refrigerant coils and emergency service water coils are hydrostatically and pneumatically tested. Category I coils are seismically qualified by analysis or testing on a shaker table. The refrigerant coils and Emergency Service Water Cooling coils have been tested in accordance with ASME subsection 3 ND-6200 and ND-6300.
- 6)
MIST ELIMINATORS All eliminators are built in accordance with MSAR 71-45, "Entrained Moisture Separators for Fine (1 to 10 microns) Water-Airstream Service". The eliminators are Seismic Category I and have been seismically analyzed.
- 7)
PARTICULATE FILTERS (Supply Air)
The particulate filters are UL Class 1 approved under UL 900. The filter efficiency and performance is in accordance with ASHRAE Standard 52-68. The airflow resistance of the particulate filters is less than 0.35 in. wg (clean) and a maximum of 1.4 in. wg (dirty) at rated flow (2000 cfm). The filters have an efficiency rating of 85 to 90% by dust spot test on atmospheric dust.
- 8)
PREFILTERS (Used in Series with HEPA Filters)
The prefilters are certified to meet the standards for UL Class 1 filters. The airflow resistance of the prefilters at rated flow is less than 0.3 in. wg (clean) and 0.9 in. wg (dirty).
The prefilters have an efficiency rating of 80 to 95% by the dust spot test on atmospheric dust.
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HEPA FILTERS a)
Qualification Tests Prior to Installation The HEPA filters are constructed in accordance with MIL-F-51079A, Filter Medium, Fire Resistant, High Efficiency, and MIL-F-51068C, (Filter, Particulate High-Efficiency, Fire Resistant). The filters are Type IIC (SGTS) and IIB (all others).
The minimum tensile strength of the filter media is at least 2.5 lb/in. of width in accordance with the requirements of MIL-F-51079A. Note that the above-referenced military standards (MIL-F-51079A and MIL-F-51068C) have been deleted, but represent acceptable standards for installed (or previously purchased)
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The filter medium is securely fastened to the sides and ends of the filter frame with adhesive to seal the edges of the medium to the filter frame. Patching of holes or tears in the medium is not permitted.
The assembled filters are type tested in accordance with the requirements of UL 586 (High Efficiency Air Filter Units) to minimize fire hazards. The filters are approved UL Class 1.
Each filter has been tested for flow resistance at rated flow. The filter resistance does not exceed the rated pressure drop of 1 in. wg under this condition.
The filters have been rough handled with the Q110 Vibrating Machine, DLA 26-18-67, examined for damage and the DOP penetration determined in accordance with Section 4.3.4.1.
All filters have been subjected to acceptance tests made by an NRC quality assurance station. The filter efficiency exceeds 99.97% when tested with monodispersed, thermally generated DOP aerosol having a mean particle size of 0.3 micron.
Filters selected at random from the manufacturer's production line have been subjected to moisture, overpressure resistance, and filter dust loading tests in order to initially qualify the filters. The moisture and overpressure resistance tests were performed in accordance with MIL-F-51068 or ASME AG-1-1997 (see above discussion).
Each filter has been individually tested by the appropriate NRC quality assurance station at 100% and 20% of the rated capacity.
b)
Preoperational Tests for Acceptance (performed in filter train housing).
Visual and dimensional checks of the housing and mounting frames were made in the field for conformance with design specifications. Nonconforming items are rejected and replaced with acceptable equipment.
After installation, in-place testing of the HEPA filter efficiency was conducted in accordance with Section 10 of ANSI N510-1975 (formerly ANSI N101.1-1972).
The tests are conducted at the rated airflow, using the DOP aerosol test equipment, test procedures, and test reports specified in ANSI N510-1975.
The overall filtration efficiency is not less than 99.97%. When leaks that would result in inability to meet the specified system parameters exist, they are located and repaired by welding. The system is then tested again to ensure conformance with acceptance criteria.
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CHARCOAL ADSORBERS Charcoal adsorbers were tested as follows:
a)
Qualification Tests Prior to Installation
- 1)
Representative samples, taken from each batch of charcoal used for filling the adsorbers, were tested for adsorption efficiencies of radioactive elemental iodine, radioactive particulate iodine, and radioactive methyl iodine. The test methods were comparable to those shown in the Oak Ridge Laboratory Publication NSIC-65. The iodine loading in the test gas stream was about 0.01 mg/m . The removal efficiencies and residence times were at least as follows for relative humidities up to 70%:
2 3/16 in. (0.25 sec. res. time) 95% elemental 95% organic 6 in. (0.75 sec. res. time) 99% elemental 99% organic 8 in. (1.0 sec. res. time) 99% elemental 99% organic Calculations have been done to demonstrate that the residence times shown above are met.
- 2)
Each charcoal adsorber cell was tested for leakage using the test method presented in ANSI 510 (formerly AEC Report DP1082). The tracer gas used in the test was either R-112 or R-11, (tetrachlorodifluorothane or trichlorofluoromethane). The tracer gas was mixed into the rated airflow in accordance with the above procedure. Leakage paths were identified and blocked by welding, as necessary to meet the limiting requirements on leakage. The pressure drop across the cell was measured during the tracer gas test.
- 3)
The percentage of impregnation on the charcoal as well as type was verified by random lot sampling.
- 4)
In addition, tests were conducted in accordance with Paragraph 4.3 and Table #4 of RDT M16-1T to determine the following:
a)
Particle size b)
Ignition temperature
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Apparent density d)
Moisture content e)
Carbon tetrachloride activity b)
In-place Testing of Adsorber
- 1)
Refrigerant (R-11 or R-112) was introduced into the upstream side of the adsorber at a concentration of approximately 20 ppm at rated airflow.
The downstream concentration was less than 0.25 percent of the upstream 20 ppm. No more than four tests were conducted on any given charcoal adsorber cell. No radioactive isotopes were used in the efficiency tests performed on the charcoal adsorbers.
- 2)
The installed carbon adsorber filter bank was visually and dimensionally checked for conformance to the design specifications.
- 11)
FILTER HOUSINGS In addition to the housing manufacturer's shop tests, a field performance test was given to each housing. The leakage rate for each housing was less than 0.1 percent of the rated airflow in cubic feet per minute at 125 percent of the negative design pressure (-0.25 in.
wg).
- 12)
FILTER IN-SERVICE TESTS AND INSPECTIONS a)
The air filtering systems are subject to in-place bypass leakage testing before initial startup and after maintenance or modification that could affect filter bypass leakage. In addition, testing frequencies for in-place bypass leakage testing performed on non-safety related HEPA filters and Charcoal Adsorbers are based on the operating experience of the individual filter. Testing frequencies for SGTS and CREOASS are as defined in Tech Specs.
The testing frequency for removal of a non-safety related charcoal test canister is based on the operating experience of the individual filter. Testing frequencies for removal of charcoal test canisters from SGTS and CREOASS are as defined in Tech Specs.
b)
The periodic testing of the filter banks ensures that the filter bank performance is not degraded, through normal use or during standby service, to a level of below that assumed in the accident analyses. The test methods and sensitivities are the same as or equal to those for initial acceptance of the system components.
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c)
The results of all tests are made available upon completion of performance and acceptance by PPL.
d)
The following filter in-service tests and inspections are performed at regular intervals during plant life to determine that the filtration systems are functioning correctly:
- 1)
With the fan running, readings of the differential pressure gauges, mounted on the filter plenum are observed and recorded.
- 2)
Prefilters are replaced when the pressure drop across them reaches 1.0 in.
water column.
- 3)
HEPA filters are replaced when the pressure drop across them reaches 3.0 in. water column.
- 4)
Field leak tests are conducted after each change of HEPA filters in a system.
- 5)
Field leak tests of HEPA filter banks are made with dioctylphtholate.
An efficiency of less than 99.95% requires corrective action.
- 6)
Corrective action after a leak test may consist of increasing the contact pressure on a seal, or replacement of a cell or cells. After corrective action is taken, an additional leak test is made.
- 13)
DUCTWORK a)
Leakage tests on all Category I ductwork were conducted during construction.
b)
All air distribution systems were tested and balanced to provide design air quantities at each outlet within a tolerance of_+ 10 percent.
c)
Category I ductwork is supported by seismically designed duct hangers.
d)
All Category I ductwork is seismically designed and based on the analysis and test results which were conducted by Bechtel Power Corporation in April, 1976.
The test reports were based on:
- 1.
Structural Design of Class I Seismic HVAC Ducts.
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- 2.
Report on testing of HVAC Duct Specimens.
- 14)
CONTROLS a)
All controls and instrumentation were tested prior to plant operation.
b)
In-service tests and inspection procedures were incorporated in the plant operations manual and are performed at regular intervals during the life of the plant to show that the instruments are functioning properly. Recalibration, when necessary, is made at that time.
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BRANCH TECHNICAL POSITION-ETSB NO. 11-2 All secondary filter systems used for normal ventilation exhaust, comply to Branch Technical Position-ETSB No. 11-2 Design, Testing, and Maintenance Criteria for Normal Ventilation Exhaust System Air Filtration and Adsorption Units of Light Water-Cooled Nuclear Power Reactor Plants, with the exception of the following paragraphs (References are to BTP-ETSB 11-2).
a)
Reference:
Para B.2.a. Moisture separators are used only where moisture impingement may be a problem. Heaters are used to lower the relative humidity (R.H.) when the ambient exceeds 70% R.H. None of the secondary non-safety related filter systems require either a moisture separator or heater to reduce the moisture content or lower the R.H.
b)
Reference:
Para B.2.c. The pertinent pressure drop which is instrumented to signal, alarm, and record in the control room is the pressure drop across the first HEPA filter.
c)
Reference:
Para B.2.e. Overall design considerations include reduction of radiation exposures during routine maintenance and testing insofar as effectually possible. It is envisioned, however, that workers will not handle filter units after a design basis accident and will thereby avoid exposures associated with immediate post-accident filter handling. Accordingly, no efforts were made toward a unitized atmosphere cleanup train design in the interest of accident exposure reduction.
d)
Reference:
Para B.3.b. Since none of the HEPA filters separators are exposed to potential iodine removal spray, the units are not designed for contact with the spray. The military standards referenced by draft standard ANSI N509 have been deleted, but represent acceptable standards for installed HEPA filters. New HEPA filters will meet the standards presented in ASME AG-1-1997.
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Reference:
Para B.3.d. In this section and all others where reference is made to ORNL-NSIC-65, the reference is understood to be ERDA 76-21 or ANSI N509 where appropriate.
f)
Reference:
Para B.4.b and B.4.c. The spacing requirement is applicable to systems requiring operator access to remove filters and adsorber trays. Where unnecessary, the space is not provided, e.g., gasketless carbon adsorbers which are filled and emptied externally.
g)
Reference:
Para B.4.d. The length of pipe associated with manifolding would promote plate-out of the constituents of the sampled gas stream, thereby resulting in erroneous test results. The test probes are located in readily accessible locations; a minimum run of piping is used and manifolding is not employed.
h)
Reference:
Para B.5.a and B.5.c. The atmosphere clean up systems will be subject to in-place bypass leakage testing before initial startup and after maintenance or modification that could affect filter bypass leakage. In addition, testing frequencies for in-place bypass leakage testing performed on non-safety related HEPA filters and Charcoal Adsorbers will be based on the operating experience of the individual filter.
i)
Reference:
Para. B.5.d. The bypass leakage through the adsorber will be less than or equal to 0.05%. This exception is consistent with the guidance given in Section 6.3 of Regulatory Guide 1.140, Revision 2.
j)
Reference:
Para B.6.a and B.6.b. The testing frequency for removal of a non-safety related charcoal test canister will be based on the operating experience of the individual filter. Laboratory tests will be performed per ASTM D3803-89, Standard Test Method for Nuclear-Grade Activated Carbon, at a relative humidity of 70% for a methyl-iodide penetration of less than 10% for 2 inch filters and less than 1% for 6 inch filters. These requirements are consistent with the guidance given in Regulatory Guide 1.140, Rev. 1 and in SECY-97-299.
k)
Reference:
Table 2 Note b. The testing frequency for removal of a non-safety related charcoal test canister will be based on the operating experience of the individual filter.
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UNIT 2 EMERGENCY SWGR REFIGERATION UNITS The Refrigeration System Water Cooled Condensers are furnished in accordance with the requirements of ASME III, Section 3 Subsection ND and NF and ARI 450.
The Refrigeration System Compressors are furnished in accordance with requirements of ARI 520.
SSES-FSAR NIMS Rev. 57 TABLE 9.4-1 VENTILATION SYSTEMS TESTS AND INSPECTIONS The Compressor-Condenser Assembly is seismic Category I and will be seismically tested.
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SSES-FSAR Table Rev. 46 FSAR Rev. 65 Page 1 of 4 TABLE 9.4-2 CONTROL STRUCTURE HVAC SYSTEMS DESIGN PARAMETERS SAFETY RELATED SYSTEMS ITEM H&V SYSTEM OV-103 COMPUTER RM OV-115 BATTERY RM OV-116 CONTROL RM OV-117 SGTS EXH SYS OV-118 SGTS HTNG SYS OV-144 Type Air handling Air handling Indiv. fans Air handling Indiv. fans Air handling Number of Units 2
2 2 fans 2
2 fans 2
Flow rate each, CFM 31,950 30,600 3,500 20,545 3,500 3,000 Fan Type Drive No. of fans per unit No. of running fans Static pressure, each, in. wg Motor hp, each Centrif.
Belt 1
1 4.0 50 Centrif.
Belt 1
1 4.0 40 Centrif.
Belt 2
1 3.8 5
Centrif.
Belt 1
1 4.0 40 Centrif.
Belt 2
1 3.7 5
Centrif.
Belt 1
1 2.0 5
Cooling Coil No. of coils per unit Cooling capacity each, Btu/hr 2
1,132,000 2
773,600 N/A 2
539,300 N/A N/A Heating Coils No. of coils per unit Heating capacity each, Btu/hr 1
443,690 (130 kw)
N/A N/A N/A N/A 1
102,000 (30 kw)
Filters Quantity and size, in.
4-24x12x12 24-24x24x12 4-24x12x12 24-24x24x12 N/A 4-24x12x12 24-24x24x12 N/A 3-24x24x12 Pressure drop, in. wg Clean Dirty 0.5 1
0.5 1
0.5 1
0.5 1
Efficiency (1) %
90%
90%
90%
90%
(1) Dust spot test on atmospheric dust.
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NON-SAFETY RELATED SYSTEMS ITEM SMOKE REMOVAL 0V-104 ACCESS &
LAB EXH 0V-105 LAB FUME HOOD 0V-106 TOILET EXHAUST 0V-107 KITCHEN EXH 0V-108 ACCESS TOILET EXH 0V-112 ACCESS GEN EXH 0V-113 Type Indiv. fans Air handling Air handling Indiv. fans Indiv. fans Indiv. fans Indiv. fans Number of Units 2 fans 1
1 1
1 1
1 Flow rate each, cfm 6,000 10,600 1,950 125 200 1,300 5.115 Fan Type Drive No. of fans per unit No. of running fans Static pressure each, in. wg Motor hp, each Centrif.
Belt 2 per sys.
1 3.67 7.5 Centrif.
Belt 1
1 3.25 20 Centrif.
Belt 1
1 2.0 3
Centrif.
Belt 1
1 2.0 1
Centrif.
Belt 1
1 2.0 1
Centrif.
Belt 1
1 2.25 1.5 Centrif.
Belt 1
1 2.5 7.5 Cooling Coil No. of coils per unit Cooling capacity each, Btu/hr N/A 2
1,066,000 N/A N/A N/A N/A N/A Heating Coils No. of coils per unit Heating capacity each, Btu/hr N/A 1
680,400 (252 kw rated) 1 122,900 (36 kw rated)
N/A N/A N/A N/A Prefilters Quantity and size, in.
N/A 3-24x12x12 15-24x24x12 4(1)-16x25x2 N/A N/A N/A N/A Pressure drop, in. wg Clean Dirty Efficiency (2), %
.5 1
90%
0.18 0.5 (3)70-80%
4
- 1.
High velocity filters
- 2.
Dust spot test on atmospheric dust
- 3.
ASHRAE Standard 52-68 test method
SSES-FSAR Table Rev. 46 FSAR Rev. 65 Page 3 of 4 TABLE 9.4-2 (continued)
ITEM SAFETY RELATED EMERG. O/A SUPP 0V-101 (See Table 6.5-1)
NON-SAFETY RELATED CONTAMINATED FILTER UNITS EXHAUST SYS(5) 0V-114 Type Built-up unit Number of units 2
Flow rate each, cfm 7,180(4)
Fan Type Drive No. of fans per unit Centrif.
Belt 1
No. of running fans Static pressure each, in. wg Motor hp, each 1
10 30 Cooling Coil No. of coils per unit Cooling capacity each, Btu/hr N/A N/A N/A N/A N/A N/A N/A N/A Heating Coils No. of coils per unit Heating capacity each, Btu/hr N/A N/A N/A N/A N/A N/A N/A N/A Prefilters Quantity and size, in.
Pressure drop, in. wg Clean Dirty Efficiency(1), %
2-24x24x12 0.2 0.9 95 2-24x24x12 0.2 0.9 95 2-24x24x12 0.2 0.9 95 2-24x24x12 0.2 0.9 95
SSES-FSAR Table Rev. 46 FSAR Rev. 65 Page 4 of 4 TABLE 9.4-2 (continued)
ITEM SAFETY RELATED EMERG. O/A SUPP 0V-101 (See Table 6.5-1)
NON-SAFETY RELATED CONTAMINATED FILTER UNITS EXHAUST SYS(5) 0V-114 HEPA filter, upstream Quantity and size, in.
Pressure drop, in. wg Clean Dirty Efficiency(2), %
2-24x24x12 0.8 3.0 99.97 2-24x24x12 0.8 3.0 99.97 2-24x24x12 0.8 3.0 99.97 2-24x24x12 0.8 3.0 99.97 Charcoal Adsorber Type Depth, in.
Filter media Pressure drop, in. wg Efficiency Removing inorganic iodine, %
Removing organic iodine, %
Horizontal tray 2 3/16 Impregnated activated carbon 1.2 70 70 Horizontal tray 2 3/16 Impregnated activated carbon 1.2 70 70 Horizontal tray 2 3/16 Impregnated activated carbon 1.2 70 70 Horizontal tray 2 3/16 Impregnated activated carbon 1.2 70 70 HEPA filter, downstream N/A N/A N/A N/A (1)
Dust spot test or atmospheric dust.
(2)
By MIL Standard 282 DCP test method 0.3.
(3)
Retained for numbering purposes (4) 0F133 - 1,250 cfm 0F136 - 1,250 cfm 0F139 - 1,250 cfm 0F142 - 1,080 cfm Unfiltered Exh - 2,350 cfm (5) System includes four banks of filters.
(6) 70% Relative Humidity
SSES-FSAR Table Rev. 56 FSAR Rev. 71 Page 1 of 3 TABLE 9.4-3 REACTOR BUILDING HVAC SYSTEMS DESIGN PARAMETERS ITEM SUPPLY UNIT SYS. NO. V-202 EXHAUST FANS SYS. NO. V-205 EQUIP. COMP.
EXH. SYSTEM SYS. NO. V-206 SUPPLY UNIT SYS. NO. V-212 EXHAUST FANS SYS. NO.
V-213 FILTERED EXH.
SYSTEM SYS. NO.
V-217 MAIN STEAM PIPE TUNNEL COOLING UNITS SYS. NO. V-201 Type Built-up Unit Fans in Built-up Exh. Plenum Built-up Unit Built-up Unit Fans in Built-up Exh. Plenum Built-up Unit Built-up Unit Number of units 1
1 2
1 1
2 2
Flow rate each cfm for Unit 1 cfm for Unit 2 67,750 67,650 39,930 42,880 27,890 28,420 92,050 86,950 86,350 82,200 6,600 5,550 42,000 42,000 Fan Type Drive No. of fans per unit No. of running fans Centrif.
Belt 2
1 Centrif.
Belt 2
1 Centrif.
Belt 1
1 Centrif.
Belt 2
1 Centrif.
Belt 2
1 Centrif.
Belt 1
1 Vane-axial Direct 1
1 Total static pressure, each, in. WG Motor hp, each 5
100 4
50 14 100 4.5 100 4.5 125 15 30 15 25 Cooling Coils No. of coils per unit Cooling cap. each, Btu/hr.
4 420,000 N/A N/A N/A N/A 4
650,000 N/A N/A N/A N/A 2
304,000
SSES-FSAR Table Rev. 56 FSAR Rev. 71 Page 2 of 3 TABLE 9.4-3 (Contd)
REACTOR BUILDING HVAC SYSTEMS DESIGN PARAMETERS ITEM SUPPLY UNIT SYS. NO. V-202 EXHAUST FANS SYS. NO. V-205 EQUIP. COMP.
EXH. SYSTEM SYS. NO. V-206 SUPPLY UNIT SYS. NO. V-212 EXHAUST FANS SYS. NO.
V-213 FILTERED EXH.
SYSTEM SYS. NO.
V-217 MAIN STEAM PIPE TUNNEL COOLING UNITS SYS. NO. V-201 Heating Coils No. of coils per unit Heating cap, each, Btu/hr. (Unit 1) 4 1,810,000 (530 kW)
N/A N/A N/A N/A 4
1E227A-1,766,000 (517.5 kW) 1E227B-1,766,000 (517.5 kW) 1E227C-2,237,000 (655.5 kW) 1E227D-2,237,000 (655.5 kW)
N/A N/A N/A N/A N/A N/A Heating cap. each, Btu/hr.
(Unit 2) 1,810,000 (530 kW)
N/A N/A 2E227A-1,531,000 (448.5 kW) 2E227B-1,531,000 (448.5 kW) 2E227C-2,237,000 (655.5 kW) 2E227D-2,237,000 (655.5 kW)
N/A N/A N/A Prefilters or Filters Quantity and size, in.
Pressure drop, in. WG Clean Dirty Efficiency(3), %
36-24x24x12 0.5 1.0 50 min.
N/A N/A N/A N//A 16-24x24x12 0.3 0.9 85 min.
44-24x24x12(7) 0.5 1.0 50 min.
N/A N/A N/A N/A 2-24x24x12 0.3 0.9 85 min.
N/A N/A N/A N/A
SSES-FSAR Table Rev. 56 FSAR Rev. 71 Page 3 of 3 TABLE 9.4-3 (Contd)
REACTOR BUILDING HVAC SYSTEMS DESIGN PARAMETERS ITEM SUPPLY UNIT SYS. NO. V-202 EXHAUST FANS SYS. NO. V-205 EQUIP. COMP.
EXH. SYSTEM SYS. NO. V-206 SUPPLY UNIT SYS. NO. V-212 EXHAUST FANS SYS. NO.
V-213 FILTERED EXH.
SYSTEM SYS. NO.
V-217 MAIN STEAM PIPE TUNNEL COOLING UNITS SYS. NO. V-201 HEPA filter, upstream Quantity and size, in.
Pressure drop, in. WG Clean Dirty Efficiency(4), %
N/A N/A N/A N/A N/A N/A N/A N/A 16-24x24x12 1.0 3.0 99.97%
N/A N/A N/A N/A N/A N/A N/A N/A 2-24x24x12 1.0 3.0 99.97%
N/A N/A N/A N/A Charcoal adsorber Type Depth, in.
Filter media N/A N/A N/A N/A N/A N/A Vertical bed 6.in.
Impregnated activated carbon N/A N/A N/A N/A N/A N/A Vertical bed 6 in.
Impregnated activated carbon N/A N/A N/A Pressure drop, in. WG Efficiency Rem. Inorganic iodine, %
N/A N/A N/A N/A N/A N/A N/A N/A 3.1 99 99 N/A N/A N/A N/A N/A N/A N/A N/A 3.1 99 99 N/A N/A N/A N/A HEPA filter, downstream(5)
N/A N/A (5)
N/A N/A (5)
N/A (1)
Normally two filter trains operate in conjunction with one fan rated at 29,150 cfm.
(2)
Normally two filter trains operate in conjunction with one fan rated at 7,000 cfm.
(3)
Dust spot test on atmospheric dust.
(4)
By MIL Standards 282DOP test method on 0.3 micron particles.
(5)
All design parameters same as HEPA, upstream.
(6) 70% Relative Humidity.
(7) 36 (U1) 24X24X12 and 16 (U1) 12X24X12. 40 (U2) 24X24X12 and 8 (U2) 12X24X12
SSl!S-P'!UR T-'8~!_9.11-~
R?~:TlR BUILDIN3 -
S~P'!TI RELATED A~D RCIC AIR COOLING SJSTE" DESIGI PARA"ETERS
4----------------------------------------------------------------------------------------------------
P.11er-qen c-,
SlfGR R:>os
- oolinQ' Units S-,s. M:>. V-222 nctc t>11ap Rooa '7nit
- oolP.E:°S V-208 Ar.e RPCI Put1p Roo Unit CoolP.C'S V-209 A&B RflR Puap Roo*s Core spray Puap ~oo*s
_______ qnit_coo!ers _______ _ -------~nit_c2ole~s _______ _
RHR Hort.h RHR south North Sou~h V-210 8&0 V-210 A&C v-21, B&D v-211 Ar.C Type 8uilt-up unit 2
Bailt-up unit Built-up anit aailt-up unit Built-up unit Built-up unit Built-up ~nit lfn*bec: of Units Plow rate. each cf*
,an Tyoe Drive Mo. of fsns per unit
~o. of runninq fans Total pressur-e, in. VG 11Jotor. hD. each coolinq coil No. of coils pee unit coolinq c3pacity, P~ch<z>, Btu/hr
'P'ilt~rs ou,ntit.y an~ *size. in.
Pressure irop. ift. VG
- lean Dirty
!!fficiencT<:1>
1 "* 00 0 C2ntr if u1al Belt 1
1
- 3. la( 1 )
1'5 2
5,000 Vane-al[l:!l o i reci'.
1 1
O.CJJC!!>
- 1. S 191,172 (CKVt 100.000 ta76.,400 (P.aer:r.)
- o. 35
- 1. 00 90" II I" C * >
Nil N/A NIA
!l[tern3l unit static PCessur~ is 2 im. WJ.
2 7,000
'lane-aria.l Dire~t 1,
- 0. BSCS >
- 1. 5 1
1110.000 N /,\ < * >
N/A N/ll lf/'A 2
2 2
2 25,600 25,&0 0 10.000 10.000 VanP--a:1ial Vane-axial Vane-axial vane-arial Direct Direct Direct Direct 1
1 1
1 1
1 1
- O. S<JC !I>
0.89(!1)
- o. 85<5 >
0.850>
10 10
- 2. 0 2.0 1
1 1
520., 000 520,000 200,000 200.000 N/ll < * >
!f/A< * >
N/A<*>
':l'/A<*>
N/A N/A
!I/A
!f/A
!VA M/A
!1/11 H/A N/A N/A N/,\
N/A
<z>
Two in sec:ies coils. ona - chille1 water coil (CHWl supplied from RBCW, the other-emergency use control structure chilled water coil for unit 2 will use direct expansion coolinn coils with a capacity of approximently 360,000 BTU/HR.
Dust spot test on at 3spheric dnst.
2 in. thlck ~throw aw~y* rouqhiaq filters constra:tioa filters oaly. no filter-s used durin~
nor al plant opec:ation.
<sJ P~n tot~l press~re (static plus *elocity pressnrel.
Rev. 35, 07/84
SSES-FSAR Tabfe Rev. 36 TABLE 9.4-5 REACTOR BLDG HVAC SYSTEMS FAILURE MODE AND EFFECT ANALYSIS I
EFFECT OF PLANT I COMPONENT I
FAILURE FAfLURE ON OPERATING SYSTEM I
FAILURE EFFECT OF FAILURE MODE PLANT MODE COMPONENT I MODE ON THE SYSTEM DETECTION OPERATION E:mergency Power suppfy Total loss of None. All safety-related Alarm in the No loss of safety offsite power equipment and controls are control room function (LOOP) redundant and are powered from separate standby diesel generators.
Emergency Cooling fans Loss of a fan Eventual ross of the fans' Alarm In the No loss of safety (LOCAor RHR room-soulh associated pump.
control room function. The RHR LOCA + LOOP)
(V-210) pumps In separate rooms are redundanI (See See1ion 6 3)
Emergency Cooling fans Loss of both fans Eventual loss of the two Alarm in the No loss of safety
{LOCAor RHR room-south RHR pumps in the room.
control room function. The RHR LOCA+ LOOP)
(V-210) pumps in separate rooms are redundant
{See Section 6.3)
Emergency Cooling fans Loss of a fan Eventual loss of the fans' Alarm in the No loss o1 safety (LOCAor RHR room-north associated pump.
control room function. The RHR LOCA+ LOOP)
(V-210}
pumps in separate rooms are redundant (See Section 6.3}
Emergency Cooling fans Loss of both fans Eventual loss of the two Alarm in lrie No loss of safety (LOCAor RHR room-north RHR pumps in the room.
control room function. The RHR LOCA+ LOOP)
{V-210) oumps in se;>ara,e rooms are redundant (See Section 6.3)
Emergency Cooling fans Loss of one fan None. The standby fan Alarm in the No loss of safety (LOCAor RCICroom will automatically start.
control room function LOCA+ LOOP)
(V-208)
Emergency Cooling fans Loss of both fans Eventual loss of !he Alarm in the No loss of safety (LOCAor RCICroom RCICsystem control room function. The RCIC LOCA +LOOP)
{V-208) system is backed up by the HPCI system (See Sub$eciion 5.4. 6}
Emergency Cooling fans Loss of one fan None. The standby fan Alarm in the No loss of safety
{LOCAor HPCI room will automatically start control room
{V-209)
Emergency Cooling fans Loss of both fans Eventual Joss of the HPCI Alarm in the No loss of safety (LOCA or HPCI room system control room function. The HPCI LOCA+ LOOP)
(V-209) system is backed vp by the ADS or LPCI or Core Spray (See Section 6.3)
FSAR Rev. 59 Page 1 of 3
SSES-FSAR Table Rev. 36 TABLE 9.4-5 (Continued}
EFFECT OF PLANT COMPONENT FAILURE FAILURE ON OPERATING SYSTEM FAILURE EFFECT OF FAILURE MODE PLANT MODE COMPONENT MODE ON THE SYSTEM DETECTION OPERATION Emergency Cooling fans core Loss of a fan Eventual loss of the fans*
Alarm in the No loss of safely (LOCAor sprciy pumps associated pump control room function. The LOCA+ LOOP) room (V-211) core spray pumps in separate rooms are redundant (See Section 6.3}
Emergency Cooling fans core Loss of both fans Eventual loss of the two Alarm in the No loss of sate1y (LOCAor spray pumps core spray pumps in the control room function. The LOCA+LOOP) room (V-211) room core spray pumps in separate rooms are redundant (See Sectton 6.3)
Emergency Emerg&ncy Loss of one fan None. The standby fan Alann in the No loss or safety (LOCAor SWGR cool fans will automatically start.
control room function LOCA + LOOP)
(V-222)
Emergency Fan dischcirge Damper failure None. The dampers are Alarm in the No loss of safety (LOCAor dampers designed to fail closed.
control room function LOCA+ LOOP)
When the damper f;,ils closed it trips and locks out ils associated fan. Then standby fan automatically starts.
Emergency Emergency Loss of ESWS or None. The standby fan Alarm In the No loss ol safety (LOCAor service water loss of water due will automatically slart.
control room
!unction LOCA + LOOP}
cooling coils to pipe break Emergency Recirc system to Failure of None. The dampers are Damper position No loss of safety (LOCAor vent system one damper redundant and are in indication in the function LOCA+ LOOP) ductwork dampers parallel; therefore. failure control room 2 in parallei of one branch does not (HD-17601, affect the system air flow.
HD-17602 HD-17657)
Emergency Recirc system to Failure of None. The dampers are I Damper position No loss of safety (Zone Ill isolation with vent system one damper designed to fail in the safe indication in the function or without LOOP) ductwork dampers closed position. In addition.
control room 2 in parallel redundanl air flow s'Nitches (HD-17601.
are provided to alarm in the HD-17602 control room in the even1 of HD-17657) an air flow leak.
Emergency Backdraft isolatron Failure of The closure funetion is not (pipe break in rooms dampers (BOID) one damper credited in the high energy containing high line break analysis; energy piping) therefore, there is no impact if a damper fails to close.
FSAR Rev. 59 Page 2 of 3
SSES-FSAR Table Rev. 36 TABLE 9.4-5 {Continued}
EFFECT OF PLANT COMPONENT FAILURE FAILURE ON OPERATING SYSTEM FAILURE EFFECT OF FAILURE MODE PLANT MODE COMPONENT MODE ON THE SYSTEM DETECTION OPERATION Emergency Recirc system Loss of one fan None. The standby fan Alarm In lhe No loss of safety (LOCA or Zone Ill fans (0V-201) will automatically start.
control room function isolation with or without LOOP)
Emergency Recirc system fan Damper failure None. The dampers are Damper position No loss of safety (LOCA or Zone Ill disch dampers fai l-aosed. When ~"le indication in lhe funcUcn isolation with or (HD-07545) damper fails c!osed it trips control room wilhout LOOP)
<1nd isolates its associated fan. The standby fan will automatically start.
Emergency Recirc system Failure of None. The dampers are Damper position No loss of safety (LOCA or Zone Ill plenum lo SGTS one damper redundant and are in indication in the function isolation with or dampers parallel. Failure of one control room without LOOP)
(HD-07543) damper does not affect the system air flow.
Emergency Zone I isolation Fallure of None. The dampers are Damper position No loss of safety (LOCA loss of safety dampers one damper redundar,t and are in series.
indication in the function or LOCA + LOOP)
{HD-17524 Only one damper is needed control room HD-17576 to close and isolate. In HD-175861 addition. the dampers are designed to fail sate in closed position.
Emergency Unit2 Loss of one unit None. Upon loss of one Alam, in control No loss of safety (LOCAor Emergency SWGR unit. automatic transfer to room function.
LOCA+ LOOP)
Refrigeration the standby unit occurs.
Units (2K-210 &
FSAR Rev. 59 Page 3 of 3
SSES-FSAR Table Rev. 54 TABLE 9.4-6 RADWASTE BUILDING HVAC SYSTEMS DESIGN PARAMETERS SUPPLY SYS OFF GAS AREA FIL TE RED EXHAUST FILTERED LRWTANK Item UNIT COOLERS 0V-301A&B OV-309A&B OV-302A&B VENT OV-304 Type Built-up Unit Air Handling Unit Built-up Unit Built-up Unit I
Number of Units 2
I 2
2 1
I Flow Rate Each, cfm 60,540 25,815 68,905 fan 34,453(1) filter 1,000 FAN Type Centrif.
Centrif.
Centrif.
Centrif Drive Belt Belt Belt Belt No. of Fans per Unit 1
1 1
1 No. of Running, Fans 1
1 1
1 Static Pressure, Each, in. wq.
4 3.8 12 6
Motor hp, each 50 30 150 3
Cooling Coil No. of Coils per unit 6
2 n/a n/a Cooling capacity Each, BTU/hr 292.000 1.085.000 n/a n/a Heating Coils No. of Coils per unit 6
n/a n/a 1
Cooling Capacity Each, BTU/hr 1,020,000 n/a 25,500 (300 KW)
(7. 5 'fWV) 1 Filter Bank 2 Filter Banks each Containing Containing Prefilters Quantity and Size, in.
24-24x24x12 n/a 30-24x24x1 2 1-24x24x12 Pressure Drop, In. wg Clean
.5
- 0. 3 0.3 Dirty 1.6 0.9 0.9 Efficiencv(2l, %
50 min.
95 95 FSAR Rev. 61 Page 1 of 2
SSES-FSAR Table Rev. 54 TABLE 9.4-6 RADWASTE BUILDING HVAC SYSTEMS DESIGN PARAMETERS SUPPLY SYS OFF GAS AREA FIL TE RED EXHAUST FIL TE RED LRW TANK Item UNIT COOLERS 0V-301A&B OV-309A&B OV-302A&B VENT OV-304 HEPA Filter, Upstream n/a n/a Quantity and size, in.
30-24x24x12 1-24x24x12 Pressure Drop, in. wg Clean 1
1 Dirty 3
3 Efficiency C3l, %
99.97 99.97 Charcoal n/a n/a n/a Type Horizontal Tray Depth, in.
2 3116 Filter Media lmpreg. Act. Char.
Pressure Drop, in. wg 1.2 Efficiency Removing Inorganic Iodine, ~
70 Removina Oraanic Iodine, ~
70 HEPA Filter, Downstream n/a n/a n/a n/a (1)
Normally two filter units operate in conjunction with one fan, each fan rated at 50,000 cfm (2)
Dust spot test on atmosphere dust.
11\
By MIL Standard 282 DOP test method on 0.3 micron particles.
FSAR Rev. 61 Page 2 of 2
SSES-FSAR Teblo Rev 57 TABLE 9.4-7 TURBINE BUILDING HVAC SYSTEMS DESIGN PARAMETERS Fill Cond PP Cond Batt Rm Supply Sys MG Set Clng.
Return Sys Recirc Sys
. Exhaust Rm Ging Unit Clrs Exh Item V-101
- Suoo V-103 V-104 V-105 V-106 V-112 V-113 V-114 Type Built-Up Built-Up Built-Up Built-Up Built-Up Unit Coolers Unit Coolers Fan Number of units 2
2 2
2 2
4 4
1 Flow rate each. cfm 137.470 70,337 109,100 50,000
- 42. 760111fan 20.000 24,000 2,600 21, 380(1 l filter Fan Type Centrif.
Centrif.
Centrif.
Centrif.
Centrif.
Centrif.
Centrif.
Centrif.
Drive Belt Belt Belt Belt Belt Belt Belt Belt No. offans per unit 1
1 1
1 1
1 1
1 No. of running, fans 1
1 1
1 1
2 2
1 Static pressure, 5.5 4
4 6
18 2
2.5 2.5 Each. in. wq.
Motor hp. each 200 100 125 75 200 20 20 5
Cooling Coil N/A N/A N/A N/A NJA No. of coils per unit 8
6 2
2 Cooling cap. Each, 600.800 430,000 1,080,000 1,040.000 Btu/hr Heating Coils NIA NIA N/A NIA NIA N/A NIA No. of coils per unit 8
Cooling cap. Each, 765,000 Btu/hr (225 kW)
Prefilters (Filters) 2 filter housings. each containinq Quantity and size, in.
56-24x24x12.
36-24x24x12 24-24x24x12 21-24x24x12 Pressure drop. in. wq NIA NIA NIA Clean 0.5 0.5 0.5 0.3 Dirty 1.4 1.0 1.0 0.9 Efficiencvi2l. %
50min.
50 min.
SO min.
95 HEPA mter. upstream NIA NIA NIA NIA NIA N/A Quantity and size, in.
1-24x24x12 Pressure drop, in. wq Clean 1.0 Dirty 3.0 Efficiencv13>. %
99.95 FSAR Rev. 56 Page 1 of 2
SSES-FSAR Table Rev 57 TABLE 9.4-7 TURBINE BUILDING HVAC SYSTEMS DESIGN PARAMETERS Filt Cond PP Cond Batt Rm Supply Sys MG Set Ctng.
Return Sys Recirc Sys Exhaust Rm Clng Unit Clrs Exh Item V-101 Suoo V-103 V-104 V-105 V-106 V-f12
. V-113 V-114 Charcoal adsortier N/A N/A N/A N/A N/A NIA Vertical bed Type 6
Depth, In Impregnated Filter media activated charcoal Pressure drop, in. wq 3.1 Efficiency Rem. Inorganic iodine,%
99.5min (1)
Normally two filter units operate in conjunction with one fan, each fan rated at 40,000 cfm.
(<)
Oust spot lest on atmospheric dust.
{3)
Field tested to current procedure. A efficiency less than, or equal, requires corrective action FSAR Rev. 56 Page 2 of 2
Table Rev. 55 SSES-FSAR TABLE 9.4-8 Unit 1 and 2 Primary Containment Unit Coolers and Recirculation Fans Design Parameters FSAR Rev. 70 Page 1 of 1
SAFETY RELATED------------
NON-SAFETY RELATED------------------
Item RPV Head Area V-414 A&B CRD Area V-418 A&B Drywell General Area V-416 A&B RPV Annulus V-411 A&B Drywell General Area V-412 A&B Drywell General Area V-413 A&B Drywell General Area V-413 A&B Type Built-up Fan Built-up Built-up Built-up Built-up Built-up Number of units 2
2 2
2 2
2 4
Flow rate each, cfm 8,650/4320 8,650/4325 8,650/4320 8,650/4320 8,650/4320 8,650/4320 8,650/4320 Fan Vane-axial Direct 1
1 4.2/2.5 1,770 870 10/5 Vane-axial Direct 1
1
.25/.16 1,770 870 10/5 Vane-axial Direct 1
1 4.2/2.5 1,770 870 5/2.5 Vane-axial Direct 1
1 4.2/2.5 1,770 870 10/5 Vane-axial Direct 1
1 4.2/2.5 1,770 870 10/5 Vane-axial Direct 1
1 4.2/2.5 1,770 870 10/5 Vane-axial Direct 1
1 4.2/2.5 1,770 870 10/5 Type Drive No. of fans per unit No. of running, fans(1)
Total External static pressure, each, in. wq.
High speed, rpm Low speed, rpm Motor hp, each Hi/Lo speed Cooling Coil 1
676,000 N/A N/A 1
676,000 1
676,000 1
676,000 1
676,000 1
676,000 No. of coils per unit Cooling capacity each, Btu/hr Heating Coils N/A N/A N/A N/A N/A N/A N/A Filters(2)
(1)
See Table 9.4-9 for operating modes.
(2)
Throw away type roughing filters two inch thick were used during plant construction only. No filters are used during normal plant operation.
SSES-FSAR Table 9.4-9 I
DRYWELL UNIT COOLERS' AND RECIRCULATION FANS' OPERATING MODES I
Number of Power Requirements of Operating Unit Coolers and Recirculation Fans I
Condition of Operation Unit 1 Unit 2
! 1. Normal Operation I
- 7 to 14 Coolers I 7 to 14 Coolers/
10 HP each and 10 HP each 1 Recirc. Fan I 1 Recirc. Fan/
- 2. Loss of Chilled Water in Unit 1 (e) 14 Coolers/
7 to 14 Coolers/
I 1 O HP each and 10 HP each I
I 1 Recirc. Fan/
1 Recirc. Fan/
j 3. GE LOCA Signal in Unit 1 te>
4 Coolers/
7-14 Coolers/
I i
I 5 HP each and 10HP each 2 Recirc. Fans/
1-2 Recirc. Fans/
2.5 HP ea. tb)
I 5 HP each <c>
i i
- 4. Scram in Unit 1 (e) 7 to 14 Coolers/
j 7 to 14 Coolers/
1 O HP each and 10 HP each 1-2 Recirc. Fans/
1 Recirc. Fan/
I 5 HP 5 HP <al i 5. Loss of Offsite Power tfl 14 Coolers/
14 Coolers/
10 HP each and 10 HP each 1 Recirc. Fan/
1 Recirc. Fan/
- 6. Design Basis Accident (LOCA in Unit 1 4 Coolers/
14 Coolers/
and Loss of Offsite Power) {e)(I) 5 HP each and 10 HP each 2 Recirc. Fans/
1 Recirc. Fan/
- 7. Containment Purge1el 7 to 14 Coolers/
7 to 14 Coolers/
10 HP each and 10 HP each 1 Recirc. Fan/
1 1 Recirc. Fan/
Is. Integrated Leak Rate Test 14 Coolers max./
14 Coolers max./
Rev. 54. 10/99 Page 1 of 2
.I SSES-FSAR Table 9.4-9 DRYWELL UNIT COOLERS' AND RECIRCULATION FANS' OPERATING MODES Number of Power Requirements of Operating Unit Coolers and Recirculation Fans (a) 7 Coolers are initially started and continue to run. Additional Coolers are started as required to maintain the drywell temperature within the desrgn limits. One CRO area recirculation fan is operated normally. Second recirculation fan is placed in "auto high>>
(b)
All coolers stop automatically, 4 coolers and 2 CRD area recirculation fans must be started manually on low speed (only three are required).
(c) 7 coolers are initially started and continue to run. Additional coolers are started, as required, to maintain the drywell temperature within the design limits. One CRD area recirculation is operated normally. Second recirculation fan is placed in "auto-high" and it is started automatically on high temperature in the CRD area.
(d)
Not used.
(e)
For off-normal conditions occurring in Unit 2, the unit cooler requirements are reversed.
(f)
Conditions 5 and 6 affect diesel generator loading.
Rev. 54, 10/99 Page 2 of 2
SSES-FSAR FINAL TABLE 9.4-10 Primary Containment Atmosphere Recirculation and Cooling System Failure Mode and Effect Analysis Plant Operating Mode System Component Component Failure Effect Of Failure On The Failure Mode Effect Of Failure On Mode System Detection Plant Operation Emergency Power supply Total loss of offsite None. All units are powered Alarm in the control No loss of safety function.
power (LOOP) from the standby diesel room.
generators and will restart when emergency power is on.
Emergency (LOCA or Fans -
V414A&B Loss of one fan of the None. All ESF units are Indicating lights in the No loss of safety function LOCA + LOOP)
V416A&B pair. (loss of one manually started (two control room.
on loss of one of the two V418A&B division) redundant fans operating).
redundant fans.
NOTE:
In addition to 7 sets of unit coolers. primary containment atmosphere recirculation and cooling system includes 2 reactor under vessel CRD area recirculation fans. Analysis shown above applies to both Unit 1 and 2.
Rev. 54, 10/99 Page 1 of 1
i Type SSES-FSAR TABLE 9.4-11 DIESEL GENERA TOR A, B, C AND D BUILDING HVAC SYSTEMS DESIGN PARAMETERS Vane Axial Tubular Flow rate each, cfm 96,000 <2>
3,000 (2)
Propeller
~ropeller Fan Type Drlve Direct No. 9 Susp. Horiz.
No. of fans per diesel gen.
No. of running fans Static pressure, each, in wg Motor hp, each Cooling Coil Heating Coils Filters 1
1 1.64 40 N/A N/A NIA
' (1)
Typical for each emergency diesel generator
<2)
Allowable tolerances are+/- 10%
Rev. 54, 10/99 1
1 0.25 1.5 NIA NIA NIA Page 1 of 1
Item Type Flow Rate Each, CFM Fan Type Drive No. of fans
_ No. of running fans Static pressure, each, inw.g.
Motor hp, each Cooling air Heating coil Filters SSES-FSAR DIESEL GENERA TOR 'E' BLDG. HVAC SYSTEMS DESIGN.PARAMETERS
.Supply Vent System Exhaust Exhaust
- 0V-512E1 &
Vent System Vent System 0V-512E2
- 0V-512E3 0V-512E4 Vaneaxial Vaneaxial Vaneaxral 56,000 (l) 56,000 (l) 53,200 <1>
Propeller Propeller Propeller Direct Direct Direct 2
1 1
2 1
1 2.7 2.25 2.5 40 40 40 NIA NIA NIA NIA N/A N/A NIA NIA N/A (l)
Allowable tolerances are +/- 10%
Rev. 54, 10/99 Battery and Basement Exhaust Vent System 0V-511E Vaneaxial in-line 2,800 (1)
Propeller Direct 1
1 2.3 3.0 NIA N/A NIA Page 1 of 1
=
SSES-FSAR TABLE 9.4-11b DIESEL GENERA TOR 'E' BUILDING VENTILATION SYSTEM DESIGN TEMPERATURE PARAMETERS
~~~~\J~ss:tz~\:i~4~~~~kT~:~:=~~-~ !f ~;~~-um~er -
- -~..
~~~~--"'-'Winter Outdoor Ambient Conditions 92°Fd.B/78° w.b.
-5°F Indoor Design Conditions
- Elevation 675'-6" and 708' -0" with 120°F (Max) 72°F (Min)
DIG 'E' "On"
- Elevation 675'-6" and 708'-0". with 104°F (Max) 72°F (Min) l DIG 'E' "Off
- Elevation 656'-6" - Battery room 104°F (Max)
- 65°F (Min) with DIG 'E' "On" or "Off'
- Elevation 656'-6" Remaining Area 120°F (Max) 60°F (Min) with DIG 'E' ~'On"
- Elevation 656'-6" Remaini_~g Area 104°F (Max) 60°F (Min) with DIG 'E' "Off' Rev. 54, 10/99 Page 1 of 1
SS!S-PSAR IM!J,! 9._ ll-12 DIESEL GEM!RATOR BLDGS H&Y rAI~URE ~ODE AND ~PPECT AIALYSIS PU1'T OPEIIATUC PIODE
- Baerqenc, E*erqenc, (LOOP or LOCl
- LOOP)
SYSTE!'I COftPONElfT Power s11pplf Pan, inlet da per, exhaust da*per, and recirc da*per COl'IPOfEl'l'f PULURE ftODE Total loss of off Site POVf' r (LOOP)
~oss of fa~, any daaper. or co bina tion of daapers EP'PECT OP FAILOR!!: Olf TIU~ SIST!II lfone. Units are powered fro their associate~ diesel generators.
Possible loss of the
- entilation syste and e*entually loss of one diest-1 generator PAI'LtJR!
PIODE D!T!CrlOI EPPECT OP PlILURE ON PLAIIT OPBIATXO'II Ahr iR tlle control roo Alar in the control rooa.,.
High and low roo*
te peratures are alac ed also in control rooa.
!lo loss of safety fa.nction 110 loas of safety f11nction.
The reaining three diesel genet'lltora are capable of eeting all require11e11ts tor a safe shutdown of the plant.
IOT!:
Failure of. *the instcu eets such as te p. ele ent. te p.
transitter, and tep. controller codld r~salt i* failure of the daapers aftd e*entually loss of the dies~l genecator.
Rev. 35, 07/84
I SSES-FSAR TABLE 9.4-13 ESSW PUMPHOUSE HVAC SYSTEMS DESIGN PARAMETERS I
Unit ESSW Pump I
Common ESSW Pump Ventilation Fans Ventilation Fans Division I Pump Room:
1,2V-506A j
0V-521A,C Division II Pump Room:
Type Vane Axial Vane Axial Flow rate each, cfm 12,500 10,000 Fan Type Propeller Propeller Drive Direct Direct No. of fans per ESSW 2
4 Unit (1, 2, Common)
No. of running fans 1 (3) 1 (3) per running pump Static pressure, each, in wg 1
1 Motor*hp, each 5
5 Cooling Coil NIA N/A Heating Coils N/A N/A Filters N/A N/A (1)
(2)
Descriptions are typical for each of the four unit ESSW pump fans. Fans 1, 2V-506A in the Division I pump room serve Residual Heat Removal Service Water (RHRSW)
Pumps 1, 2P-506A; and fans 1,2V-506B in the Division II pump room serve RHRSW Pumps 1, 2P-506B.
Descriptions are typical for each of the four common ESSW pump fans. Fans OV-512A,C in the Division I pump room serve Emergency Service Water (ESW) Pumps 0P-504A,C; and fans 0V-521B,D in the Division II pump room serve ESW Pumps 0P-5048,D.
'3l Additional fan(s) adjacent to the running fan(s) may be started manually from the control room, or will be started automatically by the high temperature switch when additional cooling is required.
Rev. 54, 10/99 Page 1 of 1
SSES-FSAR Table Rev. 37 FSAR Rev. 64 Page 1 of 1 TABLE 9.4-14 ENGINEERED SAFEGUARD SERVICE WATER PUMPHOUSE H&V SYSTEMS FAILURE MODE AND EFFECT ANALYSIS PLANT OPERATING MODE SYSTEM COMPONENT COMPONENT FAILURE MODE EFFECT OF FAILURE ON THE SYSTEM FAILURE MODE DETECTION EFFECT OF FAILURE ON PLANT OPERATION Emergency Power Supply Total loss of offsite power (LOOP)
None. All units are powered from their associated diesel generators.
Alarm in the control room No loss of safety function Emergency (LOCA or LOCA + LOOP)
Ventilation fans Loss of the fan Loss of ventilation system and possible loss of all other ESF systems in the area such as the RHR service wtr system &
emergency service wtr system (one division only).
Alarm in the control room.
High and low temperatures in the building are also alarmed in control room.
No loss of safety functions. The remaining redundant systems are capable of safe shutdown of the plant.
Emergency (LOCA or LOCA + LOOP)
Intake, exhaust,
& return dampers Loss of any one or combination of dampers Possible loss of the ventilation system and eventually loss of all other ESF systems in the area such as the RHR service wtr system & emergency service water system (one division only).
Fan failure, high and low room temperatures are alarmed in the control room.
No loss of safety function. The remaining redundant systems are capable of safe shutdown of the plant..
NOTE 1:
Failure of the instruments such as temp. element, temp. transmitter, and temp. controller could result in failure of the dampers and eventually loss of ventilation systems.
item Type-Number of units Row rate each, cfm Fan Type Drive No. of fans per unit No. of running fans Total pressure, each, ln.wg.
Motor hp, each Cooling Coil Heating Coils Fetters Rev. 46, 06193 TABLE 9,4-15 CIRC. WATER PUMPHOUSE HVAC SYSTEMS DESJON PARAMETERS Roof Roof Roof Roof Mounted Roof Mounted Mounted Mounted.
Mounted 1
1 1
1 10 7,000 2,300 200 1,280 18,500 Centrff.
Centrff:
Centrif.
Centrif.
Propeller 9ett Belt Belt Belt Bett 1
1 1
1 1
1 1
1 1
As req.
0.5 o.s 0.5 0.625 0.5 2
.75
.25
.75 6
N/A NIA NIA NIA NIA NIA NIA NIA N/A N/A NIA NIA NIA NIA NIA Roof Tubufar Mounted 1
1 6,000 10,000 Centrif.
Ducted Propelter 8elt
- 9 Ceiling Susp 1
2 1
As req.
0.5 1
1.5 5
PLANT OPERATING MODE Elllergency F.iaergency (LOCA or LOCA +- LOOP)
Emergency (LOCA or LOCA + LOOP)
E*ergency (LOCA or LOCA + LOOP}
Rev. 35, 07/84 SYSTEM COMPONENT Power Supply Fans (OV117)
Fans (OV117) outlet dampers Isolation dampers (HD-0783))
TABLE 9.4-16 CONTROL ROOM & CONTROL* STRUCTURE HVAC SYSTEMS CONTROL ROOM FLOOR COOLING SYSTEMS FAILURE MODE AND EFFECT ANALYSIS COMPONENT FAIL!JRE MODE Total loss -of offsite power (LOOP)
Loss of one fan Damper fails and closes Damper failure EFFECT OF FAILURE ON THE SYSTEM None.
The systems are redundant and are powered from separate standby diesel generators.
None.
The standby unit automatically starts.
None.
The dampers are designed to fail safe in the close posltion.
When the da11per fails closed it trips and isolates its associated fan and the standby unit aut01a11tically starts.
None.
The tvo isolation dampers are in series and are designed to fail safe in the closed position.
Only one damper is needed to close and effectively isolate.
FAILURE MODE DETECTION Alar11 in the control room
- Alana 1n the control room Alarm in the control room Damper position indication in the control room EFFECT OF FAILURE ON PLANT OPERATION No loss of safety function No loss of safety function No loss of safety function No loss of safety function
PLANT OPERAtING MODE Emergency Err.ergency (LOCA or LOCA +LOOP)
F.niergency (LOCA or LOCA + LOOP)
Rev. 35, 07/84 SYSTEM COMPONENT Power Supply Fans (OV115)
Fans (OV115) outlet dampers TABLE 9.4-17 CONTROL ROOM & CONTROL STRUCTURE HVAC SYSTFMS COMPUTER ROOM FLOOR COOLING SYSTEMS FAILURE MODE AND EFFECT ANALYSIS COMPONENT FAILURE MODE Total loss of offsite power (LOOP)
Loss of one fan Daaper fails and closes EFFECT OF FAILURE ON TiiE SYSTEM None.
The systems are redundant and are powered from separate diesel generators.
None.
The standby unit automatically starts.
None.
The dampers are designed to fail safe in the closed position.
When the damper fails closed it trips its associated fan and the standby unit autO!lllltically starts.
FAILURE MODE DETECTION Alarm in the control room*
Alarm in the control room Alarm in the control room EFFECT OF FAILURE ON PLANT OPERATION No loss of safety function No loss of safety function No loss of safety function
SSES-FSAR Table Rev. 36 TABLE 9.4-18 CONTROL ROOM & CONTROL STRUCTURE HVAC*SYSTEMS CONTROL STRUCTURE H&V SYSTEMS FAILURE MODE AND EFFECT ANALYSIS EFFECT OF PLANT COMPONENT FAILURE FAILURE ON OPERATING SYSTEM FAILURE EFFECT OF FAILURE MODE PLANT MODE COMPONENT MODE ON THE SYSTEM DETECTION OPERATION Emergency Power Supply Total loss of None. The systems are Alann in the I No loss of safety offsite power redundant and are powered control room function
{LOOP) from separate standby diesel generators.
Emergency (LOCA or Fans (0V103)
Loss ot one fan None. The standby unit Alann in the No loss of safety radiation In outside air.
auto,.nalically starts.
control room function with or without LOOP)
Emergency (LOCA or Fans (0V103)
Damper failure None. The dampers are Alann in lhe No loss of safety radiation in outside air outlet dampers redundant and are designed control room function with or without LOOP) to fail safe in the closed position. When the damper fails dose it trips and isolates its associated fan and the standby unit automatically starts.
Emergency (LOCA or Isolation dampers Damper failure None. Redundant isolation Damper position No loss of safety radiation in outside air
{HD-07802) dampers are in series and indication in the function with or without LOOP)
{HD-07824) are designed to fail safe in control room the closed position. Only one damper is needed to close and effectively isolate.
Emergency (LOCA or Goofing coils Loss of cooling None. The redundant full Eventual loss of No loss of safety radiation In outside air coil due to leaks capacity unit train is put into chilled water.
function with or without LOOP) or rupture operation.
alann In the control room Emergency (LOCA or Electric heating Failure of heating None. The electric heating Temperature No loss of safety radiation in outside air coils coil ccils are not required to indicators at the function with or without LOOP) operate during emergency duct and in local operation.
control panels Emergency (radiation Isolation dampers Damper failure None. The redundant Damper position No loss of safety in outside air or Zone I, between Units 1 &
dampers are In series and Indication in the function II or Ill Isolation signals 2 (HD-07824) are designed to fail in the control room with or without LOOP) safe closed position.
FSAR Rev. 56 Page 1 of 1
SSES-FSAR Table Rev. 38 FSAR Rev. 63 Page 1 of 3 TABLE 9.4-19 CONTROL ROOM & CONTROL STRUCTURE HVAC SYSTEMS EMERGENCY OUTSIDE AIR SUPPLY SYSTEMS FAILURE MODE AN EFFECT ANALYSIS PLANT OPERATING MODE SYSTEM COMPONENT COMPONENT FAILURE MODE EFFECT OF FAILURE ON THE SYSTEM FAILURE MODE DETECTION EFFECT OF FAILURE ON PLANT OPERATION Emergency Power Supply Total loss of offsite power (LOOP)
None. The systems are redundant and are powered from separate standby diesel generators.
Alarm in the control room No loss of safety function Emergency (High outside air radiation or Zones I, II or III isolation signals)
Fans (0V-101)
Loss of one fan None. The standby fan automatically starts.
Alarm in the control room No loss of safety function Emergency (High outside air radiation or Zones I, II or III isolation signals)
Fan outlet dampers (HD-07811)
Damper failure None. The dampers are designed to fail close. When the damper fails closed it trips its associated train and isolates the entire filter train.
The standby train will then automatically start.
Alarm in the control room No loss of safety function Emergency (High outside air radiation or Zones I, II or III isolation signals)
Emergency outside air dampers (HD-07812, HD-07814)
Damper failure These are two sets of redundant dampers in parallel.
Because they are in parallel failure of one does not affect the system.
These dampers are designed to fail in the closed position because they were used for isolation during high chlorine condition Damper position indication in the control room No loss of safety function
SSES-FSAR Table Rev. 38 FSAR Rev. 63 Page 2 of 3 TABLE 9.4-19 CONTROL ROOM & CONTROL STRUCTURE HVAC SYSTEMS EMERGENCY OUTSIDE AIR SUPPLY SYSTEMS FAILURE MODE AN EFFECT ANALYSIS PLANT OPERATING MODE SYSTEM COMPONENT COMPONENT FAILURE MODE EFFECT OF FAILURE ON THE SYSTEM FAILURE MODE DETECTION EFFECT OF FAILURE ON PLANT OPERATION Emergency (High radiation in outside air or Zones I, II or III isolation signals)
Recirculation inlet inlet dampers (HD-07813)
Damper failure None. These dampers are designed to fail closed and are required to be closed during this mode of operation.
Damper position indication in the control room No loss of safety function Emergency (High radiation in outside air or Zones, I, II or III isolation signals)
Electric heating coil (0E-143)
Heater failure None. High temperature (pre-ignition) is alarmed in the control room. At a higher temperature (ignition) the train is tripped and isolated. The standby train automatically starts. When the heater fails (no heat) the train is also tripped and the standby train automatically starts.
Alarms in the control room (pre-ignition and ignition temperatures)
No loss of safety function Emergency (High radiation in outside air or Zones I, II or III isolation signals)
Prefilter, downstream and upstream HEPA filters High differential pressure across any of these components None. If any of these filters is completely clogged, air flow will be lost and the standby unit will automatically start.
Local differential pressure indicators.
Pressure differential across the upstream HEPA filter is recorded and alarmed in the control room in compliance with Regulatory Guide 1.52.
No loss of safety function
SSES-FSAR Table Rev. 38 FSAR Rev. 63 Page 3 of 3 TABLE 9.4-19 CONTROL ROOM & CONTROL STRUCTURE HVAC SYSTEMS EMERGENCY OUTSIDE AIR SUPPLY SYSTEMS FAILURE MODE AN EFFECT ANALYSIS PLANT OPERATING MODE SYSTEM COMPONENT COMPONENT FAILURE MODE EFFECT OF FAILURE ON THE SYSTEM FAILURE MODE DETECTION EFFECT OF FAILURE ON PLANT OPERATION Emergency (High radiation in outside air or Zones I, II or III isolation signals)
Charcoal absorbers (0F-125)
High temperature (ignition temperature)
None.
Pre-ignition temperature is alarmed in the control room. At a higher temperature (ignition) the fire protection deluge water valves are opened, the whole train is tripped and isolated and the standby train automatically starts.
Pre-ignition and ignition temperature alarms in the control room No loss of safety function Emergency (High radiation in outside air or Zones I, II or III isolation signals)
Q-listed fire protection backup deluge water valve (TV-07813)
Valve failure None. These values are designed to fail closed and are used to backup the non-seismically qualified deluge valves.
Alarm in the control room No loss of safety function
PLANT OPERATING MODE I
Emergency Emergency (LOCA or LOCA + LOOP)
Emergency (LOCA or or LOCA + LOOP)
Emergency (LOCA or LOCA + LOOP)
Emergency (LOCA or LOCA + LOOP)
Emergency {LOCA or LOCA.+ LOOP)
Rev. JS, 07/84
- SYSTEM COl'!PONENT Power Supply Fans (OV-118)
Fan outlet da~pers (Ht>-07841)
Fans (OV-144)
Fan outlet dampers (H0-07842)
Electric heaters (OE-144)
TABU: 9.4-20 CONTROL ROOM & CONTROL STRUCTURE HVAC SYSTEMS SCTS EQUIPMENT ROOM H&V SYSTEMS FAILURE MOOE ANO EFFECT ANALYSIS COMPONENT FAILURE MOOE Total loss of Offsite Power (LOOP) toss of one fan Da111per failure Losa of one fan Dampei: failure Heater failure EFFECT OF FAILURE ON THE SYSTEM None. The systems are redundant and are powered from separate standby diesel generators.
None. The standby fan auto-matically starts.
None. The dampers are designed to fail closed, When the damper fails closed it trips and isolates its associated fan. The standby fan automatically starts.
None. The standby fan auto-matically starts.
None. The dampers are designed to fail closed, When the damper fails closed it trips and isolates its associated fan.
The standby fan autoutlcally starts.
None. The standby fan auto-matically starts on failure *of the running unit as vell aa on low or hiRh roo111 temperature.
FAILURE MODE DETECTION Alam in the control room Alarm in the control room Alann in the control room Alann in the control room Alann in the control room Fan status indicating lights in the control room EFFECT OF FAILURE OF PLANT OPERATION No loss of safety function No loss of safety function No loss of safety function No loss of safety function No loss of safety function No loss of safety function
SSES-FSAR Table Rev. 37 SYSTEM COMPONENT PLANT 0 P E RAT I NG MODE COMPONENT FAILURE MODE Emergency Power supply Emergency (High outside air radiation or Zones I, or isolation signals)
Total loss of power (LOOP)
Emergency (High outside air radiation or Zones I, or isolation signals)
Fans
- 16)
TABLE 9.4-21 CONTROL ROOM CONTROL STRUCTURE HVAC SYSTEMS BATTERY ROOM EXHAUST SYSTEMS FAILURE MODE AND EFFECT ANALYSIS Loss of one fan Fan outlet dampers Isolation dampers (H D-07871
&B)
(H D-07871 Damper failure EFFECT OF FAILURE ON THE SYSTEM None. The systems are redundant and are powered from separate standby diesel generators.
None. The standby fan automatically starts.
None. The dampers are designed to fail closed. When the damper fails closed it trips and isolates its associated fan.
The standby fan automatically starts.
FAILURE MODE DETECTION Alarm in the control room Alarm in the control room Alarm in the control room EFFECT OF FAILURE ON PLANT OPERATION No loss of safety function No loss of safety function No loss of safety function FSAR Rev. 62 Page 1 of 1 offsite (0V-1 tgp1]
I II Ill A1 II Ill A2&B2)
FIGURE 9.4-1-1 REPLACED BY DWG. M-178, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-1-1 REPLACED BY DWG. M-178, SH. 1 FIGURE 9.4-1-1, Rev. 55 AutoCAD Figure 9_4_1_1.doc
FIGURE 9.4-1-2 REPLACED BY DWG. M-178, SH. 2 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-1-2 REPLACED BY DWG. M-178, SH. 2 FIGURE 9.4-1-2, Rev. 55 AutoCAD Figure 9_4_1_2.doc
FIGURE 9.4-2-1 REPLACED BY DWG. VC-178, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-2-1 REPLACED BY DWG. VC-178, SH. 1 FIGURE 9.4-2-1, Rev. 56 AutoCAD Figure 9_4_2_1.doc
FIGURE 9.4-2-2 REPLACED BY DWG. VC-178, SH. 2 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-2-2 REPLACED BY DWG. VC-178, SH. 2 FIGURE 9.4-2-2, Rev. 55 AutoCAD Figure 9_4_2_2.doc
FIGURE 9.4-2-3 REPLACED BY DWG. VC-178, SH. 3 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-2-3 REPLACED BY DWG. VC-178, SH. 3 FIGURE 9.4-2-3, Rev. 55 AutoCAD Figure 9_4_2_3.doc
FIGURE 9.4-2-4 REPLACED BY DWG. VC-178, SH. 4 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-2-4 REPLACED BY DWG. VC-178, SH. 4 FIGURE 9.4-2-4, Rev. 55 AutoCAD Figure 9_4_2_4.doc
FIGURE 9.4-4A REPLACED BY DWG. M-176, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-4A REPLACED BY DWG. M-176, SH. 1 FIGURE 9.4-4A, Rev. 55 AutoCAD Figure 9_4_4A.doc
FIGURE 9.4-4B REPLACED BY DWG. M-2176, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-4B REPLACED BY DWG. M-2176, SH. 1 FIGURE 9.4-4B, Rev. 55 AutoCAD Figure 9_4_4B.doc
FIGURE 9.4-5A REPLACED BY DWG. M-175, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-5A REPLACED BY DWG. M-175, SH. 1 FIGURE 9.4-5A, Rev. 57 AutoCAD Figure 9_4_5A.doc
FIGURE 9.4-5B REPLACED BY DWG. M-175, SH. 2 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-5B REPLACED BY DWG. M-175, SH. 2 FIGURE 9.4-5B, Rev. 55 AutoCAD Figure 9_4_5B.doc
FIGURE 9.4-5C REPLACED BY DWG. M-2175, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-5C REPLACED BY DWG. M-2175, SH. 1 FIGURE 9.4-5C, Rev. 55 AutoCAD Figure 9_4_5C.doc
FIGURE 9.4-6A REPLACED BY DWG. VC-176, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-6A REPLACED BY DWG. VC-176, SH. 1 FIGURE 9.4-6A, Rev. 55 AutoCAD Figure 9_4_6A.doc
FIGURE 9.4-6B REPLACED BY DWG. VC-2176, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-6B REPLACED BY DWG. VC-2176, SH. 1 FIGURE 9.4-6B, Rev. 55 AutoCAD Figure 9_4_6B.doc
FIGURE 9.4-7 REPLACED BY DWG. VC-175, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-7 REPLACED BY DWG. VC-175, SH. 1 FIGURE 9.4-7, Rev. 55 AutoCAD Figure 9_4_7.doc
FIGURE 9.4-8 REPLACED BY DWG. VC-175, SH. 2 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-8 REPLACED BY DWG. VC-175, SH. 2 FIGURE 9.4-8, Rev. 55 AutoCAD Figure 9_4_8.doc
FIGURE 9.4-9 REPLACED BY DWG. VC-175, SH. 3 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-9 REPLACED BY DWG. VC-175, SH. 3 FIGURE 9.4-9, Rev. 55 AutoCAD Figure 9_4_9.doc
FIGURE 9.4-10 REPLACED BY DWG. M-179, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-10 REPLACED BY DWG. M-179, SH. 1 FIGURE 9.4-10, Rev. 55 AutoCAD Figure 9_4_10.doc
FIGURE 9.4-11 REPLACED BY DWG. M-179, SH. 2 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-11 REPLACED BY DWG. M-179, SH. 2 FIGURE 9.4-11, Rev. 48 AutoCAD Figure 9_4_11.doc
FIGURE 9.4-12 REPLACED BY DWG. VC-179, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-12 REPLACED BY DWG. VC-179, SH. 1 FIGURE 9.4-12, Rev. 55 AutoCAD Figure 9_4_12.doc
FIGURE 9.4-13A REPLACED BY DWG. M-174, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-13A REPLACED BY DWG. M-174, SH. 1 FIGURE 9.4-13A, Rev. 55 AutoCAD Figure 9_4_13A.doc
FIGURE 9.4-13B REPLACED BY DWG. M-174, SH. 2 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-13B REPLACED BY DWG. M-174, SH. 2 FIGURE 9.4-13B, Rev. 55 AutoCAD Figure 9_4_13B.doc
FIGURE 9.4-14 REPLACED BY DWG. VC-174, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-14 REPLACED BY DWG. VC-174, SH. 1 FIGURE 9.4-14, Rev. 55 AutoCAD Figure 9_4_14.doc
FIGURE 9.4-15 REPLACED BY DWG. M-177, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-15 REPLACED BY DWG. M-177, SH. 1 FIGURE 9.4-15, Rev. 56 AutoCAD Figure 9_4_15.doc
FIGURE 9.4-16A-1 REPLACED BY DWG. VC-177, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-16A-1 REPLACED BY DWG. VC-177, SH. 1 FIGURE 9.4-16A-1, Rev. 56 AutoCAD Figure 9_4_16A_1.doc
FIGURE 9.4-16A-2 REPLACED BY DWG. VC-177, SH. 2 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-16A-2 REPLACED BY DWG. VC-177, SH. 2 FIGURE 9.4-16A-2, Rev. 56 AutoCAD Figure 9_4_16A_2.doc
SecurityRelatedInformation FigureWithheldUnder10CFR2.390 FIGURE9.417 EXHAUSTREGISTERS REFUELINGFLOOR SUSQUEHANNASTEAMELECTRICSTATION UNITS1&2 FINALSAFETYANALYSISREPORT
FIGURE 9.4-18 REPLACED BY DWG. VC-182, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-18 REPLACED BY DWG. VC-182, SH. 1 FIGURE 9.4-18, Rev. 50 AutoCAD Figure 9_4_18.doc
FIGURE 9.4-18A REPLACED BY DWG. V-182, SH. 8 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-18A REPLACED BY DWG. V-182, SH. 8 FIGURE 9.4-18A, Rev. 50 AutoCAD Figure 9_4_18A.doc
FIGURE 9.4-18B REPLACED BY DWG. V-182, SH. 8A FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-18B REPLACED BY DWG. V-182, SH. 8A FIGURE 9.4-18B, Rev. 50 AutoCAD Figure 9_4_18B.doc
FIGURE 9.4-19 REPLACED BY DWG. M-182, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-19 REPLACED BY DWG. M-182, SH. 1 FIGURE 9.4-19, Rev. 50 AutoCAD Figure 9_4_19.doc
FIGURE 9.4-19A REPLACED BY DWG. M-182, SH. 2 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-19A REPLACED BY DWG. M-182, SH. 2 FIGURE 9.4-19A, Rev. 50 AutoCAD Figure 9_4_19A.doc
FIGURE 9.4-20 REPLACED BY DWG. M-173, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-20 REPLACED BY DWG. M-173, SH. 1 FIGURE 9.4-20, Rev. 48 AutoCAD Figure 9_4_20.doc
FIGURE 9.4-21 REPLACED BY DWG. VC-173, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-21 REPLACED BY DWG. VC-173, SH. 1 FIGURE 9.4-21, Rev. 48 AutoCAD Figure 9_4_21.doc
FIGURE 9.4-22-1 REPLACED BY DWG. V-26-2, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-22-1 REPLACED BY DWG. V-26-2, SH. 1 FIGURE 9.4-22-1, Rev. 49 AutoCAD Figure 9_4_22_1.doc
FIGURE 9.4-22-2 REPLACED BY DWG. V-26-3, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-22-2 REPLACED BY DWG. V-26-3, SH. 1 FIGURE 9.4-22-2, Rev. 49 AutoCAD Figure 9_4_22_2.doc
FIGURE 9.4-22-3 REPLACED BY DWG. V-26-4, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-22-3 REPLACED BY DWG. V-26-4, SH. 1 FIGURE 9.4-22-3, Rev. 49 AutoCAD Figure 9_4_22_3.doc
FIGURE 9.4-22-4 REPLACED BY DWG. V-26-5, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-22-4 REPLACED BY DWG. V-26-5, SH. 1 FIGURE 9.4-22-4, Rev. 49 AutoCAD Figure 9_4_22_4.doc
FIGURE 9.4-22-5 REPLACED BY DWG. V-26-6, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-22-5 REPLACED BY DWG. V-26-6, SH. 1 FIGURE 9.4-22-5, Rev. 49 AutoCAD Figure 9_4_22_5.doc
FIGURE 9.4-22-6 REPLACED BY DWG. V-26-10, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-22-6 REPLACED BY DWG. V-26-10, SH. 1 FIGURE 9.4-22-6, Rev. 49 AutoCAD Figure 9_4_22_6.doc
FIGURE 9.4-22-7 REPLACED BY DWG. V-26-11, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-22-7 REPLACED BY DWG. V-26-11, SH. 1 FIGURE 9.4-22-7, Rev. 49 AutoCAD Figure 9_4_22_7.doc
FIGURE 9.4-22-8 REPLACED BY DWG. V-26-12, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-22-8 REPLACED BY DWG. V-26-12, SH. 1 FIGURE 9.4-22-8, Rev. 49 AutoCAD Figure 9_4_22_8.doc
FIGURE 9.4-22-9 REPLACED BY DWG. V-26-13, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-22-9 REPLACED BY DWG. V-26-13, SH. 1 FIGURE 9.4-22-9, Rev. 49 AutoCAD Figure 9_4_22_9.doc
FIGURE 9.4-22-10 REPLACED BY DWG. V-26-14, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-22-10 REPLACED BY DWG. V-26-14, SH. 1 FIGURE 9.4-22-10, Rev. 49 AutoCAD Figure 9_4_22_10.doc
FIGURE 9.4-22-11 REPLACED BY DWG. V-26-15, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-22-11 REPLACED BY DWG. V-26-15, SH. 1 FIGURE 9.4-22-11, Rev. 49 AutoCAD Figure 9_4_22_11.doc
FIGURE 9.4-22-12 REPLACED BY DWG. V-34-2, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-22-12 REPLACED BY DWG. V-34-2, SH. 1 FIGURE 9.4-22-12, Rev. 49 AutoCAD Figure 9_4_22_12.doc
FIGURE 9.4-22-13 REPLACED BY DWG. V-34-3, SH. 1 FSAR REV. 65 SUSQUEHANNA STEAM ELECTRIC STATION UNITS 1 & 2 FINAL SAFETY ANALYSIS REPORT FIGURE 9.4-22-13 REPLACED BY DWG. V-34-3, SH. 1 FIGURE 9.4-22-13, Rev. 49 AutoCAD Figure 9_4_22_13.doc