Text

Suppl to Amend#8 to Gibbssar,The Gibbs & Hill,Inc Standard Safety Analysis Rept.
	ML19308A189
Person / Time
Site:	05000584
Issue date:	12/27/1978
From:	Prietto R; GIBBS & HILL, INC. (SUBS. OF DRAVO CORP.)
To:	;
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ML19308A188	List: ML19308A187; ML19308A189;
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Gibbs S Hill,Inc.

E NGINE E RS DESIGNERS CONS'RUCTORS DIRECT DIAL E XT E N SION

2i2i TeO- 5167 Gentlemen: u #C&rjtag Enclosed find copy #

o {' of Amendment p to GIBBSSAR, the Gibbs & Ilill, Inc. Standard Safety Analysis Report. Please enter this amendment and remove superseded pages. Please return the enclosed postcard acknowledging receipt.

Very truly yours, GIBBS & IIILL , Inc.

, {I ht I.

Robert Prieto Assistant GIBBSSAR Project Manager d5 ? ~

, ,no

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(0 0

b RP:racu 393 SEVENTH AV E N U E NEW YORK. N . Y. 10001 C AB LE: GIB BSHILL, NE W YORK

GIBBSSAR AMENDMENT 8 SUPPLEMENT INSTRUCTION SHEET The following instructional information and checklist is being provided to insert Amendment 8 to GIBBSSAR, the Gibbs & Hill Standard Safety Analysis Report.

Since in most cases the original contains information printed on both sides of paper, a new sheet is being furnished to replace the sheets containing superseded material. As a result, the front or back of a sheet may contain information that is merely reprinted rather than changed.

Amendment 8, previously transmitted to you, indicated certain pages would be shipped under separate cover. These pages are included in this supplement. The instructional information contained in the Amend-ment 8 instruction sheet is repeated herein for your convenience. This information has been modified slightly.

Discard the old sheets and insert the new sheets as listed below:

Pcplace the question status table with the new one contained herein.

e Remove Insert (Front /Back)

Front /Back)

T3.11-3 Sh. 1/T3.ll-3 Sh. 2 T3.ll-3 Sh. 1/-

T3.ll-4/- T3.ll-4 Sh. 1/T3.ll-4 Sh. 2 6.5-1/6.5-2 6.5-1/6.5-2 6.5-2a/-

T6.5-7/- T6.5-7/-

9.4-1/9/4-la 9.4-1/9.4-2 9.4-2/9.4-3 9.4-3/9.4-3a 9.4-4/- 9.4-4/9.4-5 9.4-5/9.4-6 9.4-6/9.4-6a 9.4-6a/9.4-7 9.4-6b/9.4-7 9.4-7a/9.4-8 9.4-7a/9.4-8 T9.4-3/- T9.4-3/-

9.5-1/9.5-2 9.5-1/9.5-2 9.5-3/9.5-4 9.5-3/9.5-4 9.5-5/9.5-6 9.5-5/9.5-6 9.5-7/9.5-8 9.5-7/9.5-8 9.5-9/9.5-10 9.5-9/9.5-10 9.5-11/9.5-12 9.5-11/9.5-12 9.5-13/9.5-14 9.5-13/9.5-14 9.5-15/9.5-16 9.5-15/9.5-16 9.5-17/9.5-18 9.5-17/9.5-18 9.5-19/9.5-20 9.5-19/9.5-20 9.5-21/9.5-22 9.5-21/9.5-22 9.5-23/9.5-24 9.5-23/9.5-23a 9.5-23b/9.5-23c 9.5-23d/9.5-23e 9.5-23f/9.5-23g 9.5-23h/9.5-23i 9.5-23j/9.5-23k 9.5-231/9.5-24 T9.5-7 Sh. 1/T9.5-7 Sh. 2 T9.5-8/-

0311-23/-

FIGURES 9.5-1 9.5-1A 9.5-1B

TABLE 18.0-1 NRC QUESTION STATUS Response Transmitted Ouestion Number via AmeI)dment 005.1 6 005.2 6 005.3 6 005.4 6 005.5 This question to be withdrawn per meeting with NRC on 11-07-78 010.1 2 010.2 2 010.3 2 010.4 2 010.5 2 010.6 2 010.7 2 010.8 2 010.9 2 010.10 2 010.11 2 010.12 2 010.13 6 010.13A 8 010.14 6 010.15 6 010.16 8 010.17 6 010.18 6 010.19 6 010.20 6 010.21 6 010.22 6 010.23 6 010.24 6 010.25 6 010.26 6 010.27

~ '

6 010.28 6 010.29 6 010.30 6 010.31 6 010.32 6 010.33 6 010.34 7 Amendment 8

TABLE 18.0-1 (Continued)

NFC QUESTIOti STATUS Response Transmitted Question _ Number via Amendment 010.35 6 010.36 6 010.37 6 010.38 6 010.39 none received 010.40 6 010.41 6 010.42 none received 010.43 6 010.44 6 010.45 6 010.46 6 010.47 6 010.48 6 010.49 6 010.50 6 010.51 6 010.52 6 010.53 6 010.54 6 010.55 6 010.56 6 010.57 6 010.58 6 010.59 7 010.60 6 010.61 6 010.62 6 010.63 6 010.64 8 010.65 6 010.66 7 010.67 6 010.68 6 010.69 ~

6 010.70 6 010.71 6 010.72 6 010.73 6 010.74 6 010.75 6 022.1 2 022.2 2, 8 Amendment 8

TABLE 18.0-1 (Continued)

NFC QUSSTION STATUS Response Transmitted guestion Number via Amendment 022.3 2 022.4 2 022.5 2, 6 022.6 6 022.7 7 022.6- 6 022.9 7, 8 022.10 6 022.11 6 022.12 6 022.13 6 022.14 6 022.15 6 022.16 6 022.17 6 022.18 6 022.19 6 022.20 6 022.21 6 022.22 6 022.23 7 032.1 2 032.2 2 032.3 2 032.4 2 032.5 2 032.6 2 032.7 2 111.1 2 111.2 2 111.3 2 111.4 '

_e 111.5 4 111.6 4 111.7 2 111.8 2 111.9 2 111.10 2 111.11 2 111.12 4 111.13 4 111.14 2 111.15 2 Amendment 8

TABLE 18.0-1 (Continued)

IGC QUESTION STATUS Response Transmitted Ouestion Number

_ via Amendment 111.16 2 111.17 2 111.18 2 111.19 4 111.20 4, 7 111.21 5 111.22 2 111.23 2 111.24 2 111.25 4 111.26 2 111.27 2 111.28 2 111.29 4 111.30 4 111.31 4 111.32 4 111.33 4 111.34 4 111.35 4 111.36 4 111.37 4 111.38 4 111.39 4 111.40 7 111.41 7 111.42 7 111.43 8 111.44 7 111.45 7 111.46 7 111.47 -

7 111.48 7 111.49 7 111.50 7 111.51 -

7 111.52 7 111.53 7 111.54 7 121.1 2 121.2 2 121.3 5 121.4 5 Amendment 8

TABLE 18.0-1 (Continued)

NRC QUESTION STATUS Response Transmitted Que_rtion Nu _mbel via Amendment 121.5 5 122.1 4 122.2 4 122.3 5 122.4 4 122.5 4 122.6 5 131.1 2 131.2 4 131.3 2 General Comments A 6 General Comments B 5 131.1 5 131.2 5 131.3 5 131.4 5 131.5 5 131.6 5 131.7 5 131.8 5 131.9 5 131.10 5 131.11 6 131.12 5 131.13 5 131.14 5 131.15 'c 131,16 S 131.17 5 131.18 5 131.19 5 131.20 5 131.21 5 131.22 5 131.23 5 131.24 5 131.25 5 131.26 5 131.27 5 131.28 5 131.29 5 131.30 5 131.31 5 Amendment 8

TABLE 18.0-1 (Continued)

NRC QUESTION STATUS Response Transmitted Ouestion Number via Amendment 131.32 6 131.33 5 131.34 6 131.35 5 131.36 5 131.37 7 131.38 5 131.39 5 131.40 5 131.41 5 131.42 5 131.43 5 131.44 5 131.45 5 131.46 5 131.47 5 131.48 5 131.49 5 131.50 5 131.51 5 131.52 8 131.53 5 131.54 5 131.55 5 131.56 8 131.57 8 131.58 8 131.59 8 131.60 8 131.61 8 131.62 8 131.63 8 131.64 8 131.65 8 131.66 8 131.67 8 131.68 8 131.69 8 131.70 8 131.71 8 131.72 8 131.73 8 131.74 8 Amendment 8

TABLE 18.0-1 (Continued)

NRC QUESTION STATUS Response Transmitted Ouestion Number via Amendment 131.75 8 131.76 8 212.1 4 212.2 5 212.3 5 212.4 5 212.5 4 212.6 5 212.7 5 212.8 4 212.9 4 212.10 4 and 5 212.11 5 212.12 5 212.13 4 212.14 5 212.15 4 212.16 4 and 5 212.17 4 212.18 4 212.19 5 212.20 4 212.21 4 212.22 5 212.23 5 212.24 5 212.25 5 and 7 212.26 4 212.27 4 212.28 4 212.29 7 212.30 7 212.31 7 212.32 7 212.33 ~

7 212.34 7 212.35 8 212.36 7 212.37 7 212.38 7 221.1 7 222.1 8 222.2 8 Amendment 8

TABLE 18.0-1 (Continued)

NRC QUESTION STATUS Response Transmitted Qgstion Number via Amendment 222.3 8 222.4 Response to be submitted upon completien of analysis 222.5 8 222.6 8 311.1 2 311.2 2 311.3 2 311.4 2 311.5 2 311.6 2 311.7 2 311.8 2 311.9 3 311.10 3 311.11 2 311.1 6 311.2 7 311.3 5 311.4 5 311.5 6 311.6 5 311.7 5 311.8 6 311.19 8 311.20 8 311.21 8 320.1 2 320.2 2 321.1 6 321.2 6 321.3 6 321.4 6 321.5 _ 6 321.6 6 321.7 6 321.8 6 321.9 6 321.10 6 321.11 6 321.12 6 321.13 6 Amendment 8

TABLE 18.0-1 (Continued)

NRC QUESTION STATUS Response Transmitted Ouestion Number via Amendment 321.14 6 321.15 6 321.16 8 321.17 8 321.18 8 321.19 8 321.20 8 321.21 8 321.22 8 321.23 8 321.24 8 321.25 8 331.1 2 331.2 2 331.3 2 331.4 2 331.5 2,6 331.6 2 331.7 2 331.8 6 331.9 7 331.10 6 331.11 6 331.12 6 331.13 7 371.1 2 371.2 2 421.0 2 423.1 2 423.2 2 432.0 8 Amendment 8

GIBBSSAR 6.5 Fission Product Pemoval and Control Systems 6.5.1 Engineered Safety Feature Filter Systems The atmosphere cleanup systems are summarized below classified as ESF filter systems and are required to perform safety-related f unctions following a DBA.

No. Filtration System Function Units Redundancy

1. Control Room a) Emergency 2 100%

Ventilation pressuri-System zation b) Emergency 2 100%

filtration

2. Primary Plant a) Fuel hand- 2 100%

Ventilation ling area System 8

The filter units are shown on Figures 9.4-2, 9.4-17, and are discussed in Sections 9.4 and 9.6.

6.5.1.1 Design Bases As required in General Design Criterion 19 of Appendix A to 10 CFR Part 50 the filtration units are provided to ensure a safe environment and to permit access and occupancy of the control room during and after a DBA. As required in General Design Criterion 60 and 61 of Appendix A to 10 CFR Part 50, the primary plant ventilation system exhaust units (fuel-handling building 8 exhaust units) are provided to reduce the amount of radioactive material released to the environment following a DBA.

6.5-1 Amendment 8

GISBSSAR trains discussed above comply with the construction and efficiency requirements of NRC Pegulatory Guide 1.52, ERDA 76-21, as well as ANSI N509 and N510 as stated in Tables 6.5-1, 9.4-4 8 and 9.4-5.

6.5.1.2 System Design For each ESF atmosphere cleanup system, the design features and fission product-removal capability are in compliance with the six positions detailed in NRC Regulatory Guide 1.52 as shown in Table 6.5-1. Each design item in which exception is taken is justified. The components comprising the ESF atmosphere cleanup units are mist eliminator, heater, prefilter, two HEPA filters, lodine adsorber, fan, isolation valves, and related instrumentation. Figure 6.5-1 illustrates a typical layout for an ESF atmosphere cleanup unit.

6.5.1.3 Design Evaluation The ESF atmosphere cleanup systers conform to the criteria established in the Regulatory Positions of NFC Regulatory Guide 1.52 as shown in Table 6.5-1 Anticipated efficiencies of filters in new condition and data for the iodine adsorbers are presended in Tables 9.4-4 and 9.4-5, respectively.

Filters are designed to seismic Category I. Redundancy of equipment and power supplies enables the systems to sustain a single active failure without loss of f unction, during LOCA, loss of of f site power ar.d normal plant operation.

Ductwork is of the zero leakage type and designed to seismic Category I. The systems are protected from pipe whip damage.

6.5-2a Amendment 8

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The sizing of filters, fans and associated ducting is based upon required airflow rates to perform the stated ventilation f unction.

The pressurization filter trains design basis is to provide a 1/8 inch over pressure in the control room envelope during a LOCA. The fans and ducting are sized to the maximum leak rate shown in Table 6.4-3 and required according to ANSI N-509 requirements. The filtration train design is based upon the nearest multiple of HEPA filter elenent cross section which will catisfy this flow requirement. A single element HEPA filter cross section is sufficient (see Table 6.4-3) . The HEPA filters and iodine absorbers design bases are discussed below.

The emergency filtration units design basis is to provide emergency filtration of 10 percent of the recirculated air within the control room envelope. The fans and ducts design basis is to satisfy this requirement in accordance with the requirements of ANSI N-509. The filtration train design is based upon the nearest multiple of HEPA filter element cross section which will satisfy the flow requirement. A four element HEPA filter cross section is sufficient per Section 9.4.1. For mode of operation of both the pressurization filter units and the emergency filter units as well as duct and fan criteria.

Figures 9.4-1' and 9.4-16.

See Section 9.4.1 and For a discussion of HEPA and iodine lll adsorption filters see below.

The primary plant ventilation exhaust units are designed to service the fuel handling building during refueling or a f uel 8 handling accident, or both. In addition, these units being of a standardized modular design, per 14th ERDA air cleaning conference paper 761-783, are also designed to maintain a negative pressure throughout the controlled acceas area during a loss-of-offsite power or a LOCA. Tbn modular filter train and associated fans and ducting flowrate design is based upon a cross section of HEPA filter elements which will allow a completely factory assembled filtration unit to be shipped by truck or railcar without any special considerations. A four by three HEPA clement bank cross section is within this limit. The flow requirements of the fuel handling area during a fuel handling accident is less than the combined capability of the two trains, thus a simple failure will only reduce flow and a negative pressure is still maintained. Operator action will reduce supply air. For specific discussion regarding fans and ducts design bases beyond the requirements of ANSI N509-1976 as well as mode of operation see sections 9.4.2 and 9.4.3 and figures 9.4-6 and 9.4-7. REPA filters and iodine adsorbers used in the filter 6.5-2 Amendment 8

GIBBSSAR 9.4 Air-Conditioning, Hea_ ting, Cooling, and Ventilation Systems 9.4.1 Control Room Envelope 9.4.1.1 Design Bases The control room envelope heating, ventilating, and air-conditioning (IIVAC) system is designed to maintain suitable and safe ambient conditions for operating equipment and personnel in the following areas during normal plant operation and following a DBA:

a. Main console area

b. Rear console area

c. Computer room

d. Computer storage room

e. Vital equipment room

f. shift supervisor office and file room

g. Permanent record storage room

h. Kitchen and dining area

1. Emergency provisions and equipment storage

1. Men's lockers and lavatory

k. Women's lockers and lavatory

1. Observation area

m. Control room air-handling equipment rooms These areas are located in the auxiliary building as stated in Section 6.4.1. Ambient conditions are maintained at 75 F 15 F g dry bulb and 50 percent 110-percent relative h umidity. The equipment room, however, is at 90 F 15 F which is within the environmental requirements for equipment stated is section 3.11.

Other system design conditions are presented in Tables 9.4-1, 9,4-2, and 9.4-7.

9. 4- 1 Amendment 8

GIBBSSAR g

The system is provided with sufficient redundancy in (quipment and power supplies, as described in the following paragraphs, to enable the system to sustain a single failure of an active component without loss of function.

a. The system is equipped with two 100-percent-capacity air-handling units, each powered from an independent Class IE 8 electrical bus. Each air-handling unit is cooled with chilled water from an independent nuclear safety chilled water system,

b. The emergency filtration units, pressurization units, and exhaust fans for the kitchen, dining room, lockers, and toilet areas are redundant. showers,l 5

c. The redundant units, dampers, and fans are powered from independent Class 1E electrical buses. (See Section 8.3. for a description of the Class 1E electrical buses.)

d. Redundant dampers 5, 6, 29, 30, 31, and 32, and intake air dampers 1 and 2, shown in Figure 9.4-16, are available for 8 system isolation.

e. The exhaust fans are equipped with icolation dampers 29, 30, 31, and 32 (Figures 9.4-1 and 9.4-16) .

a W

f. Dampers 15, 18, 19 and 22 are provided for the isolation of the emergency filtration units.

g. All control valves and dampers are equipped with manual operators at accessible locations to facilitate operation in the event of power or instrument air failures, or both.

The system components and duct work are of seismic Category I and ANSI Safety Class 3 design, to assure system availability for y safe shutdown of the reactor following a DBA.

Isolation valves and dampers are set to fail in a safe position, such that the system is operable in the emergency pressurization g mode.

Radiation protection (see Sections 12.3 and 6.4. 2.5) is provided to permit occupancy of the control room during nornal plant 9.4-2 Amendment 8

GIBBSSAR operation and following a DBA, so that personnel are not exposed to radiation in excess of 5-rem whole body, or its equivalent, to any part of the body for the duration of the accident (See GDC 19 of 10CFR Part 50, Appendix A) .

Continuous surveillance of activity levels is provided by the radiation monitoring system (see subsection 11.5 for design criteria) in the control room. Activity levels are monitored continuously, indicated and recorded in the control room, and high levels are annunciated on the main control board.

These radiation detectors are located in the plant's ventilation air discharge duct, control room air intake duct and within the control room envelope.

The control room ventilation system will automatically switch to the emergency pressurization mode as described in 8 subsection 9. 4.1.2 upon receipt of any radiation detector signal, a safety injection signal or an electrical blackout.

The pressurization mode is the overriding mode in the control room ventilation system and cannot be removed without operator action.

Fedundant detectors are installed in accordance with thel 1 recommendations of Regulatory Guides 1.78 and 1.95, in each of the fresh-air inlet ducts of the control room HVAC system for detection of toxic gases and smoke. The isolation dampers close within 4 seconds of a detector signal, and the control room HVAC system automatically switches to the emergency recirculation g mode, as described in subsection 9.4.1.2. A signal from either detector or a detector failure automatically switches the control room HVAC system to the emergency recirculation mode unless the system is already in the emergency pressurization mode. The control room detectors are seismically qualified to the SSE conditions.

l1 To detect an accidental release of toxic gases stored at the site in single container quantities less than 100 lb, remote detectors are provided in accordance with regulatory position 3 of Regulatory Guide 1.78. These detectors alarm in the control room on high gas concentration, at which time the control room HVAC system is switched automatically to the emergency recirculation mode.

9.4-3 Amendment 8

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9.4.1.2 System Description The control room HVAC system is designed to serve the areas listed in subsection 9.4.1.1 and is designed to remove all heat generated by the equipment, computers, lighting, personnel, and to provide a safe operating condition for the personnel and equipment. The system also removes particulate matter and other contaminants from the ~ control room air space during and post DBA operation. During all modes of operation, the free volume of the areas served by the control room HVAC system in approximately 230,000 ft3 Two 100 percent-capacity modular air-handling units, one of which is on standby, provide the required cool air.

O 9.4-3a Amendment 8

GIBBSSAR Each modular air-handling package contains a roughing filter, fan, heating element, chilled water, cooling coil, humidity control equipment, and associated instrumentation and controls.

Each cooling coil is supplied from the nuclear safety chilled water system.

During normal operation the air is recirculated through the 8 air-handling unit at all times with about 9-percent outdoor air added to provide for oxygen depletion, odor control, leakage, and the toilet exhaust fans. Approximately 2700 ft3/ min of outside air is introduced into the control room HVAC system which has a total capacity of 30400 ft3/ min.

Redundant emergency filtration units are provided for use following a high radiation signal, hazardous gas signal, or a LOCA. The unit is comprised of mist eliminators, heaters, roughing and HEPA filters, iodine absorber, and a booster fan.

See Figure 9.4-2. l 6 Exhaust air from the lavatory and kitchen areas is discharged directly to the atmosphere by one of the two 100-percent-capacity toilet exhaust fans.

The control room envelope is pressurized at an overpressure of approximately 1/8-inch wg to prevent infiltration of unfiltered and unmonitored air and to account for leakages, as specified in subsection 6.4.2.3. This overpressure is maintained by motor operated variable vane centrifugal fans (9 and 10) during normal operation and emergency ventilation. Overpressure during the emergency pressurization mode is accomplished by introducing 8 500 ft3/ min of filtered air into the control room via centrifugal fans 5 or 6. This air is supplied through a 100-percent-redundant air-cleanup system consisting of a fan, mist eliminator, heater, roughing filter, two HEPA filters, and an iodine adsorber.

9.4-4 Amendment 8

GIBBSSAR g

Operation of the control room HVAC system is comprised of the following modes:

a. Normal operation

b. Emergency recirculation 0

c. Emergency pressurization

d. Emergency Ventilation The four modes of operation are shown in Figure 9.4-16. The lineup of the system components for the preceding modes is shown in Table 9.4-3.

During normal operation assuming train B is on standby the toilet exhaust fan 7 is operating and its associated dampers 29 and 31 are open. The emergency filtration and pressurization units are isolated by closing dampers 5, 13, 15, and 19 and bypass dampers 1 and 7 are opened. Fresh air is drawn in through the outside air intake structure and discharged into the air intake plenum. The operational air-handling unit (train A) extracts air from the plenum, cools it and distributes it via ductwork to the 8

control room envelope. Ninety-one percent of the exhaust air from the control room is routed to the intake plenum to be recirculated. The renaining portion, 9 percent of the total supply to the control room envelope, is transported by a separate ductwork and is exhausted to the outside atmosphere via the toilet exhaust fan.

9.4-5 Amendment 8

GIBBSSAR The control room HVAC system automatically switches to emergency recirculation mode when any one of the conditions outlined in subsection 9.4.1.3 are detected. The system will not switch automatically to this mode if the pressurization mode is in operation.

The emergency recirculation mode provides complete isolation of the control room envelope. This mode is initiated automatically upon:

a. Smode detection signal

b. Toxic gas detection signal The procedure is as follows:

a. Both exhaust fans (7 or 8) and intake fans (9 or 10) stop,

b. The makeup air intake dampers 1, 2, 7 and 8 and exhaust dampers 29, 30, or 31, 32 close. All other exterior isolation dampers that were closed during normal operation remain closed (5, 6, 13, 14).

8

c. Isolation dampers 15, 18, 19 and 22 of the emergency filtration units and bypass dampers 16, 25, 27 and 28 are positioned so that between 3,500 and 4,000 f t3/ min of the recirculating air flow is directed through each filtration unit and booster fans,

d. The emergency booster fans 3 and 4 start and one system is deactivated manually.

4,000 ft3/ min of the control room air is filtered through the emergency filtration units during the recirculation process to maintain the levels of contaminants within safe limits.

The emergency pressurization mode is initiated automatically from any mode of operation that the system is in, upon the detection of the following signals.

a) Electric control power failure (blackout) b} Control room high-radiation c) Stack high radiation 9.4-6 Amendment 8

GIBBSSAR O

d) Safety injection (automatic or manual)

The procedure for emergency pressurization is as follows:

a) Isolation dampers 5, 6, 13 and 14 of the emergency pressurization units are positioned such that between 0 and 500 ft3/ min of outside air flow is directed through the filters and booster fans to provide the required pressurization inside the control room envelope.

b) The emergency booster fans 5 and 6 start and one system is 8 deactivated manually. Air flow is modulated between 0 and 500 ft3/ min to provide the required pressurization inside the control room envelope.

c) All other fans and dampers remain in the same position as emergency recirculation.

Following the automatic initiation of the emergency pressurization mode the operator can regain manual control over the system from the control room ventilation panels. By properly lining up the system components, the operator can switch to the emergency recirculation mode emergency ventilation or back to normal operation. h The emergency ventilation mode replenishes the oxygen content and removes odors in the control room atmosphere during the emergency recirculation mode. For brief intervals, intake dampers 1, 11, 8 or 2 and 12 (depending on which train is operating) are opened and booster fans (9 or 10) operating to allow filtered 2700 ft3/ min of outside air to enter the control room complex.

The toilet exhaust fan also operates at this time and its respective dampers are opened.

9.4.1.3 Safety Evaluation The control room atmosphere clean up units (integrated into the HVAC system design) conform to the criteria established in NRC Regulatory Guide 1.52, which is shown in Table 6.5-1.

The control room HVAC system is provided with instrumentation and controls which continuously monitor system performance. In addition, area radiation and fire detection monitors are provided to ensure safe operational conditions for equipment and personnel during all modes of operation.

9.4-6a Amendment 8

GIBBSSAR Ionization dete: tors are located in the fresh air intake ducts to the control room to detect smoke in the incoming air. If smoke is detected, the inlet and outlet control room air duct dampers automatically close in approximately 4 seconds, and air is 9.4-6b Amendment 8

GIBBSSAR O

recirculated in the control room via the emergency recirculation l 'i mode.

No purging is required to remove contaminants from the control room. Any contaminants that have entered the control room prior to closure of the dampers are removed by the energency filtration unit.

Audible and visual alarms are provided in the control room to alert the operator in the event of systen. malfunction or unsafe conditions.

The control room HVAC system is designed to automatically switch to the emergency pressurization mode described inl 2 subsection 9.4.1.2 if either the electric control power fails (blackout) or upon receipt of a control room high-radiation signal or stack high-radiation signal or safety injection signal. Upon receipt of toxic gas or smoke detection signal the system automatically switches to the emergency recirculation mode as described in section 9.4.12. In addition, 8 the system can be switched manually to any mode of operation.

The radiation signals originate from multiple radiation detectore of the type discussed in Section 11.5 and subsection 12.3.4. The radiation sensors are located in t he cont rol room ventilation inta ke duct and the control room envelope as well as the lll ventilation air discharge duct.

Two redundant toxic gas detectors are located in the outside air intake duct. Radiation detectora are positioned downstream of the isolation dampers (19 and 22) of the emergency filtration l 8 units, with branch connections to the outside air intake duct.

The iodine adsorbers construction and ef ficiencies comply with NRC Regulatory Guide 1.52. Additional data concerning iodine adsorbers is presented in Table 9.4-5.

Anticipated efficiencies of filters in new condition is in accordance with Table 9.4-4.

An analysis of postaccident dose levels in the control room is presented in Section 15.6.5.3. Inhalation doses during normal operation are discussed in Section 12.4.

Sufficient redundancy in equipment and power supplies enables the system to sustain a single active failure without loss of

9. 4- 7 Amendment 8

GIBBSSAR function. The emergency pressurization and recirculation filter trains, plus supply and exhaust fans and associated dampers, are 1 9.4-7a Amendment 1

GISBSCT.R O

completely redundant. Two parallel air-handling units are used to provide 100-percent (one-unit) standby feature. The tailure mode and effect analysis for the control room HVAC system is 8 shown in Table 9.4-6.

The probability of an electrical fire in the control room is low because of the flame-retardant cable insulation with self-extinguishing and nonpropagating characteristics. If, however, a fire occurs, fire dampers automatically isolate the affected area to prevent spreading of fire and smoke and to shut of f the oxygen supply (see Section 9.5.1) . After extinguishing the fire, the area is reconnected to the ventilation system and 8 smoke and other conbustion products are exhausted either by the use of portable fans or via the ventilation system exhaust.

Alarms in the control room alert the operator to any system malfunction so that he can manually actuate the necessary standby units. The maximum operational temperature limit for control room instrumentation is 120 F. This temperature is not reached during the short periods of system malfunction prior to the actuation of the standby units.

The control room HVAC equipment is located in a Seismic Category I structure adjacent to, above, and below the control room at elevation 130 feet, 6 inches, as shown on Figure 1.2-5. lll One air-intake louver is located on the wall of this structure. 8 The second air intake louver is located on the roof at elevation 180'-6" (there is one intake for each train) . The control room HVAC system is Seismic Category I and ANSI Safety Class 3. The intake ducts and louvers are located in structures designed to withstand the tornado loads and tornado-related missiles described in subsection 3.3.2.

All equipment required for operation during a loss of offsite power or following a LOCA is powered from the redundant Class IE electrical buses.

9.4.1.4 Inspection and Testing Requirements Shop inspection and testing are performed for all equipment, heating and cooling coils, and controls.

The system is initially tested and adjusted for proper flow paths, flow capacities, heating and cooling capacities, mechanical operability, and filter efficiency.

9. 4- 8 Amendment 8

GIBBSSAR TABLE 9.4-3 EQUIPMENT LINEUP FOR CONTROL ROOM AIR-CONDITIONING SYSTEM MODES OF OPERATION Dampers Dampers Dampers Mode Ope n

Fan On* Closed Modulated **

Normal 1, 7, 21 7, 1, 9 5, 11, 13, 15 3 Operation 29, 31 19, 25, 27, 2, 4, 6, 8, 12, 14, 16, 18, 22 24, 28, 30, 32 Emergency 15, 19, 1, 3 1,3,5,7, 11, 25 Recirculation 21, 27 13, 29, 31, 2, 4, 6, 8, 12, 14, 16, 18, 22 24, 28, 30, 32 Emergency 5, 15 1, 3, 5 1, 3, 7, 11, 29 13, 25 8 Pressurization 19, 21, 31, 2, 4, 6, 8, 27 12, 14, 16, 18 22, 24, 28, 30 32 Emergency 1, 11, 1, 3, 7 5, 7, 13, 27, 3, 25 Ventilation 15, 19, 9 2, 4, 6, 8, 12, 21, 29, 14, 16, 18, 22, 31 24, 28, 30, 32 SEE subsection 9.4.1.2 for overpressure requirements

Components normally function NOTE: Fan inlet flow control dampers 9, 10, 17, 20 compensate for filter conditions.

Amendment 8

GIBBSSAP 9.5 other Augiliary Systems 9.5.1 Fire Protection The overall fire protection program was developed utilizing the defense in depth concept. The fire protection system deals with fire prevention, fire detection and suppression, and fire extinguishing techniques. The fire protection system is designed to balance these factors. These factors are applied to construction methods, selection of materia ls , plant general arrangement, and evaluation of fire effects. Further considerations, such as employee safety, effects on the environment and property protecti.A have also been incorporated in the overall fire protection program.

The fire protection program applies to equipment, procedures and plant personnel utilized in effecting fire protection and prevention as it relates to plant design. The fire hazards evaluation quantifies potential fire hazards throughout the plant is terms of combustible heat release loading. Subsequently, the fire protection and detection systems are designed based on this heat release loading and the nature of the combustible material 8 in the area, as well as on the criticality of equipment and comb ustibles in adjacent fire areas. A summary of this information is presented in tabular form and provided in Table (later) .

The Gibbs 6 Hill, Inc. Standard Nuclear Power Plant fire protection program is in general compliance with the criteria provided by Standard Review Plan 9.5.1 and NRC Branch Technical Position ASB-9.5-1, Pev. 2.

An overall fire protection system description is provided in sections 9.5.1.1 through 9.5.1. 5. Section 9.5.1.6 provides the details which indicate the extent of conformance with Standard Peview Plan 9.5.1 and NRC Branch Technical Position ASB 9.5-1, Rev. 2.

9.5.1.1a Design Bases The following are design functions of the fire protection system:

a. To minimize the possibilities of fire starting in any area of the plant

b. To provide quick-acting fire detection and suppression systems for use in the event of a fire.

9.5-1 Amendment 8

GIBBSSAF i

O

c. To minimize the possibility of personnel injury and equi pment damage.

d. To minimize the effects of fire to essential safet y-related components of the plant.

9.5.1.1b Identification of Fires The overall fire protection is based on evaluation of potentini fire hazards which can affect the safety-related s t ruc ture s.

Fires that can directly or indirectly affect emergency safety features (ESP) equipment and structures are postulated to occur at the location of stored combustible material and are directly related to the quantity of combustible material.

Safety related systems, structures, components and equipment are separated from each other either by 3-hour fire ba rrie rs (with openings having protection consistent with this rating) , or by equivalent and adequate spatial clearance. Fire areas are 8

provided based on the amount of combustible material present and provide adequate isolation of redundant safety related systems and components.

9.5.1.1c Fire Characteristics lll The intensity of fire depends on the material and combustibilit y of the burning surface area.

Activated charcoal has an ignition temperature of approximately 340 C. When used in an adsorber filter, activated charcoal is encased in a steel or sheet metal enclosure. The incidence of fire with normal airflow is considered unlikely. Combustion products are mainly carbon, carbon dioxide, and carbon monoxide.

Charcoal fires in relatively still air burn slowly with a low spreading intensity and little smoke.

Oil fires burn rapidly with high intensity and smoke. Fires involving hydraulic oils are kept to a minimum by use of high-flashpoint fluids and where possible synthetic hydraulic oils. Lubricating and diesel fuel oil fires are surface burning fires, which produce smoke and unburned fumes.

9.5-2 Amendment 8

GIBBSSAR

9. 5.1.1d Seismic Design To ensure that failure of any portion of the fire protection system does not damage safety related seismic equipment required for safe plant shutdown, the fireCategory protection I

system piping is designed and supported as seismic Category I for the containment building and those areas of the Auxiliary Building where its failure could damage safety related or safe shutdown equipment.

9.5.1.1e Applicable Codes and Standards The codes and standards considered and utilized in the design of the fire protection system are as follows:

National _ Fire Protection Association Codes and Standards NFPA 13-1975, " Portable Fire Extinguishers , Installation, Maintenance, and Use." 8 NFPA 11-1975, " Foam Extinguishing Systems. "

NFPA 11A-1970, "High Expansion Foam Systems."

11FPA 11B-1974, " Synthetic Foam and Combined Agent Systems."

NFPA 12A-1973, "Halon 1301 Systems."

NFPA 12B-1973, "Halon 1211 Systems."

NFPA 13-1976, " Sprinkler Systems."

NFPA 14-1974, " Standpipe and Hose Systems."

NFPA 15- 1973, " Water Spray Fixed Systems. "

NFPA 17 " Dry Chemical Systems," -

NFPA 20-1973, " Centrifugal Fire Pumps."

NFPA 22 " Water Tanks for Private Fire Protection."

NFPA 24-1973, "Outside' Protection."

NFPA 26-1958, " Supervision of Valves."

9.5-3 Amendment 8

GIBbSSAF O

NFPA 27-1975, " Private Fire Brigade."

NFPA 30-1973h " Flammable Combustible Liquids Code."

NFPA SOA " Gaseous Hydrogen Systems."

NFPA 51B-1976 " Cutting & Welding Processes. "

NFPA 69-1973, " Explosion Drevention Systems. "

NFPA 70-1975, " National Electrical Code."

NFPA 72D-1975, " Proprietary Protective Signaling Systems."

NFPA 72E-1974, " Automatic Fire Detectors."

NFPA 80-1975, " Fire Doors and Windows."

NFPA 92M-1972, " Waterproofing and Draining of Floors."

NFPA 197-1966, " Initial Fire Attack, Training, Standard On."

NFPA 204-1968, " Smoke and Heat Venting Guide. "

NFPA 220-1975, " Types of Euilding Construction. "

O NFPA 251- 1975, " Fire Tests , Buildir. _ "onstruction and Materials."

NFPA 259-1976, " Test Method for Forentential Heat of Building Materials."

NFPA 802-1974, " Recommended Fire Protection Practice for Nuclear Feactors."

U82 Nuclear Regulatory CommissioD_?ccupen e NUREG-0050, "Pecommendations Pelatta to Brc"no Ferry Fire,"

Feport by Special Peview Group, Februar y 1976.

WASH-1400 (N UREG-75 /014) , "Peactor Se .aty St 'dy - An Assessment of Accident Risks in U. S. Commercial Nur j e?a r Power Planto,

" October 1975.

NUREG-75/087, " Standard Review Plan for the Peview of Safety Analysis Reports for Nuclear Power Plants."

Section 9.5.1, " Fire Protection System."

9.5-4 Amendment 8

GIBBSSAR Section 3. 6.1, " Plant Design for Protection Against Postulated Piping Failures in Fluid Systems Outside Containment."

Section 6.4, " Habitability Systems."

Appendix A, " General Design Criteria for Nuclear Power Plants,"

to 10 CFR Part 50, " Licensing of Production and Utilization Facilities," General Design Criterion 3, " Fire Protection."

Regulatory Guide 1.6, " Independence Between Pedundant Standby (Onsite) Power Sources and Between Their Distribution Systems."

Fegulatory Guide 1.32, " Criteria for Safety-Related Electric Power Systems for Nuclear Power Plants."

Fegulatory Guide 1.39, " Housekeeping Requirements for Water-Cooled Nuclear Power Plants."

Pegulatory Guide 1.52, " Design, Testing, and Maintenance Criteria 8 for Engineered-Safety-Feature Atmosphere Cleanup System Air Filtration and Adsorption Units of Light-Water Cooled Nuclear Power Plants."

Pegulatory Guide 1.70, " Standard Format and Content of Safety Analysis Reports for Nuclear Power Plants,d Pevision 2, Section

9. 5.1.

Pegulatory Guide 1.75, " Physical Independence of Electrical System."

Fegulatory Guide 1.88, " Collection, Storage, and Maintenance of Nuclear Power Plant Quality Assurance Records."

Pegulatory Guide 1.101, " Emergency Planning for Nuclear Power Plants."

Pegulatory Guide 1.120, " Fire Protection Guidelines for Nuclear Power Plants," Revision 1.

Other_ Documents ANSI Standard B31.1-1973, " Power Piping."

ANSI Draft Standard N18.10, Fire Protection Criteria for Safety-Related Structures and Equipment for Water-Cooled and Moderated Nuclear Power Generating Plants.

9. 5- 5 Amendment 8

GIBBSSAR h

ASME Boiler and Pressure Vessel Code, Section VIII-1.

ASTM D-3014, Test for Flammability of Figid Cellular Plastics ASTM D-3286, " Test for Gross Calorific Value of Solid Fuel by the Isothermal-Jacket Bomb Calorimeter ( 1973) . "

ASTM E-84, " Surface Burning Characteristics of Building Mat erials (1976) ."

ASTM-E-119, " Fire Test of Building Construction and Materials

( 197 6) ."

IEEE Std 383-1974, "IEEE Standard for Type Test of Class IE Electric Cables, Field Splices, and Connections for Nuclear Power Generating Stations," April 15, 1976.

IEEE Standard 384-1977, " Criteria for Independence of Class IE Equipment and Circuits" 8

MAEPP-NELPIA " Specifications for Fire Protection of New Plants."

MIL-F-51068C, Particulate High-Efficiency Fire Fesistant Filters S PP- 13, Industrial Fire Brigades Training Manual UL 586, High Efficiency Particulate Air Filter UL 723, Test Method for Fire Hazard Classification of Building Materials Factory Mutual System Approval Guide - Equipnent, Materials, Services for Conservation of Property.

" International Guidelines for the Fire Protection of Nuclear Power Plants," National Nuclear Risks Insurance Pools, 2nd Peport (IGL) .

NFPA " ire Protection Handbook.

Underwriters' Laboratories Rating List.

Underwriters' Laboratories, " Building Materials Directory."

9.5-6 Amendment 8

GIBBSSAP 9.5.1.2 System Description

a. General Description Water for the fire protection system is site specific. A discussion of the fire water source will be provided in the Utility-Applicant's SAR.

The water supply system is designed based on the largest anticipated water demand of any sprinkler or deluge system in the plant for 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , plus 750 gpm for hose streams. The fire protection system water flow diagrams are provided on Figures 9.5-la, 9.5-1b and 9.5 (later) .

Two equal capacity fire protection pumps, one motor-driven and one diesel engine-driven is provided. A jockey pumps is provided to maintain full system water pressure at all times.

The fire protection pumps are located outside the primary plant. As a minimum the fire suppression system shall be 8 capable of delivering water to hose streams located near equipment and components required for safe shutdown following an SSE. These areas are supplied fire water to the hose stations from a seismic Category I pump and source.

b. Fire Suppresion Components Fire protection consists of the following:

1) Sprinkler water systems located in various areas of the plant equipped with alarm check valves and an annunciator in the control room

2) Deluge water systems located in various areas of the plant equipped with water motor alarms and an annunciator in the control room

3) Peadily accessible portable extinguishers located throughout the various buildings to meet specific atea requirements

4) Fire hose stations located throughout the various buildings

5) An automatic fixed halon extinguishing system is used in the plant computer room.

9. 5- 7 Amendment 8

GIEDSSAP O

6) Approved yard fire hydrants are providec for overall area protection of the plant structures.

c. Fire Detection Components Fire and smoke detection devices include:

1) Ionization smoke detectors

2) Thermal Detectors

3) Flame detectors

4) Combination of items 1, 2 and/or 3.

The fire detection system is provided with backup onsite power supply for operation in the event of loss of normal onsite power. The type of detectors provided throughout the plant are comparable with combustible material located in the specified fire areas. 8 9.5.1.3 System Evaluation Analysis of the potentially adverse effects protection and the fire detection system are of the evaluated fire as lll follows:

a) Fire Detection A fire detection system is provided to ensure that a single failure in one zone will not incapacitate the detectors in an adjacent detection zone. Primary and secondary power sources shall be provided for the fire detection systems. Fire detection system control and annunciation is addressed in the Utility Applicant's SAF.

b) Pipe Pupture Ruptures in Fire Protection System piping are indicated in the control room by the starting of the main fire protection pumps without fire detection anunciation, automtic supression system alarms, hose stream actuation alarms or usage of yard fire hydrants. See the f ailure mode and effects analysis provided in Table 9.5-7.

9.5-8 Amendment 8 I!h

GIBDSSAP c) Autonatic Suppression System Failure Loss of automatic opening of the system valve results in the temporary loss of that sprinkler or deluge system until the effected unit can be operatd manually. Portable fire extinguishers and/or manual hose stations are provided in all areas as backup systems. See the failure mode and effects analysis provided in Table 9.5-8 for the effects of fire protection system operation on ESF operation.

9.5.1.4 Inspection and Testing Requirements Typical inspection and test requirements for the fire protection system are as follows:

a. Underground mains supplying wet pipe s, dry pipes, and stand-pipes are hydrostatically tested in accordance with ANSI Standard B31.1, " Power Piping". Leakage does not exceed 2 quarts per hour per 100 joints for all pipe diameters.

Inspection is made to ensure that there is proper depth of 8 cover, all joints are connected properly, anchors installed where required, thrust blocks are properly sized are and located, and backfilling over water mains is in accordance with the NFPA. Each hydrant and all sectionalizing and control valves are tested by being opened and closed while the fire pump is running.

b. Sprinkler and water spray systems are hydrostatica? ly tested for not less than 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months at 200 psig or at 50 psig above maximum static design pressure, whichever is greater. All piping must produce no measurable leakage.

c. Each fixed water spray system serving outdoor transformers is tested by discharging water to the transformers. Water discharge tests of these systens are conducted in accordance with NFPA 15. The system tests include testing of automatic detection equipment.

d. Tests of all indoor sprinkler and water spray systems include iperating tests on all system componenta, including automatic detection equipment, to ensure a satisfactory operating condition.

9.5-9 Amendment 8

GIBBSSAP h

c. These tests do not include water discharge. Hose systems are hydrostatically tested at not less than 200 poig pressure for not less than 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or at 50 psig in excess of the normal design pressure, whichever is greater. All pipino munt produce no measurable leakage,

f. Halon system discharge, weight and pressure of refilable containers are tested at least annually to ensure that the system is in full operating condition. Halon piping is tested with dry nitrogen or a substitute gas under 360 psig for leaks.

g. After completion of system installation, all equipment and devices are tested to demonstrate correct performance.

h. The fire pumps are tested periodically in accordance with NFPA requirements.

i. Acceptance test are performed in accordance with NFPA 8 Standards on heat, flame and smoke detectors. Periodic inspection and testing of the fire protection system and components are conducted in accordance with NFPA Standards &

throughout the life of the plant. W 9.5.1.5 Personnel Qualification and Training A discussion of personnel qualification and training programs is addressed in the Utility-Applicant's SAR.

9.5.1.6 Compliance with the Guidelines Presented in Standard Peview Plant 9.5.1 and NRC BTPASB 9.5-1.

To facilitate staff review of this section with regards to NFC guidelines for fire protection, the format of the regulatory position has been adopted to the extent practical.

9.5.1.6.1 overall requirements of the Fire Protection Program

a. Personnel The responsibility for the overall fire protection program is within the Utility-Applicant's scope. The overall fire protection program is addressed in the Utility-Applicant's BAR. Gibbs & Hill provides the applicant with an adequate fire protection program developed by qualified engineers.

This staff will be responsible for the following:

9.5-10 Amendment 8

GIBBSSAP

1) Coordinate the fire protection prog ram, including analysis of potential hazards and subsequent system and building layout designs

2) Development of fire detection and suppression systems.

3) Assist the Applicant in the development of an overall fire protection program including:

a) Inspection and testing of fire protection system equipment and components.

b) Training of plant and fire brigade personnel is addressed in the Applicant's SAP.

c) Implementation of a fire protection program during plant construction.

8 b) Fire Hazard Analysis A fire hazard analysis has been performed during initial plant design to facilita te specific fire protection requirements. This analysis is periodically updated as design and engineering proceed.

The results of the fire hazard analysis for the various areas of the plant are provided on Figures (later) through (later) .

The results of the fire hazard analysis of the fire areas (Appendix 9A-later) are provided in the Fire Hazard Analysis Summary Table (later) . For each area the following information is provided.

a. Identification of equipment within the specific fire area. Identification of equipnent safety class

b. Equipnent location

c. Identification of combustible materials and their amo unts.

d. Calculation of combustible heat load

e. Identification of both fixed and portable fire suppression equipment

f. Identification of fire detection equipment.

9.5-11 Amendment 8

GIBBSSAF g

g. Analysis of effecte of tha postulated fire !

c) Fire Suppression System Design Basis

1) Total reliance has not been placed on any single fire ,

suppression system. Adequate backup fire suppression' capability is provided throughout.

2) A single active failure in the fire protection system!

will not impair both the primary and backup fire l suppression capabilities. The results of the failure !

modes and ef fects analysis are presented in Table 9.5-7.1

3) Provisions will be made to ensure that water is available to hose stations located near areas containing equipment required for safe shutdown following a safe shutdown earthquake (SSE) .

4) The fire protection system shall retain its original 8 design capacity against man made and natural phenomena of less serverity and greater frequency than the most severe natural phenomena. Consideration of these site specific phenomena (e.g. , oil barge collisions, small a intensity earthquakes and aircraft crashes) are W addressed in the Utility-Applicant's SAF Lighting protection will be provided in accordance with NFPA Standards.

5) The consequences of inadvertent operation of, or a rupture in, the fire suppression system shall meet the guidelines set forth in SRP Section 3.6.1. See Tables 9.5-7 and 9.5-8 for the results of Failure Mode and Effects Analyses, d) Simultaneous Events

1) Fires are not postulated concurrent with non-fire related failures, SSE, or other plant accidents in safety relted systems.

2 GIBBSSAP is designed for multi-reactor sites. Unrelated fires have not been postulated to occur simultaneously in more than one unit.

9.5-12 Amendment 8

GIBBSSAP e) Implementation of Fire Protection Program The implementation of the fire protection program is addressed in the Applicant's SAP.

On sites where there is an operating reactor and construction of another unit is under way, the fire protection program provides for continuing evaluations of potential fire hazards.

9. 5.1. 6. 2 Administrative Procedures, Controls and Fire Brigade The overall responsibility for the administrative procedures, controls and fire brigade are within the scope of the Applicant and is addressed the Applicant's SAP.

9.5.1. 6. 3 Quality Assurance Program g

The quality assurance (QA) program for fire protection is designed such that guidelines for design, procurement, installation, testing and administrative controls for safety related areas are satisfied. The QA program, as it applies to GIBB SSAF , is described in Chapter 17. Other portions of the QA program are addressed in the Utility / Applicant's SAF.

9.5.1.6.4 General Plant Guidelines a) Building Design The Gibbs & Hill Standard Nuclear Power Plant is divided into a series of fire areas as shown on Figures (later) through (later) . The primary consideration in this layout was the separation of safety-related systems and components from their redundant counterparts and the isolation and separation of fire hazards from safety-related systems. Consideration was also given to the isolation of combustible concentrations which are not located in, or exposed to areas containing esfety-related components, and to provide for access and egress routes to Fire Areas for plant personnel and the fire brigade.

9.5-13 Amendment 8

GIBBSSAF O

1) Structural construction elements are composed of noncombustible materials. Structural wa lls, floors and ceilings consist of poured reinforced concrete, concrete block or structural steel fra ning with precast concrete panels. Whe re these ansemt as are designated as fire barriers the ratings are for 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire duration.

2) These (3) hour fire barriers have been provided to separate redundant safety divisions f' rom each other.

Where redundant systems cannot be separated by fire barriers, it is necessary to provide adequate spatial separation between these redundant divisions. Cables servicing these safety divisions are separated in accordance with Fegulatory Guide 1.75 and IEEE 384.

3) Each cable spreading room contains only one redundant safety division. Cable spreading rooms a re separated from one another and from other areas of the plant by 8 fire barriers with a 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire duration. Cable spreading rooms are not shared between units.

4) Interior walls and partitions, designated as fire barriers, are constructed of concrete noncombustible steel studs and gypsum dry wall. The block and/or lll construction details are in accordance with an Underwriters' Laboratories, Inc. approved concrete block and dry wall design.

Fire protection criteria associated with building thermal insulation and pipe lagging require one of the following:

1) The use of materials which do not ignite or burn when subjected to fire

2) When item 1) cannot be fully complied with, the materials used have a rating not greater than 50 with respect to flame spread, fuel contribution, and smoke-development. The test for surface burning characteristics of building ma te rials conforms to ASTM E-84.

Fire-retardant-type electrical wire insulation burns very slowly, accompanied by considerable smoke. Since the insulation is self-extinguishing in accordance with IEEE 383 requirements, it prevents the propagation of 9.5- 14 Amendment 8 h

GIBBSSAR fire beyond the area of influence of the energy source that initiated the fire.

a) Interior finishes such as gypsum plaster, ceramic tile and acostical ceiling materials are noncombustible. The acoustical tiles are mineral fiber board with a flame spread rating of less than 50 per ASTM E-84, " Surface Burning Characteristics of Building Materials".

b) The potential heat release of the above building materials will be limited to 3500 Btu /lb when tested under ASTM D-3286 or NFPA 259.

5) Where metal deck roofing is used, it will conform to Underwriters' Laboratories listing or Factory Mutual Approved.

6) Suspended ceilings and their supports are constructed of noncombustible materials. Concealed spaces are devoid of combustibles to the extent practical. 8

7) Transformers located indoors will be of the dry type.

8) Oil filled transformers are separated from safety related structures and by at least 50 feet or 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire barriers, oil spill confinement is provided with drainage away from the plant structures.

9) Floor drains will be provided in the main buildings. In areas containing sprinkler or deluge water systems, the drains will be sized to handle the expected flow at a rate which is sufficiently adequate to protect safety related equipment in the fire area.

Drainage water from potentially radioactive areas will be collected, sampled and analyzed. Should the water volume exceed the 10,000 gallon capacity of the waste collection tank, the area will be treated and analyzed on an emergency basis prior to release to the environment.

9.5-15 Amendment 8

GIBBSSAF O

Special provisions have been made to ensure that drains, within areas containing combustible liquids, will prevent the spread of fire through the drainage system.

Containment curbs are provided to prevent combustible liquids from entering either the floor or equipment drain systems.

10) All floors, walls and ceilings separating fire areas have a three (3) hour fi re rating. Figures (later) through (later) provide the designation and location of the individual fire areas.

All penetrations in designated fire barriers are sealed with dn approved fire stop material. The pe ne t ration s seals have the same fire resistance ratings as that designated for the barrier (3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months ) .

Door openings in designated fire barriers are provided with approved labelled fire doors. All doors through 8

fire barriers have t hree (3) hour fire ratings equivalent to that required of fire barriers. These doors are of the automatic self closing type, normally closed or locked closed. Appropriate alarm mechanisms and anunciation system is provided in accordance with lll the plant security program.

Flexible air duct coupling in ventilation and filtration systems shall be noncombustible.

11) All stairwells and elevators are enclosed by 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months rated fire barriers and provided with doors ha ving and equivalent fire rating. Each personnel access and egross is provided with escape routes.

12) All fire exitsshall be clearly indicated.

b) Control of Combustibles

1) Safety related systems and components are isolated from combustible materials. This isolation is accomplished by spa tial separation, fire barriers, fire detection, fire suppression, or any combination thereof to limit the effects of the fire as identified in the Fire Hazard Analysis Summary Table (later) .

9.5-16 Amendment 8

GIBBSSAR

2) Bulk storage of all flammable and/or explosive gases is located outside the Gibbs & Hill Standard Nuclear Fower Plant. The storage facilities are open structures located outdoors in the yard. An explosion and/or fire in this area will not affect any of the primary plant buildings.

3) The cable insulation and jacketing material selected has a high flame resistance and low smoke and offgas characteristics without degrading physical properties.

The use of plastics as construction material within the plant is minimized to the extent practicable.

4) All significant amounts of flammable liquids are stored in separate Fire Areas that are isolated from the adjacent plant areas by three-hour fire rated barriers.

The type and amount of flammable liquids in each area is provided in Table (later) . As a minimum fire detectors 8 are provided in each area, and dependent upon the hazard a fixed fire extinguishment system may be provided.

In all instances such areas do not present a potential hazard to equiprent located in the adjacent areas.

Diesel fuel oil bulk storage tanks are buried underground outside of the Auxiliary Building in close proximity to the emergency diesel generators. They are buried in accordance with NFPA-30 Code requirements.

c) Electrical Cable Construction, Cable Trays and Cable Penetrations.

1) Cable trays and conduits, not embedded, are constructed of metal. Conduits embedded in concrete may use transite, metal or some other non-combustible material.

Flexible metallic conduit may be used in short lengths to connect to equipment. Thin wall metallic tubing is not used.

2) Redundant safety-related cable system outside the cable spreading room are separated from each other in accordance with Pegulatory Guide 1.75 and IEEE 384. If in a non-safety-related area, a potential fire exposure hazard exists to a redundant safety related cable required to achieve and maintain cold shutdown, fire barriers or spatial separation are used to protect the safety related cable.

9.5-17 Amendment 8

GIBBSSAP O

Non-safety-related cable systems are separated from!

safety-related systems in accordance with Pequiatory Guide 1.75 and IE EE- 3 8 4. The methods applied detends upon the combustible fire loading in the area, the primary protection system provided and the time required for the fire fighting personnel to reach the area.

The cable systems are normally accessible for manual fire fighting. Smoke detectors are provided in the majority of areas of these cable systems.

Safety related cable systems with significant combustible loading, which are not readily accessible for manual fire control are protected by smoke detectors and an automatic water sprinkler system.

Areas that are physically enclosed and do not contain removable panels or doors, and areas which are not readily accessible for manual fire fighting due t 8 excessive radiation levels, are qualifying examples of GCH's definition of inaccessible or not readily accessible area.

The cables are designed for wetting down with fire suppression water without electrical faulting. Manual llh hose stations and portable hand extinguishers are also provided. Safety-related equipment in the vicinity of such cable systems that does not itself require fixed water suppression systems but is subject to unacceptable damage from water is protected.

3) Cable and cable tray penetration of fire barriers (vertical and horizontal) are sealed to give protection equivalent to that required of the fire barrier. The design of these fire barriers meet the test requirements of ASTM-E-119, " Fire Test of Building Construction and Materials".

Openings inside conduit larger than 4 inches nominal in diameter are sealed at the fire barrier penetration and meet the test requirement of ASTM-E-119. Openings inside conduit 4 inches nominal or less in diameter are sealed at the fire barrier and meet the test requirements of ASTM-E-119, unless the conduit extends at least 5 feet on each side of the fire barrier and is sealed either at both ends or at the fire barrier with non-combustible material.

9.5-18 Amendment 8

GIBBSSAP

4) Fire stops are provided within the cable trays whenever the cables penetrate walls or floors designated as fire barriers. Fire stops are provided in long vertical runs and are located at intervals equivalent to floor spacings.

The fire stop specification will require that the fire stop design prevent the propagation of a fire for a minimum period of thirty minutes when tested for the largest number of cable routings and maximum cable density.

Vertical cable tray runs are provided with solid steel covers for a minimum distance of 6 feet-0 inches above the floor for physical protection of the cable.

5) Only electric cable construction that passes the current IEEE Standard 383 are used in cable trays. Any exception will be addressed in the Utility-Applicant's SAR. 8

6) Cable raceways are used only for cables.

7) Miscellaneous storage and piping for flammable or combustible liquids or gases are situated such that they do not create a potential exposure hazard to safety related systems.

d) Ventilation

1) In all cases during a fire, the affected area will be isolated from the balance of the HVAC system. The smoke and hot gases will be contained in the area until monitored. Subsequent to monitoring, smoke removal will be generally accomplished by the use of manually controlled releases through the plant ve ntilation systems. Smoke control and removal is in compliance with NFPA-204.

All ductwork that penetrates a designated fire barrierr is equipped with an approved damper with a rating equivalent to that designated for the barrier. All fire dampers are equipped with heat-responsive elements which automatically release the fire damper blade when the air temperature in the ductwork exceeds the predetermined element operating temperature. Fire dampers are normally open and close during a fire condition. Fire 9.5-19 Amendment 8

GIBBSSAF O

dampers in the computer rooms are equipped with halon overrides to ensure closure prior to release of the halon system protecting the respective area. Fire dampers located in d uctwork supplying ventilation to areas con'.aining safety-related equipment are seismically qualified to ensure that the dampers will not close during a seismic event. Dampers located in fire barriers are fire rated. These dampers are equipped with fusible links to ensure closure in the event of a fire.

Fire detectors are located in the ductwork supplying air to the control room. This ensures that a fire in one train of the ventilation system will not impair safe shutdown, as the redundant train will be used.

2) Smoke and gases generated from fires involving radioactive materials are monitored for radioactivity using the monitors installed at the plant vent stack.

8

3) Ventilation power and control cables are separated by safety division, for safety related areas. Power supply and controls for the ventilation system are routed outside the fire area served by the system to the extent a practical.

W

4) Engineered safety features filters are protected in accordance with the guidelines of NRC Pegulatory Guide 1.52.

Charcoal filter fires are considered on the basis of the total quantity of charcoal in the filters. The filter train can be readily isolated from the remainder of the ductwork by fire dampers. The charcoal filter is contained within a steel container.

Each filter train is protected by a separate heat detection and water deluge system. The warning thermostats alert the operator to isolate the filter and actuate the deluge system if required.

9.5-20 Amendment 8

GIBBSSAP

5) Fresh air supply intakes are physically remote from air exhaust outlets for areas containing safety-related equipment.

6) Stairwells are designed to miniraize smoke infiltration.

7) The type and quantity of breathing air units and reservoir storage are discussed in the Utility-Applicant's SAR.

8) A fixed automatic halon system is provided in the plant computer room, e) Lighting and Communication To facilitate safe shutdown and emergency response in the event of fire, suitable fixed and portable emergency lighting and two-way voice communication devices are provided as follows:

8

1) AC emergency lighting (powered from the non-Class IE diesel generator) is provided in vital plant areas and primary access and egress routes. The most crucial areas, such as the control room, major remote shutdown areas and vital access routes between them also have de-emergency lighting (powered from the non-Class IE station battery) .

These areas, as well as all areas that must be manned for safe shutdown, (and the access and egress routes between thera and between all fire areas) incorporate fixes self-contained lighting consisting of sealed-beam or, where not restricted, fluorescent units, with individual eight-hout minimum battery power supplies.

Safe shutdown areas include those required to be manned if the control room must be evacuated . When remote sealed beam heads are used they are located in the same fire area as the battery pack that energizes them. Each battery pack unit contains an individual battery and an integral automatic charger.

9.5-21 Amendment 8

GIBBSSAR O

2) Suitable sealed-beam, battery powered portable hand lights are provided for emergency use by the fire brigade and other personnel required to achieve safe plant shutdown. These units and spare batteries are located at strategic locations throughout the plant.

3) Fixed emergency communication devices, independent of the normal plant communication system, are installed at vital stations throughout the plant. Sound powered units connected to jack stations are used in this system.

4) A portable radio two-way voice communications system is provided for use by the fire brigade and other operations personnel required to achieve safe plant shutdown. This system does not interfere with the communications capabilities of the plant security force.

Fixed repeaters, installed to permit use of portable radio communication units, are protec'ad from exposure 8 fire damage. Preoperational and periodic testing demonstrates that the frequencies used for portable radio communication will not affect the actuation of protective relays. lll

9. 5.1. 6. 5 Fire Detection and Suppression The fire protection systems, which provide means for detecting, alarming and extinguishing fires is comprised of two maior, basic subs ystems: The Fire Detection System and the Fire Extinguishing systems.

The Fire Detection System is a plantwide instu cmentation system designed to detect fires in the various fire arens of the plant and alert the control room operators, and subsequently the plant fire brigade of the fire and its location.

The Fire Extinguishing Systems include, sprinkler systems (both automatic wet pipe and preaction) , automatic and remote manual deluge water spray systems, fixed hamon extinguishing systems standpipe and hose statious (both wet and dry) and portable fire extinguishers. The extinguishing systems are designed in accordance with NFPA requirements. To ensure that failure of any portion of the fire extinguishing systems will not damage safety-related equipment required for safe shutdown fire protection piping, supports and system components required af ter 9.5-22 Amendment 8

GIBBSSAR an SSE are designed in accordance with seismic Category I requirements.

a) Fire Detection Fire, smoke, and heat detection devices located throughout the entire plant include:

a. Ionization smoke detectors

b. Thermal detectors

c. Flame detectors

1) Fire Detectors have been provided in all areas which contain potential hazards to safety related equipment.

2) Fire detection systems comply with the requirements of Class A systems as defined NFPA 72D, 0 in

" Standard for the Installation, Maintenance and Use of Proprietary Protective Signaling Systems," and Class I circuits as defined in NFPA 70, " National Electrical Code".

3) The location and selection of fire detectors are in general agreement with the requirements of NFPA 72E, " Automatic Fire Detectors."

4) Fire detectors are strategically located to detect fires, annunciate alarms, and indicate the location of the alarm in the control room. The detection system is designed to permit audible and visual trouble indication signals in the control room should a fault or short circuit occur.

5) The fire alarm system provides an audible sound distinctly different than any other plant alarm system.

6) Primary and secondary power supplies are provided for the fire detection system and for electrically controlled automatic suppression valves. Primary power is supplied from normal onsite power, along with a four hour non-Class IE battery supply 48 backup. In those areas containing safety related equipment required for safe shutdown af ter an SSE 9.5-23 Amendment 8

GIPDSSAR O

the fire detectors are connected to a non-Class IE diesel which is seismically qualified. This non-Class IE diesel is located within a seismic Category I structure.

b) Fire Protection Water Supply Systems

1) The fire protection supply system is designed in accordance with the appropriate NFPA requirements. The system capacity is based on the largest expected flow demand plus 750 gpm for manual hose streams for a minimum of two (2) hours.

The source of the fire protection water supply is site specific and is addressed in the Utility-Applicant's SAR. The underground yard fire mains are installed in accordance with NFPA 24, " Standard For Outside Protection."

The yard piping loop consist of cement lined cast or 8

ductile iron pipe with mechanical joints to minimize tuberculation effects. Flushing of the system is accomplished through yard hydrants, hose connections and various system drains.

encompasses the plant.

The yard piping circuit Post indicator valves are llk provided for sectionalizing as well as for the numerous branch connections. These valves permit isolation of portions of the loop during normal maintenance or should pipe rupture occur.

Approved two-way hydrants, isolated by individual auxiliary gate valves (curb box valves) , are provided adjacent to the yard loop. Each hydrant is equipped with two 2-1/2 inch hose outlets. A 2-1/2 inch outside independent hose gate valve is connected to each outlet to provide individual control of the hoses.

2) Interconnections with other fire loops from other units, is site specific. Should any such loop be required, it is addressed in the Utility-Applicant's SAP.

9. 5- 23a Amendment 8

GIBBSSAR

3) Two 100 percent capacity pumps, one ac motor driven and one diesel engine driven pump are provided. Each pump is rated at 2500 gpm. The day tank fuel supply for the diesel driven fire pumps is provided adjacent to the engine driven pump. A 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire barrier separates the fuel supply from the pump. The fire water pumps shall comply with the requirements of NFPA 20, " Standard for the Installation of Centrifugal Fire Pumps." One ac motor driven jockey pump is provided to maintain system pressure.

4) The fire protection water supply system is site specific and is addressed in the Utility-Applicant's SAR.

5) The fire protection system water supply design basis is discussed in section 9.S.1.6.5b(1) .

6) Fire hydrants are located a maximum of 250 feet apart on the main yard loop. Fire hydrants permit protection of 8 onsite locations of fixed or transient combustibles.

Hose houses and equipment are provided in accordance with NFPA 24, "Outside Protection".

Threads compatible with those used by the local fire department are utilized on the hydrants, hose couplings and standpipe risers. Thread size and type is addressed in the Utility Applicant's SAR.

c) Water Sprinkler and Hose Standpipe Systems

1) Hose stations and sprinkler systems have connections to the main yard piping which ensure that neither a passive or an active failure in a line will impair both the primary and secondary fire suppression systems. Piping and fittings meet the requirements of ANSI B31.1, " Power Piping." Each sprinkler and standpipe system is provided with an approved isolation valve.

Safety related equipment which does not represent a fire hazard and could be damaged by water, is protected against such damage through the use of water shields or baffles.

9.5-23b Amendment 8

GIBBSSAP O

2) Design of control and sectionalizing valves in the fire protection system ensures that they are sufficiently monitored to indicate valve position. Elect rica l supervision of the valves conforms to NFPA 26 Code requirements. Electrical supervision signals are indicated in the control room.

3) Fixed water spray systems conform to the requirements of NFPA 13, " Standard for Installation of Sprinkler Systems," and NFPA 15 " Standard for Water Spray Fixed Systems".

4) Interior hose stations are able to reach any and all locations that contain safety related equipment which may be exposed to a potential fire hazard. Standpipes and hose systems are designed and installed according to the requirements of NFPA 14, " Standpipe and RoseSystems."

Fire 8 hose stations have been located to facilitate ease of access to any given fire area as denoted by Table (later). Sufficient hose stations and backup equipment have been provided to preclude physical blockage of a particular hose station. lll Fire protection piping and hose stations located in or near areas containing safety related equipment required for safe shutdown following an SSE is seismic Category I and performs their intended design function following an SSE.

5) The proper type of hose nozzles to be utilized in each fire area are based on the hazard analysis. This item is addressed as plant design proceeds.

6) Foam fire suppression systems are addressed in the Applicant's SAF d) Halon Suppression Systems Fixed automatic halon suppression systems are used in the plant computer room.

e) Carbon Dioxide Suppression Systems 9.5-23c Amendment 8

GIBBSSAR Carbon dioxide suppression systems are not used on the GSH Standard Nuclear Power Plant design.

f) Portable Entinguishers Fire extinguishers are selected and provided in accordance with NFPA 10, " Portable Fire Extinguishers, Installation, Maintenance and Use." The fire extinguisher provided throughout the plant are based on various considerations, such as, quantity of agent required, anticipated combustibles, cleanup after use, toxicity a nd corrosive characteristics, and other possible adverse effects associated with the agents used.

9.5.1.6. 6 Guidelines f or Specific Plant Areas a) Primary and Secondary Containment

1) Normal Operation 8

Fire protection for the containment building (CCB) have been provided based on the fire hazards analysis for the area. Demineralized water shall be utilized in the CB for all sprinklers and manual hose stations. Automatic shutoff sprinkler systems are provided inside containment. For potential hazards from the lubricating oil of the main reactor coolant pumps. The sprinkler system is thermally activated with automatic shutoff to limit use of unborated water in the CB. The fire protection system operation does not compromise the integrity of the CB or other safety-related systems.

Fire detectors are provided with reagrds to the specific fire hazard as identified in Table (later) .

General area fire detection is provided throughout the CB as required as backup to specific hazard detectors.

Fira detectors located in the CB will be compatible with the anticipated containment environment.

The G6H standard plant design does not include an open annular space through which cable passes.

9. 5- 23d

GIBBSSAR O

2) Refueling and Maintenance Administrative pr.ocedures and controls used to limit combustibles in the CB during refueling and maintenance will be discussed in the Utility Applicant's SAP.

Appropriate manual firefighting capability will be permanently installed in the CB. Standpipes and hose stations located near equipment required for safe shutdown are operational following an SSE. The containment penetrations for the standpipes required after an SSE are designed to meet the isolation requirements of Genral Design Criterion 56 and are seismic Category I and quality group P. Portable fire extinguishers are located for ease of access just outside the personnel air locks and one way emergency exit.

Self-contained breathing apparatus are provided just outside of 1the personnel and emergency air locks.

These units shall be clearly marked as emergency equipment. The quantity of self contained breathing units is addressed in the Utility / Applicant's SAP. 8 b) Control Foom Complex 9

The entire control room complex (including office space, dining areas and galleys) are protected against fire. The control room complex is separated from other areas by fire floors, walls and ceilings with 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire durations.

Peripheral walls are constructed of non combustible material with a 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire resistance.

Manual firefighting capability has been provided for:

1) Electrical fires originating in a cabinet or cables.

2) Ordinary combustibles in the general room area.

Adequate hose station coverage is provided immediately outside the control room complex. The hose station nozzles are selected based on the actual firefighting needs of the area. Portable halon fire extinguishers are provided in the control room complex. Smoke detectors are provided throughout the control room, in control room cabinets and consoles. Detector alarm and indication are provided in the control room.

9.5-23e

GIBBSSAP Self-contained breathing apparatus are readily available to the operators and shall be clearly marked emergency equipment.

Smoke detectors and fail closed fire dampers are provided for all ductwork which is an integral part of the control room ventilation system to enable manual isolation of the control room ventilation system and thus prevent smoke from entering the control room.

Smoke caused by fire in the control room shall be manually vented through the normal ventilation system.

Provision for isolating the recirculation portion is also provided. No cables simply pass through the control room without terminating there or performing a function in the control room. Cabling in the control room is minimized to the extent practical.

There are no underfloor cabling spaces in the control room. Ceiling space cabling conform with the requirements of Regulatory Guide 1.75 and IEEE 384.

8 Fully enclosed electric raceways in ceiling spaces have a cross sectional area of one square foot or less or consist of 4-inch or smaller steel conduits.

c) Cable Spreading Pooms The primary fire suppression for the cable spreading rooms is a preaction, multizone automatic sprinkler system. Provision for manual operation at a remote station is also provided.

The location of sprinkler heads will consider cable tray arrangements to ensure adequate water coverage for areas that could present an exposure hazard to the cable system.

Manual hose stations are strategically located outside the cable spreading rooms. Cables are designed to allow wetting down with water supplied by the fire suppression system without electrical faulting.

The cable spreading rooms incorporate the following design features:

1) One cable spreading room on elevation 115'-6" for Train A, Channel I, Channel III, safety related cables and non safety related cables.

9.5-23f

GIBBSSAR O

2) One cable spreading room on elevation 150'-6" for Train B, Channel II, Channel IV, safety related cables and non safety related cables.

3) Separation between safety related cables and non safety related cable systems conform to the requirement s of Pegulatory Guide 1.75

4) At least two remote and separate entrances for access by fire brigade personnel

5) Aisie separation at least three feet wide and eight feet high between tray stacks.

6) Hose stations and portable extinguishers located immediately outside the cable spreading rooms.

8

7) Area smoke detectors.

8) Drains sized for removing water released by the hose stations and automatic hose stations and sprinkler systems.

9) Seals capable of maintaining watertight integrity are O provided around cables to prevent water from entering the control room panels and boards.

10) Doors and seals prevent undue amounts of water to flood areas outside of cable spreading rooms. These areas are equipped with adequate drainage capability.

Each cable spreading room is separated from the other and from other plant areas by three (3) hour fire barriers.

The ventilation system for each cable spreading room is designed with fire dampers to isolate the cable spreading areas from the remainder of the plant should a fire occur. Smoke from the cable spreading area will be vented through the normal ventilation system. This venting is manually operable from outside each cable spreading room.

9.5-23g

GIBBSSAR d) Plant Computer Rooms The plant computer is non safety related and is not part of the control room. The plant computer room is separated from other safety related areas by barriers of a 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire duration. Manual hose stations and an automatic halon extinguishing system are provided for fire suppression, e' s tear Rooms Switchgear rooms containing safety related equipment are separated from the remainder of the plant by 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire barriers. Automatic fire detection has been provided for these areas. Detectors will alarm locally and annunciazte in the control room. Cables not terminating in the switchgear room will be minimized to the extent practical. These rooms are not used for any other purpose. Manual hose stations and portable fire extinguishers are provided in a nearby adjacent area for fire suppression.

Adequate drainage is provided to protect safety related equipment from water damage. Smoke from fires can be 8 manually vented through the normal plant ventilation system.

f) Remote Safety-Related Panels Redundant safety-related panels remote from the control room complex are separated from each other by barriers having a three (3) hour fire rating. Fire detectors are provided for the hot shutdown panel rooms and other remote shutdown panel locations. These rooms are separated from other safety-related and non-safety related areas by 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire barriers. Hose stations and extinguishers (portable) are provided in adjacent areas. Combustible materialn are controlled and limited to those required for operation.

g) Safety Related Battery Rooms Safety related battery rooms are protected against fires and explosions. The safety related battery rooms are separated and enclosed by 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire barriers with penetrations and seals of equivalent rating. D.C switchgear and inverters are not located in these battery rooms. Automatic fire detection is provided witn alarm and annunciation in the control room along with local alarms. The ventilation system shall be capable of maintaining hydrogen concentration below 2 percent

9. 5-2 3 h

GIBBSSkP h

by volume. Loss cf ventilation in these areas shall be alarmed in the control room.

Portable extinguishers and hose stations are provided in a nearby adjacent area for adequate fire control.

h) Turbine Building The turbine building is separated from adjacent plant structures containing safety related equipment by barriers of 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire duration. Penetrations and seals in the barrier are of an equivalent rating, and are not located near turbine oil or generator cooling systems to create a direct fire exposure hazard to the barriers. Considering the severity of the fire hazard, additional protection to ensure barrier integrity is provided to assure defense in depth.

1) Diesel Generator Areas The diesel generators are separated and enclosed by barriers 8 with a 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire duration. Diesel fuel oil day tanks are completely separated and enclosed by barriers with a 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire rating. The day tanks are 1790 gallons and are protected by an automatic deluge water spray suppression 3 W

system. The three (3) hour enclosures provided can contain the entire volume of the day tank plus a quantity of water which is sufficient to extinguish a fire should a rupture and fire occur.

Automatic deluge water systems are installed over each diesel generator unit. Manual hose station are provided in an adjacent area to allow access at all times. Portable extinguishers are provided in the area.

Automatic fire Cetection is provided for the area with alarm and annunciation in the control room and alarms locally.

Adequate draina e is provided to handle the flow from the automatic deluge system. Means for manual venting of smoke are provided.

Similar fire detection and suppression methods are utilized for the non-nuclear safety auxiliary diesel generator.

9.5-23i

GIBBSSAR j) Diesel Fuel Oil Storage Areas The diesel fuel oil storage tanks are buried below ground.

The diesel fuel oil storage tanks comply with the guidelines of NFPA 30, " Flammable and Combustible Liquids Code. "

Potential oil spills are confined or directed away from the main plant structures.

k) Safety-Related Pumps Pumps houses and rooms housing redundant safety related pump trains are separated from each other and from other areas of the plant by 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire barriers. These rooms are protected by automatic fire detectors with local alarms and alarms and annunciation in the control room. Portable fire extinguishers and manual hose stations are readily accessible in adjacent fire areas.

8 Floor drains are provided to prevent water danage to other safety related equipment. Fire dampers are installed in the ductwork to prevent the spread of fire. The smoke from a fire in any one of these rooms can be manually vented through the normal plant ventilation system.

1) New Fuel Area The new fuel area is separated from the remainder of the plant by a 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire barrier. Automatic fire detection is provided with alarm and annunciation in the control room with alarms locally. Readily accessible portable extinguishers and manual hose stations are located within the area.

Combustibles within the area are limited to a reasonable minimum. Adequate drainage is provided to preclude significant water accumulation. The configuration of new fuel storage precludes criticality for any water density that might occur during fire water application.

m) Spent Fuel Pool Area Fire protection for the spent f uel pool area is provided by a complete enclosure with at least a 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire duration. An automatic fire detection system is provided with alarm and annunciation in the control room and alarms locally.

Portable extinguishers and hose stations are provided in an adjacent area.

9.5-23j

GIBBSSAP O

n) Radwaste and Decontamination Areas Radwaste and decontamination areas are protected by enclosures which separate these areas from safety related equipment. These enclosures have a 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire duration.

Area fire detection is provided with alarm and annunciation in the control room with alarms locally. Means for ventilating the ambient air for these areas is provided.

o) Safety Related Water Tanks Safety related water storage tanks required for safe shutdown are protected from the effects of fire. Combustible material is not stored near outdoor tanks.

p) Records Storage Areas Administrative procedures relating to record storage is discussed in the Utility / Applicant's SAP. Pecord storage will be located and protected so that a fire in this area will not expose safety-related systems or equipment. 8 q) Cooling Towers The use of cooling towers is site specific and within the O

Utility / Applicant's scope. This item, if applicable is discussed in the Applicant's SAR.

r) Miscellaneous Areas Miscellaneous areas such as shops, warehouses, auxiliary boiler rooms are separated and protected by enclosures with a 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire rating. Areas such as fuel oil tanks, flammable and combustible liquid storage tanks are either buried below ground outdoors or are separated from the main plant structure. Fire and smoke these from these areas will not adversely effect operation of safety related equipment.

9.5.1.6.7Special Protection Guidelines a) Storage of Acetylene-Oxygen Fuel Gases Gas cylinder storage location is not in areas that contain or expose safety related equipment or near fire protection equipment which serves those safety related a reas .

Administrative procedures for use of acytylene-oxygen fuel gases is addressed in the Utility / Applicant's SAP.

9.5-23k

GIBBSSAR b) Storage Areas for Ion Exchange Pesins Unused ion exchange resins are not stored in areas which contain or expose safety related equipment.

c) Hazardous Chemicals Hazardous chemicals are addressed in the Utility / Applicant's 8 SAR.

d) Materials Containing Radioactivity Materials which collect and contain radioactivity such as spent ion exchange resins, charcoal filters, and HEPA filters are stored in closed metal tanks located in areas which are free of ignition sources. Due to their potential hazard these areas are separated and enclosed by 3 hour3.472222e-5 days 8.333333e-4 hours 4.960317e-6 weeks 1.1415e-6 months fire barriers.

9. 5- 23 .1

GIBBSSAF h 9.5.2 communication Systems

9. 5. 2.1 Design Bases Intraplant and plant-to-offsite communication systems are provided among the plant buildings, switchyard, and the public telephone system. Telephones, public address speakers, and handsets are conveniently located to permit effective communications between personnel during normal operation, maintenance periods, startup operation, shutdown, and refueling of the plant.

Sound-powe red telephone systems, independent of all external power sources, are provided in critical areas as a backup to the public address systems. These diverse means of communication are physically independent to prevent loss of all systems as a result of a single failure. Diverse plant-to-oftsite communication systems are provided.

9.5.2.2 System Description Detailed description and drawings will be provided in the Utility Applicant's SAR. The intraplant and plant-to-offsite lll communication systems consist of the following systems:

a. Public Address System The public address system provides separate channels for paging and party lines to permit communication throughout the entire plant including the main office and contro'l room. The system also permits two-way communication between two or more locations vital to the operation of the plant and the safety of personnel.

The voice-paging channel output is clearly audible above the highest expected noise levels. Separate and independent party lines permit communications between handsets only, thereby making the page channel available to others.

Three pa rty lines are supplied in addition to the page channel.

All three lines are available at each handset location.

Selection of a desired channel is achieved by means of a multiposition switch provided as part of each handset station.

Both the page channel and the party line channels, which are independent, may be used simultaneously without interference.

4 O

9.5-24

GIBBSSAP Table 9.5-7 (Page 1 of 2)

Failise Mode and Effect Analysis Ability of Fire Protection System to Withstand a Single Active Failure comegnent Malfunctign Effect_gn Comments Eysteg

1. Fire Protection Loss of Power No effect An equal capacity redun-dant engine driven fire protection pump provides an indepen-dent source.

2. Yard Main Loop Pipe Rupture Temporary Post indicating valves loss of in the yard main loop water to permit isolation of one-seg- the ruptured segment.

ment of Flow is available to 8 loop all other segments of the loop.

3. Building Supply Pipe Pupture Temporary Redundant connection Loop in connection loss of to the yard main loop to yard main one seg- ensures a continued loop ment of supply of water to loop the affected building supply loop.

Valves permit isola-tion of the broken segments from the yard main loop and from other portions of the building supply loop.

~

4. Standpipe Pipe Pupture' Temporary A valve is provided loss of in each standpipe hose sta- to permit manual iso-tions and lation Fire extin-sprinkler guishers provide a units ser- backup means of fire ved by extinguishment.

standpipe Amendment 8

GIBBSSAF O

Table 9.5-7 (Page 2 of 2)

Failure Mode and Effect Analysis Ability of Fire Protection System to Withstand a Single Active Failure C9EP9BeDt Malfungt19D Effect on comments SYstgm

5. Hose Stations Pipe Rupture Temporary A valve is provided or Sprinkler loss of in each standpipe System hose sta- to permit manual tions and isolation. Fire sprinkler extinguishers provide units ser- a backup means for ved by fire extinguishment. 8 standpipe supplying water to the rupture hose station or sprinkler g

system 5~sufficent quantity of spare here is provided at strategic 3 locations throughout the plant W Amendment 8

GIBBSSAP Table 9.5-8 Failure Mode and Effects Analysis:

Effect of Fire Protection Operation of ESF Equipment Component Failure _Mgde Effect on Comments Eggigment

1) Cable Inadvertent No effect Cables are designed Spreading operation

to permit wetting Area Sprinkler down by fire protec-Water System tion system.

2) Diesel Gen- Inadvertent Loss of one Peduntant diesel crator Unit operation

diesel generator is Deluge generator unaffected System

3) Fuel Day Inadvertent No effect Day tank is not Tank Deluge operation affected by inadver-System tant operation of the deluge system 8

4) Emergency Inadvertent Loss of one Pedundant filtration Filtration operation filtration unit is unaffected.

Unit Deluge unit System

5) Emergency Inadvertent Loss of one Pedundant pressuriza-Pressuriza- operation pressuriza- tion unit is unaffected tion Unit tion unit Deluge System

6) Hose Inadvertant No effect Each ESF equipment Station operation area is served by a separate drain system.

Sump pumps provide for the removal of water from one hose stream without floating of ESF equipment

These deluge systems are of the automatic remote-manual type.

Amendment 8

GIBBSSAR guestionj 11.19 (3dn The information in Tables 3.11-3 and 3.11-4 are lacking. We must ha ve the information on the environmental conditions for qualification tests for ESF components in order to compete our safety evaluation. When listing the qualification radiation doses, identify the beta and gamma contributions as well as the expected contributions from a DBA condition and from normal operating conditions, as required by Regulatory Guide 1.70, Revision 2.

E2sponse 311,10 8

Qualification test environmental conditions for ESF components, required to function after a DBA, inside and outside containment are listed in revised Tables 3.11-3 and 3.11-4 respectively.

Radiation doses expected during nornal operation are listed in Table 3.11-5.

Q 311-23 Amendment 8

GIPPSSAF TA9t? 3.11-3 (Fbeet 1 of 1)

Environmental Jonditions f or Qualificat ion Tests for Err Companents located Inside Cont airment Integrated Total Test Maximum Ma ximum F ela ti ve Fa3s Doses Tine Pressure Te n.p . Humidity (%) JEadsL_14L_ Duration Eystem Components (psig) (T) (5) Gamma Beta (3ee) pt (5) hotes Containment Sensors 50 300 100 5x107 4x108 105-106 Spray 10.3 (1) , (2) , (6) 50 350 100 8 Hydrocen Heater elements 50 300 100 Fecom.biners 5x107 4x108 105-106 10.6 Containment Sensors & nonitors, 50 300 100 5x107 4x108 Isolation 135- 10* 10.0 (2) , (1) , (6) electr. cables E pene- 50 350 100 5x107 4x108 105-106 trations, valve 10.0 opera tors Feactor Protection steamline flow sensors 50 303 103 5x107 4 x 10 8 135- 105 10.3 ( 1)

Notes: 1. Coniitions are based on LOCA-see Figure 3.11- 1

2. Conditions are based on MSLB-see rigure 3.11-2

3. Table lists maximum pressure and temperature only. For complete history see fiouren refere r.ced above.

4 Fadiation doses are total for entire test time 5< Pumidity and pH are held constant durina the test

6. Where two conditions (1 & 2) are listed botn tests will te per;ormed

mend me nt 8

GIFESSAP I 1 APL E 3.11-4 (Steet 1 of 2)

Environmental Conditions f or Qualificatior Tests for ESF Components Located cutside Containment Irtegrated Tot al ~est Felative Fads Doses Ti mc Pre ssure Temp. Humidit y (1) 1EadaL_14L Duration Syst em components (ps ig) ( F) ( 5) Gamma Beta (Sec) pP (5) Notes Cont ainme nt valve Operators atm 110 0,5 4x10* negli- 135- 10* 7.3 ( 1)

Soray Pump Motors atm 120 103 4x10* gible 105-106 7.0 Instrument Eensors atm 120 95 1x133 negli- 135-10* 7.0 gible Emergency ESF Diesel Generator atm 120 100 1x103 negli- 135-10* 7.0 (1)

Powe r Valve Operators atm 120 103 1x103 gible- 13s- 10* 7.0 Control Panels (local) atm 120 100 1x103 neoli- 105-10' 7.0 gible ESF 6.9kV SWGP atm 104 100 1x103 negli- 105-106 7.0 ESF 4.80kV SWGR atm 104 103 1x103 gible 105-1C* 7.0 8

EST transformers atm 104 100 1x103 negli- 105-10* 7.3 tattery chargers atm 104 100 1x103 oible 105-10* 7.0 inverters atm 104 100 1x103 negli- 10s-tot 7,o batteries atm 80 100 1x103 gible 135-1C* 7.0 Hot Shutdown Panel atm 104 100 1x103 negli- 105-10* 7.0 ESF de SWGR atm 104 100 1x103 gible 105-10* 7.0 ESP ac-de Distrit ution atm 104 100 1x103 neoli- 135-106 7.0 Panels gible ESP Motor Control Centers atm 104 103 1x103 negli- 135-10* 7.0 ESF Aux. Panel Board atm 80 100 1x133 gible 135-106 7.0 Aux. 31dg. ESF Fan Motors atm 104 95 4x10* negli- 105-10* 7.0 Ventilation Instrument sensors atm 104 95 4x10* gible 135-106 7.3 (1)

Auxiliary Pump motor assembly atm 104 103 4x10* negli- 7.0 (1)

Feedwater Sensors atm 104 100 4x10* gible Service Water Valve Operators atm 120 95 1x103 negli- 7.0 (11 Sersors atm 120 95 1x103 gible 7.3 (1)

SG Teedwater Control valve operator atm 100 1x103 negli- 13 0 7.0 (2)

Pump controls atm gible Main Steam Turbine driven AFW Pump 100 1x103 negli- 100 7.0 (2) steam supply valve gible operators a re ndme nt P

GIFESSAF

~ 'J T " 3.11-4 (Sheet 2 of 2)

Environment al Conditions f or Cualificat ion Tests f or ESF Components Located Cut side Containment Integrated Total *est Felative Fads Doses Ti me Pressure Temp. Fumidity (*) JE3d st 14L Duration S yst e m Components (ps ig) (F) (5) Gamma Peta (Sec) pH (5) Not e r.

Sensors 100 1x103 negli- 100 7.0 (2)

Control valve operators gible Component Pump motor atm 100 95 1x10' negli- 105-196 7.0 ( 1)

Cooling Water control Valve Operators atm gible sensors atm 104 95 1x103 negli- 105-10* 7.0 gible Control Foom Control board instruzents atm 80 60 1x103 negli- 7.) (y g and instrument racks reismic Booster Pump atm 104 95 1x13 neali- '0 ( 1)

Category} O O motor assembly, val ve s controls, sensors nible o F-STP Cooling Valve controls, sensors atm 120 100 4x10* negli- 1J6 7.0 (1) gible Hydrogen Pydrogen dettetion atm 120 100 4x10* neoli- 136 Turge 7.' ( 1) , ( 3) aible Note: 1.

ErvironTental conditions listed are assured to be the s3re for either 10CA or MSLP ca=er.

2. Conditions are based on MELE - see Figure 3.11-2

3. systam is NNS, non-ceismic Category I, serving as a t ackup to t he hydrogen recontiner s.

4 Fadiation doses as total for entire test tina

5. Humidity and pH are held constant during the test Amendmen+ 9 O O O

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