ML19330C398

Proposed Tech Specs,Revision Sections 3.14 & 4.16 Re Fire Detection & Protection Sys

ML19330C398
Person / Time
Site:	Prairie Island
Issue date:	07/31/1980
From:	NORTHERN STATES POWER CO.
To:
Shared Package
ML19330C389	List: ML19330C388 ML19330C393 ML19330C398
References
TAC-11094, TAC-11095, NUDOCS 8008080323
Download: ML19330C398 (15)

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(s) EXHIBIT A Prairie Island Nuclear Generating Plant License Amendment Request dated July 31, 1980 Proposed Changes te the Technical Specifications Appendix A of Operating Licenses DPR-42 and DPR-60 Pursuant to 10 CFR 50.59, the holders of Operating Licenses DPR-42 and DPR-60 hereby propose the following changes to Appendix A, Technical Specifications:

Fire Detection and Protection Systems PROPOSED CHANGE Revise sections 3.14 and 4.16 of the Prairie Island Technical Specifictions to include the procedural changes and the facility modifications required by the Fire Protection Safety Evaluation issued by the NRC Staff on Sep-tember 6,1979. Refer to Exhibit B, pages 3.14-1 through 3.14-6, Table 3.14-1, and pages 4.16-2 through 4.16-6.

REASON FOR CHANGE These changes reflect the procedural changes and the additional fire detection and protection equipment installed as a result of NRC review of the Prairie Island plant. Minor corrections and clarifications to the existing fire protection requirements are also included.

All changes are based on the format and content of Sections 3/4.3.3.8.1, 3/4.7.11, and 3/4.7.12 of 'the Standard Technical Specification for Westing-house Pressurized Water Reactors, NUREG-0452.

SAFETY EVALUATION This change adds additional requirements to the Technical Specifications for those equipment additions and procedural changes required by the NRC Staff in their review of the fire protection program at the Prairie Island plant. Existing Technical Specification Requirements are not affected by these additional requirements.

The proposed revision provides assurance that the additional equipment and procedural changes required by the Commission will be ef fectively implemented.

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e .o EXHIBIT B License Amendment Request dated July 31, 1980 Docket Nos. 50-282 License Nos. DPR-42 50-306 DPR-60 ,

Exhibit B consists of revised pages for the Prairie Island Nuclear Generating Plant Technical Specifica-tions, Appendix A, as listed below showing the pro-posed changes:

TS.3.14-1 TS.3.14-2 TS.3.14-3 TS.3.14-4 TS.3.14-5 '<

TS.3.14.6 Table TS.3.14-1 (pg 1 of 3)

Table TS.3.14-1 (pg 2 of 3)

Table -TS.3.14-1 (pg 3 of 3)

TS.4.16-2 TS.4.16-3 TS.4'.16-4 TS.4.16-5 TS.4.16-6 (new page) i e

e. io TS.3.14-1 REV 3.14 ' FIRE DETECTION ' AND PROTECTION SYSTEMS Applicability-Applies to instrumentation and plant systems used for fire detection and protection of the nuclear safety-related structures, systems, and components of the plant..

LObjective

.To. insure that the structures, systems, and components of the plant important to nuclear safety are protected from fire damage.

Specification A. Fire Detection Instrumentation 1.. Except as'specified below, the minimum fire detection instrumentation fo'r each fire detection zone shown in Table 3.14-1 shall be operable whenever equipment in that fire detection zone is required to be operable. Fire detection instruments located within containment are not required to be operable during the performance of Type A containment leakage rate tests.

2. If Specification 3.14.A.1 cannot be met:

-a. Within one hour, establish a fire watch patrol to inspect the zone with the inoperable instruments at least once per hour.

Fire zones located inside primary containment are exempt from this requirement when containment integrity is required.

b. Restore the inoperable instruments to operable status within 14 days or submit a 30-day written report outlining the cause of the malfunction and .the plans for restoring the instruments to operable status.

B. Fire Suppression Water System

1. Except as'specified in 3.14.B.2 or 3.14.B.3 below, the system shall be operable at all _ times with:

a. . The- following pumps, including automatic initiation logic, operable and capable ~of delivering at least 2000 gpm at a- discharge pressure of 108 psig.

1. Diesel-driven fire pump

2. Motor-driven fire pump

3. : Screen wash pump

e o TS.3.14-2 REV

b. An operable flow path capable of taking suction from the river and transferring the water through distribution piping with operable sectionalizing control or isolation valves to the yard hydrant valves and the first. valve ahead of each deluge valve, hose station, or sprinkler system required to be operable.

2. With one of the pumps required by Specification 3.14.B.1.a inoperable, restore the inoperable equipment to operable status within seven days or provide a 30-day written report outlining the plans and procedures to be used to provide for the loss of redundancy in the Fire Suppression Water system. With an inoperable fire pump, perform the surveillance required by Specification 4.16.B.2.

3. With the fire suppression water system otherwise inoperable:

4. Establish a backup Fire Suppression Wacer System within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />,

b. Provide prompt notification with a written followup report outlining the actions caken and the plans and schedule for restoring the system to operable status,

c. If Specification 3.14.B.3.a cannot be met, the reactors shall be placed in hot standby within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in cold shutdown within 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

C. Spray and sprinkler Systems

1. Whenever equipment protected by the following spray and sprinkler systems is required to be operable, the spray and sprinkler system shall be operable:

a. Auxiliary Feed Pump Room WP-10

b. Diesel Generator Areas PA-1

c. Unit No. 1 Electrical Penetration Area PA-3

d. Unit No. 1 Electrical Penetration Area PA-4

e. Unit No. 2 Electrical Penetration Area PA-6

f. Unit No. 2 Electrical Penetration Area PA-7

g. Screenhouse PA-9

2. If Specification 3.14.C.1 cannot be met, a continuous fire watch with backup fire suppression equipment shall be established within one hour. Restore inoperable spray and sprinkler systems to operable status within 14 days or submit a 30-day written report outlining the cause of inoperability and the plans for restoring the system to operable status.

o TS.3.14-3 REV D. Carbon Dioxide System

1. Except as specified in 3.14.D.3 below, the CO2 system protecting i

the relay and cable spreading room area shall be operable with a minimum level of 60% in the CO 2 st rage tank.

2. During those periods when the relay and cable- spreading room area is normally occupied, automatic initiation of the CO system 2

may be bypassed. During those periods when the area is normally unoccupied,theC0fsystemshallbecapableofautomaticinitiation unless there are personnel actually in the area.

3. If specification 3.14.D.1 cannot be met, a continuous fire watch 4

with backup fire suppression equipment shall be stationed in the relay and cable spreading room within one hour. Restore the system to operable status within 14 days or submit a 30-day written report outlining the cause of inoperability and the plans for restoring the system to operable status.

E. Fire Hose Stations

1. Whenever equipment protected by hose stations in the following areas is required to be operable, the hose station (s) protecting that area shall be operable:

a. Diesel Generator Rooms l b. Safety Related Switchgear Rooms

c. Safety Related Area,s of Screenhouse d; Auxiliary Building

.e. Control Room

f. ' Relay & Cable Spreading Room

g. Battery Rooms

h. Auxiliary Feed Fump Room

2. If Specification 3.14.E.1 cannot be met, within one hour hoses supplied 4

fec operable hose stations shall be made available for routing to eacts area with an inoperable hose station.

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• O TS.3.14-4 REV F. Yard Hydant Hose Houses i

1. - Whenever equipment in the following buildings is required to be operable, the yard hydrant hose houses in the main yard loop adjacent to each building shall be operable:

a. Unit No. 1 Reactor Building

b. Unit No. 2 Reactor Building

c. Turbine Building

d. Auxiliary Building

e. Screen house

2. If Specification 3.14.F.1 cannot be met, within one hour have sufficient additional lengths of 2-1/2 inch diameter hose located in adjacent operable yard hydrant hose house (s) to provide service to the unprotected area (s).

G. Penetration Fire Barriers

1. All penetration fire barriers in fire crea boundaries protecting equipment required to be operable shall be operable.

2. If Specification 3.14.G.1 cannot be met, a continuous fire watch l shall be-established on at least one side of the af fected penetra-tion (s) within one hour.

e o TS.3.14-5 REV Basis Ionization, photoelectric, and thermal type fire detectors are located throughout safety related structures. These detectors sense the products l of combustion during the very early stages of a fire or the heat emitted by a fire. The detectors in each area initiate an alarm in the control room.

The specifications require a minimum number of detectors to be operable in each area. If. this number is not operable, except for fire detectors located in primary containment, a patrolling fire watch is established in the af fected area.

If an area is found to have an inoperable detector, the alarm for the af fected zone may be bypassed while the detector is being repaired.

Primary containment detectors are unique since (1) they are inacessible during normal operation, and (2) no significant fire hazard exists inside containment during normal operation. Inoperable fire detectors located inside containment will be repaired during the first scheduled outage following discovery. Safety related fire detection instruments are listed in Table TS.3.14.1.

The fire suppression water system is supplied from the Mississippi River by two horizontal centrifugal fire pumps rated at 2000 gpm at 120 psig. One pump is motor driven and the other pump is diesal driven. A third pump also rated at 2000 gpm at 129 psig, is assigned to the screen wash system, and serves as a backup to the fire suppression water system. Header pressure is maintained between 108 and 113 psig by a jockey fire pump. If the water demand is such that the jockey pump cannot maintain the header pressure, the screen wash pump will start (if not running) and the screen wash to fire header bypass valve will open at 102 psig. The bypass line is orificed to restrict flow to 450 gpm. On further demand, the motor driven fire pump will automatically start at 95 psig. If further demand of water is called for and the header pressure drops to 90 psig, the diesel driven fire pump will start. Pumps are designed to pump 2000 gpm and maintain a minimum of 65 psig in the fire header, measured at the highest point in the system. The screen wash pump may be directly aligned to the fire header by manual action from the control room. Any one fire pump, or the screen wash pump, can be used to supply all fire fighting water requirements. In the event that a pump is inoperable, up to seven days are allowed to restore the pump to operability or a report must be submitted to the Commission explaining the circumstances. If all pumps are inoperable, or if the fire suppression water system is incapable of supplying water to a safety related a rea, a backup fire suppression water system must be established within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to permit continued plant operation and the Commission must be informed.

The cooling water system, also supplied by the Mississippi River, provides additional redundancy to the fire suppression water system. Crossover water supplies from the cooling water system to the fire protection system are provided for the safety related areas.

TS.3.14-6 REV Basis'(contfaued)

' Water deluge or wet pipe sprinkler systems are provided in safety related areas where a significant fire hazard exists, .except for the relay and cable spreading room. Due to the nature of the equipment in the relay and cable spreading area,' a carbon dioxide system is provided. Whenever a deluge or sprinkler system is inoperable, a continuous fire watch with backup-fire suppression equipment available is stationed in the area entil operability is restored. Whenever the relay and cable spreading room carbon dioxide systems becomes inoperable, up to 14 days are allowed to complete maintenance. If the system cannot be restored to operable status within this time period, a report outlining the situation is submitted to the Commission. 'Whenever the carbon dioxide system is inoperable, a continuous fire watch

with ' backup fire suppression equipment is stationed in the room.

-Since the relay and cable spreading area is occupied during normal working

hours, the automatic initiation feature of the CO system is bypassed 2

during this period and whenever entry is made during other times. The system-is. initiated manually in the event fire is detected when the room is occupied.

In' addition to deluge and' sprinkler systems, hydrant hose houses are located in the~ yard and hose stations are located throughout the plant.

These hose stations provided primary and backup protection for safety related systems and compenents. Normally all yard hydrant hose houses and hose stations are operable when a reactor is above cold shutdown. If a hose house or station protecting safety related equipment becomes inoperable,

. additional hose must be available for ' routing to the unprotected area.

This _. hose may be supplied .from an operable hydrant hose house, hose statio~n, or~ brigade locker.

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Piping and electrical penetrations are provided with seals.where required by the fire severity. It a seal is made or found to be inoperable for any

' reason, . the penetration area. is continuously attended until an ef fective fire seal is restored. Seals have been qualified for the maximum fire severity 'present cnt either side of the barrier.

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s, .O TABLE TS.3.14-1 (Pg 1 of 3)

REV TABLE TS.3.14-1 SAFETY RELATED FIRE DETECTION INSTRUMENTS MINIMUM TOTAL NO.

ZONE NO. LOCATION TYPE OF DETECTOR NO REQUIRED INSTALLED 1 Battery Rooms Ion 2 2 2 Air compressor & Ion, 2 9 Auxiliary Feed Thermal 0 3 Pump Area 6 D-2 Diesel Generator Ion, 2 3 Room Flame 0 1

'8 Auxiliary Building, Ion, 10 46 Unit No. 1, Ground Smoke 0 1 Floor Thermal 0 2 10 Reactor Building, Ion, 2 18 Unit No. 1, Ground Smoke 0 1 Floor 11 Bus 15 & 16 Switch- Ion 2 6 gear Rooms 12 Relay & Cable Ion 8 17 Spreading Room 14 Computer Room Ion 2 4 19 Auxiliary Building, Unit No. 1, Mezzanine Ion 5 31

-20 Reactor Building, Ion 4 15 Unit No. 1, Mezzanine 21 Reactor Building, Ion, 2 12 Unit No. 1 Annulus Flame 0 4

. Mezzanine 26 Bus 110 & 120 Switch- Ion 2 2 gear Rooms 28 Auxiliary Building, Ion 2 1.5 Unit No. 1, Operating Floor 29 Reactor Building, Ion 2 14 <

Unit No. 1, Operating Floor j l

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o c TABLE TS.3.14-1 (pg 2 of 3)

REV TABLE TS.3.14-1 (CONTINUED)

SAFETY RELATED FIRE DETECTION INSTRUMENTS ZONE NO. LOCATION MINLMUM TOTAL NO.

TYPE OF DETECTOR NO REQUIRED INSTALLED 30 Auxiliary Building, Ion 7 28 Unit No. 1, Fan Deck

• 31 Control Room Chiller Ion 2 Unit Room 6 32 Reactor Building, Ion 2 4 Unit No. 1, Fan Floor 33- Spent Fuel Handling Ion 4 13 Area 35 Battery Rooms Ion 2 2 40 Auxiliary Building, Ion 5 Unit No. 2, Ground 14

' Floor 42 Reactor Building, Ion, 2 16 Unit No. 2, Groung Smoke Flcor 0 1 43 Bus 25 & 26 Switch- Ion 2 6 gear Rooms 46 Auxiliary Building, Ion 5 Unit No. 2, Mezzanine- 22 47 Reactor Building, Ion 2 12 Unit No. 2, Annulus, Flame 0 Mezzanine 4 50 Bus 210 & 220 Switch- Ion 2 2 gear Rooms 51 Auxiliary Building Ion 1 10 Unit No. 2, Operating Floor

52. Reactor Building,-

t Ion 3 14-Unit No. 2, . Operating Floor l

53- Auxiliary Building, Ion 3 l

Unit No. 2, Fan Deck 23 54 .;aactor Building, Ion 2 4

~ Unit No. 2, Fan Deck 56 Reactor Building, Ion 4 Unit No. 2, Mezzanine- 15

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' TABLE TS.3.14-1 (pg 3 of 3)

, . REV' MINIMUM TOTAL'NO.

ZONE NO'. LOCATION TYPE OF DETECTOR NO REQUIRED INSTALLED 57 Control Room Ion 7 30

74. 'Screenhouse, Ground Floor Ion 1 11 75 Screenhouse, Operating Floor- Ion 2 20 i

82 D-1 Diesel Generator-Room Ion, 2 3 Flame 0 1 1

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2 The motor-driven' fire pump shall be. started every month -and

run for at least- 15 minutes on recirculation flow.

c. The -diesel-driven fire pump shall be started every month ,

from ambient conditions and run for at least 20 minutes i on recirculation' flow.

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d. Th'e level in1the diesel-driven fire pump fuel storage tank shall be checked every month and verified to contain at least -

, 500 gallons of fuel.

e. Every three months' verify that a sample of fuel from the

~ diesel-driven fire pump fuel storage tank is within the accept-able limits specified in Table 1 of ASTM D975-68 when checked

for viscosity, water and sediment..

f.- Every 18 months subject the diesel-driven fire pump engine to 1

an inspection in accordance with procedures prepared in conjunc-tion with the manufacturer's recommendations for this class of standby nervice.

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g. A simulated automatic actuation of each fire pump and the screen

- wash pump, including verification of pump capability, shall be conducted every 18 months.

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h. The header syst'em shall be flushed every 12 months.

System flow tests shall be ' performed every three years.

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4 i 'j. Valves- , flow paths supplying fire suppression water to safety related stru'ctures, systems, and components shall be cycled every 12 months.

k. Each' valve (manual, power operated, or automatic) in the flow path for safety-related areas and areas posing a fire haza.rd to safety-related areas, shall be verified to be in its correct position every month and the method of securing the valve in its correct- position shall be verified every month.

. 2. When it is determined that one of the two fire pumps required by-specification 3.14.B.1.a is ' inoperable, the remaining operable fire pump shall be started daily and run for at least 15 minutes (motor driven pump),or 20 minutes (diesel driven pump) on recirculation flow until specifi' cation 3.14.B.1.a can be met.

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+ e TS.4.16-3 REV C.. Spray and Sprinkler Systems Each spray and sprinkler system specified in 1.14.C.1 shall be

' demonstrated operable by performing a nozzle inspection and system functional test, which includes simulated automatic actuation of the system, every 18 months.

D. Carbon Dioxide System The relay and cable spreading room carbon dioxide system shall be demonstrated operable by the following actions:

1. -Verify CO2 storage tank level and pressure every week.

2. Verify.that the system is operable by performing a system functional test which includes simulated automatic actuation of the system every 18 months and a puff test every three years.

E. Fire Hose Stations The fire hose stations specified in 3.14.E.1 shall be demonstrated oper-able as follows:

1. Each month a visual inspection shall be conducted to assure all equipment is available.

2. Every 18 months the hose shall be removed for inspection and re-racking and all gaskets in the couplings shall be inspected and replaced if necessary.

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3. Every three years, partially open each hose station valve to verify valve operability and no blockage.

4. Every three years each hose shall be hydrostatically tested at a pressure at least 50 psig greater than the maximum pressure available at that hose station.

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o .w TS.4.16-4 REV F. Yard Hydrant Hose Houses The yard hydrant hose houses specified in 3.14.F.1 shall be demonstrated operable as follows:

1. Each month a visual inspection shall be conducted of the yard hydrant hose houses to assure all required equipment is available.

2. Every six months (in the spring and f all) visually inspect each yard fire hydrant and verify that the hydrant barrel is dry and that-the hydrant is not damaged.

3. Every year conduct a hose hydrostatic test at a pressure. at least 50 psig greater. than the maximum pressure available at any yard hydrant hose house and conduct an. inspection of all gaskets in the couplings. All degraded gaskets shall be replaced.

G. Penetration Fire Barriers Penetratien fire barriers in fire area boundaries protecting safety related equipment shall be demonstrated operable as follows:

1. A visual inspection of fire barrier penetration fire barriers shall be conducted every 18 months.

2. Following repair or maintenance of a penetration fire barrier a visual inspection of the real shall' be conducted.

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-4 9 y TS.4.16-5 REV Basis The minimum number of fire detectors required to be operable in each fire zone are functionally tested following the manufacturer's _ recommendations each six months, except' for those located inside the primary containment which are tested each 18 months. These tests are performed by the plant

' staff, _ Other fire detectors will .be tested at an interval which experience has'shown1 to be necessary to assure reliable operation. Every six months an alarm circuit check is performed. This check can be performed in

. conjunction with detector functional tests. All circuitry is also provided

-with automatic supervision for opens and ground f aults.

i Fire pumps are tested each month to verify operability. Test starting of L

the screen wash pump is not . required since it is normally in service. Each fire pump.is manually started and operated for at least 15 or 20 minutes with pumpL flow directed through the recirculation test line. Every 18 months the operability of the automatic actuation logic for the fire pumps and the screen wash pump is verified and the performance of each pump is verified to meet system requirements. The specified flush and. valve lineup check provide assurance that the piping' system is capable of supplying fire suppression water to all safety related areas. When one of the fire pumps is inoperable the operable fire pump is started daily to verify operability until.both fire pumps are once again available.

Fire suppression water system flow tests will be done at least every three years to verify hydraulic performance. The testing will be performed using Section 11, Chapter 5 of the Fire Protection Handbook, 14th Edition, as a procedura1' guide. The test is generally performed in conjunction with insurance inspections.

Surveillance specified for each spray and sprinkler system is intended to assure that the systems will function as designed when they are needed.

d Functional tests are conducted at 18 month intervals on those systems provided with test facilities.

The testing specified for the relay and cable screading room CO2 system l provides assurance that the CO 2 invent ry is adequate to extinguish a fire in this- area and that the system is capable of automatic actuation.

Hose stations and yard hydrant hose houses are inspected monthly to verify that- all required equipment is in place. Gaskets in hose couplings are inspected periodically and the hose is pressure tested. Pressure testing of outdoor hose is conducted more frequently than indoor h'ose~because of the less favorable storage conditions. Operability of hose station isolation valves is verified every three years by partially opening each valve to verify. flow. All of these tests provide a high degree of assurance that 1

- each hose station will perform satisfactorily after periods of standby

service.

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.o TS.4.16-6 REV Plant fire barrier . walls are provided with seals for pipes and cables where necessary. . Where such seals are installed, they must be maintained intact to perform their function. Visual inspection of each installed seal is required every 18 months and, af ter seal repair. A visual inspection following-repair of a seal in the secondary containment boundary is sufficient

- to assure that seal leakage will be within acceptable limits.

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