ML20087E056

Proposed Tech Specs Re Allowed out-of-svc Times for Emergency Svc Water Sys

ML20087E056
Person / Time
Site:	Peach Bottom
Issue date:	01/10/1992
From:	PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
Shared Package
ML20087E055	List: ML20087E050 ML20087E056
References
NUDOCS 9201210009
Download: ML20087E056 (11)

Text

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PEACH BOTTOM ATOMIC POWER STATION i UNITS 2 AND 3 Docket Nos, 50-277 50-278 License Nos. DPR-44 DPR-56 TECHNICAL SPECIFICATION CHANGES

. List of Attached Pages Unit-2 Unit 3 221- 221-223' 223 224 224 234 234 235a 235a 1

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920121000p 92oj3o l: r: f,'DR ADOCK 05000277 PDR

.- pa,ge 235a/3 Unit 3

' PBAPS 3.11 =0ASES

] Emergency Heat Sink I

The emergency heat sink is provided as an alternate source of cooling water to the plants in the unlikely event of loss of the normal heat sink (Conowingo Pond) or the maximum credible flood, for the condition of loss of the normal heat sink, the contained volume of water (approximately 3.7 million gallons, ,

which correspohds to a gauge reading of 17') provides a minimum Sf seven days cooling water to both plants for decay heat removal. The testing of the ESW Booster Pumps and the ECW pump is in accordance with existing ASME codes and assures the required availability of the equipment.

C. Emergency Shutdown Control Panels The Emergency Shutdown Control Panels are provided to assure the capability of '

taking the plants to the hot shutdown condition external to the control room for the unlikely condition that the control room becomes uninhabitable.

D. Shock Suppressors (Snubbers) on Safety Related Systems Snubbers are orovided to ensure that the structural integrity of the reactor coolant system and all other safety-related systems are maintained during and following a seismic or other event initiating dynamic loads. Snubbers are designed to prevent unrestrained pipe motion under dynamic loads as might occur during an earthquake or severe transient while allowing normal thermal motion during startup and shutdown. The consequence of an inoperable sndsber is an increase in the probability of structural damage to piping as a result of seismic or other event initiating dynamic loads. It is therefore required that all snubbers necessary to protect the primary coolant system or any other safety system or components be operable during reactor operation.

L Because the snubber protection is required only during low probability events a period of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> is allowed for repairs or replacements. A determined effort will be made to repair the snubber as soon as possible. This allowable repair period is consistent'with the allowable repair items of other safety related components such as RHR pumps, HPCI subsystems, ADS valves and diesel generators ~.

An-engineering analysis must-be performed on supported components when a snubber is determined to be inoperable. The purpose of this analysis is to assure that.the supported components have not been damaged as a result of the snubber-inoperability.

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, page 235a/2 Unit 2 PBAPS 3.11 BASES l Emergency Heat Sink The emergency heat sink is provided as an alternate source of cooling water to the plants in the unlikely event of toss of the normal heat sink (Conowingo Pond) or the maximum credible flood. For the condition of loss of the normal heat sink, the contained volume of water (approximately 3.7 million gallons, which corresponds to a gauge reading of 17') provides a minimum of seven days cooling water to both plants for decay heat reaioval. The testing of the ESW Booster Pumps and the ECW pump is in accordance with existing ASME codes and assures the required availability of the equipment.

C. Emergqncy Shutdc_

.'ontrol Panels The Emergency Shutdown Control Panels are provided to assure the capability of taking the plants to the hot shutdown condition external to the control room for the unlikely condition that the control room becomes uninhabitable.

D. Shock Suppressors (Snubbers) on Safety Related Systems Snubbers are provided to ensure that the structural integrity of the reactor coolant system and all other safety-related systems are maintained during and following a seismic or other event initiating dynamic loads. Snubbers are designed to prevent unrestrained pipe motion under dynamic loads as might occur during an earthquake or severe transient while allowing normal thermal motion during startup and shutdown. The consequence of an inoperable snubber is an increase in the probability of structural damage to piping as a result of seismic or other event initiating dynamic loads, it is therefore required that all snubbers necessary to protect the primary coolant system or any other safety system or components be operable during reactor operation.

Because the snubber protection is required only during low probability events a p'triod of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> is allcwed for repairs or replacements. A determined effort will be made to repair the snubber as soon as possible. This allowable repair period is consistent with the allowable repair items of other safety related components such as RiiR pumps, HPCI subsystems, ADS valves and ditsel generatcrs.

An engineering analysis must be performed on supported components when a snubber is determined to be inoperable. The purpose of this analysis is to assure that the supported components have not been damaged as a result of the snubber inoperability.

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PBAPS

_LIMITlHG CONDITIONS-FOR OPERA 110N- SURVEllLANCE REQUIREMENTS

3.11.A(Cont'rl.) 4.11.A(Cont'd.)

d. A sample of the charcoal -

filter shall be analyzed once.per year to assure halogen removal efficiency of at least of at least 99.5 percent.

2. At least 1 of the 2 main 2. Operability of the main control room intake air radiation control room air intake t

monitors FP-11 be cperable with rv11ation monitors shall be the-inoperto;e channel failed tested every 3 months.

e safe whenever the control room emergency ventilation air supply *genc 'ea' Sink facility, fans and filter trains are requirec to be operable by 3.11.A.1 or  ! (n the emergency ,

filtration of the control room -

f the Emergency ventilation intake air must be &cility shall be initiated. per a nth.

l B._ Emerge 2cy Heat Sink facility- 2. ence a p; the portable fire pump which is used to

.The level in the emergency provide makeup water to the

. l _'. reservoir of. the Emergency lleat emergency ruervoir will be R Sink facility shall not be less checked for operability and than 17'. Should the level- availability. ,

. ' drop below this point.actton shall-be taken to restore- 3a. The' Emergency Cooling Water 1

-the' level to above the minimum, ' pump and ESW booster within 7 days. -pumps shall be tested in

.accordance.with Section XI pergencyShutdownControlPanel

- C, of the ASME Boiler Pressure Vessel Code and applicable 11 At allitimesLwhen not in use addenda, except where relief or being maintained, the has'been granted.

emergency shutdown control panels shall be secured. b. The Emergency Cooling Tower fans shall be tested every three months-to verify operability.

C. ' Emergency Shutdown Control Panei

1. The er:ergency shutdown control

_ panels shall he visually = checked y_ once per week to-verify they are secured.

2. Operability of the switches on the emergency shutdown cnntrol panels shall be tested by electrical check once per refueling outage.

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luije[?34/3 Unit: 2 -

y g PBAPS

' LIMITING CONDI110NS FOR OPERATION SURVEILLANCE REQUIREMENTS 111.A-(Cont'd.) 4.ll.A (Cont'd.)

d. A sample of the charcoa'l filter shall be arelyzed once per year to assure halogen removal offIciency of at least of at least 99.5 percent.

2. At least 1 of the 2 main 2. Operability of the niain P cont d room intuic air r e ation control room air intake enonitors .shallibe operable with radiation monitors shall be .

the Inoperable' channel failed tested every 3 months.

. safe whenever the control room emergency ventilation air supply I 8. Energency lleat Sink facil1_t,y, fans and filter trains are required

to be operable by 3.11.A.1 or 1. The level in the emergency filtration of tne control room j reservoir of the Emergency

. ventilation intake air must be lleat-Sink Facility shall be initiated. . checked once per month.

l B.' Emergency Heat Sink Facility 2. Once a year the portable fire pump which is used to The level in the emergency provide makeup water to tha reservoir-of-the Emergency Heat emergency reservoir will be Sink Facility shall not be less checked for operability and '

than 17'. Should the level availability, drop below this point actlon shall be tuken to restore 3a. The Emergency Cooling Water the level no_above the minimum, pump and ESW booster within 7 days.? pumps shall be tested in accordance with Section XI C.' Emergengy Shutdy n Control Panel of the ASHE Boiler Pressure Vessel Code'and applicable

1. AtLall times when not-in use addenda, except where relief or.being maintained., tna. has been granted, emergency shutdown control- '

panels sh511'be secured, b. The Emergency Cooling Tower fans shall be tested every three

. months to verify operability.

C. Emercency Shutdown Control panel 1; -lhe energency shutdown control panels shall be visually checked once per week to verify they are secured.

2. Operability of the switches on the emergency-shutdown control panels shall be tested by electrical check f

once per refueling outage.

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, pege 224/3 Unit 3 l '

PBAPS

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4.9 B,ASES (Cont'd.)

Periodic tests between refueling outages verify the ability of the diesel generator to run at full load and the core and containment cooling pumps to deliver full flow. Periodic testing of the various components, plus a functional test one-a-cycle, is sufficient to maintain adequate reliabiitty.

Although station batteries will deteriorate with time, utility experience indicates there is almost no possibility of precipitous failure. 1he type of surveillance described in this specification is that which has been demonstrated over the years to provide an indication of a cell becoming irregular or unserviceable long before it becomes a failure, in addition, the checks described also provide adequate indication that the batteries have the specified ampere hour capability.

The station batteries shall be subjected to a performance test every third refueling outage and a service test during the other refueling outages, lhis testing frequency complies with the testing requir m nts of the Institute of Electrical and Electronics Engineers (IEEE) Standard 450 (1975) " Recommended Practice for fialntenance, lesting and Replacement of targe Lead Storage Batteries," and Regulatory Guide 1.129, Revision 1 (February 1978), " Maintenance, Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants."

A performance test determines the ability of the battery to meet a specified discharge rate and duration based on the manufacturer's rating. A service test proves the capability of the battery to deliver the design requirements of the dc systems; i.e., supply and maintain in op"able status all of the actual emergency loads for the design hasis accident. A performance test is the most severe test because the cycling on the battery at manufacturer's rating shortens the service life of the battery. A service test is performed at design load instead of manufacturer's ratings.

The diesel fuel oil quality mutt be checked to ensure proper operation of the diesel generators. Water content should be r:inimized because water in the fuel could cottribute to excessive damage to the diesel engine. Amendment No. 134 centralized commitments related to Position C.2 of Regulatory Guide 1.137, Revision 1 (October, 1979) " Fuel Oil Systems for Standby Diesel Generators".

When it is oetermined that some auxiliary electrical equipment is out-of-service, the increased surveillance required in Section 4.5.f is deemed adequate to provide assurance that the remaining equipment will be operable.

The test interval for the Emergency Service Water System, and pump room fans associated with the ESW pumps is deemed adequate to provide assurance that the equipment will be operable based on good engineering judgment and system redundancy, plus the additional testing accomplhhed when the diesel generators are tested. Pump flow tests during normal operation will be performed by measuring the head and flow in the system using suitable flow equipment and pressure instrumentation.

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, spage-224/2 Unit 2 3 PBAPS l4.9-BASES (Cont'd.)

Periodic tests between refueling outages verify the ability of the diesel generator to run at full load and the core and containment cooling pumps to deliver full flow. Periodic testing of the various components, plus a functional test one-a-cycle,-is sufficient to maintain adequate reliability.

Although station batteries will deteriorate with time, utility experience Indicates there is almost no possibility of precipitous failure. 1he type of surveillance described in this specification is that which has been demonstrated over the years to provide an indication of a cell becoming irregular or unserviceable long before it becomes a failure, in addition, the checks described also provide. adequate indication that the batteries have the specified

, ampere hour capability.

The station batteries shall be subjected to a performance test every third refueling outage and a service test during the other refueling outages. This testing frequency complies with the testing requirements of the Institute of Electrical and Electronics Engineers (IEEE) Standard 450 (1975), "Reconvrended Practice for Maintenance, Testing and Replacement of Large lead Storage Batteries," and Regulatory Guide 1.129, Revision 1 (February 1978), " Maintenance, Testing and Replacement of large lead Storage Batteries for Nuclear Power Plants."

, A performance test determines the ability of the battery to meet a specified discharge rate and duration based on the manufacturer's rating, A service test proves the capability of the battery to deliver the design requirements of the dc

• systems; i.e., supply and maintain in operable status all of the actual emergency loads for the design basis accident. A performance test is the most severe test because the cycling on the battery at manufacturer's rating shortens the service life-of the battery. A service test is performed at design load instead of

-manufacturer's ratings.

The diesel fuel oil quality must be checked to ensure proper operation of the diesel generators. Water content should be minimized because water in the fuel could contribute-to-excessive damage to the diesel engine. AmendmentNo.131 centralized commitments related to Position C.2 of Regulatory Guide 1.137, Revision 1-(October. 1979) " Fuel Oil Systems'for. Standby Diesel Generators".

When it is determined that some auxiliary electrical equipment is out-of-service, the increased surveillance required in Section 4.5.F.is deemed adequate to provide assurance that the remaining equipment will be operable.

The test interval for the Emergency Service Water System, and pump room fans associated with the ESW pumps is deemed adequate to provide assurance that the equipment will be operable based on good engineering judgment and system

-redundancy. plus the additional testing accomplished when the diesel generators are tested. Pump flow tests during normal operation will be performed by .

measuring the head and flow in the system using suitable flow equipment and pressure instrumentation.

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_ _ PBAPS 1 91 BASES'(Cont'd.)_

-The'125-Volt battery system shall-have a minimum of 105 Volts at the battery terminals ~to be considered operable. The 250-Volt portion of the 125/250. Volt battery system shall.have a minimum of 210 Volts at the battery terminals to be considered _ operable.

The ESWS has two_100 percent cooling capacity pumps, each powered frc.m a separate standby power supply. In the event one of the ESW pumps becomes l inoperable the 7 day allowable out of service time is conservative given the probability of an event- requiring the use of both ESW pumps occurring in that

-amount of time. One ESW pump is capable of supplying the entire system. If both-of the ESW pumps become inoperable placing the reactor in a shutdown condition is consistent with the severity of the situation.

4.9 BASES The monthly test of the diesel generator is conducted to check for equipment failures and deterioration. Tetting is conducted up to equilibrium operating conditions to demonstrate proper operation at these conditions. The diesel generator will be manually started, synchronized and connected to the bus and load picked up.- The diesel generator should be loaded to at least 75% of rated load to prevent fouling of the engine. It is expected that the diesel-generator will.be run for one to two hours. Diesel generator experience at other generating stations indicates that-the testing frequency is adequate and provides a high reliability of operation should the system be required.

Each diesel generator has one air compressor and two air receivers for

< starting.. ItLis expected that the air compressors will run onb infrequently.

During;the monthly check of the diesel generator, one receiver in each set of receivers will be drawn down below the point at which the corresponding compressor automatically starts to check operation and the ability of the compressors to recharge the receivers.

The diesel generator fuel consumption rate at full-load is approximately 200 gallons per hour. Thus, the monthly load test ofLthe diesel generators will test the' operation a_nd. the ability of the-fuel oil transfer pumps to refill the day tank-and will check _the operation of these pumps-from the emergency source.

The test of the diesel generator during the refueling _ outage will be more comprehensive in that:it will-functionally test the system; i.e.o it will check diesel generator starting and closure of diesel generator breaker and sequencing of' load.on.the diesel generator. The diesel generator will be.

started by simulation of a loss-of-coolant accident. .In addition, an

-undervoltage condition will be imposed to-simulate _a loss of off-site power.

The' timing-sequence will be checked to assure that the diesel generators can

-operate the LPCI pumps at rated speed within 18 seconds, and the core spray pumps at rated speed within twenty-four seconds.

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P8APS 3,9 BASES (Cont'd.)

The 125-Volt battery system shall have a minimum of 105 Volts at the battery terminals to be considered operable. The 250-Volt portion of the 125/250-Volt battery system shall have a minimum of 210 Volts at the battery terminals to be considered operable.

The ESWS has two 100 percent cooling capacity pumps, each powered from a separate standby power supply. In the event one of the E$W pLmrs become' inoperable the 7 day allowable out of service time is conservathe given the probability of an event requiring the use of both ESW pumps occurring in that amount of time. One ESW pump is capable of supplying the entire system. If both of the ESW pumps become inoperable placing the reactor in a shutdown condition is consistent with the severity of the situation.

4.9 BASES The monthly test of the diesel generator is conducted to check for equipment failures and deterioration. Testing is conducted up to equilibrium operating conditions to elemonstrate proper operation at these conditions. The diesel generator wil be manually started, synchronized and connected to the bus and load picked up. The diesel generator should be loaded to at least 75% of rated load to prevent fouling of the engine. It is expected that the diesel generator will be run for one to two hours. Diesel generator experience at other gentrating stations indicates that the testing frequency is adequate and provides a high rel Ws111ty of operation should the system be required.

Each diesel generator has one air compressor and two air receivers for starting. It is expected that the air compressors will run only infrequently.

During the monthly check of the diesel generator, one receiver in each set of receivers will be drawn down below the point at which the corresponding compressor automatically starts to check operation and the ability of the compressors to recharge the receivers.

The diesel generator fuel consumption rate at full load is approximately 200 gallons per hour. Thus, the monthly load test of the diesel generators will test the operation and the ability of the fuel oil transfer pumps to refill the day tank and will check the operation of these pumps from the emergency source.

The test of the diesel generator during the refueling outage will be more comprehensive in that it will functionally test the system; i.e., it will check diesel generator starting and closure of diesel generator breaker and sequencing of load on the diesel generator, r . diesel generator will be started by' simulation of a loss-of-coolant accident. In addition, an undervoltage condition will be imposed to simulate a loss of off-site power.

The timing sequence will be checked to assure that the diesel generators can operate the LPCI pumps at rated speed within 18 seconds, and the core spray pumps at rated speed within twenty-four seconds.

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,Page 221/3- Unit 3 PBAPS LIMITING CONDITIONS FOR OPERATION SURVElLLANCE REQUlkEMENTS

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3.9.C Emergency Service Water 4.9.C Emergency _ Service Water Sys t_tLn System

1. The Emergency Service Water 1. The ESWS shall be tested System (ESWS) shall be operable once every 3 months as at all times when the reactor follows:

coolant temperature is greater than 212 F. a. Pump operability - '

the pump shall be

2. If one ESW pump becomes manually started and inoperable, the reactor flow capability tested in may remain in operation accordance with the Section for-a period not to XI of the ASME Boiler exceed seven (7) days. If Pressure Vessel Code and this requirement cannot be apolicable addenda except met, an orderly shutdown shall where relief has been be initiated and the reactor granted, shall be placed in the

. cold shutdown condition b. Valve operability -

within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, the automatic valves shall be stroked

3. If two ESW pumps become individually from inoperable, the reactor shall their control switches.

be pit.,;ed in hot shutdown within six (6) hours 2. The associated pump room and in cold shutdown fans shall be tested for within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. operability every 3 months.

4. To consider the ESW pump

3. Each manJal valve and operable the associated- each electric motor pump room fans must be operated valve that is available for normal operation in the system flow except that"a) one pump path and that is not room supply and/or exhhust locked, sealed or fan _for each compartment otherwise secured in may be out of service for position, shall be one month or b) temporary _ verified monthly to be fans may be used in place of in its correct position, permanently installed fans to provide room mperatures at less than_120

4. Once per refuel outage the bottom of the 'B' ESW pump intake structure will be inspected and cleaned as necessary to remove excessive '

silt.

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Page 221/2 Unit 2 3 - se o a

PBAPS L]MITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENIS 3.9.C Emergency Service Water 4.9.C EmergencyJ ervice Water

-System System

1. The Emergency Service Water 1. The ESWS shall be tested System (ESWS) shall be operable once every 3 months as

.at all times when the reactor follows:

coolant temperature is greater than 212 F. a. Pump operability -

the pump shall be j 2. If one ESW pump becomes manually started and inoperable, tbn reactor flow-capability tested.in may remain _in cperation accordance with the Section

'for a period not to XI of the ASME Boiler -

exceed seven (7) days. If Pressure Vessel Code and this requirement cannot be- applicable addenda except met,;an orderly shutdown shall where relief has been be initiated and the. reactor- granted.

Shall be placed.in the cold shutdown condition b. Valve operability -

within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.- the automatic valves shall be stroked

3. If two ESW p' umps become individucily frooi inoperable, the reactor shall their control switches, be placed in hot shutdown within six-(6) hours 2. The associated pump room-and in cold shutdown' fans shall-be tested for within 3' o. hours. operability every 3 months.

J.jTo consider the ESW pump 3. Each manual' valve and operable the associated each electric motor pump room fans must be operated valve-that is available for normal operation in the system flow except that a) one pump ~ . path _ and tilat is not room supply and/cr exhaust- locked, sealed.or fan ~for..-aach compartment otherwise secured in s may be out of service for position shall be

-one_ month or b) temporary verified monthly'to be.

fans ray be used in place of in its correct position.

' permanently installed fans to. provide room mperatures

'at less than 120

4. Once per refuel outage

,' the bottom of theA' ESW pump intoke structure will be inspected and cleaned as necessary to remove _ excessive silt.

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