ML20082B454

Proposed Tech Specs Changing Surveillance Requirements for Emergency Svc Water Sys

ML20082B454
Person / Time
Site:	Peach Bottom
Issue date:	07/02/1991
From:	PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
Shared Package
ML20082B449	List: ML20082B445 ML20082B454
References
NUDOCS 9107150182
Download: ML20082B454 (3)

Text

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PBAPS LIMITING CONDITIONS FOR OPERATION SURVEILLANCE REQUIREMENTS 3.9.C Emergency Service Water 4.9.C Emergency Service 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

2. If two ESW pumps become manually started and inoperable, the reactor flow capability tested may remain in operation in accordance with the for a period not to Section XI of the ASME exceed 1 month. Boiler Pressure Vessel code and applicable addenda except where relief has been granted.

3. To consider the Emergency b. Valve operability -

Cooling Water pump operable the automatic valves as an equivalent ESW pump, shall be stroked at least 1 ESW booster pump individually from and 2 Emergency Cooling Tower their control switches, fans must be operable.

4. To consider the ESW pump 2. The associated pump room operable the associated fans shall be tested for pump room fans must be operability every 3 months.

available for normal operation except that a) one pump .3. a. The Emergency Cooling room supply and/or exhaust Water pump and ESW fan for each compartment booster pumps shall may be out of service for be tested once per one month or b) temporary operating cycle to fans may be used in place of verify operability.

permanently installed fans to provide roam temperatures b. The Emergency Cooling at less than 120 0F, Tower fans shall be tested once per operating cycle to verify operability.

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l Unit 2 PBAPS 4.9 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. The 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 fallure. 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), " Recommended 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. Amendment No. 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 assura,ce that the remaining equipment will be. operable.

The test interval for the Emergency Service Water-System, plus the ESW booster pumps, Emergency Cooling Tower fans, 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 instrumen ation, i

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Unit 3 PBAPS 4,9 DASES'(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. The type of surveillance described in-this specification is that which hcs 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 t.ervice 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), " Recommended Practice for Maintenance, Testing and Replacement of L.arge lead Storage Batteries," and Regulatory Guide 1.129. Revision 1 (February 1978), " Maintenance, lesting and Heplacement of Large lead-Storage Batteries for Nuclear Power Plants."

A performance test determines the "

battery to meet a specified discharge rate and duration based turer's rating. A service test proves the capability of the oatter) . the design requirements of the dc systems; i.e., supply and maintain in opei. 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 ;,erformed at design load instead of '

manufacturer's ratings.

i The diesel fuel oil quality must be checked to ensure proper operation of the l diesel-generators. Water content should be minimized because water in the fuel could contribute 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 determined that some auxiliary electrical equipment is out-of-service.

l 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, plus the ESW booster pumps Emergency Cooling Tower fans, and pump room fans associated with the ESW l' 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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