ML20072R693
| ML20072R693 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/28/1983 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20072R684 | List: |
| References | |
| NUDOCS 8304060223 | |
| Download: ML20072R693 (2) | |
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NUCLEAR REGULATORY COMMISSION n
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.,E WASMNGTON, D. C. 20855 SAFETY EVALUATION BY THE OFFICE OF NUCLEAR' REACTOR REGULATION SUPPORTING AMENDMENT NO. 91TO ~ FACILITY ~0PERATING LICENSE NO. DPR-56,
PHILADELPHIA ELECTRIC COMPANY PUBLIC SERVICE ELECTRIC AND GAS COMPANY DELMARVA POWER AND LIGHT COMPANY ATLANTIC CITY ELECTRIC COMPANY PEACH BOTTOM ATOMIC POWER' STATION, UNIT NO. 3 DOCKET NO. 50-278 Introduction By letter dated November 19, 1982, as confirmed by app (lication dated the Philadelphia Electric Company PECo or the licensee)
Novenber 23, 1982, made application to an:end the Technical Specifications (TSs) for the Peach Bottom Atomic Power Station, Unit No. 3, to allow for a one-time extension of the seven-day Limiting Condition for Operation (LCO) to 10 days in TS 3.5.A.5 regarding the operability of a Residual Heat Reinoval (RHR) heat exchanger.
Evaluation The low pressure coolant injection (LPCI) system at Peach Bottom Unit No. 3 is divided into two 100% capacity subsystems or " loops". On November 14, 1982, the licensee declared that one loop of the LPCI system was inoperable due to a tube leak in the RHR heat exchanger serving this loop. This action, as specified in TS 3.5.A.5, placed the loop in a seven day LCO mode. The secondary redundant loop, was detennined to be operable. By telecon on November 19, 1982, the licensee requested a three-day extension of the seven-day LCO to November 24,1982.
. We evaluated the ability of the plant to provide minimum engineered safety features (ESF) in the event of a Loss of Coolant Accident (1.0CA), assuming one RHR heat exchanger inoperable, a loss of offsite power and a variety of additional single failures, such as loss of any diesel generators, an additional heat exchanger or pump.
In addition, we evaluated the ability of the plant to safely shut down in the event of a loss of power to both Peach Bottom Units 2 and 3 with.a single failure.
We concluded that a three-day extension of the seven-day LCO with one RHR heat exchanger, out of four, inoperable, and a LOCA occurring durino the interval, with a concurrent loss of offsite power and an additional ~ single failure, would not leave the plant with less than the minimum ESF needed in such an event. We further conclude that the plant, with an RHR heat exchanger inoperable, with an additional single failure and a loss of
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offsite power, would be able to provide sufficient decay heat removal, to both units, to attain a safe shutdown condition.
83'04060223 83'0328 PDR ADOCK 05000278 P
PECo Environmedtal Consideration We have determined that the amendment does not authorize a change in effluent types or total amounts nor an increase in power level and will not result in any significant environmental' impact. Having made this determination, we have further concluded that the amendment
!nvolves an action which is insignificant from the standpoint of environmental impact and, pursuant to 10 CFR 551.5(d)(4), that an environmental impact statement, or negative declaration and environ-mental' impact appraisal need not be prepared in connection with the issuance of this amendment.
Conclusion We have concluded, based on the considerations discussed above, that:
(1) because the amendment does not involve a significant increase in the probability or consequences of an accident previously evaluated, does not create the possibility of an accident of a type different from any evaluated previously, and does not involve a significant reduction in a margin of safety, the amendment does not involve a significant hazards consideration, (2) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, and (3) such activities will be conducted in compliance with the Commission's regulations and the issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.
Dated: MAR 281983 The following NRC personnel have contributed to this Safety Evaluation:
M. Fairtile, G. Holahan, J. T, Beard, f
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