ML20085A017
| ML20085A017 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/20/1991 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20085A011 | List: |
| References | |
| NUDOCS 9106060083 | |
| Download: ML20085A017 (2) | |
Text
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UNITED STATES 3JW i
NUCLEAR REGULATORY COMMISSION
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SAFETY EVALUATIO!) BY THE OFFICE OF NUCLEAR REACTOR REGUIATION RELATED_T0_ met;DMENT N05.159 A!!D 161 TO FAcillTY OPERATING QCENSEfiOS.DPR-44and,p,PR-M THILADELPHIA ELECTRIC C0!4PANY PUBLIGlRVICE' Ell'tthR~AhB'G/6 C0!iPANY DELMARVE TTUDrXWYitW 'C0k>AW ~-
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PEACl: 00TTOM ATOMIC PCPER STATICth, UNIT NpS.,2,AND 3 DOCKET N05,.,,50,-2,7,1, AND,,59-2,78 1.0 II;TRODUCTION Py letter dated i:ovember 30, 1990, the Philadelphia Electric Company, Public Service Electric & Gas Company, Delmarva Power and Light Company and Atlantic City Electric Company (the licensees) submitted a request for changes to the Peach Bottom Atomic Power Station, Unit flos. 2 and 3, Technical Specifications (TS).
ThE requested changes would revise the emergency diesel generator periodic inspection interval from once per year to once per 18 months.
2.0 EVALUATION The licensee states in its iovember 30, 1990 submittal that the purpose of the requested TS change is in part to provide greater flexibility for completing the tear-down inspection of the emergency diesel generatort (EDGs) during planned station outages and to reduce the probability of a two unit shutdown if the allowed out-of-service tire could not be satisfied. As documented in flRC Combined Inspectien Report 50-277/90-13 and 50-278/90-13, the TS required tear-dcwn insper.tions are quite extensive, require significant disassembly, and require about a 6 day EDG outage. The TS allowed out-of-service time for one EDG is seven days, and failure to return the EDG to service within seven cays would require that both units be placed in shutdown, given that the fcur EDGs at the station are fully shared between both Units 2 and 3.
The requested TS change is consistent with the EDG vendor's recommendations as docurented in the updated vendor manual. Licensee review of plant records indicated that the currently required annual maintenance inspection outage constitutes a~significant portion of each diesel generator's unavailability rate. An extension of the inspection frequency to 18 months should therefore result in increased EDG availability.
In addition, the licensee has implemented a diesel generator parameter trcrding program to identify potential problems from data collected during routine surveillance testing of the EDGs.
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2 The staff I.as reviewed the proposed change in the inspection interval to once per 18 months and find it acceptable based on the consistency of the proposed change with the EDG vendor's recommendations.
In addition, the proposed change will itcidase the likelihocd that the required tear-down inspection of the EDGs will be perfortred with at least one unit in a shutdown condition.
3.0, STATE CONSUL 1ATION 4
in accordance with the Commission's regulations, the Pennsylvania State official was notified of the proposed issuance of the amendments.
The State official had no corr.ents.
4.0 EhVIRONi1EllTAL CCNSIDERATION The er'endments char.ge a requirerrent with respect to installation or use of a facility component located within the restricted area as defined in 10 CFR Part 20. The NPC staff has determined that the amendments ir.vc1ve no significant increase in the amounts, and no significant change in the types, cf any effluents that may be released effsite, and that there is no significant increase in individual or cumulative occupational radiation exposure. The Commission has previously issued a proposed finding that the at:.endments involve no significant-hazards consideration, and there has been no public content on such finding. Accordingly, the amendrtents racet the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9).
Pursuant to 10 CFR 51.22(b) no environmental impact statement or environmental assessment need be prepared in connection with the issuance of the amendments.
5.0 CONCLUSION
The Comission has concluded, based on the considerations discussed above, that:
(1) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the ptoposed manner, (2) such activities will be conducted in compliance with the Comission's regulations, and (3) the issuance of the emendments will not be inimical to the common defense and security or to the health and safety of the public.
Principal Contributor:
Gene Y. Suh Date: May 20, 191 l
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