ML18092B211
| ML18092B211 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 07/03/1986 |
| From: | Corbin McNeil, Mcveill C Public Service Enterprise Group |
| To: | Varga S Office of Nuclear Reactor Regulation |
| References | |
| TASK-2.K.3.31, TASK-TM GL-83-35, NLR-N86083, NUDOCS 8607140154 | |
| Download: ML18092B211 (3) | |
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Public Service Electric and Gas Company Corbin A. McNeil!, Jr.
Vice President -
Public Service Electric and Gas Company P.O. Box236, Hancocks Bridge, NJ 08038 609 339-4800 Nuclear July 3, 1986 NLR-N86083 Off ice of Nuclear Reactor Regulation United States Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Maryland 20914 Attention:
Mr. Steven A. Varga PWR Project Directorate #3 Division of PWR Licensing -
A
Dear Mr. Varga:
SMALL BREAK LOCA ANALYSIS SALEM GENERATING STATION UNIT NOS. 1 AND 2 DOCKET NOS. 50-272 AND 50-311 Your letter dated June 17, 1985, requested that PSE&G submit Salem specific small break LOCA analysis using the NRC approved NOTRUMP Small Break LOCA (SBLOCA) Evaluation Model (EM), as required by TMI Action Plan Item II.K.3.31.
In Generic Letter 83-35, the NRC staff indicated that the resolution of TMI Action Plan Item II.K.3.31 may be accomplished by generic analyses to demonstrate that the previous NRC approved WFLASH SBLOCA EM results were conservative when compared with the new NOTRUMP SBLOCA EM.
Such generic studies were undertaken by the Westingho~se Owners Group (WOG) of which PSE&G is a participating member.
The WOG has completed these generic studies and has submitted the results of the analyses to the NRC in the topical report WCAP-11145 (L. D. Butterfield letter to J.
Lyons, OG-190, June 11, 1986).
The purpose of this letter is to inform you that PSE&G is referencing topical report WCAP-11145 in order to satisfy the requirements of TMI Action Item II.K.3.31 for Salem Units 1 and 2 in a generic fashion, in accordance with Generic Letter 83-35.
Topical report WCAP-11145 documents the results of a series of Small Break LOCA (SBLOCA) analyses performed with the NRC approved NOTRUMP SBLOCA Evaluation Model.
Cold leg break spectrum analyses were performed for the limiting SBLOCA plant from each of the Westinghouse,4-loop, 4-loop Upper Head Injection
Mr. s. A. Varga 2
7/3/86 (UHI), 3-loop, and 2-loop plant categories.
The limiting SBLOCA plant in each category was defined on the basis of previous SBLOCA analyses which were performed with the NRC approved WFLASH SBLOCA EM.
In addition to the cold leg break spectrums, a hot leg arid pump suction break were performed as part of the 4-loop plant analyses, confirming that the cold leg was still the worst break location.
Comparison of the NOTRUMP cold leg break spectrum results with the previously generated WFLASH results, showed that the WFLASH results were conservative for all plant categories.
In particular, the 4-loop plant category results showed that the NOTRUMP SBLOCA EM calculated a limiting Peak Clad Temperature (PCT) which was 537°F lower than that previously calculated by the WFLASH SBLOCA EM.
The generic results documented in WCAP-11145 demonstrate that a plant specific reanalysis of the 4-loop Salem plants with the NOTRUMP SBLOCA EM would result in the calculation of a limiting PCT which would be significantly lower than the 1472°F PCT currently calculated with the WFLASH SBLOCA EM.
Hence, the WFLASH SBLOCA EM results which currently form the licensing basis for Salem Units 1 and 2 are conservative and still valid for demonstrating the adequacy of the Emergency Core Cooling System to mitigate the consequences of a SBLOCA, as required by 10CFR50.46.
It is therefore concluded that a plant specific analysis is not needed in o:r:der for Salem _to comply with TMI Action Item II.K.3.31.
Rather, PSE&G references WCAP-11145 in order to comply with TMI Action Item II.K.3.31 on a generic basis, in accordance with Generic Letter 83-35.
This should satisfy Item II.K.3.31 of the March 14, 1983, Confirmatory Order of Unit 1 (DPR-70) a*nd Operating License Condition 2.C(25)(o) of Unit 2 (DPR-75).
If you have any questions, please do not hesitate to contact us.
Sincerely,
C Mr. D. C. Fischer Licensing Project Manager Mr. T. J. Kenny Senior Resident Inspector 3