ML20137Q386
| ML20137Q386 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 11/13/1985 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| NUDOCS 8512050262 | |
| Download: ML20137Q386 (3) | |
Text
I November 13, 1985 ggf(
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Dockets Nos. 50-277 and 50-278 Mr. John S. Kemper Vice President, Engineering and Research Philadelphia Electric Company 2301 Market Street Philadelphia, Pennsylvania 19101
Dear Mr. Kemper:
SUBJECT:
USE OF ENERGY ABSORBERS AS REPLACEMENT FOR SNUBBERS Re: Peach Bottom Atomic Power Station, Units 2 and 3 By letter dated July 25, 1985, the Philadelphia Electric Company (PECo or the licensee) provided to the staff certain information concerning the use of energy absorbers to reduce the use of snubbers at Peach Bottom, Units 2 and 3.
Your letter represents a follow-up to a meeting held on May 30, 1985 during which PECo and the Bechtel Corporation provided a technical presentation on energy absorbers to the NRC staff (Meeting Summary dated July 24, 1985).
In your July 25, 1985 letter, there is mention of the possibility of installing energy absorbers at Peach Bottom under the provisions of 10 CFR 50.59(a). To this point, we wish to make the following comments based upon a limited review of the technical bases for the use of energy absorbers as snubber replacements provided in your July 25, 1985 letter:
1.
Elimination of snubbers and replacment with energy absorbers would involve a change in the Technical Specifications in the opinion of the NRC staff.
2.
The number and location of the energy absorbers in a given piping system would be determined by the use of a non-linear computer program together with the structural hysteretic properties of the absorbers.
Neither of these features have been reviewed in detail by the staff and found to be acceptable.
3.
The proposed replacement of snubbers with energy absorbers in a previously analyzed safety system could result in a potential decrease in the margin of safety. The reanalysis and verification of adequate safety margins concerning snubber replacement represent a potential unreviewed safety question in the opinion of the NRC staff, maggggj!gggg;7 g
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Mr. John S. Kemper This completes our response to certain questions raised during the May 30, 1985 meeting as well as your July 25, 1985 letter.
If you have any further questions, please contact your NRR Project Manager, G. Gears (301-492-8362).
i Sincerely,
'G.G G:M 3xcm:p yg JCssi 7. m.,
John F. Stolz, Chief Operating Reactors Branch #4 Division of Licensing cc: See next page (DISTRJRtlTTONDocket File ]Partlow HRC fur ACRS-10 L PDR Ringran ORB #4 Rdg GGears HThompson Gray File OELD BGallo, R:I EJordan BGrimes llz &
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Mr. E. G. Bauer, Jr.
Peach Bottom Atomic Power Station, Philadelphia Electric Company Units 2 and 3 cc:
Mr. Eugene J. Bradley Mr. R. A. Heiss, Coordinator Assistant General Counsel Pennsylvania State Clearinghouse Philadelphia Electric Company Governor's Office of State Planning 2301 Market Street and Development Philadelphia, Pennsylvania 19101 P.O. Box 1323 Harrisburg, Pennsylvania 17120 Troy B. Conner, Jr., Esq.
1747 Pennsylvania Avenue, N.W.
Mr. Thomas M. Gerusky, Director Washington, D.C.
20006 Bureau of Radiation Protection Pennsylvania Department of Thomas A. Deming, Esq.
Environmental Resources Assistant Attorney General P.O. Box 2063 Department of Natural Resources Harrisburg, Pennsylvania 17120 Annapolis, Maryland 21401 Mr. Albert R. Steel Chairman Philadelphia Electric Company Board of Supervisors ATTN: Mr. R. Fleishmann Peach Bottom Township Peach Bottom Atomic R. D. #1 Power Station Delta, Pennsylvania 17314 Delta, Pennsylvania 17314 Mr. M. J. Cooney, Superinter.dsnt Generation Division - bclear Philadelphia Electric Company 2301 Market Street Philadelphia, Pennsylvania 19101 Mr. Anthony J. Pietrofitta, General Manager Power Production Engineering Atlantic Electric P. O. Box 1500 1199 Black Horse Pike Pleasantville, New Jersey 08232 Resident Inspector U.S. Nuclear Regulatory Comission Peach Bottom Atomic Power Station P.O. Box 399 Delta, Pennsylvania 17314 P.egional Administrator, Region i U.S. Nuclear Regulatory Comission 631 Park Avenue King of Prussia, Pennsylvania 19406 i
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