ML18102A338

Part 21 Rept Re Chipping of Latching Mechanism Props Installed in GE 4 Kv magne-blast Circuit Breakers,Type AM-4.16-350-2H.Two Affected Breakers Have Been Returned to Vendor

ML18102A338
Person / Time
Site:	Salem
Issue date:	08/21/1996
From:	Eric Simpson Public Service Enterprise Group
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
REF-PT21-96 LR-N96257, NUDOCS 9608300075
Download: ML18102A338 (2)

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Public Service Electric and Gas Company E. C. Simpson Public .Servjce Electric and Gas Company P.O. Box 236, Hancocks Bridge, NJ 08038 609-339-1700

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Senior Vice President - Nuclear Engineering AUG 21 1996 LR-N96257 United States Nuclear Regulatory commission Document Control Desk Washington, DC 20555 Gentlemen:

10CFR21 INTERIM REPORT, GENERAL ELECTRIC 4 KV MAGNE-BLAST BREAKER LATCHING MECHANISM PROPS SALEM GENERATING STATION UNITS 1 AND 2 FACILITY OPERATING LICENSE NO. DPR-70 AND DPR-75 DOCKET NOS. 50-272 AND 50-311 Pursuant to the notification requirements of 10 CFR 21.21(a) (2),

Public Service Electric and Gas Company (PSE&G) is providing this interim report regarding chipping of latching mechanism props installed in General Electric 4 kV Magne-Blast circuit breakers, Type AM-4.16-350-2H. PSE&G identified this deviation on June 25, 1996.

During 4 kV breaker testing, chipping was observed on the side edge of props in four spare breakers. The prop functions to latch the breaker closed after a closing demand. No prop failures have occurred. However, an evaluation of the effect of the chipping on the structural integrity of the prop has not been completed.

Two of the affected breakers have been returned to the vendor.

The props on these breakers will be removed and will be evaluated metallurgically. The four breakers will not be returned to the plant until the cause for the chipping has been determined and any required corrective actions implemented.

PSE&G's evaluation to date has not identified a substantial safety hazard. The evaluation for reportability in accordance with 16 CFR 21 is scheduled to be completed by October 23, 1996 .

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9608300075 960821 PDR ADOCK 05000272 S PDR

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• Document Control Desk LR-N96257 AUG 21"1996 Should you have any questions, please contact us.

Sincerely, C Mr. H. J. Miller, Administrator - Region I U. s. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 M+. L. N. Olshan, Licensing Project Manager - Salem

u. s. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 14E21 Rockville, MD 20852 Mr. c. Marschall (X24)

USNRC Senior Resident Inspector Mr. K. Tosch, Manager IV Bureau of Nuclear Engineering 33 Arctic Parkway CN 415 Trenton, NJ 08625