ML20012E858

Suppls Response to NRC Bulletin 88-010,Suppl 1 Re Traceability Reviews on Molded Case Circuit Breakers Installed in safety-related Applications.All Breakers Procured & Installed in Class 1E Equipment Reviewed

ML20012E858
Person / Time
Site:	Vogtle
Issue date:	03/28/1990
From:	Hairston W GEORGIA POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
0295, 295, ELV-01436, ELV-1436, IEB-88-010, IEB-88-10, NUDOCS 9004060455
Download: ML20012E858 (4)

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March 28, 1990 c . 4 .n .m , <, c,+ < ,e W. Q. HairMort, OH ic or V4 e hemir, OMS Neur C8pritho%

Docket Nos. 50-424 50-425 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555 Gentlemen:

V0GTLE ELECTRIC GENERATING PLANT SUPPLEMENTAL RESPONSE TO NRC BULLETIN 88-10 in our letter ELV-01045, dated November 6,1989, Georgia Power Company (GPC) responded to NRC Bulletin 88-10, Supplement 1. In that response, GPC stated the remaining traceability reviews on molded case circuit breakers were scheduled to be completed by January 2, 1990 and a total of approximately 760 breakers were involved.

As the initial review was being completed, correspondence received from ELGAR retracted documentation previously provided to GPC concerning a GE molded case circuit breaker. The breaker was promptly removed from the plant, an acceptable substitute was installed, and the breaker was sent to Wyle Laboratories for testing. GPC was notified that the breaker failed to maintain the closed position for the required two hours when subjected to 100% and 135%

rated current. This constitutes a failure of this portion of the acceptability testing. All other tests of this breaker were acceptable. Since the single GE breaker failed both the traceability review and the electrical test (see item 1 i in the enclosure), the failure rate was 100 percent. Licensees were requested l in " Actions Requested' of Bulletin 88-10 to review those molded case circuit l breakers installed in safety-related applications to verify their traceability, if the test failure rate of untraceable circuit breakers exceeds 10 percent.

Since the failure rate was 100F., all breakers procured and installed in Class IE safety-related equi > ment were subsequently reviewed. This increased the scope of reviews to 1034 areakers. The traceability review of these breakers has now been completed.

l In addition to the ELGAR breaker above, the following breaker problems were r I

identified:

o Two breaker types (a total of five breakers) that were supplied by Brown Boveri were found to be untraceable. One unacceptable type involved four breakers, two of which were found being used in nonsafety-related components and the remaining two were found in stock. The other breaker type (one breaker) was found in stock and placed on hold. These breakers were not tested since they were either used in nonsafety-related components or had not been issued. These are items 2 and 3 in the enclosure.

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, U. S. Nuclear Regulatory Commission ELV-01436 hat _IMO o A breaker supplied by Comsip Delphi did not have an acceptable traceability review. The breaker was found in stock and placed on hold.

This is item 4 in the enclosure, o The review of breakers in safety-related equipment detected two breakers supplied by C&D Battery that had unacceptable traceability. The breakers were subsequently removed and replaced. These breakers are items 5 and 6 in the enclosure.

This letter and enclosure supplements the response originally sent to the NRC on November 6, 1989.

Mr. W. G. Hairston, !!! states that he is a Senior Vice President of Georgia Power Company and is authorized to execute this oath on behalf of Georgia Power Company and that, to the best of his knowledge and belief, the facts set forth in this letter and enclosures are true.

GEORGIA POWER COMPANY By: tO. llAn W. G. Hairston, !!!

Sworn to and subscribed before me this hof 'O[a t <*b , 1990.

/mz, N m N v Notary (fublic ,

WGH,111/PAH/gm Enclosure xc (see next page)

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U. S. Nuclesr Regulatory Commission  !

ELV-01436  !

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i xc: Georaia Power Company Mr. C. K. McCoy Mr. G. Bockhold, Jr.

Mr. R. M. 040m Mr. P. D. Rushton NORMS

0. S. Nuclear Reaulatory Comission Mr. S. D. Ebneter, Regional Administrator Mr. T. A. Reed L Mr.R.F.Aiello,icensingProjectManager,NRRSenior Resident inspector, Vogtle E

l ENCLO$URE LISTING Of MOLDED CASE CIRCULI BREAKER $

WITH UNACCEPTABLE TRACEABILITY Number of litm Manufacture P. O. No. Breakers Model Nos./ Status 1 ELGAR PAV-28054 1 breaker GE model PED 134070, installed, breaker was removed and sent to Wyle, failed test.

2 Brown Boveri PAV-26498 4 breakers ITE model BQlB020, 2 nonsafety-related issues, 2 remain on hold.

3 Brown Boveri PAV-26498 1 breaker ITE model BQlB040, no issues, breaker placed on hold.

4 Comsip Delphi PAV-27449 1 breaker ITE model P1515, no issues, breaker placed on hold.

5 C and D Battery PAV-27493 1 breaker Westinghouse model HKB3175, installed in battery charger 2-1806-B3-CCA, Removed.

6 C and D Battery PAV-29493 1 breaker Westinghouse model HKB3125, installed in battery charger 2-1806-83-CBB, Removed.

TOTAL 9 breakefs with unacceptable traceability TOTAL TRACEABil.!TY REVIEWS 1034