ML19241C185

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Responds to IE Bulletin 79-11 Re Faulty Overcurrent Trip Device in Circuit Breakers.No Westinghouse DB-50 or DB-75 Breakers Are in Use at Facility.Preventive Maint Program Includes Confirmation of Overcurrent Time Delay Protection
ML19241C185
Person / Time
Site: Calvert Cliffs  Constellation icon.png
Issue date: 06/08/1979
From: Lundvall A
BALTIMORE GAS & ELECTRIC CO.
To: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 7907300091
Download: ML19241C185 (1)


Text

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B ALTIMORE G AS AND ELECTRIC C OMPANY P O. BOX 1475 D A LTIV O R E. MARYLAND 212O3

' A T H u n E t U N DV A LL, J R uc r~,et, s..

June 8, 1979 Office of Inspection and Enforcement Docket No. 50-317 U.S. Nuclear Regulatury Commission 50-318 Reaion I 63i Park Avenue King of Prussia, Pennsylvania 19406 Attention: Mr. Boyce H. Grier, Director Gentlemen:

This letter is in reference to I.E.Bulletin 79-11, Faulty Overcurrent Trip Device in Circuit Breakers for Engineerirg Safety Systems.

Investigation of all Westinghouse breaker equipment presently in use at Calvert Cliffs revealed that the DB-50 and 08-75 breakers are not in use at this facility.

Our present Preventive ifaintenarce Program provides for checking all safety-related circuit t.reakers, on a refueling outage frequency, to confinn overcurrent time delay protection.

Should you have further questions regarding this matter, we would be pleased to discuss them with you.

Very trul yours)

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( A. E. Lu!dva}l, Jr.

Vice President - Supply AEL/RDH/dds Copies To: J. A. Biddison, Esquire G. F. Trowbridge, Esquire E. L. Conner, Jr., NRC J. W. Brothers, Bechtel Office of Inspection and Enforcement ,

U.S. Nuclear Regulatory Cormission Washington, D.C. 20555 l Attention: Director, Division of Reactor [7 (}

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