ML19336A645

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Responds to IE Bulletins 80-19 & 80-19,Revision 1, Failures of Mercury-Wetted Matrix Relays in Reactor Protective Sys of Operating Nuclear Power Plants Designed by C-E. No Subj Relays Used in Protection Sys
ML19336A645
Person / Time
Site: Humboldt Bay
Issue date: 09/04/1980
From: Crane P
PACIFIC GAS & ELECTRIC CO.
To: Engelken R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
IEB-80-19, NUDOCS 8010300396
Download: ML19336A645 (1)


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Mr.

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Engelken, Director Int / *&uri -

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1990 Nor'h Ca1.ifornia Boulevard Walnut Creek Phza, Suite 202 Walnut Creek, Ct.-lifornia 94596 Re:

Docket No. 50-133 License No. DPR-7

Dear Mr. Engelken:

This is in response to your letters dated July 31, 1 30 and August 15, 1980 which transmitted I.E.

Bulletins Nos. 80-19 and 80-19 Revision 1 con-corning use of mercury-wetted relays in the reactor protection system.

A review has been performed and there are none of the above-mentioned relays in the reactor protection system at Humboldt Bay Power Plant.

It is estimated that approximately 3 :.. e hours have been expended to revic, and respond to the subject bulletin.

4ary truly yours, 7

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Director Office of Inspection and i nforcement Division of Reactor Opera ions Inspection U. 'S. Nuclear Regulatory Commission Washington, D. C. 20555 I

Director Document Management Branch U. S. Nuclear Regulatory Commission Washington, D. C. 20555

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