ML19095A559

Response to IE Bulletin No. 76-06 Concerning Diaphragm Failures

ML19095A559
Person / Time
Site:	Surry
Issue date:	08/19/1976
From:	Stallings C Virginia Electric & Power Co (VEPCO)
To:	Moseley N NRC/RGN-II
References
IEB-76-006, Serial No. 158/072176
Download: ML19095A559 (1)

Text

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e VIRGINIA ELECTRIC AND POWER COMPANY e

RICHMOND, VIRGINIA 23261 August 19, 1976 Mr. Norman C. Moseley, Director Serial No. 158/072176 Office of Inspection and Enforcement PO&M/ALH:clw U.S. Nuclear Regulation Commission Region II - Suite 818 Docket N ~ o - 8 230 Peachtree Street, Northwest 50-28 Atlanta, Georgia 30303 License Nos. -32 DPR-37

Dear Mr. Moseley:

This is in response to IE Bulletin No. 76-06 concerning diaphr_agm failures in air operated auxiliary actuators for safety/relief valves.

The following is a list of our actions regarding the specific requirements of IE Bulletin 76-06.

1. The valves to which IE Bulletin 76-06 applies are the pressurizer and steam generator power operated relief valves. The actuators of these valves have been in-spected and found to have no thermal insulation on them.

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2. Procedures for inspection and disassembly of the affected valves will be modified to assure that diaphr_agms have not deteriorat"ed. These modifi-cations will be completed by September 1; 1976.

3. Information r_egarding diaphragm service and shelf life have.been obtained from the manufacturer.

This information is being factored into station procedures to assure that these limits are not exceeded *

. We will report any unusual findings that result from routine valve actuator maintenance.

Very truly yours, ff:f~~

Vice President-Power Supply and Production Operations*

cc: NRC Office of Inspection and Enforcement Division of Reactor Inspection Programs Washington, D. C. 20555

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