ML20004B598

Responds to IE Bulletin 79-01B Re Namco Limit Switches. Prototype Design Being Developed.Limit Switch Sealing Scheduled for First Outage Following Design Completion

ML20004B598
Person / Time
Site:	Beaver Valley
Issue date:	04/28/1981
From:	Dunn C DUQUESNE LIGHT CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
IEB-79-01B, IEB-79-1B, TAC-42459, NUDOCS 8105290141
Download: ML20004B598 (1)

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April 28, 1981

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United States Nuclear Regulatory Commission O'

Office of Inspection and Enforcement Attn:

Boyce H. Grier, Regional Director

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Reference:

Beaver Valley Power Station, Unit No. 1

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Docket No. 50-334, License No. DPR-66 IE Bulletin 79-01B Gentlemen:

This is to inform you of the status of our investigating a method of sealing NAMCO limit switches. We will be unable to fully develop and qualify our design for sealing NAMCO limit switches for installation during the May autage.

At this time a prototype design is being developed for testing under the supervision of Stone & Webster Engineering Corporation. Testing is scheduled to take place during the period of May 7 through June 23, 1981.

Following the testing and analysis of the test results, final design and installation procedures will be developed.

It is expected that the design, procedures and material will be available by August 20, 1981.

Actual sealing will then be scheduled for the first scheduled outage of sufficient duration following the completion of the necessary design, testing and procurement activities.

Very truly yours, C. N. Dunn Vice President, Operatiens O

8105 2j 0

Beaver Valley Power Station, Unit No. 1 Docket No, 50-334, License No. DPR-66 IE Bulletin 79-OlB Page 2 cc:

D. A. Beckman, Resident Inspector United States Nuclear Regulatory Commission Beaver Valley Power Station Shippingport, PA 15077 United States Nuclear Regulatory Commission c/o Document Management Branch Washington, DC 20555 U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Division of Reactor Inspections Operation Washington, DC 20555 Director of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Attn:

Mr. Steven A. Varga, Chief Operating Reactors Branch No. 1 Division of Licensing Washington, DC 20555 i

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