ML19305C386

Provides Commitment to Addl Actions Re Crystal River 800226 Transient.Monitoring & Test Requirements & Correction of Electrical Deficiencies Will Be Completed During 800410 Refueling Outage

ML19305C386
Person / Time
Site:	Davis Besse
Issue date:	03/24/1980
From:	Crouse R TOLEDO EDISON CO.
To:	Reid R Office of Nuclear Reactor Regulation
References
603, NUDOCS 8003280475
Download: ML19305C386 (2)

Text

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TOLEDO EDISON Docket No. 50-346 A.c-ano p caouse License No. NPF-3 [2l?""

Serial No. 603 March 2 4, 19 80 Director of Nuclear Reactor Regulation Attention: Mr. Robert N. Reid, Chief Operating Reactors Branch No. 4 Division of Operating Reactars United States Nuclear Regulatory Commission Washington, D. C. 20555

Dear Mr. Reid:

On March 18, 1980 representatives from your organization, Florida Power Corporation, Babcock & Wilcox (B&W) and all operating licensees owning B&W nuclear steam supply systems met in your offices to discuss the February 26, 1980 transient at Crystal River Unit No. 3. Toledo Edison's letters of March 12 and 17, 1980 (Serial Nos. 596 and 599) responded to your staff's requests documented in your letter of March 6,1980.

This letter provides Toledo "dison's connitment for the Davis-Besse Nuclear Power Station, Unit 1 to additional actions related to the Crystal River Unit No. 3 transient.

Toledo Edison will, within 90 days of this letter, or prior to start-up af ter the scheduled April 10, 19 80 refueling outage, complete the following:

1. Actions which will allow the operator to cope with various combinations of loss of instrumentation and control functions that are caused by a single electrical fault or active failure. This includes changes in (A) equipment and control systems to give clear indications of functions which are lost or unreliable; (B) procedures and training to assure positive and safe manual response by the operator in the event that competent instruments are unavailable.

2. Verification of the effects of various combinations of loss of instru-mentation and control functions by design review analysis and by test.

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8003280 4 7 5 THE TOLEDO EDISON COMPANY EDISON PLAZA 300 MADISON AVENUE TOLEDO. OHlO 43652

Y r Docket No. 50-346 License No. NPF-3 Serial No. 603 March 21,1980 Page Two

-3. Correction of electrical deficiencies which may allow the power operated relief valve and pressurizer spray valve to open on non-nuclear instrumentation power f ailures, such as the event which 4

occurred at Crystal River 3 on February 26, 1980.

Toledo Edison is also doing additional analyses of instrumentation power supply failures to prepare a response to IE Bulletin 79-27.

Very truly yours,

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