ML20027D209

Requests Confirmation That Diesel Generator Starting During Maint Is Prevented by Closing Manual Valves in Air & Fuel Supply & That Valves Are Included in Locked Valve Procedure & Entered in Valve Log

ML20027D209
Person / Time
Site:	Davis Besse
Issue date:	10/07/1982
From:	Stolz J Office of Nuclear Reactor Regulation
To:	Crouse R TOLEDO EDISON CO.
References
NUDOCS 8211030131
Download: ML20027D209 (3)

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L PDR Docket No. 50-346 ACRS-10 Gray File H0rns tein EBlackwood Mr. Richard P. Crouse Vice President, Nuclear Toledo Edison Company Edison Plaza - Stop 712 300 Madison Avenue Toledo, Ohio 43652

SUBJECT:

DIESEL-GENERATOR LOCK 0UT By letter dated Septenber 2,1977 we requested that you review the alann and control circuitry for the diesel-generators at Davis-Besse, and provide us with infonnation concerning conditions that may render the diesel-generators incapable of automatic starting. We also requested infonnation regarding control mon annunciation of these and other diesel-generator status or tmuble conditions. Your letter of October 27, 1977 responded to our request.

Our letter of March 6,1979 presented three staff positions that were developed as a result of our review of your October 27,1977 (No. 395) response. You were requested to pmvide a statement that the diesel-generator system either meets or will meet the staff pesitions, or provide justification for an alternate resolution of the issue.

Your response, dated May 30,1979 (No. 514) indicates that Davis-Besse Unit 1 is in total compliance with Position 1 of our March 6,1979 letter and that nodifications will be made to the alarm circuitry to meet Positions 2 and 3.

Specifically, the annunciator window alanning the condition that the safety shutdown lockout relay is not reset is to be reworded to read "EMERG DG LOCK 0UT OR TRBL TRIP". A signal is also to be added to this annunciator to alann when the voltage regu-lator control switch is not in the " automatic" position.

Your May 30, 1979 letter states that diesel-generator starting during maintenance is prevented by closing manual valves in the air and fuel supply. Please confirm that these valves are included in the locked valve pmcedure and are entered into the locked valve log when they are in the closed position.

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l Mr. Richard P. Crouse We conclude that with the proposed modifications, the alam and contml circuitry for the diesel generators an adequate and should preclude any nonalamed conditions that could pmvent automatic start of the diesel-generaton.

Sincerely, f* 82%5*. g SIGNilD John F. Stolz, Chief Operating Reactors Branch f4,

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Toledo Edison Company i

Mr. Donald H. Hauser, Esq.

U.S. Nuclear Regulatory Comission The Cleveland Electric Resident Inspector's Office Illuminating Company 5503 N. State Route 2 P. O. Box 5000 Oak Harbor, Ohio 43449 Cleveland, Ohio 44101 Gerald Charnoff, Esq.

Shaw, Pittman, Potts and Trowbridge 1800 M Street, N.W.

Washington, D. C.

20036 Paul M. Smart, Esq.

Fuller & Henry 30011adison Avenue P. O. Box 2088 Regional Radiation Representative Toledo, Ohio 43603 EPA Region V 230 South Dearbern Street Mr. Robert B. Borsum Chicago, Illinois 60604 Babcock & Wilcox Nuclear Power Generation Division 7910 Voodmont Avenue, Suite E20 Bethesda, Maryland 20814 Ohio Department of Health ATTil: Radiological Health Program Director P. O. Box 118 President, Board of County Columbus, Ohio 43216 Commissioners of Ottawa County Port Clinton, Ohio 43452 Attorney General Department of Attorney General 30 East Broad Street Columbus, Ohio 43215 Harold Kahn, Staff Scientist Power Siting Commission 361 East Broad Street Columbus, Ohio 43216 Mr. James G. Keppler, Regional Administrator U. S. Nuclear Regulatory Commission, Region III 799 Roosevelt Road

-Glen Ellyn, Illinois 60137 Mr. Ted Myers Manager, Nuclear Licensing Toledo Edison Company Edison Plaza 300 Madison Avenue Toledo, Ohio 43652