ML19323C793
| ML19323C793 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 04/17/1980 |
| From: | Crouse R TOLEDO EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-79-27, NUDOCS 8005190201 | |
| Download: ML19323C793 (2) | |
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8 00519 0 AO 7 TOLEDO EDISON Docket No. 50-346 Ac.:ana p caosst N==r License No. NPF-3 ie s: as ser-Serial No. 1-126 April 17, 1980 Mr. James G. Kept'er Regional Director, Region III Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Dar Mr. Keppler:
On March 3,1980 Toledo Edison provided a partial response to IE Bulletin 79-27 dated November 30, 1979 (Log No. 1-280) for the Davis-Besse Nuclear Power Scation, Unit 1.
In that response items la and 3 were completed.
Items Ib, Ic and 2 were deferred. This letter provides a status and expected completion dates of the remaining items.
Items Ib and Ic As a result of the February 26, 1980 transient at Crystal River, Unit 3, Toledo Edison has expanded the review of this Bulletin to include electrical buses internal to the non-nuclear instrumentation and integrated control system (NNI/ICS). Toledo Edison has retained the services of two censultants to review power supplies. One consultant has reviewed the external power to the NNI/ICS, and the second consultant has reviewed the loss of power supplies internal to the NNI/ICS. Both studies are nearly complete, and Toledo Edison is reviewing the preliminary information.
Items Ib and Ic will be evaluated based on various combinations of the loss of instrumentation and control functions (that are caused by a single electrical fault or active failure in NNI or ICS). This will delay our responses to these items until May 6, 1980.
Item 2 As indicated above the scope of this review has been expanded in the NNI/ICS areas.
This item, dealing with review of emergency procedures and updated training of the operators, will be completed before start-up following the current DB-1 refueling outage.
APR 2 21980 THE TOLEDO EDISON COMPANY EDISON PLAZA 300 MADISON AVE 4UE TOLEDO. OHIO 43652 O
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t Docket No. 50-346 License No. NPF-3 Serial No. 1-126 April 17,1980 Page Two Additionally and related to this Bulletin, on April 16, 1980 (Serial No. 609) Toledo Edison commited to a test to verify the results of the expanded evaluations of items Ib and Ic.
'Ihis test will be completed prior to start-up following the current DB-1 refueling outage.
Very truly yours,
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RPC:TJM: cts cc:
Luis Reyes NRC-Site Inspector i
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