ML19253C798

Forwards Interim Deficiency Rept Re Qualification of Control Sys.Supplemental Rept in Approx Three Months

ML19253C798
Person / Time
Site:	Wolf Creek, Callaway, Sterling
Issue date:	10/15/1979
From:	Petrick N STANDARDIZED NUCLEAR UNIT POWER PLANT SYSTEM
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19253C796	List: ML19253C798
References
SLNRC, NUDOCS 7912120146
Download: ML19253C798 (1)

Text

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• • , ,. y SNUPPS Standardized Nudeer Unit Power Plant Systern 5 Choke Cherry Road Nicholas A. Petrick Rockvme, Maryland 20850 Executive Director (301)8694010 September 28, 1979 SLNRC 79 15 FILE: 0491.10.2 SUBJ: Qualification of Control Systems Mr. Boyce Grier Director, Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406 Docket Nos.: STN 50-482, STN 50-483, STN 50-485, STN 50-486

Dear Mr. Grier:

On August 30, 1979, SNUPPS infomed the Nuclear Regulatory Comission, Region I Office of Inspection and Enforcement, of a potential deficiency involving the qualification of control systems. The information was comunicated by telephone to Mr. Bateman of your staff pursuant to 10 CFR 50.55(e). The subject of our report was the same as that later promulgated by the NRC in IE Infomation Notice No~. 79-22.

Westinghouse determined that, due to the environment caused by a postu-lated high energy line break, certain non-safety grade equipment could mal function. The combination of the pipe break and the non-safety grade equipment failure may have more severe consequences than those presented in Safety Analysis Reports. The enclosure to this letter provides a summary of each of the four problem areas identified by Westinghouse as they pertain to the SNUPPS design. As noted in the enclosure, a supplemental report on this matter will be submitted in about three months.

Very pruly yours, C44\C Nicholas A. Petrick RLS/dck Enclosure 1538 310 cc: Mr. James G. Keppler, Director, Region III, USNRC Mr. Karl V. Seyfrit, Director, Region IV, USNRC Mr. Victor Stello, Jr., Director, Office of Inspection and Enforcement, Washington, D.C.

7912120 /