ML19209A516

Forwards First Deficiency Rept Re Qualification of Control Sys.Next Rept Will Be Submitted in Approx Three Months

ML19209A516
Person / Time
Site:	Wolf Creek, Callaway, Sterling
Issue date:	09/28/1979
From:	Petrick N STANDARDIZED NUCLEAR UNIT POWER PLANT SYSTEM
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19209A517	List: ML19209A516 ML19209A519
References
NUDOCS 7910040278
Download: ML19209A516 (1)

Text

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SNUPPS Stendardized Nuclear Umt Power P1 ant System 5 Choke Cherry Road Nicnolas A. Petrick Rochville, Maryf and 20850 Executive Director (301) 869 4010 September 28,1 '79 SLNRC 79 15 FILE: 0491.10.2 SUBJ: Qualification of Control Systems Mr. Boyce Grier Director, Region I U.S. Nut. lear Regulatory Comission 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 informed the Nuclear Regulatory Comission, Region I Office of Inspection and Enforcement, of a potential deficiency involving the qualification of control systems. The infc.mation was comunicated by telephone to Mr. Bateman of your staff pursuant to 10 CFR 50.56(e). The subject of our report was the same as that later promulgated by the NRC in IE Information Notice No. 79-22.

Westinghouse determined that, due to the environment caused by a postu-lated high energy line break, certain non-safety grade equip nent 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 sumary 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, L C M \C

' Nicholas A. Petrick RLS/dck Enclosure 1070 168 cc: Mr. James G. Keppler, Directcr, Region III, USNRC Mr. Karl V. Seyfrit, Director, Region IV, USNRC NMr. Victor Stello, Jr., Director, Office of Inspection and Enforcement, Washington, D.C. [\$9g s

'7910040 M T S