ML19309G626

Deficiency Report Re Undetectable Failure in Engineered Safety Features Actuation Sys.Licensee Investigating Hardware Changes Which May Preclude Need for Tests Described in 800215 Ltr

ML19309G626
Person / Time
Site:	Wolf Creek, Callaway, Sterling
Issue date:	03/20/1980
From:	Petrick N STANDARDIZED NUCLEAR UNIT POWER PLANT SYSTEM
To:
Shared Package
ML19309G624	List: ML19309G626 ML20003H960
References
SLNRC-80-12, NUDOCS 8005070256
Download: ML19309G626 (1)

Text

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94UPPS Stenderdised Nucteer Unit Power Pfent System ,

5 Choke Cherry Road Nicholas A. Petrick vi tend 20050 Executige Director March 20,1980 ,

SLNRC 80- 12 FILE: 0491.10.2 SUBJ: Undetectable Failure in Engineered g3fety Features Actuation System Mr. Boyce Grier Director, Regica I U.S. Nuclear Rt.gulatory Commission 631 Park Avenua King of Prussia, Pennsylvania 19406 Docket Nos.: STN 50-482, STh 50-483, STN 50-485, STN 50-486

Reference:

(1) SLNRC 79-21, dated 12/6/79: Same subject (2) Westinghouse letter (T.M. Anderson), NS-TMA-2204, to USNRC (V. Stello, Jr.), dated 2/15/80: Same subject

Dear Mr. Grier:

Reference (1) reported a potential deficiency involving the Engineered Safety Features Actuation System and described a test sequence that was the necessary corrective action applicable to the SNUPPS plants. Ref-erence (2) provided the NRC with revised tests that yield more conclusive results.

The SNUPPS utilities are investigating hardware changes that may preclude the need for the tests described in Reference (2). If such hardware changes are not feasible, the appropriate test sequence from Reference (2) will be incorporated in the procedures for the SNUPPS plants.

Very truly yt ers,

-C4fW Nicholas A. Petrick RLS/vas 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, USNRC, Washington D.C.