ML20209H333

SER Supporting Util 831104 Response to Generic Ltr 83-28, Item 4.5.2 Re on-line Testing of Reactor Trip Sys Reliability

ML20209H333
Person / Time
Site:	Summer
Issue date:	01/30/1987
From:	NRC
To:
Shared Package
ML20209H318	List: ML20209H313 ML20209H333
References
GL-83-28, NUDOCS 8702060028
Download: ML20209H333 (2)

Text

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. ENCLOSURE SAFETY EVALUATION REPORT DOCKET NO. 50-395 VIRGIL C. SUMMER NUCLEAR STATION, UNIT 1 GENERIC LETTER 83 ?R, ITEM 4.5.?

REACTOR TRIP SYSTEM RELIARILITY, ON-LINE TESTING INTRODUCTION AND

SUMMARY

Generic letter 83-28 was issued by NRC onl i uly 8,1983, indicating actions to be taken by applicants and licensees based on the generic implications of the Salem ATWS events. Item 4.5 states a staff pnsition which requires on-line functional testing of the reactor trip system, including independent testing of the diverse trip features of the reactor trip breakers, for all plants. Item 4.5.9 requires applicants and licensees with plants not currently designed to permit this peri-odic on-line testing to justify not making modifications to permit such testina.

By letter dated November 4,1983, the licensee, South Carolina Electric and Gas Company, responded to the staff position regardino item 4.5.? of Generic Letter 83-28. Our review of this response finds it to be acceptable.

EVALUATION The licensee states that Item 4.5.9 is not applicable for the Virgil C. Summer Nuclear Station, Unit 1. The iten is not applicable because the nuclear unit is currently designed to permit on-line testing of the diverse trip features of the reactor trip breakers.

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2 CONCLUSION The staff finds that the Virgil C. Summer Nuclear Station, Unit 1 is designed to permit on-line functional testing of the reactor trip system, including independent testing of the diverse trip features of the reactor trip breakers.

Thus, the applicant meets the staff position of Item 4.5.2 of Generic Letter 83-28.

Principal Contributors:

Jon B. Hopkins, Proiect Directorate #2, DPLA Argil L. Toalston, Electrical, Instrumentation and Control Systems Branch, DPLA F. G. Farmer, EGAG Idaho, Inc.

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