ML20028B622

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Interim Deficiency Rept Re Safety Hazard Concerning Undetectable Failure Which Could Exist in on-line Circuits of Solid State Protection Sys.Westinghouse Finalizing Design Mod Package.Final Rept Expected by 830201
ML20028B622
Person / Time
Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 11/24/1982
From: Dixon O
SOUTH CAROLINA ELECTRIC & GAS CO.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
NUDOCS 8212030089
Download: ML20028B622 (2)


Text

__ _._ _

4 SOUTH CAROLINA ELECTRIC & GAS COMPANY O~

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,ost op,ics 7e4 CCLUMSIA. south CAROLINA 29218

o. W. DixON, JR.

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Nwember-24l!1V83 b3l 4 Mr. James P. O'Reilly, Director

0. S. Nuclear Regulatory Carnission Region II, Suite 3100 101 Marietta Street, N.W.

Atlanta, GA 30303

Subject:

Virgil C. Surttrer Nuclear Station Docket No. 50/395 Operating License No. NPF-12 Reportable Substantial Safety Hazard Solid State Protection System On-Line Test Circuit

Dear Mr. O'Reilly:

On August 25, 1982, the NRC was notified of a substantial safety hazard concerning an undetectable failure which could exist in the on-line testing circuits of the Solid State Protection System. This problem ms identified by Wastinghouse, and South Carolina Electric and Gas (SCE&G) was first informed on August 4,1982.

On September 3,1982, SCE&G transmitted a thirty (30) day report. Since that titre, SCE&G has revised the necessary Surveillance Test Procedure to verify contact closure. Westinghouse has concluded a hardware change will be generated to correct this design deficiency but has not yet finalized their design rrodification package.

This letter represents an interim report by SCE&G on this substantial safety hazard. We expect to make a final report by February 1,1983 pending cortpletion of design work by Westinghouse.

Very truly yours, 7

/j fe O. W.

xon, Jr #

JCL:OWD:tdh cc: see page two l

pd, 82120 0089 PDR ADOCK 0 PDR I

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.e Mr. J. P. O'Reilly Page two November 24, 1982 ces V. C. Sumer T. C. Nichols, Jr.

G. H. Fischer O. W. Dixon, Jr.

H. N. Cyrus H. T. Babb D. A. Nauman M. B. Whitaker, Jr.

W. A. Willians, Jr.

O. S. Bradham R. B. Clary M. N. Browne A. R. Koon H. Radin Site Q. A.

C. L. Ligon (NSRC)

G. J. Braddick J. L. Skolds J. B. Knotts, Jr.

B. A. Bursey I&E (Washington)

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