ML19207B863

Final Deficiency Rept Re Component Failures in Westinghouse 7300 Series Process & Control Sys.Westinghouse Has Supplied Replacement Components.Replacements Will Be Installed Prior to Fuel Loading

ML19207B863
Person / Time
Site:	North Anna
Issue date:	08/31/1979
From:	Brown S VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
G37A, NUDOCS 7909050440
Download: ML19207B863 (1)

Text

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August 31. 1979 Mr. Ja:nes P. O'Reilly, Director Serial No. 637A Office of Inspection & Enforcement PSE&C/JMD:mac:weng U. S. Nuclear Regulatory Commission Region II Docket No. 50-339 101 Marietta Street Suite 3100 Atlanta, Georgis 30303 Daar Mr. O'Reilly:

On August 1, 1979, a report was made under the provisions of 10CFR50.5S(e) concerning component failures in the Westinghouse 7300 Series Process Control Systs.

It was discovered that a f ailure of a component on the 7300 Serias signal comparito 'iAL carl 9sult") in a short.?i condition that ciasad tM 3:seciited 5istable to fail in an unLufe m de. This failure would, ho o//er, he detected by normal M 11t oeriadic tastin1.

The vendor, Westinghouse, has sucolded revisti components (T?xas Instra.vnt 75460 DIM output driver chip with oull-uo resistorsi to correct all NAL cards. The replacements will be completed on North Anna Unit ? orior to fuel loading.

This is our final report on this subject, If further information is desired, please advise.

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Senior Vice President Pow?e Statien/

Engineeying trd Construction ,.

cc: M*. Victor Stello. Director Office of Inspection & Enforcement Harold R. Centon, Director Office of Nuclear Reactor Regulation s.m m o\

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