ML20064D559
| ML20064D559 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 11/03/1978 |
| From: | Brown S VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| NUDOCS 7811070326 | |
| Download: ML20064D559 (1) | |
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November 3,1978 Mr. James P. O'Reilly, Director Serial No. 575A Office of Inspection & Enforcerent PSE&C/LCK/ad U. S. Nuclear Regulatory Comission
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I Pagion II Docket Nd. 50-339 101 Marietta Street Suite 3100 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
In accordance with.10CFR50.55(e), the NRC, Region II, was notified on October 6, 1978 that the Horth Anna Unit z Axial Power Distribution Monitor-t:ii3ystem (APDMS) provided by Westinghouse Electric Corporation contained a non-conservatism capable of causing a maximum error of 1.1% in the cal-culation of the LOCA peaking factor shape limits.
Vepco and Westinghouse are currently working together to develop a mutual permanent solution to this problem. Since this work has not yet been completed, you should consider this an interim report. The APDMS equipment is not yet operational and thus a short delay of a solution will have no consequences. A final report will be forthcoming subsequent to the completion of our work effort.
If you require any further information at this tire, please contact us.
Very uly y u 5 i
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Vi sident - Power 5 tion Eng ring and Constru tion cc: Mr. John G. Davis, Acting Director Office of Inspection & Enforcement Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation m.
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