ML19209B976
| ML19209B976 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 10/09/1979 |
| From: | Vandenburgh D Maine Yankee |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19209B977 | List: |
| References | |
| WMY-79-112, NUDOCS 7910110342 | |
| Download: ML19209B976 (2) | |
Text
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\\ MAIRE VARHEE ' 7 ~ ='E5:7"*""
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$CM ENGINEERING OFFICE WESTBORO, MASSACHUSETTS 01581 617-366-9011 n&
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October 9, 1979 United States Nuclear Regulatory Commission Washington, D.C.
20555 Attention: Office of Nuclear Resctor Regulation Mr. Harold R. Denton, Director Re ference:
(a) License No. DPR-36 (Docket Na. 50-309)
(b) USNRC Letter to all operating light water reactors dated September 17, 1979 (c) USNRC/IE Letter to MYAPC dated September 14, 1979
Dear Sir:
Subject:
Potential Unreviewed Safety Question Regarding Safety Function Interactions with Non-Safety Grade Systems This letter responds to your letter, Reference (b), regarding the above subject, which was further detailed in Reference (c).
Maine Yankee has completed an investigation of the systems specifically identified in Reference (c). A description of this investigation, which includes an identification of possible interactions between non-safety grade and safety grade systems, and their impact on the safety analysis are presented in the enclosure entitled:
" Report on Failure Effects of Equipment Not Qualified for Accident Related Environments". Where such interactions were found, appropriate corrective actions have been instituted as detailed in the enclosure.
Our ii
..tigation did not identify any potential failures which would alter the conclusions of the operating license.
As detailed in the enclosure, Maine Yankee is continuing, under Phase II, its efforts in this matter. We believe this work will involve a long time commitment and that the scope of the action required is fully consiatent with the requirements of NUREC-0578, and should therefore be integrated with the planned response sequence for compliance with the NUREG.
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United States Regulatory Commission Page 2 Mr. Harold R. Denton October 9, 1979 We believe the information and comitment presented herein are respcasive to your request. We are concerned at the prominence given this matter when industry resources are being severely taxed to respond to similar matters already under consideration as detailed in NUREG-0578.
Very truly yours, MAINE YANKEE ATOMIC POWER COMPANY T P\\ f v ~V D. E. Vandenburgh Vice President RHG/nj COMMONWEALTH OF MASSACHUSETTS ss.
COUNTY OF WORCESTER Then personally appeared before me on the 9th day of October, 1979, D. E. Vandenburgh, who, being duly sworn did state that he is Vice President of Maine Yankee Atomic Power Company, that he is duly authorized to execute and file the foregoing information in the name and on the behalf of Maine Yankee Atomic Power Company, and that the statements therein are true to the best of his knowledge and belief.
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Robert H. Groce Notary Public
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