ML19242C575
| ML19242C575 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 07/26/1979 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Groce R Maine Yankee |
| References | |
| NUDOCS 7908130034 | |
| Download: ML19242C575 (3) | |
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'g UNITED STATES y %.e,( i q NUCLEAR REGULATORY COMMISSION WASHINGTO N, D. C. 20555 JUL 2 61979 Occket No.: 50-309 Mr. Robert H. Groce Licensing Engineer Maine Yankee Atomic Power Company 20 Turnpike Road Westboro, Massachusetts 01581
Dear Mr. Groce:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING IE SULLETIN 79-06B We have reviewed your responses to IE Bulletin 79-065 for the Maine Yankee Atemic Power Staticn which were transmitted by letters dated April 26, May 4, May 14, and Junc 8, 1979. Our review of your responses has led us to believe thac you have a general understanding of our concerns arising from the TMI-2 incident in relation to their implications to the operation of the Maine Yankee Atomic Power Station.
Nevertheless, we have discovered some deficiencies in your responses wnich must be resolved before we issue our safety evaluation for the Maire Yankee Atomic Power Station. The resolution of these deficiencies is contingent upon receiving complete and acceptable responses to the questions in Enclosure 1.
As a result of cur continuing review of the TMI-2 incident, we may impose other corrective actions in addition to those in IE Bulletin 79-063.
In the interim, if you need any clarification of the enclosed questions, please contact Mr. I. Villaiva, the staff's assigned project manager for Sulletins and Orders invoiving C-E designed reactors. Mr. Villaiva may be reached on (301) 492-7745.
In order to ensure a timely response to the items in the enclosure, we pre-viously transmitted to you a facsimile of said enclosure via telephone. Accord-ingly, we request that responses to the items in the enclosure be forwarded to this office approximately two weeks after receipt of the enclosure, but no later than August 10, 1979.
Sincerely,
. //
J R. W. Reid, Chief Operating Reactors Branch No. 4 Division of Operating Reectors
Enclosure:
Request for Additional Information
"'l xi'l cc w/ enclosures: See next page
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Yankee Atonic Electric Company cc:
E. W. Thuricw, President Mr. Robert R. Radclif fe Maine Yankce Atonic Power Company Of fice of Energy Resources 9 Green Street 55 Capitol Street Augusta, Maine 04330 Augusta, Maine 04330 Mr. Donald E. Vandenburgh Vice President - Engineering Yankee Atonic Electric Company 20 Turnpike Road Westboro, Massachusetts 01581 John A. Ritsher, Escuire Ropes and Gray 225 Franklin Street Boston, Mas;achusetts 02110 Mr. John M. R. Paterson Assistant Attorney General State of Maine Augusta, Maine 04330 Mr. Nicholas Barth Executive Director Sheepscot Valley Conservation Association, Inc.
P. O. Box 125 Alna, Maine 04535 Wiscasset Public Library Association High Street Wiscasset, Maine 04578 Mrs. L. Patricia Coyle, President SAFE POWER FCR MAINE Post Of fice Box 774 Canden, Maine 04843
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RE0UEST FOR ADDITIONAL INFORMATION REGARDING IE BULLETIN NO.79-06B MAINE YANKEE ATOMIC POWER STATION DOCKET NO. 50-309 As a result of our review of the MYPC0 responses to Bulletin No.79-06B, we find that the following additional information is required. The item numbers correspond to the bulletin action items and the related licensee's response.
2.a Your response indicates that the parameters checked for indication of core voiding are pressurizer temperature and hot leg temperature.
We believe other parameters (e.g., RCS flow indications, incore temperature monitors, source range instruments and water saturation curves) can be used to aid in determining the possibility of core voiding. Discuss the consideration given to these other parameters in your review of this item and the procedure changes which were or will be implemented regarding the use of these other parameters.
During recent phone conversations, you have indicated that work regarding the issue of voiding and natural circulation operation is ongoing and expected to be completed by July 31, 1979.
Please address this issue as requested in the Bulletin.
9.b Please confirm that the revised forms for verification that safeguards equipment has been returned to service clearly require verification that the affected safeguards system has been returned to service.
9.c Describe your current watch relief procedures to assure tnat on-coming personnel are fully aware that previously secured safeguards equipment has been returned to service.
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