ML20023D701
| ML20023D701 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 05/25/1983 |
| From: | Clark R Office of Nuclear Reactor Regulation |
| To: | Garrity J Maine Yankee |
| Shared Package | |
| ML20023D702 | List: |
| References | |
| NUDOCS 8306020505 | |
| Download: ML20023D701 (3) | |
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DISTRIBUTION SMM docket file NRC PDR MAY 2 51983 L PDR ORB #3 Reading Docket No. 50-309 DEisenhut 0 ELD EJordan KHeitner Mr. John H. Garrity, Senior Director PKruetzer Nuclear Engineering and Licensing NSIC Maine Yankee Atomic Power Company JTaylor 83 Edison Drive ACRS,10 Augusta, Maine 04336 Gray file
Dear Mr. Garrity:
SUBKCT: THERMAL SHIELD SUPPORT INTEGRITY We have completed nur review of your letter dated April 14,1983 on the status of Maine Yankee's thermal shield. We requested this letter from you in light of the severe problem with the thermal shield support structure at St. Lucie Unit 1.
We believe that it is ieportant for you to carefully follow and monitor the course of the investigation into the failure mechanism at St. Lucie 3
1.
You should be prepared to provide any additional analyses that may be l
identified as a result of that investigation to support your justification for continued operation.
In addition you should follow-up your recent I
submittal with a plant specific analysis to support the assumption that the snubbers and/or the core stops will arrest the fall of the thermal shield so that flow to the core would not be impaired.
We have concluded that continued operation at this time of Maine Yankee is justified, based on your submittal and ability to perform loose parts monitoring. We have also considered the potential for performing neutron noise analysis to detect motion of the thermal shield. Further justifica-tion is provided by your commitment to perform a limited visual inspection c
at the next refueling outage.
No response is needed to this letter. Our safety evaluation is enclosed.
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8306020505 830525 PDR ADOCK 05000309 Robert A. Clark, Chief P
PDR Operating Reactors Branch #3 Division of Licensing
Enclosure:
Safety Evaluation
- See previous page for concurrence.
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DISTRIBUTION:
SY 2 5 1303 Docket File NRC PDR Local PDR Docket flo. 50-309 3 Rdg DEisenhut
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OELD an Pr. John 11. Garrity,SSenior Director gr tiuclear Engineering and Licensing ACRS-10 Maine Yankee Atonic Power Company PMKreutzer-3 83 Edison Drive KHeitner Augusta, Maine 04336 \\
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Dear Mr. Garrity:
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SUBJECT:
THERMAL SilIELD SUPPORT INTEGRITY Ue have completed our review of your letter dated April 14, M83 on the status of t'aine Yankee's thermal shield. We requested this letter from you in licht of the severe problem with the themal shield support structurcuat St. Lucie Unit 1.
We have concluded that continued operation of t'aine Yankee is justified, based on your ability to perfom lo'ose parts monitoring. Ve have also considered the potential for perfoming neutron noise analysis to detect motion of the themal shield. Further justification is provided by your s
corsitment to perfom a limited visual inspection at the next refueling outage.
t'o response is needed to this letter. Ou safety evaluation is enclosed.
Sincer ly, Originc.1 signed by Robert A. Clark Robert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing
Enclosure:
Safety Evaluation cc: See next page I
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Maine Yankee Atomic Power Company i
l cc:
E. W. Thurlow, President Mr. Robert H. Groce Maine Yankee Atomic Power Company Senior Engineer - Licensing Edison Drive Maine Yankee Atomic Power Company Augusta, Maine 04336 1671 Worcester Road Framingham, Massachusetts 01701 Mr. Donald E. Vandenburgh Vice President - Engineering U. 'S. Environmental Protection Agency Yankee Atomic Electric Company Region I Office 1671 Worcester Road ATTN:
Reg. Radiation Representative Framingham, Massachusetts 01701 JFK Federal Building Boston, Massachusetts 02203 4
John A. Ritsher, Esq.
Ropes & Gray 225 Franklin Street i
Boston, Massachusetts 02110 State Planning Officer Executive Department 189 State Street Augusta, Maine 04330 Mr. E. C. Wood, Plant Manager Maine Yankee Atomic Power Company P. O. Box 3270 Wiscasset, Maine 04578 4
Regional Administrator U. S. Nuclear Regula' tory Commisfion Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 First Selectman of Wiscasset Municipal Building U. S. Route 1 Wiscasset, Maine 04578 Mr. Paul Swetland Resident Inspector c/o U. S. Nuclear Regulatory Commission P. O. Box E Wiscisset, Maine 04578 Mr. Charles B. Brinkman Manager - Washington Nuclear Operations Combustion Engineering, Inc.
7910 Woodmont Avenue Bethesda,. Maryland 20814 a
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