ML19345F560
| ML19345F560 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 02/13/1981 |
| From: | Merritt W BOSTON EDISON CO. |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| 81-38, NUDOCS 8102180410 | |
| Download: ML19345F560 (2) | |
Text
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BDaTON EDISON COMPANY acucmat arricca som sovtsrom armer, sostom. MassacMusETTs o2199
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MANAGER wunc4=cuoisecmma orn=rMeur February 13, 1981 BEco. Ltr. #81-38 Mr. Darrell G. Eisenhut, Director Division of Licensing Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Comission Washington, D.C.
20555 L1 cense No. DPR-35 Docket No. 50-293 BWR Scram Discharge Systen Pemanent Design Chance._
Ref.(a) Letter D. Eisenhut to All BWR. Licensees "BWR Scram Systems" dated October 1,1980 (b) Letter #80-267 Boston Edison to D. Eisenhut dated October 24, 1980 (c) Letter D. Eisenhut to All BWR Licensees '
"BWR Scram Discharge System'! dated December 9, 1980
Dear Sir:
As requested in Ref.(a), please be advised that Boston Edison Company intends to modify the Scram Discharge System at Pilgrim Nuclear Power Station to meet the long-tem design and safety criteria as presented in your December 1,1980 Generic Safety Evaluation Rep' ort accompanying Ref.(c).
Design modifications presently being evaluated for compliance with this criteria are:
A.
I1 stalling redundant instrument volumes with improved hydraulic coupling from the scram discharge header, e.nd improving the reliability of the level instrumen-tation in the instrument volumes to sustain fluid transients (hydrodynamic loads) or B.
Providing a single instrument volume with improved hydraulic coupling-from the scram discharge header and improving the reliability of the level instru-mentation in the instrument volume.
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cOSTON EDIRON COMPANY Mr. Darrell G. Eisenhut February 14, 1981 Page Two The engineering evaluation and decision the final design will be completed by June 15, 1981, which is in such t.ose proximity to our next refueling outage (September, 1981), that the earliest real date for im-plementation is during our 1983 refueling outage, tentatively scheduled for June 1983.
The NRC position on Diverse Instrumentation remains as an item under review and is not included as part of our commitment at this time.
We trust this letter is responsive to your concerns; however, should you require additional information please do not hesitate to contact us.
Very truly yours, 5
Y!u Commonwealth of Massachusetts)
County of Suffolk
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Then personally appeared before me Wayne J. Merritt who, being duly sworn, did state that he is Manager - Nuclear Engineering of Boston Edison Company, the applicant herein, and that he is duly authorized to execute and file the subnittal contained herein in the name and on behalf of Boston Edison Company and that the statements in said subnittal are true to the best of his knowledge and belief.
I My commission expires: 70/y
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