ML19290A357

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Responds to Re Msivs.Agrees That Valves Can Withstand Sudden Closure Resulting from Instantaneous Release of Pressure Upstream from Valves.Forwards Safety Evaluation.W/O Encl
ML19290A357
Person / Time
Site: Crane Constellation icon.png
Issue date: 01/16/1976
From: Reid R
Office of Nuclear Reactor Regulation
To: Arnold R
METROPOLITAN EDISON CO.
References
NUDOCS 7911060593
Download: ML19290A357 (2)


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DISTRIBUTION:

Docket File bec: TBAbernathy, DTIE NRC PDR JRBuchanan, NSIC Docket h.o.:

50-2S9

  1. N 161976 L PDR ORB #4 Rdg.

KRGoller/TJCarter RIngram DBridges Metropolitan Edison Company Attorney, OELD ATTN:

Mr. R. C. Arnold I6E (2)

Vice President - Generation BJones (4)

P. O. Box 542 BScharf (2)

Reading, Pennsylvania 19603 ACRS (16)

OPA, Clare Miles Gentlemen:

CTrammell We have reviewed your correspondence of October 3,1975, which addressed the subject of Main Steam Isolation Valves (MSIV's). The information provided adequately addresses the issue of MSIV design, and we concur with your conclusion that the MSIV's at Three Mile Island Unit I can withstand a sudden closure which would result from an instantaneous release of pressure upstream of the valves. Enclosed is a safety evaluation addressing this matter.

Sincerely, P00RBRJWJl o

Original signed by Robert W. Reid, Chief Operating Reactors Branch f4 Division of Operating Reactors

Enclosure:

Safety Evaluation cc w/ enclosure: See next page 1556 134

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.s Motropolitan Edison Company JAN 16 CS cc w/ enclosures:

G. F. Trowbridge, Esquire Mr. Charles P. Hoy, Chairman Shaw, Pittman, Potts, Trowbridge 6 Madden Board of County Commissioners Barr Building of Dauphin County 910 17th Street, N. W.

Dauphin County Court !!ouse Washington, D. C.

20006 P. O. Box 1295 Harrisburg, Pennsylvania 171:'O GPU Service Corporation Richard W. Heward, Project Manager Thomas M. Crimmins, Jr.,

Safety and Licensing Manager cc w/ enclosures 6 Metropolitan 260 Cherry Hill Road Edison filing dated:

Parsippany, New Jersey 07054 Mr. R. A. Heiss, Coordinator Pennsylvania Electric Company Governor's Office of Stato Mr. R. W. Conrad Planning and Development Vice President - Generation F

O. Box 1323 1001 Broad Street Harrisburg, Pennsylvania 17120 Johnstown, Pennsylvania 15907 Fr. Weldon B. Archart, Chairman Board of Supervisors of Londonderry Township 2148 Foxiann Road Middletown, Pennsylvania 17057 Miss Mary V. Southard, Chairman Citizens for a Safe Environment P. O. Box 405 Harrisburg, Pennsylvania 17108 1556 135 Dr. Edward O. Swartz Board of Supervisors Londonderry Township R. F. D. #1 - Geyers Church Road Middletown, Pennsylvania 17057 Government Publications Section State Library of Pennsylvania Box 1601 (Education Building)

Harrisburg, Pennsylvania 17126

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