ML20125B035

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Notifies of Review of Re Loss of Continuous Natural Circulation & Effect on Plant Safety.Requests Addl Info Re B&W Conservative Analysis of Thermal Cycling of once-through Steam Generator
ML20125B035
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 08/30/1979
From: Jay Collins
NRC - TMI-2 OPERATIONS/SUPPORT TASK FORCE
To: Herbein J
METROPOLITAN EDISON CO.
References
NUDOCS 7910190305
Download: ML20125B035 (1)


Text

._ __ _ _ _ _ _ _ -___________ - __ _ ______ _

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i August 30, 1979 l Docket No. 50-320 i

Mr. John C. Herbein, Vice President

Nuclear Operation Metropolitan-Edison Company Trailar Number 120 Middletown, Pennsylvania 17057 Daar Mr. Herbein; i

In reviewing your responses to our questions regarding the loss of continuous natural circulatica and its effect on plant safety contained in your letter j s

dated August 17, 1979, CQL 1074, we find that additional information is ,

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required. This additional information consists of the SW conservativa )

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analysis of thermal cycling of the OTSC which abows that it can withstand at least 10' cycles.

Couplation of our review is awaiting this information. Your prompt submittal will be appreciated.

Sincerely, 4

l John T. Collins, Deputy Director TMI-2 Support cc:

R. Vollmar M. Greenberg i S. Newberry

J. Verr.iel A.,Ignatonis l S. Maingi B6W i

i TMI-2 TMI-2 AIgnatonis:si JCollins -

8/ /79 8/ /79 7910190 C)h