ML20148F301

Forwards Request for Addl Info Re Main Steam Check Valves & Ref Elastic Plastic Deformation Energy to Complete Review of Util 751020 Evaluation.Response Requested by 760527

ML20148F301
Person / Time
Site:	Yankee Rowe
Issue date:	04/20/1976
From:	Purple R Office of Nuclear Reactor Regulation
To:	Groce R YANKEE ATOMIC ELECTRIC CO.
References
NUDOCS 8011040759
Download: ML20148F301 (3)

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DISTRIBLTTION:

Docket Files  !

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ORB #1 Reading f

Docket No. 50-29 KRGoller ,

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RAPurple ABurger Yankee Atomic Riectric Company SMSheppard ATTN: Mr. Robert H. Groce DEisenhut Licensing Engineer TBAbernathy 20 Turnpike Road JRBuchanan Westboro, Massachusetts 01581 ACRS (16) I i

Gentlemen:

i This refers to your evaluation of the excess flow and reverse flow check valves installed in the main steam lines at Yankee-Rowe which you submitted I on October 20, 1975.

We have reviewed your submittal and find that we need the additional information identified in the enclosure to this letter to continue our review.

1 In order to maintain our review schedule we need your response to this request by May 2r/, 1976.

Sincerely, .

O*4:' irr.ed by:

Eue.cct i P"%

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l Robert A. Purple, Chief Operating Reactors Branch #1

Division of Operating Reactors l

Enclosure:

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, Request for Additional Information I l .: See next page , .

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Tlits DOCUMENT Cr TAINS POOR QUAllly AGES

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foran ABC 318 (Rev. 9 33) AECM 0240 W u. s. oovsmaassNT pasarine orricas is74.ose tee 80.ngo 759 $

f ^ , :- Ygnkse_ Atomic El--tric Company -

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April 29, 1976

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e cc: . Mr. Donald G. Allen, President Yankee. Atomic Electric Co:pany . -

20 Turnpike Road . .

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Westboro, Massachusetts 01581 s-I Greenficid Public Library 402 Main Street

Greenfield, Massachusetts 01581 i

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REQUEST 70R ADDITIONAL INFORMATION YANKEE NUCLEAR POWER STATION (YANKEE-ROWE)

DOCKET No. 50-29

1. Identify the report used as a prototypical base for evaluating the Yankee Rowe main steam check valves. If this report has not been submitted'by another utility submit a copy for our evaluation.

2. Expand your description of the scaling of the referenced elastic plastic deformation energy to be more specific in the identification of the physical dimensions used and the justification for their use.

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