ML20235A330

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Forwards Evaluation Accepting Nonproprietary Nedo 10859, Steam Vent Clearing Phenomena & Structural Response of BWR Torus, W/Described Limitations,Per Addl Info Submitted on 370521 & 1228.W/o Evaluation
ML20235A330
Person / Time
Site: 05000000, Quad Cities
Issue date: 08/22/1974
From: Butler W
US ATOMIC ENERGY COMMISSION (AEC)
To: Hinds J
GENERAL ELECTRIC CO.
Shared Package
ML20234C970 List:
References
FOIA-87-40 NUDOCS 8707080401
Download: ML20235A330 (2)


Text

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. Mr. John A. Hinds, Manager 1-Safety ami Licesing I-Maclear Energy Division.

i General Electric Capuny i

175 Curtner Avernae L

San' Jose, California 95114

Dear Mr. Hinds:

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h Regulatory staff has completed its review of General Electric i

Cagany's Topical Report NEDO 10859 (non-proprietary)i entitled, " Steam li

. Vent Clearing Pl==amann and Structural Response of the BMt Torus".

Our review included consideration' of the errata and addendua dated

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May 21, 1973 ami the additional information provided by letter frun

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- J. A. Hinds to D. L. lienen dated December 28, 1973. Our evaluation

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of this report is enclosed.

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As a result of. our review, we have cmcluded that NEDO 10859,~ as I

clarified by the additional information provided in the above cited-L d e = ants, provides an acceptable basis, within the limitatims

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described in the enclosed evaluation, for predicting the fluid L

pkncunena in the torus water due to relief valve actuatim. We have l

also carelirlad that the analytical model for torus structural response to the above phenomena is not sufficiently verified by test data to be

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acceptable for application to the Quad Cities Nuclear Generating Station or other BMt facilities with pressure suppression containment systems.

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.L 1herefore, NEDO 10859 and the above cited supplemental information, is acceptable for reference as a topical reart, m license applications or ped programs relating to fluid pmrw=ans for verification of p

torus latogrity through the life of a fad 14ty. N report is not an l

acceptable reference for bases relating to structural response of the j

torus.

This letter carv1mlas the staff's review of NEDO 10859. 1hs enclosed i

evaluation will be applied when a particular license application or naposed program, includes a reference to NEDO 10859. The staff, muever, will review pertinent referenced portions of NEDO 10859 relating to licensee test programs for verification of torus structural j

integrity.

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John A. Ifinds

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Should Regulatory criteria or regulations change, such that our

.i conclusions concerning NEDO 10859 are modified, you will be notified 4

and given the vyyv danity to revise and resubmit your topical report

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for our review.

fj We request that GE issue a revised version of NEDO 10859 in an expeditious manner, to incorporate all the changes made to date on the report.

If

j ycu have any questions concerning our evaluation of NEDO 10859, please j

contact us.

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Sincerely, 3

1 1f Walter Butler, Chief a-Light Water Reactors Pr. 1-2 j

j Directorate of Licensing i

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I:nclosure:

Topical Report Evaluation j

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cc: Mr. Larry Giffoni i

General Electric Ccupany j

Suite 1107 j

4720 Montgomery Lane

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