ML20148C132

Topical Rept Evaluation of XN-NF-77-25, Exxon Nuclear Co (ENC) Evaluation of Two-Loop Westinghouse PWR W/Dry Containment Using ENC Model WREM-II ECCS Large-Break Example Problem. Rept Acceptable for Ref

ML20148C132
Person / Time
Issue date:	06/27/1978
From:	Ippolito T Office of Nuclear Reactor Regulation
To:	Nechodom W SIEMENS POWER CORP. (FORMERLY SIEMENS NUCLEAR POWER
Shared Package
ML20148C118	List: ML20148C132 ML20148C148
References
NUDOCS 7811010124
Download: ML20148C132 (1)

Text

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1. UNITED STATES e'  %[t NUCLEAR RECULATORY COMMISSION WASHINGTON, D. C,20555 r  % ,/ JUNE 2 7 1978 Exxon' Nudear Company ATTN: Mr. Warren Nechodom I Manager of Licensing and Compliance 2101 Horn Rapids Road

!Richland, Washington 99352  ;

I. Gentlemen: 1 1

The Nuclear Regulatory Commission staff has completed its review of $

the Exxon Nuclear Company Topical Report XN-NF-77-25, dated

}

August 1977, entitled, " Exxon Nuclear Company ECCS Evaluation of a e 2-Loop Westinghouse pWR with Dry Containment Using the ENC WREM-II i

5 ECCS Model; Large Break Example problem". We concluded that Topical i i

Report XN-NF-77-25 is acceptable for reference in application for construction permits, operating licenses, and operating license i amendments for reload fuels. A copy of our evaluation is enclosed.

The staff does not intend to repeat its review of Topical Report I XN-NF-77-25 when it appears as a reference in a particular license application. Should NRC criteria or regulations change, such that our conclusions concerning the Topical Report are invalidated, you will be notified and given the opportunity to revise and resubmit your Topical Report for review, should you so desire.

We request that you reissue Topical Report XN-NF-77-25 in accordance I with the provisions of the " Nuclear Regulatory Commission Topical Report program". If you have any questions, please contact John Hannon at (301) 492-7872.

Sincerely, I >

aas, A Thomas A 1ppolito, Chief I Operating Reactors Branch #3 Division of Operating Reactors

Enclosure:

i Exxon Topical Report Evaluation cc: see next page l 781101olPd h

I Exxon Nuclear Company I cc:

l I Exxon Nuclear Company ATTN: Mr. Gerald F. Owsley 2101 Horn Rapids Road j

l Richland, Washington 99352 I

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