ML19329B336

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Forwards Draft Safety Evaluation & Addl Info Request Re Reactor Vessel Support Sys
ML19329B336
Person / Time
Site: North Anna, Davis Besse  Dominion icon.png
Issue date: 08/08/1975
From: Maccary R
Office of Nuclear Reactor Regulation
To: Moore V
Office of Nuclear Reactor Regulation
Shared Package
ML19329B337 List:
References
NUDOCS 8002040765
Download: ML19329B336 (2)


Text

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t AUG B G75 DOCIET NO.: 50-346

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V V. A.sAoore, Assistant Director O'

for Light %'ater Reactors, Group 2 D

Division of Reactor Licensing

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DAVIS BESSE tiUCLEAR POWER STATION UNIT 1 Plant ;iame: Davis 3 esse Nuclear Power Station Licensing Stage: OL Docket No. : 50-346 Respo:nsible RL 3 ranch i Project Manager: Lb2 2-3, L. Engle Description of Response: Safety Evaluation Report Review Status: Complete, as noted The FSAR submitted by tha applicant, includin:; Amendment 30 (Revision 14) has been reviewed by the Mcchanical Engineering 3 ranch, Division of Technical Review. Tha appropriate sections of the Safety Evaluation are enclosed and are identified by section nu=hers which refer to the Standard Format and Content of Safety Analysis Reports for iuclear Power Plants, Revision 1 dated October 1972.

It should be noted that the information in section 3.6 is based on verbal a;;reement reached during discussions with the a;iplicant's A/E on August 4, 1975. If the applicant does notaadequately document these cor:mitments in a future amendnent, this Safety 2 valuation may have to be revised.

On :tay 7,1975 the Nuclear Regulatory Cen:::ission staff was informed by the Virginia Elactric and Pouer Co,:pany that one type of load that would occur in the unli'4aly event of a cold leg loss-of-coolant accident (LOCA) has been underestimated in the original design of the reactor vessel rapport systen for North Anna Units 1 5 2.

To decarmine if the same

>otential problen exists in the case of Davis Besse Unit 1 and to assess c.ts effects on the reactor vessel support system, a request for additional

.nformation is also forwardad. The applicant's response will be evaluated and treated in a supplement to the 522.

rR:.O;hcD7 g n.._; - r" R. R. Maccary, Assistant Director for Engineering Division of Technical Review

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Enclosure:

1. Safety Evaluation Report
2. Requen for Add (tional Inf on

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R. 3.11einenan, TR A. Schwencer, 2 J. P. Kni;;ht, TR R. J. Losnak, TR L. Engle, RL V. S. Noonan, TR cc w/o enc 1:

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