ML20045J163

Forwards Final Control Bldg Flooding Event Tree,Noting That anti-siphon Capability Part of Design of RSW Sys on Both Supply & Return Lines

ML20045J163
Person / Time
Site:	05200001
Issue date:	06/24/1993
From:	Mcsherry A GENERAL ELECTRIC CO.
To:	Kelly G Office of Nuclear Reactor Regulation
Shared Package
ML20045J155	List: ML20045J154 ML20045J163 ML20045J176 ML20045J207 ML20045J224
References
NUDOCS 9307230120
Download: ML20045J163 (2)

Text

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Facsimile Cover Sheet To: Glenn Kelly Company: NRC,NRR,DSSA,SPSB Phone: (301) 504-1075 Fax: (301) 504-2260 From: Art McSherry Company: GE Phone: (408) 925-1917

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Fax: (408) 925-1193 3

Date: 06/24/93 t

Pages including this cover page: 2 Comments: Attached is the final control building flooding event tree.

The one change you should note is that anti-siphon capability is part of the design of the RSW system on both the supply and return lines.

i We have not specified how this must be accomplished (e.g., vacuum breaker, air break). This can be determined by the COL applicant.

The unavailability of the pump trip / valve closure uses 1E-3 per demand for the anti-siphon function and addresses CCF of the isolation vaives, if you need further clarification of the ET please call m e.

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