ML20198F616

Requests Technical Assistance in Evaluating Util 750903 Submittal Re Loads on Reactor Vessel Support Structure for Postulated LOCAs

ML20198F616
Person / Time
Site:	Washington Public Power Supply System
Issue date:	09/30/1975
From:	Schwencer A Office of Nuclear Reactor Regulation
To:	Heineman R Office of Nuclear Reactor Regulation
References
CON-WNP-1090 NUDOCS 8605290020
Download: ML20198F616 (5)

Text

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! R. Heinanan, Director, Division of Teamf=1 Review, NRR TEWNICAL ASSISTANCE RMUEST l

i Your assistance is requested for the following:

PLtWT NATE: NNP-1,4 DOCKET MISERS: , 50-513 l

j RESPONSIBLE BRANCll: LWR 2-3 00NTACr: 'Ihomas Cox, Project Manager (x7886)

TEQlNICAL RLVIEW BRANOI: Contalment Systens Branch Mechanical Engineering Branch (others as specified by UTR)

TARGCr CO!PIETION DATE: 1975 Detob'er-Decenber 1, 15,1975 (see Description of Request)

DESCRIPTION OF RF@EST: Review and evaluate applicant's submittal (WPPSS i  ; letter to staff dated 9/3/75) concerning loads on reactor vessel support structure for certain l postulated IDCA's. As part of the report on l the generic concern for reactor pressure vessel supports, WPPSS has presented a revised sub-compartment pressure differential analyses l t based on their recent addition of guani pipes l

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on reactor vessel hot and cold legs within the reactor compartment. Project staff requests prompt review of guard pipe design and sub-compartment differential pressure analyses in ordor to avoid carrying this issue as .m open iten into the post CP period. A radiological I safety hearing on this application las been tentatively scheduled by ASLB for 11/4/75, i j with testimny required by 10/15/75.

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2-1 To meet hearing requiranants, the requested l target dates are staged: 10/15/75 for review

! of subconpartment differential pressure calculations and guani pipe desiga; and i

12/1/75 for report to DRL on overall report.

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m::w. car A. Schwencer, Otief Light Water Reactors Branch 2-3 Division of Reactor Licensing cc: W. AtDonald J. Panzarolla R. Todesco

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LWR 2-3 File TCox VA\1oore

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DISTRIBUTION Docket File NRC PDR LOCAL PDR NRR RDG ,

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DSkovholt EGoulbourne ASchwencer TCox TIC DEisenhut LWR 2-3 file JFStolz l

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