ML20140B891

Discusses W Decision Not to Perform Tests for Verifying FW Hammer Occurrence in AP600 Design.Nrc Finds Decision Unacceptable

ML20140B891
Person / Time
Site:	05200003
Issue date:	06/03/1997
From:	Slosson M NRC (Affiliation Not Assigned)
To:	Liparulo N WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
References
NUDOCS 9706060373
Download: ML20140B891 (3)

Text

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2 j NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20565 4 001

1. June 3, 1997 Mr. Nicholas J. Liparulo, Manager Nuclear Safety and Regulatory Analysis Nuclear and Advanced Technology Division Westinghouse Electric Corporation s P.O. Box 355 Pittsburgh, PA 15230

SUBJECT:

WATER HAMMER TEST FOR THE AP600 CONDENSATE AND FEEDWATER SYSTEMS l

Dear Mr. Liparulo:

l By letter dated February 7, 1997, in response to Q410.263, Westinghouse declined to perform tests for verifying feedwater hamer occurrence in the AP600 design. Westinghouse states that these tests have been performed on many Westinghouse feedring-type steam generators in the United States, and 4

that these tests verify the effectiveness of the Westinghouse feedring design, which is like that described in the AP600 standard safety analysis report (SSAR), for preventing water hamer.

Branch Technical Position (BTP) (ASB) 10-2 of the Standard Review Plan provides design guidance for meeting the requirements of General Design Criteria 4 on the dynamic effects associated with possible water hammers in feedwater piping. Specifically, BTP (ASB) 10-2 states that testing should be ,

I performed to verify that unacceptable feedwater hammer will not occur, and that procedures for the tests be approved by the Nuclear Regulatory

. Commission. The only basis Westinghouse provided for not performing the. tests is that the same tests have been performed in other Westinghouse plants.

Westinghouse's proposal for the AP600 may be acceptable if Westinghouse

performed .an engineering analysis based on test data from an identical Westinghouse plant that was acceptably tested for a feedwater hammer occur-rence. However, without acceptable test data to verify water hammer occur-rence in the feedwater system, the tests must be performed on the AP600.

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MRC RLE CENTER COPY 9706060373 970603 PDR ADOCK 05200003 A PDR

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l Mr. Nicholas J. Liparulo June 3, 1997 j

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4 The staff concludes that Westinghouse's proposal to not perform the water i hammer tests has not been satisfactorily justified, and is,' therefore, l unacceptable. We request that Westinghouse commit to performing the tests for '

i verifying feedwater hammer occurrence for the AP600 design. If you have any 1 questions regarding this matter, you can contact T.J. Kenyon at 1 (301) 415-1120. l 4 i 4 Sincerely, l l

1 j original signed by:

Marylee M. Slosson, Acting Director Division of Reactor Program Management Office of Nuclear Reactor Regulation

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Docket No.52-003 l 1

cc: See next page DISTRIBUTION:

Docket File PDST R/F MSlosson PUBLIC SWeiss TQuay TQuay TKenyon BHuffman JSebrosky DJackson GHolahan, 0-8 E2 ACRS (11) JMoore, 0-15 B18 WDean, 0-5 E23 ,

JGuo, 0-8 D1 HWalker, 0-8 D1 CLi, 0-8 D1 i LMarsh, 0-8 D1 l

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d DATE 05/C/97 05h*/97 L456d/97 0$/A/97  !

0FFICIAL RECORD COPY I

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i i-Mr. Nicholas J. Liparulo Docket No.52-003 l Westinghouse Electric Corporation AP600 }

t cc: Mr. B. A. McIntyre Mr. Ronald Simard, Director Advanced Plant Safety & Licensing Advanced Reactor Programs f Westinghouse Electric Corporation Nuclear Energy Institute Energy Systems Business Unit 1776 Eye Street, N.W.

P.O. Box 355 Suite 300 Pittsburgh, PA 15230 Washington, DC 20006-3706 i Mr. Cindy L. Haag Ms. Lynn Connor Advanced Plant Safety & Licensing Doc-Search Associates Westinghouse Electric Corporation Post Office Box 34 Energy Systems Business Unit Cabin John, MD 20b28 ,

Box 355  :

P'ct> burgh, PA 15230 Mr. James E. Quinn, Projects Manager LMR and SBWR Programs he. S. M. Modro GE Nuclear Energy Nuclear Systems Analysis Technologies 175 Curtner Avenue, M/C 165 Lockhaed Idaho Technologies Company . San Jose, CA 95125 Post Office Box 1625 Idaho Falls, ID 83415 Mr. Robert H. Buchholz l GE Nuclear Energy- l Mr. Sterling Franks 175 Curtner Avenue, MC-781 '

U.S. Department of Energy San Jose, CA 95125 NE-50 19901 Germantown Road Barton Z. Cowan, Esq. ,

Germantown, MD 20874 Eckert Seamans Cherin & Mellott '

600 Grant Street 42nd Floor Mr. Frank A. Ross Pittsburgh, PA 15219 U.S. Department of Energy, NE-42 Office of LWR Safety and Technology Mr. Ed Rodwell, Manager 19901 Germantown Road PWR Design Certification Germantown, MD 20874 Electric Power Research Institute 3412 Hillview Avenue Mr. Charles Thompson, Nuclear Engineer Palo Alto, CA 94303 AP600 Certification NE-50 19901 Germantown Road Germantown, MD 20874 l

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