ML20217E996

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Summary of 970911 Meeting W/Westinghouse Electric Corp Re Fire Protection Issues for AP600 Design
ML20217E996
Person / Time
Site: 05200003
Issue date: 10/02/1997
From: Kenyon T
NRC (Affiliation Not Assigned)
To:
NRC (Affiliation Not Assigned)
References
NUDOCS 9710070337
Download: ML20217E996 (5)


Text

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NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 30seH001 4 . , * + ,o October 2, 1997 APPLICANT: Westinghouse Electrit Corporation b FACILITY: AP600

SUBJECT:

SUMMARY

OF SEPTEMBER 11,1997, MEETING TO DISCUSS FIRE PROTECTION ISSUES ON THE AP600 On September 11,1997, representatives of the U.S. Nuclear Regulatory Commission (NRC) and Westinghouse met to discuss fire protection issues for the AP600 design. Attachment 1 is a list of attendees.

At the start of the meeting, the staff provided Westinghouse with its positions regarding fire protection of safe shutdown capability (Attachment 2). These positions were discussed during a i

telecon on September 9,1997 The staff stated that these positions were predicated on its -

preference not to challenge the passive safety systems for most fires. The positions were discussed and clarified, and Westinghouse agreed to proceed based on compliance with the positions as discussed.

The participants then discussed fire protection features inside containm nt. The staff indicated that the material that separates the redundant cables inside containment shculd meet NFPA 251 test standards. The staff further expressed its concemt that testing has shown that 20 foot separation of equipment by itself may not sufficiently prevent a fire from propagating. Automatic suppression could be considered inside containment as an attemative means of protection.

Westinghouse agreed to develop a design and SSAR rationale for adequate protection of safety-related equipment inside containment.

The staff stated that openings in the operating deck of the containment raises a concem caused by the plume rising into a different fire zone, and that redundant equipment needs to be protected from the effect of such a plume. Westinghouse agreed to ensure adequate protectior of /l/

redundant equipment.

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i During the discussion on associated circuits, the staff requested WestinCnouse to address what criteria was followed for identifying and protecting associated circuits to ensure components cannot be spuriously actuated. Westinghouse was requested to identify equipment that could be spuriously activated, identify the worst case scenario, and specify design criteria to ensure that W#

these components cannot be spuriously actuated by a fire. Westinghouse agreed to provide a description of circuit types, such as power to de motorr, at the next meeting, including a ,

discussion of their resistance to spurious actuation. Westinghouse also agreed to develop a more complete description of AP600's overall resistance to spurious actuations. The method of documenting this information will be determined at a later date.

Caring the discussion on smoke control, the staff expressed its concems with Westinghouse's reliance on portable fans and ventilation ducts for smoke removal. Westinghouse was requested to address ingress and egress into stairwells during a fire. The applicant was also requested to perform an assessment of the smoke control systems provided for the AP600 against the NFPA standards and identify andjustify deviations from these standards. Westinghouse agreed.

9710070337 971002 PDR ADOCK 05200003 A PDR tJ031 gggl$lfli\)l}IkIkI

October 2, 1997 The next fire protection mceting was tentatively setup for September 25,1997. A draft of this meeting summary was provided to Westinghouse to allow them the opportunity to comment on the summary prior to issuance.

original signed by:

Thomas J Kenyon, Project Manager Standardization Project Directorate Division of Reactor Program Management Office of Nuclear Reactor Regulation Docket No.52-003 Attachments: As stated

[ cc w/atts: See next page DISTRIBUTION w/ attachments:

Docket File PDST R/F TKenyon

' PUBLIC BHuffman DTJackson JSebrosky DScaletti JNWilson DISTRIBUTION w/o attachments:

SCollins/FMiraglia,0-12 G18 BSheron,0-7 D25 RZimmerman,0-12 G18 JRoe DMatthews TQuay WDean,0-5 E23 ACRS (11) JMoore,0-15 B18 DOCUMENT NAME:A:FP-MTGSU.TJn OFFICE PM:PDg!, D:PDST c NAME TJKe :sg TRQuayM DATE 10/1//97 10/ V/97 OFFICIAL RECORD COPY

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Westinghouse Electric Corporation Docket No.52-003 cc: - Mr. Nicholas J. Liparulo, Manager Mr. Frank A. Ross Nuclear Safety and Regulatory Anaysis U.S. Department of Energy, NE-42 Nuclear and Advanced Technology Division Office of LWR Safsty and Technology Westinghouse Electric Corporation 19901 Germantown Road P.O. Box 355 Germantown, MD 20874 Pittsburgh, PA 15230 Mr. Russ Bell Mr. B. A. McIntyre Senior Project Manager, Programs Advanced Plant Safety & Licensing Nuclear Energy institute Westinghouse Electric Corporation 1776 i Street, NW Energy Systems Business Unit Suite 300 Box 355 Washington, DC 20006-3706 Pittsburgh, PA 15230 Ms. Lynn Connor Ms. Cindy L. Haag Doc-Search Associates Advanced Plant Safety & Licensing Post Office Box 34

! 'Nestinghouse Electric Corporation Cabin John, MD 20818 2nergy Systems Business Unit Eox 355 Dr. Craig D. Sawyer, Manager

, Pittsburgh, PA 15230 Advanced Reactor Programs l GE Nuclear Energy i Mr. M. D. Beaumont 175 Curtner Avenue, MC-754 Nuclear and Advanced Technology Division San Jose, CA 95125 Westinghouse Electric Corporation One Montrose Metro Mr. Robert H. Buchholz 11921 Rockville Pike GE Nuclear Energy Suite 350 175 Curtner Avenue, MC 781 Rockville, MD 20852 San Jose, CA 95125 Mr. Sterling Franks Barton Z. Cowan, Esq.

U.S. Department of Energy Eckert Seamans Cherin & Mellott NE-50 600 Grant Street 42nd Floor 19901 Germantown Road Pittsburgh, PA 1521g '

Germantown, MD 20874 Mr. Ed Rodwell, Manager Mr. Charies Thompson, Nuclear Engineer PWR Design Certifu:ation AP600 Certification Electric Power Research Institute NE 50 -

3412 Hillview Avenue 19901 Germantown Road Palo Alto, CA 94303 Germantown, MD 20874

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MEETING TO DISCUSS FIRE PROTECTION FOR THE AP600 DESIGN MEETING ATTENDEES SEPTEMBER 11,1997 NAME ORGANIZATION THOMAS KENYON NRC/NRR/PDST ED CONNELL NRC/NRR/SPLB PAT MADDEN NRC/NRR/SPLB DON HUTCHINGS WESTINGHOUSE TOM HAYES WESTINGHOUSE STEVE PLOYHAR BECHTEL JIM WINTERS WESTINGHOUSE TERRY SCHULZ WESTINGHOUSE FT JOHNSON WESTINGHOUSE Attachment 1

. . . r AP 600 Fire Protection DSSA Positions (9/97)

The use of ADS is no.t acceptable for use to achieve safe shutdown following a fire. PRHR or the normal systems shall be used.

If PRHR is relied upon, protection of safe shutdown cables inside containment may need to be enhanced beyond the criteria specified in the BTP (fire rated cables, auto suppression, barriers, etc.) in order to address locations such as V108A & V108B.

Automatic suppression shall be provided in those plant areas (safety or non-safety) outside containment that result in a demand for plant shutdown.

Safe Shutdown as defined by Westinghouse (420 F- 200 F) is acceptable as the licensing basis for the AP 600 w/ the enhanced capability of the RNS system to be available following a fire, and the inciusion of the above listed fire protection provisions.

s Attachment 2

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