ML20081G030

Forwards Nonproprietary & Proprietary Versions of Advance Copy of Rev 3 to Simplified Passive Alwr Plant Program AP600 Pra. Proprietary Version Withheld

ML20081G030
Person / Time
Site:	05200003
Issue date:	03/15/1995
From:	Liparulo N WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:	Borchardt R NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML19325F515	List: ML20081G030 ML20081G036 NRC-95-4418, Forwards Nonproprietary & Proprietary Versions of Advance Copy of Rev 3 to Simplified Passive Alwr Plant Program AP600 Pra
References
NTD-NRC-95-4418, NUDOCS 9503220425
Download: ML20081G030 (4)

Text

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Westinghouse Energy Systems Ba 355

! Ptfisburgh Pennsylvania 15230-0355 Electric Corporation -

l NTD-NRC-95-4418 i

DCP/NRC0288 Docket No.: STN-52-003 March 15,1995

l. Document Control Desk I U.S. Nuclear Regulatory Commission Washington, D. C., 20555 j

l ATTENTION: R.W.BORCHARDT

SUBJECT:

ADVANCE COPY OF REVISION 3 CHAI'fERS OF THE AP600 PROBABILISTIC RISK ASSESSMENT 5

Dear Mr. Borchardt:

t To expedite the NRC AP600 Design Certification review, Enclosure 1 is an advance copy of several chapters of Revision 3 of the AP600 Probabilistic Risk Assessment (PRA) Report. The enclosure

. contains an evaluation of conditional human error pro ab bility calculations in support of DSER open item 19.l.3.1-17, a complete requantification of the Level i PRA to include the conditional human l crror probabilities, and a requantification of the Level 2 and 3 PRA based on the Level 1 PRA results.

Revision 3 will also contain the instrumentation and control system chapters and the results chapter.

The enclosure is in the form of replacement pages for the Level 1 PRA chapters and in the form of new chapters for the Level 2 and 3 PRA. Included with each set are change page instructions. Four sets of this advance copy of Revision 3 to the PRA have been sent to Mr. Tom Kenyon.

Enclosure 2 of this letter is revision 1 of WCAP-13275, AP600 Probabilistic Risk Assessment Fault Trees. This WCAP contains the at-power conditions fault trees used in Revisions 2 and 3 of the AP600 PRA. Ten copies of WCAP-13275 have been sent to Mr. Tom Kenyon.

The Westinghouse Electric Corporation copyright notice, proprietary information notice, application for

% withholding and affidavit are attached.

This submittal contains Westinghouse proprietary information consisting of trade secrets, commercial information or financial information which we consider privileged or confidential pursuant to 10CFR9.17(a)(4). Therefore, it is requested that the Westinghouse proprietary information attached hereto be handles on a confidential basis and be withheld from public disclosures.

This material is for your internal use only and may be used for the purpose for which it is submitted, It should not be otherwise used, disclosed, duplicated, or disseminated, in whole or in part, to any E other person or organi7.ation outside the Commission, the Office of Nuclear Reactor Regulation, the Office of Nuclear Regulatory Research and the necessary subcontractors that have signed a proprietary -

non-disclosure agreement with Westinghouse without the express written approval of Westinghouse.

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NTD-NRC-95-4418 March 15,1995 DCP/NRCO288 Correspondence with respect to the application for withholding should reference AW-95-789, and should be addressed to N. J. Liparuto, Manager of Nuclear Safety Regulatory and Licensing Activities, Westinghouse Electric Corporation, P.O. Ilox 355, Pittsburgh, Pennsylvania, 15230-0355.

Please contact Ilrian A. McIntyre on (412) 374-4334 if you have any questions conceming this transmittal.

/

LY Nicholas J. Liparulo, Manager W/

Nuclear Safety Regulatory and Licensing Activities

/njs.

Enclosures cc: R. liasselberg, NRC (w/o enclosures)

E. Ilutcher, NRC (w/o enclosures)

11. A. McIntyre, Westinghouse

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r COPYRIGIIT NOTICE The reports transmitted herewith each bear a Westinghouse copyright notice. The NRC is permitted to make the number of copies of the information contained in these reports which are necessary for its internal use in connection with generic and plant-specific reviews and approvals as well as the issuance, denial, amendment, transfer, renewal, modification, suspension, revocation, or violation of a license, permit, order, or regulation subject to the requirements of 10 CFR 2.790 regarding restrictions on public disclosure to the extent such information has been identified as proprietary by Westinghouse, copyright protection not withstanding. With respect to the non-proprietary versions of these reports, the NRC is permitted to make the number of copies beyond those necessary for its intemal use which are necessary in order to have one copy available for public viewing in the appropriate docket files in the public document room in Washington, D.C. and in local public document rooms as may be required by NRC regulations if the number of copies submitted is insufficient for this purpose. Copies made by the NRC must include the copyright notice in all instances and the proprietary notice if the original was identified as proprietary.

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i PROPRIETARY INFORMATION NOTICE l

Transmitted herewith are proprietary and/or non-proprietary versions of documents furnished to the NRC in connection with requests for generic and/or plant specific review and approval.

In order to conform to the requirements of 10 CFR 2.790 of the Commission's regulations concerning the protection of proprietary information so submitted to the NRC, the information which is proprietary in the proprietary versions is contained within brackets, and where the proprietary information has been deleted in the :an-proprietary versions, only the brackets remain (the information that was contained within the brackets in the proprietary versions having been deleted). The justification for claiming the information so designated as proprietary is indicated in both versions by means of lower case letters (a) through (f) contained within parentheses located as a superscript immediately following the brackets enclosing each item of information being identified as proprietary or in the margin opposite such information. These lower case letters refer to the types of information Westinghouse customarily holds in confidence identified in Section (4)(ii)(a) through (4)(ii)(f) of the affidavit accompanying this transmittal pursuant to 10 CFR2.790(b)(1).

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