NSD-NRC-97-5006, Forwards WCAP-14845, Scaling Analysis for AP600 Containment Pressure During Design Basis Accidents, & Attachments Supporting NRC Review of WCAP-14845.WCAP-14845 Withheld. Proprietary Portion of Document Was Sent to Westinghouse
| ML20135E005 | |
| Person / Time | |
|---|---|
| Site: | 05200003 |
| Issue date: | 02/28/1997 |
| From: | Mcintyre B WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| To: | Quay T NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20135E009 | List: |
| References | |
| NSD-NRC-97-5006, NUDOCS 9703060191 | |
| Download: ML20135E005 (5) | |
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Ng, Westinghouse Energy Systems Bm 355 Electric Corporation Pittsbutgh Pennsylvania 15230 0355 NSD-NRC-97-5006 DCP/NRC0757 Docket No.: STN-52-003 February 28,1997 Document Control Desk U. S. Nuclear Regulatory Commission Washington, DC 20555 TO:
T.R. QUAY
SUBJECT:
WCAP-14845, " SCALING ANALYSIS FOR AP600 CONTAINMENT PRESSURE DURING DESIGN BASIS ACCIDENTS" AND ROAD MAP FOR CONTAINMENT PRESSURE SCALING OPEN ITEMS
Reference:
Westinghouse Letter NSD-NRC-97-5003, " Westinghouse Responses to NRC Requests for Additional Information on the AP600", February 27,1997.
Dear Mi. Quay:
Enclosed is one copy of WCAP-14845, " Scaling Analysis for AP600 Containment Pressure During Design Basis Accidents In addition, the following attachments are provided to support your review of WCAP-14845.
A.)
49 discussion items and 3 additional items raised by the NRC on the August 1996 scaling analysis.
B.)
Responses to 49 discussion items and 3 additional items raised by the NRC on the August 1996 scaling analysis, with references to where the information or revision is contained in WCAP-14845.
C.)
Discussion of items 425 and 3202 from the "AP600 Open Item Tracking System Database" The NRC reviewed the August Scaling Analysis document (NSD-NRC-96-4790, August 8,1996) transmitted by Westinghouse, and subsequently sent three telefaxes with a total of 49 discussion questions and 3 additional items (Attachment A). Westinghouse's proposed responses have been informaliy transmitted to the NRC and discussed in conference calls. The responses to the 49 discussion and 3 additional items, and where the answers are contained in WCAP-14845, are presented in Attachment B.
Review of the Westinghouse responses to the NRC questions on the August 1996 Scaling Analysis can be clarified by recognizing WCAP-14845 contains 1) new information that was not included in the 9703060191 970228
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DCP/NRC0757 February 28,1997 August document and has not been previously presented for NRC review,2) some reorganization of material contained in the August document, and 3) some changes to old information. These changes are a result of responding to the NRC questions. A summary of the major differences follows.
New material includes:
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- Energy scaling was added for all energy interactions between heat sinks and the containment gas. Energy scaling is developed for containment gas in Section 6.2, and in a subsection of each heat sink scaled in Section 7.
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The rate of change equations were valid.:ted by comparison to both transient and steady-state i
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LST operation in Section 10.2.1 and 10.2.2.
i The LST was scaled and compared to bcth AP600 and test measurements in Section 10.2.2.
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Reorganization includes:
The equation development presented in Appendix A of the August 1996 scaling analysis was a
included as Section 5 of WCAP-14845, so Appendix A no longer exists.
i Appendix B and the purpose it served in the August scaling analysis was eliminated by a
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complete defm' ition in WCAP-14845 of all pi groups, equations and calculations.
Changes include:
Two of the four LOCA time phases were redefined. Blowdown (0 to 27 sec) remains
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unchanged, Reflood was renamed Refill (27 to 85 sec),' Post Reflood was renamed Peak Pressure (85 to 1500 sec), and Peak Pressure was renamed Long Term ( 1500 sec and beyond). These new labels are considered more descriptive and are consistent with the PIRT j
(WCAP-14811) time phases.
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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 10CFR2,790. Therefore, it is requested that the Westinghouse proprietary information attached hereto be handled on a confidential basis and be withheld from public disclosures. A non-proprietary copy of
- the enclosed report will be provided within 60 days of this letter.
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
. other person or organization outsidc the Commission, the Office of riuclear Reactor Regulation, the Office of Nuclear Regulatory Research and the necessary subcontractors that have signed a proprietary 3100m -
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.NSD-NRC-96-5006 DCP/NRC0757 February 28,1997 1
non-disclosure agreement with Westinghouse without the express written approval of Westinghouse.
Correspondence with respect to the application for withholding should reference AW-97-1083, and should be addressed to B. A. McIntyre, Manager of Advanced Plant Safety and Licensing, J
Westinghouse Electric Corporation, P.O. Box 355, Pittsburgh, Pennsylvania, 15230-0355.
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B. A.
cintyr,
nager j
Advanced Plant Safety and Licensing l
jml Enclosure, Attachment cc:
D. Jackson, NRC (SE)
N. J. Liparulo, Westinghouse (w/o Enclosures / Attachments) i i
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COPYRIGHT 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 notwithstanding. 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 internal 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.
PROPRIETARY INFORMATION NOTICE e
Transmitted herewith are proprietary documents furnished to the NRC in connection with requests for l
generic and/or plant specific review and approval.
The justification for claiming the information so designated as proprietary is:
i (a) the information reveals the distinguishing aspects of a process (or component, 2
structure, tool, method, etc.) where prevention of its use by any of Westinghouse's competitors without license from Westinghouse constitutes a competitive economic advantage over other companies.
and (c)
Its use by a competitor would reduce his expenditure of resources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing a similar product.
i 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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