ML072970605

Exigent License Amendment Request Re Alternative Containment Analysis Methodology Supporting Information - Gothic Model Input Files

ML072970605
Person / Time
Site:	Surry
Issue date:	10/24/2007
From:	Bischof G T Virginia Electric & Power Co (VEPCO)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
07-0693A, GL-04-002
Download: ML072970605 (6)

Text

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 October 24, 2007 U.S.Nuclear Regulatory Commission Attention:

Document Control Desk Washington, D.C.20555 Serial No.07-0693A NL&OS/GDM RO Docket Nos.50-280/281 License Nos.DPR-32/37 VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS 1 AND 2 EXIGENT LICENSE AMENDMENT REQUEST ALTERNATIVE CONTAINMENT ANALYSIS METHODOLOGY SUPPORTING INFORMATION

-GOTHIC MODEL INPUT FILES In an October 22, 2007 letter (Serial No.07-0693), Virginia Electric and Power Company (Dominion) requested an amendment to the licensing basis for Facility Operating License Numbers DPR-32 and DPR-37 for Surry Power Station Units 1 and 2, respectively.

The proposed amendment will permit the use of an alternate GOTHIC containment analysis methodology in support of the implementation of modifications to resolve Generic Safety Issue (GSI)191, Assessment of Debris Accumulation on PWR Sump Performance, as committed to in Dominion's response to Generic Letter 2004-02,"Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors." In support of the NRC review of the alternative methodology, Dominion provided a CD-ROM with GOTHIC model files to the NRC Project Manager, Mr.R.A.Jervey, on October 22, 2007.However, the CD-ROM contains information that is considered proprietary commercial information to Dominion.Consistent with 10 CFR 2.390(b)(1), Dominion is providing an affidavit in the attachment to this letter with the basis for withholding the information as proprietary.

Serial No.07-0693A Docket Nos.50-280/281 Page 2 of 3 If you have any questions or require additional information, please contact Mr.Gary D.Miller at (804)273-2771.Very truly yours, Gerald T.Bischof Vice President-Nuclear Engineering Attachment Application for Withholding and Affidavit of Gerald T.Bischof Commitments made in this letter: None.COMMONWEALTH OF VIRGINIA COUNTY OF HENRICO The foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, today by Gerald T.Bischof, who is Vice President-Nuclear Engineering, of Virginia Electric and Power Company.He has affirmed before me that he is dUly authorized to execute and file the foregoing document in behalf of that Company, and that the statements in the document are true to the best of his knowledge and belief.Acknowledged before me this of CctaJuv, 2007.My Commission

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Notary Public (SEAL)YIelD L.HULL NoIarY N:IIlC COINMI.......of YIf8InIO'*'I My COIMlIIII,n May 11, 101.

cc: U.S.Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center 61 Forsyth Street, SW Suite 23T85 Atlanta, Georgia 30303 Mr.J.E.Reasor, Jr.Old Dominion Electric Cooperative Innsbrook Corporate Center 4201 Dominion Blvd.Suite 300 Glen Allen, Virginia 23060 State Health Commissioner Virginia Department of Health James Madison Building-i h floor 109 Governor Street Suite 730 Richmond, Virginia 23218 Mr.J.T.Reece NRC Senior Resident Inspector North Anna Power Station Mr.S.P.Lingam NRC Project Manager U.S.Nuclear Regulatory Commission One White Flint North Mail Stop 0-8 G9A 11555 Rockville Pike Rockville, Maryland 20852 Mr.R.A.Jervey NRC Project Manager U.S.Nuclear Regulatory Commission One White Flint North Mail Stop 0-8 G9A 11555 Rockville Pike Rockville, Maryland 20852 Serial No.07-0693A Docket Nos.50-280/281 Page 3 of 3 Serial No.07-0693A Docket Nos.50-280/281 ATTACHMENT Application for Withholding and Affidavit of Gerald T.Bischof Virginia Electric and Power Company Surry Power Station Units 1 and 2 Serial No.07-0693A Docket Nos.50-280/281 Affidavit Page 1 of 2 APPLICATION FOR WITHHOLDING AND AFFIDAVIT OF GERALD T.BISCHOF I, Gerald 1.Bischof, Vice President-Nuclear Engineering, state that: 1.I am authorized to execute this affidavit on behalf of Virginia Electric and Power Company (Dominion).

2.Dominion has submitted a CD-ROM that contains the electronic GOTHIC model files from the demonstration cases in Section 3.3 of Attachment 1 from Dominion letter dated October 22, 2007 (Serial No.07-0693).

The CD-ROM contains proprietary commercial information that should be held in confidence by the NRC pursuant to the policy reflected in 10 CFR§§2.390(a)(4) because: a.This information is being held in confidence by Dominion.b.This information is of a type that is held in confidence by Dominion, and there is a rational basis for doing so because the information contains sensitive commercial information concerning Dominion's containment analysis methodology.

c.This information is being transmitted to the NRC in confidence.

d.This information is not available in public sources and could not be gathered readily from other publicly available information.

e.Public disclosure of this information would create substantial harm to the competitive position of Dominion by disclosing confidential Dominion internal containment analysis methodology information to other parties whosecommercialinterests may be adverse to those of Dominion.Furthermore, Dominion has expended significant engineering resources in the development of the information.

Therefore, the use of this confidential information by competitors would permit them to use the information developed by Dominion without the expenditure of similar resources, thus giving them a competitive advantage.

Serial No.07-0693A Docket Nos.50-280/281 Affidavit Page 2 of 2 3.Disclosure pursuant to the policy reflected in 10 CFR§§2.390(a)(4).

Vice President-Nuclear Engineering COMMONWEALTH OF VIRGINIA COUNTY OF HENRICO The foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, today by Gerald T.Bischof, who is Vice President-Nuclear Engineering of Virginia Electric and Power Company.He has affirmed before me that he is duly authorized to execute and file the foregoing document in behalf of that company, and that the statements in the document are true to the best of his knowledge and belief.Acknowledged before me this of{2f!t!Jit<u

,2007.My Commission

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Notary Public (SEAL)VICKI L.HULL Notary Pubflc l commonwealth af VIrgInIa 1...2IMv CommIIIIon Ixpkea May 31.2810--