ML073100827

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

ML073100827
Person / Time
Site:	Surry
Issue date:	11/02/2007
From:	Gerald Bichof Virginia Electric & Power Co (VEPCO)
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
07-0693B, TAC MD7033, TAC MD7034
Download: ML073100827 (6)

Text

VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 November 2, 2007 U.S. Nuclear Regulatory Commission Serial No. 07-0693B Attention: Document Control Desk NL&OS/GDM RO Washington, D.C. 20555 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 (TAC NOS. MD7033 AND MD7034)

ALTERNATIVE CONTAINMENT ANALYSIS METHODOLOGY REQUEST 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 land 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, "PotentialImpact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors."

To support review of the alternative methodology, the NRC requested Dominion provide a CD-ROM with GOTHIC model files. The model files are being provided on the attached CD-ROM.

The CD-ROM contains information that is considered proprietary commercial information to Dominion. Therefore, 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. 07-0693B 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 - Nuclearnglineering Attachments

1. CD-ROM C - GOTHIC model files 2 Application for Withholding and Affidavit of Gerald T. Bischof Commitments made in this letter: None.

Document Components 001 Base Case - ps-ful172a.GTH; 9,897,984 bytes; proprietary 002 New Case - ps-ful172alv5l .GTH; 9,967,616 bytes; proprietary 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 -6k day of 2007.

My Commission Expires:./A , .3/. ",*o Notary Public (SEAL) d4 VICKI L. NUU

1. MMM ovo Notaay Public

Serial No. 07-0693B Docket Nos. 50-280/281 Page 3 of 3 cc: U.S. Nuclear Regulatory Commission (w/o attachment 1)

Region II Sam Nunn Atlanta Federal Center 61 Forsyth Street, SW Suite 23T85 Atlanta, Georgia 30303 Mr. J. E. Reasor, Jr. (w/o attachment 1)

Old Dominion Electric Cooperative Innsbrook Corporate Center 4201 Dominion Blvd.

Suite 300 Glen Allen, Virginia 23060 State Health Commissioner (w/o attachment 1)

Virginia Department of Health James Madison Building - 7 th floor 109 Governor Street Suite 730 Richmond, Virginia 23218 Mr. J. T. Reece (w/o attachment 1)

NRC Senior Resident Inspector North Anna Power Station Mr. S. P. Lingam (w/o attachment 1)

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 (w/o attachment 1)

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. 07-0693B Docket Nos. 50-280/281 ATTACHMENT 2 Application for Withholding and Affidavit of Gerald T. Bischof Virginia Electric and Power Company Surry Power Station Units 1 and 2

Serial ,No. 07-0693B Docket Nos. 50-280/281 Affidavit Page 1 of 2 APPLICATION -FOR WITHHOLDING AND AFFIDAVIT OF GERALD T. BISCHOF I, Gerald T. 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 whose commercial interests 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. 07-0693B Docket Nos. 50-280/281 Affidavit Page 2 of 2

3. Disclosure pursuant to the policy reflected in 10 CFR §§ 2.390(a)(4).

Gerald T. Bischof 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 ,2:-- day of//O*2"1'/, 2007.

My Commission Expires: 31 .10 Notary Public (SEAL)

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