ML081960492
| ML081960492 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 07/02/2008 |
| From: | Gerald Bichof Virginia Electric & Power Co (VEPCO) |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 08-0379 | |
| Download: ML081960492 (10) | |
Text
VIRGINIA ELECTRIC AND POWER COMPANY RicHMOND, VIRGINIA 23261 July 2, 2008 U.S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738 Serial No.
08-0379 NLOS /ETS Docket Nos. 50-338/339 License Nos. NPF-4/7 VIRGINIA ELECTRIC AND POWER COMPANY (DOMINION)
NORTH ANNA POWER STATION UNITS 1 AND 2 FULL STRUCTURAL PREEMPTIVE WELD OVERLAYS REVISED STRESS ANALYSIS FOR PRESSURIZER SPRAY NOZZLES In letters dated May 16, 2007, October 4, 2007 and December 1.8, 2007 (Serial Nos. 06-1007B, 07-0656, and 07-0794, respectively), Dominion provided the stress analysis results for the weld overlays repair associated with Alloy 600 materials for North Anna Units 1 and 2.
Full structural preemptive weld overlays (PWOLs) were performed on six welds in each unit to mitigate the potential for primary water stress corrosion cracking (PWSCC) susceptibility. Subsequent to the submittal of the stress calculation for the spray nozzles in the May 16, 2007 letter, AREVA discovered an error in the North Anna (NA) spray nozzle ASME analysis.
The error resulted in non-conservative thermal transient analysis. An evaluation was performed at the time and concluded that during the interim period, until the revised analyses were completed, there would be no operability concerns and that North Anna was acceptable for operation with this spray nozzle issue for 5 years from the restart after weld overlay implementation.
The reanalysis has been completed and it demonstrates that the spray nozzle weld overlays are acceptable and meet all design requirements. The attachments to this letter provide the revised stress analysis for the Unit I and 2 Pressurizer spray nozzles.
To conform to the requirements of 10 CFR 2.390 concerning the protection of proprietary information, the proprietary information provided in Attachment 1 is contained within brackets.
Attachment 2 has been redacted to provide a non-proprietary version of the requested information. Where the proprietary information has been deleted in the non-proprietary version only the brackets remain (i.e., the information that was contained within the brackets in the proprietary version has been redacted). The basis for redacting certain information as proprietary is provided in the affidavit provided in Attachment 3, pursuant to 10 CFR 2.390(b)(1).
0&r7
Serial No. 00-0379 Docket Nos. 50-338/339 Revised Stress Analysis for Pressurizer Spray Valves Page 2 of 3 If you have any questions regarding this submittal, please contact Mr. Thomas Shaub at (804) 273-2763.
Very truly yours, Gerald T. Bischof Vice President - Nuclear Engineering Attachments:
- 1. Revised Stress Analysis Calculations for Pressurizer Spray Nozzles - Proprietary
- 2. Revised Stress Analysis Calculations for Pressurizer Spray Nozzles -Non-Proprietary
- 3. Affidavits Commitments made in this letter: None
Serial No. 00-0379 Docket Nos. 50-338/339 Revised Stress Analysis for Pressurizer Spray Valves Page 3 of 3 cc:
U.S. Nuclear Regulatory Commission (without attachments)
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 NRC Senior Resident Inspector (without attachments)
North Anna Power Station NRC Project Manager (without attachments)
U. S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 0 -8 G9A Rockville, Maryland 20852 Mr. M. M. Grace (without attachments)
Authorized Nuclear Insurance Inspector North Anna Power Station
Serial No. 08-0379 Docket Nos. 50-338/339 ATTACHMENT 3 AREVA AFFIDAVITS REVISED STRESS ANALYSIS CALCULATIONS FOR PRESSURIZER SPRAY NOZZLES Virginia Electric and Power Company (Dominion)
North Anna Power Station Units I and 2
AFFIDAVIT COMMONWEALTH OF VIRGINIA
)
) ss.
CITY OF LYNCHBURG
)
- 1.
My name is Gayle F. Elliott. I am Manager, Product Licensing, for AREVA NP Inc. and as such I am authorized to execute this Affidavit.
- 2.
I am familiar with the criteria applied by AREVA NP to determine whether certain AREVA NP information is proprietary. I am familiar with the policies established by AREVA NP to ensure the proper application of these criteria.
- 3.
I am familiar with the AREVA NP information contained in the Calculation Summary Sheet 32-9043015-003 entitled, "North Anna Units 1 & 2 PZR Spray Nozzle Weld Overlay Crack Growth Evaluation," dated June 2008 and referred to herein as "Document."
Information contained in this Document has been classified by AREVA NP as proprietary in accordance with the policies established by AREVA NP for the control and protection of proprietary and confidential information.
- 4.
This Document contains information of a proprietary and confidential nature and is of the type customarily held in confidence by AREVA NP and not made available to the public. Based on my experience, I am aware that other companies regard information of the kind contained in this Document as proprietary and confidential.
- 5.
This Document has been made available to the U.S. Nuclear Regulatory Commission in confidence with the request that the information contained in this Document be withheld from public disclosure. The request for withholding of proprietary information is made in accordance with 10 CFR 2.390. The information for which withholding from disclosure is A
requested qualifies under 10 CFR 2.390(a)(4) "Trade secrets and commercial or financial information."
- 6.
The following criteria are customarily applied by AREVA NP to determine whether information should be classified as proprietary:
(a)
The information reveals details of AREVA NP's research and development plans and programs or their results.
(b)
Use of the information by a competitor would permit the competitor to significantly reduce its expenditures, in time or resources, to design, produce, or market a similar product or service.
(c)
The information includes test data or analytical techniques concerning a process, methodology, or component, the application of which results in a competitive advantage for AREVA NP.
(d)
The information reveals certain distinguishing aspects of a process, methodology, or component, the exclusive use of which provides a competitive advantage for AREVA NP in product optimization or marketability.
(e)
The information is vital to a competitive advantage held by AREVA NP, would be helpful to competitors to AREVA NP, and would likely cause substantial harm to the competitive position of AREVA NP.
The information in the Document is considered proprietary for the reasons set forth in paragraphs 6(b) and 6(c) above.
- 7.
In accordance with AREVA NP's policies governing the protection and control of information, proprietary information contained in this Document have been made available, on a limited basis, to others outside AREVA NP only as required and under suitable agreement providing for nondisclosure and limited use of the information.
- 8.
AREVA NP policy requires that proprietary information be kept in a secured file or area and distributed on a need-to-know basis.
- 9.
The foregoing statements are true and correct to the best of my knowledge, information, and belief.
SUBSCRIBED before me this ___-_ _
day of -2Ml*
2008.
K_)
Sherry L. McFaden NOTARY PUBLIC, COMMONWEALTH OF VIRGINIA MY COMMISSION EXPIRES: 10/31/10 Reg. # 7079129 SHERRYI.L MCFADIN Notaoy Public j
Commonwealth of Virginia I
7079129 My Commission Expires Oct 31, 20101
AFFIDAVIT COMMONWEALTH OF VIRGINIA
)
) ss.
CITY OF LYNCHBURG
)
- 1.
My name is Gayle F. Elliott. I am Manager, Product Licensing, for AREVA NP Inc. and as such I am authorized to execute this Affidavit.
- 2.
I am familiar with the criteria applied by AREVA NP to determine whether certain AREVA NP information is proprietary. I am familiar with the policies established by AREVA NP to ensure the proper application of these criteria.
- 3.
I am familiar with the AREVA N P information contained in the Calculation Summary Sheet 32-9035736-005 entitled, "North Anna Units I & 2 Pressurizer - Spray Nozzle Weld Overlay Analysis," and referred to herein as "Document." Information contained in this Document has been classified by AREVA NP as proprietary in accordance with the policies established by AREVA NP for the control and protection of proprietary and confidential information.
- 4.
This Document contains information of a proprietary and confidential nature and is of the type customarily held in confidence by AREVA NP and not made available to the public. Based on my experience, I am aware that other companies regard information of the kind contained in this Document as proprietary and confidential.
- 5.
This Document has been made available to the U.S. Nuclear Regulatory Commission in confidence with the request that the information contained in this Document be withheld from public disclosure. The request for withholding of proprietary information is made in accordance with 10 CFR 2.390. The information for which withholding from disclosure is
requested qualifies under 10 CFR 2.390(a)(4) "Trade secrets and commercial or financial information."
- 6.
The following criteria are customarily applied by AREVA NP to determine whether information should be classified as proprietary:
(a)
The information reveals details of AREVA NP's research and development plans and programs or their results.
(b)
Use of the information by a competitor would permit the competitor to significantly reduce its expenditures, in time or resources, to design, produce, or market a similar product or service.
(c)
The information includes test data or analytical techniques concerning a process, methodology, or component, the application of which results in a competitive advantage for AREVA NP.
(d)
The information reveals certain distinguishing aspects of a process, methodology, or component, the exclusive use of which provides a competitive advantage for AREVA NP in product optimization or marketability.
1(e)
The information is vital to a competitive advantage held by AREVA NP, would be helpful to competitors to AREVA NP, and would likely cause substantial harm to the competitive position of AREVA NP.
The information in the Document is considered proprietary for the reasons set forth in paragraphs 6(b) and 6(c) above.
- 7.
In accordance with AREVA NP's policies governing the protection and control of information, proprietary information contained in this Document have been made available, on a limited basis, to others outside AREVA NP only as required and under suitable agreement providing for nondisclosure and limited use of the information.
- 8.
AREVA NP policy requires that proprietary information be kept in a secured file or area and distributed on a need-to-know basis.
A
- 9.
The foregoing statements are true and correct to the best of my knowledge, information, and belief.
SUBSCRIBED before me this _
_0 day of 9UY L
,2008.
Sherry L. McFaden NOTARY PUBLIC, COMMONWEALTH OF VIRGINIA MY COMMISSION EXPIRES: 10/31/10 Reg. # 7079129