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MONTHYEARML0714103002007-05-16016 May 2007 Submittal of Stress Evaluation, Preliminary Engineering Evaluation of Insurge/Outsurge Tranients and Examination Results for the Completed Alloy 600 Pressurizer Nozzle Alternative Weld Repair CMP-023R1 Project stage: Request ML0717205282007-05-24024 May 2007 Use of Weld Overlays (TAC Nos. MD3903/3904) Project stage: Other ML0717002682007-06-15015 June 2007 Response to Request for Additional Information on 05/24/2007 Weld Overlays as an Alternative Repair Technique Project stage: Response to RAI ML0715000152007-06-26026 June 2007 Request for Withholding Information from Public Disclosure Project stage: Withholding Request Acceptance ML0720703562007-07-25025 July 2007 CMP-022R1 and Unit 2, CMP-023R1, Response to Request for Additional Information Weld Overlays as an Alternative Repair Technique Project stage: Response to RAI ML0727500642007-10-0101 October 2007 Relief Request CMP-022R1 Revised Non-Destructive Examination Requirements for the 'A' Safety Valve Pressurizer Nozzle Using Weld Overlay as an Alternative Repair Technique Project stage: Request ML0722202282007-12-19019 December 2007 Relief Requests CMP-022 and CMP-023 Regarding Use of Weld Overlays as an Alternative Repair Technique Project stage: Other 2007-05-24
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Category:Letter
MONTHYEARML24032A1112024-02-0101 February 2024 Owner'S Activity Report for North Anna, Unit 2, Refueling Outage N2R29 - First Period of the Fifth ISI Interval ML24032A4662024-01-16016 January 2024 Response to Comments on Draft Vpdes Permit No. VA0052451 ML24017A0802024-01-11011 January 2024 Notification of Licensed Operator Initial Examination 05000338/2024301 and 05000339/2024301 ML24003A8372024-01-0909 January 2024 Letter to Elizabeth Toombs, Thpo, Cherokee Nation, Notice of Availability of the Draft Site-Specific EIS for North Anna Power Station, Units 1 and 2, Subsequent License Renewal ML24003A8412024-01-0909 January 2024 Notice of Availability of the Draft Site-Specific Environmental Impact Statement for the North Anna Power Station, Units 1 and 2, Subsequent License Renewal ML24003A8502024-01-0909 January 2024 Letter to Wenonah Haire, Thpo, Catawba Indian Nation, Notice of Availability of the Draft Site-Specific EIS for North Anna Power Station, Units 1 and 2, Subsequent License Renewal ML23332A7272024-01-0909 January 2024 Notice of Availability of the Draft Site-Specific Environmental Impact Statement for the North Anna Power Station, Units 1 and 2, Subsequent License Renewal ML24003A8382024-01-0909 January 2024 Letter to G. Anne Richardson, Chief, Rappahannock Tribe, Inc., Notice of Availability of Draft Site-Specific Environmental Impact Statement for North Anna Power Station Units 1 and 2, Subsequent License Renewal ML24003A8482024-01-0909 January 2024 Notice of Availability of the Draft Site-Specific Environmental Impact Statement for the North Anna Power Station, Units 1 and 2, Subsequent License Renewal ML24003A8392024-01-0909 January 2024 Letter to Gerald Stewart, Chief, Chickahominy Indian Tribe, Eastern Division Re Re Notice of Availability of the Draft Site-Specific Environmental Impact Statement for North Anna Power Station Subsequent License Renewal ML24003A8472024-01-0909 January 2024 Letter to Tom Jonathan, Chief, Tuscarora Nation, Notice of Availability of the Draft Site-Specific EIS for North Anna Power Station, Units 1 and 2, Subsequent License Renewal ML24003A8492024-01-0909 January 2024 Letter to W. Frank Adams, Chief, Upper Mattaponi Tribe Re Re Notice of Availability of the Draft Site-Specific Environmental Impact Statement for North Anna Power Station Subsequent License Renewal ML24003A8462024-01-0909 January 2024 Notice of Availability of the Draft Site-Specific Environmental Impact Statement for the North Anna Power Station, Units 1 and 2, Subsequent License Renewal ML24003A8352024-01-0909 January 2024 Letter to Acee Watt, Thpo, United Keetoowah Band of Cherokee Indians in Oklahoma Re Notice of Availability of the Draft Site-Specific Environmental Impact Statement for North Anna Power Station Subsequent License Renewal ML24003A8422024-01-0909 January 2024 Letter to Paul Barton, Thpo, Eastern Shawnee Tribe of Oklahoma, Notice of Availability of Draft Site-Specific Environmental Impact Statement for North Anna Power Station Units 1 and 2, Subsequent License Renewal ML24003A8432024-01-0909 January 2024 Letter to Robert Gray, Chief, Pamunkey Indian Tribe, Notice of Availability of the Draft Site-Specific EIS for North Anna Power Station, Units 1 and 2, Subsequent License Renewal ML24003A8362024-01-0909 January 2024 Notice of Availability of the Draft Site-Specific Environmental Impact Statement for the North Anna Power Station, Units 1 and 2, Subsequent License Renewal ML24003A8442024-01-0909 January 2024 Letter to Russell Townsend, Thpo, Eastern Band of Cherokee Indians ML24003A8402024-01-0909 January 2024 Letter to Katelyn Lucas, Thpo, Delaware Nation, Oklahoma, Notice of Availability of Draft Site-Specific Environmental Impact Statement for North Anna Power Station Units 1 and 2, Subsequent License Renewal ML24003A8452024-01-0909 January 2024 Letter to Stephen Adkins, Chief, Chickahominy Indian Tribe, Notice of Availability of Draft Site-Specific Environmental Impact Statement for North Anna Power Station Units 1 and 2, Subsequent License Renewal ML23332A1852024-01-0404 January 2024 Notice of Availability of the Draft Site-Specific Environmental Impact Statement for the North Anna Power Station, Units 1 and 2, Subsequent License Renewal ML23332A0872024-01-0404 January 2024 Notice of Availability of the Draft Site-Specific Environmental Impact Statement for the North Anna Power Station, Units 1 and 2, Subsequent License Renewal ML23360A6352024-01-0404 January 2024 Letter to Dominion Availability for North Anna Units 1 and 2 Draft Site Specific Environmental Impact Statement ML23332A1472023-12-21021 December 2023 Issuance of Environmental Scoping Summary Report Associated with the Staff'S Review of the North Anna Power Station, Units 1 and 2, Subsequent License Renewal Application ML23283A3052023-12-20020 December 2023 Review of Appendix F to DOM-NAF2, Qualification of the Framatome ORFEO-GAIA and ORFEO-NMGRID CHF Correlations in the Dominion Energy VIPRE-D Computer Code (EPID L-2022-LLT-0003) (Nonproprietary) ML23346A0972023-12-11011 December 2023 License Amendment Request to Revise the Emergency Plan Relocation of the Technical Support Center - Response to NRC Request for Additional Information ML23346A1022023-12-11011 December 2023 2024 North Anna Power Station Brq Inspection Notification Letter ML24012A0942023-12-0707 December 2023 GL Report from Dominion Virginia Power Regarding Transfer of Devices ML24012A0892023-12-0707 December 2023 GL Registration from Dominion Virginia Power ML23334A2432023-11-30030 November 2023 Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation ML23362A0602023-11-29029 November 2023 ISFSI, Submittal of Cask Registration for Spent Fuel Storage IR 05000339/20234022023-11-27027 November 2023 Security Baseline Inspection Report 05000338 and 05000339/2023402 IR 05000338/20230032023-11-13013 November 2023 Integrated Inspection Report 05000338/2023003 and 05000339/2023003 ML23311A2042023-10-0909 October 2023 Annual Submittal of Technical Specification Bases Changes Pursuant to Technical Specification 5.5.13.d IR 05000338/20234032023-10-0505 October 2023 Reissue - North Anna Power Station - Cyber Security Inspection Report 05000338/2023403 and 05000339/2023403 (Cover Letter) ML23279A0612023-10-0505 October 2023 Paragon Energy Solutions LLC, Part 21 Final Report Re Potential Defect with Eaton Jd and Hjd Series Molded Case Circuit Breakers (Mccbs) ML23230A0502023-10-0202 October 2023 5 of the Quality Assurance Topical Report - Review of Program Changes ML23275A0992023-09-28028 September 2023 Subsequent License Renewal Application Third 10 CFR 54.21(b) Annual Amendment IR 05000338/20230112023-09-26026 September 2023 Quadrennial Focused Engineering Inspection Commercial Grade Dedication Report 05000338/2023011 and 05000339/2023011 ML23242A3482023-09-11011 September 2023 Cyber Security Inspection Report 05000338/2023403 and 05000339/2023403 - Cover ML23254A0242023-09-0606 September 2023 Paragon Energy Solutions LLC, Potential Defect with Eaton Jd and Hjd Series Molded Case Circuit Breakers (Mccbs) ML23249A2592023-09-0606 September 2023 Core Operating Limits Report Cycle 30, Pattern Ukr, Revision 0 ML23214A2022023-09-0505 September 2023 Staff Assessment of Updated Seismic Hazards Following the NRC Process for the Ongoing Assessment of Natural Hazards Information 2024-02-01
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VIRGINIA ELECTRIC AND POWER COMPANY RicHMOND, VIRGINIA 23261 May 16, 2007 U.S. Nuclear Regulatory Commission Serial No. 06-1007B Attention: Document Control Desk NLOS /ETS One White Flint North Docket No. 50-339 11555 Rockville Pike License No. NPF-7 Rockville, MD 20852-2738 VIRGINIA ELECTRIC AND POWER COMPANY (DOMINION)
NORTH ANNA POWER STATION UNIT 2 SUBMITTAL OF STRESS EVALUATION, PRELIMINARY ENGINEERING EVALUATION OF INSURGE/OUTSURGE TRANSIENTS AND EXAMINATION RESULTS FOR THE COMPLETED ALLOY 600 PRESSURIZER NOZZLE ALTERNATIVE WELD REPAIR CMP-023R1 In a letter, dated January 3, 2007 (Serial No. 06-1007), as supplemented on March 13, 2007 (Serial No. 06-1007A), Dominion requested approval to use a proposed alternative to apply dissimilar metal weld overlays for repair/replacement activities associated with Alloy 600 materials. That request contained alternative requirements for the North Anna Units 1 and 2 Inservice Inspection (ISI) programs to perform full structural preemptive weld overlays (PWOLs) to mitigate the potential for primary water stress corrosion cracking (PWSCC) susceptibility for those pressurizer nozzles containing Alloy 600.
As stated in our Relief Request, Dominion committed to provide: (1) the final stress analysis for five of the weld overlays and the preliminary engineering evaluation of insurge/outsurge transients for the surge line prior to entry into Mode 4; (2) the examination results of the weld overlays; and, (3) a discussion of any repairs to the overlay material and/or base material and the reason for the repair; within 14 days after the completion of the ultrasonic examination of weld overlay installations.
The examination results of the six completed PWOLs and the proprietary version of the stress analysis for the mitigated nozzles and the preliminary engineering evaluation of insurge/outsurge transients were submitted directly to Mr. S. P. Lingam of your staff on April 11, 2007. This letter documents the submittal of the above information and provides: 1) the non-proprietary version of the stress analysis and the insurge/outsurge evaluation for public disclosure (Attachment 1); 2) a proprietary version of revision 2 to calculation 32-9035736-002 (Attachment 2); 3) the required affidavit to support the classification of the information previously submitted to Mr. S. P. Ungam, as well as, the revised calculation in Attachment 2 (Attachment 3); and, 4) the following restatement of the examination results of the mitigated pressurizer nozzles.
AFto~
Serial No. 06-1007B Docket No. 50-339 Alternative Request CMP-023R1 Page 2 of 3 Six full structural mitigative PWOLs for the North Anna Unit 2 pressurizer safety, spray, relief, and surge nozzles were performed during the spring 2007 refueling outage (N2R18) in accordance with relief request CMP-023R1. The surface and volumetric examinations of the weld and base material were completed with no recordable indications. The examinations resulted in 100% coverage in accordance with relief request CMP-023R1 for both the preservice and inservice examination volumes. There were no repairs necessary to the weld overlay material or base metal during the installation of the PWOLs.
This letter also satisfies the 60-day notification commitments made in Dominion letter dated February 26, 2007 (Serial No. 07-0035B) and the NRC Confirmatory Action Letter dated March 29, 2007 for North Anna Unit 2.
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. Non-proprietary - PWOL Stress Analysis Calculations For Alloy 600 Pressurizer Nozzle Repair.
- 2. Proprietary - PWOL Stress Analysis Calculation 32-9035736-002.
- 3. Affidavit - PWOL Stress Analysis Results For Alloy 600 Pressurizer Nozzle Repair.
Commitments made in this letter:
None
Serial No. 06-1007B Docket No. 50-339 Alternative Request CMP-023R1 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. (without attachments)
Old Dominion Electric Cooperative Innsbrook Corporate Center 4201 Dominion Blvd.
Suite 300 Glen Allen, Virginia 23060 Mr. J. T. Reece (without attachments)
NRC Senior Resident Inspector North Anna Power Station Mr. S. P. Lingam NRC Project Manager U. S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 8-H12 Rockville, Maryland 20852 Mr. M. M. Grace (without attachments)
Authorized Nuclear Insurance Inspector North Anna Power Station