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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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June 9, 2014
Kevin Hacker, Chair NDE Integration Committee Dominion Generation Innsbrook Technical Center 5000 Dominion Boulevard Glen Allen, VA 23060
Dear Mr. Hacker:
In response to the five large stress corrosion cracks discovered in the inlet hot leg steam generator nozzle dissimilar metal weld (DMW) at North Anna Power Station Unit 1, the industry formed the nondestructive examination (NDE) Improvement Focus Group (NIFG).
The NIFG efforts focused on DMWs where site-specific mockups have been used and non-encoded examinations conducted. NIFG tasks not yet completed have been transferred to the NDE Integration Committee, of which you are the chair.
In 2013, the Electric Power Research Institute published the following reports to provide guidance for nuclear power plant owners with respect to improving the reliability of NDE:
- 1) Report 300200091, "Nondestructive Evaluation: Guideline for Conducting Ultrasonic Examinations of Dissimilar Metal Welds, Revision 1" 2) Report 3002000204, "Nondestructive Evaluation: Performance Demonstration Initiative (PDI) Guidance for Improved Reliability in Ultrasonic Examinations"
These reports include:
- 1) Performance Demonstration Initiative (PDI), Site Specific Configuration Mockup Requirements for Dissimilar Metal Welds, Revision C 2) Guidelines For The Application Of Team Scanning For Ultrasonic Examination of Dissimilar Metal Welds (DMW)
NIFG requested Staff review of these guidance documents. The Staff provided comments to NIFG on these guidance documents, and these comments were discussed with NIFG at public meetings held on February 28, 2012 and June 4, 2013. These comments provided to NIFG and NIFG's decision to not address the comments by revising the guidance documents were discussed during a public meeting held on January 7-9, 2014. As an action item from the January 2014 meeting, NIFG requested the Staff to formally transmit their comments by letter to NIFG. This letter, including Enclosures 1 and 2 "NRC Staff Concerns with: "Performance Demonstration Initiative (PDI), Site Specific Configuration Mockup Requirements for Dissimilar Metal Welds, Revision C" and "NRC Staff Concerns with "Guidelines For The Application Of
Team Scanning For Ultrasonic Examination of Dissimilar Metal Welds," is provided to NIFG to complete this action item.
The Staff believes that these comments to be substantive and necessary to improve the
performance of NDE when using either site spec ific mockups or team scanning. The NRC staff also requests that the NDE Integration Committee provide a response to these comments.
Should you have any questions regarding this letter, please contact Stephen Cumblidge at
(301) 415-2823
Sincerely,
/RA/ Timothy Lupold, Chief Component Performance NDE and Testing Branch Division of Engineering Office of Nuclear Reactor Regulation
Enclosures:
1 and 2 as stated
Should you have any questions regarding this letter, please contact Stephen Cumblidge at (301) 415-2823 Sincerely,
/RA/
Timothy Lupold, Chief Component Performance NDE and Testing Branch Division of Engineering Office of Nuclear Reactor Regulation
Enclosures:
1 and 2 as stated
cc: SCumblidge CNove WNorris
DISTRIBUTION
- SCumblidge CNove WNorris
ADAMS Accession Number: ML14099A291 OFFICE NRR/DE/EPNB NRR/DE/EPNB RES/DE/CIB NAME TLupold SCumblidge CNove DATE 06/09/2014 5/22/2014 05/22/2014 OFFICIAL RECORD COPY
ENCLOSURE 1 U.S. Nuclear Regulatory Commission (NRC) Staff Concerns with "Performance Demonstration Initiative, Site Specific Configuration Mockup Requirements for Dissimilar Metal Welds, Revision C"
These comments were given at the Public Meeting on February 28, 2013 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML13071A165) and have not yet been addressed:
Requirements with respect to quantity, size, type, and locations of implanted flaws in the mockups need to be well-defined. One flaw in each orientation is insufficient as one flaw cannot cover a range of sizes, angles, or locations. Using only small flaws or one flaw location does not cover the range of possibilities in the field.
Designing robust acceptance criteria for open testing is challenging, it is possible that blind testing is simpler than open testing. Predetermined and quantitative acceptance criteria need to
be developed prior to testing.
Modelling of the ultrasonic search unit should be mandatory.
Paragraph 10.2 should be struck from the document as it is unnecessary and the language is open to abuse.
In addition to the Authorized Nuclear Inservice Inspector (ANII), the staff would like the
performance demonstration administrator (PDA) to review and approve the procedure and technical basis document as the new procedure would be considered qualified.
The staff believes that the Technical Basis Document should be sent to the PDA and that it becomes part of the record for equipment, procedure and personnel.
ENCLOSURE 2 U.S. Nuclear Regulatory Commission Staff Concerns with the Concept of Team Scanning These comments were given at the public meeting held on June 4, 2013 (ADAMS Accession No. ML13159A012) and have not yet been addressed. The comments were given in the context of the proposed testing of team scanning that was conducted in July of 2013, after these comments were provided. The testing described in the presentation has been completed and represented a proof of concept of team scanning under ideal conditions. The comments are as follows: The implementation of team scanning in the field is performed under a wide range of conditions. For example, inspectors may or may not be able to see each other, inspectors may or may not have worked together before, and the training levels of inspectors can vary greatly. There has been no work done to date to determine the important variables in team scanning or the effects of these variables on the effectiveness of the scanning. How can the NRC staff be assured that team scanning is effective in the field if the effects of these variables are not known?
American Society of Mechanical Engineers Boiler and Pressure Vessel Code,Section XI, Appendix VIII, describes a minimum list of essential variables, but does not take team scanning variables in to account. Which variables in team scanning should be considered essential? Should procedures have to list the team design as an essential variable?
Many variables in team scanning can be elimi nated by limiting the implementation of team scanning. Requiring line of sight, direct communication, and requiring both parties to have a view of the instrumentation would significantly reduce the uncertainties caused by team scanning. Other variables can be eliminated by establishing formal requirements such as minimum team-scanning training requirements and minimum team scanning experience
requirements.