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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:E-Mail
MONTHYEARML24107A9112024-04-15015 April 2024 NRC to Fws, Follow-up on Request for Concurrence for North Anna SLR ML24107A9122024-04-11011 April 2024 Fws to NRC, Follow-up on Request for Concurrence for North Anna SLR ML24087A0102024-03-26026 March 2024 NRR E-mail Capture - Verbal Relief for North Anna Unit 1 - (ASME Code), Section XI, Subsection IWB-2430 ML24087A0112024-03-23023 March 2024 NRR E-mail Capture - Draft RAIs for Reactor Coolant Pump (RCP) Relief Request (L-2024-LLR-0022) ML24107B1562024-02-20020 February 2024 Cherokee Nation E.Toombs Na Removal Request ML23320A1122024-01-18018 January 2024 NRC to Fws, Concurrence with Endangered Species Act Determinations for North Anna Power Station, Units 1 and 2, Subsequent License Renewal, Issuance of Draft Supplemental Environmental Impact Statement, and Opportunity for Public Comment ML23355A2722023-12-21021 December 2023 NRR E-mail Capture - Schedule Revision for Emergency Preparedness Staff Augmentation Times License Amendment Request ML23318A1172023-11-13013 November 2023 NRR E-mail Capture - Formal Issuance of RAIs for North Anna Technical Support Center (TSC) License Amendment Request (LAR) (L-2023-LLA-0006) ML23257A2092023-09-14014 September 2023 NRR E-mail Capture - Formal Issuance of 2nd Round RAIs for Surry Units 1&2 and North Anna Units 1&2 Emergency Plans LAR ML23243A9862023-08-31031 August 2023 NRR E-mail Capture - Draft RAIs for EP Staff Augmentation Times LAR (L-2022-LLA-0166) ML23219A1602023-08-0707 August 2023 003 Radiation Safety Baseline Inspection Information Request ML23171B0522023-06-20020 June 2023 NRR E-mail Capture - RAI for Review of Appendix F to DOM-NAF-2-P (Redacted) ML23075A0232023-03-15015 March 2023 NRR E-mail Capture - RAI - License Amend Req (LAR) to Revise Tech Spec (Ts) 3.6.8 Limiting Condition for Operation to Remove Refueling Water Chemical Addition Tank and Replace the Containment Sump Buffer North Anna, 1 and 2 (L-2022-LLA-0162 ML23067A2162023-03-0707 March 2023 NRR E-mail Capture - RAI for North Anna, 1 & 2, Surry 1 & 2, Millstone, 2 & 3, Request for Approval of App. F Fleet Report DOM-NAF-2-P, Qual of the Framatome ORFEO-GAIA and ORFEO-NMGRID CHF Correlations in the Dominion VIPRE-D Computer Code ML23060A0932023-03-0101 March 2023 NRR E-mail Capture - 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Acceptance Review for Dominion Fleet LAR to Implement TSTF-554 (L-2022-LLA-0078) ML22104A0252022-04-14014 April 2022 NRR E-mail Capture - Dominion Presentation Slides for April 21, 2022 Public Meeting on Emergency Preparedness Submittal for the North Anna Power Station and the Surry Power Station ML22083A2102022-03-24024 March 2022 NRR E-mail Capture - Draft RAI - Relief Request N2-14-LMT-003 Fourth Ten Year Inservice Inspection Interval ML22032A0962022-02-0101 February 2022 002 Radiation Safety Baseline Inspection Information Request ML22018A0272022-01-18018 January 2022 2022 All RFI Responses - Exercise and Program Inspections - Revl ML22007A2672022-01-0707 January 2022 NRR E-mail Capture - North Anna, Unit 2, ASME Section XI Inservice Inspection Program Relief Request N2-14-LMT-003 Fourth Interval Third Period Limited Examinations (L-2021-LLR-0088) ML21335A0812021-12-0101 December 2021 NRR E-mail Capture - Acceptance Review for OMN-28 Request Alternative to ISTC-3700, Position Verification Testing (L-2021-LLR-0086) ML21334A1922021-11-30030 November 2021 NRR E-mail Capture - 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Acceptance Review for TSTF-577 LAR (L-2021-LLA-0158) ML21312A0072021-09-21021 September 2021 Enclosure 1 - E-mail - Enclosure B - NAPS SER App a - Dominion Comments 9-21-2021 ML21312A0032021-09-21021 September 2021 Enclosure 1 - E-mail - Enclosure a - Dominion Table A4.4-1 Clean Version ML21312A0022021-09-21021 September 2021 Enclosure 1 - E-mail - NAPS SLR SER Appendix a for Dominion Review ML21256A0672021-09-13013 September 2021 Final Request for Confirmation of Information Set 2 - North Anna SLRA Safety Review (EPID No. L-2020-SLR-0000) - Email ML21152A1722021-09-0707 September 2021 NRC to Fws, NRC Issuance of Draft Environmental Impact Statement for North Anna Subsequent License Renewal, Opportunity for Public Comment, and Endangered Species Act Determinations ML21238A0942021-08-25025 August 2021 Draft Request for Additional Information Set Z - North Anna SLRA Safety Review (EPID No. L-2020-SLR-0000) - Email ML21225A5512021-08-13013 August 2021 Discussion Point for Public Meeting Regarding Fire Protection Piping Cyclic Loading - Transmittal E-mail ML21195A2442021-07-13013 July 2021 NRR E-mail Capture - Draft RAI Appendix E to Topical Report DOM-NAF-2 Qualification of the Framatome BWU-I CHF Correlation in the Dominion Energy VIPRE-D Computer Code ML21188A1632021-07-0707 July 2021 Final Request for Additional Information Set 4 - North Anna SLRA Safety Review (EPID No. L-2020-SLR-0000) - Email ML21154A0152021-06-0101 June 2021 NRR E-mail Capture - Acceptance Review for Primary Grade Water LAR (L-2021-LLA-0082) ML21140A3682021-05-20020 May 2021 Response to North Anna Hardship (Temporary Staff Guidance Additional Guidance for FOF Inspections During the PHE) ML21140A3712021-05-19019 May 2021 FOF Discussion 2024-04-15
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From: Siva Lingam To: Tom.Shaub@dom.com Date: 5/24/2007 8:07:23 AM
Subject:
Re: USE OF WELD OVERLAYS AS AN ALTERNATIVE REPAIR TECHNIQUE (TAC NOS. MD3903/3904)
Please note the clarification for Question 2.
>>> David Tarantino 5/24/2007 7:58 AM >>>
- Siva, Thank you for arranging and forwarding the RAI below.
As a point of clarification for the licensee Question 2 (last sentence in parentheses) is posed as a statement in lieu of a question; however, we are seeking the licensee's standpoint on this matter.
I hope this clears up any potential confusion and if the licensee requires any additional clarification or explanation please let me know.
Thanks again, Dave
>>> Siva Lingam 5/23/2007 10:05 AM >>>
- Tom, The following questions relate to the relief request CMP022/023 that has been verbally approved by NRC on March 29, 2007. Due to ongoing NRC and Industry issues, we need further clarifications.
The following questions refer to Enclosure 1 of the Licensee's Alternative Request CMP-022R1/023R1 dated March 13, 2007.
The Licensee may review the Dominion response to the staff Request for Additional Information regarding a similar Relief Request for Millstone Unit 3 in Letters dated March 28 and April 23, 2007.
Question 1:
Section 2(a)(2)(c) does not specify the depth of the base metal that ultrasonic (UT) testing would be qualified to detect flaws after weld overlay installation. The staff believes that a region of the base metal MAY not be qualified. In such case, the staff considers that the initial flaw size assumed in the crack growth calculation should be the as-found flaw depth plus the postulated worst-case flaw in the unqualified region of the base metal. The postulated worst-case flaw size should be the depth of the base metal that UT is not qualified (to examine). The initial flaw size should be clarified. See Millstone's response; ATTACHMENT 1 to DOMINION LETTER SERIAL NO. 07-0116A dated 04/23/2007.
Question 2:
IN Section 2(a)(2)(d), the current UT is not qualified to inspect inner 75% of the base metal once the weld overlay is installed on the pipe. Therefore, UT is not capable of detecting any indication that is connected to the inside surface of the pipe during pre-service inspection (the staff believes that the pre-service inspection is the post-installation pre-service inspection, not pre-installation inspection). See Millstone's response; ATTACHMENT 1 to DOMINION LETTER SERIAL NO. 07-0116A dated
04/23/2007.
Question 3:
In Section 3(b)(2), THE LICENSEE STATED THAT .......if flaws are found in the outer 25%
of the existing base metal or original weld and cannot be determined to be isolated from the inside diameter (ID) of the existing base metal or weld, will the flaw depth be conservatively sized by adding the thickness of the remaining 75% of the original existing base metal or weld thickness to the through wall dimension for any flaw growth calculations performed.
The Staff's position is that the Licensee will use the actual UT determined through wall dimension in the crack growth analysis for those flaws that do not intrude on the interface between the outer 25% of the original base metal or weld thickness and the inner 75% of the same existing materials and that can be determined by the qualified UT examination to not be connected to the interface between the outer 25% and the inner 75% of the base metal or weld. FOR THE ACTUAL UT DETERMINED FLAW IN THE OUTER 25% OF THE BASE METAL THAT IS CONNECTED TO THE INTERFACE BETWEEN THE OUTER 25% AND THE INNER 75% OF THE PIPE WALL THICKNESS, THE INITIAL FLAW SIZE WOULD BE THE AS-FOUND FLAW SIZE PLUS THE INNER 75% PIPE WALL THICKNESS. Clarify the initial flaw size that will be used in the crack growth calculation.
Question 4:
Section 3(c)(4) relating to accept flaws found in weld overlay. The licensee should add that IWB-3600 is not permitted to accept PWSCC flaws.
Siva P. Lingam Project Manager (NRR/DORL/LPL2-1)
North Anna and Surry Nuclear Stations Location: O8-D5 Mail Stop: O8-G9 Telephone: 301-415-1564 Fax: 301-415-1222 E-mail address: spl@nrc.gov CC: David Tarantino; John Tsao; Terence Chan Mail Envelope Properties (46557FFB.E55 : 13 : 35786)
Subject:
Re: USE OF WELD OVERLAYS AS AN ALTERNATIVE REPAIR TECHNIQUE (TAC NOS. MD3903/3904)
Creation Date 5/24/2007 8:07:23 AM From: Siva Lingam Created By: SPL@nrc.gov Recipients Action Date & Time dom.com Transferred 5/24/2007 8:07:43 AM Tom.Shaub (Tom.Shaub@dom.com)
nrc.gov OWGWPO03.HQGWDO01 Delivered 5/24/2007 8:07:31 AM TLC CC (Terence Chan) Opened 5/24/2007 3:33:35 PM nrc.gov TWGWPO02.HQGWDO01 Delivered 5/24/2007 8:07:28 AM DMT2 CC (David Tarantino) Opened 5/24/2007 8:07:34 AM JCT CC (John Tsao) Opened 5/24/2007 8:33:19 AM Post Office Delivered Route dom.com OWGWPO03.HQGWDO01 5/24/2007 8:07:31 AM nrc.gov TWGWPO02.HQGWDO01 5/24/2007 8:07:28 AM nrc.gov Files Size Date & Time MESSAGE 5861 5/24/2007 8:07:23 AM Options Auto Delete: No Expiration Date: None Notify Recipients: Yes Priority: Standard ReplyRequested: No Return Notification: None Concealed
Subject:
No Security: Standard To Be Delivered: Immediate Status Tracking: Delivered & Opened