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MONTHYEARML15231A5852015-08-18018 August 2015 NRR E-mail Capture - (External_Sender) Information Requested to Support Closeout of NAPS CAL Item #9 Project stage: Request ML15015A5752015-12-24024 December 2015 Closure of Confirmatory Action Letter Regarding North Anna Power Station, Units 1 and 2 Project stage: Other 2015-12-24
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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 ML24044A2462024-02-0606 February 2024 001 Radiation Safety Baseline Inspection Information 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 - Formal Issuance of RAIs for Surry/North Anna Emergency Plans LAR ML23059A2282023-02-28028 February 2023 NRR E-mail Capture - Draft RAIs for Containment Buffer Change to Natb (L-2022-LLA-0162) ML23039A1712023-02-0808 February 2023 NRR E-mail Capture - Acceptance Review for Technical Support Center (TSC) Relocation (L-2023-LLA-0006) ML23018A0352023-01-17017 January 2023 NRR E-mail Capture - Acceptance Review for Fleet Report Re Appendix F of DOM-NAF-2-P (L-2022-LLT-0003) ML22342B1472022-12-0808 December 2022 NRR E-mail Capture - Acceptance Review for LAR Re NAPS Post LOCA Buffer Change (L-2022-LLA-0162) ML22335A4842022-12-0101 December 2022 NRR E-mail Capture - Acceptance Review for LAR North Anna Power Station - Units 1 and 2 and Surry Power Station - Units 1 and 2 Emergency Plan Staff Augmentation Times (L-2022-LLA-0166) ML22242A0452022-08-23023 August 2022 NRR E-mail Capture - Dominion GL 04-02 Response Draft RAIs (L-2017-LRC-0000) ML22174A3552022-06-23023 June 2022 NRR E-mail Capture - 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 - Audit Plan for Reactor Core Thermal-Hydraulics Using the VIPRE-D Appendix E Review ML21327A3652021-11-23023 November 2021 NRR E-mail Capture - Draft RAI for TSTF-577 LAR ML21326A1502021-11-22022 November 2021 NRR E-mail Capture - Acceptance Review for Relocation of Unit Staff Requirements to the QAPD LAR (L-2021-LLA-0195) ML21322A0962021-11-18018 November 2021 Final Request for Additional Information Set 5 - North Anna SLRA Safety Review (EPID No. L-2020-SLR-0000) - Email ML21312A0082021-11-0404 November 2021 Enclosure 2 - NAPS Draft SER Table A.1-1 Markup ML21312A0112021-11-0404 November 2021 Enclosure 3 - NAPS Draft SER Section 3 Comments ML21312A0012021-11-0404 November 2021 Comments on North Anna Draft SER ML21306A3302021-11-0202 November 2021 NRR E-mail Capture - Acceptance Review for TSTF-569 LAR ML21286A7372021-10-13013 October 2021 Additional Element Included in the Implementation Plan for the Surry Fuel Melt Safety Limit (SL) LAR ML21274A0022021-09-30030 September 2021 NRR E-mail Capture - 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) 2024-04-15
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1NRR-PMDAPEm Resource From:Diane Aitken (Generation - 6) [diane.aitken@dom.com]
Sent:Tuesday, August 18, 2015 3:57 PM To:Sreenivas, V
Subject:
[External_Sender] Information requested to support closeout of NAPS CAL Item #9 Attachments:
image001.gifV, Below is the information regarding CAL Item
- 9 that was discussed today during our 1:30 pm call. Please let me know if further information is need to close this CAL Item.
Thanks - Diane
CAL Item Number 9 - Time-Limiting Aging Analyses (TLAA) - Clarification in response to NRC Request of August 18, 2015:
The components reviewed in detail for TLAA are identified in Attachment 2 of Dominion Letter Serial No.13-143. Resulting moments at several locations (nodes) of the math models of each of these components from the results of dynamic analyses from the Mineral VA earthquake of August 23, 2011 were tabulated and compared to the previously calculated moments from North Anna's OBE. For th e majority of locations, the ratio of moments between the August 23, 2011 event and the OBE was less than unity.
At some locations, the ratio was larger than unity and these locations were reviewed in detail. These reviews can be described as follows:
(a) At some locations, the previously calculated cumulative usage factor (CUF) was extremely small thus there was ample margin to accommodate the small increase in the seismic stress. An example is a 6" hot leg safety injection branch line where the ratio of the resulting moments was 1.22, but the previous CUF was only 0.03, thus the increase was considered acceptable.
(b) At some locations, Westinghouse generic OBE loads were used in the previous analyses, which provided a significant margin. An example is the inlet nozzle of reactor coolant pump where the Westinghouse OBE moment was 20180 in-kip, compared to 7606 in-kip from the Mineral event of August 23, 2011. Another example is a 2" branch line CVCS Loop Fill connection to Cross-over leg, where the ratio of the moments was 1.56, however, the branch line was qualified using significantly higher seismic loads per WCAP-8914, Vol. 1&2, thus no fatigue concern existed at this location. (c) At some locations, the CUF was primarily governed by thermal transients at the gross discontinuity and not by the seismic loading. Therefore, marginal increases in seismic moment were considered acceptable. An example is the Low Head Safety Injection branch line where the ratio of the moments was 1.23; the CUF was 0.07, which was primarily due to thermal transients.
It should also be noted that the strong motion durations of the Mineral earthquake of August 23, 2011 ranged from 1 to 3 second in the three or ientations, thus producing only a small number of alternating stress cycles. In summary, the August 23, 2011 earthquake had an insignificant effect on the component fatigue and previous TLAAs.
2
Diane E. Aitken Dominion Corporate Licensing
Innsbrook Technical Center, 2SE
804-273-2694 office 804-310-6552 cell diane.aitken@dom.com Please consider the environmen t before printing this e-mail.
CONFIDENTIALITY NOTICE: This electronic message contains information which may be legally confidential and or privileged and does not in any case represent a firm ENERGY COMM ODITY bid or offer relating thereto which binds the sender without an additional express written confirmation to that effect. The information is intended solely for the individual or entity named above and access by anyone else is unauthorized. If you are not the intended recipient, any di sclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you.
Hearing Identifier: NRR_PMDA Email Number: 2312 Mail Envelope Properties (CE3101AB4F73E84F9E63541CBF61CFC10111F1A8)
Subject:
[External_Sender] Information requeste d to support closeout of NAPS CAL Item
- 9 Sent Date: 8/18/2015 3:56:48 PM Received Date: 8/18/2015 3:56:52 PM From: Diane Aitken (Generation - 6)
Created By: diane.aitken@dom.com Recipients: "Sreenivas, V" <V.Sreenivas@nrc.gov> Tracking Status: None
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