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Category:E-Mail
MONTHYEARML24026A2802024-01-25025 January 2024 Acceptance Review for Virgil C. Summer Relief Requests RR-5-V1, RR-5-V2, and RR-5-V3 (EPIDs L-2023-LLR-0067, L-2023-LLR-0068, and L-2023-LLR-0069) (Email) ML23270B8712023-09-27027 September 2023 NRR E-mail Capture - Draft RAIs for License Amendment Request (LAR) to Revise the Virgil C. Summer Nuclear Station (VCSNS) Unit 1 Emergency Plan (L-2023-LLA-0083) ML23193A9552023-07-12012 July 2023 NRR E-mail Capture - Acceptance Review for VC Summer and Surry Relief Request (L-2023-LLR-0029) ML23186A1392023-07-0505 July 2023 NRR E-mail Capture - Acceptance Review for VC Summer Emergency Plan (EP) License Amendment Request (LAR) (L-2023-LLA-0083) ML23131A1492023-05-10010 May 2023 2023 V.C. Summer Commercial Grade Dedication Inspection Information Request ML23044A3392023-02-13013 February 2023 NRR E-mail Capture - Acceptance Review for Change to Reactor Vessel Surveillance Capsule Schedule (L-2023-LLL-0002) ML23027A0122023-01-26026 January 2023 002 Radiation Safety Baseline Inspection Information Request ML23026A0152023-01-23023 January 2023 NRR E-mail Capture - Feb 14, 2023 Public Meeting with the Dominion Energy to Discuss a Planned Emergency Preparedness Submittal to Relocate the Emergency Operations Facility for the VC Summer Power Station - Dominion Slides ML22263A0502022-09-19019 September 2022 NRR E-mail Capture - Draft Request for Additional Information for Proposed Alternative Request RR-4-26 Extension of Steam Generator Primary Inlet Nozzle Dissimilar Metal Weld Inspection Interval V.C. Summer Unit 1 ML22194A9422022-07-13013 July 2022 NRC 50.59 Inspection (IP 71111.17T) Information Request ML22174A3552022-06-23023 June 2022 NRR E-mail Capture - Acceptance Review for Dominion Fleet LAR to Implement TSTF-554 (L-2022-LLA-0078) ML22173A0292022-06-17017 June 2022 NRR E-mail Capture - Acceptance Review for Summer to Defer Weld Examinations (L-2022-LLR-0052) ML22139A2302022-05-19019 May 2022 NRR E-mail Capture - Acceptance Review for Summer TS 4.6.2.1.d LAR (L-2022-LLR-0060) ML22139A2322022-05-19019 May 2022 NRR E-mail Capture - Acceptance Review for Summer TSTF-491 LAR (L-2022-LLR-0059) ML22084A4052022-03-25025 March 2022 NRR E-mail Capture - Acceptance Review for Summer Dissimilar Metal Weld Inspection Interval (L-2022-LLR-0033) ML22018A0272022-01-18018 January 2022 2022 All RFI Responses - Exercise and Program Inspections - Revl ML21333A1892021-11-29029 November 2021 NRR E-mail Capture - Draft RAI for Summer LAR Relocate Surveillance Frequencies to Licensee Control - RITSTF Initiative 5b, (TSTF-425) ML21253A1352021-09-0808 September 2021 Document Request for VC Summer Nuclear Station - Radiation Protection Inspection - Inspection Report 2021-04 ML21197A0432021-07-15015 July 2021 VCS ISI 2021004 RFI - Combined ML21187A1242021-06-28028 June 2021 10CFR Part 21 Update - Deviation Identified in the Bolting Utilized to Maintain Seismic Qualification ML21173A1782021-06-22022 June 2021 NRR E-mail Capture - Acceptance Review - Summer LAR Unit Staff Qualification Relocation TS to Quality Assurance Program Description (QAPD) ML21145A0222021-05-24024 May 2021 003 Radiation Safety Baseline Inspection Information Request ML21131A0402021-05-11011 May 2021 NRR E-mail Capture - V.C. Summer, Unit 1 - Final RAI for the Spring 2020 RFO Sgtir Review ML21125A1942021-05-0505 May 2021 NRR E-mail Capture - Virgil C. Summer Nuclear Station, Unit 1 - Acceptance Review (L-2021-LLA-0064) ML21020A0562021-01-20020 January 2021 Email Capture Upcoming V.C. Summer POV Inspection (IP71111.21N.02) Information Request ML20342A1822020-12-0707 December 2020 NRR E-mail Capture - Final RAI for Summer LAR - TS 3.6.4 ML20342A3822020-12-0707 December 2020 NRR E-mail Capture - Final RAIs for Summer Fs LOCA LAR ML20321A2112020-11-16016 November 2020 NRR E-mail Capture - Summer, Unit 1 - Final RAIs for the SG Tube Inspection Report Review ML20316A0122020-11-0404 November 2020 NRR E-mail Capture - V.C. Summer Nuclear Station, Unit 1 - Acceptance Review (L-2020-LLR-0141) ML20302A2032020-10-28028 October 2020 NRR E-mail Capture - V.C. Summer Nuclear Station, Unit 1 - Acceptance Review (L-2020-LLR-0141) ML20260H4262020-09-0303 September 2020 NRR E-mail Capture - Acceptance Review for Fleet Relief Request for Code Case N-885 ML20178A5892020-06-26026 June 2020 NRR E-mail Capture - Virgil C. Summer Nuclear Station, Unit 1 - Acceptance Review of the Fsloca LAR (L-2020-LLA-0124) ML20178A5932020-06-23023 June 2020 NRR E-mail Capture - VC Summer Unit Alternate Request RR-4-19 ML20178A5912020-06-23023 June 2020 NRR E-mail Capture - VC Summer Unit Alternate Request RR-4-21 ML20149K4262020-05-21021 May 2020 NRR E-mail Capture - V. C. Summer, Unit 1 - Acceptance of License Amendment Request (LAR-20-142) Related to TS 3.6.4, Containment Isolation Valves (L-2020-LLA-0092) ML19218A3742019-08-0606 August 2019 NRR E-mail Capture - Virgil C. Summer, Unit 1 -Acceptance of Relief Request (RR-4-20), Use of Encoded Phased Array Ultrasonic Examination Techniques in Lieu of Radiography ML19214A2732019-08-0202 August 2019 NRR E-mail Capture - Virgil C. Summer, Unit 1 - Acceptance of License Amendment Request to Change Company Name ML19211D5102019-07-30030 July 2019 NRR E-mail Capture - Virgil C. Summer Nuclear Station, Unit No. 1 - Request for Additional Information LAR-16-01490 NFPA-805 (Supplement to PRA RAI 03) ML19179A1262019-06-27027 June 2019 NRR E-mail Capture - Virgil C. Summer Nuclear Station, Unit No. 1 - Request for Additional Information LAR-16-01490 NFPA-805 Program Revisions ML19155A2752019-06-0404 June 2019 VC Summer 2019003 Rad Safety Inspection Document Request ML19140A2692019-05-17017 May 2019 Acceptance of Alternative Request (RR-4-23)to Utilize Code Case N-513-4 ML19105B1652019-04-15015 April 2019 NRR E-mail Capture - VC Summer SPRA Review - Clarification Questions on Credit for the Abeyance RCP Seals ML19102A0702019-04-11011 April 2019 NRR E-mail Capture - V.C. Summer, Unit 1: Relief Request (RR-4-22) Verbal Authorization Script ML19095A6532019-04-0404 April 2019 NRR E-mail Capture - Virgil C. Summer Nuclear Station, Unit No. 1 - Request for Additional Information NFPA-805 Program Revisions LAR ML19072A1442019-03-13013 March 2019 NRR E-mail Capture - Virgil C. Summer Nuclear Station, Unit No. 1 - Request for Additional Information LAR-16-01490 NFPA-805 Program Revisions ML19095A6582019-03-0404 March 2019 NRR E-mail Capture - VC Summer SPRA Review - Clarification Questions on Peer Review Findings and Plant Modifications ML19095A6672019-01-30030 January 2019 NRR E-mail Capture - VC Summer SPRA Clarification Questions on Circuit Analysis and Relay Replacement ML19031B4332019-01-29029 January 2019 Email Regarding VC Summer Units 2 & 3 Letter from Santee Cooper on Termination of COL ML19009A1052019-01-0909 January 2019 NRR E-mail Capture - Virgil C. Summer Nuclear Station, Unit No. 1 - Request for Additional Information LAR-10-02395, TS 3.8.2, D.C. Sources - Operating ML19009A5362019-01-0909 January 2019 NRR E-mail Capture - VC Summer Clarification Question on Fussell-Vesely Values 2024-01-25
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NRR-DMPSPEm Resource From: Williams, Shawn Sent: Wednesday, August 15, 2018 11:10 AM To: DALICK, SARA BETH
Subject:
Verbal Authorization Script for Relief Request RR-4 Service Water Pinhole leak in Discharge Line from B Train Emergency Diesel Generator Attachments: Verbal Authorization for VC Summer RR-4-17 .docx Ms. Dalick, On August 15, 2018, approximately 11am, the NRC authorized, via verbal authorization, the use of Relief Request RR-4-17 at V.C. Summer Nuclear Station, Unit 1. Attached is the script of the verbal authorization.
Sincerely, Shawn Williams Senior Project Manager, NRC 301-415-1009 1
Hearing Identifier: NRR_DMPS Email Number: 521 Mail Envelope Properties (BLUPR09MB07866DFD62573D37AC11A8F0903F0)
Subject:
Verbal Authorization Script for Relief Request RR-4 Service Water Pinhole leak in Discharge Line from B Train Emergency Diesel Generator Sent Date: 8/15/2018 11:09:39 AM Received Date: 8/15/2018 11:09:40 AM From: Williams, Shawn Created By: Shawn.Williams@nrc.gov Recipients:
"DALICK, SARA BETH" <SARA.DALICK@scana.com>
Tracking Status: None Post Office: BLUPR09MB0786.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 322 8/15/2018 11:09:40 AM Verbal Authorization for VC Summer RR-4-17 .docx 28785 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:
Recipients Received:
VERBAL AUTHORIZATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELIEF REQUEST RR-4-17 TEMPORARY ACCEPTANCE OF A FLAW IN SERVICE WATER PIPING VIRGIL C. SUMMER NUCLEAR STATION, UNIT 1 DOCKET NO. 50-395 AUGUST 15, 2018 Technical Evaluation read by Steve Ruffin, Chief of Piping and Head Penetrations Branch, Division of Materials and License Renewal, NRR By letter dated August 14, 2018, South Carolina Electric and Gas Company (the licensee) requested relief from the requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (ASME Code),Section XI, IWA-4000, at Virgil C. Summer Nuclear Station Unit 1.
Pursuant to Title 10 of the Code of Federal Regulations (10 CFR) 50.55a(z)(2), the licensee submitted proposed alternative Relief Request RR-4-17 to implement ASME Code Case N-513-3 "Evaluation Criteria for Temporary Acceptance of Flaws in Moderate Energy Class 2 or 3 Piping,Section XI, Division 1," with a minor modification, to disposition a pinhole leak in lieu of performing an ASME Code repair/replacement of an 8 inch, ASME Code Class 3 service water system piping component.
On August 13, 2018, the licensee discovered a small pin-hole leak on the weld neck flange downstream of valve XVB03121B-SW on a service water discharge line from the B-Train Emergency Diesel Generator. At the time, the licensee reported leak was spraying onto an adjacent wall and floor at approximately 20 ml/minute. The licensee calculated an allowable leak rate of 11.5 gallons/minute based on a 0.375-inch diameter postulated hole at 20 psig. The allowable leak rate is sufficiently low, so as to not challenge the structural integrity of the piping, affect the required safety function of the SW piping system, or create issues associated with flooding or water spray.
The licensee calculated that the observed degradation is temporarily acceptable as long as the average thickness of remaining material outside of the pin hole is greater than 0.046 inches within a diameter of 2.0 inches of the pin hole, the leakage from the subject leak remains below 11.5 gallons/minute, and the total B Train service water system leakage remain below 61.8 gallons/minute. Additionally, the licensee stated that it will perform the required augmented inspection per Code Case N-513-3, including monitoring the leak rate daily, ultrasonic testing every 30 days to monitor the flaw growth, and performing extent of condition inspections.
The NRC staff finds that there is sufficient margin in terms of flaw size and leak rate with respect to the licensees calculated acceptable limits, until the next refueling outage (RF24), currently scheduled to start on October 6, 2018. The NRC finds that the licensee has demonstrated that
Relief Request RR-4-17 will provide reasonable assurance that the structural integrity of the subject service water piping and its intended safety function will be maintained.
Authorization read by Michael Markley, Chief of Plant Licensing Branch II-1, Division of Operating Reactor Licensing, NRR As chief of the Plant Licensing Branch II-1, Office of Nuclear Reactor Regulation, I concur with the conclusions of the Piping and Head Penetrations Branch.
The NRC staff concludes that the proposed alternative provides a reasonable assurance of the structural integrity of the subject service water piping. The NRC staff finds that complying with the ASME Code,Section XI repair/replacement requirements would result in hardship or unusual difficulty without a compensating increase in the level of quality and safety.
Accordingly, the NRC staff concludes that the licensee has adequately addressed all of the regulatory requirements set forth in 10 CFR 50.55a(z)(2). Therefore, as of August 15, 2018, the NRC authorizes the use of Relief Request RR-4-17 at Virgil C. Summer Nuclear Station Unit 1, until the conclusion of the upcoming refueling outage (RF-24), currently scheduled to begin on October 6, 2018, or, before exceeding the temporary acceptance criteria of Code Case N-513-3, or before exceeding the acceptance criteria in the RR-4-17 relief request, whichever occurs first.
All other requirements in ASME Code,Section XI, for which relief was not specifically requested and approved in this relief request remain applicable, including third-party review by the Authorized Nuclear Inservice Inspector.
This verbal authorization does not preclude the NRC staff from asking additional clarification question(s) regarding the proposed alternative while preparing the subsequent written safety evaluation.