Letter Sequence Approval |
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EPID:L-2022-LLA-0120, MTS - Meeting Summary - Public Meeting on March 28, 2023- Hatch RPV Head Closure Bolts LAR LAR (Approved, Closed) |
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MONTHYEARNL-22-0406, Request to Relax the Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Studs in Technical Specification Table 1.1-1, Modes2022-08-19019 August 2022
Request to Relax the Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Studs in Technical Specification Table 1.1-1, Modes
Project stage: Request
ML22258A1532022-09-15015 September 2022
NRR E-mail Capture - Acceptance Review - Hatch Closure Studs in TS Table 1.1-1 Modes LAR (L-2022-LLA-0120)
Project stage: Acceptance Review
ML22305A7032022-11-0101 November 2022
NRR E-mail Capture - Potential Audit for Hatchs RPV Head Studs LAR
Project stage: Approval
ML22320A0722022-11-17017 November 2022
Regulatory Audit in Support of Review of the Application to Relax Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Studs
Project stage: Approval
ML22355A2082022-12-21021 December 2022
NRR E-mail Capture - RAI - Hatch, Units 1 and 2, Reactor Pressure Vessel RPV Head Studs LAR
Project stage: RAI
NL-23-0003, Response to Request for Additional Information Regarding License Amendment Request to Relax the Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Studs in Technical Specification Table 12023-01-20020 January 2023
Response to Request for Additional Information Regarding License Amendment Request to Relax the Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Studs in Technical Specification Table 1
Project stage: Response to RAI
ML23033A0282023-01-30030 January 2023
NRR E-mail Capture - Revised Estimates for Hatch RPV Studs LAR
Project stage: Approval
ML23034A2462023-02-21021 February 2023
Audit Summary for License Amendment Request to Relax Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Studs
Project stage: Other
PMNS20230217, Notice of Public Meeting with Southern Nuclear Operating Company, Inc. (SNC) to Discuss Submitted License Amendment Request (LAR) for the Edwin I. Hatch Nuclear Plant, Units 1 and 2 (Hatch)2023-03-0303 March 2023
Notice of Public Meeting with Southern Nuclear Operating Company, Inc. (SNC) to Discuss Submitted License Amendment Request (LAR) for the Edwin I. Hatch Nuclear Plant, Units 1 and 2 (Hatch)
Project stage: Meeting
ML23088A2282023-03-0303 March 2023, 28 March 2023, 3 April 2023
MTS - Meeting Summary - Public Meeting on March 28, 2023- Hatch RPV Head Closure Bolts LAR LAR
Project stage: Request
ML23065A0922023-03-0505 March 2023
NRR E-mail Capture - Revised Estimate Hours and Completion Date - Hatch RPV Head Closure Bolts LAR (L-2022-LLA-0120)
Project stage: Approval
ML23088A2362023-03-28028 March 2023
SNC Presentation - Public Meeting - 03-28-2023 - Page from ML22231B055
Project stage: Meeting
ML23088A3882023-04-0303 April 2023
Summary of March 28, 2023, Observation Public Meeting Held with SNC, Regarding a License Amendment Request Regarding the Reactor Pressure Vessel Head Closure Bolts for Edwin I. Hatch Nuclear Plan, Units 1 and 2
Project stage: Meeting
PMNS20230486, Notice of Public Meeting with Southern Nuclear Operating Company, Inc. (SNC) to Discuss Submitted License Amendment Request (LAR) for the Edwin I. Hatch Nuclear Plant, Units 1 and 2 (Hatch)2023-04-20020 April 2023
Notice of Public Meeting with Southern Nuclear Operating Company, Inc. (SNC) to Discuss Submitted License Amendment Request (LAR) for the Edwin I. Hatch Nuclear Plant, Units 1 and 2 (Hatch)
Project stage: Meeting
ML23136B2952023-04-20020 April 2023, 19 May 2023
Summary of May 02, 2023, Observation Public Meeting Held with Southern Nuclear Operating Company, Inc., Regarding a LAR for the Reactor Pressure Vessel Head Closure Bolts for Edwin I. Hatch Nuclear Plant, Units 1 and 2
Project stage: Request
ML23136B2942023-05-19019 May 2023
Summary of May 02, 2023, Observation Public Meeting Held with Southern Nuclear Operating Company, Inc., Regarding a LAR for the Reactor Pressure Vessel Head Closure Bolts for Edwin I. Hatch Nuclear Plant, Units 1 and 2
Project stage: Meeting
ML23248A4902023-07-10010 July 2023
NCP-2023-004: Non-Concurrence on Round 2 Request for Information on Hatch Reactor Pressure Bolts License Amendment Request
Project stage: RAI
ML23249A2082023-09-0606 September 2023
NRR E-mail Capture - Change in Estimated Review Schedule and Level of Effort for Hatch Revise TS Table 1.1-1 (Modes) LAR (L-2022-LLA-0120)
Project stage: Approval
ML23264A0142023-09-14014 September 2023
NRR E-mail Capture - (External_Sender) Draft Round-2 RAI - Hatch, Units 1 and 2, Revise TS 1.1-1 Modes LAR
Project stage: Draft Other
ML23250A0472023-09-20020 September 2023
– Request for Additional Information Regarding License Amendment Request to Relax Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Bolts in Technical Specifications Table 1.1-1, Modes
Project stage: RAI
NL-23-0752, Response to Request for Additional Information Regarding License Amendment Request to Relax the Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Studs in Technical Specification Table 1.1-1, Modes2023-10-20020 October 2023
Response to Request for Additional Information Regarding License Amendment Request to Relax the Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Studs in Technical Specification Table 1.1-1, Modes
Project stage: Response to RAI
PMNS20231395, Notice of Public Meeting with Southern Nuclear Operating Company, Inc. (SNC) to Discuss Submitted License Amendment Request (LAR) for the Edwin I. Hatch Nuclear Plant, Units 1 and 2 (Hatch)2023-12-21021 December 2023
Notice of Public Meeting with Southern Nuclear Operating Company, Inc. (SNC) to Discuss Submitted License Amendment Request (LAR) for the Edwin I. Hatch Nuclear Plant, Units 1 and 2 (Hatch)
Project stage: Meeting
ML23361A1092024-01-0808 January 2024
SNC Slides for Public Meeting on 1-8-24 to Discuss Hatch LAR - Revise TS Table 1.1-1 (Modes) to Relax Required No. of Fully Tensioned RPV Head Closure Studs
Project stage: Meeting
ML24012A1592024-01-30030 January 2024
Summary of January 8, 2024, Meeting Held with Southern Nuclear Operating Company, Inc., to Discuss a RAI License Amendment Request to Relax the Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Head Bolts
Project stage: RAI
NL-24-0014, Revised Response to Request for Additional Information Regarding License Amendment Request to Relax the Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Studs in Technical.2024-01-30030 January 2024
Revised Response to Request for Additional Information Regarding License Amendment Request to Relax the Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Studs in Technical.
Project stage: Response to RAI
ML24067A0702024-03-0707 March 2024
NRR E-mail Capture - Change in Estimated Review Completion for Hatch Revise TS Table 1.1-1 (Modes) LAR (L-2022-LLA-0120)
Project stage: Approval
ML23032A3322024-04-24024 April 2024
Issuance of Amendments Nos. 322 and 267, Regarding LAR to Relax Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Studs in TS Table 1.1-1, Modes
Project stage: Approval
2023-03-03
[Table View] |
Similar Documents at Hatch |
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Text
From:
Dawnmathews Kalathiveettil Sent:
Tuesday, November 1, 2022 3:28 PM To:
Quarles, Adam Graham Cc:
Chamberlain, Amy Christine; Michael Markley; John Lamb
Subject:
Potential Audit for Hatch's 'RPV Head Studs' LAR Importance:
High Good afternoon Adam, I just wanted to give you a heads-up that the NRC staff has identified the need for a potential regulatory audit pertaining to Hatch's RPV Head Studs LAR. NRC staff would like to review the FEA runs for Load Cases A1 and A2 provided in Dominion Engineerings (DEI) calculations.
A list of potential items that NRC staff plans to review can be seen below. This list is not final and is only provided for planning purposes.
Boundary conditions applied to the models for both Load Cases Stress and displacement results for both cases Simulation of the load transfer between head and vessel flanges Other aspects that will help the NRC staff understand the reason for the decrease in stud stress. For example, Section 5.2.3 in each of the two DEI calculations states that Load Case A2 represents the operating conditions with the vessel at design pressure and with intact studs. Operating conditions implies that Load Case A2 is at operating temperature and therefore includes some thermal stress. The NRC staff would like to review Load Case A2 minus the thermal stress to understand the thermal contribution.
Section 5.2.3 in each of the two DEI calculations in the enclosures describes Cases C1 and C2, which are for studs failing in service. Thus, the NRC staff will review the following aspects of the FEA run for Case C1 (and/or C2):
The starting load state when all studs are preloaded with the specified initial strain The corresponding end load state when one (or two) studs are assumed to fail in service Staff hopes to have an in-person Audit at the DEI office location in Reston, Virginia (please inform if location is different). We expect the in-person Audit meetings to take about 2-3 days.
Depending on the information available/reviewed at DEIs office location, the Audit timeline could be extended to accommodate any follow-up questions/reviews that NRC staff may have.
Please provide earliest potential dates when such an Audit can be supported by both SNC and DEI. I am currently in the process of drafting the Audit Plan and Audit Agenda and will provide these as they become available.
Best Regards, Dawnmathews T. Kalathiveettil Project Manager Plant Licensing Branch (LPL 2-1)
DORL - O8 C02 Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Office Phone: 301-415-5905 Email: Dawnmathews.Kalathiveettil@nrc.gov
Hearing Identifier:
NRR_DRMA Email Number:
1821 Mail Envelope Properties (BY5PR09MB56669A7468CCB7B5EAD04BBD97369)
Subject:
Potential Audit for Hatch's 'RPV Head Studs' LAR Sent Date:
11/1/2022 3:28:00 PM Received Date:
11/1/2022 3:27:00 PM From:
Dawnmathews Kalathiveettil Created By:
Dawnmathews.Kalathiveettil@nrc.gov Recipients:
"Chamberlain, Amy Christine" <ACCHAMBE@southernco.com>
Tracking Status: None "Michael Markley" <Michael.Markley@nrc.gov>
Tracking Status: None "John Lamb" <John.Lamb@nrc.gov>
Tracking Status: None "Quarles, Adam Graham" <AGQUARLE@southernco.com>
Tracking Status: None Post Office:
BY5PR09MB5666.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 2490 11/1/2022 3:27:00 PM Options Priority:
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