Letter Sequence RAI |
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MONTHYEARML21110A6842021-04-20020 April 2021 NRR E-mail Capture - RAI - Hatch Unit 2 - One-Time Emergency RHR LAR (L-2020-LRO-0068) Project stage: RAI ML21111A3032021-04-21021 April 2021 NRR E-mail Capture - RAI - Hatch Unit 2 - One-Time Emergency RHR LAR (L-2020-LRO-0068) Project stage: RAI 2021-04-20
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Similar Documents at Hatch |
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Category:E-Mail
MONTHYEARML24009A1112024-01-0909 January 2024 NRR E-mail Capture - Acceptance Review - Hatch 1&2 LAR - Revise TS 3.7.1 & 3.7.2 to Adopt Risk-Informed Completion Times for RHRSW and Psw Systems (L-2023-LLA-0169) ML23354A2032023-12-18018 December 2023 Document Request for Hatch Nuclear Plant - Radiation Protection Inspection - Inspection Report 2024-01 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 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) ML23223A0142023-08-10010 August 2023 NRR E-mail Capture - Acceptance Review - SNC Fleet Exemption to 10 CFR 73.2, Physical Barriers ML23198A1552023-07-17017 July 2023 NRR E-mail Capture - for Your Action - Request for Additional Information (RAI) - Hatch, Farley, and Vogtle, Units 1 and 2 Quality Assurance Topical Report (QATR) Submittal Dated June 15, 2023 ML23135A0922023-05-11011 May 2023 NRR E-mail Capture - Acceptance Review - SNC Fleet Request to Use Specific Provision of a Later Edition of the ASME BPV Code, Section XI (L-2023-LLR-0016) ML23073A0252023-03-13013 March 2023 NRR E-mail Capture - Fyi - Closeout the Evacuation Time Estimate (ETE) Reviews for SNC Fleet 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) ML23033A0952023-02-0202 February 2023 NRR E-mail Capture - (External_Sender) Re for Your Comments - State of Georgia - Hatch Units 1 and 2 - Relax Required Number of Fully Tensioned Reactor Pressure Vessel Head Closure Studs ML23033A0282023-01-30030 January 2023 NRR E-mail Capture - Revised Estimates for Hatch RPV Studs LAR ML23026A0132023-01-19019 January 2023 NRR E-mail Capture - Revised Estimates for Hatch RPV Studs LAR ML23018A1872023-01-17017 January 2023 2023 HNP CGD Inspection Information Request ML23006A0662023-01-0505 January 2023 NRR E-mail Capture - (External_Sender) for Your Comments - 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[Table view] Category:Request for Additional Information (RAI)
MONTHYEARML23341A2042024-01-12012 January 2024 Request for Additional Information Exemption Requests for Physical Barriers (EPID L-2023-LLE-0018 & L-2023-LLE-0021) ML23354A2032023-12-18018 December 2023 Document Request for Hatch Nuclear Plant - Radiation Protection Inspection - Inspection Report 2024-01 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 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 ML23198A1552023-07-17017 July 2023 NRR E-mail Capture - for Your Action - Request for Additional Information (RAI) - Hatch, Farley, and Vogtle, Units 1 and 2 Quality Assurance Topical Report (QATR) Submittal Dated June 15, 2023 ML23018A1872023-01-17017 January 2023 2023 HNP CGD Inspection Information Request ML22355A2082022-12-21021 December 2022 NRR E-mail Capture - RAI - Hatch, Units 1 and 2, Reactor Pressure Vessel 'Rpv Head Studs' LAR ML23026A2372022-11-16016 November 2022 2023001 Hatch RP RFI Final ML22208A1332022-07-26026 July 2022 NRR E-mail Capture - RAI - Hatch, Units 1 and 2, TSTF-208 LAR ML22157A3542022-06-0606 June 2022 NRR E-mail Capture - RAI - Hatch, Units 1 and 2, TSTF-505 LAR ML22140A1192022-05-20020 May 2022 NRR E-mail Capture - RAIs - Hatch, Units 1 and 2, TSTF-505 LAR ML22073A0842022-03-21021 March 2022 an NRC Fire Protection Team Inspection (NRC Inspection Report Nos. 05000321/2022011 and 05000366/2022011) and Request for Information ML22025A2142022-01-21021 January 2022 Plant Hatch 2022001 RP Baseline Inspection Information Request ML21265A3402021-09-22022 September 2021 NRR E-mail Capture - Request for Additional Information - Hatch, Unit 1, Emergency TS 3.7.2 LAR ML21111A3032021-04-21021 April 2021 NRR E-mail Capture - RAI - Hatch Unit 2 - One-Time Emergency RHR LAR (L-2020-LRO-0068) ML21110A6842021-04-20020 April 2021 NRR E-mail Capture - RAI - Hatch Unit 2 - One-Time Emergency RHR LAR (L-2020-LRO-0068) ML21013A4112021-01-13013 January 2021 Notification of Edwin I. Hatch Nuclear Plant Design Bases Assurance Inspection U.S. Nuclear Regulatory Commission Inspection Report 05000321/2021010 and 05000366/2021010 ML20293A0752020-10-14014 October 2020 NRR E-mail Capture - RAIs for SNC Fleet EP LAR (L-2020-LLA-0150 and L-2020-LLA-0151) ML20253A2732020-09-0909 September 2020 Requalification Program Inspection Hatch Nuclear Station ML20149K6252020-05-27027 May 2020 NRR E-mail Capture - RAIs for SNC Fleet Fire Protection Exemption Requests NL-19-1532, Units 1 and 2 - Response to Requests for Additional Information Regarding Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures. Systems and Components for Nuclear Power Reactors2019-12-18018 December 2019 Units 1 and 2 - Response to Requests for Additional Information Regarding Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures. Systems and Components for Nuclear Power Reactors ML19336A0142019-12-0101 December 2019 NRR E-mail Capture - RAI: Hatch Emergency TS 3.7.1 Residual Heat Removal Service Water (RHRSW) System LAR ML19280A0082019-10-0404 October 2019 NRR E-mail Capture - Request for Additional Information (RAI) - Hatch TSTF-51 LAR (L-2019-LLA-0091) ML19224C0552019-08-12012 August 2019 NRR E-mail Capture - RAI - Edwin I. Hatch Nuclear Plant, LAR Regarding Degraded Voltage (L-2019-LLA-0108) ML19220A0362019-08-0808 August 2019 NRR E-mail Capture - RAI - Edwin I. Hatch Nuclear Plant, LAR Regarding Adoption of NFPA 805, Request for Additional Information, EPID L-2018-LLA-0107 ML19164A2582019-06-13013 June 2019 Notification of Inspection and Request for Information for NRC Problem Identification and Resolution Inspection ML19107A4962019-04-17017 April 2019 NRR E-mail Capture - Request for Additional Information - Hatch 1 & 2 Application to Adopt Title 10 of Code of Federal Regulations 50.69 RISK-INFORMED Categorization and Treatment of Structures, Systems and Components for Power Reactors ML19088A0092019-03-29029 March 2019 NRR E-mail Capture - Hatch 1 and 2 - LAR to Adopt NFPA 805 Fire Protection Standard, EPID L-2018-LLA-0107, Request for Additional Information ML19029B3402019-01-23023 January 2019 Southern Nuclear Operating Company, Edwin I. Hatch Nuclear Plant, Unit Nos. 1 and 2 Draft Request for Additional Information for the License Amendment Requests to Adopt the Risk-Informed Provisions of Title 10 of the Code of Federal Regulat ML19016A3422019-01-10010 January 2019 U2 ISI 2019001 RFI - Bcc ML18355A4772019-01-0404 January 2019 Request for Additional Information Revise TS 5.2.2.g and Update Emergency Plan Minimum On-Shift Staff Tables ML18337A4032018-12-0606 December 2018 Request for Additional Information Revise Technical Specification 5.2.2.G and Updating Emergency Plan Minimum On-Shift Staff Tables ML18085A0132018-03-0808 March 2018 Draft Request for Additional Information on Alternative RR-V-11, Proposed Extension to Main Steam Safety Relief Valve Testing Requirements ML18058A0812018-02-27027 February 2018 Enclosurequest for Additional Information(Rai for Review of Southern Nuclear Operating Company'S Decommissioning Funding Plan Updates for Joseph M. Farley,Unit 1 and 2;Edwin I. Hatch,Units 1 and 2; and Vogtle Electric Generating Plant, Unit ML17306A0872017-11-0808 November 2017 Request for Additional Information Regarding the Decommissioning Funding Status Reports (EPID L-LRO-2017-0008) ML17284A3542017-11-0707 November 2017 Request for Additional Information Regarding Generic Letter 2016-01, Monitoring of Neutron Absorbing Materials in Spent Fuel Pools ML17270A1402017-09-27027 September 2017 PIR Notification Letter 2017 ML17290A3172017-09-19019 September 2017 NRR E-mail Capture - Hatch 1 and 2 - Draft Request for Additional Information Request for Alternative No. HNP-ISI-ALT-05-05 ML17111A5792017-04-26026 April 2017 Request for Additional Information, Fourth 10-Year ISI Interval Relief Requests ML17110A2112017-04-24024 April 2017 Request for Additional Information ML16330A1282016-12-0505 December 2016 Request for Additional Information ML16307A1842016-11-0202 November 2016 Request for Additional Information (Non-Proprietary) ML16271A1692016-10-17017 October 2016 Request for Additional Information ML16222A2952016-08-29029 August 2016 Request for Additional Information ML16205A0012016-07-22022 July 2016 Requalification Program Inspection - Plant Hatch ML16195A4002016-07-13013 July 2016 Request for Additional Information License Amendment Request to Revise Technical Specifications Regarding TSTF-500 ML16194A4282016-07-12012 July 2016 E-mail Draft Request for Additional Information for Technical Clarification ML16187A1222016-07-0101 July 2016 Notification of Inspection and Request for Information ML16111B3132016-04-20020 April 2016 Notification of Inspection and Request for Information ML16098A1442016-04-15015 April 2016 Request for Additional Information 2024-01-12
[Table view] |
Text
From: Lamb, John Sent: Tuesday, April 20, 2021 3:39 PM To: Enfinger, Timothy Lee
Subject:
RAI - Hatch Unit 2 - One-Time Emergency RHR LAR (L-2020-LRO-0068)
Importance: High
- Tim, By letter dated April 19, 2021 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML21010A388), Southern Nuclear Operating Company (SNC, the licensee) submitted a one-time emergency residual heat removal (RHR) license amendment request (LAR) for Edwin I. Hatch Nuclear Plant, Unit 2. The proposed amendment would make a one-time revision to Condition A of Technical Specification 3.5.1, ECCS [Emergency Core Cooling System] - Operating, to extend the Completion Time (CT) from 7 days to 15 days.
To complete its review of the inspection, the U.S. Nuclear Regulatory Commission (NRC) staff requests the below additional information.
On April 20, 2021, the NRC staff provided draft request for additional information (RAI) questions to SNC to make sure that the RAIs are understandable, the regulatory basis is clear, to ensure there is no proprietary information, and to determine if the information was previously docketed. The NRC staff is requesting that SNC would provide the RAI response commensurate with the emergency situation.
If you have any questions, you can contact me at 301-415-3100.
Sincerely, John REQUEST FOR ADDITIONAL INFORMATION By letter dated April 19, 2021 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML21010A388), Southern Nuclear Operating Company (SNC, the licensee) submitted a one-time emergency residual heat removal (RHR) license amendment request (LAR) for Edwin I. Hatch Nuclear Plant, Unit 2. The proposed amendment would make a one-time revision to Condition A of Technical Specification 3.5.1, ECCS [Emergency Core Cooling System] - Operating, to extend the Completion Time (CT) from 7 days to 15 days.
To complete its review of the inspection, the U.S. Nuclear Regulatory Commission (NRC) staff requests the following additional information:
- Provide a detailed analyses of the performance of the 2A, 2B, and 2C RHR pumps, and
- Review of industry operating experience pertaining to Ingersoll-Rand pumps.
Regulatory Requirement Regulatory Guide 1.177, Revision 1 Discussion
RG 1.177 Element 2: Perform Engineering Analysis reads in part:
The licensee should examine the proposed TS change to verify that it meets existing applicable rules and regulations. In addition, the licensee should determine how the change impacts defense-in-depth aspects of the plants design and operation and should determine the adequacy of safety margins following the proposed change. The licensee should consider how plant and industry operating experience relates to the proposed change, and whether potential compensatory measures could be taken to offset any negative impact from the proposed change.
LAR Emergency Circumstances Section 2.1 Why this Situation Could Not be Avoided provides considerable detail to explain that were no precursors (e.g., pump flow, discharge pressure, differential pressure, vibration analysis, oil analysis, thermography etc.) that could have predicted the failure of the 2D RHR pump.
In contrast, the LAR does not provide a similar performance review and analyses (2A, 2B, and 2C RHR pumps) of the RHR redundant trains pumps or residual same train RHR pump.
In addition, Enclosure to NL-21-0411 of the LAR does not contain a review of industry or pump vendor (Ingersoll-Rand) operating experience that would support a preface that common mode failure is highly unlikely.
To complete its review of the inspection, the U.S. Nuclear Regulatory Commission (NRC) staff requests the following additional information:
- 1. A new foreign object (FO) indication in tube Row 1, Column 2 (R1C2) was identified during RFO 1R22 (spring 2020). The spring 2020 SG tube inspection report (SGTIR) stated that lookback showed a precursor signal for the FO indication in tube R1C2.
- a. The report does not indicate in which outage, or in how many outages, the precursor signal was present. Please provide this information.
- b. Tube R1C2 was not plugged during 1R22. The spring 2020 SGTIR stated that no secondary side activities were performed during 1R22. Please discuss SNCs decision not to perform FO search and retrieval to confirm the presence of the FO and to attempt to remove it.
- 2. Table 8 in the RFO spring 2020 SGTIR includes the two broached tube support plate (TSP) wear indications identified during 1R22. Both broached TSP wear indications were first identified during RFO 1R21 (fall 2018). The broached TSP wear indication in tube R44C21 was reported to be in SG-4 in the RFO spring 2020 SGTIR, but it was reported to be in SG-1 in the RFO fall 2018 SGTIR (ADAMS Accession No. ML19080A329).
Please confirm the SG in which the broached TSP wear indication in tube R44C21 is located.
Hearing Identifier: NRR_DRMA Email Number: 1137 Mail Envelope Properties (MN2PR09MB508427573F8D2D34C46A1570FA489)
Subject:
RAI - Hatch Unit 2 - One-Time Emergency RHR LAR (L-2020-LRO-0068)
Sent Date: 4/20/2021 3:38:53 PM Received Date: 4/20/2021 3:38:53 PM From: Lamb, John Created By: John.Lamb@nrc.gov Recipients:
"Enfinger, Timothy Lee" <TLENFING@SOUTHERNCO.COM>
Tracking Status: None Post Office: MN2PR09MB5084.namprd09.prod.outlook.com Files Size Date & Time MESSAGE 4728 4/20/2021 3:38:53 PM Options Priority: High Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date: