Letter Sequence RAI |
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Initiation
- Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request, Request
- Acceptance...
- Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement, Supplement
Results
Other: ML110620203, ML11140A163, ML11224A265, ML11230A003, ML11318A121, ML11318A122, ML11318A123, ML11318A124, ML11318A125, ML11318A126, ML11318A127, ML11318A128, ML11318A129, ML11318A130, ML11318A131, ML11318A132, ML11318A133, ML11318A135, ML11318A136, ML11318A138, ML11318A139, ML11318A140, ML11318A141, ML11318A142, ML11318A143, ML11318A144, ML11318A145, ML11318A146, ML11318A147, ML11318A148, ML11318A149, ML11318A150, ML11318A151, ML11318A152, ML11318A153, ML11318A154, ML11318A155, ML11318A156, ML11318A157, ML11318A158, ML11318A159, ML11318A160, ML11318A161, ML11318A162, ML11318A163, ML11318A164, ML11318A165, ML11318A166, ML11318A167, ML11318A168... further results
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MONTHYEARML1106202032011-03-17017 March 2011 License Renewal Application Online Reference Portal Project stage: Other ML1108907642011-04-14014 April 2011 Request for Additional Information for the Review of the South Texas Project, License Renewal Application-Electrical Branch Scoping Project stage: RAI ML1108205792011-04-14014 April 2011 Request for Additional Information for the Review of the South Texas Project, License Renewal Application -Section 2.4 Structural (TAC Nos. ME4936, ME4937) Project stage: RAI ML1108309782011-04-14014 April 2011 Request for Additional Information for the Review of the South Texas Project, License Renewal Application, Fire Protection and Component Integrity (TAC Nos. ME4536 ME4637 Project stage: RAI NOC-AE-11002670, Response to Request for Additional Information for License Renewal Application2011-05-0505 May 2011 Response to Request for Additional Information for License Renewal Application Project stage: Response to RAI NOC-AE-11002672, Response to Request for Additional Information for Licence Renewal Application2011-05-12012 May 2011 Response to Request for Additional Information for Licence Renewal Application Project stage: Response to RAI ML11137A0922011-05-24024 May 2011 Request for Additional Information for the Review of the South Texas Project, Units 1 and 2, License Renewal Application Future Consideration of Operating Experience Project stage: RAI ML11140A1632011-06-0606 June 2011 Plan for the Aging Management Program Regulatory Audit Regarding the South Texas Project, Units 1 and 2 License Renewal Application Review (TAC Nos. ME4936 and ME4937) Project stage: Other NOC-AE-11002681, Amendment 2 to the License Renewal Application2011-06-16016 June 2011 Amendment 2 to the License Renewal Application Project stage: Other NOC-AE-11002683, Response to Request for Additional Information for License Renewal Application (TAC Nos. ME4936 and ME4937)2011-06-23023 June 2011 Response to Request for Additional Information for License Renewal Application (TAC Nos. ME4936 and ME4937) Project stage: Response to RAI ML11154A0132011-07-0606 July 2011 Summary of Telephone Conference Call Held on May 23, 2011, Between the NRC and STPNOC, Concerning Requests for Additional Information Pertaining to the South Texas Project, LRA-Future Consideration of Operating Experience Project stage: RAI ML11166A2392011-07-12012 July 2011 Letter Request for Additional Information for South Texas Project Electric Generating Station, Units 1 and 2 License Renewal Application - Scoping and Screening Balance of Plant (TAC Nos. ME4936 and ME4937) Project stage: RAI ML11201A0552011-07-28028 July 2011 Requests for Additional Information for the Review of the South Texas Project, License Renewal Application - Scoping and Screening Audit (TAC Nos. ME4936 and ME4937) Project stage: RAI NOC-AE-11002702, Response to Request for Additional Information for the Review of the South Texas Project License Renewal Application2011-08-0909 August 2011 Response to Request for Additional Information for the Review of the South Texas Project License Renewal Application Project stage: Response to RAI ML11214A0882011-08-15015 August 2011 Request for Additional Information for the Review of the South Texas Project, Units 1 and 2 License Renewal Application - Aging Management Programs Audit, Plant Systems (TAC ME4936 and ME4937) Project stage: RAI ML11214A0052011-08-15015 August 2011 Requests for Additional Information for the Review of the South Texas Project, Units 1 and 2 License Renewal Application - Aging Management Programs Audit, Structures/Electrical (TAC ME4936 and ME4937) Project stage: RAI ML11214A0272011-08-15015 August 2011 Requests for Additional Information for the Review of the South Texas Project, Units 1 and 2 License Renewal Application - Aging Management Programs Audit, Reactor Systems (TAC Nos. ME4936 and ME4937) Project stage: RAI NOC-AE-11002716, Response to Request for Additional Information for the South Texas Project License Renewal Application (TAC ME4936 and ME4937)2011-08-18018 August 2011 Response to Request for Additional Information for the South Texas Project License Renewal Application (TAC ME4936 and ME4937) Project stage: Response to RAI ML1123000162011-08-18018 August 2011 License Renewal - Errata in AMP RAI Package Project stage: RAI NOC-AE-11002714, Response to Request for Additional Information for the South Texas Project License Renewal Application (TAC ME4936 and ME4937)2011-08-23023 August 2011 Response to Request for Additional Information for the South Texas Project License Renewal Application (TAC ME4936 and ME4937) Project stage: Response to RAI ML11230A0032011-09-0606 September 2011 Scoping and Screening Audit Report Regarding the South Texas Project, Units 1 and 2 (TAC Nos. ME4936 and ME4937) Project stage: Other NOC-AE-11002730, Response to Request for Additional Information for License Renewal Application (TAC Nos. ME4936 and ME4937)2011-09-15015 September 2011 Response to Request for Additional Information for License Renewal Application (TAC Nos. ME4936 and ME4937) Project stage: Response to RAI NOC-AE-11002731, Response to Requests for Additional Information for License Renewal Application (TAC Nos. ME4936 and ME4937)2011-09-15015 September 2011 Response to Requests for Additional Information for License Renewal Application (TAC Nos. ME4936 and ME4937) Project stage: Response to RAI ML1124402012011-09-21021 September 2011 Request for Additional Information for the Review of the South Texas Project, Units 1 and 2 License Renewal Application - Aging Management Review, Set 2 (TAC Nos. ME4936, ME4937) Project stage: RAI ML11250A0432011-09-22022 September 2011 Requests for Additional Information for the Review of the South Texas Project, Units 1 and 2 License Renewal Application - Aging Management Review, Set 1 (TAC Nos. ME4936 and ME4937) Project stage: RAI ML11224A2652011-09-22022 September 2011 Aging Management Programs Audit Report Regarding the South Texas Project, Units 1 and 2, Station License Renewal Application (TAC Nos. ME4936 and ME4937) Project stage: Other ML11258A1612011-09-22022 September 2011 Request for Additional Information for the Review of the South Texas Project, Units 1 and 2 License Renewal Application - Aging Management Review, Set 3 (TAC Nos. ME4936 and ME4937) Project stage: RAI ML11272A1652011-10-0404 October 2011 Summary of Telephone Conference Call Held on September 28, 2011, Between the NRC and STP Nuclear Operating Company, Concerning Request for Additional Information Pertaining to the South Texas Project, LRA (TAC Nos. ME4936 and ME4937) Project stage: RAI NOC-AE-11002732, Response to Requests for Additional Information for the License Renewal Application2011-10-10010 October 2011 Response to Requests for Additional Information for the License Renewal Application Project stage: Response to RAI ML11273A0172011-10-11011 October 2011 Requests for Additional Information for the Review of the South Texas Project, Units 1 and 2, License Renewal Application - Aging Management Review, Set 5 (TAC Nos. ME4936 and ME4937) Project stage: RAI ML11273A0082011-10-11011 October 2011 Requests for Additional Information for the Review of the South Texas Project, Units 1 and 2, License Renewal Application - Aging Management Review, Set 4 (TAC Nos. ME4936 and ME4937) Project stage: RAI NOC-AE-11002737, Supplement to License Renewal Application (TAC Nos. ME4936 and ME4937)2011-10-18018 October 2011 Supplement to License Renewal Application (TAC Nos. ME4936 and ME4937) Project stage: Supplement ML11277A0472011-10-18018 October 2011 Requests for Additional Information for the Review of the South Texas Project, Units 1 and 2, License Renewal Application - Aging Management Program, Set 6 Project stage: RAI ML11305A0762011-10-25025 October 2011 Response to Requests for Additional Information for License Renewal Application (TAC ME4936 and ME4937) Project stage: Response to RAI NOC-AE-11002756, Contact Information Change, License Renewal Application (TAC ME4936 and ME4937)2011-10-26026 October 2011 Contact Information Change, License Renewal Application (TAC ME4936 and ME4937) Project stage: Other ML11318A1792011-11-0303 November 2011 Drawing No. LR-STP-WL-7R309F90021#2, Rev. 1, Piping and Instrumentation Diagram Liquid Waste Processing System Project stage: Other ML11318A1802011-11-0303 November 2011 Drawing No. LR-STP-WS-6R329F05048#1, Rev. 1, Piping and Instrumentation Diagram Solid Waste Processing System Project stage: Other ML11318A1762011-11-0303 November 2011 Drawing No. LR-STP-WL-7R309F05024#2, Rev. 1, Piping and Instrumentation Diagram Liquid Waste Processing System Project stage: Other ML11318A1652011-11-0303 November 2011 Drawing No. LR-STP-PS9Z329Z00047#1, Rev. 1, Piping and Instrumentation Diagram Primary Sampling System. Project stage: Other ML11318A1642011-11-0303 November 2011 Drawing No. LR-STP-PS-5Z329Z00045#2, Rev. 1, Piping & Instrumentation Diagram Primary Sampling System. Project stage: Other ML11318A1782011-11-0303 November 2011 Drawing No. LR-STP-WL-7R309F90021#1, Rev. 1, Piping and Instrumentation Diagram Liquid Waste Processing System Project stage: Other ML11318A1682011-11-0303 November 2011 Drawing No. LR-STP-RC-5R149F05004#2, Rev. 1, Piping and Instrumentation Diagram Acs Pressurizer Relief Tank. Project stage: Other ML11318A1722011-11-0303 November 2011 Drawing No. LR-STP-WL-5R309F05022#2, Rev. 1, Piping and Instrumentation Diagram Liquid Waste Processing System. Project stage: Other ML11318A1702011-11-0303 November 2011 Drawing No. LR-STP-RM-5R279F05033#2, Rev. 1, Piping & Instrumentation Reactor Makeup Water System. Project stage: Other ML11318A1602011-11-0303 November 2011 Drawing No. LR-STP-IA-8Q119F05050#2, Rev. 1, Piping & Instrumentation Diagram Mechanical Aux. Building Instrument Air. Project stage: Other NOC-AE-11002749, Drawing No. LR-STP-SB-7S209F200032, Rev. 0, Piping and Instrumentation Diagram Steam Generator Blowdown System2011-11-0303 November 2011 Drawing No. LR-STP-SB-7S209F20003#2, Rev. 0, Piping and Instrumentation Diagram Steam Generator Blowdown System Project stage: Other ML11318A1742011-11-0303 November 2011 Drawing No. LR-STP-WL-5R309F05027#2, Rev. 1, Piping & Instrumentation Diagram Auxiliary Steam and Condensate Return System (Lwps) Project stage: Other ML11318A1462011-11-0303 November 2011 Drawing LR-STP-ED-5Q069F05030 #2, Rev. 17, Piping & Instrumentation Diagram Radioactive Vent & Drain System Sump Pumps. Project stage: Other ML11318A1552011-11-0303 November 2011 Drawing No. LR-STP-FP-7Q272F00046, Rev. 1, Piping and Instrumentation Diagram Fire Protection Loop. Project stage: Other ML11318A1482011-11-0303 November 2011 Drawing No. LR-STP-ED-5Q069F90011#2, Revision 1, Piping & Instrumentation Diagram Radioactive Vent and Drain System Fuel Handling Building Gravity Drains. Project stage: Other 2011-06-16
[Table View] |
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Category:Letter
MONTHYEARML24304B0512024-10-30030 October 2024 Cycle 26 Core Operating Limits Report IR 05000498/20244022024-10-23023 October 2024 Security Baseline Inspection Report 05000498/2024402 and 05000499/2024402 05000499/LER-2024-003, Containment Isolation Valve Inoperable Resulting in Condition Prohibited by Technical Specification and Prevention of Fulfillment of Safety Function2024-10-22022 October 2024 Containment Isolation Valve Inoperable Resulting in Condition Prohibited by Technical Specification and Prevention of Fulfillment of Safety Function ML24295A0772024-10-21021 October 2024 Licensed Operator Positive Fitness-for-Duty Test 05000499/LER-2024-002, Two Control Room Envelope HVAC Trains Inoperable Resulting in a Condition That Could Have Prevented Fulfillment of a Safety Function2024-10-17017 October 2024 Two Control Room Envelope HVAC Trains Inoperable Resulting in a Condition That Could Have Prevented Fulfillment of a Safety Function ML24290A1162024-10-16016 October 2024 Change to South Texas Project Electric Generating Station (STPEGS) Emergency Plan ML24255A0322024-09-30030 September 2024 The Associated Independent Spent Fuel Storage Installation - Notice of Consideration of Approval of Direct Transfer of Licenses and Opportunity to Request a Hearing (EPID L-2024-LLM-0002) - Letter ML24269A1762024-09-25025 September 2024 Tpdes Permit Renewal Application WQ0001 908000 05000498/LER-2024-004, Loss of Offsite Power Resulting in Unit 1 Automatic Reactor Trip and Actuation of Emergency Diesel Generators and Auxiliary Feedwater Pumps2024-09-19019 September 2024 Loss of Offsite Power Resulting in Unit 1 Automatic Reactor Trip and Actuation of Emergency Diesel Generators and Auxiliary Feedwater Pumps ML24271A3022024-09-18018 September 2024 STP-2024-09 Post-Exam Comments - Redacted ML24274A0902024-09-16016 September 2024 Written Response - EA-24-026 STP Operator - Redacted ML24250A1882024-09-11011 September 2024 Request for Information for an NRC Post-Approval Site Inspection for License Renewal 05000499/LER-2024-001-01, Supplement to Automatic Reactor Trip and Actuation of Two of Three Emergency Diesel Generators2024-08-29029 August 2024 Supplement to Automatic Reactor Trip and Actuation of Two of Three Emergency Diesel Generators IR 05000498/20240052024-08-22022 August 2024 Updated Inspection Plan for South Texas Project Electric Generating Station, Units 1 and 2 (Report 05000498/2024005 and 05000499/2024005) IR 05000498/20240022024-08-0909 August 2024 Integrated Inspection Report 05000498/2024002 and 05000499/2024002 IR 05000498/20240102024-08-0808 August 2024 Biennial Problem Identification and Resolution Inspection Report 05000498/2024010 and 05000499/2024010 ML24218A1462024-07-26026 July 2024 2. EPA Comments on South Texas Project Exemption Ea/Fonsi ML24207A1782024-07-25025 July 2024 Licensed Operator Positive Fitness-For-Duty Test 05000499/LER-2024-001, Automatic Reactor Trip and Actuation of Two of Three Emergency Diesel Generators2024-07-0202 July 2024 Automatic Reactor Trip and Actuation of Two of Three Emergency Diesel Generators 05000498/LER-2024-003, Condition Prohibited by Technical Specifications and Potential Loss of Safety Function Due to Inoperable Low Head Safety Injection Pump2024-07-0101 July 2024 Condition Prohibited by Technical Specifications and Potential Loss of Safety Function Due to Inoperable Low Head Safety Injection Pump 05000498/LER-2024-002-01, Two Essential Chilled Water Trains Inoperable Resulting in a Condition That Could Have Prevented Fulfillment of a Safety Function2024-06-27027 June 2024 Two Essential Chilled Water Trains Inoperable Resulting in a Condition That Could Have Prevented Fulfillment of a Safety Function 05000498/LER-2023-003-01, Two Essential Chilled Water Trains Inoperable Resulting in a Condition That Could Have Prevented Fulfillment of a Safety Function2024-06-19019 June 2024 Two Essential Chilled Water Trains Inoperable Resulting in a Condition That Could Have Prevented Fulfillment of a Safety Function ML24141A0482024-05-17017 May 2024 EN 56958_1 Ametek Solidstate Controls, Inc ML24137A0882024-05-15015 May 2024 Operator Licensinq Examination Schedule Revision 3 ML24136A2872024-05-15015 May 2024 Submittal of 2024 Nrc/Fema Evaluated Exercise Scenario Manual ML24136A2842024-05-15015 May 2024 Independent Spent Fuel Storage Installation Supplement to Request for Exemption from Various Part 72 Regulations Resulting from Fuel Basket Design Control Compliance ML24130A2712024-05-0909 May 2024 Re Two Essential Chilled Water Trains Inoperable Resulting in a Condition That Could Have Prevented Fulfillment of a Safety Function ML24128A1572024-05-0707 May 2024 Independent Spent Fuel Storage Installation Request for Exemption from Various Part 72 Regulations Resulting from Fuel Basket Design Control Compliance IR 05000498/20240012024-05-0606 May 2024 Integrated Inspection Report 05000498/2024001 & 05000499/2024001 ML24120A3762024-04-29029 April 2024 Annual Dose Report for 2023 ML24116A3032024-04-25025 April 2024 Operations Quality Assurance Plan Condition Adverse to Quality Definition Change Resulting in a Reduction in Commitment ML24116A2282024-04-25025 April 2024 Annual Environmental Operating Report 05000498/LER-2023-004-01, Condition Prohibited by Technical Specifications Due to Inoperable Train of Essential Chilled Water2024-04-25025 April 2024 Condition Prohibited by Technical Specifications Due to Inoperable Train of Essential Chilled Water ML24117A1602024-04-24024 April 2024 2023 Radioactive Effluent Release Report ML24102A2452024-04-23023 April 2024 Exemption from Select Requirements of 10 CFR Part 73 (EPID L-2023-LLE-0046 (Security Notifications, Reports, and Recordkeeping and Suspicious Activity Reporting)) ML24113A3122024-04-22022 April 2024 Cycle 24 Core Operating Limits Report ML24097A0072024-04-0606 April 2024 Relief Request Number RR-ENG-4-07 – Request for an Alternative to ASME Code Case N-729-6 for Reactor Vessel Head Penetration 75 05000498/LER-2024-001, Re Two Steam Generator Power Operated Relief Valves (Porvs) Inoperable Resulting in a Condition That Could Have Prevented Fulfillment of a Safety Function2024-04-0101 April 2024 Re Two Steam Generator Power Operated Relief Valves (Porvs) Inoperable Resulting in a Condition That Could Have Prevented Fulfillment of a Safety Function ML24088A3022024-03-28028 March 2024 Financial Assurance for Decommissioning - 2024 Update ML24081A3972024-03-21021 March 2024 Response to Request for Additional Information for Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation ML24080A2902024-03-19019 March 2024 Nuclear Liability Certificates of Insurance NOC-AE-240040, Nuclear Liability Certificates of Insurance2024-03-19019 March 2024 Nuclear Liability Certificates of Insurance ML24066A2002024-03-0606 March 2024 10 CFR 50.46 Thirty-Day Report of Significant ECCS Model Changes ML24079A1312024-03-0505 March 2024 Nuclear Insurance Protection ML24060A1742024-02-28028 February 2024 Submittal of Annual Fitness for Duty Performance Report for 2023 IR 05000498/20230062024-02-28028 February 2024 Annual Assessment Letter for South Texas Project Electric Generating Station, Units 1 and 2 (Report 05000498/2023006 and 05000499/2023006) IR 05000498/20240132024-02-27027 February 2024 Design Basis Assurance Inspection (Programs) Commercial Grade Dedication IR 05000498/2024013 and 05000499/2024013 ML24022A2252024-02-20020 February 2024 Issuance of Amendment Nos. 227 and 212 to Authorize the Revision of the Alternative Source Term Dose Calculation ML24050A0082024-02-19019 February 2024 Evidence of Financial Protection ML24045A0922024-02-16016 February 2024 Response to STP FOF Move Letter (2024) 2024-09-30
[Table view] Category:Request for Additional Information (RAI)
MONTHYEARML24207A1782024-07-25025 July 2024 Licensed Operator Positive Fitness-For-Duty Test ML24052A0112024-02-16016 February 2024 NRR E-mail Capture - South Texas Project - Draft Request for Additional Information - Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications (L-2023-LLE-0046) ML24024A1162024-01-24024 January 2024 STP Unit 2 Request for Information ML23334A0062023-11-29029 November 2023 NRR E-mail Capture - South Texas Project - Request for Additional Information - Proposed Alternative to ASME BPV Code Requirements ML23319A4442023-11-15015 November 2023 NRR E-mail Capture - South Texas Project - Draft Request for Additional Information - Proposed Alternative to ASME BPV Code Requirements ML23278A1532023-10-0505 October 2023 NRR E-mail Capture - South Texas Project – Request for Additional Information - Request for Indirect Transfer of Licenses and Conforming Amendments (L-2023-LLM-0004) ML23264A0972023-09-21021 September 2023 NRR E-mail Capture - South Texas Project - Request for Additional Information - License Amendment Request to Revise the Alternate Source Term Dose Calculation (L-2023-LLA-0047) ML23255A2862023-09-12012 September 2023 NRR E-mail Capture - South Texas Project – Draft Request for Additional Information – License Amendment Request to Revise the Alternate Source Term Dose Calculation (L-2023-LLA-0047) ML23145A1872023-05-24024 May 2023 July 2023 Emergency Preparedness Program Inspection - Request for Information ML22255A1542022-09-13013 September 2022 Operating Company Information Request for the Cyber Security Baseline Inspection 05000498/2022401 and 05000499/2022401 ML22206A0142022-07-20020 July 2022 NRR E-mail Capture - South Texas Project - Request for Additional Information - 10 CFR 20.2002 Alternate Disposal Request ML22194A0502022-07-0707 July 2022 NRR E-mail Capture - South Texas Project - Updated Draft Request for Additional Information - 10 CFR 20.2002 Alternate Disposal Request ML22194A0492022-06-0808 June 2022 NRR E-mail Capture - South Texas Project - Draft Request for Additional Information - 10 CFR 20.2002 Alternate Disposal Request ML22123A3272022-05-0303 May 2022 STP EP Exercise Inspection July 2022 RFI ML22084A0762022-04-0404 April 2022 Notification of NRC Design Bases Assurance Inspection (Team) (05000498/2022012 and 05000499/2022012) and Request for Information ML21286A5732021-10-18018 October 2021 Notification of NRC Design Bases Assurance Inspection (Programs) (05000498/2022011 and 05000499/2022011) and Request for Information ML21166A2392021-06-16016 June 2021 Notification of Inspection (NRC Inspection Report 05000498/2021003 and 05000499/2021003) and Request for Information ML21160A1522021-06-0909 June 2021 Request for Information NRC Inspection 2021-003 Public Radiation Safety ML21133A2372021-05-0505 May 2021 Request for Additional Information: STP EP Exercise Inspection - July 2021 ML21039A8902021-02-0808 February 2021 NRR E-mail Capture - South Texas Project - Request for Additional Information - 1RE22 Inspection Summary Report for Steam Generator Tubing ML21029A3312021-01-29029 January 2021 NRR E-mail Capture - South Texas Project - Draft Request for Additional Information - 1RE22 Inspection Summary Report for Steam Generator Tubing ML20280A5452020-08-17017 August 2020 STP 2020 PIR Request for Information ML20111A0052020-04-17017 April 2020 NRR E-mail Capture - South Texas Project - Request for Additional Information - Proposed Alternative to ASME OM Code 2012 Edition - Relief Request PRR-01 ML20070N0222020-03-10010 March 2020 NRC Selection for Onsite Review ML20057G4612020-02-26026 February 2020 05000498/499 Request for Information - Occupational Radiation Safety Inspection ML20045E2172020-02-13013 February 2020 Licensed Operator Positive Fitness-For-Duty Test ML20036F5862020-02-0404 February 2020 Request for Additional Information - Proposed Alternative to ASME Code Requirements for the Repair of Essential Cooling Water System Class 3 Buried Piping (EPID L-2019-LLR-0096)Redacted ML19165A1032019-06-14014 June 2019 NRR E-mail Capture - Draft RAI for STP TS 3.8.1.1 Sbdg SR Change ML19081A1512019-03-21021 March 2019 NRR E-mail Capture - Draft Round 2 RAI - Sbdg Voltage and Frequency LAR (L-2018-LLA-0078) ML18283B9522018-10-10010 October 2018 NRR E-mail Capture - Final RAI - South Texas Standby DG TS Change (L-2018-LLA-0078) ML18263A1432018-09-12012 September 2018 NRR E-mail Capture - Final RAI for South Texas Project RR-ENG-E-16 (L-2018-LLR-0097) ML18197A4172018-07-17017 July 2018 Notification of NRC Triennial Heat Sink Performance Inspection (05000498/2018003 and 05000499/2018003) and Request for Information ML18003B4222018-01-0303 January 2018 NRR E-mail Capture - Final Request for Additional Information Amendment Request to Modify the Emergency Response Organization for South Texas Project ML17229B4672017-08-16016 August 2017 Notification of NRC Inspection 05000499/2017008 and Request for Information ML17132A0712017-05-15015 May 2017 Information Request the Cyber Security Baseline Inspection, Notification to Perform Inspection 05000498/2017407; 05000499/2017407 ML17103A6272017-04-13013 April 2017 Notification of Evaluations of Changes, Tests, and Experiments Inspection (05000498/2017007 and 05000499/2017007) and Request for Information ML16351A1502016-12-16016 December 2016 Correction Letter Closeout of Request for Information Questions That Are No Longer Applicable Associated with the Resolution of Generic Safety Issue 191 (CAC Nos. MF2400 - MF2409) ML16302A4532016-12-12012 December 2016 Closeout of Request for Additional Information Questions That Are No Longer Applicable, Resolution of Generic Safety Issue (GSI) 191 (CAC Nos. MF2400-MF2409) ML16343A0422016-12-0808 December 2016 Request for Additional Information for the Review of the South Texas Project, Units 1 and 2 License Renewal Application (CAC NOS. ME4936, ME4937) ML16340A1022016-12-0505 December 2016 Requests for Additional Information for the Review of the South Texas Project License Renewal Application (CAC Nos. ME4936 and ME4937) ML16246A0952016-09-15015 September 2016 Correction to 8/26/16 Request for Additional Information Enclosure, License Amendment Request to Revise Technical Specification 5.3.2 to Allow Operation with 56 Full-Length Control Rod Assemblies ML16214A2912016-08-26026 August 2016 Summary of June 28-30, 2016, Regulatory Audit at Westinghouse in Rockville, MD, License Amendment Request to Revise Technical Specification 5.3.2 to Allow Operation with 56 Full-Length Control Rod Assemblies ML16187A0522016-07-0707 July 2016 Request for Additional Information Regarding License Renewal Application ML16141B0812016-05-31031 May 2016 Audit Summary, Risk Audit on April 12-13, 2016, at Alumni Center at the University of Texas, Austin, Tx; Pilot Generic Safety Issue 191 Submittal and Exemption Request, and Draft Request for Additional Information ML16125A2902016-05-26026 May 2016 Request for Additional Information, Risk Review, Exemption and License Amendment Request for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191 (CAC Nos. MF2400-MF2409) ML16127A4522016-05-12012 May 2016 Supplemental Information Needed for Acceptance of Requested Licensing Action, Amendment Request to Revise Technical Specification 5.3.2 to Allow Operation with 56 Full-Length Control Rod Assemblies ML16104A3522016-04-22022 April 2016 Requests for Additional Information Set 35 for the Review of the South Texas Project License Renewal Application (Tac Nos. ME4936, ME4937) ML16082A5072016-04-11011 April 2016 Request for Additional Information, Phased Response Requested, Exemption and License Amendment Request for a Risk-Informed Approach to Resolve Generic Safety Issue (GSI)-191 (CAC Nos. MF2400-MF2409) ML16082A4842016-03-22022 March 2016 NRR E-mail Capture - South Texas Project Units 1 & 2, Draft Request for Additional Information for Risk Review for GSI-191 ML16081A0042016-03-18018 March 2016 NRR E-mail Capture - South Texas Project Units 1 & 2, Draft Request for Additional Information for Thermal-hydraulic Review for GSI-191 2024-07-25
[Table view] |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 February 28,2012 Mr. D. W. Rencurrel Sr. Vice President, Technical Support and Oversight STP Nuclear Operating Company P.O. Box 289 Wadsworth,TX 77483
SUBJECT:
REQUESTS FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE SOUTH TEXAS PROJECT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION - AGING MANAGEMENT, SET 14 (TAC NOS. ME4936 AND ME4937)
Dear Mr. Rencurrel:
By letter dated October 25,2010, STP Nuclear Operating Company (STPNOC or the applicant) submitted an application pursuant to Title 10 of the Code of Federal Regulations, Part 54, to renew operating licenses NPF-76 and NPF-80 for South Texas Project, Units 1 and 2, for review by the US. Nuclear Regulatory Commission (NRC or the staff). The staff is reviewing the information contained in the license renewal application and has identified, in the enclosure, areas where additional information is needed to complete the review.
These requests for additional information were discussed with Arden Aldridge, and a mutually agreeable date for the response is within 30 days from the date of this letter. If you have any questions, please contact me at 301-415-3873 or bye-mail at john.daily@nrc.gov.
Sincerely,
~L~~
John W. Daily, Senior Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499 Enclosure As stated cc w/encl: Listserv
SOUTH TEXAS PROJECT, UNITS 1 AND 2.
REQUEST FOR ADDITIQNAL INFORMATION AGING MANAGEMENT, SET 14 (TAC NOS. ME4936 AND ME4937)
Open-Cycle Cooling Water System (021)
RAI82.1.9-1a
Background
Discussions with the applicant during the aging management program (AMP) audit indicated that the inclusion of cracking as an aging effect managed by the Open-Cycle Cooling Water System program was an error. The staff issued RAI B2.1.9-1 to confirm this. In its response dated September 15, 2011, the applicant revised license renewal application (LRA)
Sections A 1.9 and B2.1.9 to delete cracking as an aging effect in the Open-Cycle Cooling Water System program and stated no other sections of the LRA were identified that required revision for this error.
During its review of plant-specific operating experience, the staff noted that, in Licensee Event Reports (LERs) 499/2005-004 and 499/2010-001, cracking had apparently been identified in the heat affected zones for multiple welds in the aluminum bronze piping of the essential cooling water (ECW) system. Neither LER provided a cause of the crack initiation. The staff also noted that, as indicated in "Aluminum Bronze Alloys Corrosion Resistance Guide," Publication No. 80, Copper Development Association, 1981, a factor to consider in some grades of aluminum bronze is the formation of microfissures in the heat-affected zones during welding, which can act as stress raisers and increase the danger of stress corrosion cracking in subsequent service.
Issue Based on the identification of cracking in plant-specific operating experience, which has apparently occurred in the heat affected zones for multiple welds in aluminum bronze piping of the ECW system, it is unclear to the staff why cracking is not an aging effect that requires management for the associated material and environment combination.
Request Provide an aging management review (AMR) line item and propose an AMP to manage cracking of the aluminum bronze piping exposed to raw water in the ECW system or provide the technical bases giving reasonable assurance that the ECW components will continue to meet their licensing basis during the period of extended operation without managing this aging effect.
RAI 82.1.9-2a
Background
RAI B2.1.9-2 addressed plant-specific operating experience at STP which resulted in managing the loss of material due to cavitation erosion in the ECW system. The applicant's response to RAI B2.1.9-2 stated that erosion/corrosion is being managed by the Open-Cycle Cooling Water System program; however, it did not address the individual program elements affected by this enhancement to the AMP. Although certain aspects of the affected program elements may be ENCLOSURE
inferred from the response, the staff is not certain which program elements the applicant considers as being affected and in what specific manner.
With respect to extent of condition reviews performed for components in other systems, the response to RAI 82.1.9-2 stated "[IJocations in other systems were not evaluated [for erosion corrosion] because the unique material/environment combination of the ECW system is not found in the other systems and erosion has not been found in other systems." The staff noted that loss of material from cavitation erosion can occur in many different environments for many different materials. The staff also noted that, in its response to RAI 3.4.2.6-1, the applicant stated that it had identified six systems subject to wall thinning due to erosion-corrosion that are being managed by the Flow-Accelerated Corrosion program, and it was not clear to the staff what distinction was being drawn by the applicant for the term erosion corrosion between the two RAI responses.
Issue The applicant is managing loss of material due to cavitation erosion through the Open-Cycle Cooling Water System program, but did not provide information in the response to RAI 82.1.9-2 as to which specific program elements are affected by this enhancement and in what specific manner. In addition, the applicant appears to be using different definitions of the term erosion corrosion in its responses to RAJ 82.1.9-2 and RAI 3.4.2.6-1.
Request Describe the specific enhancement to the Open-Cycle Cooling Water System program, including the program elements affected, that has been implemented as a result of the loss of material identified in plant-specific operating experience discussed above. Also, clarify why the response to RAI 82.1.9-2 stated that erosion has not been found in other systems, when erosion was identified in six systems in the response to RAI 3.4.2.6-1.
RAI82.1.9-3a 8ackground RAI 82.1.9-3 addressed the potential problem associated with reduction in heat transfer in the ECW system caused by the degradation of the coatings used to mitigate loss of material. The RAI asked for information to show that the size and amount of debris, which could result from protective coating failures, will not affect intended function of the downstream components.
The response to RAJ 82.1.9-3 stated that inspections of protective coatings are conducted during general system inspections and during various preventive maintenance activities. The response also stated that the heat exchangers cooled by ECW are either periodically performance tested or are periodically inspected and cleaned if required. The response discussed instances where material from degraded coatings had been found in several ECW heat exchangers, but stated no sheeting-type coating failures had been observed. The response noted these coating failures had no impact on the heat exchangers' performance and concluded by stating that continued implementation of the Open-Cycle Cooling Water System program and the tracking of plant operating experience provides reasonable assurance that any fouling caused by protective coating failures will be adequately managed.
- 3 Issue Although STP has not experienced sheeting-type coating failures, on multiple occasions the coating failures have resulted in material of sufficient size to block various heat exchanger tubes. While these occasions to date have not adversely affected the intended functions of downstream components, these situations appear to be related to the amount of debris resulting from coating breakdowns as opposed to the inability of the debris from coating breakdowns to affect the intended function.
Request Provide past corrective actions that have either resulted in enhancements to the Open-Cycle Cooling Water System program or have resulted in changes to the coatings used in the ECW system to support the conclusion that the effects of aging will be adequately managed to maintain intended functions of downstream components.
RAI B2.1.9-4a
Background
RAI B2.1.9-4 asked for the technical bases to show that, without protective coatings, the loss of material due to worst case cavitation erosion will be adequately managed. The staff noted that the AMP basis document stated that coatings are not credited in aging management to protect metal surfaces. The response to RAI B2.1.9-4 states that it is acceptable if coatings erode away between inspections because the piping inspections ensure that the piping is repaired or replaced before it reaches the minimum allowable wall thickness. The response also stated that the wear rate is calculated from the measurement of wear and the previous inspection results, which is then used with conservatisms to calculate the lifetime of the component.
Issue Since the applicant states that it is acceptable for coatings to erode away between inspections, it is not clear to the staff how the lifetime of the component can be calculated because the amount of time that the coating has protected the component appears to be unknown. As a result, the staff would expect that the "conservatism" noted above in the applicant's response would assume the worst case loss of material which could occur between inspections without any coating. The applicant did not define the conservatisms used to calculate the lifetime of the component and how those conservatisms were established.
Request For each location where coatings are used in the ECW system, provide information relative to the conservatisms used in the calculation that establishes the lifetime of the component to demonstrate that the coatings are not credited in aging management to protect metal surfaces.
Heat Exchangers (085)
RAI 3.3.2.4-2
Background
SRP-LR Table 2.1-3 states that both the pressure boundary and heat transfer functions for heat exchangers should be considered because heat transfer may be a primary safety function of these components. The staff noted that the NRC provided this clarification of the SRP-LR to the industry by letter dated November 19, 1999 (see ADAMS Accession No. ML993350072). In
- 4 addition, the GALL Report,Section IX.F, "Aging Mechanisms," states that fouling can be categorized as particulate fouling from dust and that fouling can result in a reduction of heat transfer In RAI 3.3.2.4-1, the staff noted that heat exchangers with an intended function of heat transfer in various air environments were not being managed for reduction of heat transfer, and that these heat exchangers may be adversely affected by fouling due to dust. The staff requested STP to provide the technical bases demonstrating that reduction of heat transfer does not need to be managed for these components. In its response dated November 21,2011, STP stated that the heat exchanger components exposed to the environments of "plant indoor air" and "ventilation atmosphere" are located inside buildings that are subject to a clean air environment, since the outside air is filtered prior to entry into the associated buildings. The response concluded that the building air environment is not considered conducive to heat exchanger fouling and accumulation of dust on heat exchanger surfaces.
Issue Although outside air may be filtered prior to entry into the buildings, from a practical perspective, the air within the associated buildings cannot be considered a "clean air environment," because dust and debris are also generated inside the buildings during normal plant activities. If, however, the heat exchanger surfaces (like a room cooler) have air filters just prior to the component, that are periodically maintained, then the component could be considered to be exposed to a clear air environment. Otherwise, if the room air is circulated past heat exchanger surfaces without a filter that is periodically maintained, then the determination that this aging effect is not expected to occur would need to be confirmed. As noted in GALL AMP XI.M32, One-Time Inspection, "situations in which additional confirmation is appropriate include (a) an aging effect is not expected to occur, but data are insufficient to rule it out with reasonable confidence, or (b) an aging effect is expected to progress very slowly in the specified environment, but the local environment may be more adverse than generally expected."
Request For heat exchanger-related AMR items in the LRA that list an intended function of heat transfer in an environment of "plant indoor air," or "ventilation atmosphere," but do not consider reduction of heat transfer as an aging effect requiring management, either (a) provide information demonstrating that each item has an air filter that is periodically maintained reasonably close to the heat exchanger surfaces, (b) provide information from past inspections of components, which have never been cleaned, showing that fouling of heat exchanger surfaces in these environments is not occurring or is occurring so slowly that this aging effect does not require management, or (c) provide an appropriate program to manage reduction of heat transfer for the subject heat exchanger-related AMR items with a heat transfer function.
One-Time Inspection of ASME Code Class 1 Small-Bore Piping (036)
RAI B2.1.19-4
Background
In its RAI response dated January 18, 2012, the applicant indicated that its amendment, dated June 16, 2011, to the LRA provided sections with changes but did not provide the complete LRA Section B2.1.19 for the One-Time Inspection of ASME Code Class 1 Small-Bore Piping
- 5 program. The applicant further stated that the most recent revision to LRA Section B2.1.19 was provided in its letter dated November 17, 2011, which includes an exception to GALL AMP XI.M35, "One-Time Inspection of ASME Code Class 1 Small-Bore Piping."
The program exception states that the applicant's risk-informed inservice inspection (RI-ISI) is based on EPRI TR-112657, "Revised Risk-Informed Inservice Inspection Evaluation Procedure," which incorporated EPRI Report 1000701, "Interim Thermal Fatigue Management Guideline (MRP-24)." The exception also states that the applicant uses its RI-ISI, instead of MRP-24, to manage thermal fatigue in reactor coolant system branch lines. It further states that the recommended inspection locations in MRP-24 are identical to those for inspection of thermal fatigue in its RI-ISI.
Issue The staff noted that MRP-24 was superseded in 2005 by revised guidance, "Management of Thermal Fatigue in Normally Stagnant Non-Isolable Reactor Coolant System Branch Lines (MRP-146)." The staff further noted that MRP-146 and its supplement contain many improvements, including inspection locations, in managing thermal fatigue in reactor coolant system branch lines. GALL Report, Revision 2, recommends and references the revised guidance, MRP-146.
Given the different submittals provided by the applicant regarding this program, the staff needs clarification regarding the applicant's latest proposed One-Time Inspection of ASME Code Class 1 Small-Bore Piping program, specifically regarding whether the applicant intended to credit the previously proposed exception to GALL AMP XI.M35. As indicated above, the staff also does not find such exception acceptable as it does not provide a technical justification as to why use of the RI-ISI is sufficient when compared to the latest recommendation in GALL Report, Revision 2 (Le., MRP-146).
Request Provide or confirm the latest revision to the LRA with respect to the One-Time Inspection of ASME Code Class 1 Small-Bore Piping program.
As part of this submittal provide the technical basis to justify why the RI-ISI and its comparison to the outdated guidance in MRP-24 is adequate in managing thermal fatigue in reactor coolant system branch lines.
February 28, 2012 Mr. D. W. Rencurrel Sr. Vice President, Technical Support and Oversight STP Nuclear Operating Company P.O. Box 289 Wadsworth, TX 77483
SUBJECT:
REQUESTS FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE SOUTH TEXAS PROJECT. UNITS 1 AND 2, LICENSE RENEWAL APPLICATION - AGING MANAGEMENT, SET 14 (TAC NOS. ME4936 AND ME4937)
Dear Mr. Rencurrel:
By letter dated October 25, 2010, STP Nuclear Operating Company (STPNOC or the applicant) submitted an application pursuant to Title 10 of the Code of Federal Regulations, Part 54, to renew operating licenses NPF-76 and NPF-80 for South Texas Project, Units 1 and 2. for review by the U.S. Nuclear Regulatory Commission (NRC or the staff). The staff is reviewing the information contained in the license renewal application and has identified. in the enclosure, areas where additional information is needed to complete the review.
These requests for additional information were discussed with Arden Aldridge, and a mutually agreeable date for the response is within 30 days from the date of this letter. If you have any questions, please contact me at 301-415-3873 or bye-mail at john.daily@nrc.gov.
Sincerely, IRA!
John W. Daily. Senior Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-498 and 50-499
Enclosure:
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Letter to D. W. Rencurrel from John W. Daily dated February 28,2012
SUBJECT:
REQUESTS FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE SOUTH TEXAS PROJECT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION -AGING MANAGEMENT, SET 14 (TAC NOS. ME4936 AND ME4937)
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