Letter Sequence Supplement |
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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 ML11318A1472011-11-0303 November 2011 Drawing No. LR-STP-ED-5Q069F90011#1, Revision 1, Piping & Instrumentation Diagram Radioactive Vent and Drain System Fuel Handling Building Gravity Drains. 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
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Category:Letter type:NOC
MONTHYEARNOC-AE-230040, Supplement to Proposed Alternate Frequency to Containment Unbonded Post-Tensioning System Inservice Inspection (Relief Request RR-ENG-4-06)2023-12-14014 December 2023 Supplement to Proposed Alternate Frequency to Containment Unbonded Post-Tensioning System Inservice Inspection (Relief Request RR-ENG-4-06) NOC-AE-230039, Docket Nos. Stn 50-498, Stn 50-499 - Reply to a Notice of Violation, NRC Inspection Report 05000498/2023003 and 05000499/20230032023-12-12012 December 2023 Docket Nos. Stn 50-498, Stn 50-499 - Reply to a Notice of Violation, NRC Inspection Report 05000498/2023003 and 05000499/2023003 NOC-AE-230039, Submittal of Update Foreign Ownership, Control or Influence (FOCI)2023-07-11011 July 2023 Submittal of Update Foreign Ownership, Control or Influence (FOCI) NOC-AE-220039, Physical Security Plan, Training and Qualification Plan, Safeguards Contingency Plan, and Independent Spent Fuel Storage Installation Security Program Revision 252023-02-0606 February 2023 Physical Security Plan, Training and Qualification Plan, Safeguards Contingency Plan, and Independent Spent Fuel Storage Installation Security Program Revision 25 NOC-AE-220038, Independent Spent Fuel Storage Installation Registration of Dry Spent Fuel Storage Cask2022-06-23023 June 2022 Independent Spent Fuel Storage Installation Registration of Dry Spent Fuel Storage Cask NOC-AE-210038, Submittal of Operations Quality Assurance Plan Changes QA-089, QA-091, and Revision 252022-01-0404 January 2022 Submittal of Operations Quality Assurance Plan Changes QA-089, QA-091, and Revision 25 NOC-AE-21003858, 10 CFR 50.46 Thirty-Day Report of Significant ECCS Model Changes2021-12-0606 December 2021 10 CFR 50.46 Thirty-Day Report of Significant ECCS Model Changes NOC-AE-21003853, Revised Response to End of Enforcement Discretion and Request for Approval of Alternate Disposal Procedures for Very Low-Level Radioactive Material2021-12-0303 December 2021 Revised Response to End of Enforcement Discretion and Request for Approval of Alternate Disposal Procedures for Very Low-Level Radioactive Material NOC-AE-21003848, Unit 1 Cycle 24 Core Operating Limits Report2021-11-18018 November 2021 Unit 1 Cycle 24 Core Operating Limits Report NOC-AE-21003846, Response to End of Enforcement Discretion and Request for Approval of Alternate Disposal Procedures for Very Low-Level Radioactive Material2021-11-0404 November 2021 Response to End of Enforcement Discretion and Request for Approval of Alternate Disposal Procedures for Very Low-Level Radioactive Material NOC-AE-21003842, 10 CFR 50.59 Summary Report2021-09-23023 September 2021 10 CFR 50.59 Summary Report NOC-AE-21003841, Request for Relief from ASME Section Xl Code Requirements for Weld Examinations (Relief Request RR-ENG-3-25)2021-09-23023 September 2021 Request for Relief from ASME Section Xl Code Requirements for Weld Examinations (Relief Request RR-ENG-3-25) NOC-AE-21003832, Supplement to License Amendment Request to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections2021-09-0909 September 2021 Supplement to License Amendment Request to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections NOC-AE-21003812, Application to Revise Technical Specifications to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections2021-08-10010 August 2021 Application to Revise Technical Specifications to Adopt TSTF-577, Revised Frequencies for Steam Generator Tube Inspections NOC-AE-21003825, Update of Foreign Ownership, Control, or Influence Information (FOCI)2021-08-0505 August 2021 Update of Foreign Ownership, Control, or Influence Information (FOCI) NOC-AE-21003824, Update Foreign Ownership, Control, or Influence (FOCI)2021-07-29029 July 2021 Update Foreign Ownership, Control, or Influence (FOCI) NOC-AE-21003823, Update Foreign Ownership Control or Influence (FOCI)2021-07-28028 July 2021 Update Foreign Ownership Control or Influence (FOCI) NOC-AE-21003820, Nuclear Insurance Protection2021-07-20020 July 2021 Nuclear Insurance Protection NOC-AE-21003819, Inservice Inspection Summary Report - 2RE212021-07-15015 July 2021 Inservice Inspection Summary Report - 2RE21 NOC-AE-21003816, Commitment Change Summary Report2021-06-30030 June 2021 Commitment Change Summary Report NOC-AE-21003814, Technical Specification Bases Control Program2021-06-24024 June 2021 Technical Specification Bases Control Program NOC-AE-21003810, Update Foreign Ownership, Control, or Influence (FOCI)- CPS Energy2021-06-17017 June 2021 Update Foreign Ownership, Control, or Influence (FOCI)- CPS Energy NOC-AE-21003811, Update Foreign Ownership, Control, or Influence (FOCI)- Nrg Energy2021-06-17017 June 2021 Update Foreign Ownership, Control, or Influence (FOCI)- Nrg Energy NOC-AE-21003806, Inservice Inspection Program Plan and Inservice Testing Program Snubber Inservice Test Plan for the Fourth Ten-Year Interval2021-05-20020 May 2021 Inservice Inspection Program Plan and Inservice Testing Program Snubber Inservice Test Plan for the Fourth Ten-Year Interval NOC-AE-21003801, Annual Dose Report for 20202021-04-26026 April 2021 Annual Dose Report for 2020 NOC-AE-21003802, 2020 South Texas Project Electric Generating Station Annual Environmental Operating Report2021-04-26026 April 2021 2020 South Texas Project Electric Generating Station Annual Environmental Operating Report NOC-AE-21003804, Operator Licensing Examination Schedule2021-04-21021 April 2021 Operator Licensing Examination Schedule NOC-AE-21003800, Radioactive Effluent Release Report2021-04-19019 April 2021 Radioactive Effluent Release Report NOC-AE-21003799, Changes to South Texas Project Electric Generating Station (STPEGS) Emergency Plan2021-04-15015 April 2021 Changes to South Texas Project Electric Generating Station (STPEGS) Emergency Plan NOC-AE-21003795, Cycle 22 Core Operating Limits Report2021-04-15015 April 2021 Cycle 22 Core Operating Limits Report NOC-AE-21003796, Update Foreign Ownership, Control, or Influence (FOCI)2021-04-15015 April 2021 Update Foreign Ownership, Control, or Influence (FOCI) NOC-AE-21003791, Financial Assurance for Decommissioning - 2021 Update2021-03-31031 March 2021 Financial Assurance for Decommissioning - 2021 Update NOC-AE-21003790, Response to Apparent Violations in NRC Inspection Report 05000498/2020401 and 05000499/2020401: (EA-20-122) (Letter)2021-03-31031 March 2021 Response to Apparent Violations in NRC Inspection Report 05000498/2020401 and 05000499/2020401: (EA-20-122) (Letter) NOC-AE-210037, STP Fire Hazards Analysis Report, Amendment 26 (Redacted)2021-03-30030 March 2021 STP Fire Hazards Analysis Report, Amendment 26 (Redacted) NOC-AE-21003792, STP Fire Hazards Analysis Report, Amendment 26 (Redacted)2021-03-30030 March 2021 STP Fire Hazards Analysis Report, Amendment 26 (Redacted) NOC-AE-200037, License Amendment Request to Revise Technical Specification 3.6.3 to Append a Note and Remove the Index from Technical Specifications2021-03-11011 March 2021 License Amendment Request to Revise Technical Specification 3.6.3 to Append a Note and Remove the Index from Technical Specifications NOC-AE-21003784, Response to Request for Additional Information Regarding 1RE22 Inspection Summary Report for Steam Generator Tubing2021-03-0808 March 2021 Response to Request for Additional Information Regarding 1RE22 Inspection Summary Report for Steam Generator Tubing NOC-AE-21003786, Annual Fitness for Duty Performance Report for 20202021-03-0101 March 2021 Annual Fitness for Duty Performance Report for 2020 NOC-AE-21003785, Evidence of Financial Protection2021-02-23023 February 2021 Evidence of Financial Protection NOC-AE-21003781, Notice Regarding Withdrawal of Funds from Nuclear Decommissioning Trust Subaccounts2021-01-27027 January 2021 Notice Regarding Withdrawal of Funds from Nuclear Decommissioning Trust Subaccounts NOC-AE-21003780, Submittal of Update Foreign Ownership, Control, or Influence (FOCI)2021-01-0707 January 2021 Submittal of Update Foreign Ownership, Control, or Influence (FOCI) NOC-AE-20003778, Changes to South Texas Project Electric Generating Station Emergency Plan2020-12-17017 December 2020 Changes to South Texas Project Electric Generating Station Emergency Plan NOC-AE-20003777, STPNOC Concerns Regarding the Proposed Change to the Evaluated Force-on-Force Inspection Guidance During the COVID-19 Public Health Emergency2020-12-10010 December 2020 STPNOC Concerns Regarding the Proposed Change to the Evaluated Force-on-Force Inspection Guidance During the COVID-19 Public Health Emergency NOC-AE-20003766, Supplement to Change Implementation Date for License Amendment Request to Revise the STPEGS Emergency Plan2020-12-0202 December 2020 Supplement to Change Implementation Date for License Amendment Request to Revise the STPEGS Emergency Plan NOC-AE-20003767, Request for a One-Time Exemption from 10 CFR 73, Appendix 8, Section VI, Subsection C.3.(1)(1) Regarding Annual Force-on-Force (FOF) Exercises, Due to Covid 19 Pandemic2020-11-16016 November 2020 Request for a One-Time Exemption from 10 CFR 73, Appendix 8, Section VI, Subsection C.3.(1)(1) Regarding Annual Force-on-Force (FOF) Exercises, Due to Covid 19 Pandemic NOC-AE-20003765, Inservice Testing Program Description for the Fourth Ten-Year Interval2020-10-28028 October 2020 Inservice Testing Program Description for the Fourth Ten-Year Interval NOC-AE-20003764, 1 RE22 Inspection Summary Report for Steam Generator Tubing2020-10-0707 October 2020 1 RE22 Inspection Summary Report for Steam Generator Tubing NOC-AE-20003762, Supplement to License Amendment Request to Revise Technical Specifications to Adopt TSTF-374, Revision 0, Revision to TS 5.5.13 and Associated TS Bases for Diesel Fuel Oil Using the Consolidated Line Item Improvemen2020-09-22022 September 2020 Supplement to License Amendment Request to Revise Technical Specifications to Adopt TSTF-374, Revision 0, Revision to TS 5.5.13 and Associated TS Bases for Diesel Fuel Oil Using the Consolidated Line Item Improvemen NOC-AE-20003761, Supplement to Exemption Request from 10 CFR 50 Appendix E Due to COVID-19 Pandemic2020-09-10010 September 2020 Supplement to Exemption Request from 10 CFR 50 Appendix E Due to COVID-19 Pandemic NOC-AE-20003760, Update Foreign Ownership. Control. or Influence(FOCI)- Transmittal2020-09-0808 September 2020 Update Foreign Ownership. Control. or Influence(FOCI)- Transmittal 2023-07-11
[Table view] |
Text
LMmi" Nuclear Operating Company U AEW South Texas ProjectElectric Generatin$Station P.. Box 28,9 Wadsworth. Texas 77483 "/X/V\l May 10, 2012 NOC-AE-12002854 10 CFR 54 STI: 33544699 File: G25 U. S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738 South Texas Project 1, Units 1 and 2 Docket Nos. STN 50-498, STN 50-499 Response to Requests for Additional Information (RAI) B2.1.9-3 (Supplement) for the South Texas Proiect License Renewal ADDlication (TAC Nos. ME4936 and ME4937)
References:
- 1. STPNOC letter dated October 25, 2010, from G. T. Powell to NRC Document Control Desk, "License Renewal Application" (NOC-AE-1 0002607)
(ML103010257)
- 2. STPNOC letter dated November 21, 2011 from D. W. Rencurrel to NRC Document Control Desk, "Response to Requests for Additional Information for the South Texas Project License Renewal Application (TAC Nos. ME4936 and ME4937)" (NOC-AE-1 1002742) (ML11335A131)
- 3. STPNOC letter dated March 28, 2012 from D. W. Rencurrel to NRC Document Control Desk, "Response to Requests for Additional Information for the South Texas Project License Renewal Application Aging Management Program, Set 14 (TAC Nos. ME4936 and ME4937)" (NOC-AE-1 2002811) (ML12097A064)
- 4. Teleconference between STPNOC and the NRC, "Request for Additional Information STP Units 1 and 2 License Renewal Application Aging Management of Internal Coatings of ECW Piping RAI B2.1.9.3B April 24, 2012" (ML12122A002)
By Reference 1, STP Nuclear Operating Company (STPNOC) submitted a License Renewal Application (LRA) for South Texas Project (STP) Units 1 and 2. By References 2 and 3, STPNOC provided responses to Request for Additional Information (RAI) Item B2.1.9-3. By Reference 4, STPNOC agreed to supplement the responses to RAI Item B2.1.9-3. The supplemental response is provided in the Enclosure to this letter.
There are no regulatory commitments in this letter.
L4-7 0Tk
NOC-AE-12002854 Page 2 Should you have any questions regarding this letter, please contact either Arden Aldridge, STP License Renewal Project Lead, at (361) 972-8243 or Ken Taplett, STP License Renewal Project regulatory point-of-contact, at (361) 972-8416.
I declare under penalty of perjury that the foregoing is true and correct.
Executed on W. Rencurrel Chief Nuclear Officer KJT
Enclosure:
STPNOC Supplemental Response to RAI B2.1.9-3
NOC-AE-1 2002854 Page 3 cc:
(paper copy) (electronic copy)
Regional Administrator, Region IV A. H. Gutterman, Esquire U. S. Nuclear Regulatory Commission Kathryn M. Sutton, Esquire 1600 East Lamar Boulevard Morgan, Lewis & Bockius, LLP Arlington, Texas 76011-4511 Balwant K. Singal John Ragan Senior Project Manager Chris O'Hara U.S. Nuclear Regulatory Commission Jim von Suskil One White Flint North (MS 8B1) NRG South Texas LP 11555 Rockville Pike Rockville, MD 20852 Senior Resident Inspector Kevin Polio U. S. Nuclear Regulatory Commission Richard Pena P. 0. Box 289, Mail Code: MN1 16 City Public Service Wadsworth, TX 77483 C. M. Canady Peter Nemeth City of Austin Crain Caton & James, P.C.
Electric Utility Department 721 Barton Springs Road C. Mele Austin, TX 78704 City of Austin John W. Daily Richard A. Ratliff License Renewal Project Manager (Safety) Alice Rogers U.S. Nuclear Regulatory Commission Texas Department of State Health Services One White Flint North (MS 011-Fl)
Washington, DC 20555-0001 Tam Tran Balwant K. Singal License Renewal Project Manager John W. Daily (Environmental) Tam Tran U. S. Nuclear Regulatory Commission U. S. Nuclear Regulatory Commission One White Flint North (MS O11F01)
Washington, DC 20555-0001
Enclosure NOC-AE-1 2002854 Page 1 of 6 STPNOC Supplemental Response to RAI B2.1.9-3 REQUEST FOR ADDITIONAL INFORMATION STP UNITS 1 AND 2 LICENSE RENEWAL APPLICATION AGING MANAGEMENT OF INTERNAL COATINGS OF ECW PIPING RAI B2.1.9-3B APRIL 24, 2012 The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of STP Nuclear Operating Company (STPNOC or the applicant) held a telephone conference call on April 24, 2012, to discuss staff concerns related to aging management for internal coatings of essential cooling water piping, in the South Texas Project, Units 1 and 2, license renewal application.(LRA). The telephone conference call was useful in clarifying staff concerns on the issue.
NRC RAI in Reference 4 The discussion centered on the issue of internal (Belzona) coatings in the essential cooling water (ECW) system and whether there was a need to manage the aging effect of fouling of downstream components from pieces that might break off from the internal Belzona coatings in use by the applicant.
The staff expressed its concerns that both industry and plant-specific operating experience have indicated erosions or other instances where the coating has broken off from its installed location and carried downstream where it could potentially clog heat exchangers or otherwise cause fouling of the same. In some recent cases sheet-type failures of the coating have occurred. The staff also stated that contact with industry experts in Belzona indicated that inspection using a "more than visual" approach-such as some sort of physical-mechanical contact-would be necessary to properly inspect an internal Belzona coating. The staffs latest draft RAI, RAI B2.1.9-3b, asks the applicant to state whether there are ECW system locations where intended functions of downstream components could be affected by coating failures. If that is the case, the applicant should revise its LRA to include AMR items in appropriate Table 2s for managing fouling due to coating degradation, and to consider whether its Open Cycle Cooling Water Program should be updated to reflect managing the effect by appropriate types of inspections and inspection frequencies.
The applicant discussed its Belzona operating experience and stated that there have not been coating failures that resulted in any cooling water heat exchanger tube blockage, and there has been no plugging of tubes by Belzona coatings. The applicant also stated that the type of Belzona coating it uses dries to a "phenolic" hardness, and that it does not have the flex or elastic capability to gradually pull away from (or bubble up from) the inner surface to which it had been applied. The applicant also stated that its understanding of the term "fouling" for heat exchangers is included in its aging effect "loss of/reduction of heat transfer" and that examples from its current Table 2s illustrate this. It also stated that the instances of coating
Enclosure NOC-AE-1 2002854 Page 2 of 6 used in the immediate down-stream vicinity of ECW valves are in locations where, if portions broke away, they would be carried out into the ECW cooling pond and would not foul any heat exchangers. Finally, the applicant stated that, in some cases, coatings inside heat exchanger end bells or reversing chambers, or coatings applied to pump discharge volutes are in locations where portions that might break away could potentially impact downstream strainers, heat exchangers or etc.
The applicant agreed that it would take the staffs concerns into account and provide supplemental information intended to address and resolve them, including, as appropriate, examples of AMRs that the applicant believes illustrate that it is managing reduction of heat transfer in at least some cases.
The staff and the applicant agreed that this information would be contained in a supplemental response by the applicant to RAI B2.1.9-3, and that as a result, draft RAI B2.1.9-3b would be dropped. The staff indicated that this would remain an open item in the SER until receipt of information that could resolve the staff concerns.
STPNOC Supplemental Response Summary of STPNOC responses to RAI B2.1.9-3 from References 2 and 3 Certain components in the Essential Cooling Water (ECW) System are coated to protect the underlying metal surfaces from being exposed to the erosive or corrosive effects of the open-cycle cooling water. The three types of coatings are Belzona, Plasticap 400 Epoxy Phenolic, and coal tar epoxy. The essential chiller condenser, standby diesel generator (SDG) lube oil cooler, jacket water cooler, and intercooler water boxes are coated with Belzona 1321 (Belzona 1391 has also been approved for the diesel generator coolers). Interconnecting piping for the intercoolers is lined with Plasticap 400 Epoxy Phenolic. The ECW Intake bay traveling screens are coated with coal tar epoxy. The ECW Pumps are coated with Belzona 1341. Belzona 1341 has also been applied to eroded surfaces of the ECW pump discharge piping 30x24 inch reducer. The piping near the Component Cooling Water (CCW) System heat exchanger ECW return throttle valves is coated with Belzona 2141 and the ECW return throttle valves are coated with Belzona 1341.
The coated ECW pumps are upstream of self-cleaning strainers. The self-cleaning strainers are designed to prevent material larger than 1/16" from entering the component cooling water heat exchangers. The self-cleaning strainer mesh size is smaller than the heat exchanger tubes and serves to protect the heat exchangers from particles greater than 1/16". The coating is inspected during pump disassembly. ECW pump disassembly is scheduled as a refurbishment activity and controlled by the Major Pump and Motor Maintenance Plan. This maintenance plan has a nominal 10 year refurbishment periodicity.
The coated piping near the Component Cooling Water (CCW) System heat exchanger and the coated ECW return throttle valves are downstream of the heat exchangers. Failed Belzona
Enclosure NOC-AE-12002854 Page 3 of 6 coating from these locations does not pass through the CCW System exchangers, but instead flows to piping that returns to the ECW pond. The piping coatings are inspected every five years during planned maintenance PM activities.
The essential chiller condenser, SDG lube oil cooler, SDG jacket water cooler, and SDG intercooler water boxes are inspected every five years.
Interconnecting SDG intercoolers piping is inspected every five years as part of the periodic intercooler inspection.
The ECW intake bay traveling screens upstream of the self-cleaning strainers are inspected during PM activities.
The CCWSystem heat exchangers are periodically performance-tested to verify their heat transfer capabilities. The CCW System heat exchangers are inspected and cleaned on demand based on performance test results. The other safety-related heat exchangers cooled by the ECW System are periodically inspected and cleaned, if required.
Although STP has experienced erosion of coatings in the ECW system, no sheeting-type coating failures have been observed.
General system inspections are performed for macroscopic fouling, biofouling, sediment, corrosion, erosion, pitting, crevice corrosion, and coating failure such as cracks, holes or blister. Various preventive maintenance activities provide for inspection of protective coatings.
The acceptance criteria for coatings are that no erosion, corrosion, blistering, flaking or peeling of the coatings is observed. Coatings not meeting these criteria are considered degraded and a condition report (CR) is initiated to document and resolve the concern.
Continued implementation of the Open-Cycle Cooling Water System program (B2.1.9) and the tracking of plant operating experience provide reasonable assurance that any fouling of in-scope heat exchangers caused by protective coating failures will be adequately managed and will not affect the intended functions of the ECW System heat exchangers.
Supplemental information in response to Reference 4 Heat exchangers exposed to raw water that have a potential of macroscopic fouling due to coating degradation are managed for fouling effects using the following LRA AMR line items.
The aging effect, reduction of heat transfer, is managed using AMP B2.1.9, Open-Cycle Cooling Water System. Applicable LRA tables are provided below:
Enclosure NOC-AE-12002854 Page 4 of 6 Table 3.3.2-4 Auxiliary Systems - Summary of Aging Management Evaluation - Essential Cooling Water and ECW Screen Wash System Component Intended Material Environment Aging Effect. Aging NUREG- Table I Notes Type Function Requiring *Management 1801 Item Management Program. Vol. 2
... _ ...',__ __'Item :__.. ..
Heat HT, PB Copper Raw Water Reduction of heat Open-Cycle VII.C1-6 3.3.1.83 B Exchanger Alloy (Int) transfer Cooling Water (CCW Pump System (B2.1.9)
Room)
Table 3.3.2-6 Auxiliary Systems - Summary of Aging Management Evaluation - Component Cooling Water System Component Intended Material Environment Aging Effect Aging NUREG- Table I Notes Type Function Requiring Management 1801 Item Management Program Vol. 2
- __._"_" '_Item Heat HT, PB Titanium Raw Water Reduction of heat Open-Cycle None None F Exchanger (Int) transfer Cooling Water (CCW Heat System (B2.1.9)
Exchanger)
Table 3.3.2-9 Auxiliary Systems - Summary of Aging Management Evaluation - Chilled Water HVAC System Component Intended Material Environment Aging Effect Aging NUREG- Table I Notes Type Function Requiring Management 1801 Item Management. Program Vol. 2 Item Heat HT, PB Titanium Raw Water Reduction of heat Open-Cycle None None F Exchanger (Int) transfer Cooling Water (AHU System (B2.1.9)
Condenser)
Enclosure NOC-AE-12002854 Page 5 of 6 Table 3.3.2-20 Auxiliary Systems - Summary of Aging Management Evaluation - Standby Diesel Generator and Auxiliaries Component Intended Material Environment Aging Effect Aging NUREG- Table I Notes Type Function Requiring Management 1801 Item Management Program Vol. 2 Item Heat HT, PB Titanium Raw Water Reduction of heat Open Cycle None None F Exchanger (Int) transfer Cooling Water (DG Jacket System (B2.1.9)
Water)
Heat HT, PB Titanium Raw Water Reduction of heat Open-Cycle None None F Exchanger (Int) transfer Cooling Water (DG Lube System (B2.1.9)
Oil)
Heat HT, PB Titanium Raw Water Reduction of heat Open-Cycle None None F Exchanger (Int) transfer Cooling Water (DG Turbo System (B2.1.9)
Air Intercooler)
The use of internal component coatings is controlled by the South Texas Project (STP) design configuration control process and is managed by the preventive maintenance or corrective action programs.
Per the vendor, Belzona 1111 (Super Metal), 1311 ( Ceramic R Metal), 1321 (Ceramic S-Metal),
1341 (Supermetalglide), 1391 (Ceramic HT), and 2141 (ACR-Fluid Elastomer) coatings are not expected to delaminate in large flakes or sheets when applied in accordance with the recommended application instructions. STP installs these coating in accordance with the recommended application instructions and has not experienced any large flaking or sheet failures.
The Belzona application data sheets for the products used do not specify the use of a physical-mechanical contact type of test for cure or adhesion verification. The vendor for Belzona states that testing, such as a pull-off adhesion test, could be used to prove that the coating has not lost any adhesive or cohesive properties. However, this testing results in destruction of the coating.
Aging management program B2.1.9, Open Cycle Cooling Water System, manages the heat exchangers for reduction of heat transfer due to fouling and coatings are visually inspected every five years. Degraded or damaged coatings are documented under the STP corrective action program. Coating repairs are performed using work management control and coating application permit processes.
Plasticap 400 coating is a flexible, thin, baked-on coating. Plasticap 400 Epoxy Phenolic was applied to the internals of the interconnecting piping for the SDG intercoolers by the plant modification process. The evaluation for this modification (Ref: STP Unreviewed Safety Question Evaluation 89-026) concluded that the coating will not separate from the pipe wall in sheets or
Enclosure NOC-AE-12002854 Page 6 of 6 other configurations that could block intercooler tubes after prolonged exposure to ECW System raw water or vibration or earthquake induced pipe deflection. The failure mechanism of this coating application determined after high temperature and pressure testing is blistering. Degraded or damaged coatings are documented under the STP corrective action program and repairs are performed using the work management control and coating application permit processes.
In summary, the permanent coatings applied at STP have not demonstrated any operating experience where the coating has broken off from its installed location and fouled downstream heat exchangers in a manner that adversely affected their intended function. When properly applied, Belzona coatings are not expected to delaminate in large flakes or sheets between inspection intervals. The Open Cycle Cooling Water System program (B2.1.20) in addition to performance testing, requires periodic inspection and cleaning of ECW heat exchangers, and periodic inspection of internals where coatings are applied. Operating history demonstrates that the effects of aging are being managed adequately by the Open Cycle Cooling Water System,.
program (B2.1.20) to maintain the intended functions of the ECW system through the period of extended operation.