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MONTHYEARNOC-AE-08002287, Due Date Extension for Three-Month Response to Generic Letter 2008-012008-04-0909 April 2008 Due Date Extension for Three-Month Response to Generic Letter 2008-01 Project stage: Request NOC-AE-08002284, Three-Month Response to Generic Letter 2008-012008-05-12012 May 2008 Three-Month Response to Generic Letter 2008-01 Project stage: Request ML0819004452008-07-29029 July 2008 Approval of Extension for 3-Month Extension to Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems Project stage: Other ML0821104352008-08-0101 August 2008 Request for Additional Information Reactor Equipment Cooling System Project stage: RAI ML0825600052008-09-22022 September 2008 Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems, Proposed Alternate Course of Action Project stage: Other NOC-AE-08002355, Nine-Month Response to Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems.2008-10-13013 October 2008 Nine-Month Response to Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems. Project stage: Other NOC-AE-09002384, Nine-Month Supplemental Response to Generic Letter 2008-012009-01-22022 January 2009 Nine-Month Supplemental Response to Generic Letter 2008-01 Project stage: Supplement ML0928600792009-10-13013 October 2009 Request for Additional Information GL 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems Project stage: RAI NOC-AE-10002511, Month Supplemental Response to Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal and Containment Spray Systems.2010-02-16016 February 2010 Month Supplemental Response to Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal and Containment Spray Systems. Project stage: Supplement NOC-AE-10002579, Nine-Month Supplemental Response to Generic Letter 2008-012010-07-27027 July 2010 Nine-Month Supplemental Response to Generic Letter 2008-01 Project stage: Supplement ML1115805052011-06-10010 June 2011 Closeout of Generic Letter 2008-01, Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems Project stage: Other 2008-09-22
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Category:Letter type:NOC
MONTHYEARNOC-AE-240040, Operator Licensinq Examination Schedule Revision 32024-05-15015 May 2024 Operator Licensinq Examination Schedule Revision 3 NOC-AE-240040, Annual Dose Report for 20232024-04-29029 April 2024 Annual Dose Report for 2023 NOC-AE-240040, Financial Assurance for Decommissioning - 2024 Update2024-03-28028 March 2024 Financial Assurance for Decommissioning - 2024 Update NOC-AE-240040, Response to Request for Additional Information for Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation2024-03-21021 March 2024 Response to Request for Additional Information for Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation NOC-AE-240040, Unit L & 2, Supplement to Modify the Implementation Date for License Amendment Request to Revise Alternate Source Term Dose Calculation2024-02-0808 February 2024 Unit L & 2, Supplement to Modify the Implementation Date for License Amendment Request to Revise Alternate Source Term Dose Calculation 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-230040, Update Foreign Ownership, Control, or Influence (FOCI)2023-12-0505 December 2023 Update Foreign Ownership, Control, or Influence (FOCI) 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-21003796, Update Foreign Ownership, Control, or Influence (FOCI)2021-04-15015 April 2021 Update Foreign Ownership, Control, or Influence (FOCI) NOC-AE-21003795, Cycle 22 Core Operating Limits Report2021-04-15015 April 2021 Cycle 22 Core Operating Limits Report 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-21003791, Financial Assurance for Decommissioning - 2021 Update2021-03-31031 March 2021 Financial Assurance for Decommissioning - 2021 Update 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 2024-05-15
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Nuclear Operating Company South Texas ProjectElectric GeneratingStation PO Box 289 Wadsworth. Texas 77483 A/A --
July 27, 2010 NOC-AE-1 0002579 10 CFR 50.54(f)
U.S. Nuclear Regulatory Commission One White Flint North ATTN: Document Control Desk 11555 Rockville Pike Rockville, MD 20852 South Texas Project Units 1 and 2 Docket No. STN 50-498, STN 50-499 Nine-Month Supplemental Response to Generic Letter 2008-01 (TAC Nos. MD7881 and MD7882)
References:
1 .NRC Generic Letter 2008-01, "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems," dated January 11, 2008
- 2. Letter from Mohan C. Thadani to Edward D. Halpin dated September 22, 2008, South Texas Project, Units 1 and 2 - Generic Letter 2008-01, "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems, Proposed Alternative Course of Action and Request for Additional Information" (TAC Nos. MD7881 and MD7882)
- 3. Letter from G. T. Powell to NRC Document Control Desk dated October 13, 2008, "Nine-Month Response to Generic Letter 2008-01" (NOC-AE-08002355)
(ML082960430)
The Nuclear Regulatory Commission (NRC) issued Generic Letter (GL) 2008-01 (Reference 1) to request that each licensee evaluate the emergency core cooling, decay heat removal, and containment spray systems to ensure that gas accumulation is maintained less than the amount that challenges operability of these systems, and that appropriate action is taken when conditions adverse to quality are identified.
The enclosure provides the results of evaluations performed following South Texas Project Unit 2 refueling outage 2RE14 completed in the spring of 2010 consistent with Reference 2 and committed to in Reference 3.
In summary, STP Nuclear Operating Company (STPNOC) has concluded that, based on the reviews of the plant configuration, plant-specific operating experience, and procedures, the subject systems/functions comply with the current licensing and design bases and applicable regulatory requirements. System piping walk-downs and slope determinations performed have not yielded any information to alter this conclusion. All identified systems are capable of performing their design function.
There are no new commitments in this letter.
STI: 32707888 A member of the STARS (Strategic Teaming and Resource sharing) Alliance Callaway - Comanche Peak - Diablo Canyon - Palo Verde - San Onofre - South Texas Project - Wolf Creek " "I-
NOC-AE-10002579 Page 2 If there are any questions or if additional information is needed, please contact either Mr. Wayne Harrison at 361-972-7298 or me at 361-972-7566.
I declare under penalty of perjury that the foregoing is true and correct.
Executed on X0, I 2*7 I ?.MO G. T. Powell Vice President, Engineering JAL/RSE
Enclosure:
Nine-Month Supplemental Response to NRC Generic Letter 2008-01, "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems"
NOC-AE-1 0002579 Page 3 cc:
(paper copy) (electronic copy)
Regional Administrator, Region IV A. H. Gutterman, Esquire U. S. Nuclear Regulatory Commission Morgan, Lewis & Bockius LLP 612 East Lamar Blvd, Suite 400 Arlington, Texas 76011-4125 Mohan C. Thadani U. S. Nuclear Regulatory Commission Mohan C. Thadani John Ragan Senior Project Manager Catherine Callaway U.S. Nuclear Regulatory Commission Jim von Suskil One White Flint North (MS 8B1A) NRG South Texas LP 11555 Rockville Pike Rockville, MD 20852 Richard Pena Senior Resident Inspector Ed Alarcon U. S. Nuclear Regulatory Commission Kevin Polio P. O. Box 289, Mail Code: MN116 City Public Service Wadsworth, TX 77483
- C. M. Canady Jon C.. Wood City of Austin Cox Smith Matthews Electric Utility Department 721 Barton Springs Road C. Mele Austin, TX 78704 City of Austin Richard A. Ratliff Texas Department of State Health Services Alice Rogers Texas Department of State Health Services
Enclosure 1 NOC-AE-10002579 Page 1 of 3 Nine-Month Supplemental Response to NRC Generic Letter 2008-01, "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems" This enclosure describes the results of evaluations performed pursuant to Generic Letter 2008-01 on previously incomplete activities, such as system piping walkdowns, at the South Texas Project (STP). This supplement addresses results of design evaluation reviews conducted since the October 13, 2008 submittal (Reference 3).
The original conclusions documented in the Nine-Month response (Reference 3) with respect to the licensing basis evaluation, testing evaluations, and corrective action evaluations have not changed.
A. EVALUATION RESULTS
- 1. Design Basis Documents No changes have been made to any STP design basis documents as a result of evaluations performed for this GL response.
- 2. Confirmatory Walkdowns In the Nine-Month response, (Reference 3), STPNOC committed to complete the following:
0 Complete the slope survey of inaccessible piping in Unit 2 during the spring outage of 2010 and provide a report within 90 days after completion of the outage.
STP slope survey and evaluation of normally inaccessible piping in Unit 2 is complete.
This activity involved slope surveys of applicable GL 2008-01 systems piping in the Unit 2 Reactor Containment Building. Much of the piping required scaffolding to provide proper access to perform the slope surveys.
The piping slope surveys were performed using conventional surveying tools (laser level equipment). The activity involved both insulated and un-insulated inaccessible piping.
On insulated piping, the insulation was temporarily removed as necessary to gain access to the pipe surface. Additionally, ultrasonic examination of selected pump suction piping was performed.
Industry guidance was utilized to determine the applicable acceptance criteria and in the assessment of the data. For pump suction piping, industry guidance provided by the Nuclear Energy Institute (NEI) was utilized to perform the evaluations (Reference 6).
For pump discharge piping evaluations, industry guidance provided by the Pressurized Water Reactor Owners Group (PWROG) was utilized (Reference 7). A PWROG Position Paper providing guidance on the quantities of non-condensable gases that can enter the RCS from the ECCS piping was also utilized as required in the evaluations (Reference 8). The results of the slope surveys, assessment of data, and the evaluations performed on the subject piping were found to be acceptable.
Enclosure 1 NOC-AE-1 0002579 Page 2 of 3 Nine-Month Supplemental Response to NRC Generic Letter 2008-01, "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems"
- 3. Vent Valves No new vent locations or modifications to existing vent valves were found to be necessary as a result of the slope surveys or the evaluations performed.
- 4. Procedures No additional procedures or additional procedure revisions were considered necessary as a result of the slope surveys or the evaluations performed.
B. DESCRIPTION OF NECESSARY ADDITIONAL CORRECTIVE ACTIONS
- 1. Additional Corrective Actions As a result of the slope surveys and evaluations performed, no additional corrective actions were required.
- 2. Corrective Action Updates No updates or changes to previous corrective actions have been identified as a result of the slope surveys and evaluations.
Conclusion STPNOC has completed the slope surveys and evaluations of the normally inaccessible portions of GL systems piping in Unit 2 and has concluded they are in compliance with the current licensing and design bases and applicable regulatory requirements and remain capable of performing their design function.
This completes the STPNOC response to the regulatory commitments described in Reference 3.
Enclosure 1 NOC-AE-1 0002579 Page 3 of 3 Nine-Month Supplemental Response to NRC Generic Letter 2008-01, "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems"
References:
- 1. NRC Generic Letter 2008-01, "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems," dated January 11, 2008
- 2. Letter from Mohan C. Thadani to Edward D. Halpin dated September 22, 2008, South Texas Project, Units 1 and 2 - Generic Letter 2008-01, "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems, Proposed Alternative Course of Action and Request for Additional Information" (TAC Nos. MD7881 and MD7882) (ST-AE-NOC-08001809)
- 3. Letter from G. T. Powell to NRC Document Control Desk dated October 13, 2008, "Nine-Month Response to Generic Letter 2008-01" (ML082960430) (NOC-AE-08002355)
- 4. Letter from G. T. Powell to NRC Document Control Desk dated January 22, 2009, "Nine Month Supplemental Response to Generic Letter 2008-01" (ML090330142)
(NOC-AE-09002384)
- 5. Letter from G. T. Powell to NRC Document Control Desk dated February 16, 2010, "Nine Month Supplemental Response to Generic Letter 2008-01 ," (ML100501160)
(NOC-AE-1 0002511)
- 6. NEI APC 09-20, "Evaluation of Unexpected Voids or Gas Identified in Plant ECCS and Other Systems" from J.H. Riley, NEI, dated May 18, 2009
- 7. Letter from PWR Owners Group, Transmittal of Revision 1 of Letter Report for Gas Voids Pressure Pulsations (PA-SEE-0451) dated September 08, 2008
- 8. Letter from Westinghouse, "PWROG Position Paper on Non-condensable Gas Voids in ECCS Piping; Qualitative Engineering Judgment of Potential Effects on Reactor Coolant System Transients Including Chapter 15 Events," dated September 4, 2008