Letter Sequence Other |
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TAC:MC5720, DC Electrical Rewrite (Withdrawn, Closed) TAC:MC5721, DC Electrical Rewrite (Withdrawn, Closed) |
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MONTHYEARNOC-AE-05001913, Response to Request for Additional Information: Proposed Amendment to Technical Specification 3/4.8.2 to Modify Requirements Related to Batteries and DC Systems2005-10-17017 October 2005 Response to Request for Additional Information: Proposed Amendment to Technical Specification 3/4.8.2 to Modify Requirements Related to Batteries and DC Systems Project stage: Response to RAI NOC-AE-06001964, Proposed Amendment to Technical Specification 3/4.8.2 to Modify Requirements Related to Batteries and DC Systems -- Revised2006-02-28028 February 2006 Proposed Amendment to Technical Specification 3/4.8.2 to Modify Requirements Related to Batteries and DC Systems -- Revised Project stage: Other ML0613901632006-05-25025 May 2006 Withdrawal of Request for Amendments Project stage: Withdrawal ML0621301212006-07-27027 July 2006 Withdrawal of Request for Amendment Project stage: Withdrawal NOC-AE-07002141, Resolution of Issues Regarding Proposed Amendment to Technical Specification 3/4.8.2 to Modify Requirements Related to Batteries and DC Systems2007-04-0606 April 2007 Resolution of Issues Regarding Proposed Amendment to Technical Specification 3/4.8.2 to Modify Requirements Related to Batteries and DC Systems Project stage: Other NOC-AE-07002167, Amended Changes to Technical Specification 3/4.8.2 for Batteries and DC Systems2007-05-31031 May 2007 Amended Changes to Technical Specification 3/4.8.2 for Batteries and DC Systems Project stage: Other NOC-AE-07002183, Updated Pages to Incorporate Battery-Related Technical Specification Changes2007-07-17017 July 2007 Updated Pages to Incorporate Battery-Related Technical Specification Changes Project stage: Other ML0720103122007-07-17017 July 2007 Project, Units 1 and 2 - Attachment to 7/18/07 E-Mail to M. Thadani, Nrr/Dorl/Lpliv, from P. Walker, STPNOC - Letter and Updated Technical Specification Pages - Battery Monitoring License Amendment Request (TAC MD0333, MD0334) Project stage: Other ML0720102982007-07-18018 July 2007 7/18/07 E-mail to M. Thadani, Nrr/Dorl/Lpliv, from Phillip Walker, Stpnotc Re Battery Technical Specification Pages for License Amendment Request Project stage: Request 2006-07-27
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Category:Letter type:NOC
MONTHYEARNOC-AE-240040, Application for Order Consenting to Direct Transfer of Licenses2024-07-31031 July 2024 Application for Order Consenting to Direct Transfer of Licenses NOC-AE-240040, Operator Licensinq Examination Schedule Revision 32024-05-15015 May 2024 Operator Licensinq Examination Schedule Revision 3 NOC-AE-240040, Relief Request Number RR-ENG-4-07 – Request for an Alternative to ASME Code Case N-729-6 for Reactor Vessel Head Penetration 752024-04-0606 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 NOC-AE-240040, Financial Assurance for Decommissioning - 2024 Update2024-03-28028 March 2024 Financial Assurance for Decommissioning - 2024 Update 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-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-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 2024-07-31
[Table view] Category:Technical Specification
MONTHYEARML23177A2522023-06-26026 June 2023 Units 1, 2 & Independent Spent Fuel Storage Installation - Biennial Submittal of Technical Specification Bases Changes, Commitment Changes, 10 CFR 50.59 Evaluation Summary, and 10 CFR 72.48 Evaluation Summary ML23089A2042023-03-30030 March 2023 License Amendment Request to Revise Alternative Source Term Dose Calculation ML22244A2322022-09-0101 September 2022 Supplement to Application to Revise Technical Specifications to Adopt TSTF-554, Revise Reactor Coolant Leakage Requirements ML22221A2122022-08-0909 August 2022 Application to Revise Technical Specifications to Adopt TSTF-554, Revise Reactor Coolant Leakage Requirements ML21175A3252021-06-24024 June 2021 Technical Specification Bases Control Program NOC-AE-21003814, Technical Specification Bases Control Program2021-06-24024 June 2021 Technical Specification Bases Control Program ML20212L5212020-07-30030 July 2020 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 Improvement Process ML20134K7582020-05-13013 May 2020 License Amendment Request Under Exigent Circumstances for One-Time Revision to Technical Specification 3.5.1 to Reduce Minimum Allowed Accumulator Pressures NOC-AE-20003734, License Amendment Request Under Exigent Circumstances for One-Time Revision to Technical Specification 3.5.1 to Reduce Minimum Allowed Accumulator Pressures2020-05-13013 May 2020 License Amendment Request Under Exigent Circumstances for One-Time Revision to Technical Specification 3.5.1 to Reduce Minimum Allowed Accumulator Pressures NOC-AE-19003677, License Amendment Request to Revise Technical Specifications to Adopt TSTF-490, Revision 0, Deletion of E Bar Definition and Revision to RCS Specific Activity Tech Spec.2019-09-26026 September 2019 License Amendment Request to Revise Technical Specifications to Adopt TSTF-490, Revision 0, Deletion of E Bar Definition and Revision to RCS Specific Activity Tech Spec. NOC-AE-19003670, Technical Specification Bases Control Program2019-06-19019 June 2019 Technical Specification Bases Control Program NOC-AE-19003617, License Amendment Request to Revise Technical Specifications Tables for a Terminology Change to the P-13 Permissive Interlock Description2019-04-24024 April 2019 License Amendment Request to Revise Technical Specifications Tables for a Terminology Change to the P-13 Permissive Interlock Description NOC-AE-15003272, Technical Specification Bases Control Program2015-07-0202 July 2015 Technical Specification Bases Control Program NOC-AE-14003115, Correction of Technical Specification Typographical Error Incurred During Prior License Amendment Nos. 188 and 1752014-03-27027 March 2014 Correction of Technical Specification Typographical Error Incurred During Prior License Amendment Nos. 188 and 175 NOC-AE-13003011, Report of Changes Made to the Technical Specification Bases Covering the Period from June 16, 2011 to June 16, 20132013-06-17017 June 2013 Report of Changes Made to the Technical Specification Bases Covering the Period from June 16, 2011 to June 16, 2013 NOC-AE-10002554, Technical Specification Bases Control Program (Section 6.8.3.m)2010-04-29029 April 2010 Technical Specification Bases Control Program (Section 6.8.3.m) NOC-AE-09002400, Technical Specification Bases Control Program2009-03-16016 March 2009 Technical Specification Bases Control Program ML0836400802009-01-30030 January 2009 Issuance of Amendment Nos. 190 and 178, Revision to Technical Specification 3.6.1.3, Containment Air Locks NOC-AE-08002319, Response to RAI Revision to Proposed Amendment to TS 3.3.1 Required Action for Inoperable Extended Range Neutron Flux Instrumentation and Technical Specification 3.4.1.4.2 Action C2008-07-28028 July 2008 Response to RAI Revision to Proposed Amendment to TS 3.3.1 Required Action for Inoperable Extended Range Neutron Flux Instrumentation and Technical Specification 3.4.1.4.2 Action C NOC-AE-08002255, Transmittal of Proposed Amendment to Technical Specification 3.8.3.12008-03-0606 March 2008 Transmittal of Proposed Amendment to Technical Specification 3.8.3.1 NOC-AE-07002234, Proposed Amendment to Technical Specification 3.3.1 Required Action for Inoperable Extended Range Neutron Flux Instrumentation and Technical Specification 3.4.1.4.2 Action C2008-01-28028 January 2008 Proposed Amendment to Technical Specification 3.3.1 Required Action for Inoperable Extended Range Neutron Flux Instrumentation and Technical Specification 3.4.1.4.2 Action C NOC-AE-07002228, License Amendment Request Proposed Revision to Technical Specification 3.6.1.3, Containment Air Locks2008-01-23023 January 2008 License Amendment Request Proposed Revision to Technical Specification 3.6.1.3, Containment Air Locks ML0734503832007-12-0505 December 2007 Technical Specification Bases Control Program ML0730503482007-10-23023 October 2007 License Amendment Request, Proposed Revision to Technical Specifications to Relocate Surveillance Test Intervals to a Licensee-Controlled Program (Risk-Informed Initiative 5b) NOC-AE-07002167, Amended Changes to Technical Specification 3/4.8.2 for Batteries and DC Systems2007-05-31031 May 2007 Amended Changes to Technical Specification 3/4.8.2 for Batteries and DC Systems NOC-AE-07002156, Proposed Change to Surveillance Requirement 4.5.2.d2007-05-21021 May 2007 Proposed Change to Surveillance Requirement 4.5.2.d ML0701201552007-01-11011 January 2007 License Pages 4 & TS 3/4 3-27 - Issuance of Amendment 176 One-Time Change to Loss of Power Instrumentation Technical Specifications NOC-AE-06002101, Proposed One-Time Exigent Change to Loss of Power Instrumentation Technical Specifications2006-12-28028 December 2006 Proposed One-Time Exigent Change to Loss of Power Instrumentation Technical Specifications NOC-AE-06002096, Proposed One-Time Exigent Change to Loss of Power Instrumentation Technical Specifications2006-12-20020 December 2006 Proposed One-Time Exigent Change to Loss of Power Instrumentation Technical Specifications NOC-AE-06002013, License Amendment Request - Proposed Amendment to Technical Specifications: Revision of the Spent Fuel Pool and In-Containment Storage Area Criticality Analysis2006-06-0707 June 2006 License Amendment Request - Proposed Amendment to Technical Specifications: Revision of the Spent Fuel Pool and In-Containment Storage Area Criticality Analysis NOC-AE-05001914, Proposed Change to Technical Specification 3.3.3.6, Accident Monitoring Instrumentation.2006-03-30030 March 2006 Proposed Change to Technical Specification 3.3.3.6, Accident Monitoring Instrumentation. NOC-AE-06001964, Proposed Amendment to Technical Specification 3/4.8.2 to Modify Requirements Related to Batteries and DC Systems -- Revised2006-02-28028 February 2006 Proposed Amendment to Technical Specification 3/4.8.2 to Modify Requirements Related to Batteries and DC Systems -- Revised ML0514407962005-05-19019 May 2005 Tech.Spec.Pages to S.Texas Amendment Nos. 172/160 NOC-AE-05001847, Technical Specification Bases Change2005-02-15015 February 2005 Technical Specification Bases Change NOC-AE-05001834, License Amendment Request Proposed One-Time Change to Technical Specification 3.7.4, Essential Cooling Water System, and Associated Supported Systems Limiting Condition for Operation Action Statement2005-01-0606 January 2005 License Amendment Request Proposed One-Time Change to Technical Specification 3.7.4, Essential Cooling Water System, and Associated Supported Systems Limiting Condition for Operation Action Statement NOC-AE-04001794, License Amendment Request Revision to Proposed Amendment to Technical Specifications for Steam Generators2004-10-0505 October 2004 License Amendment Request Revision to Proposed Amendment to Technical Specifications for Steam Generators NOC-AE-04001786, License Amendment Request to Eliminate the Requirements to Provide Monthly Operating Reports and Occupational Radiation Exposure Reports2004-09-30030 September 2004 License Amendment Request to Eliminate the Requirements to Provide Monthly Operating Reports and Occupational Radiation Exposure Reports NOC-AE-04001795, Units I and 2 - Proposed Change to Technical Specification Surveillance Requirement 4.4.4.2, Reactor Coolant System Relief Valves.2004-09-30030 September 2004 Units I and 2 - Proposed Change to Technical Specification Surveillance Requirement 4.4.4.2, Reactor Coolant System Relief Valves. NOC-AE-04001780, License Amendment Request Proposed Revision to the Technical Specifications Regarding Deletion of Requirements Related to Hydrogen Recombiners and Hydrogen Analyzers Using the Consolidated Line Item Improvement Process2004-08-26026 August 2004 License Amendment Request Proposed Revision to the Technical Specifications Regarding Deletion of Requirements Related to Hydrogen Recombiners and Hydrogen Analyzers Using the Consolidated Line Item Improvement Process NOC-AE-04001697, Proposed Exigent Change to Technical Specification 3/4.7.72004-03-18018 March 2004 Proposed Exigent Change to Technical Specification 3/4.7.7 NOC-AE-04001668, License Amendment Request, Proposed Revision to Technical Specifications Regarding Mode Change Using the Consolidated Line Item Improvement Process2004-02-0303 February 2004 License Amendment Request, Proposed Revision to Technical Specifications Regarding Mode Change Using the Consolidated Line Item Improvement Process NOC-AE-03001660, Supplement 2 to Proposed Emergency Change to Technical Specification 3.8.1.1, Note 122003-12-28028 December 2003 Supplement 2 to Proposed Emergency Change to Technical Specification 3.8.1.1, Note 12 NOC-AE-03001657, Proposed Emergency Change to Technical Specification 3.8.1.1, Note 122003-12-27027 December 2003 Proposed Emergency Change to Technical Specification 3.8.1.1, Note 12 NOC-AE-03001647, Proposed Emergency Change to Technical Specification 3.8.1.1 Re Allowed Outage Time for Unit 2 Standby Diesel Generator 22 from 14 Days to 61 Days2003-12-15015 December 2003 Proposed Emergency Change to Technical Specification 3.8.1.1 Re Allowed Outage Time for Unit 2 Standby Diesel Generator 22 from 14 Days to 61 Days ML0330904832003-10-31031 October 2003 Technical Specification for Amendment 157 NOC-AE-03001580, License Amendment Request - Proposed Amendment to Technical Specification 4.4.5.3a2003-10-16016 October 2003 License Amendment Request - Proposed Amendment to Technical Specification 4.4.5.3a NOC-AE-03001522, TS Bases Changes2003-05-0505 May 2003 TS Bases Changes NOC-AE-03001502, Administrative Revision to Proposed Change to Radiation Monitoring Technical Specifications2003-03-27027 March 2003 Administrative Revision to Proposed Change to Radiation Monitoring Technical Specifications ML0233900782002-11-26026 November 2002 Technical Specifications Pages for Amendmentds 144 & 132 End of Life (Eol) Moderator Temperature Coefficient (Mtc) Surveillance Requirements ML0234005242002-11-26026 November 2002 Technical Specifications Pages for Amendmentds 144 & 132 End of Life (Eol) Moderator Temperature Coefficient (Mtc) Surveillance Requirements 2023-06-26
[Table view] Category:Amendment
MONTHYEARML22244A2322022-09-0101 September 2022 Supplement to Application to Revise Technical Specifications to Adopt TSTF-554, Revise Reactor Coolant Leakage Requirements ML22221A2122022-08-0909 August 2022 Application to Revise Technical Specifications to Adopt TSTF-554, Revise Reactor Coolant Leakage Requirements ML20212L5212020-07-30030 July 2020 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 Improvement Process NOC-AE-20003734, License Amendment Request Under Exigent Circumstances for One-Time Revision to Technical Specification 3.5.1 to Reduce Minimum Allowed Accumulator Pressures2020-05-13013 May 2020 License Amendment Request Under Exigent Circumstances for One-Time Revision to Technical Specification 3.5.1 to Reduce Minimum Allowed Accumulator Pressures ML20134K7582020-05-13013 May 2020 License Amendment Request Under Exigent Circumstances for One-Time Revision to Technical Specification 3.5.1 to Reduce Minimum Allowed Accumulator Pressures NOC-AE-19003677, License Amendment Request to Revise Technical Specifications to Adopt TSTF-490, Revision 0, Deletion of E Bar Definition and Revision to RCS Specific Activity Tech Spec.2019-09-26026 September 2019 License Amendment Request to Revise Technical Specifications to Adopt TSTF-490, Revision 0, Deletion of E Bar Definition and Revision to RCS Specific Activity Tech Spec. NOC-AE-19003617, License Amendment Request to Revise Technical Specifications Tables for a Terminology Change to the P-13 Permissive Interlock Description2019-04-24024 April 2019 License Amendment Request to Revise Technical Specifications Tables for a Terminology Change to the P-13 Permissive Interlock Description ML0836400802009-01-30030 January 2009 Issuance of Amendment Nos. 190 and 178, Revision to Technical Specification 3.6.1.3, Containment Air Locks NOC-AE-08002255, Transmittal of Proposed Amendment to Technical Specification 3.8.3.12008-03-0606 March 2008 Transmittal of Proposed Amendment to Technical Specification 3.8.3.1 NOC-AE-07002234, Proposed Amendment to Technical Specification 3.3.1 Required Action for Inoperable Extended Range Neutron Flux Instrumentation and Technical Specification 3.4.1.4.2 Action C2008-01-28028 January 2008 Proposed Amendment to Technical Specification 3.3.1 Required Action for Inoperable Extended Range Neutron Flux Instrumentation and Technical Specification 3.4.1.4.2 Action C NOC-AE-07002228, License Amendment Request Proposed Revision to Technical Specification 3.6.1.3, Containment Air Locks2008-01-23023 January 2008 License Amendment Request Proposed Revision to Technical Specification 3.6.1.3, Containment Air Locks ML0730503482007-10-23023 October 2007 License Amendment Request, Proposed Revision to Technical Specifications to Relocate Surveillance Test Intervals to a Licensee-Controlled Program (Risk-Informed Initiative 5b) NOC-AE-07002167, Amended Changes to Technical Specification 3/4.8.2 for Batteries and DC Systems2007-05-31031 May 2007 Amended Changes to Technical Specification 3/4.8.2 for Batteries and DC Systems NOC-AE-07002156, Proposed Change to Surveillance Requirement 4.5.2.d2007-05-21021 May 2007 Proposed Change to Surveillance Requirement 4.5.2.d ML0701201552007-01-11011 January 2007 License Pages 4 & TS 3/4 3-27 - Issuance of Amendment 176 One-Time Change to Loss of Power Instrumentation Technical Specifications NOC-AE-06002101, Proposed One-Time Exigent Change to Loss of Power Instrumentation Technical Specifications2006-12-28028 December 2006 Proposed One-Time Exigent Change to Loss of Power Instrumentation Technical Specifications NOC-AE-06002096, Proposed One-Time Exigent Change to Loss of Power Instrumentation Technical Specifications2006-12-20020 December 2006 Proposed One-Time Exigent Change to Loss of Power Instrumentation Technical Specifications NOC-AE-06002013, License Amendment Request - Proposed Amendment to Technical Specifications: Revision of the Spent Fuel Pool and In-Containment Storage Area Criticality Analysis2006-06-0707 June 2006 License Amendment Request - Proposed Amendment to Technical Specifications: Revision of the Spent Fuel Pool and In-Containment Storage Area Criticality Analysis NOC-AE-05001914, Proposed Change to Technical Specification 3.3.3.6, Accident Monitoring Instrumentation.2006-03-30030 March 2006 Proposed Change to Technical Specification 3.3.3.6, Accident Monitoring Instrumentation. ML0514407962005-05-19019 May 2005 Tech.Spec.Pages to S.Texas Amendment Nos. 172/160 NOC-AE-05001834, License Amendment Request Proposed One-Time Change to Technical Specification 3.7.4, Essential Cooling Water System, and Associated Supported Systems Limiting Condition for Operation Action Statement2005-01-0606 January 2005 License Amendment Request Proposed One-Time Change to Technical Specification 3.7.4, Essential Cooling Water System, and Associated Supported Systems Limiting Condition for Operation Action Statement NOC-AE-04001794, License Amendment Request Revision to Proposed Amendment to Technical Specifications for Steam Generators2004-10-0505 October 2004 License Amendment Request Revision to Proposed Amendment to Technical Specifications for Steam Generators NOC-AE-04001795, Units I and 2 - Proposed Change to Technical Specification Surveillance Requirement 4.4.4.2, Reactor Coolant System Relief Valves.2004-09-30030 September 2004 Units I and 2 - Proposed Change to Technical Specification Surveillance Requirement 4.4.4.2, Reactor Coolant System Relief Valves. NOC-AE-04001786, License Amendment Request to Eliminate the Requirements to Provide Monthly Operating Reports and Occupational Radiation Exposure Reports2004-09-30030 September 2004 License Amendment Request to Eliminate the Requirements to Provide Monthly Operating Reports and Occupational Radiation Exposure Reports NOC-AE-04001780, License Amendment Request Proposed Revision to the Technical Specifications Regarding Deletion of Requirements Related to Hydrogen Recombiners and Hydrogen Analyzers Using the Consolidated Line Item Improvement Process2004-08-26026 August 2004 License Amendment Request Proposed Revision to the Technical Specifications Regarding Deletion of Requirements Related to Hydrogen Recombiners and Hydrogen Analyzers Using the Consolidated Line Item Improvement Process NOC-AE-04001697, Proposed Exigent Change to Technical Specification 3/4.7.72004-03-18018 March 2004 Proposed Exigent Change to Technical Specification 3/4.7.7 NOC-AE-04001668, License Amendment Request, Proposed Revision to Technical Specifications Regarding Mode Change Using the Consolidated Line Item Improvement Process2004-02-0303 February 2004 License Amendment Request, Proposed Revision to Technical Specifications Regarding Mode Change Using the Consolidated Line Item Improvement Process NOC-AE-03001647, Proposed Emergency Change to Technical Specification 3.8.1.1 Re Allowed Outage Time for Unit 2 Standby Diesel Generator 22 from 14 Days to 61 Days2003-12-15015 December 2003 Proposed Emergency Change to Technical Specification 3.8.1.1 Re Allowed Outage Time for Unit 2 Standby Diesel Generator 22 from 14 Days to 61 Days ML0330904832003-10-31031 October 2003 Technical Specification for Amendment 157 NOC-AE-03001580, License Amendment Request - Proposed Amendment to Technical Specification 4.4.5.3a2003-10-16016 October 2003 License Amendment Request - Proposed Amendment to Technical Specification 4.4.5.3a ML0234005242002-11-26026 November 2002 Technical Specifications Pages for Amendmentds 144 & 132 End of Life (Eol) Moderator Temperature Coefficient (Mtc) Surveillance Requirements ML0233900782002-11-26026 November 2002 Technical Specifications Pages for Amendmentds 144 & 132 End of Life (Eol) Moderator Temperature Coefficient (Mtc) Surveillance Requirements NOC-AE-02001402, Response to NRC Questions on Proposed Change to Loss of Power & AC Sources TS2002-10-24024 October 2002 Response to NRC Questions on Proposed Change to Loss of Power & AC Sources TS NOC-AE-02001272, Application for Amendment to Several Sections of TS & Unit 2 Operating License to Delete Information Specific to Model E Steam Generators2002-05-23023 May 2002 Application for Amendment to Several Sections of TS & Unit 2 Operating License to Delete Information Specific to Model E Steam Generators NOC-AE-02001237, Proposed Amendment to Technical Specification 3/4.6.1.7, Containment Ventilation System2002-02-18018 February 2002 Proposed Amendment to Technical Specification 3/4.6.1.7, Containment Ventilation System ML0201605202002-01-10010 January 2002 STP, Units 1 and 2 - TS for Amendments No. 135 and 124 2022-09-01
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Text
Nuclear Operating Company.
South Tezs Pro/ed Ekdrkc GeneraltngStation PO Box28A Wadsworth, Texas 77483 /AA*--
May 31, 2007 NOC-AE-07002167 File No.: G25 10CFR50.90 U. S. Nuclear Regulatory Commission Attention: Document Control Desk One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738 South Texas Project Units 1 and 2 Docket Nos. STN 50-498, STN 50-499 Amended Changes to Technical Specification 3/4.8.2 for Batteries and DC Systems (TAC Nos. MC5720 and MC5721)
Reference:
Letter, David W. Rencurrel to Document Control Desk, "Resolution of Issues Regarding Proposed Amendment to Technical Specification 3/4.8.2 to Modify Requirements Related to Batteries and DC Systems (TAC Nos. MC5720 and MC5721 )," dated April 6, 2007 Pursuant to 10 CFR 50.90, the STP Nuclear Operating Company (STPNOC) requested Nuclear Regulatory Commission approval of an amendment to Unit 1 Operating License NPF-76 and Unit 2 Operating License NPF-80. The request proposed changes to Technical Specification 3/4.8.2.1, "DC Sources - Operating," and 3/4.8.2.2, "DC Sources - Shutdown," with addition of a new Technical Specification 3/4.8.2.3,"Battery Parameters." In telephone discussions with the NRC staff reviewer, specific areas were identified that need clarification. The subject subsections from the most recent submittal (referenced above) are to be replaced with the attached pages.
With one exception, there are no changes to the content of the Technical Specifications as a result of this submittal. The exception is a reduction in the amount of time (from 7 days to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />) from that originally proposed for restoring a battery charger to operability when no chargers in a power train are operable. This affects Technical Specifications 3.8.2.1 .b.3 and 3.8.2.2.b.3.
There are no new commitments in this letter.
If there are any questions, please contact either Mr. P. L. Walker at 361-972-8392 or me at 361-972-7861.
I state under penalty of perjury that the foregoing is true and correct.
Executed on _____.
David. Rencurrel Vice President, Engineering & Strategic Projects PLW Attachments: Clarification of Proposed Changes to Technical Specification 3/4.8.2 (Batteries and DC Systems)
STI: 32164209
NOC-AE-07002167 Page 2 of 2 cc:
(paper copy) (electronic copy)
Regional Administrator, Region IV A. H. Gutterman, Esquire U. S. Nuclear Regulatory Commission Morgan, Lewis & Bockius LLP 611 Ryan Plaza Drive, Suite 400 Arlington, Texas 76011-8064 Mohan C. Thadani U. S. Nuclear Regulatory Commission Richard A. Ratliff Thad Hill Bureau of Radiation Control Steve Winn Texas Department of State Health Services Harry Holloway 1100 West 49th Street Eddy Daniels Austin, TX 78756-3189 Marty Ryan NRG South Texas LP Senior Resident Inspector J. J. Nesrsta U. S. Nuclear Regulatory Commission R. K. Temple P. O. Box 289, Mail Code: MN116 E. Alarcon Wadsworth, TX 77483 Kevin Polio City Public Service C. M. Canady Jon C. Wood City of Austin Cox Smith Matthews Electric Utility Department
'721 Barton Springs Road C. Kirksey Austin, TX 78704 City of Austin
Attachment NOC-AE-07002167 Page 1 of 10 SOUTH TEXAS PROJECT CLARIFICATION OF PROPOSED CHANGES TO TECHNICAL SPECIFICATION 3/4.8.2 (BATTERIES AND DC SYSTEMS)
- 1. Provide justification for the time to restore a battery charger in a DC electrical power subsystem to operable status (TS Action 3.8.2.1 .b.3).
Section 4.1.1 LCO Action 3.8.2.1.b.3 provides 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> for a required battery charger in one DC electrical power subsystem to be restored to operable status compared to two hours as currently required. This is revised from the originally proposed seven days for restoration. (This change also applies to LCO Action 3.8.2.2.b.3.)
During normal operation, the 125-VDC loads are powered from the battery chargers with the batteries floating on the system. Each battery is supported by two 100% capacity chargers. In the event all off-site AC sources are lost, AC power is supplied to the battery chargers by the standby diesel generators. In case of a loss of normal power to the battery charger, the DC load is automatically powered from the station batteries. Batteries supply emergency power required for plant protection and control without interruption when the power from AC sources is interrupted. The batteries are sized to carry their connected ESF loads in the event of loss of AC power for two hours without power flow from the chargers.
Each of the three safety-related power trains is backed up with its own onsite diesel generator, and any one of the three can provide sufficient power to safely shutdown its associated reactor and remove the reactor's decay heat for risk-significant core damage frequency sequences identified in the plant-specific probability safety assessment. Furthermore, any one of the three standby diesel generators per unit can be designated as the alternate AC power source. As currently stated in STP Technical Specification 3.8.1.1, Action b, an inoperable standby diesel generator is to be restored to operability within 14 days or the unit is to be in hot shutdown within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in cold shutdown within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. This timing is the result of a Technical Specification change approved by the NRC in license amendments 85 and 72 (Units 1 and 2, respectively).
Proposed Actions 3.8.2.1 .b.1 and 3.8.2.2.b.1 would provide assurance that a battery discharge is terminated by requiring that the battery terminal voltage be restored to greater than or equal to the minimum established float voltage in two hours. This allows time to return an inoperable charger to operable status or to reestablish an alternate means of restoring battery terminal voltage to greater than or equal to the minimum established float voltage. The proposed actions will provide assurance that the battery is restored to the fully charged condition within two hours following any discharge that might have occurred due to an inoperable battery charger.
Proposed Actions 3.8.2.1.b.2 and 3.8.2.2.b.1 would require verification once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> that the battery float current does not exceed 2 amps to confirm that the battery has been fully charged. If the battery float current exceeds two amps, there may be additional problems and the battery must be declared inoperable. Verification provides assurance that the battery has sufficient capacity to perform its safety function.
Presuming that (1) the DC bus remains energized, (2) the battery terminal voltage is maintained, (3) the battery is fully charged, and (4) fully capable auxiliary battery chargers (two chargers per battery) with diesel generator support are available, there is reasonable basis for extending the allowed restoration time for a required inoperable battery charger beyond the 2-hour limit to the proposed 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> (LCO Actions 3.8.2.1 .b.3 and 3.8.2.2.b.3).
Attachment NOC-AE-07002167 Page 2 of 10 NO SIGNIFICANT HAZARDS CONSIDERATION DETERMINATION Pursuant to 10CFR50.91, this analysis provides a determination that the proposed changes to the Technical Specifications do not involve any significant hazards consideration as defined in 10CFR50.92, as described below:'
The proposed change does not involve a significant increase in the probability or consequences of an accident previously evaluated.
The proposed change rearranges the Technical Specifications for the direct current electrical power system, and adds new Conditions and required actions with revised completion times to allow for battery charger inoperability. Neither the direct current electrical power subsystem nor associated battery chargers are initiators of an accident sequence previously evaluated. Performance of plant operational activities in accordance with the proposed Technical Specification changes ensures that the direct current electrical power subsystem is capable of performing its function as previously described, even with a restoration time of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. Therefore, the mitigating functions supported by the subject subsystem will continue to provide the protection assumed by the safety analysis.
Therefore, the proposed change does not involve a significant increase in the probability or consequences of an accident previously evaluated.
" The proposed change does not create the possibility of a new or different kind of accident from any previously evaluated.
The proposed change does not involve any physical alteration of the units. No new equipment is introduced, and installed equipment is not operated in a new or different manner. The proposed changes do not affect setpoints for initiation of protective or mitigating actions.
ýOperability of the DC electrical power subsystems in accordance with the proposed technical specifications is consistent with the initial assumptions of the accident analyses and is based upon meeting the design basis of the plant.
The proposed changes will not alter the manner in which equipment operation is initiated, nor will the functional demands on credited equipment be changed. No alteration in the operating procedures is proposed, and no change is being made to procedures relied upon in response to an off-normal event. No new failure modes are being introduced, and the proposed change does not alter assumptions made in the safety analyses.
Therefore, the proposed change does not create the possibility of a new or different accident from any accident previously evaluated.
- The proposed change does not involve a significant reduction in the margin of safety.
The proposed change will not adversely affect operation of plant equipment and will not result in a change to the setpoints at which protective actions are initiated. Sufficient DC capacity to support operation of mitigation equipment is ensured, even with a restoration time of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. The provisions of the Battery Monitoring and Maintenance Program will ensure that the station batteries are maintained in a highly reliable manner.
The equipment fed by the DC electrical system will continue to provide adequate power to safety-related loads in accordance with analysis assumptions.
Therefore, the proposed change does not involve a significant reduction in a margin of safety.
Attachment NOC-AE-07002167 Page 3 of 10 Based on the evaluation provided above, STPNOC concludes that the proposed change does not involve a significant hazards consideration and will not have a significant effect on safe operation of the plant. Therefore, there is reasonable assurance that operation of the South Texas Project in accordance with the proposed revision to the Technical Specifications will not endanger the public health and safety.
ANALYSIS The design of the South Texas Project Class 1 E 125-vdc electrical power systems is in accordance with the requirements of GDC 17, NRC Regulatory Guide 1.6, and IEEE-308.
Redundant power supplies and equipment satisfy GDC 17 for a single failure.
The overall system design, including functional requirements, redundancy, capacity, and availability is in conformance with IEEE-308 criteria for Class 1 E systems with the exception of intervals for battery performance discharge tests, which are in accordance with IEEE 450. The battery charger supply capacity is in accordance with Regulatory Guide 1.32.
Periodic inspection and testing of the DC systems are performed to monitor the condition of the equipment to ensure reliable operation. Visual inspections, electrolyte level, specific gravity, and cell voltage checks, and performance discharge tests are performed at regular intervals on each battery. Maintenance and testing procedures and criteria for replacement are in accordance with IEEE 450. Visual checks and performance tests are also scheduled for the battery chargers.
The proposed changes to the DC electrical power system specifications are consistent with the applicable regulatory requirements. Full charger operability based on the margin afforded in the design capacity of the battery charger continues to be required. Verification that the batteries are maintained within the established limitations ensures that the batteries have sufficient capacity to perform the required duty cycle.
Based upon the considerations discussed above:
- There is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner;
- Such activities will be conducted in compliance with the Commission's regulations; and
" Issuance of the amendment will not be inimical to the common defense and security or to the health and safety of the public.
ENVIRONMENTAL CONSIDERATION 10 CFR 51.22(b) specifies the criteria for categorical exclusion from the requirements for a specific environmental assessment per 10 CFR 51.21. STPNOC has evaluated the proposed amendment and determined that:
" The proposed amendment does not involve a significant hazards consideration.
As demonstrated in the No Significant Hazards Consideration Determination, the requested license amendment does not involve any significant hazards consideration.
- There is no significant change in the types or significant increase in the amounts of any effluent that may be released offsite.
The proposed amendment involves no change to the facility and does not involve any change in the manner of operation of any plant systems involving the generation, collection or processing of radioactive materials or other types of effluents. Therefore, no increase in the amounts of effluents or new types of effluents would be created.
Attachment NOC-AE-07002167 Page 4 of 10
- There is no significant increase in individual or cumulative occupational radiation exposure.
The requested license amendment involves no change to the facility and will not increase the radiation dose resulting from the operation of any plant system. Furthermore, implementation of this proposed change will not involve work activities that could contribute to occupational radiation exposure. Therefore, there will be no increase in individual or cumulative occupational radiation exposure associated with this proposed change.
Accordingly, the proposed amendment meets the eligibility criteria for categorical exclusion set forth in 10 CFR 51.22(c)(9). Therefore, pursuant to 10 CFR 51.22(b), no environmental impact statement or environmental assessment is required to be prepared in connection with these proposed changes.
Attachment NOC-AE-07002167 Page 5 of 10 ELECTRICAL POWER SYSTEMS 3/4.8.2 DC SOURCES OPERATING LIMITING CONDITION FOR OPERATION 3.8.2.1 As a minimum, the following DC electrical sources shall be OPERABLE:
- a. Channel I 125-volt Battery Bank ElAl 1 (Unit 1), E2A1 1 (Unit 2) and one of its two associated chargers,
- b. Channel 11 125-volt Battery Bank El D11 (Unit 1), E2D1 1 (Unit 2) and one of its two associated full capacity chargers,
- c. Channel III 125-volt Battery Bank El B131 (Unit 1), E2B1 1 (Unit 2) and one of its two associated full capacity chargers, and
- d. Channel IV 125-volt Battery Bank El C11 (Unit 1), E2C1 1 (Unit 2) and one of its two associated chargers.
APPLICABILITY: MODES 1, 2, 3, and 4.
ACTION:
- a. With one of the required battery banks inoperable, restore the inoperable battery bank to OPERABLE status within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
- b. With no battery chargers for a channel OPERABLE,
- 1. Restore battery terminal voltage to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, AND
- 2. Verify float current for the affected battery does not exceed 2 amps once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, AND
- 3. Restore one battery charger to OPERABLE status within 2 houhrs.
If the battery terminal voltage cannot be restored in the allowed time, float current is excessive, or a battery charger is not restored to operability in the time allowed, the affected reactor unit is to be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
- c. With one of the required channels inoperable for reasons other than (a) or (b) above, restore the channel to OPERABLE status within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
SOUTH TEXAS - UNITS 1 & 2 3/4 8-10 Unit 1 - Amendment No.-4--,-,-
Unit 2 - Amendment No. 62
Attachment NOC-AE-07002167 Page 6 of 10 ELECTRICAL POWER SYSTEMS DC SOURCES SHUTDOWN LIMITING CONDITION FOR OPERATION 3.8.2.2 DC electrical power subsystem shall be OPERABLE to support the DC electrical power distribution subsystem(s) required by LCO 3.8.3.2, "Onsite Power Distribution -
Shutdown."
APPLICABILITY: MODES 5 and 6 ACTION:
- a. With one or more required DC electrical power subsystems inoperable:
- 1. Immediately declare affected required feature(s) inoperable OR
- 2. Immediately:
- Initiate action to suspend operation with a potential for draining the reactor vessel, AND
- Suspend all operations involving CORE ALTERATIONS, operations involving positive reactivity additions that could result in loss of required SHUTDOWN MARGIN or required boron concentration, or movement of irradiated fuel, AND 0 Initiate corrective action to restore the required DC electrical power subsystems to OPERABLE status as soon as possible.
- b. With no battery chargers for a required channel OPERABLE:
- 1. Restore battery terminal voltage to greater than or equal to the minimum established float voltage within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, AND
- 2. Verify float current for the affected battery does not exceed 2 amps once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, AND
- 3. Restore one battery charger to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
If the battery terminal voltage cannot be restored within the allowed time, float current is excessive, or a battery charger is not restored to operability in the time allowed:
- Initiate action to suspend operation with a potential for draining the reactor vessel, AND SOUTH TEXAS - UNITS 1 & 2 3/4 8-13 Unit 1 - Amendment No. 4, 7-1, 128 Unit 2 - Amendment No. 69-,
Attachment NOC-AE-07002167 Page 7 of 10
- 2. Provide basis for actions in response to reduced pilot cell electrolyte temperature (Technical Specification 3.8.2.3.d).
Section 4.1.1 STPNOC proposes to add new Technical Specification 3.8.2.3.d which applies to a battery found with a pilot cell electrolyte temperature less than the minimum established design limit. A low electrolyte temperature limits the current and power available from the battery. However, design margin will enable a battery whose capacity has been downgraded to have sufficient capacity to perform the intended functions. Therefore, low pilot cell electrolyte temperature does not require that a battery be considered inoperable.
The minimum design temperature for the STP Class 1 E batteries is 650 F. The appropriate margin for this temperature was used during battery sizing in accordance with IEEE 485. The STP battery rooms are maintained at a temperature above 70 0 F. Battery room temperatures are verified once per day as being above this level. Since batteries have very large thermal inertia, a low room temperature is expected to be corrected prior to the battery reaching its minimum operating temperature.
In addition to the temperature margin, an aging margin of 25% is used in sizing. The minimum available remaining design margin for any battery is 29.6% for Train A. 5% of this margin is reserved for the use of the 2 amp return-to-service limit. The remaining margin is more than sufficient to allow for temperature variation below the 65*F minimum used in sizing. Quarterly historical data show that the STP minimum/maximum temperature deviation is well within a 5 degree Fahrenheit variance. Therefore, use of pilot cell electrolyte temperature in lieu of average battery electrolyte temperature is bounded by the STP design and is acceptable.
Attachment NOC-AE-07002167 Page 8 of 10 Provide basis for battery design margin (surveillance requirement 4.8.2.1).
Section 4.1.4 This change replaces the current requirements for battery specific gravity monitoring in Table 4.8-2, "Battery Surveillance Requirements," with surveillance requirements utilizing a suitable operability limit based on float current to ensure the battery state-of-charge is sufficient for its design duty cycle. TSTF-360 provides technical justification for using the replacement criteria.
The requirements are relocated to Technical Specification Action 3.8.2.3.b and Surveillance Requirement 4.8.2.3.a.
Float current monitoring will be used in place of specific gravity monitoring for tests performed weekly and quarterly. The battery manufacturer concurs with the use of float current monitoring for the purpose of determining the state-of-charge of the STP station batteries. More specifically, the battery manufacturer states that float current (Surveillance Requirement 4.8.2.3.a) is a reasonable parameter to use to confirm a state of full charge for the 125 V DC STP station batteries. The accuracy and capability of the float current monitoring equipment provides adequate assurance that deletion of the requirement for specific gravity measurement will not have a significant impact on safety or the ability to accurately determine the operability of the station batteries.
The rated battery charger output is 300 amps, with a load limit of 330 amps. Allowing the inverter loads to be carried by the battery (20-kva at 0.8 pf and 90% efficiency) reduces the current available to recharge the battery by 142 amps. The normal bus load of 30 amps (as determined by on-line surveillance testing) further reduces the available current of 300 amps with a net reduction of 172 amps (142 plus 30), leaving 128 amps. 5% of this value is 6.4 amps.
Applying a maximum charging current of 2 amps ensures the 5% design margin is not exceeded.
Attachment NOC-AE-07002167 Page 9 of 10 Include details provided in the Bases justifying float current monitoring in place of specific gravity monitoring (surveillance requirement 4.8.2.3).
Section 4.1.4 Application of specific gravity monitoring to determine the battery state-of-charge is replaced by float current monitoring for weekly and quarterly testing. Float charge is the condition in which the charger supplies the continuous charge required to overcome the internal losses of a battery and maintain the battery in a charged state. Float current requirements are based on the float current indicative of a charged battery. Use of float current to determine the state of charge of the battery is consistent with IEEE 450-2002.
Measuring current at a specific'voltage (typically the float voltage in normal operation) can be used to assess the level of charge. At low voltage, a current of 2 amps is appropriate for cells with 8-hour capacities of 1000 amp-hours or larger. Float current greater than 2 amps in one or more batteries indicates that a partial discharge of the battery capacity has occurred. This may be due to a temporary loss of a battery charger or possibly due to one or more battery cells in a low voltage condition reflecting some loss of capacity. However, although float current may be greater than 2 amps, the battery capacity remains sufficient for the battery to perform its intended safety function during the time allowed.
Due to the technical nature of the rationale for the change, additional details are provided in attachments to TSTF-360, Revision 1.
Attachment NOC-AE-07002167 Page 10 of 10 Provide justification for use of float current to determine the state of battery charge (surveillance requirement 4.8.2.3.a).
Section 4.1.6 New Surveillance Requirement 4.8.2.3.a will require verification every 7 days that float current for each battery is less than or equal to 2 amps, and is used to determine the state of charge of the battery. The float current requirements are based on the float current indicative of a charged battery. If battery float current is greater than 2 amps, the battery may not be fully charged.
Use of float current to determine the state of charge of the battery and the 7-day cycle for verification exceeds the requirements of IEEE 450-2002 and is in accordance with vendor authorization.