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Category:Letter type:DCL
MONTHYEARDCL-24-010, Nuclear Material Transaction Report for New Fuel2024-01-29029 January 2024 Nuclear Material Transaction Report for New Fuel DCL-24-009, Nuclear Material Transaction Report for New Fuel2024-01-17017 January 2024 Nuclear Material Transaction Report for New Fuel DCL-24-008, Schedule Considerations for Review of the DCPP License Renewal Application2024-01-17017 January 2024 Schedule Considerations for Review of the DCPP License Renewal Application DCL-24-004, Supplement to License Amendment Request 23-01 Revision to Technical Specifications to Adopt Risk-Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b2024-01-15015 January 2024 Supplement to License Amendment Request 23-01 Revision to Technical Specifications to Adopt Risk-Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b DCL-23-129, Nuclear Material Transaction Report for New Fuel2023-12-27027 December 2023 Nuclear Material Transaction Report for New Fuel DCL-23-122, Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation2023-12-14014 December 2023 Request for Exemption from Enhanced Weapons, Firearms Background Checks, and Security Event Notifications Implementation DCL-23-128, Emergency Plan Update2023-12-13013 December 2023 Emergency Plan Update DCL-23-125, Core Operating Limits Report for Unit 1 Cycle 252023-12-0606 December 2023 Core Operating Limits Report for Unit 1 Cycle 25 DCL-23-121, Supplement to License Amendment Request 23-03, Revision to Technical Specification3.7.8, Auxiliary Saltwater System2023-11-16016 November 2023 Supplement to License Amendment Request 23-03, Revision to Technical Specification3.7.8, Auxiliary Saltwater System DCL-23-120, License Amendment Request 23-03 Revision to Technical Specification 3.7.8, Auxiliary Saltwater (Asw) System2023-11-14014 November 2023 License Amendment Request 23-03 Revision to Technical Specification 3.7.8, Auxiliary Saltwater (Asw) System DCL-23-118, License Renewal Application2023-11-0707 November 2023 License Renewal Application DCL-2023-520, Discharge Self-Monitoring at Diablo Canyon Power Plant (DCPP)2023-10-19019 October 2023 Discharge Self-Monitoring at Diablo Canyon Power Plant (DCPP) DCL-23-103, Independent Spent Fuel Storage Installation - Withdrawal of License Amendment Request 22-01, Request for Approval of Alternative Security Measures for Early Warning System2023-10-13013 October 2023 Independent Spent Fuel Storage Installation - Withdrawal of License Amendment Request 22-01, Request for Approval of Alternative Security Measures for Early Warning System DCL-23-092, Material Status Report for the Period Ending August 31, 20232023-09-28028 September 2023 Material Status Report for the Period Ending August 31, 2023 DCL-23-077, License Amendment Request 23-02 Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors2023-09-27027 September 2023 License Amendment Request 23-02 Application to Adopt 10 CFR 50.69, Risk-Informed Categorization and Treatment of Structures, Systems and Components for Nuclear Power Reactors DCL-23-083, Upcoming Meeting with Nuclear Security and Incident Response Staff2023-09-13013 September 2023 Upcoming Meeting with Nuclear Security and Incident Response Staff DCL-23-078, Nuclear Material Transaction Report for New Fuel2023-09-0606 September 2023 Nuclear Material Transaction Report for New Fuel DCL-23-070, Withdrawal of Request Regarding Senior Reactor Operator License Application2023-08-16016 August 2023 Withdrawal of Request Regarding Senior Reactor Operator License Application DCL-23-068, Nuclear Material Transaction Report for New Fuel2023-08-0909 August 2023 Nuclear Material Transaction Report for New Fuel DCL-23-066, Nuclear Material Transaction Report for New Fuel2023-08-0303 August 2023 Nuclear Material Transaction Report for New Fuel DCL-23-065, Letter DCL-23-065 Request That Exam Material Be Withheld from Public Disclosure2023-07-27027 July 2023 Letter DCL-23-065 Request That Exam Material Be Withheld from Public Disclosure DCL-23-064, Nuclear Material Transaction Report for New Fuel2023-07-26026 July 2023 Nuclear Material Transaction Report for New Fuel DCL-23-054, License Amendment Request 23-01 Revision to Technical Specifications to Adopt Risk-Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b2023-07-13013 July 2023 License Amendment Request 23-01 Revision to Technical Specifications to Adopt Risk-Informed Completion Times TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b DCL-23-055, Nuclear Material Transaction Report for New Fuel2023-07-0606 July 2023 Nuclear Material Transaction Report for New Fuel DCL-23-042, Independent Spent Fuel Storage Installation, Submittal of Quality Assurance Program Description, Revision 02023-05-24024 May 2023 Independent Spent Fuel Storage Installation, Submittal of Quality Assurance Program Description, Revision 0 DCL-23-032, Independent Spent Fuel Storage Installation Docket No. 72-27, Materials License Number SNM-2514 Humboldt Bay Independent Spent Fuel Storage Installation - NRC Requested Notification of Withdrawal from Voluntary Program2023-05-22022 May 2023 Independent Spent Fuel Storage Installation Docket No. 72-27, Materials License Number SNM-2514 Humboldt Bay Independent Spent Fuel Storage Installation - NRC Requested Notification of Withdrawal from Voluntary Program DCL-23-041, 10 CFR 50.46 Annual Report of Emergency Core Cooling System Evaluation Model Changes for Peak Cladding Temperature for 20222023-05-22022 May 2023 10 CFR 50.46 Annual Report of Emergency Core Cooling System Evaluation Model Changes for Peak Cladding Temperature for 2022 DCL-23-038, Revision to the Unit 1 Reactor Vessel Material Surveillance Program Withdrawal Schedule2023-05-15015 May 2023 Revision to the Unit 1 Reactor Vessel Material Surveillance Program Withdrawal Schedule DCL-23-034, 2022 Annual Nonradiological Environmental Operating Report2023-05-0101 May 2023 2022 Annual Nonradiological Environmental Operating Report DCL-23-036, 2022 Annual Radiological Environmental Operating Report2023-05-0101 May 2023 2022 Annual Radiological Environmental Operating Report DCL-23-025, 2022 Annual Radioactive Effluent Release Report2023-05-0101 May 2023 2022 Annual Radioactive Effluent Release Report DCL-2023-512, Submittal of Receiving Water Monitoring Program 2022 Annual Report2023-04-27027 April 2023 Submittal of Receiving Water Monitoring Program 2022 Annual Report DCL-23-035, Response to Request for Additional Information on Request Regarding Senior Reactor Operator License Application2023-04-24024 April 2023 Response to Request for Additional Information on Request Regarding Senior Reactor Operator License Application DCL-23-028, Technical Specification Bases, Revision 142023-04-24024 April 2023 Technical Specification Bases, Revision 14 DCL-2023-511, Report on Discharge Monitoring for the First Quarter of 20232023-04-20020 April 2023 Report on Discharge Monitoring for the First Quarter of 2023 DCL-23-031, Submittal of Annual Report of Occupational Radiation Exposure for 20222023-04-19019 April 2023 Submittal of Annual Report of Occupational Radiation Exposure for 2022 DCL-23-024, Independent Spent Fuel Storage Installation, Response to Nrg Request for Additional Information for Revision to License Amendment Request 22-01 Request for Approval of Alternative Security Measures for Early Warning System2023-04-0404 April 2023 Independent Spent Fuel Storage Installation, Response to Nrg Request for Additional Information for Revision to License Amendment Request 22-01 Request for Approval of Alternative Security Measures for Early Warning System DCL-23-022, 2023 Annual Statement of Insurance for Pacific Gas and Electric Companys Diablo Canyon Power Plant2023-03-29029 March 2023 2023 Annual Statement of Insurance for Pacific Gas and Electric Companys Diablo Canyon Power Plant DCL-23-023, Decommissioning Funding Report for Diablo Canyon Power Plant, Units 1 and 22023-03-28028 March 2023 Decommissioning Funding Report for Diablo Canyon Power Plant, Units 1 and 2 DCL-23-021, Independent Spent Fuel Storage Installation, Emergency Plan Update2023-03-23023 March 2023 Independent Spent Fuel Storage Installation, Emergency Plan Update DCL-23-020, Responses to NRC Questions Regarding License Renewal Efforts2023-03-17017 March 2023 Responses to NRC Questions Regarding License Renewal Efforts DCL-23-009, Owner'S Activity Report for Unit 2 Twenty-Third Refueling Outage2023-02-22022 February 2023 Owner'S Activity Report for Unit 2 Twenty-Third Refueling Outage DCL-23-008, Request Regarding Senior Reactor Operator License Application2023-02-22022 February 2023 Request Regarding Senior Reactor Operator License Application DCL-2023-503, Annual Sea Turtle Report2023-01-26026 January 2023 Annual Sea Turtle Report DCL-2023-502, (DCPP) 4th Quarter 2022 Report on Discharge Self-Monitoring2023-01-18018 January 2023 (DCPP) 4th Quarter 2022 Report on Discharge Self-Monitoring DCL-22-091, Revised Steam Generator Tube Inspection Report for Twenty-First Refueling Outage2022-12-20020 December 2022 Revised Steam Generator Tube Inspection Report for Twenty-First Refueling Outage DCL-22-089, Core Operating Limits Report for Unit 2 Cycle 242022-12-20020 December 2022 Core Operating Limits Report for Unit 2 Cycle 24 DCL-22-085, Request to Resume Review of the License Renewal Application or, Alternatively, for an Exemption from 10 CFR 2.109(b), Concerning a Timely Renewal Application2022-10-31031 October 2022 Request to Resume Review of the License Renewal Application or, Alternatively, for an Exemption from 10 CFR 2.109(b), Concerning a Timely Renewal Application DCL-22-041, Site-Specific Decommissioning Cost Estimate, Revision 12022-10-12012 October 2022 Site-Specific Decommissioning Cost Estimate, Revision 1 DCL-22-042, Post-Shutdown Decommissioning Activities Report, Revision 12022-10-12012 October 2022 Post-Shutdown Decommissioning Activities Report, Revision 1 2024-01-29
[Table view] Category:Response to Request for Additional Information (RAI)
MONTHYEARDCL-23-035, Response to Request for Additional Information on Request Regarding Senior Reactor Operator License Application2023-04-24024 April 2023 Response to Request for Additional Information on Request Regarding Senior Reactor Operator License Application DCL-23-024, Independent Spent Fuel Storage Installation, Response to Nrg Request for Additional Information for Revision to License Amendment Request 22-01 Request for Approval of Alternative Security Measures for Early Warning System2023-04-0404 April 2023 Independent Spent Fuel Storage Installation, Response to Nrg Request for Additional Information for Revision to License Amendment Request 22-01 Request for Approval of Alternative Security Measures for Early Warning System DCL-23-020, Responses to NRC Questions Regarding License Renewal Efforts2023-03-17017 March 2023 Responses to NRC Questions Regarding License Renewal Efforts DCL-22-058, Responses to NRC Requests for Additional Information on LAR 20-03, Proposed Technical Specifications and Revised License Conditions for the Permanently Defueled Condition2022-07-20020 July 2022 Responses to NRC Requests for Additional Information on LAR 20-03, Proposed Technical Specifications and Revised License Conditions for the Permanently Defueled Condition ML22172A1642022-06-21021 June 2022 Response to Public Follow-up Question Regarding Unit 1 Reactor Vessel Neutron Embrittlement Coupon Testing - June 21, 2022 DCL-22-018, Independent Spent Fuel Storage Installation Responses to NRC Requests for Additional Information on License Amendment Request 21-04, Proposed Changes to the Emergency Plan for Post-Shutdown and Permanently.2022-03-23023 March 2022 Independent Spent Fuel Storage Installation Responses to NRC Requests for Additional Information on License Amendment Request 21-04, Proposed Changes to the Emergency Plan for Post-Shutdown and Permanently. DCL-21-060, Response to Request for Additional Information on License Amendment Request 21-03, Request for Revision to Technical Specification 3.8.1, 'Ac Sources - Operating,' to Support Diesel Fuel Oil Transfer System.2021-09-14014 September 2021 Response to Request for Additional Information on License Amendment Request 21-03, Request for Revision to Technical Specification 3.8.1, 'Ac Sources - Operating,' to Support Diesel Fuel Oil Transfer System. DCL-21-048, Response to Request for Additional Information on Emergency License Amendment Request 21-05, Revision to Technical Specification 3.7.8, 'Auxiliary Saltwater (Asw) System'2021-07-0707 July 2021 Response to Request for Additional Information on Emergency License Amendment Request 21-05, Revision to Technical Specification 3.7.8, 'Auxiliary Saltwater (Asw) System' DCL-21-040, Responses to NRC Requests for Additional Information on LAR 20-03, Proposed Technical Specifications and Revised License Conditions for the Permanently Defueled Condition2021-05-13013 May 2021 Responses to NRC Requests for Additional Information on LAR 20-03, Proposed Technical Specifications and Revised License Conditions for the Permanently Defueled Condition DCL-21-034, Response to Request for Additional Information on Final Supplemental Response to Generic Letter 20042021-04-15015 April 2021 Response to Request for Additional Information on Final Supplemental Response to Generic Letter 2004 DCL-20-088, Response to NRC Request for Additional Information Regarding Diablo Canyon Unit 2 Fall 2019 Steam Generator Tube Inspection Report2020-10-16016 October 2020 Response to NRC Request for Additional Information Regarding Diablo Canyon Unit 2 Fall 2019 Steam Generator Tube Inspection Report DCL-20-072, Response to Additional NRC Request for Additional Information Regarding License Amendment Request 20-01, Exigent Request for Revision to Technical Specification 3.7.5, 'Auxiliary Feedwater System'2020-08-20020 August 2020 Response to Additional NRC Request for Additional Information Regarding License Amendment Request 20-01, Exigent Request for Revision to Technical Specification 3.7.5, 'Auxiliary Feedwater System' DCL-20-069, Response to NRC Request for Additional Information Regarding License Amendment Request 20-01, Exigent Request for Revision to Technical Specification 3.7.5, 'Auxiliary Feedwater System'2020-08-18018 August 2020 Response to NRC Request for Additional Information Regarding License Amendment Request 20-01, Exigent Request for Revision to Technical Specification 3.7.5, 'Auxiliary Feedwater System' DCL-20-068, Response to NRC Request for Additional Information Regarding License Amendment Request 20-01, Exigent Request for Revision to Technical Specification 3.7.5, 'Auxiliary Feedwater System2020-08-16016 August 2020 Response to NRC Request for Additional Information Regarding License Amendment Request 20-01, Exigent Request for Revision to Technical Specification 3.7.5, 'Auxiliary Feedwater System DCL-20-012, Response to NRC Request for Additional Information Regarding Diablo Canyon Power Plant, Units 1 and 2 - Post-Shutdown Decommissioning Activities Report2020-03-11011 March 2020 Response to NRC Request for Additional Information Regarding Diablo Canyon Power Plant, Units 1 and 2 - Post-Shutdown Decommissioning Activities Report DCL-19-088, Supplemental Information Response to NRC Request for Additional Information Regarding 'License Amendment Request 19-01, Proposed Changes to the Intake Structure Physical Security Classification'2019-10-24024 October 2019 Supplemental Information Response to NRC Request for Additional Information Regarding 'License Amendment Request 19-01, Proposed Changes to the Intake Structure Physical Security Classification' DCL-19-056, Response to NRC Request for Additional Information (Supplemental) Regarding License Amendment Request 18-01, Request to Revise Emergency Plan Response Organization Staffing and Augmentation.2019-07-0303 July 2019 Response to NRC Request for Additional Information (Supplemental) Regarding License Amendment Request 18-01, Request to Revise Emergency Plan Response Organization Staffing and Augmentation. DCL-19-039, Response to NRC Request for Additional Information Regarding License Amendment Request 18-01, Request to Revise Emergency Plan Response Organization Staffing and Augmentation2019-05-0202 May 2019 Response to NRC Request for Additional Information Regarding License Amendment Request 18-01, Request to Revise Emergency Plan Response Organization Staffing and Augmentation ML19074A1092019-03-14014 March 2019 Response to Letter Dated February 26, 2019, Requesting NRC Opinion on Potential Impacts Due to Pacific Gas and Electric Company'S Bankruptcy Filing DCL-17-108, Spent Fuel Pool Evaluation Supplemental Report, Response to NRC Request for Information Pursuant to 10 CFR 50.54(f)Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi..2017-12-18018 December 2017 Spent Fuel Pool Evaluation Supplemental Report, Response to NRC Request for Information Pursuant to 10 CFR 50.54(f)Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi.. ML17324B3442017-11-20020 November 2017 Response to NRC Request for Additional Information Regarding Request for Approval of Alternative for Application of Full Structural Weld Overlay, REP-RHRSWOL, Units 1 and 2 DCL-17-073, Supplement to License Amendment Request 16-04 Revision 6. Development of Emergency Action Levels for Non-Passive Reactors.2017-08-17017 August 2017 Supplement to License Amendment Request 16-04 Revision 6. Development of Emergency Action Levels for Non-Passive Reactors. DCL-17-060, Response to NRC Request for Additional Information Regarding Relief Requests NDE-SLH U2, NDE-LSL U2, NDE-LHC U2, NDE-LHM U2, and NDE-ONV U22017-06-21021 June 2017 Response to NRC Request for Additional Information Regarding Relief Requests NDE-SLH U2, NDE-LSL U2, NDE-LHC U2, NDE-LHM U2, and NDE-ONV U2 ML17179A0192017-06-21021 June 2017 PG&E Response to NRC Request for Additional Information Regarding License Amendment Request 16-04, Request to Adopt Emergency Action Level Schemes Pursuant to NEI 99-01, Revision 6, 'Development of Emergency Action Levels for Non-Passive .. DCL-16-114, Response to Generic Letter 2016-012016-11-0303 November 2016 Response to Generic Letter 2016-01 DCL-16-101, Diablo Canyon, Units 1 and 2, Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term2016-10-0606 October 2016 Diablo Canyon, Units 1 and 2, Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term DCL-16-101, Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term2016-10-0606 October 2016 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term ML16287A7552016-10-0606 October 2016 Technical Assessment Implementation of Alternative Source Terms Summary of Dose Analyses and Results Revision 4 DCL-16-094, Response to NRC Request for Additional Information Regarding License Amendment Request 16-02, License Amendment Request to Revise Technical Specification 3.4.12, 'Low Temperature Overpressure Protection (LTOP) System'.2016-09-28028 September 2016 Response to NRC Request for Additional Information Regarding License Amendment Request 16-02, License Amendment Request to Revise Technical Specification 3.4.12, 'Low Temperature Overpressure Protection (LTOP) System'. DCL-16-062, Response to RAI Regarding License Amendment Request 13-02, Revision to Technical Specifications to Adopt Risk Informed Completion Times TSTF-505, Revision 1, 'Provide Risk-Informed Extended Completion Times - Ritstf..2016-07-0707 July 2016 Response to RAI Regarding License Amendment Request 13-02, Revision to Technical Specifications to Adopt Risk Informed Completion Times TSTF-505, Revision 1, 'Provide Risk-Informed Extended Completion Times - Ritstf.. DCL-16-044, Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term.2016-04-21021 April 2016 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term. DCL-16-023, Response to NRC Letter Dated February 2, 2016, Requests for Additional Information for the Review of the License Renewal Application - Set 39.2016-02-25025 February 2016 Response to NRC Letter Dated February 2, 2016, Requests for Additional Information for the Review of the License Renewal Application - Set 39. DCL-16-019, Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term.2016-02-10010 February 2016 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term. ML16039A3662016-02-0808 February 2016 Units and 2 - Updated Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 Flooding. Part 1 of 2 DCL-16-016, Units and 2 - Updated Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 Flooding. Part 2 of 22016-02-0808 February 2016 Units and 2 - Updated Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.1 Flooding. Part 2 of 2 DCL-16-015, Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term.2016-02-0101 February 2016 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term. DCL-16-013, Response to NRC Request for Additional Information Regarding Relief Request NDE-FWNS-U1/U22016-01-27027 January 2016 Response to NRC Request for Additional Information Regarding Relief Request NDE-FWNS-U1/U2 DCL-16-012, Clarifications to Environmental Request for Additional Information Responses for the Review of the License Renewal Application2016-01-26026 January 2016 Clarifications to Environmental Request for Additional Information Responses for the Review of the License Renewal Application ML16049A0112016-01-25025 January 2016 Attachment 2 - Pacific Gas and Electric Company Diablo Canyon Power Plant Units 1 and 2, Process Protection System (PPS) Replacement Interface Requirements Specification Nuclear Safety-Related, Rev 9 DCL-16-011, Attachment 2 - Pacific Gas and Electric Company Diablo Canyon Power Plant Units 1 and 2, Process Protection System (PPS) Replacement Interface Requirements Specification Nuclear Safety-Related, Rev 92016-01-25025 January 2016 Attachment 2 - Pacific Gas and Electric Company Diablo Canyon Power Plant Units 1 and 2, Process Protection System (PPS) Replacement Interface Requirements Specification Nuclear Safety-Related, Rev 9 ML16049A0092016-01-25025 January 2016 Pacific Gas & Electric Company Diablo Canyon Units 1 and 2 - Response to Request for Additional Information and Submittal of Advanced Logic System Phase 2 Documents for the License Amendment Request for Process Protection System Replacement DCL-16-011, Pacific Gas & Electric Company Diablo Canyon Units 1 and 2 - Response to Request for Additional Information and Submittal of Advanced Logic System Phase 2 Documents for the License Amendment Request for Process Protection System Replaceme2016-01-25025 January 2016 Pacific Gas & Electric Company Diablo Canyon Units 1 and 2 - Response to Request for Additional Information and Submittal of Advanced Logic System Phase 2 Documents for the License Amendment Request for Process Protection System Replacement DCL-15-156, Response to NRC Request for Additional Information - National Fire Protection Association Standard 805 and Supplement2015-12-31031 December 2015 Response to NRC Request for Additional Information - National Fire Protection Association Standard 805 and Supplement ML15355A5502015-12-21021 December 2015 Transmittal of Response to NRC Request for Additional Information Dated October 1, 2015, and November 13, 2015, Regarding Recommendation 2.1 of the Near-Term Task Force Seismic Hazard and Screening Report DCL-15-154, Response to NRC Request for Additional Information Dated October 1, 2015, and November 13, 2015, Regarding Recommendation 2.1 of the Near-Term Task Force Seismic Hazard and Screening Report2015-12-21021 December 2015 Response to NRC Request for Additional Information Dated October 1, 2015, and November 13, 2015, Regarding Recommendation 2.1 of the Near-Term Task Force Seismic Hazard and Screening Report ML16004A3612015-12-17017 December 2015 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03 - Updated Final Safety Analysis Report Markup, Revision 1. Part 1 of 3 ML16004A3552015-12-17017 December 2015 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Regulatory Guide 1.183 Conformance Tables, Revision 1 ML16004A3562015-12-17017 December 2015 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03, Application of Alternative Source Term. ML16004A3572015-12-17017 December 2015 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03 - Updated Final Safety Analysis Report Markup, Revision 1. Part 2 of 3 DCL-15-152, Response to NRC Request for Additional Information Regarding License Amendment Request 15-03 - Updated Final Safety Analysis Report Markup, Revision 1. Part 3 of 32015-12-17017 December 2015 Response to NRC Request for Additional Information Regarding License Amendment Request 15-03 - Updated Final Safety Analysis Report Markup, Revision 1. Part 3 of 3 2023-04-04
[Table view] |
Text
Pacific Gas and Electric Company(')
Kenneth Cortese Diablo Canyon Power Plant Nuclear Industry Relations Manager, P.O. Box 56 Chief Avila Beach, CA 93424 805.545.3151 Internal: 691.3151 December 18, 2017 PG&E Letter DCL-17 -108 U.S. Nuclear Regulatory Commission 10 CFR 50.4 ATTN: Document Control Desk 10 CFR 50.54(f)
Washington, D.C. 20555-0001 Docket No. 50-275, OL-DPR-80 Docket No. 50-323, OL-DPR-82 Diablo Canyon Power Plant Units 1 and 2 Spent Fuel Pool Evaluation Supplemental Report. Response to NRC Request for Information Pursuant to 10 CFR 50.54(0 Regarding Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident
References:
- 1. NRC Letter, "Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendations 2.1, 2.3, and 9.3, of the Near-Term Task Force Review of Insights from the Fukushima Dai-lchi Accident," dated March 12, 2012, ADAMS Accession Number ML12053A340
- 2. NRC Letter, "Final Determination of Licensee Seismic Probabilistic Risk Assessments Under the Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendation 2.1
'Seismic' of the Near-Term Task Force Review of Insights from the Fukushima Dai-lchi Accident," dated October 27, 2015, ADAMS Accession Number ML15194A015
- 3. NEI Letter, "Request for Endorsement of Seismic Evaluation Guidance:
Spent Fuel Pool Integrity Evaluation (EPRI 3002009564)," dated January 31, 2017, ADAMS Accession Number ML17031A171
- 4. EPRI Technical Report No. 3002009564, "Seismic Evaluation Guidance:
Spent Fuel Pool Integrity Evaluation," dated January 2017, ADAMS Accession Number ML17031A176
- 5. NRC Letter, "Endorsement of Electric Power Research Institute Report 3002009564, 'Seismic Evaluation Guidance: Spent Fuel Pool Integrity Evaluation,"' dated February 28, 2017, ADAMS Accession Number ML17034A408
- 6. PG&E Letter DCL-15-035, "Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights from A member of the STARS Alliance Callaway
Document Control Desk PG&E Letter DCL-17-108 December 18, 2017 Page 2 the Fukushima Dai-ichi Accident: Seismic Hazard and Screening Report,"
March 11, 2015, ADAMS Accession Number ML15071A046
- 7. PG&E Letter DCL-15-154, "Response to NRC Request for Additional Information dated October 1, 2015, and November 13, 2015, Regarding Recommendation 2.1 of the Near-Term Task Force Seismic Hazard and Screening Report," December 21, 2015, ADAMS Accession Numbers ML15355A550 and ML15355A551
- 8. NRC Letter, "Diablo Canyon Power Plant, Unit Nos. 1 and 2 - Staff Assessment of Information Provided under Title 10 of the Code of Federal Regulations Part 50, Section 50.54(f), Seismic Hazard Reevaluations for Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-lchi Accident," dated December 21, 2016, ADAMS Accession Number ML16341C057
Dear Commissioners and Staff:
On March 12, 2012, the Nuclear Regulatory Commission (NRC) issued a Request for Information per 10 CFR 50.54(f) (Reference 1) to all power reactor licensees. By letter dated October 27, 2015 (Reference 2), the NRC transmitted final seismic information request tables which identified that Pacific Gas and Electric Company (PG&E) is to conduct a limited scope Spent Fuel Pool (SFP) Evaluation for the Diablo Canyon Power Plant (DCPP).
By Reference 3, the Nuclear Energy Institute (NEI) submitted the Electric Power Research Institute (EPRI) report entitled "Seismic Evaluation Guidance: Spent Fuel Pool Integrity Evaluation" (EPRI 3002009564) (Reference 4) for NRC review and endorsement. NRC endorsement was provided by Reference 5.
EPRI 3002009564 provides criteria for evaluating the seismic adequacy of a SFP to the reevaluated ground motion response spectrum hazard levels. Section 4.3 of EPRI 3002009564 lists the parameters to be verified to confirm that the results of the report are applicable to PG&E, and that the DCPP SFP is seismically adequate in accordance with the Near-Term Task Force (NTTF) Recommendation 2.1 Seismic evaluation criteria.
The enclosure to this letter provides the data for DCPP that confirm applicability of the EPRI 3002009564 criteria and confirm that the DCPP SFPs are seismically adequate in accordance with the NTTF Recommendation 2.1 Seismic evaluation criteria.
PG&E makes no new or revised regulatory commitments (as defined by NEI 99-04) in this letter.
A member of the STARS Alliance Callaway
Document Control Desk PG&E Letter DCL-17-108 December 18, 2017 Page 3 If you have any questions or require additional information, please contact Mr. Hossein Hamzehee at 805-545-4720.
I have been delegated the authority of James A. Welsch, Vice President, Generation and Chief Nuclear Officer, during his absence. I state under penalty of perjury that the foregoing is true and correct.
Executed on December 18, 2017.
Sincerely, Kenneth Cortese Nuclear Industry Relations Manager, Chief mjrm/50702923 Enclosure cc: Diablo Distribution cc/enc:
Brian E. Holian, NRC/NRR Director (Acting)
Kriss M. Kennedy, NRC Region IV Administrator Christopher W. Newport, NRC Senior Resident Inspector Balwant K. Singal, NRR Senior Project Manager Brett A. Titus, NRR Senior Project Manager A member of the STARS Alliance Callaway
Enclosure PG&E Letter DCL-17-108 Pacific Gas and Electric Company Diablo Canyon Power Plant Units 1 and 2 License Nos. OL-DPR-80 and OL-DPR-82 Site-Specific Spent Fuel Pool Criteria for the Diablo Canyon Power Plant Page 1 of 6
Enclosure PG&E Letter DCL-17-108 Introduction The 50.54(f) letter (Reference 1) requested that, in conjunction with the response to Near-Term Task Force (NTTF) Recommendation 2.1, a seismic evaluation be made of the spent fuel pool (SFP). More specifically, plants were asked to consider "all seismically induced failures that can lead to draining of the SFP." Such an evaluation would be needed for any plant in which the ground motion response spectrum (GMRS) exceeds the safe shutdown earthquake 1 (SSE) in the 1 to 10 Hz frequency range. The staff confirmed through References 2 and 8 that the GMRS exceeds the SSE and concluded that a SFP evaluation is merited for the Diablo Canyon Power Plant (DCPP). By letter dated February 28, 2017 (Reference 5), the staff determined that EPRI 3002009564 was an acceptable approach for performing SFP evaluations considering the GMRS hazard levels.
Spent Fuel Pool Criteria for Diablo Canyon Power Plant The table below lists the criteria from Section 4.3 of EPRI 3002009564 along with data for DCPP that confirm applicability of the EPRI 3002009564 criteria and confirm that the SFPs are seismically adequate in accordance with NTTF 2.1 Seismic evaluation criteria.
SFP Criteria from EPRI 3002009564 Site-Specific Data Site Parameters
- 1. The site-specific GMRS should be The DCPP GMRS used in the SFP evaluations the same as that submitted to the (Reference 7, Table 6-1), is the same GMRS that NRC between March 2014 and July was accepted by the NRC (Reference 8) 2015, which the NRC has found acceptable for responding to the Therefore, this criterion is met for DCPP.
NRC 50.54(f) letter (Reference 8).
Structural Parameters
- 2. Site-specific calculations, performed Site-specific calculations (Reference 9), performed in accordance with Section 4.1 of in accordance with Section 4.1 of EPRI EPRI 3002009564 should 3002009564, demonstrates that the limiting SFP demonstrate that the limiting SFP HCLPF is 3.5g, which is greater than the 5°/o high consequence low probability damped spectral acceleration at 5 Hz from the site-failure (HCLPF) is greater than the specific GMRS (1.86g).
site-specific GMRS in the frequency range of interest (e.g., 10-20Hz). Therefore, this criterion is met for DCPP.
- 3. The SFP structure should be The Auxiliary Building, which houses the SFPs, is included in the Civil Inspection included in the DCPP Civil Inspection Program Program performed in accordance (Reference 10, Section 5.1.3). This program with Maintenance Rule. includes regular inspections in accordance with 10 CFR 50.65.
Therefore, this criterion is met for DCPP.
The Double Design Earthquake is equivalent to a Safe Shutdown Earthquake for DCPP.
Page 2 of 6
Enclosure PG&E Letter DCL-17-108 SFP Criteria from EPRI 3002009564 Site-Specific Data Non-Structural Parameters
- 4. To confirm applicability of the piping The piping attached to the SFPs is identified on evaluation in Section 4.2 of EPRI Reference 11 (Unit 1) and Reference 12 (Unit 2).
3002009564, piping attached to the The SFP water surface is normally maintained at SFP should have penetrations no an elevation of 137'-8", but can range from 137'-4" more than 6 ft below water surface. to 139'-0" (Reference 13, Section 4.4.4.1 ). The elevations of the penetrations for the piping attached to the SFPs are in the range of 134' -0" to 138'-6" (References 14 & 15 (Unit 1) and 16 & 17 (Unit 2)), which are no more than 6' below the water surface.
Therefore, this criterion is met for DCPP.
- 5. To confirm ductile behavior under The SFP gates are constructed from a stainless increased seismic demands, SFP steel alloy (Reference 18 and Note 8 on gates should be constructed from Reference 19).
either aluminum or stainless steel alloys. Therefore, this criterion is met for DCPP.
- 6. Anti-siphoning devices should be The piping attached to the SFPs is identified on installed on any piping that could Reference 11 (Unit 1) and Reference 12 (Unit 2).
lead to siphoning water from the The only piping that is potentially susceptible to SFP. In addition, for any cases siphoning significant amounts of water from the where active anti-siphoning devices SFPs are the return piping from the SFP Cooling are attached to 2-inch or smaller Pumps (8" diameter Line No. 159) and the fill piping and have extremely large piping from the Hold-Up Tank Recirculation Pumps extended operators, the valves (3" diameter Line No. 1119).
should be walked down to confirm Passive anti-siphoning devices (i.e., holes) are adequate lateral support. provided in Line Nos. 159 and 1119. These features preclude the siphoning of water from the SFP. Walkdowns were performed to visually verify that the anti-siphon holes are present (References 20 (Unit 1) and 21 (Unit 2)).
Therefore, this criterion is met for DCPP.
- 7. To confirm applicability of the The DCPP SFPs are 37' -3" long 2 and 35' wide sloshing evaluation in Section 4.2 of (Reference 23 (Unit 1) and Reference 24 (Unit 2)),
EPRI 3002009564, the maximum which are both less than 125'. The DCPP SFPs SFP horizontal dimension (length or have a depth of 41' (Reference 24 (Units 1 & 2)),
width) should be less than 125 ft and which is greater than 36'.
the SFP depth should be greater than 36ft. Therefore, this criterion is met for DCPP.
2 Excluding the Fuel Transfer Canal (approximately 9').
Page 3 of 6
Enclosure PG&E Letter DCL-17-108 SFP Criteria from EPRI 3002009564 Site-Specific Data
- 8. To confirm applicability of the The DCPP SFPs have a surface area of evaporation loss evaluation in te approximately 1,300 (Reference 23 (Unit 1) and Section 4.2 of EPRI 3002009564, Reference 24 (Unit 2)), which is greater than the SFP surface area should be 500 te. The licensed reactor thermal power for greater than 500 te and the licensed DCPP is 3,411 MWt per unit (Reference 25, reactor core thermal power should Section 1.1), which is less than 4,000 MWt per be less than 4,000 MWt per unit. unit.
Therefore, this criterion is met for DCPP.
References
- 1. NRC Letter, "Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendations 2.1, 2.3, and 9.3, of the Near-Term Task Force Review of Insights from the Fukushima Dai-lchi Accident," dated March 12, 2012, ADAMS Accession Number ML12053A340
- 2. NRC Letter, "Final Determination of Licensee Seismic Probabilistic Risk Assessments Under the Request for Information Pursuant to Title 10 of the Code of Federal Regulations 50.54(f) Regarding Recommendation 2.1 'Seismic' of the Near-Term Task Force Review of Insights from the Fukushima Dai-lchi Accident," dated October 27, 2015, ADAMS Accession Number ML15194A015
- 3. NEI Letter, "Request for Endorsement of Seismic Evaluation Guidance: Spent Fuel Pool Integrity Evaluation (EPRI3002009564)," dated January 31, 2017, ADAMS Accession Number ML17031A171
- 4. EPRI Technical Report No. 3002009564, "Seismic Evaluation Guidance: Spent Fuel Pool Integrity Evaluation," dated January 2017, ADAMS Accession Number ML17031A176
- 5. NRC Letter, "Endorsement of Electric Power Research Institute Report 3002009564,
'Seismic Evaluation Guidance: Spent Fuel Pool Integrity Evaluation,"' dated February 28, 2017, ADAMS Accession Number ML17034A408
- 6. PG&E Letter DCL-15-035, "Response to NRC Request for Information Pursuant to 10 CFR 50.54(f) Regarding the Seismic Aspects of Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-ichi Accident: Seismic Hazard and Screening Report," March 11, 2015, ADAMS Accession Number ML15071A046
- 7. PG&E Letter DCL-15-154, "Response to NRC Request for Additional Information dated October 1, 2015, and November 13, 2015, Regarding Recommendation 2.1 of the Near-Term Task Force Seismic Hazard and Screening Report," December 21, 2015, ADAMS Accession Numbers ML15355A550 and ML15355A551
- 8. NRC Letter, "Diablo Canyon Power Plant, Unit Nos. 1 and 2 - Staff Assessment of Information Provided under Title 10 of the Code of Federal Regulations Part 50, Page 4 of6
Enclosure PG&E Letter DCL-17-108 Section 50.54(f), Seismic Hazard Reevaluations for Recommendation 2.1 of the Near-Term Task Force Review of Insights from the Fukushima Dai-lchi Accident,"
dated December 21, 2016, ADAMS Accession Number ML16341C057
- 9. PG&E Calculation No. 128027-CA-229, "High Confidence Low Probability of Failure Capacity Evaluation of the Spent Fuel Pool," Revision 0
- 10. PG&E Departmental Administrative Procedure No. MA 1.NE1, "Maintenance Rule Monitoring Program- Civil Implementation," Revision 6
- 11. PG&E Drawing No. 102013, Sheet 2, "Unit 1 -Spent Fuel Pit Cooling System,"
Revision 45
- 12. PG&E Drawing No. 108013, Sheet 2, "Unit 2- Spent Fuel Pit Cooling System,"
Revision 36
- 13. PG&E Design Criteria Memorandum No. S-13, "Spent Fuel Pool Cooling System,"
Revision 31
- 14. PG&E Drawing No. 500086, "Unit 1 -Mechanical, Area J & L, Plan at El. 115'- 0","
Revision 16
- 15. PG&E Drawing No. 500129, "Unit 1- Drainage & Fire Fighting- Auxiliary Bldg. Area J, Plan at El. 115'-0"," Revision 12
- 16. PG&E Drawing No. 500936, "Unit 2- Piping and Mechanical, Area J & L, Plan at El.
115'-0"," Revision 9
- 17. PG&E Drawing No. 501002, "Unit 2- Civil Drainage and Fire Fighting, Area J, Auxiliary Building, Plan at Elevation 115'-0"," Revision 7
- 18. PG&E Drawing No. 439504, "Unit 1 & 2 - Civil Spent Fuel Pool Gate Details, Auxiliary Building- Area J," Revision 10
- 19. PG&E Drawing No. 439501, "Unit 1 - Civil Plan & Details, Spent Fuel Pool Liner, Auxiliary Building- Area J," Revision 13
- 20. PG&E Letter DCL-12-118, "Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.3 Seismic Unit 1 ," November 27, 2012, ADAMS Accession Numbers ML12333A268 and ML12333A266 21 . PG&E Letter DCL-12-119, "Response to Request for Information Pursuant to 10 CFR 50.54(f) Regarding Recommendation 2.3 Seismic Unit 2," November 27, 2012, ADAMS Accession Numbers ML12333A270, ML12333A271, and ML12333A269 22 . PG&E Drawing No. 438432, "Unit 1 -Civil Concrete Outline, Auxiliary Building, El. 115'-0", North Area J, GE, GW," Revision 15 23 . PG&E Drawing No. 439533, "Unit 2- Civil Concrete Outline, Aux. Building, Elev. 115'-0"- Area J, GW & GE," Revision 10
- 24. PG&E Drawing No. 443490, "Units 1 & 2 - Concrete Outline, Section F3 - F3 & F4-F4, Auxiliary Building- Areas J & GE," Revision 8 Page 5 of 6
Enclosure PG&E Letter DCL-17-108
- 25. PG&E, "DCPP Units 1 & 2 FSAR Update," Revision 23 Page 6 of 6