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Category:Letter
MONTHYEARDCL-24-075, Response to Request for Additional Information for 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 React2024-08-0808 August 2024 Response to Request for Additional Information for 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 React IR 05000275/20240022024-08-0606 August 2024 Integrated Inspection Report 05000275/2024002 and 05000323/2024002 DCL-24-070, License Amendment Request 24-03 Revision to Technical Specification 5.5.16 for Permanent Extension of Type a and Type C Leak Rate Test Frequencies2024-07-31031 July 2024 License Amendment Request 24-03 Revision to Technical Specification 5.5.16 for Permanent Extension of Type a and Type C Leak Rate Test Frequencies DCL-24-071, Core Operating Limits Report for Unit 2 Cycle 252024-07-22022 July 2024 Core Operating Limits Report for Unit 2 Cycle 25 DCL-2024-523, Submittal of Report on Discharge Self-Monitoring2024-07-18018 July 2024 Submittal of Report on Discharge Self-Monitoring ML24187A1352024-07-16016 July 2024 Letter to Paula Gerfen - Diablo Canyon Units 1 and 2 - Summary of June 2024 Audit Related to the License Renewal Application Severe Accident Mitigation Alternatives Review IR 05000275/20240142024-07-11011 July 2024 Age-Related Degradation Inspection Report 05000275/2024014 and 05000323/2024014 IR 05000275/20243012024-07-10010 July 2024 NRC Initial Operator Licensing Examination Approval 05000275/2024301; 05000323/2024301 IR 05000275/20244012024-07-0808 July 2024 Security Baseline Inspection Report 05000275/2024401 and 05000323/2024401 (Full Report) IR 05000323/20240112024-07-0303 July 2024 License Renewal Phase Report 05000323/2024011 DCL-2024-527, Sea Turtle Stranding Report (Loggerhead Sea Turtle) Diablo Canyon Power Plant2024-07-0101 July 2024 Sea Turtle Stranding Report (Loggerhead Sea Turtle) Diablo Canyon Power Plant DCL-24-066, Request to Extend the Nrg Approval of Alternative for Use of Full Structural Weld Overlay, REP-RHR-SWOL2024-06-27027 June 2024 Request to Extend the Nrg Approval of Alternative for Use of Full Structural Weld Overlay, REP-RHR-SWOL ML24155A2182024-06-18018 June 2024 OEDO-23-00350-NRR - (LTR-23-0228-1) - Closure Letter - 10 CFR 2.206 Petition from Mothers for Peace and Friends of the Earth Regarding Diablo Canyon ML24129A1762024-06-14014 June 2024 National Historic Preservation Act Section 106 Consultation – Results of Identification and Evaluation (Docket Number: 72-026) ML24200A2052024-06-0707 June 2024 Fws to NRC, List of Threatened and Endangered Species That May Occur in Your Proposed Project Location or May Be Affected by Your Proposed Project for Diablo Canyon License Renewal ML24099A2192024-05-29029 May 2024 Plants, Units 1 and 2 Issuance of Amendment Nos. 245 and 247 Revision to TSs to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b ML24117A0132024-05-20020 May 2024 Letter to Paula Gerfen-Diablo Canyon Units 1 and 2-Regulatory Audit Regarding Severe Accident Mitigation Alternatives for the License Renewal Application DCL-24-052, Responses to NRC Requests for Additional Information on the Diablo Canyon Power Plant License Renewal Application Environmental Report2024-05-16016 May 2024 Responses to NRC Requests for Additional Information on the Diablo Canyon Power Plant License Renewal Application Environmental Report DCL-24-051, One Hundred Eighty Day Steam Generator Report for Twenty-Fourth Refueling Outage2024-05-0808 May 2024 One Hundred Eighty Day Steam Generator Report for Twenty-Fourth Refueling Outage ML24127A2042024-05-0202 May 2024 02May2024 Ltr - California Coastal Commission to Pg&E, Coastal Development Permit Needed for Pg&E’S Proposed Relicensing of Diablo Canyon Nuclear Power Plant DCL-24-049, 2023 Annual Radiological Environmental Operating Report2024-05-0101 May 2024 2023 Annual Radiological Environmental Operating Report DCL-24-047, 2023 Annual Non-radiological Environmental Operating Report2024-05-0101 May 2024 2023 Annual Non-radiological Environmental Operating Report DCL-24-048, O CFR 50.59 and 1 O CFR 72.48 Summary Report for the Period of January 1, 2022, Through December 31, 20232024-04-30030 April 2024 O CFR 50.59 and 1 O CFR 72.48 Summary Report for the Period of January 1, 2022, Through December 31, 2023 L-24-004, Independent Spent Fuel Storage Installation - Responses to NRC Requests for Additional Information on the Diablo Canyon Independent Spent Fuel Storage Installation License Renewal Application (Cac/Epid 001028/L-2022-RNW-0007)2024-04-30030 April 2024 Independent Spent Fuel Storage Installation - Responses to NRC Requests for Additional Information on the Diablo Canyon Independent Spent Fuel Storage Installation License Renewal Application (Cac/Epid 001028/L-2022-RNW-0007) DCL-24-027, 2023 Annual Radioactive Effluent Release Report2024-04-28028 April 2024 2023 Annual Radioactive Effluent Release Report DCL-24-045, Annual Report of Occupational Radiation Exposure for 20232024-04-24024 April 2024 Annual Report of Occupational Radiation Exposure for 2023 IR 05000275/20240012024-04-23023 April 2024 Integrated Inspection Report 05000275/2024001 and 05000323/2024001 ML24114A2032024-04-22022 April 2024 Request for Information for EP Program and Performance Indicator Verification Inspection (Wolf Creek Nuclear Generating Station) Inspection Report 05000482/2024003 ML24106A2892024-04-18018 April 2024 Letter to Paula Gerfen - Diablo Canyon Units 1 and 2 - Summary of March 2024 Audit Regarding the Environmental Review of the License Renewal Application ML24106A2882024-04-18018 April 2024 License Renewal Application Environmental Review RCIs and RAIs DCL-24-042, Response to NRC Regulatory Issue Summary 2024-01, Preparation and Scheduling of Operator Licensing Examinations2024-04-17017 April 2024 Response to NRC Regulatory Issue Summary 2024-01, Preparation and Scheduling of Operator Licensing Examinations ML24108A1122024-04-15015 April 2024 License Amendment Request 24-02 Request for Approval of DCPP Early Warning System to Meet 10 CFR 73.55(i)(2) and 10 CFR 73.55(e)(9)(vi)(A) DCL-24-023, Revised Certification of Permanent Cessation of Power Operations2024-04-0202 April 2024 Revised Certification of Permanent Cessation of Power Operations DCL-24-022, Notification of Changes to Decommissioning Schedule2024-04-0202 April 2024 Notification of Changes to Decommissioning Schedule DCL-24-031, Decommissioning Funding Report2024-03-27027 March 2024 Decommissioning Funding Report DCL-24-032, 2024 Annual Statement of Insurance for Pacific Gas and Electric Company’S Diablo Canyon Power Plant2024-03-27027 March 2024 2024 Annual Statement of Insurance for Pacific Gas and Electric Company’S Diablo Canyon Power Plant ML24082A2592024-03-25025 March 2024 Notice of Enforcement Discretion for Diablo Canyon Power Plant, Unit 2 (EPID L-2024-LLD-0002) - March 25, 2024 ML24081A0462024-03-22022 March 2024 Audit Summary in Support of the License Amendment Request to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4b DCL-24-028, Request for Enforcement Discretion Regarding Compliance with Technical Specification 3.0.3, Limiting Condition for Operation Applicability2024-03-21021 March 2024 Request for Enforcement Discretion Regarding Compliance with Technical Specification 3.0.3, Limiting Condition for Operation Applicability ML24081A4052024-03-21021 March 2024 Request for Enforcement Discretion Regarding Compliance with Technical Specification 3.0.3, Limiting Condition for Operation Applicability ML24065A1312024-03-20020 March 2024 ISFSI Renewal RAI Transmittal Letter IR 05000275/20244032024-03-12012 March 2024 Cyber Security Inspection Report 05000275/2024403 and 05000323/2024403 (Cover Letter) ML24065A3662024-03-0404 March 2024 Notification of Site Inspection for License Renewal and Request for Information Inspection (05000323/2024011) ML24071A1742024-03-0404 March 2024 Email - (External_Sender) Shutdown Petition to NRC Commissioners DCL-24-018, License Amendment Request 24-01 Revision to Technical Specification 5.6.6, Reactor Coolant System (RCS) Pressure and Temperature Limits Report (PTLR)2024-02-28028 February 2024 License Amendment Request 24-01 Revision to Technical Specification 5.6.6, Reactor Coolant System (RCS) Pressure and Temperature Limits Report (PTLR) IR 05000275/20230062024-02-28028 February 2024 Annual Assessment Letter for Diablo Canyon Power Plant, Units 1 and 2 (Report 05000275/2023006 and 05000323/2023006) ML24056A0022024-02-27027 February 2024 – License Renewal Regulatory Audit Regarding the Environmental Review of the License Renewal Application DCL-2024-507, 2023 Annual Report on Discharge Self-Monitoring2024-02-27027 February 2024 2023 Annual Report on Discharge Self-Monitoring ML24058A2552024-02-22022 February 2024 Formal Acceptance from Sy Chumash Re Regarding Consultation on the DC NPP ML24058A2562024-02-22022 February 2024 Santa Ynez Band or Chumash Tribe - Consultation Request Diablo Canyon NPP Units 1 and 2 2024-08-08
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Pacific Gas and Electric Company-September 10, 2014 PG&E Letter DCL-14-081 Edward D. Halpin Diablo Canyon Power Plant Senior Vice President Mail Code 104/6 Nuclear Generation
& Chief Nuclear Officer P. 0. Box 56 Avila Beach, CA 93424 805.545.4100 E-Mail: ElH8@pge.com U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Diablo Canyon Units 1 and 2 Docket No. 50-275, OL-DPR-80 Docket No. 50-323, OL-DPR-82 Central Coastal California Seismic Imaging Proiect, Shoreline Fault Commitment
References:
(1) PG&E Letter DCL-12-108, 'Withdrawal of License Amendment Request 11-05,'Evaluation of Process for New Seismic Information and Clarifying the Diablo Canyon Power Plant Safe Shutdown Earthquake,'" dated October 25, 2012 (2) 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 (3) PG&E Letter, "Report on the Analysis of the Shoreline Fault Zone, Central Coastal California," dated January 7, 2011 Dear Commissioners and Staff;Pacific Gas and Electric Company (PG&E) submits the enclosed report, Central Coastal California Seismic Imaging Project (CCCSIP).PG&E has completed its advanced seismic studies to further document the seismic characteristics of the fault zones in the region surrounding the Diablo Canyon Power Plant (DCPP) in San Luis Obispo County. These studies have given PG&E, as well as scientists and regulators, an unprecedented view into the earth's crust that significantly and fundamentally increases understanding of the seismic characteristics near the DCPP.PG&E performed these studies following the recommendation of the California Energy Commission (CEC) in a report issued in response to state legislation (Assembly Bill 1632, or AB 1632). AB 1632 (Blakeslee, Chapter 722, Statutes of 2006) directed the CEC to assess the potential vulnerability of California's largest baseload power-generation facilities (1,700 megawatts or greater) to a major A member of the STARS (Strategic Teaming and Resource Sharing) Alliance 4()01ý_ 1 Z4 Callaway -Comanche Peak
- Wolf Creek Document Control Desk PG&E Letter DCL-14-081 September 10, 2014 Page 2 disruption due to a seismic event or plant aging. Upon completing that assessment, the CEC issued a report containing the recommendation that PG&E perform additional seismic studies to supplement the original and ongoing seismic studies performed as part of PG&E's Long Term Seismic Program (LTSP), and that those studies be conducted using advanced technologies such as three-dimensional (3D)seismic-reflection mapping.The activities that PG&E performed in accordance with the CEC recommendation were part of the CCCSIP. The CCCSIP Report consists of a technical summary, an introduction, and 12 detailed technical reports of key regional seismic features and hazards. It also contains plots that illustrate the updated deterministic ground-motion values resulting from a seismic event on the key studied faults near the DCPP. In all cases, the research confirmed previous analyses that the plant and its safety related components are designed to withstand, and perform their safety functions during and after, a major seismic event.PG&E Letter DCL-12-108 (Reference
- 1) included the following regulatory commitment, "If during PG&E's ongoing collection of seismic data, new faults are discovered or information is uncovered that would suggest the Shoreline Fault is more capable than currently believed, PG&E will provide the NRC with an interim evaluation that describes the actions to be taken or planned to address the higher seismic hazard relative to the design basis, as appropriate, prior to completion of the evaluations requested in the NRC Staffs March 12, 2012, request for information (Reference 2)." The additional offshore seismic studies revealed that the Shoreline fault is longer by extending farther south than in the Shoreline Fault report (Reference 3), and therefore, more capable as described in the enclosure.
PG&E concluded that the ground motions from updated shoreline fault and other regional faults remain less than the 1977 Hosgri Design ground motions, for which the plant was evaluated and demonstrated to have reasonable assurance of safety. This interim evaluation is consistent with the conclusions of Research Information Letter 12-01, "Confirmatory Analysis of Seismic Hazard at the Diablo Canyon Power Plant from the Shoreline Fault Zone," dated September 2012.PG&E has submitted these reports to the U.S. Nuclear Regulatory Commission (NRC) and to the California Public Utilities Commission's (CPUC) Independent Peer Review Panel (IPRP). The IPRP provided valuable input during the project, shaping the scope and focus of the seismic studies. PG&E expects to receive valuable feedback from the NRC and IPRP on these study results and will respond to that feedback and/or comments in a timely manner.Additionally, these study results will support a new NRC-mandated seismic hazard risk assessment for the DCPP that is required of all nuclear power plants in the United States. PG&E is using the review process required by the NRC, known as A member of the STARS (Strategic Teaming and Resource Sharing) AlLiance Callaway
- Comanche Peak -Diablo Canyon
- Wolf Creek Document Control Desk PG&E Letter DCL-14-081 September 10, 2014 Page 3 the Senior Seismic Hazard Analysis Committee (SSHAC) process, to incorporate and evaluate existing and new seismic information to update the seismic hazard analysis for DCPP. The SSHAC process is a peer-reviewed evaluation that involves the use of independent experts. The seismic hazard analysis update is due in March 2015.In addition to the SSHAC process, PG&E is committed, through the LTSP, to continually studying advances in geologic/seismic knowledge of the area and assessing the implications on the seismic hazard analysis of DCPP, consistent with the process described in NRC Staffs March 12, 2012, request for information (Reference 2). That commitment extends beyond March of 2015 and will remain in effect throughout the operational life of the DCPP.Finally, PG&E is making its studies widely available to the public, government, and academic communities.
The final updated ground-motion values will be shared with local governments and other key infrastructure operators so that those entities may evaluate the designs of their facilities against the updated seismic hazard and their emergency plans. The study data will also be shared with interested stakeholders, including the scientific and academic communities, once the peer review process is complete.
The report is being distributed in hard copy or by digital video disk (DVD)as appropriate.
PG&E makes no new or revised regulatory commitments (as defined by NEI 99-04)in this report.Sincerely, Edward D. Halpin Senior Vice President Nuclear Generation and Chief Nuclear Officer mjrm/4557/50652361 Enclosure cc: Diablo Distribution cc/enc (DVD): Marc L. Dapas, NRC Region IV Administrator Thomas R. Hipschman, NRC Senior Resident Inspector Balwant K. Singal, NRC Project Manager CPUC IPRP INPO A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway -Comanche Peak
- Wolf Creek Enclosure PG&E Letter DCL-14-081 Central Coastal California Seismic Imaging Project (Hard Copy Report and/or Report on Digital Video Disk (DVD))