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MONTHYEARML15070A6082015-03-11011 March 2015 Response to NRC Request for Info. Pursuant to 10 CFR 50.54(f) Seismic Aspects of Recommendation 2.1 of Near-Term Task Force Review of Insights from Fukushima Dai-ichi Accident: Seismic Hazard Screening Report. Part 2 of 2 Project stage: Request ML15117A0692015-04-28028 April 2015 Pacific Gas and Electric Co. April 28, 2015, Public Meeting Slides for Diablo Canyon Seismic Hazard Reevaluation Project stage: Request ML15117A2262015-04-28028 April 2015 Nuclear Regulatory Commission April 28, 2015, Public Meeting Slides for Diablo Canyon Seismic Hazard Reevaluation Project stage: Request ML15134A2582015-05-12012 May 2015 NRR E-mail Capture - Written Concerns - April 28th, 2015 Webcast Meeting with PG&E Project stage: Request ML15125A1862015-05-27027 May 2015 April 28, 2015, Summary of Category 1 Public Meeting with Pacific Gas and Electric Company to Discuss Diablo Canyon'S Seismic Hazard Reevaluation Associated with Implementation of Japan Lessons-Learned Near-Term Task Force Recommendation 2. Project stage: Meeting DCL-15-138, Seismic Data Request from NRC - Southwest Research Institute2015-12-0202 December 2015 Seismic Data Request from NRC - Southwest Research Institute Project stage: Request ML15345A0212016-01-11011 January 2016 Audit Report Regarding Pacific Gas and Electric Company'S Seismic Source Models Related to Near-Term Task Force Recommendation 2.1 - Seismic for Diablo Canyon Power Plant, Unit Nos. 1 and 2 Project stage: Other ML15345A0932016-01-11011 January 2016 Audit Report Regarding Pacific Gas and Electric Company'S Seismic Site Response Related to the Near-Term Task Force Recommendation 2.1 - Seismic for: Diablo Canyon Power Plant, Units 1 and 2 Project stage: Other ML15364A5302016-01-28028 January 2016 Preliminary Assessment of the Reevaluated Seismic Hazard Submitted in Response to Title 10 of the Code of Federal Regulations 50.54(f) Information Request Project stage: Other ML16341C0572016-12-21021 December 2016 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 Project stage: Other 2015-05-12
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Category:Meeting Summary
MONTHYEARML23268A4072023-09-27027 September 2023 Summary of September 19, 2023, Closed Public Meeting with Pacific Gas and Electric Company Regarding Alternative Security Measures for Early Warning System License Amendment Request for Diablo Canyon Nuclear Power Plant, Units 1 and 2 ML23265A1902023-09-26026 September 2023 Meeting Summary: September 13, 2023 Diablo Canyon, Units 1 and 2 License Renewal Application Pre-Application Meeting ML23143A2262023-06-0101 June 2023 May 3, 2023, Summary of Public Meeting to Discuss the End of Cycle Assessment and Pre-Submittal License Renewal Process Overview for Diablo Canyon Power Plant, Units 1 and 2 ML22272A5072022-09-29029 September 2022 Summary of September 27, 2022, Closed Meeting with Pacific Gas and Electric Company Regarding Planned Security Plan Changes for Diablo Canyon Nuclear Power Plant, Units 1 and 2 ML22147A0932022-06-0606 June 2022 2021 Annual Assessment Public Meeting Summary ML22126A0162022-05-0909 May 2022 Summary of April 27, 2022, Closed Teleconference with Pacific Gas and Electric Company Regarding Alternative Security Measures for Early Warning System License Amendment Request for Diablo Canyon Nuclear Power Plant, Units 1 and 2 ML21246A0202021-09-0808 September 2021 Summary of August 30, 2021, Pre-Submittal Teleconference with Pacific Gas and Electric Company Regarding a Post-Shutdown Emergency Plan License Amendment Request for Diablo Canyon Nuclear Power Plant, Units 1 and 2 ML21140A3892021-05-24024 May 2021 Riv Column 1 EOC 2020 Public Meeting Summary ML20332A1802020-12-0101 December 2020 Summary of November 24, 2020, Pre-Submittal Teleconference with Pacific Gas and Electric Company a Permanently Defueled Technical Specification License Amendment Request ML20231A6522020-08-24024 August 2020 Summary of Teleconference with Pacific Gas & Electric Company Regarding an Exigent Amendment Request to Modify Diablo Canyon Power Plant, Units 1 & 2, Technical Specification 3.7.5, Auxiliary Feedwater (AFW) System EPID L-2020-LLA-017 ML20189A2832020-07-0707 July 2020 Summary of Region IV Annual Assessment Public Meeting ML19318F5272019-11-15015 November 2019 Summary of the August 27, 2019, Public Meeting Near the Diablo Canyon Nuclear Power Plant Regarding the Establishment and Operation of Community Advisory Boards ML19196A0742019-07-22022 July 2019 Summary of Meeting with Pacific Gas and Electric Company Regarding Forthcoming Activities Associated with Diablo Canyon Nuclear Power Plant, Units 1 and 2 Planned Decommissioning ML19064B2652019-03-14014 March 2019 Summary of February 28, 2019, Public Meeting with Pacific Gas and Electric Company to Discuss the Proposed Relief Request Concerning Reactor Vessel Internal Visual Examination for the Diablo Canyon Nuclear Power Plant, Units 1 & 2 ML18348A4202018-12-31031 December 2018 Summary of Meeting with Pacific Gas & Electric Co. to Discuss Exemption Request to Withdraw Funds from the Nuclear Decommissioning Trusts to Fund Decommissioning Planning Activities at Diablo Canyon Nuclear Power Plant ML18207A7332018-08-10010 August 2018 Summary of Pre-Licensing Meeting with PG&E Co. to Discuss the Proposed LAR to Implement WCAP-16996-A, Revision 1, Realistic LOCA Evaluation Methodology Applied to the Full Spectrum of Break Sizes at Diablo Canyon ML17198A6032017-07-17017 July 2017 Summary of Annual Assessment Meeting Regarding Diablo Canyon Power Plant 2016 Performance ML16190A1782016-07-0808 July 2016 Summary of Annual Assessment Town Hall Meeting and Public Outreach Regarding Diablo Canyon Power Plant 2015 Performance ML16011A2042016-01-14014 January 2016 Summary of Conference Call on January 7, 2016, Between the U.S. NRC and Pacific Gas and Electric Co. Concerning the Responses to RAI for the Review of the Diablo Canyon Power Plant, Units 1 and 2, License Renewal Application (CAC Nos. MF401 ML15343A1272015-12-24024 December 2015 Summary of Meeting with Pacific Gas and Electric to Discuss Diablo Canyon, Units 1 and 2 Amendment Request to Revise UFSAR for Beacon Power Distribution Monitoring System Methodology and TS 5.6.5 (COLR) Paragon and Nexus Methodologies ML15348A1702015-12-17017 December 2015 Summary of Telephone Conference Call Held Between NRC and Pacific Gas and Electric Co., Concerning the RAI Responses Pertaining to the Diablo Canyon Power Plant LRA Environmental Review ML15280A2842015-10-20020 October 2015 Summary of Meeting with Pacific Gas & Electric to Discuss Diablo Canyon, Units 1 and 2 Request to Adopt National Fire Protection Association NFPA 805, Performance-Based Standard for Fire Protection for LWR Generating Plants (2001 Edition), ML15279A4222015-10-0909 October 2015 Summary of 8/25/15 Meeting with Pacific Gas and Electric to Discuss Diablo Canyon Units 1 and 2 Amendment Request to Adopt Risk-Informed Completion Times, TSTF-505, Revision 1, Provide Risk-Informed Extended Completion Times-RITSTF Initiati ML15275A0942015-10-0707 October 2015 Summary of the Severe Accident Mitigation Alternatives Site Audit Related to the Diablo Canyon Power Plant, Units 1 and 2 License Renewal Review ML15275A1302015-10-0707 October 2015 Summary of the Site Audit Related to the Diablo Canyon Power Plant, Units 1 and 2 License Renewal Environmental Review ML15233A0062015-09-10010 September 2015 Summary of Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML15233A0052015-09-0909 September 2015 Summary of Meeting with Pacific Gas and Electric to Discuss Diablo Canyon, Units 1 & 2 License Amendment Request to Adopt Risk-Informed Completion Times, TSTF-505, Revision 1, Provide Risk-Informed Extended Completion Times-RITSTF. Initiati ML15233A4912015-09-0101 September 2015 August 5, 2015, Public Scoping Meetings for the Environmental Review of the Diablo Canyon Power Plant, Units 1 and 2 License Renewal Application ML15209A9442015-07-28028 July 2015 June 24, 2015, Summary of Annual Assessment Meeting with Pacific Gas and Electric and Public Open House Regarding Diablo Canyon Power Plant 2014 Performance ML15125A1862015-05-27027 May 2015 April 28, 2015, Summary of Category 1 Public Meeting with Pacific Gas and Electric Company to Discuss Diablo Canyon'S Seismic Hazard Reevaluation Associated with Implementation of Japan Lessons-Learned Near-Term Task Force Recommendation 2. ML15134A2572015-05-18018 May 2015 5/7/15 Summary of Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML15092A0792015-04-16016 April 2015 July 14-17, 2014 - Summary of Diablo Canyon, Units 1 and 2, Audit to Adopt National Fire Protection Association NFPA 805, Performance-Based Standard for Fire Protection for LWR Generating Plants (2001 Edition) ML15069A0952015-03-24024 March 2015 Summary of Telephone Conference Call Held on March 4, 2015 Between the U.S. Nuclear Regulatory Commission and Pacific Gas and Electric Company Concerning the Diablo Canyon Power Plant, Units 1 and 2, License Renewal Application ML15043A1992015-02-19019 February 2015 2/3/2015 Summary of Meeting with Pacific Gas and Electric Regarding Presubmittal Discussion on Alternate Source Term License Amendment Request for Diablo Canyon Power Plant, Units 1 and 2 ML15037A2482015-02-0505 February 2015 Summary of Regulatory Conference to Discuss Safety Significance of Diablo Canyon Power Plant Protective Action Recommendations for Areas of the Ocean Finding ML14350A2712014-12-22022 December 2014 Summary of 12/11/14 Preapplication Meeting with Pacific Gas and Electric Company to Discuss License Amendment Request to Support Installation of 500 Kilovolt Output Generator Breakers at Diablo Canyon, Units 1 and 2 ML14029A4502014-12-10010 December 2014 Summary of 12/18/13 Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML14295A7332014-11-17017 November 2014 9/24/14 Summary of Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML14197A3522014-07-22022 July 2014 7/9/14 Summary of Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML14157A0912014-06-17017 June 2014 Summary of 5/21/14 Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML14155A3742014-06-0404 June 2014 May 22, 2014, Summary of Annual Assessment Meeting with Pacific Gas and Electric Regarding Diablo Canyon Power Plant 2013 Performance ML14113A4932014-05-0606 May 2014 Summary of Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML14113A4222014-04-23023 April 2014 Public Meeting with Pacific Gas & Electric (Pg&E)To Discuss the Operating Performance for Diablo Canyon Power Plant for the Period January 1 - December 31, 2013 ML13329A4172013-12-30030 December 2013 Summary of Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13354C0912013-12-23023 December 2013 Summary of Annual Assessment Meeting with Pacific Gas & Electric Re Diablo Canyon Nuclear Power Plant 2012 Performance ML13282A3822013-11-0707 November 2013 10/2/2013 Summary of Pre-Application Meeting with Pacific Gas and Electric Company to Discuss Upcoming Structural Weld Overlay Relief Request to Use an Alternative to Disposition Detected Laminar Indications at Diablo Canyon, Unit 2 ML13269A0042013-10-0808 October 2013 9/24/13 Summary of Pre-Application Meeting to Discuss License Amendment Request for Technical Specification 3.8.1 Diesel Generator Surveillance Requirements at Diablo Canyon, Units 1 and 2 ML13270A2922013-10-0202 October 2013 Summary of 9/26/13 Meeting to Discuss Amendment Request to Adopt Technical Specifications Task Force TSTF-505, Provide Risk-Informed Extended Completion Times, RITSTF Initiative 4B at Diablo Canyon, Units 1 and 2 ML13269A0072013-10-0101 October 2013 Summary of 9/25/13 Pre-Application Meeting to Discuss Emergency Core Cooling System Evaluations for License Amendment Request at Diablo Canyon, Units 1 and 2 ML13266A0882013-09-30030 September 2013 9/18/13 - Summary of Closed Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 2023-09-27
[Table view] Category:Memoranda
MONTHYEARML23265A1902023-09-26026 September 2023 Meeting Summary: September 13, 2023 Diablo Canyon, Units 1 and 2 License Renewal Application Pre-Application Meeting ML23143A2262023-06-0101 June 2023 May 3, 2023, Summary of Public Meeting to Discuss the End of Cycle Assessment and Pre-Submittal License Renewal Process Overview for Diablo Canyon Power Plant, Units 1 and 2 ML23046A0292023-02-23023 February 2023 Timely Renewal Exemption 5 Day Memorandum ML22147A0932022-06-0606 June 2022 2021 Annual Assessment Public Meeting Summary ML22131A1592022-05-11011 May 2022 Reply to the Nrc'S Response to the Office of the Inspector General'S (OIG) Event Inquiry Into the Nrc'S Oversight of the Auxiliary Feedwater System at Diablo Canyon Nuclear Power Plant, OIG Case No. 20-025 ML22108A1672022-05-0303 May 2022 Staff Assessment of OIG Event Inquiry Into the Nrc'S Oversight AFW at Diablo Canyon (OIG Case No. 20-025) ML22109A1792022-05-0303 May 2022 Response OIG Special Inquiry Into Nrc'S Oversight AFW at Diablo Canyon (OIG Case No. 20-025) ML21146A1852021-06-28028 June 2021 DC RFI 2021401 ML21146A185 ML21140A3892021-05-24024 May 2021 Riv Column 1 EOC 2020 Public Meeting Summary ML21060B1822021-03-0101 March 2021 Memorandum: 1-26-21 Diablo Canyon Renewal Pre-Application Meeting Summary ML19318F5272019-11-15015 November 2019 Summary of the August 27, 2019, Public Meeting Near the Diablo Canyon Nuclear Power Plant Regarding the Establishment and Operation of Community Advisory Boards ML19182A3562019-07-23023 July 2019 Quarterly Report on the Status of Public Petitions Under Title 10 of the Code of Federal Regulations, Section 2.206 - April 1 to June 30, 2019 ML18298A0762018-10-26026 October 2018 Notice of Forthcoming Closed Meeting with Pacific Gas and Electric Company to Discuss Security-Related Information for Diablo Canyon Power Plant, Units 1 and 2 ML18173A0082018-06-20020 June 2018 Cancelling Numerous Inspection Report Numbers ML18131A0482018-05-11011 May 2018 Memorandum to File Environmental Assessment and Finding of No Significant Impact for Pacific Gas and Electric Company'S Decommissioning Funding Plan Submitted in Accordance with 10 CFR 72.30(b) for the Diablo Canyon Independent Spent Fuel S ML16119A5002016-04-29029 April 2016 Notice of Forthcoming Closed Meeting with Pacific Gas & Electric Company to Discuss Proposed Change to Defensive Strategy and 10 CFR 50.54(p) Documentation for Reduction in Minimum Staffing Requirements at Diablo Canyon ML16088A2042016-03-28028 March 2016 Memo T Bowers from s Ruffin, Technical Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations W/ Encl 2 (Template) ML16088A2052016-03-28028 March 2016 Enclosure 1 - (72.30 DFP Reviews to Be Completed 2015) - Memo T Bowers from s Ruffin, Technial Assistance Requests - Review 2015 Tri-Annual Decommissioning Funding Plans for Multiple Independent Spent Fuel Storage Installations ML16029A2322016-03-16016 March 2016 LTR-15-0337-1 - Diablo Canyon Power Plant, Units 1 and 2 - Closure of 10 CFR 2.206 Petition from Bullard High School Students (CAC Nos. MF6515 and MF6516) ML15125A1862015-05-27027 May 2015 April 28, 2015, Summary of Category 1 Public Meeting with Pacific Gas and Electric Company to Discuss Diablo Canyon'S Seismic Hazard Reevaluation Associated with Implementation of Japan Lessons-Learned Near-Term Task Force Recommendation 2. ML14344A6302014-12-15015 December 2014 Close-out letter-California Facilities Preemption Safety Evaluation ML14167A4922014-07-0303 July 2014 Summary of June 5, 2014, Conference Call to Discuss the Status of the License Renewal Application Review of the Diablo Canyon Nuclear Power Plant, Units 1 and 2 ML14022A1202014-06-23023 June 2014 Memorandum to File, Review of Revision 21 of Final Safety Analysis Report Update ML14162A4582014-06-12012 June 2014 Pacific Gas and Electric Company Diablo Canyon Power Plant Units 1 and 2, Regulatory Audit in Support of the License Amendment Request to Implement Risk-Informed, Performance-Based, Fire Protection Program as Allowed by Title 10 of the Code ML13339A4282014-04-28028 April 2014 Transmittal Memorandum for Regulatory Audit Report for the August 6, 2013 Through August 8, 2013 Cyber Security Pilot Study at Dcnpp Avila Beach, CA ML13312A6462013-11-25025 November 2013 Meeting Notice with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13290A2272013-10-18018 October 2013 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13263A1922013-09-24024 September 2013 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13260A0052013-09-18018 September 2013 10/2/13 Notice of Pre-Application Meeting with Pacific Gas and Electric Company to Discuss Upcoming Structural Weld Overlay Relief Request to Use an Alternative to Disposition Detected Laminar Indications at Diablo Canyon, Unit 2 ML13246A4162013-09-0505 September 2013 9/24/13 - Notice of Pre-Application Meeting to Discuss License Amendment Request for Technical Specification 3.8.1 Diesel Generator Surveillance Requirements at Diablo Canyon, Units 1 and 2 ML13246A4262013-09-0505 September 2013 Notice of Meeting to Discuss Amendment Request to Adopt Technical Specifications Task Force TSTF-505, Provide Risk-Informed Extended Completion Times, RITSTF Initiative 4B at Diablo Canyon, Units 1 and 2 ML13246A4072013-09-0505 September 2013 9/25/13 Notice of Forthcoming Pre-Application Meeting to Discuss Emergency Core Cooling System Evaluations for License Amendment Request at Diablo Canyon, Units 1 and 2 ML13246A2622013-09-0404 September 2013 9/18/13 Notice of Forthcoming Closed Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13179A0622013-07-0909 July 2013 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13163A0242013-06-12012 June 2013 6/26/13 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13126A0872013-05-0707 May 2013 Notice of Forthcoming 5/29/13 Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13101A2782013-04-24024 April 2013 Transmittal Memo for Regulatory Audit Report for the February 11-14, 2013 Cyber Security Pilot Study at the CS Innovation Facility in Scottsdale, Arizona ML13081A0742013-04-11011 April 2013 Summary Conference Call Between Pacific and Electric Co., and NRC Regarding Verbal Authorization of Relief Request Rep-1 U2, Revision 2 ML13074A1182013-03-15015 March 2013 3/27/13 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13052A5512013-02-21021 February 2013 Preapplication Meeting with Pacific Gas and Electric, License Amendment Request to Adopt NFPA-805 Performance-Based Standard for Fire Protection for LWR Generating Plants, at Diablo Canyon, Units 1 and 2 ML13028A2022013-02-0404 February 2013 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML13030A2462013-01-30030 January 2013 2/12/13 Forthcoming Preapplication Meeting with Pacific Gas and Electric Company to Discuss License Amendment Requests for Degraded Voltage Protection and Control Room Dose Analysis of Record at Diablo Canyon, Units 1 and 2 ML13017A1572013-01-15015 January 2013 Diablo Canyon - January Hearing File Update ML12354A5392012-12-20020 December 2012 1/24/2013 - Notice of Meeting with Pacific Gas and Electric to Discuss Diablo Canyon, Units 1 and 2 License Amendment Request to Revise FSAR Update Related to Delayed Access Offsite Power Circuit to Conform with GDC 17 ML12355A1382012-12-20020 December 2012 1/24/2013 - Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML12348A1082012-12-18018 December 2012 Notice of 1/15/2013 Preapplication Meeting with Pacific Gas and Electric Company to Discuss License Amendment Request to Revise Diesel Generator Surveillance Requirements for Diablo Canyon, Units 1 and 2 ML12338A0762012-12-0404 December 2012 Notice of Forthcoming Preapplication Meeting on 12/18/12 with Pacific Gas and Electric Company to Discuss Leak Before Break Assumptions Used in 10 CFR 50.46 Evaluation for Diablo Canyon, Units 1 and 2 ML12338A0932012-12-0404 December 2012 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 ML12297A1992012-11-19019 November 2012 Revised Response to Task Interface Agreement Seismic Qualification Current Licensing and Design Basis, TIA 2011-010 (TIA 2012-012) ML12296A1822012-10-24024 October 2012 Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Replacement of Process Protection System at Diablo Canyon Power Plant, Units 1 and 2 2023-09-26
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 May 27, 2015 LICENSEE: Pacific Gas and Electric Company FACILITY: Diablo Canyon Power Plant, Unit Nos. 1 and 2
SUBJECT:
SUMMARY
OF APRIL 28, 2015, CATEGORY 1 PUBLIC MEETING WITH PACIFIC GAS AND ELECTRIC COMPANY TO DISCUSS DIABLO CANYON POWER PLANT, UNIT NOS. 1 AND 2 SEISMIC HAZARD REEVALUATION ASSOCIATED WITH IMPLEMENTATION OF JAPAN LESSONS-LEARNED NEAR-TERM TASK FORCE RECOMMENDATION 2.1, SEISMIC On April 28, 2015 1 , the U. S. Nuclear Regulatory Commission (NRC) staff held a Category 1 public meeting with the Pacific Gas and Electric Company (PG&E, the licensee) at NRC Headquarters, Two White Flint North, 11545 Rockville Pike, Rockville, Maryland. The purpose of this meeting was to discuss Diablo Canyon Power Plant, Unit Nos. 1 and 2 (Diablo Canyon)
Seismic Hazard Reevaluation 2 associated with the implementation of Near-Term Task Force (NTTF) Recommendation 2.1: Seismic of the March 12, 2012, NRC request for information issued pursuant to Title 10 to the Code of Federal Regulations Part 50, Section 50.54(f)
(hereafter referred to as the 50.54(f) letter) 3 .
During the meeting, the NRC staff provided an overview of NTTF Recommendation 2.1 "Seismic" including specifics of the review process as it relates to the Western United States (WUS) sites4 . Additionally, PG&E representatives provided an overview of Diablo Canyon's seismic hazard reevaluation which included specific discussions of several focus areas identified by the staff and conveyed to PG&E before the public meeting 5 .
NRC staff and PG&E representatives' discussions included the following meeting highlights:
- NRC staff presented an overview of NTTF Recommendation 2.1 "Seismic" review process which included specifics on how the process would be applied to the review of the WUS submittals.
- NRC staff provided the overall schedules for Recommendation 2.1 seismic hazard and risk evaluation activities. The staff stated that the screening and prioritization results letter for the WUS reviews would be issued by mid May 2015. Specifically, for Diablo Canyon, the plant has screened-in for further risk evaluation as a higher priority group.
Subsequently, by letter dated May 13, 2015 6 , NRC placed Diablo Canyon into the 1
The meeting notice is available via the Agencywide Documents Access and Management System (ADAMS) under Accession No. ML15105A528.
2 Diablo Canyon's Seismic Hazard Reevaluation is available via ADAMS under Accession No. ML15070A607.
3 The 50.54(f) letter and Enclosure 1 are available under ADAMS Accession Nos. ML12053A340 and ML12056A047, respectively.
4 NRC's slide presentation is available via ADAMS under Accession No. ML15117A226.
5 PG&Es slide presentation is available via ADAMS under Accession No. ML15117A069.
6 The screening and prioritization results for the WUS sites can be found via ADAMS under Accession No. ML151136344.
highest priority group (Group 1) for the reevaluated seismic hazard review along with 11 other reactor sites.
- The staff described the main differences between the Central and Eastern United States (CEUS) and WUS submittals. The staff emphasized the complexity of the WUS reviews and explained the reasons for anticipating that the WUS reviews may take longer to be completed than those for the CEUS.
- PG&E provided an overview of their seismic hazard reevaluation. Specifically, PG&E responded to a series of potential issues or focus areas that the staff had identified and conveyed to PG&E before the meeting 7 . These discussions helped the staff better understand PG&E approaches and added clarity to assist in the staff's review.
- PG&E provided additional clarification on Diablo Canyon's seismic design and licensing basis. Specifically, PG&E described their Long-Term Seismic Program margin assessment in order to demonstrate additional seismic margin and ensure plant safety while the updated risk evaluations are in progress.
- PG&E stated that they are moving forward with the seismic probabilistic risk assessment update and are currently coordinating with the Electric Power Research Institute to be one of the first licensees to complete these evaluations.
- The staff asked for clarifications in areas of the seismic reevaluation report where information appeared to be in conflict or incomplete.
- The staff indicated its plan to request from PG&E free field recordings for the Parkfield and San Simeon earthquakes used to develop the ground motion model. PG&E indicated that it will work with the staff to supplement the report with this information.
Requests for additional information by the staff are also expected.
- The staff is currently evaluating PG&E's intentions not to perform the Expedited Seismic Evaluation Process and will provide a formal response.
No regulatory decisions or commitments were made during the meeting. The public was invited to observe the meeting and was given an opportunity to communicate with the NRC during the public meeting before adjourning. The NRC staff received several public comments, which were addressed during the meeting and no meeting feedback forms were received.
The staff received a comment from Dr. Gene Nelson (Physical Sciences professor at Cuesta College and Government Liaison for Californians for Green Nuclear Power) via email during the meeting. The NRC staff inadvertently missed the opportunity to acknowledge Dr. Nelson's comment during the meeting. According to Dr. Nelson, Diablo Canyon has favorable site conditions, which attenuate or dissipate earthquake energy over relatively short distances. Due to these favorable conditions, the primary earthquake forces seen by the plant would be dominated by nearby earthquake sources and energy transmitted to the plant would be 7
NRG Technical Focus Areas for Support of Public Meeting on April 28 can be found via ADAMS under Accession No. ML151138360
dominated by the small section of the earthquake rupture closest to the plant. Dr. Nelson stated that when considering the information presented at the meeting of overall plant ruggedness and the seismic hazard insights discussed above, Diablo Canyon will continue to operate safely -
with generous safety margins - during anticipated earthquakes.
The staff received a comment via email from Rochelle Becker (Alliance for Nuclear Responsibility) after the meeting on May 12, 2015 8 . Mrs. Becker summarized several concerns identified by the California Public Utilities Commission's Independent Peer Review Panel (IPRP) and emphasized the need for the staff to consider this information as part of its review process.
The IPRP has expressed concerns regarding the modeling assumption used by PG&E to characterize soil conditions beneath the plant. In response to the comment, the staff stated that it is aware and following the IPRP activities and will consider this information as part of its review of the Diablo Canyon Seismic Hazard Screening Report supporting NTTF Recommendation 2.1: Seismic.
8 Rochelle Becker's (Alliance for Nuclear Responsibility) written concerns can be found via ADAMS under Accession No. ML15134A258
Please direct any inquiries to me at 301-415-1115 or by e-mail at Nicholas.DiFrancesco@nrc.gov.
Nicholas J. DiFran sco, Senior Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323
Enclosure:
List of Attendees cc w/encl: Distribution via Listserv
List of Attendees U.S. Nuclear Regulatory Commission Public Meeting with Pacific Gas and Electric Company to discuss Diablo Canyon's seismic hazard reevaluation associated with implementation of Japan Lessons-Learned Near-Term Task Force Recommendation 2.1, Seismic April 28, 2015 Name Organization Lisa Walsh NRC/NRO Clifford Munson NRC/NRO Diane Jackson NRC/NRO Scott Stoval NRG/RES Jon Ake NRG/RES Nicholas DiFrancesco NRC/NRR Mohamed Shams NRC/NRR Vladimir Graizer NRC/NRO Frankie Vega NRC/NRR Meralis Plaza Toledo NRC/NRO Thomas Weaver NRG/RES David Heeszel NRC/NRO Alice Stieve NRC/NRO Nilesh Chokshi NRC/NRO Mike Tschiltz NEI (continues to next page)
Abbreviations:
NEI - Nuclear Energy Institute NMSS - Nuclear Material Safety and Safeguards NRO - Office of New Reactors NRR - Office of Nuclear Reactor Regulation RES - Office of Nuclear Regulatory Research Enclosure
Name Organization Steve Wyman NRC/NRR Richard Rivera-Lugo NRC/NRO Siva P. Lingam NRC/NRR Meraj Rahimi NRC/NMSS Mike Markley NRC/NRR Tom Hipschman NRC/RIV Ryan Alexander NRC/RIV Wayne Walker NRC/RIV Tom Farnholtz NRC/RIV Farhanf Ostadan Bechtel Dennis Damon NRC/NMSS Damon Maslen Friends of the Earth Norm Abrahamson PG&E Nozar Jahangir PG&E Jearl Strickland PG&E Tom Jones PG&E
ML15125A186 *concurrence via e-mail OFFICE NRR/JLD/JHMB/PM NRR/JLD/LA NRO/DSEA/RGS/BC NAME FVega Slent DJackson DATE 05/15/15 05/05/15 05/19/15 OFFICE NRR/JLD/JHMB/BC OGG (NLO) NRR/JLD/PMB/PM NAME MS hams BHarris NDiFrancesco DATE 05/27/15 05/20/15 05/27/15