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MONTHYEARML1212300352012-09-19019 September 2012
Research Information Letter RIL-12-01 - Confirmatory Analysis of Seismic Hazard at the Diablo Canyon Power Plant from the Shoreline Fault Zone
Project stage: Request
ML12297A1992012-11-19019 November 2012
Revised Response to Task Interface Agreement Seismic Qualification Current Licensing and Design Basis, TIA 2011-010 (TIA 2012-012)
Project stage: Other
2012-11-19
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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
[Table view] |
Text
November 19, 2012 MEMORANDUM TO: Kriss M. Kennedy, Director Division of Reactor Projects Region IV FROM: Sher Bahadur, Deputy Director /RA David Pelton for/
Division of Policy and Rulemaking Office of Nuclear Reactor Regulation
SUBJECT:
REVISED RESPONSE TO TASK INTERFACE AGREEMENT - DIABLO CANYON SEISMIC QUALIFICATION CURRENT LICENSING AND DESIGN BASIS, TIA 2011-010 (TIA 2012-012) (TAC NOS. ME9840 AND ME9841)
The purpose of this memorandum is to update the guidance found in Task Interface Agreement (TIA) 2011-010 dated August 1, 2011 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML112130655). TIA 2011-010 documents the Office of Nuclear Reactor Regulations (NRR) concurrence with Region IVs position that new seismic information developed by the Pacific Gas and Electric (PG&E, the licensee) is required to be evaluated against all three of the seismic design basis earthquakes at Diablo Canyon Power Plant (DCPP)1. After the issuance of TIA 2011-010, two additional documents have been issued that essentially supersede the guidance found in TIA 2011-010. These documents are:
- U.S. Nuclear Regulatory Commission (NRC) request for information dated March 12, 2012, that was sent to all nuclear power plant licensees pursuant to paragraph 50.54(f) of Title 10 of the Code of Federal Regulations (10 CFR)
(ADAMS Accession No. ML12053A340) requesting a reevaluation of seismic hazards .
- NRC letter to PG&E dated October 12, 2012 (ADAMS Accession No. ML120730106), that informed the licensee of the results of the review of the Shoreline fault, and placed the NRCs review of the Shoreline fault into context with the action for all nuclear power plant licensees to perform seismic reevaluations in accordance with the request for information dated March 12, 2012.
The NRC staffs current position regarding expectations for addressing new seismic information is documented in the request for information dated March 12, 2012, and the NRC letter to the licensee dated October 12, 2012. The staffs position that supersedes the guidance found in TIA 2011-010 is as follows:
1 The three DCPP design basis earthquakes are the Design Earthquake (DE), the Double Design Earthquake (DDE), and the Hosgri Earthquake (HE).
K. Kennedy
- In its letter dated October 12, 2012, the NRC staff noted that new information regarding the Shoreline fault can be found in PG&Es letter dated January 7, 2011 (ADAMS Accession No. ML110140431), and that the Shoreline fault is evaluated by the NRC in Research Information Letter 12-01, Confirmatory Analysis of Seismic Hazard at the Diablo Canyon Power Plant from the Shoreline Fault Zone (ADAMS Accession No. ML121230035). The NRCs letter dated October 12, 2012, states that the Shoreline scenario should be considered as a lesser included case under the Hosgri evaluation and the licensee should update the Final Safety Analysis Report Update, as necessary, to include the Shoreline scenario in accordance with the requirements of 10 CFR 50.71(e).
- The NRCs letter dated October 12, 2012, provides guidance that for purposes of the response to the request for information dated March 12, 2012, the staff expects PG&E to use the DDE for comparison with the reevaluated seismic hazard ground motion response spectrum (GMRS) that is being developed to respond to the request for information. The NRCs letter dated October 12, 2012, notes that the request for information provides guidance for licensees to follow if the GMRS exceeds the safe shutdown earthquake or DDE for DCPP.
- The NRCs letter dated October 12, 2012, and the request for information dated March 12, 2012, provide guidance for assessing new seismic information and what PG&E is expected to do in the event that it becomes apparent that the new seismic information will lead to a GMRS that is higher than the DDE.
Longer term, it should be noted that the NRC staff plans to address Recommendation 2.2 of the Japan Lessons Learned Near-Term Task Force (NTTF), which states:
Initiate rulemaking to require licensees to confirm seismic hazards and flooding hazards every 10 years and address any new and significant information. If necessary, update the design basis for systems, structures, and components important to safety to protect against the updated hazards.
Therefore, expectations related to collection and assessment of new seismic hazards information would likely be addressed as part of this response.
Based on the above, the NRC staff considers that the guidance found in TIA 2011-10 has been superseded by the guidance for assessing new seismic information at DCPP found in the NRCs letter dated October 12, 2012, and the request for information dated March 12, 2012.
Docket Nos. 50-275 and 50-323
ML110140431), and that the Shoreline fault is evaluated by the NRC in Research Information Letter 12-01, Confirmatory Analysis of Seismic Hazard at the Diablo Canyon Power Plant from the Shoreline Fault Zone (ADAMS Accession No. ML121230035). The NRCs letter dated October 12, 2012, states that the Shoreline scenario should be considered as a lesser included case under the Hosgri evaluation and the licensee should update the Final Safety Analysis Report Update, as necessary, to include the Shoreline scenario in accordance with the requirements of 10 CFR 50.71(e).
- The NRCs letter dated October 12, 2012, provides guidance that for purposes of the response to the request for information dated March 12, 2012, the staff expects PG&E to use the DDE for comparison with the reevaluated seismic hazard ground motion response spectrum (GMRS) that is being developed to respond to the request for information. The NRCs letter dated October 12, 2012, notes that the request for information provides guidance for licensees to follow if the GMRS exceeds the safe shutdown earthquake or DDE for DCPP.
- The NRCs letter dated October 12, 2012, and the request for information dated March 12, 2012, provide guidance for assessing new seismic information and what PG&E is expected to do in the event that it becomes apparent that the new seismic information will lead to a GMRS that is higher than the DDE.
Longer term, it should be noted that the NRC staff plans to address Recommendation 2.2 of the Japan Lessons Learned Near-Term Task Force (NTTF), which states:
Initiate rulemaking to require licensees to confirm seismic hazards and flooding hazards every 10 years and address any new and significant information. If necessary, update the design basis for systems, structures, and components important to safety to protect against the updated hazards.
Therefore, expectations related to collection and assessment of new seismic hazards information would likely be addressed as part of this response.
Based on the above, the NRC staff considers that the guidance found in TIA 2011-10 has been superseded by the guidance for assessing new seismic information at DCPP found in the NRCs letter dated October 12, 2012, and the request for information dated March 12, 2012.
Docket Nos. 50-275 and 50-323 DISTRIBUTION:
See next page ADAMS Accession No.: ML12297A199 *via email NRR-106 OFFICE NRR/DORL/LPL4/PM NRR/DORL/LPL4/LA NRR/DE/EMCB/BC NRO/DSEA NAME JSebrosky JBurkhardt MMurphy CMunson DATE 11/19/2012 10/24/2012 10/25/2012 10/31/2012 OFFICE NRR/DE NRR/JLD/PMB/BC RIV/DRP/RPB-B/BC NRR/DPR/PLPB NAME KManoly MMitchell NOKeefe* SStuchell*
DATE 10/25/2012 10/26/2012 11/15/2012 10/25/2012 OFFICE NRR/DORL/LPL4/BC RIV/DRP NRR/DPR/DD NAME MMarkley KKennedy* (DPelton for) SBahadur DATE 11/19/2012 11/15/2012 11/19/2012 MEMORANDUM TO: Kriss M. Kennedy dated November 19, 2012
SUBJECT:
REVISED RESPONSE TO TASK INTERFACE AGREEMENT - DIABLO CANYON SEISMIC QUALIFICATION CURRENT LICENSING AND DESIGN BASIS, TIA 2011-010 (TIA 2012-012)
DISTRIBUTION:
PUBLIC LPLIV Reading File RidsAcrsAcnw_MailCTR Resource RidsNroDsea Resource RidsNroDseaRgs2 Resource RidsNrrDe Resource RidsNrrDeEmcb Resource RidsNrrDorlLpl4 Resource RidsNrrDpr Resource RidsNrrDprPspb Resource RidsNrrLAJBurkhardt Resource RidsNrrPMDiabloCanyon Resource RidsOgcRp Resource RidsResDe Resource RidsRgn4MailCenter Resource RidsNroMailCenter Resource RidsResOd Resource HCruz, NRR/DPR/PLPB
