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| | number = ML110590749 | | | number = ML110590749 |
| | issue date = 03/17/2011 | | | issue date = 03/17/2011 |
| | title = Summary of Telephone Conference Calls Held on February 2 and 4, 2011, Btw the Usnrc and Pacific Gas and Electric Company Concerning RAIs Related to the Diablo Canyon Nuclear Power Plant, Units 1 and 2, LRA (TAC Nos. ME2896 and ME2897) | | | title = Summary of Telephone Conference Calls Held on February 2 and 4, 2011, Btw the USNRC and Pacific Gas and Electric Company Concerning RAIs Related to the Diablo Canyon Nuclear Power Plant, Units 1 and 2, LRA (TAC Nos. ME2896 and ME2897) |
| | author name = Ferrer N B | | | author name = Ferrer N |
| | author affiliation = NRC/NRR/DLR/RPB2 | | | author affiliation = NRC/NRR/DLR/RPB2 |
| | addressee name = | | | addressee name = |
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| As stated cc w/encls: Distribution via Listserv DISTRIBUTION: | | As stated cc w/encls: Distribution via Listserv DISTRIBUTION: |
| See next page ADAMS Accession Number" . ML 110590749 OFFICE LA:DLR PM:DLRRPB2 BC:DLRRPB2 PM:DLRRPB2 NAME IKing NFerrer DWrona NFerrer DATE 02/07/2011 02/08/2011 03/14/2011 03/17/2011 OFFICIAL RECORD Letter to Pacific Gas and Electric Company from Nathaniel B. Ferrer dated March 17, 2011 | | See next page ADAMS Accession Number" . ML110590749 OFFICE LA:DLR PM:DLRRPB2 BC:DLRRPB2 PM:DLRRPB2 NAME IKing NFerrer DWrona NFerrer DATE 02/07/2011 02/08/2011 03/14/2011 03/17/2011 OFFICIAL RECORD Letter to Pacific Gas and Electric Company from Nathaniel B. Ferrer dated March 17, 2011 |
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| ==SUMMARY== | | ==SUMMARY== |
| OF TELEPHONE CONFERENCE CALLS HELD ON FEBRUARY 2 AND 4, 2011, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING REQUESTS FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. ME2896 AND ME2897) DISTRIBUTION: | | OF TELEPHONE CONFERENCE CALLS HELD ON FEBRUARY 2 AND 4, 2011, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING REQUESTS FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. ME2896 AND ME2897) DISTRIBUTION: |
| HARD COPY: DLR RtF E-MAIL: PUBLIC RidsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRpb2 Resource RidsNrrDlrRarb Resource RidsNrrDlrRapb Resource RidsNrrDlrRasb Resource RidsNrrDlrRerb Resource RidsNrrDlrRpob Resource RidsOgcMailCenter Resource NFerrer KGreen AStuyvenberg DWrona AWang MPeck, RIV TBrown, RI GMiller, RIV NO'Keefe, RIV ICouret, OPA VDricks,OPA WMaier, RIV JWeil,OCA EWilliamson, OGC SUttal,OGC RRihm, EDO}} | | HARD COPY: DLR RtF E-MAIL: PUBLIC RidsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRpb2 Resource RidsNrrDlrRarb Resource RidsNrrDlrRapb Resource RidsNrrDlrRasb Resource RidsNrrDlrRerb Resource RidsNrrDlrRpob Resource RidsOgcMailCenter Resource NFerrer KGreen AStuyvenberg DWrona AWang MPeck, RIV TBrown, RI GMiller, RIV NO'Keefe, RIV ICouret, OPA VDricks,OPA WMaier, RIV JWeil,OCA EWilliamson, OGC SUttal,OGC RRihm, EDO}} |
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MONTHYEARML1007101132010-03-10010 March 2010 Task Order No. 002 Under Delivery Order No. NRC-03-10-070 Project stage: Acceptance Review ML1007101142010-03-10010 March 2010 Task Order No. 002 Under Delivery Order No. NRC-03-10-070 Project stage: Acceptance Review ML1013201872010-05-18018 May 2010 Request for Additional Information Related to the Review of the Diablo Canyon Nuclear Power Plant, Units 1 and 2, License Renewal Application Project stage: RAI ML1013806142010-05-24024 May 2010 Request for Additional Information Related to the Review of the Diablo Canyon Nuclear Power Plant, Units 1 and 2, License Renewal Application (TAC Nos. ME2896 and ME2897) - Scoping and Screening Methodology Project stage: RAI ML1015404192010-06-14014 June 2010 Letter Request for Additional Information Related to the Review of the Diablo Canyon Nuclear Power Plant, Units 1 and 2, License Renewal Application (TAC Nos. 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ME2896 & ME2897) Project stage: RAI ML1035506802011-01-11011 January 2011 12/9/10 Summary of Telephone Conference Call Held Between NRC and PG&E Concerning Requests for Additional Information Response Related to the Diablo Canyon Nuclear Power Plant, Units 1 and 2, License Renewal Application (TAC Nos. ME2896 & M Project stage: RAI ML1101005882011-01-25025 January 2011 Summary of Telephone Conference Call Held on December 16, 2010, Between the NRC and Pacific Gas and Electric Company Concerning RAI Related to the Diablo Canyon Nuclear Power Plant, Units 1 and 2, LRA Project stage: RAI ML1101102612011-01-25025 January 2011 Summary of Telephone Conference Call Held on 12/22/2010, Between the NRC and Pacific Gas and Electric Company Concerning Requests for Additional Information Related to the Diablo Canyon Nuclear Power Plant, Units 1 and 2, LRA (TAC Nos. ME28 Project stage: RAI ML1101204182011-02-0707 February 2011 Summary of Telephone Conference Call Held with NRC and PG&E Concerning Requests for Additional Information Response Related to the Diablo Canyon Nuclear Power Plant, Units 1 and 2, LRA (TAC Nos. ME2896 & ME2897) Project stage: RAI ML1101400082011-02-0707 February 2011 01/04/11 Summary of Telephone Conference Call Held Between the NRC and PG&E Company Concerning Requests for Additional Information Related to the Diablo Canyon Nuclear Power Plant, Units 1 and 2, License Renewal Application (TAC Nos. ME2896 Project stage: RAI ML1104105282011-02-14014 February 2011 Summary of Telephone Conference Call Held on 1/19/11 Between the USNRC and PG&E Concerning Open Items Related to the Diablo Canyon Nuclear Power Plant, Units 1 and 2, Safety Evaluation Report Project stage: Approval ML1104607182011-02-18018 February 2011 January 25, 2011, Summary of Telephone Conference Call Held Between NRC and PG&E Concerning Open Items Related to the Diablo Canyon Nuclear Power Plant, Units 1 and 2, SER (TAC Nos. ME2896 & 2897) Project stage: Other ML1105907492011-03-17017 March 2011 Summary of Telephone Conference Calls Held on February 2 and 4, 2011, Btw the USNRC and Pacific Gas and Electric Company Concerning RAIs Related to the Diablo Canyon Nuclear Power Plant, Units 1 and 2, LRA Project stage: RAI ML1108404592011-04-11011 April 2011 Summary of Telephone Conference Calls Held on 2/28/11 and 3/17/11 Btw the USNRC and Pacific Gas and Electric Company Concerning RAIs Related to the Diablo Canyon Nuclear Power Plant, Units 1 and 2, LRA Project stage: RAI ML15217A4812015-09-24024 September 2015 Requests for Additional Information for the Review of the Diablo Canyon Power Plant, Units 1 and 2, License Renewal Application Set-38 TAC Nos. ME2896 and ME2897 Project stage: RAI 2010-08-26
[Table View] |
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Category:Memoranda
MONTHYEARML24157A0252024-07-0101 July 2024 Memo to Michelle Rome Summary of 4/4/2024 Meeting with CA SHPO ML24143A1202024-06-0303 June 2024 Memo to Michelle Rome Summary of 4/5/2024 Meeting with Ytt ML24108A1482024-05-0707 May 2024 February 2024 Environmental Scoping Meetings Related to the Diablo Canyon LRA - Memo ML24067A1572024-03-0707 March 2024 Memorandum from the Secretary Referring Hearing Request to the Atomic Safety and Licensing Board Panel 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 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 ML22109A1792022-05-0303 May 2022 Response OIG Special Inquiry Into Nrc'S Oversight AFW at Diablo Canyon (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) 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 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 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 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 2024-07-01
[Table view] Category:Meeting Summary
MONTHYEARML24157A0252024-07-0101 July 2024 Memo to Michelle Rome Summary of 4/4/2024 Meeting with CA SHPO ML24143A1202024-06-0303 June 2024 Memo to Michelle Rome Summary of 4/5/2024 Meeting with Ytt ML24108A1472024-05-0707 May 2024 February 2024 Diablo Canyon Public Scoping Meetings - Summary ML24108A1482024-05-0707 May 2024 February 2024 Environmental Scoping Meetings Related to the Diablo Canyon LRA - Memo ML24081A3362024-03-22022 March 2024 Summary of March 7, 2024, Closed Presubmittal Meeting with Pacific Gas and Electric Company Alternative Security Measures for Early Warning System License Amendment and Exemption Requests for Diablo Canyon Units 1 and 2 ML23268A4072023-09-27027 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 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 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 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. 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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 2024-07-01
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UNITED NUCLEAR REGULATORY WASHINGTON, D.C. 20555-0001 March 17, 2011 LICENSEE:
Pacific Gas and Electric Company FACILITY:
Diablo Canyon Nuclear Power Plant, Units 1 and 2
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALLS HELD ON FEBRUARY 2 AND 4, 2011, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING REQUESTS FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. ME2896 AND ME2897) The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Pacific Gas and Electric Company (PG&E or the applicant) held telephone conference calls on February 2 and 4, 2011, to obtain clarification on the applicant's response to requests for additional information (RAls) regarding the Diablo Canyon Nuclear Power Plant license renewal application.
By letter dated December 20, 2010, the staff issued follow up RAls regarding the Flux Thimble Tube Program. Due to the timing of the request and the issuance of the safety evaluation report with open items, the staff identified issues related to this aging management program as an open item. The staff requested a telephone conference call to express its concerns regarding the open item. The telephone conference call was useful in clarifying the staff's concerns.
Enclosure 1 provides a listing of the participants.
Enclosure 2 provides discussions on the RAI and related open item. The applicant had an opportunity to comment on this summary. Nathaniel B. Ferrer, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323
Enclosures:
As stated cc w/encls: Distribution via Listserv TELEPHONE CONFERENCE DIABLO CANYON NUCLEAR POWER PLANT. UNITS 1 AND LICENSE RENEWAL LIST OF FEBRUARY 2 AND 4, PARTICIPANTS:
Nate Ferrer Kim Green Allen Hiser Jim Medoff Yogen Garud Terry Grebel Mike Wright Kyle Duke Dan Hardesty Joon Kang U.S. Nuclear Regulatory Commission (NRC) NRC NRC NRC Argonne National Laboratory (contractor)
Pacific Gas and Electric Company (PG&E) PG&E PG&E PG&E PG&E ENCLOSURE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND LICENSE RENEWAL REQUEST FOR ADDITIONAL FLUX THIMBLE TUBE INSPECTION By letter dated December 20, 2010, the staff issued a request for additional information (RAI) regarding certain aspects of the Pacific Gas and Electric's (PG&E or the applicant)
Flux Thimble Tube Inspection Program. Because the applicant did not have time to respond to the RAI prior to issuance of the safety evaluation report (SER), the staff identified the issues as an open item in the SER. By letter dated January 12, 2011, the applicant responded to the staff's RAls. The RAls and response of interest are provided below along with a discussion of the issue. Response to RAI 82.1.21-1 (follow up) tn its response, the applicant stated that it performed eddy current tests on thimble tubes from the Unit 1, 3rd refueling outage (RO), and sent the results to Westinghouse as part of the WCAP-12866 program. PG&E stated that based on the WCAP, it is not necessary to add any uncertainty to the eddy current indications, and that "[t]or conservatism, a wall loss of 80% should now be used to determine when a thimble action is required (Le., repositioned, replaced, etc.}." PG&E considers that its acceptance criteria of 68 percent includes 17.5 percent margin compared to the 80 percent limit recommended in WCAP-12866.
Discussion:
During the calls, the staff explained that the applicant's current procedure for projecting wear rates does not currently reflect an uncertainty term for measurement uncertainty.
However, the Westinghouse calculation referenced in the procedure suggests that a factor be included for measurement uncertainty.
The staff asked that the applicant revise its procedure to clearly identify whether measurement uncertainty is included. The applicant stated that it will revise the procedure as requested.
Response to RAI 82.1.21-2 (follow up) Describe how the trending of thimble tube wear rates accounts for the possibility of a non-linear or accelerating wear rate. In its response, PG&E stated that the possibility of non-linear or accelerating wear rates was addressed by STP R-22 FTT enhanced acceptance criteria which it listed in the response.
PG&E previously committed to limiting repositioning of any tube to one time, and stated that there are currently no tubes in either unit that have been repositioned more than once. Identify all aging effects and mechanisms that contributed to the degradation in Unit 2 flux thimble tube L 13 over time (i.e., as detected during the Unit 2, 11th, 12th, and 13th ROs) and discuss the failure analysis activities that were performed at the site or were contracted out to confirm the apparent cause of the degradation that had occurred in the tube and the rapid progression of the degradation mechanism that lead to the relative rapid leak in 2006 (Le., the leak occurred within four months of returning to power). ENCLOSURE 2
-In its response, PG&E stated that it sent a portion of the Unit 2 L 13 tube to Westinghouse for destructive analysis.
It further stated that "[tJhe piece had several wear scars on it but none were through wall. The wear scars conformed to the scars Westinghouse had seen during development of the WCAP-12866.
Their determination was that the event was caused by flow induced vibration of the thimble tube against the lower internals, core plate, or bottom nozzle. This was similar to otherfailures they had previously analyzed." Discussion:
With regard to request 2, the staff's concern is that the applicant's current procedure may not be conservative in predicting accelerated wear rates that may occur non-linearly.
The staff asked the applicant to make wear rate data (predicted and actual) available for audit to confirm if the wear rates are occurring in a linear or non-linear fashion. The applicant agreed to make its wear rate data available to the staff for audit. With regard to request 3, the staff explained that it could not determine the root cause of the flux thimble tube failure based on the information presented in the January 12th response provided by the applicant.
During the call, PG&E explained that it sent a portion of the flux thimble tube to Westinghouse for analysis, and PG&E performed eddy current testing on the portion of the flux thimble tube that failed. Based on the information from Westinghouse and the results of the eddy current test, PG&E determined that the root cause of the failure of the tube was wear, and that no cracks were detected.
The staff asked the applicant to amend its previous response to explain this. The applicant agreed to amend its response and explain how it arrived at the conclusion that no cracks occurred.
March 17, 2011 LICENSEE:
Pacific Gas and Electric Company FACILITY:
Diablo Canyon Nuclear Power Plant, Units 1 and 2
SUBJECT:
SUMMARY
OF TELEPHONE CONFERENCE CALLS HELD ON FEBRUARY 2 AND 4,2011, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING REQUESTS FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. ME2896 AND ME2897) The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Pacific Gas and Electric Company (PG&E or the applicant) held telephone conference calls on February 2 and 4, 2011, to obtain clarification on the applicant's response to requests for additional information (RAls) regarding the Diablo Canyon Nuclear Power Plant license renewal application.
By letter dated December 20,2010, the staff issued follow up RAls regarding the Flux Thimble Tube Program. Due to the timing of the request and the issuance of the safety evaluation report with open items, the staff identified issues related to this aging management program as an open item. The staff requested a telephone conference call to express its concerns regarding the open item. The telephone conference call was useful in clarifying the staff's concerns.
Enclosure 1 provides a listing of the participants.
Enclosure 2 provides discussions on the RAI and related open item. The applicant had an opportunity to comment on this summary. IRA! Nathaniel B. Ferrer, Project Manager Projects Branch 2 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323
Enclosures:
As stated cc w/encls: Distribution via Listserv DISTRIBUTION:
See next page ADAMS Accession Number" . ML110590749 OFFICE LA:DLR PM:DLRRPB2 BC:DLRRPB2 PM:DLRRPB2 NAME IKing NFerrer DWrona NFerrer DATE 02/07/2011 02/08/2011 03/14/2011 03/17/2011 OFFICIAL RECORD Letter to Pacific Gas and Electric Company from Nathaniel B. Ferrer dated March 17, 2011
SUMMARY
OF TELEPHONE CONFERENCE CALLS HELD ON FEBRUARY 2 AND 4, 2011, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND PACIFIC GAS AND ELECTRIC COMPANY CONCERNING REQUESTS FOR ADDITIONAL INFORMATION RELATED TO THE DIABLO CANYON NUCLEAR POWER PLANT, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (TAC NOS. ME2896 AND ME2897) DISTRIBUTION:
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