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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
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 August 18, 2009 LICENSEE: PACIFIC GAS AND ELECTRIC COMPANY FACILITY: DIABLO CANYON POWER PLANT, UNITS 1 AND 2 SUB..IECT:
SUMMARY
OF JULY 22,2009, MEETING WITH PACIFIC GAS AND ELECTRIC COMPANY, ON TECHNICAL SPECIFICATION INTERPRETATION OF 230 KV OFFSITE POWER SYSTEM (TAC NOS. ME0711 AND ME0712)
On July 22, 2009, a Category 1 public meeting was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of Pacific Gas and Electric Company (PG&E, the licensee) at NRC Headquarters, Two White Flint North, 11545 Rockville Pike, Rockville, Maryland. By letter dated February 23,2009 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML090650592), PG&E requested an NRC interpretation of Technical Specification (TS) 3.8.1, "AC Sources - Operating," and TS 3.8.2, "AC Sources - Shutdown." PG&E had requested this meeting to provide additional background and clarification in support of its request. A list of attendees is enclosed.
In the February 23, 2009, letter, the licensee stated that its licensing position regarding the operability of the 230 kilovolt (kV) offsite power system at Diablo Canyon Power Plant (DCPP) to meet TS 3.8.1 and TS 3.8.2 as follows:
The 230 kV offsite power system is considered operable for normal and off normal configurations when load flow and dynamic loading analyses demonstrate that the 230 kV system has sufficient capacity and capability to operate the engineered safety features for a design basis accident (or unit trip) on one unit, and those systems required for an orderly shutdown of the second unit. A concurrent trip of the second unit need not be assumed. Operability is based on the ability to transfer to the 230 kV offsite power system without loading the emergency diesel generators, and provide adequate voltage to safety-related loads.
The NRC staff's review divided the request into two parts: (1) the TS interpretation of TS 3.8.1 and 3.8.2, and (2) the licensing basis interpretation supporting the licensee's definition of operability of the 230 kV system. The NRC staff stated its preliminary conclusions are that the NRC disagrees with licensee's position regarding TS 3.8.1 and TS 3.8.2 operability and its licensing basis position that the 230 kV system has sufficient capacity and capability to operate the engineered safety features (ESF) for a design-basis accident (or unit trip) on one unit, and those systems required for an orderly shutdown of the second unit and that a concurrent trip of the second unit need not be assumed. In addition, the NRC staff noted that in the PG&E license amendment request (LAR 98-01) dated January 14,1998, as supplemented on February 5, 1999, the licensee did not request a change to the licensing basis regarding the above position nor did the NRC staff in its approval of Amendment Nos. 132 and 130 for DCPP, Units 1 and 2, respectively, dated April 29, 1999, approve the above licensing basis position.
-2 The licensee provided the NRC staff presentation slides in support of this meeting (ADAMS Accession No. ML092040370). PG&E discussed the 230 kV system, including a discussion of the design and the load flow analyses supporting the design, a history of the design and licensing basis, system upgrades related to license amendment request 98-01, and DCPP's operating history. PG&E stated it agreed that: (1) the current TS would not support its interpretation of operability for TS 3.8.1 and TS 3.8.2; (2) the design basis for the DCPP is Institute of Electrical and Electronics Engineers (IEEE) 308-1971; and (3) PG&E did not request a change to the licensing basis regarding the 230 kV system in LAR 98-01. However, PG&E stated the design/licensing basis for the 230 kV system is to provide sufficient capacity and capability to operate the ESF loads design-basis accident (or unit trip) on one unit, and those systems required for an orderly shutdown of the second unit and was clarified by LAR 98-01 and validated by the NRC in its approval of the amendment request. PG&E also stated that the load flow analyses of record, performed to demonstrate the adequacy of the 230 kV system, reflect both the loads associated with an accident in one unit and the shutdown loads of the other unit in meeting the total preferred capacity requirement of the 230 kV system as required by IEEE 308-1971.
The NRC had the following questions as result of the meeting:
- 1. What sequences the ESF loads on?
- 2. Do the second level undervoltage relays (SLURS) meet the branch technical position?
- 3. Is a dual unit trip an anticipated operational occurrence?
- 4. Verify that Procedure 023 does not assume any operation from two units.
- 5. What is the operational impact of a "concurrent" versus "orderly" shutdown of the second unit?
Members of the public were not in attendance. Public Meeting Feedback forms were not received.
The NRC staff thanked PG&E for the presentation and noted that a decision on its February 23, 2009, request will be made after review of the requested information. Please direct any inquiries to me at 301-415-1445, or Alan.Wang@nrc.gov.
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B. Wang, Projeot Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323
Enclosure:
List of Attendees cc w/encl: Distribution via Listserv
LIST OF ATrENDEES JULY 22,2009, MEETING WITH PACIFIC GAS AND ELECTRIC (PG&E)
TECHNICAL SPECIFICATION INTERPRETATION OF DIABLO CANYON POWER PLANT 230 KV SYSTEM NAME AFFLIATION Stan Ketelsen PG&E Ryan West PG&E Loren Sharp PG&E Susan Wescott PG&E Larry Parker PG&E David Repke Winston & Strawn Carl Schulten NRC Mauri Lemoncelli NRC Michael Markley NRC Vincent Gaddy NRC Sheila Ray NRC G. Singh Matharu NRC Gerald Waig NRC Tony Brown NRC Roy Mathew NRC Kenn Miller NRC Michael Peck NRC Alan Wang NRC Enclosure
-2 The licensee provided the NRC staff presentation slides in support of this meeting (ADAMS Accession No. ML092040370). PG&E discussed the 230 kV system, including a discussion of the design and the load flow analyses supporting the design, a history of the design and licensing basis, system upgrades related to license amendment request 98-01, and DCPP's operating history. PG&E stated it agreed that: (1) the current TS would not support its interpretation of operability for TS 3.8.1 and TS 3.8.2; (2) the design basis for the DCPP is Institute of Electrical and Electronics Engineers (IEEE) 308-1971; and (3) PG&E did not request a change to the licensing basis regarding the 230 kV system in LAR 98-01. However, PG&E stated the design/licensing basis for the 230 kV system is to provide sufficient capacity and capability to operate the ESF loads design-basis accident (or unit trip) on one unit, and those systems required for an orderly shutdown of the second unit and was clarified by LAR 98-01 and validated by the NRC in its approval of the amendment request. PG&E also stated that the load flow analyses of record, performed to demonstrate the adequacy of the 230 kV system, reflect both the loads associated with an accident in one unit and the shutdown loads of the other unit in meeting the total preferred capacity requirement of the 230 kV system as required by IEEE 308-1971.
The NRC had the following questions as result of the meeting:
- 1. What sequences the ESF loads on?
- 2. Do the second level undervoltage relays (SLURS) meet the branch technical position?
- 3. Is a dual unit trip an anticipated operational occurrence?
- 4. Verify that Procedure 023 does not assume any operation from two units.
- 5. What is the operational impact of a "concurrent" versus "orderly" shutdown of the second unit?
Members of the public were not in attendance. Public Meeting Feedback forms were not received.
The NRC staff thanked PG&E for the presentation and noted that a decision on its February 23, 2009, request will be made after review of the requested information. Please direct any inquiries to me at 301-415-1445, or Alan.Wang@nrc.gov.
Iral Alan B. Wang, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-275 and 50-323
Enclosure:
List of Attendees cc w/encl: Distribution via Listserv DISTRIBUTION:
PUBLIC RidsNrrLAJBurkhardt Resource SRay, NRRJDE/EEEB Branch Reading RidsOgcRp Resource GMatharu, NRRJDE/EEEB RidsAcrsAcnw_MailCTR Resource RidsRgn4MailCenter Resource VGaddy, RIV RidsNrrDeEeeb Resource CSchulten, NRRJDIRS/ITSB MPeck, RIV RidsNrrDirsltsb Resource GWaig, NRRJDIRS/ITSB TBrown, RIV RidsNrrDorlLpl4 Resource RMathew, NRRJDE/EEEB LTrocine, EDO RIV RidsNrrPMDiabloCanyon Resource KMiller, NRRJDE/EEEB MLemoncelli, OGC ADAMS Accession No. PKG ML092090388, Meeting Notice: ML091890794, Meeting Summary: ML092090387, Handouts ML092040370 OFFICE DORULPL4/PM DORL/LPL4/LA DIRSIITSB/BC DE/EEEB/BC DORULPL4/BC DORLlLPL4/PM MMarkley MThadani NAME AWang JBurkhardt RElliott GWilson for AWang JRHall for DATE 8/6/09 8/5/09 8/14/09 8/17/09 8/18/09 8/18/09
