Letter Sequence Other |
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MONTHYEARML0305507202003-04-0101 April 2003
Attachment - 05/20/2002 Summary of Conference Call with Pacific Gas & Electric Co. 2002 Steam Generator Inspection Results at Diablo Canyon Unit 1
Project stage: Request
ML0309105422003-04-0101 April 2003
Summary of Conference Call with Pacific Gas & Electric Co. 2002 Steam Generator Inspection Results at Diablo Canyon Unit 1
Project stage: Other
ML0313303572003-05-13013 May 2003
Letter, Steam Generator Tube Inservice Inspection Telephone Conference
Project stage: Other
2003-04-01
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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] |
Text
April 1, 2003 MEMORANDUM TO: File FROM: Girija S. Shukla, Project Manager, Section 2 /RA/
Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF CONFERENCE CALL WITH PACIFIC GAS AND ELECTRIC COMPANY REGARDING THE 2002 STEAM GENERATOR INSPECTION RESULTS AT DIABLO CANYON UNIT 1 (TAC NO. MB5152)
On May 20, 2002, the NRC staff participated in a conference call with Pacific Gas and Electric Company regarding the ongoing steam generator tube inspection activities at Diablo Canyon Unit 1. Attached is a summary of the conference call.
Docket No. 50-275
Attachment:
Summary of Conference Call
April 1, 2003 MEMORANDUM TO: File FROM: Girija S. Shukla, Project Manager, Section 2 /RA/
Project Directorate IV Division of Licensing Project Management Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF CONFERENCE CALL WITH PACIFIC GAS AND ELECTRIC COMPANY REGARDING THE 2002 STEAM GENERATOR INSPECTION RESULTS AT DIABLO CANYON UNIT 1 (TAC NO. MB5152)
On May 20, 2002, the NRC staff participated in a conference call with Pacific Gas and Electric Company regarding the ongoing steam generator tube inspection activities at Diablo Canyon Unit 1. Attached is a summary of the conference call.
Docket No. 50-275
Attachment:
Summary of Conference Call DISTRIBUTION:
PUBLIC PDIV-2 Reading RidsDlpmPdiv (WRuland)
RidsNrrPMGShukla RidsNrrLAEPeyton BFu KKarwoski CMarschall, Region IV LLund CKhan
Attachment:
Accession No. ML030550720 Package: Accession No. ML030910575 Memo: Accession No. ML030910542 NRR-106 OFFICE PDIV-2/PM PDIV-2/LA PDIV-2/SC NAME GShukla EPeyton SDembek DATE 2/26/03 2/26/03 4/01/03 DOCUMENT NAME: C:\ORPCheckout\FileNET\ML030910542.wpd OFFICIAL RECORD COPY
SUMMARY
OF CONFERENCE CALL BETWEEN THE NRC STAFF AND PACIFIC GAS AND ELECTRIC COMPANY REGARDING THE 2002 STEAM GENERATOR INSPECTION RESULTS DIABLO CANYON UNIT 1 DOCKET NO. 50-275 The NRC staff participated in a conference call with Pacific Gas and Electric Company (PG&E/
the licensee) representatives on May 20, 2002, to discuss the ongoing steam generator (SG) inspection activities at Diablo Canyon Unit 1. The issues discussed included those listed in the enclosure to the letter documenting the arrangement of this conference call, which was sent to PG&E on May 17, 2002 (Accession #ML021750581). The licensee provided supporting information which is attached.
At the time of the call, data acquisition and analyses were complete. Details of the licensees initial inspection scope and expansion criteria are described in the licensees written materials.
Several of these topics were discussed during the conference call.
6 In the U-bend region, 100% of the tubes in Rows 1 and 2, plus 20% of the tubes in Row 3, were inspected with a rotating probe coil (RPC) equipped with a Plus point (+Pt) coil.
The expansion of the inspection to Row 3 of the U-bends is due to a recent report of low-row U-bend indications found in other plants.
6 Of the approximately 150 tubes deplugged during the outage, no tubes exhibited any swelling.
6 Although minor primary-to-secondary leakage was observed during the cycle, no through-wall flaws were detected nor were any leaking plugs identified during the visual inspection.
6 The scope of the plus-point coil inspections of dents at the tube support plate differ from steam generator to steam generator since the extent of denting and the cracking observed varies from steam generator to steam generator.
6 The licensee indicated that all tubes which were not expanded in the tubesheet (i.e., NTEs) were plugged.
6 The selection of which dings to inspect was random (i.e., the size of the ding was not used in the selection criteria).
The licensee provided a table in the attached material summarizing the inspection findings.
The table is attached. Several of the items in the table were clarified during the conference call, as discussed below.
W* ARC (Axial indications in the WEXTEX region inside tubesheet):
There was one axial primary water stress corrosion cracking (PWSCC) indication which failed to meet the W* criteria. This was a new indication (i.e., was not detected or present in the previous inspections).
During this outage, no in-situ testing was performed to support the W* leakage model. This is due to the fact that none of the flaws met the W* in-situ testing selection criteria.
GL 95-05, "Voltage-Based Repair Criteria for Westinghouse Steam Generator Tubes Affected by Outside Diameter Stress Corrosion Cracking" One indication was detected in a tube at a tube support plate location with a tube support plate ligament indication. This indication will be addressed in the licensees response to GL 95-05.
U-Bend Noise The licensee inspected the U-bend region of the tubes from Row 1 to Row 3 with a mid-range plus point coil. U-bends with high noise levels were also inspected with high frequency plus point coils.
Axial PWSCC ARC Mixed-mode indications were detected at two dented support plate intersections. One indication consisted of an inside-diameter axial flaw and an outside-diameter (OD) circumferential flaw separated by 0.65 inches. The other mixed-mode indication consisted of an OD axial flaw and an OD circumferential flaw. Both of the tubes were plugged. The indications were small. They will be further evaluated and will be discussed in the licensees 90-day report.
In-Situ Testing There was no in-situ testing performed during this outage. The licensee stated that none of the flaws detected during the outage met the in-situ testing criteria. The licensee further stated that, based on the evaluation, the flaws were not even close to meeting the in-situ testing criteria.
The NRC staff did not have any further questions and determined a followup call was not required.
Attachments: Material Provided by Licensee (ADAMS Accession No. ML030550720)
