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MONTHYEARML0924405082009-08-27027 August 2009 Slides from August 27, 2009, Meeting with Pacific Gas and Electric Process Protection System Replacement Project stage: Request ML0924504762009-09-25025 September 2009 Summary of Meeting with Pacific Gas & Electric Company to Discuss Pre-Application of Digital Upgrade and Eagle-21 Portion of Reactor Trip System at Diablo Canyon Power Plant, Units 1 and 2 Project stage: Meeting ML1001105262010-01-14014 January 2010 Notice of Forthcoming Meeting with Pacific Gas and Electric Company to Discuss Digital Upgrade and Eagle-21 Portion of Reactor Trip System at Diablo Canyon Power Plant, Units 1 and 2 Project stage: Meeting ML1006903922010-03-0303 March 2010 Licensee Slides from 3/3/2010 Meeting with Pacific Gas and Electric Company to Discuss Digital Upgrade and Eagle-21 Portion of Reator Trip System at Diablo Canyon Power Plant, Units 1 and 2 Project stage: Meeting ML1007403882010-03-18018 March 2010 Summary of Meeting with Pacific Gas and Electric Company to Discuss Digital Upgrade and Eagle-21 Portion of Reactor Trip System at Diablo Canyon Power Plant, Units 1 and 2 Project stage: Meeting ML1012602062010-05-14014 May 2010 3/3/2010 Revised Summary of Meeting with Pacific Gas and Electric Company to Discuss Digital Upgrade and Eagle-21 Portion of Reactor Trip System at Diablo Canyon Power Plant, Units 1 and 2 Project stage: Meeting 2010-01-14
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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 NUCLEAR REGULATORY WASHINGTON, D.C. 20555-0001 March 18, 2010 LICENSEE:
Pacific Gas and Electric Company FACILITY:
Diablo Canyon Power Plant, Units 1 and 2
SUMMARY
OF MARCH 3, 2010, MEETING WITH PACIFIC GAS AND ELECTRIC COMPANY TO DISCUSS DIGITAL UPGRADE AT DIABLO CANYON POWER PLANT, UNITS 1 AND 2 (TAC NOS. ME1778 AND ME1779) On March 3, 2010, a Category 1 public meeting was held between the U.S. Nuclear Commission (NRC) and representatives of the Pacific Gas and Electric Company (PG&E, licensee) at NRC Headquarters, One White Flint l\Iorth, 11555 Rockville
- Pike, Maryland.
This was the second meeting held to discuss the digital upgrade of the reactor system and the engineered safety features actuation system at the Diablo Canyon Power (DCPP). PG&E discussed the architecture that PG&E will propose to the NRC for replacement of the Eagle 21 portion of the DCPP process protection system. A list of is At the meeting, the licensee presented meeting slides entitled, "Diablo Canyon Power Process Protection System Replacement," dated March 3, 2010, which are available in Agencywide Documents Access and Management System (ADAMS) Accession ML 100690392.
A summary of the items discussed at the meeting is provided Scope PG&E provided clarification of the scope of the proposed upgrade. The existing Eagle 21 system which provides trip status and parameter input signals to the Solid State Protection System (SSPS), which in turn performs the reactor trip and engineered safety feature actuation functions is to be replaced with a combination Tricon Triconex (software-based computer system) and CS Innovations Advanced Logic Systems (ALS) (field programmable gate array or FPGA-based) system. The licensee plans to retain the analog SSPS protection system for now. Therefore, the proposed modification is a partial reactor protection system upgrade that does not include the voter functionality which will continue to be performed by the SSPS system. Diversity The proposed design includes the use of the ALS FPGA technology for those safety functions that currently require manual operator actions (MOAs) in the event of a software common-cause failure. DCPP stated that the new system will rely on the built-in diversity capability of the ALS in order to eliminate the need for MOAs. As such, it will be necessary for the license amendment request (LAR) to reference the ALS topical report (TR) in order to credit its built-in diversity features.
This TR is scheduled to be submitted to the NRC for a safety evaluation later this year. The signals requiring diversity include containment pressure, reactor coolant system
-2 flow, and pressurizer pressure.
The safety actuations requiring this diversity are containment spray, safety injection, and reactor trip. Cross-Divisional Communications The licensee stated that the proposed design will not include cross-divisional communication links. The DCPP design is maintaining communication independence between safety divisions.
Also, because there is no voter function in the proposed design, there will be no requirement for interdivisional communications.
This is expected to simplify the review process. Non-Safety Related Maintenance Terminal The DCPP design will have non-safety-related (NSR) maintenance terminals connected to the safety system at all times. There will be a separate maintenance terminal for each of the four divisions.
Each of the proposed maintenance terminals will serve as the interface for both the Tricon system and the ALS system for the associated division.
Safety-related to NSR One-Way Communications The proposed design includes a communications link to the existing Process Plant Computer (PPC) system. The licensee stated that this was to be a one-way communications pathway from the safety-related system to the PPC. The licensee also stated that to enforce this, one or more port aggregator devices, similar to devices previously approved for communication isolation, will be included in this design. Class I to Class II Boundary The proposed design also includes a fiber optic communication link from the Class I Tricon to a Class II Tricon Remote Chassis. This remote chassis will be classified as NSR and the communications link would be reviewed in a manner similar to the safety-related to NSR PPC links described above. This is a two-way communications link and the design details of this link including protocols, communication architecture, and communication software controls would be subject to a detailed evaluation by the NRC staff. Software Development PG&E stated the initial software development will be performed by the vendor Invensys.
Upon turnover of the system to the licensee for operation, either PG&E or Invensys will perform the activities associated with software maintenance and operation.
The NRC staff informed the licensee that because of this approach, the review would include an assessment of the licensee's software control programs, as well as coordination activities that would be necessary for both parties to maintain consistent configuration control over the systems software components.
-3 Security PG&E presented slides containing material covering both the security guidance addressed in Regulatory Guide (RG) 1.152, Revision 2, "Criteria for Digital Computers in Safety Systems of Nuclear Power Plants," and the cyber security regulation of Title 10 of the Code of Federal Regulations (10 CFR), Section 73.54, "Protection of digital computer and communication systems and networks." While the 10 CFR 73.54 regulation will ultimately be important for the utility to address, compliance to the regulation will not be included under the 10 CFR Part 50 licensing review. In addition, the NRC staff stated that the security provisions of RG 1.152 that cover the operational phases (i.e., Regulatory Positions 2.6 -2.9) were expected to be removed in the next revision to the RG. The NRC staff noted that a focus of the Part 50 review would be on protection of the development environment (for both operating system and application software) from introduction of undocumented code, protection of the system's reliable operation from the effects of undesirable behavior of connected systems and protection of the system from unintended access. With regard to TRs that vendors may submit, the NRC staff noted that an essential item for the vendor was demonstration that the development environment was protected.
PG&E stated that it is approximately 20 months behind schedule and that the LAR supporting this change is now scheduled to be submitted in May 2011. The NRC staff noted that the priority for reviews is based on a first-in basis and that other licensees have indicated plans to submit licensing actions for digital upgrades.
PG&E stated it plans to submit its depth analyses shortly. The NRC staff reminded PG&E that the NRC will not accept for review any amendment that references an unapproved topical. Members of the public were in attendance, however, no public Meeting Feedback forms were received.
Please direct any inquiries to me at 301-415-1445, or Alan.Wang@nrc.gov.
Alan Wang, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-275 and List of cc w/encl: Distribution via LIST OF MARCH 3, 2010, MEETING WITH PACIFIC GAS AND ELECTRIC COMPANY NAME J. Hefler B. Haynes S. Zimmerman S. Sykes E. Quinn S. Sorensen C. Vitalbo G. Clefton D. Raleigh K. Schrader S. Patterson R. Stattel W. Kemper A. Wang N.Carte G. Singh T. Mossman S. Wyman DIGITAL UPGRADE OF EAGLE 21 SYSTEM DIABLO CANYON POWER PLANT, UNITS 1 AND 2 DOCKET NOS. 50-275 AND 50-323 AFFILIATION ALTRAN INVENSYS INVENSYS INVENSYS ALTRAN CS Innovations Westinghouse Nuclear Energy Institute Scientech PG&E PG&E NRC NRC NRC NRC NRC NRC NRC Enclosure
-3 Security PG&E presented slides containing material covering both the security guidance addressed in Regulatory Guide (RG) 1.152, Revision 2, "Criteria for Digital Computers in Safety Systems of Nuclear Power Plants," and the cyber security regulation of Title 10 of the Code of Federal Regulations (10 CFR), Section 73.54, "Protection of digital computer and communication systems and networks." While the 10 CFR 73.54 regulation will ultimately be important for the utility to address, compliance to the regulation will not be included under the 10 CFR Part 50 licensing review. In addition, the NRC staff stated that the security provisions of RG 1.152 that cover the operational phases (i.e., Regulatory Positions 2.6 -2.9) were expected to be removed in the next revision to the RG. The NRC staff noted that a focus of the Part 50 review would be on protection of the development environment (for both operating system and application software) from introduction of undocumented code, protection of the system's reliable operation from the effects of undesirable behavior of connected systems and protection of the system from unintended access. With regard to TRs that vendors may submit, the NRC staff noted that an essential item for the vendor was demonstration that the development environment was protected.
PG&E stated that it is approximately 20 months behind schedule and that the LAR supporting this change is now scheduled to be submitted in May 2011. The NRC staff noted that the priority for reviews is based on a first-in basis and that other licensees have indicated plans to submit licensing actions for digital upgrades.
PG&E stated it plans to submit its depth analyses shortly. The NRC staff reminded PG&E that the NRC will not accept for review any amendment that references an unapproved topical. Members of the public were in attendance, however, no public Meeting Feedback forms were received.
Please direct any inquiries to me at 301-415-1445, or Alan.Wang@nrc.gov.
IRA! Alan Wang, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-275 and List of cc w/encl: Distribution via Listserv DISTRIBUTION:
PUBLIC RidsNrrLAJBurkhardt Resource GSingh, NRRlDE/EICB RidsAcrsAcnw_MailCTR Resource RidsOgcRp Resource TMossman, NRRlDE/EICB RidsNrrDeEicb Resource RidsRgn4MailCenter Resource SWyman, NRRlDE/EICB RidsNrrDorlLpl4 Resource NCarte, NRRIDE/EICB CSteger, NRR RidsNrrPMDiabloCanyon Resource RStattel, NRRIDE/EICB L Trocine, EDO RIV ADAMS Accession Nos. Meetino Notice ML09209415, Meeting Summary ML 100740388, Handouts ML092440508 OFFICE NRRlLPL4/PM NRRlLPL4/LA NRRlLPL4/BC NRRlLPL4/PM NAME AWang JBurkhardt MMarkley AWang DATE 3/17/10 3/16/10 3/17/10 3/18/10 OFFICIAL RECORD COpy