ML15295A260
| ML15295A260 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 11/04/2015 |
| From: | DiFrancesco N J Japan Lessons-Learned Division |
| To: | |
| Wyman S, 415-3041, O-13C05M | |
| References | |
| TAC MF3764, TAC MF3765, TAC MF3766 | |
| Download: ML15295A260 (5) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555-0001 November 4, 2015 LICENSEE: Tennessee Valley Authority FACILITY: Browns Ferry Nuclear Plant, Units 1, 2, and 3 SUBJECT: SUMMARY OF JULY 14, 2015, PUBLIC MEETING WITH TENNESSEE VALLEY AUTHORITY TO DISCUSS SEISMIC PROBABLISTIC RISK ASSESSMENT PLANNED FOR BROWNS FERRY NUCLEAR PLANT UNITS 1, 2 AND 3 (TAC NOS. MF3764, MF3765 AND MF3766) On July 14, 20151, the U.S. Nuclear Regulatory Commission (NRC) staff held a Category 1 public meeting with Tennessee Valley Authority (TVA, the licensee) at NRC Headquarters, One White Flint North, 11555 Rockville Pike, Rockville, Maryland. The purpose of the meeting was to discuss ongoing licensee and staff reviews regarding seismic probabilistic risk assessment (SPRA) associated with the implementation of Recommendation 2.1: Seismic of the March 12, 20122, NRC request for information issued pursuant to Title 10 to the Code of Federal Regulations Part 50, Section 50.54(f) (hereafter called the 50.54(f) letter) for Browns Ferry Nuclear Plant, Units 1, 2, and 3 (Browns Ferry). The NRC staff as part of a public meeting on May 21, 20153, informed licensees of efforts to reassess the need for completing seismic risk evaluation for Group 2 and Group 3 plants. In support of the reassessment effort, licensees were encourage to provide supplemental information to inform the staff deliberation process. During the meeting, NRC staff and TVA representatives discussed the specific criteria NRC reviewed in finding that the Browns Ferry IPEEE did not meet SPID4 screening criteria5. TVA representatives discussed Brown's Ferry6 seismic capacity and Generic Issue 199 risk insights. The NRC staff and TVA representatives' discussions the SPRA reassessment process to determine if a SPRA is warranted included the following meeting highlights:
- The NRC staff communicated to TVA representatives that seismic reassessment of the seismic probabilistic risk assessment (SPRA) is in the process of being finalized, but the NRC remains open to considering updated information for work that TVA has already 1 The meeting notice is available via the Agencywide Documents Access and Management System (ADAMS) under Accession No. ML 15180A291. 2 The 50.54(f) letter and Enclosure 1 are available under ADAMS Accession Nos. ML 12053A340 and ML 12056A047, respectively. 3 The May 21, 2015, seismic meeting summary is available under ADAMS Accession No. ML 15147A677. 4 The EPRI, "Seismic Evaluation Guidance: Screening, Prioritization and Implementation Details (SPID) for the Resolution of Fukushima Near-Term Task Force Recommendation 2.1: Seismic," guidance document is found in ADAMS under Accession No. ML 12333A170. 5 The staff review of the Browns Ferry IPEEE for seismic screening purposes is documented in letters dated May 9, 2014, and April 21, 2015, and are available under ADAMS Accession Nos. ML 14111A 147 and ML 15090A745, respectively. 6 TVA's slide presentation is available under ADAMS Accession No. ML 15293A458.
-2 -completed. The NRC staff emphasized that resource limitations would not allow for extensive review efforts.
- The NRC staff communicated to TVA an overview of the reassessment process and discussed specific criteria used to make the determination that a SPRA is warranted.
- The licensee presented "Brown's Ferry Seismic Risk Insights," which highlighted improvements to Brown's Ferry seismic capacity, improvements resulting from Individual Plant Examination of External Events plant capacity and resulting reduction of the seismic core damage frequency.
- The NRC agreed to provide an email7 to TVA detailing specific information needed to demonstrate the seismic capacity improvements to Brown's Ferry.
- The NRC staff requested a supplement be docketed should TVA seek consideration of these additional insights. By letter dated October 27, 2015 (ADAMS Accession No. ML 15194A015), the staff found that a SPRA is expected for Browns Ferry. No regulatory decisions or commitments were made during the meeting. The public was invited to observe the meeting and was given an opportunity to communicate with the NRC during the public meeting before adjourning. The NRC staff received no public comments and no meeting feedback forms were received. Please direct any inquiries to me at 301) 415-1115 or by e-mail at Nicholas.Difrancesco@nrc.gov. Docket Nos. 50-259, 50-260 and 50-296 Enclosure: List of Attendees cc w/encl : Distribution via Listserv Nicholas J. DiFra esco, Senior Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation 7 The July 16, 2015 NRG staff email to TVA is available under ADAMS Accession No. ML 15293A607.
Name Jack Davis Mohamed Shams Andrea Kock Diane Jackson Donnie Harrison Nilesh Chokshi Farideh Saba List of Attendees U.S. Nuclear Regulatory Commission Public Meeting with the Tennessee Valley Authority Concerning Seismic Hazard Reevaluation Submittals for Browns Ferry Nuclear Plant, Units 1, 2, and 3 July 14, 2015 Attendees Organization Name NRC/NRR/JLD Joe Shea NRC/NRR/JLD Steve Douglas NRC/NRO/DSEA Russell Thompson NRC/NRO/DSEA Penny Selman NRC/NRO/DSRA Dan Kearnaghen NRC/NRO/DSEA Justin Huber NRC/NRR/DORL Ram Srinivasan Nicholas DiFrancesco NRC/NRR/JLD Brenda Simril Steve Wyman NRC/NRR/JLD Kamal Manely NRC/NRR/DE Yong Li NRC/NRR/DE Frankie Vega NRC/NRR/JLD Michael Marshall NRC/NRR/JLD Attendees Via Telephone Name Organization Name Steve Laur NRC Gary Moore Steve Lock TVA Rick Cutsinger Jason Jackson TVA Jeff Clark Jamie Paul TVA Rick Hartoonian Organization TVA TVA TVA TVA TVA TVA TVA TVA 0 rga n ization Public Public Exelon Public Abbreviations: DE -Division of Engineering DSEA -Division of Site Safety and Environmental Analysis JLD -Japan Lesson-Learned Division NEI -Nuclear Energy Institute EPRI -Electric Power Research Institute DSRA -Division of Safety Systems & Risk NRO -Office of New Reactors NRR -Office of Nuclear Reactor Regulation RES -Office of Nuclear Regulatory Research TVA-Tennessee Valley Authority Enclosure
-2 -completed. The NRC staff emphasized that resource limitations would not allow for extensive review efforts.
- The NRC staff communicated to TVA an overview of the reassessment process and discussed specific criteria used to make the determination that a SPRA is warranted.
- The licensee presented "Brown's Ferry Seismic Risk Insights," which highlighted improvements to Brown's Ferry seismic capacity, improvements resulting from Individual Plant Examination of External Events plant capacity and resulting reduction of the seismic core damage frequency.
- The NRC agreed to provide an email8 to TVA detailing specific information needed to demonstrate the seismic capacity improvements to Brown's Ferry.
- The NRC staff requested a supplement be docketed should TVA seek consideration of these additional insights. By letter dated October 27, 2015 (ADAMS Accession No. ML 15194A015), the staff found that a SPRA is expected for Browns Ferry. No regulatory decisions or commitments were made during the meeting. The public was invited to observe the meeting and was given an opportunity to communicate with the NRC during the public meeting before adjourning. The NRC staff received no public comments and no meeting feedback forms were received. Please direct any inquiries to me at (301) 415-1115 or by e-mail at Nicholas.Difrancesco@nrc.gov. IRA/ Nicholas J. DiFrancesco, Senior Project Manager Hazards Management Branch Japan Lessons-Learned Division Office of Nuclear Reactor Regulation Docket Nos. 50-259, 50-260 and 50-296 Enclosure: List of Attendees cc w/encl : Distribution via Listserv DISTRIBUTION: PUBLIC JLD R/F AKock,NRO DJackson, NRO CMunson, NRO JAke, RES RidsNroOd RidsOgcMailCenter RidsAcrsAcnw_MailCTR DiFrancesco, NRR KManoly, NRR LYong, NRR RidsNrrLASLent RidsRgn1 MailCenter ADAMS Accession No.: ML15895A260 OFFICE NRR/JLD/JHMB/PM NRR/JLD/LA NRR/JLD/JHMB/BC NAME SWyman Slent MShams DATE 10/27/2015 10/30/2015 11/3/2015 OFFICIAL RECORD COPY RidsRgn2MailCenter RidsRgn3MailCenter RidsRgn4MailCenter RidsNrrDorl RidsOpaMail RidsNroDsea RidsNrrDe *Concurrence via e-mail NRR/JLD/PMB/PM NDiFrancesco 11/4/2015 8 The July 16, 2015 NRC staff email to TVA is available under ADAMS Accession No. ML 15293A607.