ML15295A260

July 14, 2015, Summary of Public Meeting with Tennessee Valley Authority to Discuss Topics Regarding Seismic Risk Evaluations Related to the Seismic Hazard Reevaluation for Browns Ferry Nuclear Plant (TACs MF3764, MF3765 and MF3766)

ML15295A260
Person / Time
Site:	Browns Ferry
Issue date:	11/04/2015
From:	Nicholas Difrancesco 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

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, 2015 1 , 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, 2012 2 , 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, 2015 3 , 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 criteria 5 .

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. ML15180A291.

2 The 50.54(f) letter and Enclosure 1 are available under ADAMS Accession Nos. ML12053A340 and ML12056A047, respectively.

3 The May 21, 2015, seismic meeting summary is available under ADAMS Accession No. ML15147A677.

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. ML12333A170.

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. ML14111A147 and ML15090A745, respectively.

6 TVA's slide presentation is available under ADAMS Accession No. ML15293A458.

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. ML15194A015), 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.

Nicholas J. DiFra esco, 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 7

The July 16, 2015 NRG staff email to TVA is available under ADAMS Accession No. ML15293A607.

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 Name Organization Name Organization Jack Davis NRC/NRR/JLD Joe Shea TVA Mohamed Shams NRC/NRR/JLD Steve Douglas TVA Andrea Kock NRC/NRO/DSEA Russell Thompson TVA Diane Jackson NRC/NRO/DSEA Penny Selman TVA Donnie Harrison NRC/NRO/DSRA Dan Kearnaghen TVA Nilesh Chokshi NRC/NRO/DSEA Justin Huber TVA Farideh Saba NRC/NRR/DORL Ram Srinivasan TVA Nicholas DiFrancesco NRC/NRR/JLD Brenda Simril TVA 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 0 rga n ization Steve Laur NRC Gary Moore Public Steve Lock TVA Rick Cutsinger Public Jason Jackson TVA Jeff Clark Exelon Jamie Paul TVA Rick Hartoonian Public Abbreviations: JLD - Japan Lesson-Learned Division DE - Division of Engineering NEI - Nuclear Energy Institute DSEA - Division of Site Safety and NRO - Office of New Reactors Environmental Analysis NRR - Office of Nuclear Reactor Regulation EPRI - Electric Power Research Institute RES - Office of Nuclear Regulatory Research DSRA - Division of Safety Systems & Risk TVA-Tennessee Valley Authority Enclosure

ML15194A015), 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 RidsOgcMailCenter RidsRgn2MailCenter JLD R/F RidsAcrsAcnw_MailCTR RidsRgn3MailCenter AKock,NRO DiFrancesco, NRR RidsRgn4MailCenter DJackson, NRO KManoly, NRR RidsNrrDorl CMunson, NRO LYong, NRR RidsOpaMail JAke, RES RidsNrrLASLent RidsNroDsea RidsNroOd RidsRgn1 MailCenter RidsNrrDe ADAMS Accession No.: ML15895A260 *Concurrence via e-mail OFFICE NRR/JLD/JHMB/PM NRR/JLD/LA NRR/JLD/JHMB/BC NRR/JLD/PMB/PM NAME SWyman Slent MShams NDiFrancesco DATE 10/27/2015 10/30/2015 11/3/2015 11/4/2015