April 28, 2016 

U.S. Nuclear Regulatory Commission Public Meeting Summary 

Title: Public Meeting with NextEra Energy Seabrook, LLC Regarding Aging Management of 

Alkali-Silica Reaction Pertaining to the License Renewal of Seabrook Station, Unit 1. 

Meeting Identifier: 20160552

Date of Meeting: Thursday, April 28, 2016 

Location: NRC One White Flint North, Room T-8E8 

11555 Rockville Pike 

Rockville, MD 

Type of Meeting: Category 1 

Purpose of the Meeting: 

The purpose of this public meeting was for NextEra Energy Seabrook, LLC (NextEra) to 

discuss their plan to address the U.S. Nuclear Regulatory Commission (NRC) staff’s 

concerns related to the aging management of alkali-silica reaction (ASR) for Seabrook 

Station Unit 1 (Seabrook) license renewal. 

General Details: 

The NRC held a meeting on April 28, 2016, from 9:00 a.m. - 12:00 a.m. EST. The 

meeting began with an introduction of all attendees and a review of meeting ground 

rules for category 1 meetings. Jane Marshall, Deputy Director of the Division of License 

Renewal, provided opening remarks emphasizing the importance of achieving a clear 

technical understanding between NextEra and the NRC staff regarding the ASR issues 

related to license renewal and the path forward for the aging management program 

(AMP) for ASR. 

NextEra and the staff engaged in a technical discussion regarding NextEra’s plan to 

update the ASR Monitoring Program AMP to address the staff’s concerns. Following the 

discussion, the meeting was opened for the public to interact with NRC staff. 

Approximately 27 people participated in the meeting. No members of the public 

attended the meeting in person or identified themselves during the teleconference. 

Meeting participants included representatives from NextEra Energy Seabrook, LLC, 

NextEra corporate, MPR Associates, and the NRC staff. 

Summary of Presentation (Meeting): 

The NRC project manager for the review of the Seabrook license renewal application 

provided a brief overview of the generic license renewal review process, the current 

status of the review for Seabrook, and the open item related to ASR. NextEra then 
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presented their prepared slides as provided in the attachment (ML16146A200). 

Significant technical points of discussion are listed below: 

• NextEra stated that all MPR/University of Texas (UT) test programs are complete, 

and the Owner’s Acceptance Review of the test reports is in progress. 

• NextEra stated that while Seabrook-specific research performed by UT was 

complete, the AMP would be updated to include provisions to evaluate and 

incorporate industry-wide research and operating experience as they become 

available. NextEra also stated that the ASR Monitoring Program AMP will be 

submitted as complete once UT research results are integrated, and it is not 

dependent upon ongoing industry research. NextEra agreed to provide a thorough 

description in the final safety analysis report (FSAR) supplement and the AMP 

operating experience section of how future industry research would be incorporated 

into the program, as well as a commitment to incorporate this research.

• NextEra agreed to include within the AMP a plan to provide in-plant corroboration of 

the methodology in MPR-4153 to correlate large-scale test results with the 

performance of ASR-affected Seabrook structures, with a description of the 

methodology used. 

• The staff requested clarification on whether misaligned or distorted equipment is the 

parameter monitored to provide indications that cracking leading to building 

deformation is occurring. NextEra stated that misaligned or distorted equipment is 

only used as an indicator, and that the actual parameters monitored in accordance 

with the AMP are the structures themselves, via measurements from combined 

cracking indexing, extensometers, etc. NextEra agreed to clearly indicate in the 

AMP what parameters will be monitored, and the distinction between structural and 

non-structural components. 

• The staff stated that it expects that the methodology derived from the Texas testing 

for use in the ASR AMP will be validated (corroborated) by data and observations 

from Seabrook structures. NextEra stated that in addition to the data from Texas 

testing, other data needed to support the ASR AMP will be presented in the revised 

ASR AMP with descriptions relative to either (a) microcracking that was described in 

the 2012 SER with open items or (b) global manifestations (macro-cracking or 

building deformation) that were identified in 2015, to avoid inconsistencies in 

technical descriptions. 

Public Participation Themes: 

There were no comments or questions during the public interaction period. No members 

of the public attended the meeting in person or participated in the teleconference. 

Next Step: 

NextEra plans to have a license amendment request pre-application meeting on ASR 

during the month of June 2016. NextEra plans to submit the revised ASR Monitoring 

Program AMP in July 2016. 
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Attachments: 

• Meeting description and agenda – ML16109A004 

• Attendance List – ML16146A193 

• Seabrook presentation – ML16146A200 
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Attachments: 

• Meeting description and agenda – ML16109A004 

• Attendance List – ML16146A193 

• Seabrook presentation – ML16146A200 

DISTRIBUTION: 

Listserv 

Lois James U.S. Nuclear Regulatory Commission (NRC) 

Yoira Diaz-Sanabria NRC 

Brian Wittick NRC 

George Thomas NRC 

Angela Buford NRC 

Justin Poole NRC 

Fred Bower NRC 

Matt Ring NRC 

Jenny Weil NRC 

Larry Nicholson NextEra Energy Seabrook, LLC (Seabrook) 

Michael Ossing Seabrook 

Edward Carley Seabrook 

Ken Browne Seabrook 

Brian Brown Seabrook 

ADAMS Accession No.: ML16146A176 *concurred via email 

OFFICE LA:RPB:DLR PM:RPB1:DLR RASB:DLR OGC(NLO) BC:RPB1:DLR 

NAME IBetts TTran/JMitchell BWittick MRing YDiaz-Sanabria 

DATE 5/ 26 /2016 6/ 1 /2016 6/ 1 /16 6/ 7 /16 6/ 7 /2016 

OFFICE RECORD COPY