ML22130A128

Annual Assessment Meeting for Seabrook Station - NRC Presentation Slides

ML22130A128
Person / Time
Site:	Seabrook
Issue date:	05/10/2022
From:	NRC/RGN-I/DORS
To:
Young M
References
Download: ML22130A128 (22)

Text

Seabrook Station Annual Assessment Meeting Welcome!

This meeting will start at 5:30pm.

Seabrook Station Annual Assessment Meeting Reactor Oversight Process - 2021 May 12, 2022 2

Seabrook Annual Assessment Meeting Meeting Facilitator Brett Klukan Regional Counsel, Region I 3

Meeting Conduct

• Please respect other members of the public

• Please be conscious of your speaking time

• Questions will be addressed during the Question-and-Answer session following the presentation.

4

Agenda - Seabrook Dan Collins Director, Region I Division of Operating Reactor Safety

• 2021 ROP Plant Performance Assessment and Inspection Activities

• Current NRC COVID-19 response

• NRC Inspection of Alkali-Silica Reaction (ASR)

• Public Question and Answer Session 5

NRC Panelists Chris Newport Travis Daun Nik Floyd Sr. Resident Inspector Resident Inspector Senior Inspector Mel Gray Matt Young Engineering Branch Chief Branch Chief 6

NRC Independent Safety Inspections Reactor Oversight Process

• Full-time NRC resident inspectors

• NRC specialists conduct additional inspections at each nuclear plant

• NRC inspectors have unfettered access to all plant activities related to nuclear safety and security 7

NRC Independent Safety Inspections Action Matrix Concept 8

2021 ROP Plant Performance Assessment at Seabrook

• Operated safely and in a manner that preserved the public health and safety and protected the environment

• All Green Performance Indicators

• All Very Low Safety Significance Findings

• The plant will receive the baseline level of inspection in 2022 9

2021 NRC Inspection Activities at Seabrook

• ~6000 hours of inspection and related activities

- Examples of Resident Inspections

• maintenance activities

• surveillance tests

• operator performance in the simulator

• emergency preparedness drills

- 2021 Team Inspections

• Design Basis Assurance

• Security

• Radiation Protection

• Evaluation of Modifications (50.59)

• Refueling Outage Activities 10

NRC Actions in Response to COVID-19

• Monitored plant activities through inspections and oversight

• Maintained emergency response capabilities within Regional Incident Response Centers and NRC HQ

• NRC resident inspectors currently full time on-site 11

NRC Inspection of ASR at Seabrook

• In 2021, the NRC completed inspections to assess NextEras performance to manage the effects of ASR in Seabrook structures

- ASR inspections completed in each quarter

- Resident inspectors and specialists from Region I and NRC Headquarters involved

- Focused on compliance with NRC-approved methodology and license conditions

• NRC inspections in 2021 determined Seabrook structures remain capable of performing their safety functions

• NRC inspectors identified two findings of very low safety significance 12

NRC Inspection of ASR at Seabrook

• 2Q2021 - Finding related to not adequately accounting for future ASR trends in operability determinations

• 4Q2021 - Finding related to not properly evaluating ASR-related indications in the Containment Internal Structure per the Structures Monitoring Program 13

Seabrook Annual Assessment Meeting Closing Remarks 14

NRC Social Media Channels

• Facebook: www.facebook.com/nrcgov

• Flickr: www.flickr.com/photos/nrcgov/

• Twitter: twitter.com/#!/nrcgov

• YouTube: www.youtube.com/user/NRCgov

• RSS: www.nrc.gov/publicinvolve/listserver.html#rss

• LinkedIn: www.linkedin.com/company/u-s--nuclearregulatory-commission/

15

Annual Assessment Meeting Feedback

1. Mail in NRC 2. Scan QR Code on feedback form that - OR - back of form with will be emailed to smart device all attendees

- OR -

3. At any computer, go to the Public Meeting Schedule and press the Meeting Feedback link for this meeting - or - press the

[more] link for this meeting and then press the Meeting Feedback link on the Meeting Details page.

16

- OR -

4. Email Public Affairs - opa1.resource@nrc.gov 16

Question & Answer Session Question & Answer Session 17

Thank you for your participation

REFERENCE SLIDES NextEra Methodology for ASR Methodology Document Structural Analysis & Evaluation Monitoring Parameters and Limits Structures Monitoring Program Corrective Action 20

Reactor Cavity Diagram N West East Wall Wall Deck Keyway Grate /

Wall Floor Slab Opening Reactor Cavity Pit Overhead View Containment Side View 21

Structural Modification Examples Example 1 - Example 2 -

Strong backs Corner Braces 22