ML23117A374

Northstar Lessons Learned Meeting Slides, May 2, 2023

ML23117A374
Person / Time
Site:	Vermont Yankee
Issue date:	05/02/2023
From:	NorthStar Group Services
To:	Reactor Decommissioning Branch
Hood T
References
Download: ML23117A374 (15)

Text

Decommissioning Lessons Learned NorthStar Vermont Yankee Project May 2, 2023 1

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VY: GE 3/4 BWR with Mark I Containment Constructed 1967-1971 Operation 1972-2014 Original design 1592 MWt (540MWe) uprated in 2006 to 1912MWt (620MWe)

Vermont Yankee has a small footprint compared to many commercial nuclear facilities:

Site property is approximately 140 acres Original Operating Protected Area is 12 acres ISFSI Protected Area 1.3 acres 2

Commercial Operations began in 1972 January 11, 2019 December 29, 2014 Acquired by Permanent Shutdown NorthStar February 5, 2015 August 27, 2013 Implement Post-Shutdown 2018 Emergency Plan April 2016 Entergy announces it Implemented ISFSI Emergency will cease operations Implemented Plan Permanently Defueled Emergency Plan 2013 2014 2015 2016 2017 2018 2019 2020 SAFSTOR I September 23, 2013 Entergy submits SAFSTOR II notification of intent to cease operations to the ISFSI Operations NRC January 12, 2015 Fuel permanently removed from reactor vessel 3

December 29, 2014 Permanent Shutdown

• Exemption Request re 10 CFR 72.212 (CoC

• LAR - Mitigation Strategy License Condition Note 19) Commercial Operations LAR - Cyber Security Implementation Schedule

• 10 CFR 20.2002 Alternate Disposal Request began in 1972

• LAR - Defuel Tech Specs (Certified Fuel handler) U.S. Ecology - Idaho

• Irradiated Fuel Management Plan (IMFP)

• Decommissioning Cost Estimate (DCE)

• Post Shutdown Decom Activities Report (PSDAR)

• Exemption Request for Security Training and Exemption Request Insurance 10CFR50.54(NEIL)

Exemption Request Insurance 10CFR140 (ANI)

February 5, 2015 Force-on-Force Exercises

• LAR - Post Shutdown Emergency Plan Implement Post-Shutdown Emergency Plan 2018 August 27, 2013 April 2016 Implemented ISFSI Emergency Entergy announces it will cease Implemented Plan operations Permanently Defueled Emergency Plan 2013 2014 2015 2016 2017 2018 2019 2020 SAFSTOR I September 23, 2013 SAFSTOR II Prompt Decommissioning Entergy submits

• LAR - Emergency Plan all Fuel in SFP (14) notification of intent to

• Exemption Request Commingled Funds Request

• ISFSI Physical Security Plan cease operations to the

• Exemption Request -

• ISFSI Emergency Plan and EALs ISFSI Operations NRC Records Retention

• LAR - Emergency Plan (Zirc

• Tech Specs Permanent fire window) Removal of Fuel from SFP

• QAPM Reduction in Commitments for ISFSI Ops January 12, 2015

• Exemption Request Re 10 Fuel permanently removed CFR 72.212 (2 Yrs. cooled fuel, High DHR) from reactor vessel

• LAR - Cyber Security Milestone 8 Extension

• License Transfer Application 3

NorthStar Group Services, Inc.

Nationwide Branch Network

• Leading provider of highly technical infrastructure and environmental services in the United States

• Founded 1986

• Over 30 Offices Nationwide

• Safety - 2022 EMR 0.69

• Backlog exceeds $3 billion

• Annual Revenue more than $1 billion Corporate Headquarters - New York City * $10 billion in projects since 1986 Regional Offices:

• 7,500+ Annual Projects Austin, Boston, Chicago, Cincinnati, Dallas, Denver, Los Angeles, NYC/New

• Largest Integrated Decommissioning Jersey, Houston, Orlando, Philadelphia, and Demolition Company in the Portland, San Francisco, Seattle, Tampa World 5

With NorthStar safety is not just a goal, it is a responsibility. With statistics below the industry average for 25 years, safety is one of Northstars main competitive advantages.

NorthStar remains committed to delivering quality work with the safety and health of our employees as a top priority. This responsibility goes far beyond compliance with regulatory requirements, exceeding minimum standards, and helps us to achieve sustainable safe work environments on every project.

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• SAFETY with all we do: Target Zero (accidents)

Nuclear, Radiological, Environmental, Industrial Do it right. Do it safe.

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Reactor Vessel Segmentation with Orano GE BWR Mark I Reactor Vessel Reactor vessel and 5 1/2 thick forged carbon steel all internal walls, clad with stainless steel components have been disposed.

55 height (not including head) 17 internal diameter 3-D Modeling of reactor and associated components allowed Reactor Head alone 60 tons for significant optimization of (10 1/2 thick and 22 tall at cutting and packaging plans flange)

Reactor Vessel approx. 390 tons Work plan Sequence 8

Reactor Vessel Segmentation ALARA OE

• Select components evaluated as GTCC Waste were packaged into a single

• 17 spec built Custom Boxes dry cask for storage at the were used of 11 different VY ISFSI sizes

• Specialized tooling of

• Precise geometries were multiple varieties were used obtained during cutting to for cutting processes optimize packaging and self shielding of segmented

• Cutting and packaging work components was broken into sequences

• Most cutting operations

• Generally activities started at were performed the top of the vessel and underwater worked downward Work plan Sequence 9

VY Material Handling Safety OE 10

Recent VY Rail OE 11

Safety /Regulatory/Production Since VY ownership under NorthStar:

• 1.4 Million Person Hours worked (and counting) with no OSHA recordable lost time events

• Zero Cited Regulatory Violations

• On track to finish Decommissioning years ahead of 2030 committed completion date

• Shipping 3-4 rail cars per week to WCS (averaging about 11 per month)

• Total Number of Shipments to Date: 599

• Total Weight 66,955,320 lbs (34,478 tons)

• Total Activity 35,620 curies 12

Decommissioning Lessons Learned Crystal River 3 (CR3) 13

Decommissioning Lessons Learned Crystal River 3 (CR3)

CR3 Plant Information

• B&W PWR 2,609 MWt (860 Mwe)

• Operations 1977-2011; all fuel on pad in 2018

• NRC Operating License transferred from Duke Energy to Accelerated Decommissioning Partners (ADP) on October 1, 2020

• ADP: Joint Venture of NorthStar Group Services and Orano Decommissioning Holdings Decommissioning Status

• RV/RVI segmentation and packaging in Orano Optimized Segmentation using only 3 main large packages

• 2 GTCC canisters transferred to ISFSI

• Waste Shipments to WCS by rail ongoing with VY OE incorporated as lesson learned

• On track to finish ahead of 2027 target completion date 14

SIMPLE PRIORITIES SAFETY with all we do: Target Zero ( accidents)

Nuclear, Radiological, Environmental, Industrial Do it right. Do it safe.

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