ML23173A046

DNPS SLR Pre-submittal Meeting Presentation Rev. 1

ML23173A046
Person / Time
Site:	Dresden
Issue date:	06/28/2023
From:	Exelon Generation Co
To:	NRC/NRR/DNRL
References
Download: ML23173A046 (1)

Text

Dresden Nuclear Power Station Subsequent License Renewal Application Pre-Submittal Meeting June 28, 2023

Agenda

Introductions

General Plant Information 10 CFR Part 54 Safety Application Approach Scoping and Screening Aging Management Review Aging Management Programs TLAA and Exemption Identification Operating Experience Lessons Learned/Discussion Topics Project Management Schedule and Closing Remarks Questions and Answers 1

Introductions

Speakers Chris Wilson - Director, License Renewal Casey Muggleston - License Renewal Engineering Manager Participants Dennis Flores - LR Site Lead Iba Ello-Fletcher - Licensing Lead John Hilditch - Project Manager 2

Dresden Nuclear Power Station SLR Project Team Director, License Renewal (Chris Wilson)

Administrative Project Manager Coordinator (John Hilditch)

(Crystal Reynolds)

Environmental Lead Site Lead (Allison Stalker) (Dennis Flores)

LR Engineering Licensing Lead Manager (Iba Ello-Fletcher)

(Casey Muggleston)

Mechanical Electrical Structural TLAA Staff Staff Staff Staff 3

General Plant Information Dresden Nuclear Power Station (DNPS)

A three-unit BWR plant:

Unit 1 (GE BWR-1) was officially retired on August 31, 1984, but its major structures are still present and intact.

Placed in a safe storage condition (SAFSTOR).

Unit 2 (GE BWR-3/Mark I Containment) is located on the site directly west of and adjacent to Unit 1.

Unit 3 (GE BWR-3/Mark I Containment) is located on the site directly west of and adjacent to Unit 2 The site is located northeast of Morris in Grundy County, Illinois.

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General Plant Information Power Uprate History Current rated core thermal power of 2957 MWt for each unit (Unit 2 and Unit 3).

Original licensed core thermal power of 2527 MWt.

Extended Power Uprate approved in 2001 (Amendment Nos. 191 (Unit 2) & 185 (Unit 3), approximately 17% Uprate)

Current gross electrical output of 1003 Mwe for each unit (Unit 2 and Unit 3), for a total of 2006 Mwe.

Overview of Initial License Renewal Initial License Renewal Application was submitted on January 3, 2003 and approved on October 28, 2004. It was submitted as a combined application with Quad Cities Nuclear Power station. DNPS SLR will be submitted independently.

Unit 2 entered PEO on December 22, 2009 and Unit 3 entered PEO on January 12, 2011 Renewed Operating Licenses expire on December 22, 2029 for Unit 2, and on January 12, 2031 for Unit 3.

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General Plant Information Major Plant Structures

1. Unit 1 Reactor Building

2. Unit 1 Turbine Building

3. Unit 2 Turbine Building

4. Unit 3 Turbine Building

5. Unit 2 Reactor Building

6. Unit 3 Reactor Building

7. Administrative Building

8. U3 HPCI & U2/3 Diesel Generator Building

9. Unit 2/3 Cribhouse

10. 138 kV Switchyard

11. Unit 1 ISFSI Pad

12. Unit 2/3 ISFSI Pad

13. Station Blackout Building 6

10 CFR Part 54 Safety Application Approach Regulatory Guidance The Subsequent License Renewal Application (SLRA) format and content is based on:

NUREG-2192, Standard Review Plan for Review of Subsequent License Renewal Applications for Nuclear Power Plants, Revision 0 NUREG-2191, Generic Aging Lessons Learned for Subsequent License Renewal (GALL-SLR) Report, Revision 0 Regulatory Guide 1.188, Standard Format and Content for Applications To Renew Nuclear Power Plant Operating Licenses, Revision 2 SLR Interim Staff Guidance (ISGs) 7

10 CFR Part 54 Safety Application Approach 8

10 CFR Part 54 Safety Application Approach Utilized NEI 17-01, Industry Guideline for Implementing the Requirements of 10 CFR Part 54 for Subsequent License Renewal, Revision 0 Comprehensive Scoping & Screening was performed Aging Management Reviews (AMRs)

Identification of Potential Aging Effects Identification of Aging Effects Requiring Management Review of Operating and Maintenance History Identification of Aging Management Programs Aging Management Programs (AMPs)

Goal is to maximize consistency with GALL-SLR Time Limited Aging Analyses (TLAAs)

Keyword search of licensing basis documents to identify potential TLAAs Comparison of the Dresden identified potential TLAAs to SLR guidance documents Comparison of the Dresden identified potential TLAAs to other SLR applicants Review of applicable BWRVIP documents Operating Experience Initial review period: 01/01/2013 through 12/12/2022; will perform gap review prior to submittal.

No new aging effects identified to date 9

10 CFR Part 54 Safety Application Approach AMPs applicable to Dresden Nuclear Power Station(1)

DNPS will have 47 AMPs 35 are existing programs 24 existing programs will be enhanced for SLR purposes 12 are new programs No site-specific AMPs AMPs Not Applicable to Dresden Nuclear Power Station(1) (does not include PWR specific AMPs)

X.S1, Concrete Containment Unbonded Tendon Prestress XI.M22, Boraflex Monitoring XI.S2, ASME Section XI Subsection IWL XI.E5, Fuse Holders (1) - Preliminary Information 10

10 CFR Part 54 Safety Application Approach Preliminary AMP results:

AMPs AMPs AMPs with AMPs with Plant Consistent with Exception without Exception and Specific with GALL-SLR Enhancements Enhancement Enhancement AMPs Existing 35 9 18 2 6 0 New 12 9 N/A 3 N/A 0 Total 47 AMPs 11

Lessons Learned Lessons learned from previous Constellation and industry license renewal projects are being utilized in the DNPS SLRA Project Constellation has extensive aging management experience 20 of 21 units have renewed operating licenses 12 units are operating in the period of extended operation Constellation participates in NEI and EPRI initiatives related to License Renewal & Long-Term Operations The Constellation DNPS SLRA Project Team consists of experienced technical personnel Current NRC Expectations and Guidance Constellation reviews Breakout Questions, RAIs/RCIs, and Supplements associated with recent license renewal applications to ensure consistency with current NRC expectations and SRP guidance An Industry Peer Review of the SLRA will be performed 12

Project Management Constellation plans to submit the SLRA, including the Environmental Report (ER),

via the NRC Electronic Information Exchange (EIE)

Constellation intends to utilize the Scientech eDocs portal to support NRC review.

Documents such as:

SLRA, ER, boundary drawings, UFSAR, and FPP will be available on the eDocs portal.

Constellation Licensing Lead will coordinate with the NRC PM Audit Support Constellation will work with the NRC PM to establish and manage the schedules Constellation will track NRC audit questions, requests, and the responses in a database Site lead will coordinate plant walkdowns and other on-site activities RAI Responses Constellation will submit timely responses to NRC requests for additional information 13

Schedule and Closing Remarks The DNPS SLR application will be consistent with GALL-SLR to the greatest extent possible The DNPS SLR application will be consistent with industry practices and lessons learned from recent LRs/SLRs to meet NRC requirements Constellation will submit a high-quality application that can support an efficient staff review Recent industry RAIs will be addressed in the SLR application Timely RAI responses Frequent NRC interface The DNPS SLR application is on track to be submitted on the target date of April 17, 2024 14

Questions 15