ML21034A556
| ML21034A556 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 01/26/2021 |
| From: | NRC/NRR/DNRL/NLRP |
| To: | |
| Wu A - NRR/DNRL/NLRP | |
| Shared Package | |
| ML21034A553 | List: |
| References | |
| DNRL-21-0016 | |
| Download: ML21034A556 (21) | |
Text
For Information Purposes Only Duke Energy Oconee Nuclear Station Subsequent License Renewal Safety Application Pre-Submittal Meeting January 26, 2021 1
For Information Purposes Only Opening Remarks/Background Overview of Oconee Nuclear Station Safety Application Approach/Management Overview of Integrated Plant Assessments Overview of Aging Management Programs Overview of Time Limited Aging Analyses Questions/Closing Remarks Agenda 2
For Information Purposes Only Speakers Rounette Nader (Duke Energy)
Greg Robison (Duke Energy)
Attendees/Safety SLRA Contributors Duke Energy SLR Team Key Vendors
Structural Integrity Opening Remarks/
Background:
Introductions
3
For Information Purposes Only Licensing/EHS Paul Guill Reene Gambrell Arun Kapur Rounette Nader Director Nuclear Engineering - License Renewal Decommissioning Funding Portfolio Project Support Ed Asbury Quentin Holston Joyce Roberts Richard Browder Manager Nuclear Engineering License Renewal Implementation Greg Robison Manager Nuclear Engineering Subsequent License Renewal Vendors Structural Integrity Framatome CERTREC James Thornton Jason Sisk Matthew Walker Jeff Lane Dave Kulla Phil Kohn Opening Remarks/
Background:
Introductions
Engineering Class1/TLAA Joe Terrell Daniel Roberts Mechanical Chris Saville David Lee Erik Wagner Mark Hager Programs Lori Hekking Casey Muggleston Gary Wald Civil David Morris Heather Galloway Dave Peltola Electrical Bert Spear Steven Graham 4
For Information Purposes Only
As we plan to meet our customers future energy needs and continue to reduce our carbon footprint, we are seeking to renew the licenses of the 11 nuclear units we operate at six plant sites in the Carolinas
This provides the option to operate these plants for an additional 20 years
Relicensing our nuclear fleet is critical to meet Duke Energys goal of net-zero carbon emissions by 2050
We expect to submit the license renewal application for Oconee Nuclear Station in March 2021 Opening Remarks/
Background:
Duke Energy 5
Opening Remarks/
Background:
Nuclear Fleet Duke Energy Carolinas Service Area Duke Energy Progress Service Area Overlapping Areas Each Duke nuclear unit has obtained renewed licenses to operate beyond 40 years.
Fleet Subsequent License Renewal (SLR) Timeline Oconee Robinson McGuire Brunswick Harris Catawba 2018 2020 2025 2030 2035 2040 2045 X
Prepare SLR Application NRC Review X
X X
X X
Period of Extended Operation (PEO)
Period of Extended Operation (PEO)
Period of Extended Operation (PEO)
Period of Extended Operation (PEO)
Period of Extended Operation (PEO)
Period of Extended Operation (PEO)
- Duke Energy owns 100% of all units except the Catawba units.
6
For Information Purposes Only
ONS is a three-unit, B&W NSSS, PWR plant
Station Output: 2554 MWe
ONS Initial Renewed License was issued May 23, 2000 (Pre-GALL Plant)
Emergency power supplied by Keowee Hydro
SSF is backup to existing safety systems (additional defense in depth)
MUR LAR submitted February 19, 2020 Overview of Oconee Nuclear Station: Plant OLs 40 Yrs 60 Yrs 80 Yrs Unit 1 1973 2013 2033 2053 Unit 2 1973 2013 2033 2053 Unit 3 1974 2014 2034 2054 7
Initial License Renewal Application submitted July 7, 1998 and was approved May 23, 2000
IP-71003, Phase 1: Unit 1 completed April 14, 2011; Unit 2 completed November 30, 2011; Unit 3 completed June 2, 2014
IP-71003, Phase 2 completed August 23, 2012
Entered PEO 2013 (Units 1 & 2) and 2014 (Unit 3)
IP-71003, Phase 4 scheduled for June 2022 Overview of Oconee Nuclear Station:
Initial License Renewal 8
Plant Reliability -
2020 capacity factor - 96.02%
Ten-year average capacity factor - 95%
Plant Performance - All three units in Column 1 of NRC Action Matrix
Plant Enhancements - Over $4 billion on capital improvements since initial LR approval
Notably, last two cycles for Unit 2 have been successive breaker-to-breaker runs with the last Unit 2 reactor scram in 2008 Overview of Oconee Nuclear Station:
Plant Operation 9
For Information Purposes Only Use of Contemporary Guidance Comprehensive Scoping & Screening was performed based on NUREG-2192, NEI 17-01, and Regulatory Guide 1.188 Integrated Plant Assessment results will be presented consistent with contemporary style and detail SLR AMPs have been harmonized with NUREG-2191 Use of SLR Lead Plants Lessons Learned Lessons learned from previous SLRA submittals were applied, including review of RAIs to understand current NRC expectations Oconee SLR Team participation in NRC-related SLR meetings and conferences Safety Application Approach 10
Peer Reviews Participated in peer reviews of other SLRA submittals A peer review of ONS SLRA is being performed
Application Processing CERTREC Electronic Reading Room Portal to support NRC review Support NRC LR Project Manager throughout the NRC Review process
Frequent project calls
Support in-office and on-site Audits
Ensure RAI/RCI Responses meet NRC schedules Safety Application Management 11
Scoping & Screening
ONS approach utilized a full review, not a gap approach
Methodology related to (a)(2) scoping was consistent with current standards resulting in more systems scoped-in
Screening of electrical and I&C components used a bounding approach as described in NEI 17-01
Selected structural items and electrical components were scoped and screened as commodities and assigned to commodity groups based on NUREG-2192, Table 2.1-6 Overview of Integrated Plant Assessment Scoping & Screening 12
Overview of Integrated Plant Assessment Aging Management Review
The aging management review aspects of the Integrated Plant Assessment were performed to current standards NEI 1701 methodology utilized throughout IPA process Results from the aging management review are presented in the standard 9 column table format
AMR Highly Consistent with GALL-SLR: > 99% with A through E notes (approximately 9200 line items)
SLRA PlantSpecific reviews for the NUREG-2192 Further Evaluation GALL items provided in SLRA and resulted in aging management considerations 13
Forty-eight (48) AMPs developed to maximize consistency with NUREG-2191 (GALL-SLR)
Enhanced several existing AMPs to be consistent with GALLSLR AMPs
AMP Detailed Development Use of GALL-SLR guidance for program elements Informed through review of Industry RAIs and participation in Industry Peer Reviews AMP Effectiveness Reviews performed on existing AMPs using elements of NEI 1412
Industry OE and 10 years of plantspecific OE reviewed Informed and verified effectiveness of AMPs No new aging effects identified Overview of Aging Management Programs 14
For Information Purposes Only Oconee SLR - 47 GALLAMPs & 1 Plant-Specific AMP Overview of Aging Management Programs Consistent with GALL Consistent with Enhancement With Exception Only With Exception and Enhancement Plant Specific Existing 34 8
18 2
5 1
New 14 13 0
1 0
0 Total 48 15
Key AMP Specifics GALL AMP not required - High Voltage Insulators Structural AMPs address alkali-silica reaction (ASR) and irradiation of concrete NRC Interim Staff Guidance (ISG)
Draft guidance affecting Mechanical, Structural and Electrical AMPs has been addressed
Final guidance for the Reactor Internals AMP has not been incorporated. Duke continues to evaluate how best to address Oconee has one plant-specific AMP, Secondary Shield Wall Tendons aging management program.
Overview of Aging Management Programs 16
Overview of Time Limited Aging Analyses
TLAA Identification and Evaluation
10CFR 54.21(c) requires that an evaluation of TLAA be provided as part of the Oconee SLR Application
The six criteria from 10 CFR 54.3(a) were used to identify the Oconee TLAA evaluated in Section 4 of the Application
Forty-two (42) TLAA or categories of TLAA were identified with many evaluations being grouped in order to demonstrate acceptability for 80 years of operation in accordance with 10 CFR 54.21(c)(1)
No exemptions pursuant to 10 CFR 50.12 have been granted based on a TLAA as defined in 10 CFR 54.3 17
Key TLAA Specifics
Reactor vessel
Oconee is the first SLR applicant with B&W NSSS, but not first B&W-manufactured reactor vessel reviewed by NRC for SLR
TLAA demonstration for the reactor vessel is comprehensive and consistently aligned with ongoing practice at Duke and among the owners of B&W reactor vessels
Aging management programs for Reactor Vessel Materials Surveillance and Neutron Fluence Monitoring are cornerstone reactor vessel programs for SLR Overview of Time Limited Aging Analyses 18
Key TLAA Specifics
Metal Fatigue TLAA Evaluations include:
Class 1 fatigue analyses
Non-class 1 fatigue analyses
Environmentally-Assisted Fatigue
Various analytical evaluation of flaws - real and postulated, including ISI indications and LBB assumptions
Containment Liner Plate Penetration Fatigue
Only New SLR TLAA is Reactor Internals materials work related to MRP-227 Overview of Time Limited Aging Analyses 19
Oconee SLR application will be consistent with GALL-SLR and Industry Guidance to the greatest extent possible
Duke Energy has been engaged with the development of SLR industry guidance and SLR-ISGs
Duke Energy has supported recent and SLR application reviews and incorporated recent RAI responses
Duke Energy will submit a high quality SLR application to support an 18 month staff review
Oconee SLRA submittal remains on schedule to submit 1Q21 Closing Remarks 20
For Information Purposes Only
AMP - Aging Management Program
AMR - Aging Management Review
B&W - Babcock and Wilcox
CFR - Code of Federal Regulations
GALL - Generic Aging Lesson Learned
IP - Inspection Procedure
IPA - Integrated Plant Assessment
ISG - Interim Staff Guidance
LAR - License Amendment Request
LR - License Renewal
MUR - Measurement Uncertainty Recovery
NEI - Nuclear Energy Institute
NRC - Nuclear Regulatory Commission Acronyms
NUREG - Nuclear Regulatory Guide
NSSS - Nuclear Steam Supply System
OE - Operating Experience
OL - Operating License
ONS - Oconee Nuclear Station
PEO - Period of Extended Operation
PWR - Pressurized Water Reactor
RAI - Request for Additional Information
RCI - Request for Confirmation of Information
SSF - Standby Shutdown Facility
SLR - Subsequent License Renewal
SLRA - Subsequent License Renewal Application
TLAA - Time Limited Aging Analysis 21