ML20206L362
| ML20206L362 | |
| Person / Time | |
|---|---|
| Issue date: | 07/24/2020 |
| From: | Anna Bradford Office of Nuclear Reactor Regulation |
| To: | |
| Betancourt L, NRR, 415-6146 | |
| Shared Package | |
| ML20206L360 | List: |
| References | |
| Download: ML20206L362 (17) | |
Text
2018 International Congress on Advances in Nuclear Power Plants Subsequent License Renewal:
Is 80 the new 60?
Anna Bradford, Director Division of New and Renewed Licenses Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission
- License renewal principles continue to be effective:
- Regulatory process ensures the CLB provides and maintains an acceptable level of safety
- Each plants licensing basis must be maintained
- Identification of aging management needs for the 60 to 80 year operating period
- Technical reviews ensure effective aging management 2
SLR Review Process and Inputs into NRC Licensing Decision 3
Environmental Review (10 CFR 51)
NRC Renewal Decision (10 CFR 50.29)
SLR Application Accepted Safety Review (10 CFR 54)
ACRS Recommendation (10 CFR54.25)
Hearings*
10 CFR 2
- If a Request for Hearing is Granted
SLR Guidance GALL-SLR Report (NUREG-2191):
Provides acceptable methods to manage aging effects
Plant-specific alternatives may be proposed SRP-SLR (NUREG-2192):
Provides guidance to NRC staff reviewers to perform safety reviews of SLR applications 4
Technical Issues for Operations Beyond 60 Years Reactor pressure vessel neutron embrittlement at high fluence Irradiation-assisted stress corrosion cracking of reactor internals and primary system components Concrete and containment degradation Electrical cable qualification, condition monitoring and assessment 5
SLR Applications 6
Turkey Point Units 3 & 4 (FL)
Renewed License Issued December 2019 Peach Bottom Units 2 & 3 (PA)
Renewed License Issued March 2020 Surry Units 1 & 2 (VA)
Current expiration 2032 & 2033 Under review If approved, SLR adds an additional 20 years for up to a total operating life of 80 years.
SLR Prospective Applications 7
49 more units forecasted
- Lessons learned so far:
- Reviews can be completed in 18-months
- Pre-submittal meetings improve coordination
- Use of technology helped with effectiveness of audits
- More effective use of audits reduced requests for additional information
- Need for on-site audits minimized
- Maintained flexibility with milestones SLR Continuous Improvement 8
SLR Risk-Informing Activities
- Identify in pre-submittal meetings areas that will require additional review resources
- Conduct acceptance reviews with an integrated team
- Eliminate the on-site operating experience audit 9
SLR Risk-Informing Activities
- Capture audit activities in a single Aging Management Audit
- Part 1: In-Office Technical Review
- Part 2: On-Site Audit
- Part 3: In-Office Audit Breakout Sessions 10
SLR Path Forward
- Assess electrical, mechanical and structural GALL-SLR ISGs public comments
- Implement lessons learned and risk-informing activities in upcoming SLRAs reviews
- Continue public meetings on lessons learned and guidance updates 11
What Limits License Renewal to 20 Years?
Atomic Energy Act limits licenses to 40 years Remaining time on current license plus license renewal period 10 CFR § 54.31(b) caps the additional period covered by renewed licenses at 20 years Statement of Considerations in 1991 contemplated revisiting as experience with licensee performance in managing age-related degradation during the renewal term is gained 94 licenses have been renewed with more than 320 reactor-years operation beyond their initial 40-year licenses 4 units with licenses to 80 years 12
Why License Renewal for 40 Years?
6 units have initial 40-year licenses Guidance in place to manage aging effects to 80 years 87 units have 60-year licenses 43 units beyond 40 years and eligible to apply for SLR Efficiencies:
Applicants prepare one application for 40 years Promotes continuity in plant implementation of AMPs for 40 years NRC review of one application for 40 years Can focus on oversight of AMP implementation 13
What is Needed for 40-Year License Renewal?
Staff at initial stages of identifying changes and challenges Legal/regulatory: 20-year license renewal limit, 40-year license limit Environmental review: GEIS covers 20 years Safety review: identification of aging effects and management programs currently for 80 years only (e.g., GALL-SLR)
Inspections/oversight: need for additional oversight with elimination of 20-year LR application review?
Possible public meeting in late 2020 to seek stakeholder input 14
15 Questions?
Acronyms ACRS - Advisory Committee on Reactor Safeguards AMP - Aging Management Program CLB - Current Licensing Basis GALL - Generic Aging Lessons Learned GEIS - Generic Environmental Impact Statement ISGs - Interim Staff Guidance NEI - Nuclear Energy Institute PWR - Pressurized Water Reactor SER - Safety Evaluation Report SLR - Subsequent License Renewal SRP - Standard Review Plan 16
Contact Information
- Anna Bradford, Director Division of New and Renewed Licenses Office Nuclear Reactor Regulation
- Address:
U. S. Nuclear Regulatory Commission Mailstop O-11F1, Washington, DC 20555
- Email: Anna.Bradford@nrc.gov
- Phone: 1-301-415-1560 17