ML24040A168
| ML24040A168 | |
| Person / Time | |
|---|---|
| Issue date: | 02/13/2024 |
| From: | David Garmon-Candelaria NRC/NRR/DRA/ARCB |
| To: | |
| References | |
| RG-1.183, Rev 1 | |
| Download: ML24040A168 (1) | |
Text
Public Workshop (2 of 3)*
Update to RG 1.183, Revision 1 - Alternative Radiological Source Terms for Evaluating Design Basis Accidents at Nuclear Power Reactors February 13, 2024 ADAMS Accession No. ML24040A168
- Workshop 1 info - https://www.nrc.gov/pmns/mtg?do=details&Code=20231392
Introductions
2 Please ensure to identify yourself before speaking throughout the meeting.
NRC Opening Remarks Michael Franovich, Director Division of Risk Assessment Office of Nuclear Reactor Regulation 3
Workshop Agenda Workshop Format Project Schedule Non-LOCA Release Fraction Calculations External Presentations (as applicable)
Break Discussion 4
Workshop Format 5
86 FR 14964 - NRC Policy on Enhancing Participation in NRC Public Meetings Comment-Gathering Meeting - Purpose is for the NRC to obtain feedback on regulatory issues and NRC actions - in this case for an update to RG 1.183 Focused on allowing participants opportunity to provide opinions, perspectives and feedback NRC staff will take notes during meeting and use these notes to inform decision-making Meeting summaries will include high-level summaries of notes NRC staff has taken 5
RG 1.183 Update Stakeholder Involvement
- Public Workshops and Information Meetings
- 3 Workshops (1st held on 1/9/24)
- 2 Information Meetings
- Contact Project Lead
- Meeting Feedback
- ACRS Meeting - approximately November 2024
- Draft Guide Comment Period - approximately June 2025
- Relationship with Proposed Increased Enrichment Rulemaking
- Docket ID NRC-2020-0034, www.regulations.gov
- Comment period on Proposed Increased Enrichment Rulemaking Regulatory Basis ended on January 22, 2024 6
Project Schedule 7
Milestone Tentative Completion Public Workshops* and Information Meetings**
January 2024 - April 2024 DG Internal Review begins June 2024 DG Internal Review completed October 2024 Pre-Decisional DG Publicly Available to Support ACRS Briefings November 2024 ACRS Briefings (Staff to respond as needed)
November 2024 Increased Enrichment Proposed Rule package to Commission (will include DG referenced in SECY paper)
December 2024 DG Available for Public Comment via Proposed IAW Increased Enrichment Rulemaking SECY June 2025 (Estimated)
- The term Workshop means a Comment-Gathering Meeting as described in the NRCs policy statement on public meetings (see 86 FR 14964)
- The term Information Meeting means NRC will inform attendees and allow questions (see 86 FR 14964)
Non-LOCA Release Fractions Calculations Chris Van Wert, Senior Technical Advisor christopher.vanwert@nrc.gov Joseph Messina, Nuclear Methods and Fuel Analysis Engineer joseph.messina@nrc.gov Division of Safety Systems Office of Nuclear Reactor Regulation 8
Overview - Non-LOCA Release Fractions NRC Staff are currently performing calculations with FAST*, version 1.2 to revise Tables 3 and 4 of RG 1.183 Rev. 1 Calculations will consider release fraction examples for:
- 10x10 BWR assembly
- 14x14 PWR assembly
- 17x17 PWR assembly Preliminary results to be presented during the March workshop 9
- FAST (Fuel Analysis under Steady-State and Transients) is an analytical tool that calculates the thermal-mechanical behavior of nuclear fuel when given power and boundary conditions.
https://fast.labworks.org/file-download/download/public/636
Assumptions - Non-LOCA Release Fractions The revised Tables 3 and 4 of RG 1.183, Revision 1 will be determined using the following assumptions:
75 GWd/MTU burnup 6% enrichment Revised power history to cover new burnup range and similar integrated power Uses ANS 5.4 Standard and procedure from Appendix I of RG 1.183, Revision 1 The NRC Staff welcomes opinions, perspectives and feedback regarding the approach or assumptions being used to revise Tables 3 and 4 of RG 1.183, Revision 1 10
External Presentations 11
Break 12
Discussion 13
RG 1.183 Update Stakeholder Involvement
- Reminder -
- Public Workshops and Information Meetings
- 3 Workshops (1st held on 1/9/24)
- 2 Information Meetings
- Contact Project Lead
- Meeting Feedback
- ACRS Meeting - approximately November 2024
- Draft Guide Comment Period - approximately June 2025
- Relationship with Proposed Increased Enrichment Rulemaking
- Docket ID NRC-2020-0034, www.regulations.gov
- Comment period on Proposed Increased Enrichment Rulemaking Regulatory Basis ends on January 22, 2024 14
Contacts David Garmon, Project Lead/
Technical Contact david.garmon@nrc.gov 301-415-3512 Chris Van Wert, Technical Contact christopher.vanwert@nrc.gov 301-415-3217 https://www.nrc.gov/pmns/mtg?do=details&Code=20231392 How did we do?
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