ML25169A249
| ML25169A249 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 06/18/2025 |
| From: | Public Service Enterprise Group |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| EPID L-2025-LRM-0060 LR-N25-0057 | |
| Download: ML25169A249 (17) | |
Text
LR-N25-0057 Pre-Submittal Meeting Slides (Non-Proprietary)
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
2 Meeting Agenda Cobalt-60 Pre-Submittal Meeting
Introductions
Provide summary overview of scope of Co-60 program Describe outline and content of LAR
Change to Operating License Dose Consequence Evaluation Decay Heat Assessment Spent Fuel Pool Criticality COBA Testing to Date Digital Serialization Co-60 Implementation Schedule Questions / Comments Westinghouse Non-Proprietary Class 3 l © 2025 Westinghouse Electric Company LLC. All Rights Reserved.
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
3 Overview of Cobalt-60 Program Cobalt-60 Pre-Submittal Meeting Collaboration between Westinghouse and Nordion Provide a domestic supply of Co-60 for irradiation services
Gamma source for sterilization of single-use medical devices
Food and pharmaceutical ingredient irradiation
Global shortage in Co-60 sources Cobalt Burnable Absorbers (COBAs) inserted into fuel assemblies
Fuel insert similar to WABAs
Neutron irradiation of [
]a,c within each rodlet
[
]a,c
Core location of COBAs optimized for each cycle of irradiation COBA capsule harvesting in SFP by Westinghouse and shipped to Nordion
Blended with other Co-60 slugs to create finished sources of specific activity Westinghouse Non-Proprietary Class 3 l © 2025 Westinghouse Electric Company LLC. All Rights Reserved.
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
5 Outline / Content of LAR Cobalt-60 Pre-Submittal Meeting LAR to provide overview of key analyses and testing supporting COBA
Structural integrity
Thermal hydraulics
Vibration and wear
Mechanical creep
Corrosion
Analysis of COBA failure
Co-60 capsule positioning
Nuclear Design LAR sections will reference Westinghouse Supporting Information
General and Site-Specific Attachments to LAR - proprietary and redacted versions Site specific assessment and analyses
Chemistry sampling for Co-60
Co-60 impacts to Chapter 15 LOCA dose consequences
Dose and decay heat analysis for SFP and cask pit area
Decay heat addition to RCS for normal, upset and ELAP events Westinghouse Non-Proprietary Class 3 l © 2025 Westinghouse Electric Company LLC. All Rights Reserved.
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
6 License Changes Cobalt-60 Pre-Submittal Meeting Changes to Salem FOL
Allow for transfer/use of Co-60 in accordance with 10 CFR Part 30
Allow for production, possession, receipt and transfer of Co-60
Similar changes made for Hope Creek Co-60 initiative
Allows production & transfer of Part-30 source material within a Part-50 license
Describe COBA SFP storage requirements
Ensures gamma flux limits are within 1010 MeV/cm2-sec limit for SFP concrete Mark-ups of FOL changes in LAR attachment Westinghouse Non-Proprietary Class 3 l © 2025 Westinghouse Electric Company LLC. All Rights Reserved.
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
7 Dose Consequence Evaluations Cobalt-60 Pre-Submittal Meeting COBA design limits Chapter 15 Impact
Detection of Co-60 via routine RCS chemistry sampling
Co-60 source term non-gaseous
Only affects events with direct RCS release LOCA dose consequences revised for additional Co-60 source term
[
]a,c
Results of dose consequence analyses show a not more than minimal
(<10%) increase due to Co-60
Calculation changes performed under 50.59 Westinghouse Non-Proprietary Class 3 l © 2025 Westinghouse Electric Company LLC. All Rights Reserved.
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
8 Decay Heat and Gamma Energy Assessment Cobalt-60 Pre-Submittal Meeting Contribution of COBA decay heat evaluated
Normal Shutdown Cooling
Loss of RHR at Mid-loop / Natural Circ Cooldown
Flex Operation
SFP Cooling Sufficient cooling margin exists to accommodate additional COBA heat Westinghouse Non-Proprietary Class 3 l © 2025 Westinghouse Electric Company LLC. All Rights Reserved.
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
9 Decay Heat and Gamma Energy Assessment cont.
Cobalt-60 Pre-Submittal Meeting COBA decay heat/gamma energy accident analyses
Small and Large Break LOCA
LOCA Containment Integrity
Post-LOCA Long Term Cooling
Steam Line Break and Locked Rotor Steam Release Sufficient margin in all events to ensure adequate cooling COBA gamma energy incident on wall and floor of SFP and cask pit
Impact to SFP floor is minimal
Impact to SFP walls maintained by plant procedures based on time of offload Westinghouse Non-Proprietary Class 3 l © 2025 Westinghouse Electric Company LLC. All Rights Reserved.
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
10 10 Spent Fuel Criticality Analysis Cobalt-60 Pre-Submittal Meeting Plant specific SFP criticality analysis updated with RG 1.240 including operating with COBA Updates the new fuel storage area analysis WCAP report generated with all pertinent details
Pre-submittal meeting held with staff March 6, 2025
LAR S25-02 for new criticality analysis submittal June/July 2025 Presence of COBA treated as a conservative penalty in SFP criticality analysis Westinghouse Non-Proprietary Class 3 l © 2025 Westinghouse Electric Company LLC. All Rights Reserved.
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
11 11 COBA Testing to Date Cobalt-60 Pre-Submittal Meeting CFD Validation Testing
Performed at WEC Churchill facility at PWR conditions: pressure, temperature, thimble tube flow, capsule heating
Flow rates measured in COBA rodlet, and thimble tube are similar to flow rates predicted in prior CFD analysis and other hydraulic predictions
Confirms that boiling does not occur for expected normal operating conditions in reactor Wear Testing
Also performed at WEC Churchill facility at PWR conditions
Unlike CFD testing, capsule heating was excluded in place of production capsules and slugs
The first COBA article showed no discernable wear after 6 weeks of testing.
The second COBA article just completed a 3-month duration and is currently being evaluated.
Westinghouse Non-Proprietary Class 3 l © 2025 Westinghouse Electric Company LLC. All Rights Reserved.
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
12 12 Digital Serialization of Capsules Cobalt-60 Pre-Submittal Meeting
- Digital Serialization ensures [
a,c
White paper submitted to NRC on February 7, 2025
Meetings with NMSS staff on April 17 and May 15
[
]a,c
Complies with NSTS requirements described in 10 CFR 20.2207 and maintains
[
]a,c
Approach to be further described within LAR Westinghouse Non-Proprietary Class 3 l © 2025 Westinghouse Electric Company LLC. All Rights Reserved.
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
14 14 Co-60 Timeline Cobalt-60 Pre-Submittal Meeting Westinghouse Non-Proprietary Class 3 l © 2025 Westinghouse Electric Company LLC. All Rights Reserved.
a,c
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
15 15 Questions / Discussion Cobalt-60 Pre-Submittal Meeting Westinghouse Non-Proprietary Class 3 l © 2025 Westinghouse Electric Company LLC. All Rights Reserved.
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)
Thank
- This record was final approved on 06/17/2025 18:29:13. (This statement was added by the PRIME system upon its validation)