ML25350C318
| ML25350C318 | |
| Person / Time | |
|---|---|
| Issue date: | 12/16/2025 |
| From: | Holtec |
| To: | Office of Nuclear Material Safety and Safeguards |
| References | |
| Download: ML25350C318 (0) | |
Text
www.holtec.com HI-STORM UMAX Amd 6 Pre-submittal Meeting
www.holtec.com l Page 2 Agenda Description of HI-STORM UMAX Version F Description of HI-TRAC VW MSC Additional Changes:
Incorporate MPC-37 and MPC-89CBS across all variants of the HI-STORM UMAX Incorporate Thermal Topical Report for Allowance of New Heat Load Patterns New Fuel Classification Remove Heat Load Penalty Schedule Questions
www.holtec.com l Page 3 HI-STORM UMAX Version F New version: HI-STORM UMAX Version F The Version F overpack stores the same MPC types as HI-STORM UMAX VVM Incorporate MPC-37CBS and MPC-89 CBS (across all HI-STORM UMAX variants)
New transfer cask is also introduced
www.holtec.com l Page 4 HI-STORM UMAX Version F Design The design of the HI-STORM UMAX Version F is similar to the HI-STORM UMAX except:
No divider shell New vent design
www.holtec.com l Page 5 HI-TRAC VW MSC New Version: HI-TRAC VW MSC The MSC transfer cask moves the same MPC types as HI-TRAC VW This version has no water jacket
www.holtec.com l Page 6 HI-TRAC VW MSC Design The design of the HI-TRAC VW MSC is similar to the HI-TRAC VW except:
No water jacket Higher weight Lead and Holtite in the shell
www.holtec.com l Page 7 Additional changes:
Incorporate MPC-37CBS and MPC-89CBS across all variants of the HI-STORM UMAX Incorporate Thermal Topical Report for Allowance of New Heat Load Patterns These changes will be described in further detail in the closed portion of the meeting Add a new fuel classification to the CoC/FSAR Remove heat load penalty Holtec will provide benchmarking data to showcase the safety of the HI-STORM UMAX overpack
www.holtec.com l Page 8 Schedule After this meeting, will incorporate any NRC feedback Planned submittal for December 2025 Will request a standard 2 year review period
www.holtec.com l Page 9 Thank You Krishna P. Singh Technology Campus 1 Holtec Boulevard Camden, NJ 08104 Tel: (856) 797-0900 www.holtec.com