ML25350A014
| ML25350A014 | |
| Person / Time | |
|---|---|
| Issue date: | 12/16/2025 |
| From: | Holtec |
| To: | Office of Nuclear Material Safety and Safeguards |
| References | |
| Download: ML25350A014 (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 Add a new fuel classification Incorporate Topical Report on the Radiological Fuel Qualification Methodology for Dry Storage Systems 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 Add a new fuel classification to the CoC/FSAR Incorporate Topical Report on the Radiological Fuel Qualification Methodology for Dry Storage Systems These changes will be described in further detail in the closed portion of the meeting 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