ML25234A008
| ML25234A008 | |
| Person / Time | |
|---|---|
| Issue date: | 08/22/2025 |
| From: | Holtec |
| To: | Office of Nuclear Material Safety and Safeguards |
| References | |
| Download: ML25234A008 (8) | |
Text
www.holtec.com HI-STORM FW Amd 9 Pre-submittal Meeting
www.holtec.com l Page 2 Agenda Description of HI-STORM FW UVH Version 1 Additional Changes Surveillance frequency for vent inspection increased.
New scenario considered where all vents of the HI-STORM can be closed Schedule Questions
www.holtec.com l Page 3 HI-STORM FW UVH Version 1 New version: HI-STORM FW UVH Version 1 The UVH Version 1 overpack stores the same MPC types as HI-STORM FW UVH This new version is unventilated No new transfer cask needed Only new equipment is the HI-STORM FW UVH Version 1 overpack
www.holtec.com l Page 4 HI-STORM FW UVH Version 1 Design The design of the HI-STORM FW UVH Version 1 is similar to the HI-STORM FW UVH except:
The number of ribs are variable Gap between MPC and HI-STORM shell is increased The overpack cask diameter is increased Lid thickness is now specified Further details to be shared in Proprietary Session
www.holtec.com l Page 5 HI-STORM FW - Vent Inspection The vent inspection period is increased to 30 days for the HI-STORM FW.
Similar to HI-STORM 100 Amendment 11 (USNRC Docket #72-1014)
Only for canisters whose heat loads are reduced Reduces unnecessary operator actions and associated dose for older and colder canisters
www.holtec.com l Page 6 HI-STORM FW-Vent Closure New scenario is considered where all overpack vents will be closed Similar to HI-STORM UMAX Amendment 5 (USNRC Docket #72-1032)
Only for canisters whose heat loads are reduced Decreases containments on older/colder canisters
www.holtec.com l Page 7 Schedule After this meeting, will incorporate any NRC feedback Planned submittal for November 2025 Will request a standard 2 year review period
www.holtec.com l Page 8 Thank You Krishna P. Singh Technology Campus 1 Holtec Boulevard Camden, NJ 08104 Tel: (856) 797-0900 www.holtec.com