Nuclear Cask Upgrades Proposed: Public Comments Welcome on Holtec Designs
Published Date: 4/2/2026
Proposed Rule
Summary
The Nuclear Regulatory Commission is updating the approved list for Holtec’s HI-STORM UMAX spent fuel storage system by adding two new design versions, B1 and B2. This change affects nuclear plants using these storage casks and opens a comment period until May 4, 2026. No immediate costs are expected, but the update helps keep nuclear waste storage safe and up to date.
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