Amendment 5 HI-STORM UMAX Spent Fuel Storage Cask Changes

Detected April 3rd, 2026

Summary

The U.S. Nuclear Regulatory Commission (NRC) has proposed Amendment 5 to the HI-STORM UMAX spent fuel storage cask system, initiating a public consultation. The amendment involves technical modifications to the storage cask design used at nuclear power facilities. Stakeholders may submit comments through Regulations.gov.

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What changed

NRC proposes Amendment 5 to the HI-STORM UMAX spent fuel storage cask system, which governs the storage and handling of spent nuclear fuel at reactor sites. The amendment involves technical modifications to the existing storage cask design specifications. This consultation (Docket No. NRC-2026-0562) seeks public input on the proposed changes.

Nuclear power facility operators, cask manufacturers, and transportation firms should review the proposed amendment and prepare substantive technical comments for submission via Regulations.gov. The public comment period is open, with the specific deadline determined by the Federal Register notice. Participation allows stakeholders to provide input on technical specifications affecting nuclear fuel management operations.

What to do next

Review proposed Amendment 5 technical specifications for HI-STORM UMAX spent fuel cask
Submit substantive technical comments via Regulations.gov (Docket No. NRC-2026-0562)
Coordinate with nuclear operations and engineering teams to assess operational impacts

Source document (simplified)

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