# List of Approved Spent Fuel Storage Casks: Holtec International HI-STORM UMAX Canister Storage System, Certificate of Compliance No. 1040, Amendment No. 5
> **Nuclear Regulatory Commission** · Direct final rule. · Published 2026-04-02 · Effective 2026-06-16 · 91 FR 16541
## Document
- **Document number:** 2026-06373
- **Category:** nuclear-waste
- **Sub-agency:** Nuclear Regulatory Commission
- **Federal Register citation:** 91 FR 16541
- **CFR reference:** 10 CFR 72
- **Publication date:** 2026-04-02
- **Effective date:** 2026-06-16
- **Energy docket:** NRC-2026-0562
## Abstract

The U.S. Nuclear Regulatory Commission (NRC) is amending its spent fuel storage regulations by revising the Holtec International HI- STORM UMAX Canister Storage System listing within the "List of approved spent fuel storage casks" to include Amendment No. 5 to Certificate of Compliance No. 1040. Amendment No. 5 revises the certificate of compliance to include two new versions of the HI-STORM UMAX design (Version B1 and B2).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/04/02/2026-06373/list-of-approved-spent-fuel-storage-casks-holtec-international-hi-storm-umax-canister-storage-system)
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