NRC Proposed Amendment No. 5 to Holtec HI-STORM UMAX Canister Storage System Certificate of Compliance No. 1040
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The U.S. Nuclear Regulatory Commission (NRC) has issued a proposed rule to amend its spent nuclear fuel storage regulations under 10 CFR Part 72. Specifically, the proposal updates the listing for the Holtec International HI-STORM UMAX Canister Storage System within the NRC's approved cask list by incorporating Amendment No. 5 to Certificate of Compliance (CoC) No. 1040. Amendment No. 5 introduces two new design variants of the HI-STORM UMAX underground dry storage system: Version B1 and Version B2. These new versions expand the approved design envelope for this storage technology, which is used at nuclear power plant sites for interim dry cask storage of spent nuclear fuel awaiting permanent disposal. The HI-STORM UMAX is a below-grade, modular canister-based system designed to safely store high-burnup and standard spent fuel assemblies. Adding Versions B1 and B2 allows licensees to utilize updated design configurations that may offer enhanced capacity, shielding, or siting flexibility under the existing general license framework. As a proposed rule, this action is open for public comment before finalization. Licensees wishing to use the new versions under a general license must ensure compliance with all conditions specified in the updated CoC No. 1040, Amendment No. 5.
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Key Changes
- Amendment No. 5 to Certificate of Compliance No. 1040 is proposed for inclusion in the NRC's approved spent fuel storage cask list under 10 CFR Part 72
- Two new design versions introduced: HI-STORM UMAX Version B1 and Version B2
- Expands approved design envelope for Holtec International's underground modular canister storage system
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Obligations
What this law requires
Licensees must ensure compliance with all conditions specified in the updated Certificate of Compliance No. 1040, Amendment No. 5 when using HI-STORM UMAX Version B1 or Version B2 designs under a general license
Licensees wishing to use the new HI-STORM UMAX Version B1 or Version B2 designs must obtain approval under the general license framework, which requires adherence to the updated CoC No. 1040, Amendment No. 5
Licensees must ensure that spent fuel storage operations using Version B1 or Version B2 of HI-STORM UMAX comply with all applicable requirements in 10 CFR Part 72 as amended