Data / Federal rules / 2026-13261
List of Approved Spent Fuel Storage Casks: NAC International, Inc., MAGNASTOR® Storage System, Certificate of Compliance No. 1031, Amendment Nos. 16 and 17 and Revisions to Amendment Nos. 0 Through 16
The Nuclear Regulatory Commission published this proposed rule in the Federal Register on July 1, 2026. Comments closed on July 31, 2026.
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What the agency says
The U.S. Nuclear Regulatory Commission (NRC) is proposing to amend its spent fuel storage regulations by revising the NAC International, Inc. (NAC) MAGNASTOR[supreg] System listing within the "List of approved spent fuel storage casks" to include Amendment Nos. 16 and 17 and revisions to Amendment Nos. 0 through 16 to Certificate of Compliance (CoC) No. 1031. Amendment No. 16 revises the CoC to permit alternate methods for determining the free volume inside a loaded canister and for measuring helium to ensure that Technical Specification limits are met. It also clarifies that mixed loadings of different assembly types or subtypes within a single Transportable Storage Cask are acceptable. Amendment No. 17 and revisions to Amendment Nos. 0 through 16 revise the CoC to incorporate changes to the design basis for the MAGNASTOR[supreg] storage system to correct an error with M5 fuel cladding material yield strength that was introduced in CoC No. 1031, Amendment No. 14 and the associated revisions to Amendment Nos. 0 through 13.
Key facts
- Document number
- 2026-13261
- Type
- Proposed rule
- Action
- Proposed rule
- Agency
- Nuclear Regulatory Commission
- Published
- July 1, 2026
- Comments due
- July 31, 2026
- Dates
- Submit comments by July 31, 2026. Comments received after this date will be considered if it is practical to do so, but the NRC is able to ensure consideration of only comments received on or before this date.
- Docket
- NRC-2026-2047
- Regulation ID (RIN)
- 3150-AL68
- Code of Federal Regulations
- 10 CFR 72
- Pages
- 4
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Everything from the Nuclear Regulatory Commission · Published in July 2026
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.