List of Approved Spent Fuel Storage Casks: NAC International, Inc., NAC-UMS® Universal Storage System, Certificate of Compliance No. 1015, Amendment No. 10, and Revision 1 to Amendment Nos. 5 Through 9
Published Date: 1/30/2026
Rule
Summary
The Nuclear Regulatory Commission is confirming that changes to the NAC-UMS® spent fuel storage system will take effect on February 23, 2026. These updates fix some licensing issues and update the company’s address, helping keep nuclear waste stored safely and smoothly. This affects companies using these storage casks but won’t cause extra costs or delays.
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
Amendment Effective Date Confirmed
If your company uses the NAC-UMS spent fuel storage system (Certificate of Compliance No. 1015, Amendment No. 10, and Revision 1 to Amendment Nos. 5 through 9), the rule amending that certificate becomes effective on February 23, 2026. The direct final rule was published December 8, 2025 (90 FR 56657) and the NRC confirmed the February 23, 2026 effective date.
Licensing Fixes and Address Update
The amendment corrects licensing-basis deficiencies in the NAC-UMS spent fuel storage system and updates the applicant's headquarters address in the Certificate of Compliance. The NRC states these updates help keep spent fuel stored safely and smoothly and will not cause extra costs or delays.
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