List of Approved Spent Fuel Storage Casks: HI-STORM 100, Certificate of Compliance No. 1014, Renewed Amendment No. 19

Document 2025-07360 is a Final Rule published by the Nuclear Regulatory Commission in the Federal Register on April 30, 2025, with an effective date of May 27, 2025. The U.S. Nuclear Regulatory Commission (NRC) is confirming the effective date of May 27, 2025, for the direct final rule that was published in the Federal Register on March 13, 2025. This direct final rule amended the Holtec International HI-STORM 100 Cask System listing within the "List of approved spent fuel storage casks" to include Renewed Amendment No. 19 to Certificate of Compliance No. 1014. Renewed Amendment No. 19 revises the certificate of compliance to update the acceptance criteria and method of evaluation (MOE) for the HI-STORM 100 system tipover accident for equipment combinations involving multi- purpose canisters with Metamic-HT baskets. This involves applying a new stress-based criteria and completing new evaluations consistent with the new tipover acceptance criteria and MOE and involves some adjustments of the existing deflection criteria. View the original at https://www.federalregister.gov/documents/2025/04/30/2025-07360/list-of-approved-spent-fuel-storage-casks-hi-storm-100-certificate-of-compliance-no-1014-renewed.

No. Document 2025-07360 is not classified as economically significant under Executive Order 12866. Economically significant rules require OIRA review and are estimated to have impacts of $100 million or more per year.