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

What it does

• •Confirms the effective date of September 14, 2026, for a direct final rule amending the approved spent fuel storage casks list
• •Adds Amendment Nos. 16 and 17 and revisions to Amendment Nos. 0 through 16 to the NAC International MAGNASTOR Storage System Certificate of Compliance No. 1031
• •Updates technical specifications and safety evaluation reports associated with the MAGNASTOR cask system

Why it matters

• •The rule allows the MAGNASTOR spent fuel storage system to operate under updated regulatory specifications following NRC safety review
• •The NRC received no adverse comments on the proposed amendments, confirming the regulatory changes proceed as scheduled

Who is affected

• •NAC International, Inc., the manufacturer and certificate holder for the MAGNASTOR Storage System
• •Nuclear facilities and licensees that use or plan to use the MAGNASTOR cask for storing spent nuclear fuel

What happens next

The rule becomes effective on September 14, 2026, as scheduled; the amended certificate and technical specifications are available in the NRC's ADAMS database under Package Accession No. ML26202A387.