List of Approved Spent Fuel Storage Casks: NAC International, Inc. MAGNASTOR® Storage System, Certificate of Compliance No. 1031, Amendment Nos. 11 and 12 and Revisions to Amendment Nos. 0 Through 9

The U.S. Nuclear Regulatory Commission (NRC) is amending its spent fuel storage regulations by revising the NAC International, Inc. MAGNASTOR[supreg] Storage System listing within the "List of approved spent fuel storage casks" to include Amendment Nos. 11 and 12 and revisions to Amendment Nos. 0 through 9 to Certificate of Compliance No. 1031. Amendment No. 11 amends the certificate of compliance to add a new concrete cask, transfer cask, fuel baskets and revised contents. Amendment No. 11 also adds a definition for the concrete cask lid, revises the definition for the concrete cask to exclude the lid, adds a definition for the storage cask, and provides alternate fabrication criteria and techniques for the concrete cask lid. Amendment No. 12 and revisions to Amendment Nos. 0 through 9 add definitions for the storage cask and concrete cask lid, revise the definition of the concrete cask, and provide alternate fabrication criteria and techniques for the concrete cask lid to the certificate of compliance.