Federal Register #2026-13261

NRC Proposed Amendments to MAGNASTOR Spent Fuel Storage System Certificate of Compliance

The U.S. Nuclear Regulatory Commission (NRC) is seeking public comment on proposed technical amendments to the Certificate of Compliance (CoC) for the MAGNASTOR Spent Fuel Storage System. - Government Buyer: - U.S. Nuclear Regulatory Commission (NRC) - OEM Highlight: - NAC International, Inc. is the Original Equipment Manufacturer (OEM) for the MAGNASTOR Storage System - Products/Services Requested: - Amendments to the Certificate of Compliance (CoC) No. 1031 for the MAGNASTOR Storage System - Amendment No. 16: Allows alternate methods for determining free volume inside loaded canisters and for measuring helium to ensure compliance with technical specifications - Clarifies that mixed loadings of different assembly types or subtypes within a single Transportable Storage Cask are acceptable - Amendment No. 17: Corrects an error related to M5 fuel cladding material yield strength introduced in a previous amendment - Revisions to Amendment Nos. 0 through 16 to reflect these changes - Unique/Notable Requirements: - Technical amendments affect the design basis and operational specifications for the MAGNASTOR system - Focus on compliance with safety and technical standards for spent nuclear fuel storage - Public comments are solicited on these proposed regulatory changes

Description

The U.S. Nuclear Regulatory Commission (NRC) is proposing to amend its spent fuel storage regulations by revising the NAC International, Inc. MAGNASTOR 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 No. 1031. Amendment No. 16 revises the Certificate of Compliance to permit alternate methods for determining the free volume inside a loaded canister and for measuring helium to ensure Technical Specification limits are met, and clarifies that mixed loadings of different assembly types or subtypes within a single Transportable Storage Cask are acceptable. Amendment No. 17 and revisions to Amendments 0 through 16 revise the Certificate of Compliance to incorporate changes to the design basis for the MAGNASTOR storage system to correct an error with M5 fuel cladding material yield strength introduced in Amendment No. 14 and associated revisions. Comments on the proposed rule must be received by July 31, 2026.

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