Nuclear Regulatory Commission Docket NRC-2020-0166 Proposed Rule

2020-20667: List of Approved Spent Fuel Storage Casks: NAC International, Inc. MAGNASTOR® Storage System, Certificate of Compliance No. 1031, Amendment No. 9

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Summary

The U.S. Nuclear Regulatory Commission (NRC) is proposing to amend its regulations by revising the NAC International, Inc. MAGNASTOR[supreg] Storage System listing within the "List of approved spent fuel storage casks" to include Amendment No. 9 to Certificate of Compliance No. 1031. Amendment No. 9 revises the certificate of compliance to add a new concrete storage overpack; four new heat load zone patterns and their associated decay heats that are specific to Babcock and Wilcox 15x15 fuel assemblies; a new Babcock & Wilcox 15x15 hybrid fuel assembly type (BW15H5); and a new maximum enrichment for the BW15H2 hybrid fuel assembly, including a new minimum soluble boron concentration during loading and unloading operations and neutron absorber areal density. In addition, Amendment No. 9 makes non- technical changes to reorganize Appendix B of the technical specifications.

The agency’s own summary, as published.

What this changes

Amends 1 part of the Code of Federal Regulations — the standing rules this notice rewrites.

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