2026-22421·NUCLEAR REGULATORY COMMISSION

List of Approved Spent Fuel Storage Casks: TN Americas, LLC: Standardized NUHOMS® Horizontal Modular Storage System for Irradiated Nuclear Fuel, Certificate of Compliance No. 1004, Renewed Amendment No. 19

Final RuleFinal Rule

Published: Nov 3, 2026
Effective: Nov 9, 2026
Citation: 91 FR 69205
Docket: NRC-2026-2806

Direct final rule; confirmation of effective date.

Summary

The Nuclear Regulatory Commission (NRC) has finalized a rule that updates the official list of approved containers for storing spent nuclear fuel. The change adds Amendment 19 to the certification for TN Americas, LLC’s Standardized NUHOMS® Horizontal Modular Storage System. The amendment introduces a new “61BTH” basket design that uses staggered plates—similar to designs already approved for other storage systems—to make the baskets easier to build, lighter, and more reliable. The update also corrects editorial errors and clarifies terminology in the certification documents. The rule is issued by the NRC, the federal agency that oversees nuclear safety. It primarily affects the company that manufactures and operates the NUHOMS® storage system—TN Americas, LLC—as well as any nuclear power plants or other facilities that use this system to hold irradiated fuel on site. By approving the new basket design, the NRC allows these facilities to replace older baskets with the improved version, potentially lowering costs and enhancing safety. The rule was originally published on August 26, 2026, and the NRC confirmed that it will become effective on November 9, 2026. No additional public comment period is being opened because the rule is being applied as a direct final action. After the effective date, TN Americas, LLC can begin using the revised 61BTH basket in its NUHOMS® storage modules, and any related licensing or construction plans can proceed under the updated certification.

AI-generated summary — verify against the Federal Register text.

Official abstract

The U.S. Nuclear Regulatory Commission (NRC) is confirming the effective date of November 9, 2026, for the direct final rule that was published in the Federal Register on August 26, 2026. This direct final rule amended the TN Americas, LLC Standardized NUHOMS[supreg] Horizontal Modular Storage System for Irradiated Nuclear Fuel listing within the "List of approved spent fuel storage casks" to include Amendment No. 19 to Certificate of Compliance No. 1004. Amendment No. 19 revises the certificate of compliance to provide for a 61BTH improved basket design using staggered plates similar the 24PTH Type 3 basket approved in CoC 1004 Amendment 18 and similar to the EOS 37PTH and 89BTH baskets approved in CoC 1042. This will simplify construction, reduce weight and improve fabricability. Additional changes are proposed to address editorial corrections, consistency, and terminology clarifications.