# 2026-01647: Approved: Hotter Nuclear Fuel Storage Casks with Fixed Safety Details 2026-01647, List of Approved Spent Fuel Storage Casks: TN Americas LLC, NUHOMS® EOS Dry Spent Fuel Storage System, Certificate of Compliance No. 1042, Amendment No. 5, is a Federal Register rule from Nuclear Regulatory Commission published 2026-01-28, effective 2026-04-13 (as of 2026-06-11). - Canonical: https://policyrisk.com/federal-register/2026-01647 - As of: 2026-06-11 - Plain-text twin of the page above; the HTML and this file carry the same facts. ## Facts - Document number: 2026-01647 - Title: List of Approved Spent Fuel Storage Casks: TN Americas LLC, NUHOMS® EOS Dry Spent Fuel Storage System, Certificate of Compliance No. 1042, Amendment No. 5 - Type: Rule - Agencies: Nuclear Regulatory Commission - Citation: 91 FR 3635 - Published: 2026-01-28 - Effective: 2026-04-13 - Comments close: not stated - Significant: no - Touches household money: no - Regulation identifier numbers: 3150-AL55 - Last updated: 2026-06-11 ## In one line Approved: Hotter Nuclear Fuel Storage Casks with Fixed Safety Details ## Summary The Nuclear Regulatory Commission updated the rules for storing spent nuclear fuel using TN Americas’ NUHOMS EOS system. The new changes let the system handle hotter fuel canisters safely, fix some small surface flaws rules, and clean up the paperwork for easier reading. These updates kick in on April 13, 2026, and mainly affect nuclear plant operators using this storage system, with no big cost changes expected. ## Abstract The U.S. Nuclear Regulatory Commission (NRC) is amending its spent fuel storage regulations by revising the TN Americas LLC, NUHOMS[supreg] Extended Optimized Storage (EOS) Dry Spent Fuel Storage System listing within the "List of approved spent fuel storage casks" to include Amendment No. 5 to Certificate of Compliance (CoC) No. 1042. Amendment No. 5 revises the CoC to add a new heat load zone configuration (HLZC) for the EOS-37PTH canister, increasing the maximum heat load to 54 kW per dry shielded canister (DSC) for storage in the EOS-Horizontal Storage Module (HSM) and transfer using EOS-Transfer Casks (TC)125/135; clarifies acceptance criteria for minor surface imperfections on high strength low-alloy (HSLA) basket plates in the Updated Final Safety Analysis Report (UFSAR); and makes editorial updates to the UFSAR and Technical Specification (TS) revisions to align with Amendment No. 4, improve readability, and correct code references. ## Effects PRIA read - Allows hotter fuel in EOS-37PTH cans: benefit, low. Power reactor licensees using the NUHOMS EOS-37PTH can now store canisters with a maximum heat load of 54 kW per dry shielded canister (DSC) in the EOS-Horizontal Storage Module and transfer them using EOS-TC125/135. This change is part of Amendment No. 5 to Certificate of Compliance No. 1042 and b… - Clarifies minor surface imperfection rules: benefit, low. The amendment clarifies acceptance criteria for minor surface imperfections on high strength low-alloy (HSLA) basket plates in the Updated Final Safety Analysis Report. This clarification applies to the NUHOMS EOS design changes described in Amendment No. 5. - Applies only to new casks; no retrofit mandate: benefit, low. Amendment No. 5 applies only to new casks fabricated and used under Amendment No. 5; existing users of the NUHOMS EOS system are not required to adopt the changes and may comply voluntarily. The amendment becomes effective April 13, 2026. - Approval avoids exemption costs: benefit, medium. If Amendment No. 5 were not approved, 10 CFR part 72 general licensees seeking to load spent fuel under the changes would have to request exemptions from Sec. 72.212 and 72.214, increasing administrative burden and costs to each licensee. Approval allows licensees to use the modified cask design un… - No significant environmental or radiation impact: benefit, low. The NRC found Amendment No. 5 will not cause any significant increase in effluents, individual or cumulative radiation exposures, or the potential for radiological accidents, and that any occupational or offsite doses would remain within 10 CFR part 20 limits. The NRC made a Finding of No Significa… ## Related documents - [2026-19568](https://policyrisk.com/federal-register/2026-19568): Regulatory Enhancements for Reactor Licensing, Decommissioning, and Operational Oversight, 2026-09-24 - [2026-14341](https://policyrisk.com/federal-register/2026-14341): Modernizing Reactor Licensing, Safety Oversight, and Siting Practices, 2026-07-16 - [2026-13687](https://policyrisk.com/federal-register/2026-13687): Implementation of the National Environmental Policy Act, 2026-07-07 - [2026-12067](https://policyrisk.com/federal-register/2026-12067): Fee Schedules; Fee Recovery for Fiscal Year 2026, 2026-06-16 - [2026-08550](https://policyrisk.com/federal-register/2026-08550): Licensing Requirements for Microreactors and Other Reactors With Comparable Risk Profiles, 2026-05-01 - [2026-08015](https://policyrisk.com/federal-register/2026-08015): Generic Environmental Impact Statement for Licensing of New Nuclear Reactors, 2026-04-24 ## Sources - [2026-01647 on federalregister.gov](https://www.federalregister.gov/documents/2026/01/28/2026-01647/list-of-approved-spent-fuel-storage-casks-tn-americas-llc-nuhoms-eos-dry-spent-fuel-storage-system) - [2026-01647 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-01-28/pdf/2026-01647.pdf) ## Related - [Previous: 2026-01642, Special Conditions: Safran Electric & Power S.A. ENGINeTM US100 Series Electric…](https://policyrisk.com/federal-register/2026-01642) - [Next: 2026-01648, Horse Protection Amendments; Further Postponement of Regulations](https://policyrisk.com/federal-register/2026-01648) - [All Federal Register documents](https://policyrisk.com/federal-register) Source: PRIA, https://policyrisk.com/federal-register/2026-01647 (as of 2026-06-11).