# List of Approved Spent Fuel Storage Casks: TN Americas LLC Standardized Advanced NUHOMS® System, Certificate of Compliance No. 1029, Amendment No. 4
> **Nuclear Regulatory Commission** · Direct final rule. · Published 2018-12-27 · Effective 2019-03-12 · 83 FR 66585
## Document
- **Document number:** 2018-27949
- **Category:** nuclear-waste
- **Sub-agency:** Nuclear Regulatory Commission
- **Federal Register citation:** 83 FR 66585
- **CFR reference:** 10 CFR 72
- **Publication date:** 2018-12-27
- **Effective date:** 2019-03-12
- **Energy docket:** NRC-2018-0265
## Abstract

The U.S. Nuclear Regulatory Commission (NRC) is amending its spent fuel storage regulations by revising the TN Americas LLC Standardized Advanced NUHOMS[supreg] Horizontal Modular Storage System (NUHOMS[supreg] System) listing within the "List of approved spent fuel storage casks" to include Amendment No. 4 to Certificate of Compliance No. 1029. Amendment No. 4 revises the certificate of compliance's technical specifications to: clarify the applicability of unloading procedures and training modules relative to spent fuel pool availability; credit the use of the installed temperature monitoring system specified in lieu of performing daily visual vent inspections; establish dose rates on the front inlet bird screen and the door of the concrete storage module for the Advanced Horizontal Storage Module; modify the criteria for performing Advanced Horizontal Storage Module air vent visual inspections; identify the blocked vent time limitations for each of the 24PT1 and 24PT4 dry shielded canisters; and provide a new temperature rise value for the Advanced Horizontal Storage Module with a loaded 24PT4 dry shielded canister.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/12/27/2018-27949/list-of-approved-spent-fuel-storage-casks-tn-americas-llc-standardized-advanced-nuhoms-system)
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