# List of Approved Spent Fuel Storage Casks: NAC International NAC-UMS® Universal Storage System, Certificate of Compliance; No. 1015, Amendment No. 6
> **Nuclear Regulatory Commission** · Direct final rule. · Published 2018-10-22 · Effective 2019-01-07 · 83 FR 53159
## Document
- **Document number:** 2018-22912
- **Category:** nuclear-waste
- **Sub-agency:** Nuclear Regulatory Commission
- **Federal Register citation:** 83 FR 53159
- **CFR reference:** 10 CFR 72
- **Publication date:** 2018-10-22
- **Effective date:** 2019-01-07
- **Energy docket:** NRC-2018-0075
## Abstract

The U.S. Nuclear Regulatory Commission (NRC) is amending its spent fuel storage regulations by revising the NAC International NAC- UMS[supreg] listing within the "List of approved spent fuel storage casks" to include Amendment No. 6 to Certificate of Compliance (CoC) No. 1015. Amendment No. 6 revises the CoC's technical specifications (TSs) to: Remove a redundant requirement for inspection of the concrete cask and canister; revise a limiting condition of operation (LCO) for heat removal to clarify that "LCO not met" means that the concrete heat removal system is inoperable; remove an inspection requirement that is already covered by LCO surveillance requirements for off- normal, accident, or natural phenomenon events; and clarify that "immediate" restoration of a concrete cask's heat removal capabilities means "within the design-basis time limit" in Section 11.2.13 of the Final Safety Analysis Report (FSAR), "or within the time limit for a less than design-basis heat load case, as evaluated." Amendment No. 6 also clarifies that an LCO for loaded cask surface dose rates applies prior to storage conditions, when dose rates will be highest.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2018/10/22/2018-22912/list-of-approved-spent-fuel-storage-casks-nac-international-nac-ums-universal-storage-system)
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