# List of Approved Spent Fuel Storage Casks: NAC International NAC-UMS® Universal Storage System, Certificate of Compliance No. 1015, Amendment No. 7
> **Nuclear Regulatory Commission** · Direct final rule. · Published 2019-05-15 · Effective 2019-07-29 · 84 FR 21687
## Document
- **Document number:** 2019-10017
- **Category:** nuclear-waste
- **Sub-agency:** Nuclear Regulatory Commission
- **Federal Register citation:** 84 FR 21687
- **CFR reference:** 10 CFR 72
- **Publication date:** 2019-05-15
- **Effective date:** 2019-07-29
- **Energy docket:** NRC-2019-0070
## Abstract

The U.S. Nuclear Regulatory Commission (NRC) is amending its spent fuel storage regulations by revising the NAC International NAC- UMS[supreg] Universal Storage System listing within the "List of approved spent fuel storage casks" to include Amendment No. 7 to Certificate of Compliance No. 1015. Amendment No. 7 revises the surveillance requirements for technical specifications A3.1.6.1 and A3.1.6.2 to ensure that adequate monitoring of the concrete cask heat removal system is performed. Amendment No. 7 also revises the basis for technical specification A3.1.6 to clarify that the surveillance requirements for technical specification A3.1.6 require a minimum of two outlet air temperature measurements to provide an average outlet temperature.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2019/05/15/2019-10017/list-of-approved-spent-fuel-storage-casks-nac-international-nac-ums-universal-storage-system)
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