# List of Approved Spent Fuel Storage Casks: NAC International, Inc., MAGNASTOR® Storage System, Certificate of Compliance No. 1031, Amendment Nos. 16 and 17 and Revisions to Amendment Nos. 0 through 16
> **Nuclear Regulatory Commission** · Direct final rule; confirmation of effective date. · Published 2026-08-12 · Effective 2026-09-14 · 91 FR 51999
## Document
- **Document number:** 2026-16398
- **Category:** nuclear-waste
- **Sub-agency:** Nuclear Regulatory Commission
- **Federal Register citation:** 91 FR 51999
- **CFR reference:** 10 CFR 72
- **Publication date:** 2026-08-12
- **Effective date:** 2026-09-14
- **Energy docket:** NRC-2026-2047
## Abstract

The U.S. Nuclear Regulatory Commission (NRC) is confirming the effective date of September 14, 2026, for the direct final rule that was published in the Federal Register on July 1, 2026. This direct final rule amended the NAC MAGNASTOR System listing within the "List of approved spent fuel storage casks" to include Amendment Nos. 16 and 17 and revisions to Amendment Nos. 0 through 16 to Certificate of Compliance No. 1031.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2026/08/12/2026-16398/list-of-approved-spent-fuel-storage-casks-nac-international-inc-magnastor-storage-system-certificate)
---
*MORVS · CC0 1.0*