# Federal Register 2026-21801 — effective 2026-11-25 — NRC Reviews of Reactor Designs Previously Authorized by U.S. Department of Energy or Department of War — Nuclear Regulatory Commission

For Federal Register 2026-21801, effective date is 2026-11-25; agency is Nuclear Regulatory Commission; published is 2026-10-26; cfr parts amended is 10 CFR 50, 10 CFR 53; dates, as printed is This final rule is effective on November 25, 2026, recorded from its source on 2026-10-26; source re-checked 2026-11-03.

- **FR document number:** 2026-21801 _(verified: appears in the quote below)_
- **Rule:** NRC Reviews of Reactor Designs Previously Authorized by U.S. Department of Energy or Department of War _(verified: appears in the quote below)_
- **Agency:** Nuclear Regulatory Commission _(verified: appears in the quote below)_
- **Effective date:** 2026-11-25 _(verified: appears in the quote below)_
- **DATES, as printed:** This final rule is effective on November 25, 2026. _(verified: appears in the quote below)_
- **CFR parts amended:** 10 CFR 50, 10 CFR 53 _(our reading, not quoted from the source)_
- **Published:** 2026-10-26 _(verified: appears in the quote below)_

## What the source says

> {"document_number":"2026-21801","title":"NRC Reviews of Reactor Designs Previously Authorized by U.S. Department of Energy or Department of War","agency_names":["Nuclear Regulatory Commission"],"effective_on":"2026-11-25","dates":"This final rule is effective on November 25, 2026.","cfr_references":[{"chapter":null,"citation_url":null,"part":"50","title":10},{"chapter":null,"citation_url":null,"part":"53","title":10}],"publication_date":"2026-10-26","html_url":"https://www.federalregister.gov/documents/2026/10/26/2026-21801/nrc-reviews-of-reactor-designs-previously-authorized-by-us-department-of-energy-or-department-of-war"}

## Source

- https://www.federalregister.gov/api/v1/documents.json?per_page=1000&order=oldest&conditions%5Btype%5D%5B%5D=RULE&conditions%5Beffective_date%5D%5Bgte%5D=2026-08-31&conditions%5Beffective_date%5D%5Blte%5D=2026-12-31&fields%5B%5D=document_number&fields%5B%5D=title&fields%5B%5D=agency_names&fields%5B%5D=effective_on&fields%5B%5D=dates&fields%5B%5D=cfr_references&fields%5B%5D=publication_date&fields%5B%5D=html_url

Last verified: 2026-11-03. Review by: 2026-11-16.
Part of [Federal rules taking effect: every US final rule in the Federal Register, by effective date](https://referencesource.org/federal-rules-taking-effect/).