Data / Federal rules / 2025-16286
Revising the Duration of Design Certifications
The Nuclear Regulatory Commission published this final rule in the Federal Register on August 26, 2025. It took effect on September 15, 2025.
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What the agency says
The U.S. Nuclear Regulatory Commission (NRC) is confirming the effective date of September 15, 2025, for the direct final rule published in the Federal Register on July 2, 2025. This direct final rule amended the NRC's regulations to revise the duration of design certifications (DCs). This action replaced the 15-year duration for DCs with a 40-year duration period, both for existing DCs currently in effect and generically for future DCs. This direct final rule did not change the date of issuance for existing DCs (i.e., the start date by which an existing DC may be referenced remains unchanged). This direct final rule also incorporated a minor editorial correction.
Key facts
- Document number
- 2025-16286
- Type
- Final rule
- Action
- Direct final rule; confirmation of effective date
- Agency
- Nuclear Regulatory Commission
- Published
- August 26, 2025
- Takes effect
- September 15, 2025
- Dates
- The effective date of September 15, 2025, for the direct final rule published July 2, 2025 (90 FR 28869), is confirmed.
- Docket
- NRC-2025-0018
- Regulation ID (RIN)
- 3150-AL26
- Code of Federal Regulations
- 10 CFR 52
- Significant
- Yes, under Executive Order 12866
- Pages
- 3
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Everything from the Nuclear Regulatory Commission · Published in August 2025
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.