Spotlight
Power Reactors (Division 1): Regulatory Guides 1.221 - 1.240
This page lists the number, title, publication date, and revisions for each regulatory guide in Division 1, "Power Reactors," with references to draft guides and related documents (where applicable).
See also Draft Regulatory Guides for Public Comment.
See NRC Regulatory Guides for more general information.
Regulatory Guides are reviewed about every 10 years, although a guide may be reviewed more frequently if the staff believes an emerging issue affects the guide. The NRC began these reviews in 2010, and began posting the results of its reviews on this site in 2013. The review dates are hyperlinked to the review memorandum, which provide useful information about the status and any known issues with the associated regulatory guide.
| Guide Number | Title | Revision Number | Issue Date | Additional Information |
|---|---|---|---|---|
| 1.221 | Design-Basis Hurricane and Hurricane Missiles for Nuclear Power Plants HISTORY
| 0 | 10/2011 | Periodic Review in 2016 – Reviewed with no issues identified |
| 1.222 | Conducting Periodic Testing for Breakaway Oxidation Behavior HISTORY
| DG | 07/2026 | DG-1261 Issued |
| DG | 10 CFR 50.46c Rulemaking SECY 16-0033 | |||
| 1.223 | Testing for Postquench Ductility HISTORY
| DG | 07/2026 | DG-1262 |
| DG | 10 CFR 50.46c Rulemaking SECY 16-0033 | |||
| 1.224 | Establishing Analytical for Zirconium Based Alloy Cladding HISTORY
| DG | 07/2026 | DG-1263 |
| DG | 10 CFR 50.46c Rulemaking SECY 16-0033 | |||
| 1.225 | An Approach for a Risk-Informed Evaluation Process Supporting Alternative Acceptance Criteria | DG | 07/2026 | DG-1426 |
| 1.226 | Flexible Mitigation Strategies for Beyond-Design-Basis Events HISTORY
| 0 | 06/2019 | |
| 1.227 | Wide-Range Spent Fuel Pool Level Instrumentation HISTORY
| 0 | 06/2019 | |
| 1.228 | Integrated Response Capabilities for Beyond-Design Basis Events HISTORY
| DG | 08/2019 - Final Rule Federal Register Notice | |
| 1.229 | Alternative Risk-Informed Approach for Addressing the Effects of Debris on Post Accident Long-Term Core Cooling HISTORY
| DG | 10 CFR 50.46c Rulemaking SECY 16-0033 | |
| 1.230 | Regulatory Guidance on the Alternate Pressurized Thermal Shock Rule HISTORY
| 0 | 09/2018 | |
| 1.231 | Acceptance of Commercial-Grade Design and Analysis Computer Programs Used in Safety-Related Applications for Nuclear Power Plants HISTORY
| 0 | 12/2016 | |
| 1.232 | Developing Principal Design Criteria for Non-Light Water Reactors HISTORY
| 0 | 04/2018 | |
| 1.233 | Guidance for a Technology-Inclusive, Risk-Informed, and Performance-Based Methodology to Inform the Licensing Basis and Content of Applications for Licenses, Certifications, and Approvals for Non-Light Water Reactors HISTORY
| 0 | 06/2020 | |
| 1.234 | Evaluating Deviations and Reporting Defects and Noncompliance Under 10 CFR Part 21 HISTORY
| 1 | 03/2024 | |
| 0 | 04/2018 | |||
| 1.235 | Emergency Planning for Decommissioning Power Reactors | DG | 02/2022 | DG-1346 , Rev 1, Proposed Revision 0 for RG 1.235 |
| 1.236 | Pressurized-Water Reactor Control Rod Ejection and Boiling-Water Reactor Control Rod Drop Accidents HISTORY
| 0 | 06/2020 | |
| 1.237 | Guidance for Changes During Construction for New Nuclear Power Plants Being Constructed Under a Combined License Referencing a Certified Design Under 10 CFR Part 52 HISTORY
| DG | 07/2026 | DG-1461 |
| 0 | 02/2021 | |||
| 1.238 | Criteria for The Protection of Safety-Related (Class 1E) Power Systems and Equipment for Nuclear Power Plants HISTORY
| 0 | 01/2025 | |
| 1.239 | Licensee Actions to Address Nonconservative Technical Specifications HISTORY
| 0 | 11/2020 | |
| 1.240 | Fresh and Spent Fuel Pool Criticality Analysis HISTORY
| 0 | 03/2021 |
Page Last Reviewed/Updated Tuesday, August 11, 2026
Page Last Reviewed/Updated Tuesday, August 11, 2026