Power Reactors (Division 1): Regulatory Guides 1.201 - 1.220

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 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
1.201	Guidelines for Categorizing Structures, Systems, and Components in Nuclear Power Plants According to Their Safety Significance + HISTORY - HISTORY 04/2015 – Periodic Review of Revision 1 – Reviewed with issues identified for future consideration 04/2010 – Periodic Review of Revision 1 – No issues identified 05/2003 – DG-1121, Proposed Revision 0	1	05/2006	Periodic Review - June 2025 - Reviewed with Issues Identified for Future Consideration Reviewed in 2015 – Issues identified for future consideration
1.201		0	01/2006
1.202	Standard Format and Content of Decommissioning Cost Estimates for Nuclear Power Reactors + HISTORY - HISTORY 11/2001 – DG-1085, Proposed Revision 0	0	02/2005	Periodic Review December 2022 - No Action Reviewed in 2012 – No issues identified
1.203	Transient and Accident Analysis Methods + HISTORY - HISTORY 02/2015 – Periodic Review of Revision 0 – Reviewed with issues identified for future consideration 02/2010 – Periodic Review of Revision 0 – No issues identified Revision 0 was issued with SRP Chapter 15.0.2 12/2002 – DG-1120, Second Proposed Revision 0 12/2000 – DG-1096, First Proposed Revision 0	0	12/2005	Reviewed in 2015 – Issues identified for future consideration
1.204	Guidelines for Lightning Protection of Nuclear Power Plants + HISTORY - HISTORY 04/2023 – DG-1409, Proposed Revision 1 04/2017 – Periodic Review of Revision 0 – Reviewed with issues identified for future consideration 12/2011 – Periodic Review of Revision 0 – No issues identified 02/2005 – DG-1137, Proposed Revision 0	1	01/2024
1.204		0	11/2005	Reviewed in 2017 – Issues identified for future consideration
1.205	Risk-Informed, Performance-Based Fire Protection for Existing Light-Water Nuclear Power Plants + HISTORY - HISTORY 05/2021 – RG 1.205 Revision 2 issued 11/2020 – DG-1360 Proposed Revision 2 12/2014 – Periodic Review of Revision 1 – Reviewed with issues for future consideration 03/2009 – DG-1218, Proposed Revision 1 09/2004 – DG-1139, Proposed Revision 0	2	05/2021
		1	12/2009
		0	05/2006
1.206	Applications for Nuclear Power Plants + HISTORY - HISTORY 06/2017 – DG-1325, Proposed Revision 1 03/2013 – Periodic Review of Revision 0 – No issues identified Prior to the issuance of DG-1325, RG 1.206 was entitled, "Combined License Applications for Nuclear Power Plants (LWR Edition)" 09/2006 – DG-1145, Proposed Revision 0	1	10/2018
1.206		0	06/2007
1.207	Guidelines for Evaluating Fatigue Analyses Incorporating the Life Reduction of Metal Components Due to the Effects of the Light-Water Reactor Environment for New Reactors + HISTORY - HISTORY DG-1309, Proposed Revision 1, Published 11/2014 – 03/2013 – Periodic Review of Revision 0 – No issues identified 07/2006 – DG-1144, Proposed Revision 0	1	06/2018
1.207		0	03/2007
1.208	A Performance-Based Approach to Define the Site-Specific Earthquake Ground Motion + HISTORY - HISTORY 10/2019 – Periodic Review of Revision 0 – Revise 11/2014 – Periodic Review of Revision 0 – Reviewed with issues identified for future consideration 10/2006 – DG-1146, Proposed Revision 0	0	03/2007	Reviewed in 2021 – Revise
1.209	Guidelines for Environmental Qualification of Safety-Related Computer-Based Instrumentation and Control Systems in Nuclear Power Plants + HISTORY - HISTORY 10/2006 DG-1142, Second Proposed Revision 0 09/2001 – DG-1077, "Guidelines for Environmental Qualification of Microprocessor-Based Equipment Important to Safety in Nuclear Power Plants," First Proposed Revision 0	0	03/2007	Periodic Review – November 2023 – Revise Reviewed in 2013 – Issues identified for future consideration
1.210	Qualification of Safety-Related Battery Chargers and Inverters for Nuclear Power Plants + HISTORY - HISTORY 01/2023 – DG-1412, Proposed Revision 1 07/2007 – DG-1148, Proposed revision 0	1	06/2024
1.210		0	06/2008	Reviewed in 2013 – No issues identified
1.211	Qualification of Safety-Related Cables and Field Splices for Nuclear Power Plants + HISTORY - HISTORY 07/2025 – DG-1442, proposed revision 1 05/2015 – Periodic Review of Revision 0 – No issues identified 06/2007 – DG-1132, Proposed revision 0	DG	07/2025	DG-1442
1.211		0	04/2009	Reviewed in 2015 – No issues identified
1.212	Sizing of Large Lead-Acid Storage Batteries + HISTORY - HISTORY 02/2023 – DG-1418, Proposed Revision 2 04/2015 – DG-1311, Proposed Revision 1 07/2008 – DG-1183, Proposed revision 0	2	06/2023
		1	10/2015
		0	11/2008
1.213	Qualification of Safety-Related Motor Control Centers for Nuclear Power Plants + HISTORY - HISTORY 10/2014 – Periodic Review of Revision 0 – No issues identified 06/2008 – DG-1149, Proposed revision 0	0	05/2009	Reviewed in 2014 – No issues identified
1.214	Response Strategies for Potential Aircraft Threats (OUO-SRI)	1	03/2014	Periodic Review – March 2024 – No Action
1.214		0	04/2009
1.215	"Guidance for ITAAC Closure Under 10 CFR Part 52." + HISTORY - HISTORY 12/2014 – DG-1316, Proposed Rev. 2 to RG 1.215 05/2011 – DG-1250, Proposed Rev. 1 to RG 1.215 03/2009 – DG-1204, Proposed Rev. 0	2	07/2015	Periodic Review – April 2025 - Revise
		1	05/2012
		0	10/2009
1.216	Containment Structural Integrity Evaluation for Internal Pressure Loadings Above Design-Basis Pressure + HISTORY - HISTORY 10/2015 – Periodic Review of Revision 0 – No issues identified 12/2008 – DG-1203, Proposed Revision 0	0	08/2010	Reviewed in 2015 – No issues identified
1.217	Guidance for the Assessment of Beyond-Design-Basis Aircraft Impacts + HISTORY - HISTORY 10/2016 – Periodic Review of Revision 0 – No issues identified 07/2009 – DG-1176, proposed new regulatory guide	0	08/2011	Reviewed in 2016 – No issues identified
1.218	Condition Monitoring Techniques for Electric Cables Used in Nuclear Power Plants + HISTORY - HISTORY 06/2010 – DG-1240, Proposed New Regulatory Guide	0	04/2012	Periodic Review September 2022 No Action
1.219	Guidance on Making Changes to Emergency Plans for Nuclear Power Reactors + HISTORY - HISTORY 12/2015 – DG-1324, Proposed Revision 1 05/2009 – DG-1237, proposed new regulatory guide	1	07/2016
1.219		0	12/2011
1.220	Acceptability of ASME OM-2 Code, Component Testing Requirements at Nuclear Facilities - HISTORY 06/2010 – DG-1240, Proposed New Regulatory Guide	0	06/2026	Effective date is August 18, 2026 (See FRN for details 91 FR 37152)

Page Last Reviewed/Updated Monday, June 22, 2026

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Power Reactors (Division 1): Regulatory Guides 1.201 - 1.220