Power Reactors (Division 1): Regulatory Guides 1.141 - 1.160

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
1.141	Containment Isolation Provisions for Fluid Systems HISTORY 03/2026 – Periodic Review – Revise 06/2015 – Periodic Review – Reviewed with issues identified for future consideration	1	07/2010	Periodic Review in 2026 – Revise Periodic Review in 2015 – Reviewed with issues identified for future consideration
1.141		0	04/1978
1.142	Safety-Related Concrete Structures for Nuclear Power Plants (Other than Reactor Vessels and Containments) HISTORY 04/2019 – DG-1283, Proposed Revision 3 01/2015 – Periodic Review of Revision 2 – Revise 08/2000 – DG-1098, Proposed Revision 2	3	05/2020
		2	11/2001
		1	10/1981
		0	04/1978
1.143	Design Guidance for Radioactive Waste Management Systems, Structures, and Components Installed in Light-Water-Cooled Nuclear Power Plants HISTORY 07/2020 – Periodic Review of Revision 2 – Reviewed with issues identified for future consideration 03/2018 – Periodic Review of Revision 2 – Revise 06/2015 – Periodic Review of Revision 2 – Revise 08/2000 – DG-1100, Proposed Revision 2	2	11/2001	Reviewed in 2020 – Reviewed with issues identified for future consideration
		1	10/1979
		0	07/1978
1.144	Auditing of Quality Assurance Programs for Nuclear Power Plants (Withdrawn -- See 56 FR 36175, 07/31/1991)	W	07/1991
1.144		1	09/1980
1.145	Atmospheric Dispersion Models for Potential Accident Consequence Assessments at Nuclear Power Plants HISTORY 04/2014 – Periodic Review of Revision 1 – Reviewed with issues for future consideration 02/1983 – Reissued 02/1983 to correct page 1.145-7	1	02/1983	Reviewed in 2014 – Issues identified for future consideration
1.145		0	08/1979
1.146	Qualification of Quality Assurance Program Audit Personnel for Nuclear Power Plants (Withdrawn -- See 56 FR 36175, 07/31/1991)	W	07/1991
1.146		0	08/1980
1.147	Inservice Inspection Code Case Acceptability, ASME Section XI, Division 1 HISTORY 01/2023 – DG-1406, Proposed Revision 21 01/2021 – DG-1367, Proposed Revision 20 08/2018 – DG-1342, Proposed Revision 19 03/2016 – DG-1296, Proposed Revision 18 06/2013 – DG-1231, Proposed Revision 17 04/2009 – DG-1192, Proposed Revision 16 12/2004 – DG-1134, Proposed Revision 15 08/2004 – DG-1125, Proposed Revision 14 12/2001 – DG-1091, Proposed Revision 13 05/1997 – DG-1050, Proposed Revision 12 08/1979 – Draft SC 721-4, Proposed Revision 0	DG	02/2026	DG-1447 issued: Federal Register Notice
		21	03/2024	07/2024: Final Rule Federal Register Notice
		20	12/2021	03/2022: Final Rule Federal Register Notice
		19	10/2019	03/2020: Final Rule Federal Register Notice
		18	03/2017	01/2018: Final Rule Federal Register Notice
		17	08/2014
		16	10/2010
		15	10/2007
		14	08/2005
		13-R	01/2004
		13	06/2003
		12	05/1999
		11	10/1994
		10	07/1993
		9	04/1992
		8	11/1990
		7	07/1989
		6	05/1988
		5	08/1986
		4	09/1985
		3	07/1984
		2	06/1983
		1	02/1982
		0	02/1981
1.148	Functional Specification for Active Valve Assemblies in Systems Important to Safety in Nuclear Power Plants (Withdrawn -- See 75 FR 2894, 01/19/2010) HISTORY 02/1979 – Draft SC 704-5, Proposed Revision 0	W	01/2010
1.148		0	03/1981
1.149	Nuclear Power Plant Simulation Facilities for Use in Operator Training, License Examinations, and Applicant Experience Requirements HISTORY 07/2016 – Periodic Review of Revision 4 – Reviewed with no issues identified 05/2012 – DG-1248, Proposed Revision 4 Prior to the issuance of DG-1248, RG 1.149 was entitled, "Nuclear Power Plant Simulation Facilities for Use in Operator Training and License Examinations" 08/1999 – DG-1080, Proposed Revision 3 06/1995 – DG-1043, Proposed Revision 2 11/1984 – Draft OL 402-5, Proposed Revision 1 07/1980 – Draft RS 110-5, Proposed Revision 0	DG	04/2026	DG-1384 issued for public comment
		4	04/2011	Reviewed in 2016 – No issues identified
		3	10/2001
		2	04/1996
		1	04/1987
		0	04/1981
1.150	Ultrasonic Testing of Reactor Vessel Welds During Preservice and Inservice Examinations (Withdrawn-- See 73 FR 7766, 02/11/2008)	W	02/2008
		1	02/1983
		0	06/1981
1.151	Instrument Sensing Lines HISTORY 01/2019 – DG-1352, Proposed Revision 2 09/2016 – Periodic Review of Revision 1 – Revise 12/2008 – DG-1178, Proposed Revision 1 Draft IC 126-5, Proposed Revision 0, published 03/1982	2	02/2020
		1	07/2010
		0	07/1983
1.152	Criteria for Programmable Digital Devices in Safety-Related Systems of Nuclear Power Plants HISTORY 02/2023 – DG-1374, Proposed Revision 4 Prior to issuance of DG-1374, RG 1.152 was entitled, “Criteria for Use of Computers in Safety-Systems of Nuclear Power Plants” 06/2010 – DG-1249, Proposed Revision 3 – Revise 12/2004 – DG-1130, Proposed Revision 2 – Revise 05/1995 – DG-1039, Proposed Revision 1 03/1983 – DG-1130, Proposed Revision 2 – Revise	4	07/2023
		3	07/2011	Periodic Review 05/2019 – Revise Periodic Review 06/2016 - Revise
		2	01/2006
		1	01/1996
		0	11/1985
1.153	Criteria for Safety Systems (12/85) HISTORY 12/2025 – DG-1251, Revision 1, Proposed Rev 2 of RG 1.153 04/2017 – Periodic Review of Revision 1 08/2015 – DG- 1251, Revision 0, Proposed Rev 2 of RG 1.153 11/1995 – DG-1042, Proposed Revision 1 12/1982 – Draft IC 609-5, Proposed Revision 0	DG	12/2025
		1	06/1996	Reviewed in 2017 – Issues identified for future consideration
		0	12/1985
1.154	Format and Content of Plant-Specific Pressurized Thermal Shock Safety Analysis Reports for Pressurized Water Reactors (Withdrawn -- See 76 FR 2726, 01/14/2011) HISTORY 01/1986 – Draft SI 502-4, Proposed Revision 0	W	01/2011
1.154		0	01/1987
1.155	Station Blackout HISTORY 06/2026 – Periodic Review – Reviewed with no issues identified 09/2015 – Periodic Review – Reviewed with issues identified for future consideration 08/1988 – RG 1.155 Revision 0reissued August 1988 with corrected tables 06/1988 – RG 1.155 Revision 0 issued 03/1986 – Draft SI 501-4, Proposed Revision 0	0	08/1988	Periodic Review in 2026 – Reviewed with no issues identified Reviewed in 2015 – Issues identified for future consideration
1.156	Qualification of Connection Assemblies for Nuclear Power Plants HISTORY 04/2022 – DG-1400, Proposed Revision 2 01/2011 – DG-1254, Proposed Revision 1 05/1987 – Draft EE 404-4, Proposed Revision 0	2	02/2023
		1	07/2011	Reviewed in 2017 – No issues identified
		0	11/1987
1.157	Best-Estimate Calculations of Emergency Core Cooling System Performance HISTORY 04/2026 – Periodic Review – Reviewed with no issues identified 04/2013 – Periodic Review – Reviewed with issues identified for future consideration 03/1987 – Draft RS 701-4, Proposed Revision 0	0	05/1989	Periodic Review in 2026 – Reviewed with no issues identified Periodic Review in 2013 – Reviewed with issues identified for future consideration
1.158	Qualification of Safety-Related Lead Storage Batteries for Nuclear Power Plants HISTORY 02/2025 – Periodic Review of Revision 2 – Revise 05/2017 – DG-1338, Proposed Revision 1 09/2016 – Periodic Review of Revision 0 – Revise 08/2011 – Periodic Review of Revision 0 – No issues identified 08/1987 – Draft EE 006-5, Proposed Revision 0	1	03/2018	Reviewed in 2025 – Revise
1.158		0	02/1989
1.159	Assuring the Availability of Funds for Decommissioning Nuclear Reactors HISTORY 02/2022 – DG-1348 Revision 1, Proposed Revision 3 06/2018 – DG-1348, Proposed Revision 3 11/2016 – Periodic Review of Revision 2 – Reviewed with no issues identified 01/2011 – DG-1229, Proposed Revision 2 05/2001 – DG-1106, Proposed Revision 1 05/1989 – DG-1003, Proposed Revision 0	DG	07/2026	DG-1467
		2	10/2011	Reviewed in 2016 – No issues identified
		1	10/2003
		0	08/1990
1.160	Monitoring the Effectiveness of Maintenance at Nuclear Power Plants HISTORY 06/2018 – DG-1336, Proposed Revision 4 09/2011 – DG-1278, Proposed Revision 3 08/1996 – DG-1051, Proposed Revision 2 06/1994 – DG-1031, Proposed Revision 1 11/1992 – DG-1020, Proposed Revision 0	4	09/2018
		3	05/2012
		2	03/1997
		1	01/1995
		0	06/1993

Page Last Reviewed/Updated Tuesday, August 11, 2026

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Power Reactors (Division 1): Regulatory Guides 1.141 - 1.160