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Power Reactors (Division 1): Regulatory Guides 1.81 - 1.100

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
1.81 Shared Emergency and Shutdown Electric Systems for Multi-Unit Nuclear Power Plants 1 01/1975 Reviewed in 2019 – No issues identified
0 06/1974  
1.82 Water Sources for Long-Term Recirculation Cooling Following a Loss-of-Coolant Accident 5 08/2022  
4 03/2012 01/2015 – PR – Revise
3 11/2003  
2 05/1996  
1 11/1985  
0 06/1974  
1.83 Inservice Inspection of Pressurized Water Reactor Steam Generator Tubes
(Withdrawn -- See 74 FR 58324, 11/12/2009)		 W 11/2009  
1 07/1975  
0 07/1974  
1.84 Design, Fabrication, and Materials Code Case Acceptability, ASME Section III 40 03/2024  
39 12/2021 03/2022: Final Rule Federal Register Notice
38 10/2019 03/2020: Final Rule Federal Register Notice
37 03/2017 01/2018: Final Rule Federal Register Notice
36 08/2014  
35 10/2010  
34 10/2007  
33 08/2005  
32 06/2003  
31 05/1999  
30 10/1994  
29 07/1993  
28 04/1992  
27 11/1990  
26 07/1989  
25 05/1998  
24 06/1986  
23 09/1985  
22 07/1984  
21 09/1983  
20 11/1982  
19 04/1982  
18 08/1981  
17 12/1980  
16 05/1980  
15 05/1979  
14 11/1978  
13 07/1978  
12 03/1978  
11 11/1977  
10 08/1977  
9 03/1977  
8 11/1976  
7 08/1976  
6 05/1976  
5 03/1976  
4 11/1975  
3 09/1975  
2 06/1975  
1 04/1975  
0 06/1974  
1.85 Materials code case Acceptability - - ASME Section III, Division 1
(Withdrawn See -- 69 FR 34202 06/18/2004) 		W 06/2004  
31 05/1999  
30 10/1994  
27 11/1990  
26 07/1989  
23 09/1985  
22 07/1984  
21 09/1983  
17 12/1980  
16 05/1980  
15 05/1979  
14 11/1978  
13 07/1978  
12 03/1978  
11 11/1977  
10 08/1977  
9 03/1977  
8 11/1976  
7 08/1976  
6 05/1976  
5 02/1976  
4 11/1975  
3 09/1975  
2 06/1975  
1 04/1975  
0 06/1974  
1.86 Termination of Operating Licenses for Nuclear Reactors
(Withdrawn -- See 81 FR 53507, 08/12/2016) 		W 08/2016  
0 06/1974  
1.87 Acceptability of ASME Code Section III, Division 5, 'High Temperature Reactors'
Supplement to ASME Section III Code Cases 1592, 1593, 1594, 1595, and 1596 (in 1975, RG 1.87 was issued as Revision 1)
3 08/2025  
2 01/2023  
1 06/1975 Periodic Review - February 2021 - Revise
 
Periodic Review – August 2019 – Withdraw
 
Periodic Review – August 2016 – Considerations
 
Periodic Review – November 2010 – No Action
1.88 Collection, Storage, and Maintenance of Nuclear Power Plant Quality Assurance Records
(Withdrawn -- See 56 FR 36175, 07/31/1991)		 W 07/1991  
2 10/1976  
1.89 Environmental Qualification of Certain Electric Equipment Important to Safety for Nuclear Power Plants 2 04/2023  
1 06/1984 Reviewed in 2018 – Revise

Periodic Review May 2014 - Revise
0 11/1974  
1.90 Inservice Inspection of Prestressed Concrete Containment Structures with Grouted Tendons 2 11/2012 Reviewed in 2018 – Issues Identified for future consideration
1 08/1977  
0 11/1974  
1.91 Evaluations of Explosions Postulated To Occur on Transportation Routes Near Nuclear Power Plants 3 11/2021  
2 04/2013 Periodic Review – June 2020 - Revise
1 02/1978  
0 01/1975  
1.92 Combining Modal Responses and Spatial Components in Seismic Response Analysis 3 09/2012 Reviewed in 2018 – Issues identified for future consideration
2 07/2006  
1 02/1976  
0 12/1974  
1.93 Availability of Electric Power Sources 1 03/2012 Reviewed in 2017 – No issues identified
0 12/1974  
1.94 Quality Assurance Requirements for Installation, Inspection, and Testing of Structural Concrete and Structural Steel During the Construction Phase of Nuclear Power Plants
(Withdrawn -- See 75 FR 54921, 09/09/2010) 		W 09/2010  
1 04/1976  
0 04/1975  
1.95 Protection of Nuclear Power Plant Control Room Operators Against an Accidental Chlorine Release
(Withdrawn -- See 67 FR 939 01/08/2002) 		W 01/2002  
1 01/1977  
1.96 Design of Main Steam Isolation Valve Leakage Control Systems for Boiling Water Reactor Nuclear Power Plants 1 06/1976 Periodic Review – August 2023 -Withdraw
 
Periodic Review - October 2013 – Considerations
0 05/1975  
1.97 Criteria for Accident Monitoring Instrumentation for Nuclear Power Plants 5 05/2019  
4 06/2006  
3 05/1983  
2 12/1980  
1 08/1977  
0 12/1975  
1.98 Assumptions Used for Evaluating the Potential Radiological Consequences of a Radioactive Offgas System Failure in a Boiling Water Reactor (for Comment) 0 03/1976 Reviewed in 2016 – Issues identified for future consideration
1.99 Radiation Embrittlement of Reactor Vessel Materials 2 05/1988 Periodic Review – November 2023 - Considerations

Technical Letter Report – July 2019 - Considerations

Periodic Review – January 2014 – No issues identified
1 04/1977  
0 07/1975  
1.100 Seismic Qualification of Electric and Mechanical Equipment for Nuclear Power Plants 4 05/2020  
3 09/2009  
2 06/1988  
1 08/1977  
0 03/1976  

Page Last Reviewed/Updated Thursday, September 04, 2025

Page Last Reviewed/Updated Thursday, September 04, 2025