Document: 10 CFR Part 50
Document ID: 1c9db254-4b16-4016-8411-63ac96dc3718
Document Type: cfr
Title: Environmental qualification of electric equipment important to safety for nuclear power plants.
Source: 10 CFR Part 50
Source URL: https://www.ecfr.gov/current/title-10/part-50/section-50.49
Revision Date: 
Chapter: 
Section ID: 50.49
CFR Part: 50
CFR Title: 10

Content:
in Operating Reactors,” November 1979 (DOR Guidelines), or NUREG-0588 (For Comment version), “Interim Staff Position on Environmental Qualification of Safety-Related Electrical Equipment.” ( l ) Replacement equipment must be qualified in accordance with the provisions of this section unless there are sound reasons to the contrary. [ 48 FR 2733 , Jan. 21, 1983, as amended at 49 FR 45576 , Nov. 19, 1984; 51 FR 40308 , Nov. 6, 1986; 51 FR 43709 , Dec. 3, 1986; 52 FR 31611 , Aug. 21, 1987; 53 FR 19250 , May 27, 1988; 61 FR 39300 , July 29, 1996; 61 FR 65173 , Dec. 11, 1996; 62 FR 47271 , Sept. 8, 1997; 64 FR 72001 , Dec. 23, 1999; 66 FR 64738 , Dec. 14, 2001; 72 FR 49495 , Aug. 28, 2007; 80 FR 45843 , Aug. 3, 2015] Footnotes - 50.49 [ 3 ] Safety-related electric equipment is referred to as “Class 1E” equipment in IEEE 323-1974. Copies of this standard may be obtained from the Institute of Electrical and Electronics Engineers, Inc., 345 East 47th Street, New York, NY 10017. [ 4 ] Specific guidance concerning the types of variables to be monitored is provided in Revision 2 of Regulatory Guide 1.97, “Instrumentation for Light-Water-Cooled Nuclear Power Plants to Assess Plant and Environs Conditions During and Following an Accident.” Copies of the Regulatory Guide may be purchased through the U.S. Government Publishing Office by calling 202-512-1800 or by writing to the U.S. Government Publishing Office, P.O. Box 37082, Washington, DC 20013-7082.