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:
§ 50.49 Environmental qualification of electric equipment important to safety for nuclear power plants. ( a ) Each holder of or an applicant for an operating license issued under this part, or a combined license or manufacturing license issued under part 52 of this chapter , other than a nuclear power plant for which the certifications required under § 50.82(a)(1) or § 52.110(a)(1) of this chapter have been submitted, shall establish a program for qualifying the electric equipment defined in paragraph (b) of this section. For a manufacturing license, only electric equipment defined in paragraph (b) which is within the scope of the manufactured reactor must be included in the program. ( b ) Electric equipment important to safety covered by this section is: ( 1 ) Safety-related electric equipment. [ 3 ] ( i ) This equipment is that relied upon to remain functional during and following design basis events to ensure— ( A ) The integrity of the reactor coolant pressure boundary; ( B ) The capability to shut down the reactor and maintain it in a safe shutdown condition; or ( C ) The capability to prevent or mitigate the consequences of accidents that could result in potential offsite exposures comparable to the guidelines in § 50.34(a)(1) , § 50.67(b)(2) , or § 100.11 of this chapter , as applicable. ( ii ) Design basis events are defined as conditions of normal operation, including anticipated operational occurrences, design basis accidents, external events, and natural phenomena for which the plant must be designed to ensure functions (b)(1)(i) (A) through (C) of this section. ( 2 ) Nonsafety-related electric equipment whose failure under postulated environmental conditions could prevent satisfactory accomplishment of safety functions specified in sub paragraphs (b)(1)(i)(A) through (C) of this section by the safety-related equipment. ( 3 ) Certain post-accident monitoring equipment. [ 4 ] ( c ) Requirements for ( 1 ) dynamic and seismic qualification of