Document: NUREG-0800
Document ID: 9bcad4cd-a055-4dc1-9315-db9d703e6f6f
Document Type: srp
Title: ENVIRONMENTAL QUALIFICATION OF MECHANICAL AND ELECTRICAL
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1634/ML16343A167.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.11
CFR Part: 
CFR Title: 

Content:
ection that are subject to environmental design and qualification must have auditable records to document that environmental design and qualification requirements have been met. Meeting GDC 1 provides assurance that the equipment is of sufficiently high quality to be capable of performing their design safety functions acceptably during all anticipated operating conditions and that appropriate records are maintained to document meeting these requirements. 4. GDC 2, “Design Bases for Protection against Natural Phenomena,” requires that components important to safety be designed to withstand the effects of natural 3.11 -18 Draft Revision 4 – December 2017 phenomena such as earthquakes, tornadoes, hurricanes, floods, tsunami, and seiches without loss of capability to perform their safety function. GDC 2 is applicable to this section since the design bases for components important to safety must consider the effects of the most severe natural phenomena anticipated for the site, together with normal and accident plant operating conditions and the importance of the safety function to be performed. Components in the scope of this section that are subject to environmental design and qualification must consider environmental conditions/stressors resulting from natural phenomena as part of the environmental conditions evaluated. Meeting GDC 2 provides assurance that appropriate combinations of the effects of normal and accident conditions resulting from the effects of the natural phenomena are considered in meeting the environmental design and qualification requirements. 5. Compliance with GDC 4, “Environmental and Dynamic Effects Design Bases,” requires that components important to safety be designed to accommodate the effects of, and be compatible with, the environmental conditions associated with normal operation, maintenance, testing, and postulated accidents, including LOCAs. Components must be protected against dynamic effects, including those of missiles, pipe