Document: NUREG-0800
Document ID: 63521156-eb6b-472c-9560-1e85462dc1be
Document Type: srp
Title: ENVIRONMENTAL QUALIFICATION OF MECHANICAL AND ELECTRICAL
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070288.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.11
CFR Part: 
CFR Title: 

Content:
rmal and accident conditions (i.e., environmental qualification) along with the importance of the safety function to be performed and the effects of natural phenomena. SRP Section 3.11 describes staff positions related to the environmental qualification of electrical and mechanical equipment important to safety. These staff positions require that applicants consider all normal, accident, and postaccident environments (including those resulting from anticipated operational occurrences) in the design, testing, and quality assurance of such equipment. The reviewer also considers information gathered by the staff from reviews conducted by other branches regarding such factors as aging, exposure of equipment to radiation, exposure to chemicals, and exposure to other environmental stressors (e.g., those resulting from severe natural phenomena). Meeting the requirements of GDC 2 provides assurance that equipment important to safety will be environmentally qualified and will be capable of performing its intended safety function.115 3. Compliance with General Design Criterion 4 (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 DRAFT Rev. 3 - April 1996 3.11-12 those of missiles, pipe whipping, and discharging fluids, that may result from equipment failures and from events and conditions outside the nuclear power unit. SRP Section 3.11 describes general and specific staff positions on reviewing an applicant's programs for the environmental qualification of electrical and mechanical equipment. These staff positions reference the requirements in IEEE Std 323, NUREG-0588, and Regulatory Guide 1.89. The scope of IEEE Std 323 includes principles, procedures, and methods of