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:
r 2017 essential in preventing significant release of radioactive material to the environment, B. Equipment that initiates the above functions automatically, C. Equipment that is used by the operators to initiate the above functions manually, D. Equipment whose failure can prevent the satisfactory accomplishment of one or more of the above safety functions, E. Other electrical equipment important to safety, as described in 10 CFR 50.49(b)(1) and (2), F. Certain post-accident monitoring equipment, as described in 10 CFR 50.49(b)(3) and RG 1.97, and G. Protection and safety systems as described in 10 CFR 50.55a(h) and RG 1.209. 2. Section 3.11 of the SAR/FSAR or the DCD is reviewed to determine whether the required environmental design and qualification of all equipment important to safety will be, or has been adequately demonstrated. The term “environmental qualification” means verification of design, limited to demonstrating that electrical or mechanical or I&C equipment are capable of performing their safety function under significant environmental stresses (i.e., harsh environments) resulting from design basis events in order to avoid common-cause failure. Environmental design requirements apply to all equipment important to safety (i.e., both mild and harsh environments). 3. At the construction permit (CP) stage, the staff review considers the conceptual approach for meeting the environmental design and qualification requirements addressing the following areas: A. Identification of all mechanical, electrical, and I&C equipment required to perform the functions defined in Subsection I, Item 1, above. B. Identification of the environmental design bases for the equipment identified, including the definition of anticipated operational occurrences and normal, accident, and post-accident environments. C. Requirements for documentation of the qualification tests and analyses that have been, or will be performed on the equipment to meet the design bases. D.