Document: NUREG-0800
Document ID: a5f6fd7c-4062-40ac-b548-0ddba421091d
Document Type: srp
Title: ENVIRONMENTAL QUALIFICATION OF MECHANICAL AND ELECTRICAL
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0636/ML063600397.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.11
CFR Part: 
CFR Title: 

Content:
er the acceptance criteria of this SRP section. Mechanical, electrical, and I&C equipment covered by this SRP section include the following: A. Equipment associated with systems that are essential for emergency reactor shutdown, containment isolation, reactor core cooling, and containment and reactor heat removal, or otherwise are 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), and F. Certain post-accident monitoring equipment, as described in 10 CFR 50.49(b)(3) and Regulatory Guide 1.97. 2. Section 3.11 of the SAR 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 3.11-3 Revision 3 - March 2007 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 systems 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