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:
the equipment needed to achieve and maintain safe shutdown of the plant and to maintain containment integrity should be environmentally qualified in accordance with the provisions of this SRP section and the following criteria. The equipment should be qualified or protected so that it will perform its safety function during and after exposure to environmental conditions resulting from the release of hydrogen generated by the equivalent of a 100% fuel-clad metal-water reaction. The postulated environmental conditions should include those created by activation of the hydrogen control system. If the method chosen for hydrogen control is a postaccident inerting system, inadvertent actuation of the system during plant operation should be considered.103 Mechanical components should be designed to be compatible with postulated environmental conditions, including those associated with loss-of-coolant accidents DRAFT Rev. 3 - April 1996 3.11-10 (LOCAs). A process should be established to determine the suitability of materials, parts, and equipment needed for safety-related functions and to verify that the design of such materials, parts, and equipment is adequate. Equipment qualification records should be maintained and should include the results of tests and materials analyses. For mechanical equipment, the staff concentrates its review on materials that are sensitive to environmental effects (e.g., seals, gaskets, lubricants, fluids for hydraulic systems, and diaphragms). The reviewer should (1) identify safety-related mechanical equipment located in harsh environment areas, including its required operating time; (2) identify nonmetallic subcomponents of such equipment; (3) identify the environmental conditions for which this equipment must be qualified; (4) identify nonmetallic material capabilities; and (5) evaluate environmental effects.104 D. MILD ENVIRONMENT (1) The environmental qualification of all electrical and mechanical equipment located in thea mild