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:
equirements of 10 CFR 50.49. Regulatory Guide 1.89 provides additional guidance and references the requirements specified in IEEE Std 323. These requirements relate directly to ensuring the acceptable performance of the protection system when its components are exposed to adverse environments, as discussed in GDC 23. Meeting the requirements of GDC 23 provides assurance that the protection system will be environmentally qualified and will be capable of performing its intended safety function.117 5. Compliance with 10 CFR 50.34(f)(2)(ix) requires that equipment needed to achieve and maintain safe shutdown of the plant and to maintain containment integrity will perform its safety function during and after exposure to the environmental conditions associated with the release of hydrogen generated by the equivalent of a 100% fuel-clad metal-water reaction, including the environmental conditions created by activation of the hydrogen control system. Further, if the method chosen for hydrogen control is a postaccident 3.11-13 DRAFT Rev. 3 - April 1996 inerting system, inadvertent actuation of the system should be safely accommodated during plant operation. Subsection II.C(11) of SRP Section 3.11 includes criteria for the qualification or protection of equipment needed to achieve and maintain safe shutdown of the plant from hydrogen release or control. These criteria were adapted from 10 CFR 50.34(f)(2)(ix) to address the requirement. Meeting these requirements provides assurance that equipment subject to hydrogen release or control measures will perform its intended safety functions and will prevent or mitigate the release of radioactive material.118 6. Compliance with 10 CFR 50.49, "Environmental Qualification of Electric Equipment Important to Safety for Nuclear Power Plants," requires that the applicant establish a program, as described therein, for qualifying electrical equipment important to safety located in a harsh environment. SRP Section 3.11 provides staff