Document: NUREG-0800
Document ID: 478329d7-b28f-4334-99e3-c149e19d1cdd
Document Type: srp
Title: ENVIRONMENTAL QUALIFICATION OF MECHANICAL AND ELECTRICAL EQUIPMENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340658.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.11
CFR Part: 
CFR Title: 

Content:
used to implement the requirements of General Design Criterion 4 are as follows: Simply stated, the general requirements for environmental design and qualifica- tion are as follows: (1) The equipment shall be designed to have the capability of performing its design safety functions under all normal, abnormal, accident, and postaccident environments and for the length of time for which its function is required. (2) The equipment environmental capability shall be demonstrated by appropriate testing and analyses. (3) A quality assurance program meeting the requirements of 10 CFR 50 Appendix B shall be established and implemented to provide assurance that all requirements have been satisfactorily accom- plished. The environmental design of mechanical and electrical equipment is acceptable when it can be ascertained that all three requirements are met. At the time of the CP and OL application, complete and auditable records must be available and maintained at a central location which describe the environ- mental qualification method used for all mechanical and electrical equipment in sufficient detail to document the degree of compliance with the require- ments discussed herein. Thereafter, such records should be updated and maintained current as equipment is replaced, tested, or otherwise qualified. Harsh Environment The specific criteria for assessing the acceptability of the environmental qualification program of OL applicants are provided in NUREG-0588, "Interim Staff Position on Environmental Qualification of Safety-Related Electrical Equipment," issued in December 1979. NUREG-0588 includes two sets of qualifi- cation requirements, Category I and Category II, which relate to IEEE 323-1974 3.311-3 Rev. 2 - July 1981 and 1971 respectively. Category II is for plants whose construction permit SERs were dated before July 1, 1974 unless the licensee made a commitment in the construction permit record to use the 1974 standard, or unless the operating license application