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:
askets, lubricants, fluids for hydraulic systems, and diaphragms). The reviewer confirms that the applicant has (1) identified safety-related mechanical equipment located in harsh and mild environment areas, including its required operating time; (2) identified nonmetallic subcomponents of such equipment; (3) identified the environmental conditions and process parameters for which this equipment must be qualified; (4) identified nonmetallic material capabilities; and (5) evaluated environmental effects. 20. Appendix QR-B, “Guide for Qualification of Nonmetallic Parts,” of ASME QME-1-2007 as endorsed in RG 1.100 (Revision 3), provides a methodology and documentation of records that the staff finds acceptable to demonstrate that non-metallic parts of mechanical equipment are designed to accommodate the effects of environmental conditions. The environmental design of non-metallic parts for mechanical equipment should consider both the external and internal service conditions of the component. The applicant should apply ASME QME-1-2007, Appendix QR-B, as accepted in RG 1.100 (Revision 3) or describe a suitable alternative in its application for NRC staff review. 21. For electrical, I&C and mechanical equipment important to safety located in a mild environment, the applicant might describe a process in its DCD/FSAR for environmental design through “design/purchase” specifications that demonstrate the capability of the equipment to perform under its applicable environmental conditions in compliance with 10 CFR Part 50, Appendix A. The specifications must contain a description of the functional requirements for a specific environmental zone during normal environmental conditions and anticipated operational occurrences. For non-metallic parts of mechanical equipment, the specification must also contain the internal service conditions of the component. A certificate of compliance provides documentation that the equipment is capable of performing its design function