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This document provides an overview of the requirements of Welding Requirements CSA-N287.3 Design Requirements for Concrete Containment Structures for CANDU Nuclear Power Plants with respect to welding. It is designed to provide general requirements for the design of concrete containment structures of a containment system, designated as “class containment" components and parts, as defined in CSA Standard N287.1.

This document is only for general guidance purposes; reference to the full text of CSA N287.3 should be made.