Containment design requirements

Containment is a very complex system, especially for multi-unit generating stations; it is the last physical barrier in the Canadian defence-in-depth philosophy to reactor safety; it is one of the four Special Safety Systems; it's design is therefore subject to a comprehensive set of requirements. Ontario Hydro produces Nuclear Safety Design Guides for use in the design of its Nuclear Generating Stations. Compliance with the Design Guides is mandatory. They contain requirements which input to formal project documents - called 'Design Requirements' and 'Design Descriptions' - which form the basis for detailed design and procurement activities. The Design Guides are based on the principles given in the Atomic Energy Control Board's Consultative Document C-7, entitled 'Requirements for Containment Systems for CANDU Nuclear Power Plants'. This presentation summarizes the Basic and Design Requirements for Containment and describes how certain features of Ontario Hydro's Darlington Containment design meets them. Requirements for Testing and Operation are not addressed here since they are still under review within Ontario Hydro