1. Scope 1.1 This Standard provides the requirements for pre-operational proof tests and leakage rate tests of concrete containment structures of a containment system designed as Class Containment components. Note: Other components and appurtenances of the containment syst em may be tested coincident with the tests in this Standard, provided the intent of this Standard is observed and the requirements of CSA Standard CAN/CSA-N285.0 are considered.