N287.2-17

1.1 This Standard provides requirements for the materials used for concrete containment structures, which include, but are not limited to, the following structural and non-structural elements: a) concrete; b) reinforcement (pre-stressed and non-pre-stressed); c) steel (e.g., liner, embedded parts, anchors); d) non-metallic liners and coating systems; and e) joint sealants. Note: For material requirements for safety-related structures, refer to CSA N291. 1.2 This Standard is applicable to existing and new nuclear power plants. It is not the intent that the requirements of this Standard be applied retroactively to existing nuclear power plants, unless as agreed to by the AHJ. 1.3 This Standard is used in concert with the following standards, as applicable: a) CSA N287.1, which outlines general requirements for concrete containment structures for nuclear power plants; and b) CSA N287.8, which outlines aging management requirements for concrete containment structures for nuclear power plants. 1.4 In this Standard, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the Standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard. Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material. Notes to tables and figures are considered part of the table or figure and may be written as requirements. Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application. 1.5 In this Standard, “shall be considered” or “shall consider” means that the user evaluates the impact and documents any decisions. Note: Examples can include no action, operating procedures, or design features.