Draft Details

1.1 General

This Standard provides requirements for in‑service examinations of concrete containment structures which includes, but is 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;

e) joint sealants and water stops; and

f) elements necessary to support containment structure (e.g. foundations).

Note: In-service examination and testing in accordance with this standard form an integral part of the overall aging management of concrete containment structure. CSA N287.8 defines requirements for aging management of concrete containment structure.

1.2 Integrated leakage rate tests (ILRTs)

This Standard also provides requirements for integrated leakage rate testing (ILRT) of the containment boundary.

1.3 Interface with CSA N285.5

In-service examination of containment system components designed in accordance with the CSA N285 series of Standards are beyond the scope of this Standard.

Note: CSA N285.5 provides requirements for periodic inspection of CANDU nuclear power plant containment components that are made of metallic or plastic materials and that form the containment boundary or are part of fluid handling systems that penetrate the containment structure.

1.4 Interface with other CSA N287 standards

This Standard is used in concert with the other standards of CSA N287 series, as applicable.

1.5 Terminology

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.

1.6 Use of shall consider and shall be considered

In this Standard, “shall be considered” or “shall consider” means that the user evaluates the impact and documents any decisions.

Note: Examples of decision outcomes can include no action, revised operating procedures, design features.