Draft Details

1.1  General

This Standard provides aging management requirements for concrete containment structures and their elements for nuclear power plants and is directed to the owners/operating organizations, designers, manufacturers, fabricators, and constructors of the concrete containment structures and their elements.

Concrete containment structures include the following structural and non-structural elements:

concrete;

reinforcement (pre-stressed and non-prestressed);

steel (e.g. liner, embedded parts, anchors);

non-metallic liners and coating systems;

joint sealants and water stops; and

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

Notes: This Standard may provide guidance for aging management of other concrete structures where applicable.

The aging management requirements for containment components are provided in CSA N290.20.

1.2  Existing concrete containment structures

This Standard provides requirements for aging management of existing concrete containment structures to address emerging challenges and ensure that existing concrete containment structures and their elements satisfy their functional and performance requirements in all different phases of their life cycle.

Note: The requirements of the CSA N287 series of Standards can be different depending on the phase of the life cycle of the structure, including design, construction, commissioning, operation (including long-term operation and extended shutdown), and decommissioning.

1.3  New concrete containment structures

This Standard provides requirements for aging management of new concrete containment structures to ensure that

aging is addressed during design and construction phases; and

concrete containment structures and their elements satisfy their functional and performance requirements in all phases of their life cycle.

1.4 Interface

This Standard is used in concert with the other N287 series of Standards 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.