Draft Details

1.1 General

This Standard specifies the requirements, criteria, methods of analysis, and design procedures for

determining the design response spectra and ground motion time-histories to be used in the analysis;

establishing design criteria for structures, systems and components (SSCs), and supports that require seismic qualification; and

performing seismic analyses, including the effects of the soil-structure-interaction.

1.2  Applications

This Standard applies to SSCs in nuclear power plants that require seismic qualification by analytical methods (see CSA N289.1). This Standard may also be applied to SSCs that might not require explicit seismic qualification as deemed appropriate by the operating organization or by authorities having jurisdiction (AHJ).

1.3  Other Applications

This Standard may be applied, as appropriate, to other nuclear facilities under the jurisdiction of the Nuclear Safety and Control Act.

1.4  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.