It supersedes the previous editions of the CSA N CSA N The specific objectives of these Standards are as follows: - to establish technical requirements for pressure boundary items of CANDU power reactors, in a format that regulatory authorities can reference; - to establish requirements for each class of system, component, or support, consistent with the Nuclear Safety and Control Act Act and its Regulations; - to reference applicable requirements of the ASME BPVC where they are appropriate to CANDU power reactors; - to specify rules and material requirements for the design, fabrication, installation, quality assurance, and inspection of those pressure-retaining components and supports for which the ASME BPVC does not specify requirements; and - to establish rules for the periodic inspection of pressure-retaining components in CANDU nuclear power plants. The CSA N-Series Standards provide an interlinked set of requirements for the management of nuclear facilities and activities. CSA N provides overall direction to management to develop and implement sound management practices and controls while the other CSA Group nuclear Standards provide technical requirements and guidance that support the management system.

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This Standard specifies the requirements for the quality assurance program applicable to the design, development, maintenance, modification, acquisition, and use of analytical, scientific, and design computer programs that are used in high energy reactor applications. Note: High energy reactor as defined in Clause 7. Such computer programs are used by or for the business to perform or support a design and analysis of equipment, systems, structures, and components that impact safety, as identified by management; b deterministic and probabilistic safety analyses and operational reliability studies; c reactor physics and fuel management calculations; and d transfer of data between computer programs or pre- or post-processing calculations associated with Items a , b , and c of Clause The quality assurance requirements for software used to perform or support the activities are described in this Standard.

This Standard recognizes that the scope has two parts and has been organized to reflect this: a design, development and maintenance of software; and b acquisition, qualification, control and use of software.

This Standard applies to software used by or for the business as described in Clause 1. Simple software may be excluded from requirements of this Standard with the exception of Clause Interpretation or application of computer program results in design and analysis activities is outside the scope of this Standard. All of the requirements of this Standard may be applied in a graded manner commensurate with risk as permitted by Clause 4 of CSA N 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 nonmandatory to define their application.


CSA N285.0-08 / N285.6 SERIES-08





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