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About This Item

 

Full Description

Preface

This is the second edition of CSA N291, Requirements for safety-related structures for nuclear power plants. It supersedes the previous edition published in 2008 under the title Requirements for safety-related structures for CANDU nuclear power plants. The title has been changed to reflect a change in scope, from addressing only CANDU reactors to including all types of nuclear power plants.

Note: CANDU (CANada Deuterium Uranium) is a registered trademark of Atomic Energy of Canada Limited (AECL).

This Standard specifies requirements for the material, analysis & design, construction, fabrication, inspection, examination and aging management of safety-related structures constructed of structural steel, reinforced concrete, and reinforced masonry. The minimum design requirements specified in this Standard follow the requirements of CSA A23.3, CSA S16, CSA S304.1, and the National Building Code of Canada. Additional requirements reference the CSA N287 series and the CSA N289 series of Standards.

This Standard provides a general definition of safety-related structures rather than a comprehensive listing of all safety-related structures. The analysis and design of structures cover static and dynamic loads, and the loads, load factors, load combinations, and safety criteria cover service loads and abnormal/environmental loads. This Standard also covers the design and analysis of irradiated fuels and radioactive waste storage facilities.

The CSA N-Series of Standards provides an interlinked set of requirements for the management of nuclear facilities and activities. CSA N286 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. This Standard works in harmony with CSA N286 and does not duplicate the generic requirements of CSA N286; however, it may provide more specific direction for those requirements.

The users of this Standard are reminded that an authority having jurisdiction (AHJ) such as the Canadian Nuclear Safety Commission might impose additional requirements to those specified in this Standard.

Scope

1.1
This Standard specifies requirements for the material, analysis and design, construction, fabrication, inspection, examination, and aging management of safety-related structures for nuclear power plants. Safety-related structures covered in this Standard are

a) structures that support, house, or protect nuclear safety systems;

b) components of structures that are required for the safe operation and/or safe shutdown of the reactor;

c) structures for the storage of wet and dry irradiated fuel; and

d) structures for the storage of radioactive waste material as agreed with the AHJ.

1.2
This Standard does not apply to concrete containment structures covered in the CSA N287 series or the pressure-retaining systems and components covered in CSA N285.0.

1.3
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.

 

Document History

  1. CSA N291:19


    Requirements for nuclear safety-related structures

    • Most Recent
  2. CAN/CSA N291-15

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    Requirements for Safety-Related Structures for Nuclear Power Plants

    • Historical Version
  3. CAN/CSA N291-08 (R2013)


    Requirements for Safety-Related Structures for CANDU Nuclear Power Plants, Includes Update No. 1 (2011), Update No. 2 (2014)

    • Historical Version