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    • N285.0-08/N285.6 SERIES-08

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

    General requirements for pressure-retaining systems and components in CANDU nuclear power plants/Material Standards for reactor components for CANDU nuclear power plants
    SKU: 2419230 Published by CSA Group Publication Year 2008 316 pages Withdrawn

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    • Preface/Scope
    Preface

    This is the first edition of CSA N285.0/N285.6 Series, General requirements for pressure-retaining systems and components in CANDU nuclear power plants/Material Standards for reactor components for CANDU nuclear power plants. It supersedes the previous editions of CSA N285.0 published in 2006, 1995, 1991, and 1981, and the previous editions of the CSA N285.6 Series published in 2005 and 1988.

    ---------------------------------------------------------

    N285.0-08 General requirements for pressure-retaining systems and components in CANDU nuclear power plants.

    1. Scope


    1.1 This Standard specifies the technical requirements for the design, procurement, fabrication, installation, modification, repair, replacement, testing, examination, and inspection of, and other work related to, pressure-retaining and containment systems, components, and supports over the service life of a CANDU nuclear power plant.

    1.2 This Standard applies to all pressure-retaining systems, including their components and supports, in a CANDU nuclear power plant.

    1.3 This Standard applies to containment components, but does not apply to concrete containment structures.

    1.4 In CSA Standards, 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; may is used to express an option or that which is permissible within the limits of the standard; and can is used to express possibility or capability. 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.

    1.5 The values given in SI (metric) units are the standard. The values given in parentheses are for information only.

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    N285.6.1-08 Pressure tubes for use in CANDU fuel channels

    Scope


    This Standard specifies requirements for the fabrication and properties of seamless zirconium-2.5wt % niobium (Zr-2.5Nb) alloy pressure tubes for use in fuel channels in CANDU reactors.

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    N285.6.2-08 Seamless zirconium alloy tubing for reactivity control units

    Scope


    This Standard specifies requirements for the fabrication and properties of seamless zirconium alloy tubing, Grades R60802 and R60804, with diameter to wall thickness ratios less than 80. This tubing is used for reactivity control units in CANDU reactors.

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    N285.6.3-08 Annealed seamless zirconium alloy tubing for liquid injection shutdown system (LISS) nozzles

    Scope


    This Standard specifies requirements for the fabrication and properties of seamless zirconium-tin alloy tubing, Grade R60802 or R60804, which is suitable for use in liquid injection shutdown system (LISS) nozzles located in the moderator water in the core of a CANDU reactor.

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    N285.6.4-08 Thin-walled, large-diameter zirconium alloy tubing

    Scope


    This Standard specifies requirements for the fabrication and properties of thin-walled, large-diameter tubing made from zirconium-tin alloys, Grade R60802 or R60804. Notes: (1) Thin-walled, large diameter tubing has a diameter to wall thickness ratio greater than 50. (2) This tubing can be used as calandria tubes and as tubes for reactivity control units in a CANDU reactor, and may be processed in the seamless or seam-welded condition.

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    N285.6.6-08 Non-destructive examination criteria for zirconium alloys

    1. Scope


    1.1 This Standard specifies requirements for non-destructive examinations (NDEs) of zirconium alloy components during manufacturing. NDE methods include visual, radiographic, liquid-penetrant, ultrasonic, and eddy current techniques.

    1.2 Other standards may be used for the NDE of zirconium alloys, provided that they satisfy the requirements of this Standard.

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    N285.6.7-08 Zirconium alloy design data

    Scope


    This Standard specifies the physical and mechanical property data to be used in the design of the zirconium alloy components specified in the CSA N285.6 Series.

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    N285.6.8-08 Martensitic stainless steel for fuel-channel end fittings

    1. Scope


    1.1 This Standard specifies requirements for martensitic stainless steel forged blanks for the fuel-channel end fittings of a CANDU reactor.

    1.2 Design data for end-fitting material are given in the following tables in Annex A.

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    N285.6.9-08 Materials for supports for pressure-retaining items

    Scope


    This Standard specifies requirements for material for the support of pressure-retaining items in CANDU nuclear power plants. The materials covered in this Standard are in addition to the materials permitted by the ASME Boiler and Pressure Vessel Code (BPVC), Section III, Division 1, NF-2000, and Code Cases.

    ---------------------------------------------------------

    N285.6.10-08 Nickel-based alloy wire for fuel-channel spacers

    Scope


    This Standard specifies requirements for the nickel-based alloy (UNS N07750) wire used to form spacers for use between the pressure tubes and calandria tubes in the fuel channels in a CANDU reactor.

    ---------------------------------------------------------

    N285.6.11-08 Zirconium alloy wire

    Scope


    This Standard specifies requirements for wires made from zirconium-tin alloy, Grade R60802 or R60804, used in the welding of zirconium components and in the manufacture of the spacers that are installed between pressure tubes and calandria tubes in the fuel channels in a CANDU reactor.
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