NF ISO 27468

NF ISO 27468

September 2011
Standard Current

Nuclear criticality safety - Evaluation of systems containing PWR UOX fuels - Bounding burnup credit approach

ISO 27468:2011 establishes an evaluation methodology for nuclear criticality safety with burnup credit. It identifies important parameters and specifies requirements, recommendations, and precautions to be taken into account in the evaluations. It also highlights the main important technical fields to ensure that the fuel composition or history considered in calculations provides a bounding value of the effective neutron multiplication factor, keff.ISO 27468:2011 is applicable to transport, storage, disposal or reprocessing units implying irradiated fissile material from pressurized water reactor (PWR) fuels that initially contain uranium oxide (UOX).Fuels irradiated in other reactors (e.g. boiling water reactors) and fuels that initially contain mixed uranium-plutonium oxide are not covered in ISO 27468:2011.ISO 27468:2011 does not specify requirements related to overall criticality safety evaluation or eventual implementation of burnup credit.

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Main informations

Collections

National standards and national normative documents

Publication date

September 2011

Number of pages

19 p.

Reference

NF ISO 27468

ICS Codes

27.120.30   Fissile materials and nuclear fuel technology

Classification index

M60-441

Print number

1 - 26/08/2011

International kinship

ISO 27468:2011
Sumary
Nuclear criticality safety - Evaluation of systems containing PWR UOX fuels - Bounding burnup credit approach

ISO 27468:2011 establishes an evaluation methodology for nuclear criticality safety with burnup credit. It identifies important parameters and specifies requirements, recommendations, and precautions to be taken into account in the evaluations. It also highlights the main important technical fields to ensure that the fuel composition or history considered in calculations provides a bounding value of the effective neutron multiplication factor, keff.

ISO 27468:2011 is applicable to transport, storage, disposal or reprocessing units implying irradiated fissile material from pressurized water reactor (PWR) fuels that initially contain uranium oxide (UOX).

Fuels irradiated in other reactors (e.g. boiling water reactors) and fuels that initially contain mixed uranium-plutonium oxide are not covered in ISO 27468:2011.

ISO 27468:2011 does not specify requirements related to overall criticality safety evaluation or eventual implementation of burnup credit.

Table of contents
  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes et définitions
    1
  • 4 Méthodologie des évaluations de sûreté-criticité tenant compte de la combustion massique du combustible
    3
  • 5 Mise en oeuvre des évaluations de sûreté-criticité tenant compte de la combustion massique du combustible
    7
  • Annexe A (informative) Validation des codes d'évolution à partir des données des examens post-irradiation
    8
  • Annexe B (informative) Mise en oeuvre opérationnelle d'une application de crédit burnup
    9
  • Bibliographie
    10
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