International Standard
ISO 22765:2016
Nuclear fuel technology — Sintered (U,Pu)O2 pellets — Guidance for ceramographic preparation for microstructure examination
Reference number
ISO 22765:2016
Edition 1
2016-12
International Standard
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ISO 22765:2016
63947
Published (Edition 1, 2016)

ISO 22765:2016

ISO 22765:2016
63947
Language
Format
CHF 63
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Abstract

ISO 22765:2016 describes the ceramographic procedure used to prepare sintered (U,Pu)O2 pellets for qualitative and quantitative examination of the pellet microstructure.

The examinations are performed before and after thermal treatment or chemical etching.

They allow

- observation of any cracks, intra- and intergranular pores or inclusions, and

- measurement of the grain size, porosity and plutonium homogeneity distribution.

The mean grain diameter is measured by one of the classic methods: counting (intercept method), comparison with standard grids or typical images, etc.[2] The measurement of individual grain sizes requires uniform development of the microstructure over the entire specimen.

The plutonium cluster and pore distribution and localization are generally analysed by automatic image analysis systems. The plutonium distribution is usually revealed by chemical etching but alpha-autoradiography can also be used. The first technique avoids the tendency for autoradiography to exaggerate the size of plutonium-rich clusters due to the distance the alpha particles travel away from the source.

General information

  •  : Published
     : 2016-12
    : International Standard to be revised [90.92]
  •  : 1
     : 7
  • ISO/TC 85/SC 5
    27.120.30 
  • RSS updates

Next version under development

Draft International Standard
ISO/DIS 22765
Nuclear fuel technology — Sintered (U,Pu)O2 pellets — Guidance for ceramographic preparation for microstructure examination
Reference number
ISO/DIS 22765
Edition 1
Draft
International Standard

ISO/DIS 22765

Nuclear fuel technology — Sintered (U,Pu)O2 pellets — Guidance for ceramographic preparation for microstructure examination

ISO/DIS 22765

ISO/DIS 22765
86041
Language
Format
CHF 63
Convert Swiss francs (CHF) to your currency

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