Norm

ISO/DIS 22765:2016 en

Sintered (U, Pu)O2 pellets - Guidance for ceramographic preparation for microstructure examination

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Over deze norm

Status Ontwerp
Aantal pagina's 6
Gepubliceerd op 06-06-2016
Taal Engels
This guide 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, -  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. The measurement of individual grain sizes requires uniform development of the microstructure over the entire specimen. The plutonium cluster and pore distribution and localisation are generally analysed by automatic image analysis systems. The plutonium distribution is usually revealed by chemical etching but alphaautoradiography 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.

Details

ICS-code 27.120.30
Engelse titel Sintered (U, Pu)O2 pellets - Guidance for ceramographic preparation for microstructure examination
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