BS EN ISO 22765:2019 - Nuclear fuel technology. Sintered (U,Pu)O<sub>2</sub> pellets. Guidance for ceramographic preparation for microstructure examination

BS EN ISO 22765:2019

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

Status : Current   Published : December 2016

Format
PDF

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HARDCOPY



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.




Standard NumberBS EN ISO 22765:2019
TitleNuclear fuel technology. Sintered (U,Pu)O2 pellets. Guidance for ceramographic preparation for microstructure examination
StatusCurrent
Publication Date31 December 2016
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)ISO 3696, ASTM E112
International RelationshipsEN ISO 22765:2019,ISO 22765:2016
Amended ByCorrigendum, June 2019
DescriptorsDimensions, Stress concentration, Powder metallurgy, Sintered products, Metals, Identification methods, Dies (press tools), Fatigue testing, Test specimens, Radius, Design
ICS27.120.30
Title in FrenchKernbrennstofftechnologie. Gesinterte (U,Pu)O2- Pellets. Leitfaden für die keramographische Herstellung der Proben zur Untersuchung des Feingefüges
Title in GermanKernbrennstofftechnologie. Gesinterte (U,Pu)O2-Pellets. Leitfaden für die keramographische Herstellung der Proben zur Untersuchung des Feingefüges
CommitteeNCE/9
ISBN978 0 539 03036 5
PublisherBSI
FormatA4
DeliveryYes
Pages14
File Size531 KB
Price£110.00


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