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BS EN ISO 22765:2019

Current
Current

The latest, up-to-date edition.

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

BS ISO 22765:2016

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

21-06-2019

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

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.

Committee
NCE/9
DocumentType
Standard
ISBN
9780539030365
Pages
14
PublisherName
British Standards Institution
Status
Current

Standards Relationship
ISO 22765:2016 Identical
EN ISO 22765:2019 Identical

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