NA 062

DIN Standards Committee Materials Testing

Project

Nuclear fuel technology - Guidelines for ceramographic preparation of UO₂ sintered pellets for microstructure examination (ISO 16793:2018); English version prEN ISO 16793:2020

Abstract

This document describes the ceramographic preparation of uranium dioxide (UO2) sintered pellets for qualitative and quantitative microstructure examinations.These examinations can be carried out before and after thermal or chemical etching.They enable- observations of fissures, inter- or intra-granular pores and inclusions, and- measurement of pore and grain size and measurement of pore and grain size distributions.The measurement of average grain size can be carried out using a classical counting method as described in ISO 2624 or ASTM E112[3], i.e. intercept procedure, comparison with standard grids or reference photographs.The measurement of pore-size distributions is usually carried out by an automatic image analyser. If the grain-size distributions are also measured with an image analyser, it is recommended that thermal etching be used to reveal the grain structure uniformly throughout the whole sample.

Begin

2020-07-08

WI

00430067

Planned document number

DIN EN ISO 16793

Project number

06236001

Responsible national committee

NA 062-07 FBR - Board of the Technical Department Nuclear technology and radiation protection 

Responsible european committee

CEN/TC 430 - Nuclear energy, nuclear technologies, and radiological protection 

Responsible international committee

ISO/TC 85/SC 5/WG 1 - Analytical methodology in the nuclear fuel cycle 

draft standard

Nuclear fuel technology - Guidelines for ceramographic preparation of UO₂ sintered pellets for microstructure examination (ISO 16793:2018); English version prEN ISO 16793:2020
2020-09
Order from Beuth Verlag

Contact

Dipl.-Ing.

Michaela Treige

Saatwinkler Damm 42/43
13627 Berlin

Tel.: +49 30 2601-2224
Fax: +49 30 2601-42224

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