EN ISO 16793:2021

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

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.

Kernbrennstofftechnologie - Leitfaden für die keramographische Herstellung gesinterter UO2-Pellets zur Untersuchung des Feingefüges (ISO 16793:2018)

Technologie du combustible nucléaire - Lignes directrices pour la préparation céramographique de pastilles UO2 frittées pour l'examen de la microstructure (ISO 16793:2018)

Le présent document décrit la préparation céramographique de pastilles de dioxyde d'uranium (UO2) frittées, permettant de réaliser des examens qualitatifs et quantitatifs de leur microstructure.
Ces examens peuvent être réalisés avant et après une attaque chimique ou thermique.
Ils permettent
—          l'observation des fissures, des pores intergranulaires ou intragranulaires et des inclusions, et
—          le mesurage de la taille des grains et de la porosité, ainsi que de leur distribution.
Le mesurage de la taille moyenne des grains peut être effectué par une méthode courante de comptage décrite dans l'ISO 2624 ou l'ASTM E112[3], c'est-à-dire une méthode par interception, comparaison avec des grilles normalisées ou avec des images types.
Le mesurage de la distribution des tailles de pores est généralement effectué par un analyseur d'images automatique. Si la distribution granulométrique est également mesurée avec un analyseur d'images, il est recommandé d'utiliser une attaque thermique pour révéler de façon uniforme la structure des grains de l'ensemble de l'échantillon.

Tehnologija jedrskih goriv - Smernice za pripravo keramografske preiskave mikrostrukture za sintrane pelete UO2 (ISO 16793:2018)

General Information

• Status: Published
• Publication Date: 09-Feb-2021
• Withdrawal Date: 30-Aug-2021
• ICS: 27.120.30 - Fissile materials and nuclear fuel technology
• Technical Committee: CEN/TC 430 - Nuclear energy, nuclear technologies, and radiological protection
• Drafting Committee: CEN/TC 430 - Nuclear energy, nuclear technologies, and radiological protection
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 10-Feb-2021
• Due Date: 22-Sep-2022
• Completion Date: 10-Feb-2021
• Ref Project: SIST EN ISO 16793:2021 - Nuclear fuel technology - Guidelines for ceramographic preparation of UO2 sintered pellets for microstructure examination (ISO 16793:2018)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 16793:2021
01-april-2021
Tehnologija jedrskih goriv - Smernice za pripravo keramografske preiskave
mikrostrukture za sintrane pelete UO2 (ISO 16793:2018)
Nuclear fuel technology - Guidelines for ceramographic preparation of UO2 sintered
pellets for microstructure examination (ISO 16793:2018)
Technologie du combustible nucléaire - Lignes directrices pour la préparation
céramographique de pastilles UO2 frittées pour l'examen de la microstructure (ISO
16793:2018)
Ta slovenski standard je istoveten z: EN ISO 16793:2021
ICS:
27.120.30 Cepljivi materiali in jedrska Fissile materials and nuclear
gorivna tehnologija fuel technology
SIST EN ISO 16793:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 16793:2021


EN ISO 16793
EUROPEAN STANDARD

NORME EUROPÉENNE

February 2021
EUROPÄISCHE NORM
ICS 27.120.30
English Version

Nuclear fuel technology - Guidelines for ceramographic
preparation of UO2 sintered pellets for microstructure
examination (ISO 16793:2018)
Technologie du combustible nucléaire - Lignes
directrices pour la préparation céramographique de
pastilles UO2 frittées pour l'examen de la
microstructure (ISO 16793:2018)
This European Standard was approved by CEN on 18 January 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16793:2021 E
worldwide for CEN national Members.

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EN ISO 16793:2021 (E)
Contents Page
European foreword . 3

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SIST EN ISO 16793:2021
EN ISO 16793:2021 (E)
European foreword
The text of ISO 16793:2018 has been prepared by Technical Committee ISO/TC 85 "Nuclear energy,
nuclear technologies, and radiological protection” of the International Organization for Standardization
(ISO) and has been taken over as EN ISO 16793:2021 by Technical Committee CEN/TC 430 “Nuclear
energy, nuclear technologies, and radiological protection” the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2021, and conflicting national standards shall
be withdrawn at the latest by August 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 16793:2018 has been approved by CEN as EN ISO 16793:2021 without any modification.


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SIST EN ISO 16793:2021
INTERNATIONAL ISO
STANDA
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