EN ISO 21484:2019
(Main)Nuclear Energy - Fuel technology - Determination of the O/M ratio in MOX pellets by the gravimetric method (ISO 21484:2017)
Nuclear Energy - Fuel technology - Determination of the O/M ratio in MOX pellets by the gravimetric method (ISO 21484:2017)
ISO 21484:2017 describes a method for determining the Oxygen-to-Metal (O/M) ratio in mixed uranium-plutonium oxide (U,Pu)O2 ± X pellets. The parameters given in the following paragraphs are relevant for pellets within a range of O/M ratio corresponding to 1,98 to 2,01. The method described in the document is adapted, with regard to the parameters, if the expected values of O/M ratio are outside the range.
Kernenergie - Brennstofftechnologie - Bestimmung des O/M-Verhältnisses in MOX-Pellets mit dem gravimetrischen Verfahren (ISO 21484:2017)
Dieses Dokument beschreibt ein Verfahren zur Bestimmung des Verhältnisses von Sauerstoff zu Metall (O/M) (en: Oxygen-to-Metal) in Pellets aus Uran-Plutonium-Mischoxiden (U,Pu)O2 ± X. Die in den folgenden Abschnitten angegebenen Parameter sind für Pellets mit einem O/M Verhältnis in einem Bereich von 1,98 bis 2,01 relevant. Das in diesem Dokument beschriebene Verfahren wird hinsichtlich der Parameter angepasst, wenn die erwarteten Werte des O/M Verhältnisses außerhalb dieses Bereichs liegen.
Énergie nucléaire - Technologie du combustible - Détermination du rapport O/M dans les pastilles MOX par la méthode gravimétrique (ISO 21484:2017)
L'ISO 21484:2017 décrit une méthode de détermination du rapport oxygène/métal (O/M) dans les pastilles de mélange d'oxydes d'uranium et de plutonium (U,Pu)O2 ± X. Les paramètres indiqués dans les paragraphes suivants sont applicables aux pastilles dont le rapport O/M est compris entre 1,98 et 2,01. La méthode décrite dans le présent document doit être adaptée, en ce qui concerne les paramètres, si les valeurs attendues du rapport O/M ne sont pas situées dans cette plage.
Jedrska energija - Tehnologija goriv - Ugotavljanje razmerja O/M v peletih MOX z gravimetrično metodo (ISO 21484:2017)
Metoda za ugotavljanje razmerja med kisikom in kovino O/M v peletih z mešanico uranovega in plutonijevega oksida (MOX) (U,Pu)O2 ± X. Parametri, ki so podani v spodnjih odstavkih, se navezujejo na pelete znotraj območja razmerja O/M 1,98 : 2,01. Metoda, ki je opisana v dokumentu, je prikrojena v skladu s parametri, če so pričakovane vrednosti razmerja O/M zunaj tega območja.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2019
Jedrska energija - Tehnologija goriv - Ugotavljanje razmerja O/M v peletih MOX z
gravimetrično metodo (ISO 21484:2017)
Nuclear Energy - Fuel technology - Determination of the O/M ratio in MOX pellets by the
gravimetric method (ISO 21484:2017)
Kernenergie - Brennstofftechnologie - Bestimmung des O/M-Verhältnisses in MOX-
Pellets mit dem gravimetrischen Verfahren (ISO 21484:2017)
Énergie nucléaire - Technologie du combustible - Détermination du rapport O/M dans les
pastilles MOX par la méthode gravimétrique (ISO 21484:2017)
Ta slovenski standard je istoveten z: EN ISO 21484:2019
ICS:
17.240 Merjenje sevanja Radiation measurements
27.120.30 Cepljivi materiali in jedrska Fissile materials and nuclear
gorivna tehnologija fuel technology
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 21484
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2019
EUROPÄISCHE NORM
ICS 17.240; 27.120.30
English Version
Nuclear Energy - Fuel technology - Determination of the
O/M ratio in MOX pellets by the gravimetric method (ISO
21484:2017)
Énergie nucléaire - Technologie du combustible - Kernenergie - Brennstofftechnologie - Bestimmung des
Détermination du rapport O/M dans les pastilles MOX O/M-Verhältnisses in MOX-Pellets mit dem
par la méthode gravimétrique (ISO 21484:2017) gravimetrischen Verfahren (ISO 21484:2017)
This European Standard was approved by CEN on 8 March 2019.
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.
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EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21484:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 21484:2017 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 21484:2019 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 December 2019, and conflicting national standards
shall be withdrawn at the latest by December 2019.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 21484:2017 has been approved by CEN as EN ISO 21484:2019 without any modification.
INTERNATIONAL ISO
STANDARD 21484
Second edition
2017-01
Nuclear Energy — Fuel technology —
Determination of the O/M ratio in MOX
pellets by the gravimetric method
Énergie nucléaire — Technologie du combustible — Détermination
du rapport O/M dans les pastilles MOX par la méthode gravimétrique
Reference number
ISO 21484:2017(E)
©
ISO 2017
ISO 21484:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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ii © ISO 2017 – All rights reserved
ISO 21484:2017(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reactions . 1
6 Reagents and materials . 1
7 Apparatus . 2
8 Sampling . 2
9 Procedure. 2
9.1 Preliminary test . 2
9.2 Preparing the crucibles . . 2
9.3 Weighing the sample . 2
9.4 Heat treatment cycles . 3
9.4.1 General. 3
9.4.2 Example 1 . 3
9.4.3 Example 2 . 3
9.5 Final weighing . 3
10 Calculation . 4
10.1 Mean atomic mass of oxide after heat treatment . 4
10.2 Calculation of O/M ratio. 4
11 Precision . 4
11.1 Accuracy . 4
11.2 Precision . 5
11.3 Sensitivity . 5
12 Test report . 5
Bibliography . 6
ISO 21484:2017(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
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This document was prepared by Technical Committee ISO/TC 85, Nuclear energy, nuclear technologies,
and radiological protection, Subcommittee SC 5, Nuclear installations, processes and technologies.
This second edition cancels and replaces the first edition (ISO 21484:2008), which has been technically
revised.
iv © ISO 2017 – All rights reserved
INTERNATIONAL STANDARD ISO 21484:2017(E)
Nuclear Energy — Fuel technology — Determination of the
O/M ratio in MOX pellets by the gravimetric method
1 Scope
This document describes a method for determining the Oxygen-to-Metal (O/M) ratio in mixed uranium-
plutonium oxide (U,Pu)O pellets. The parameters given in the following paragraph
...
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