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

Status
Published
Publication Date
11-Jun-2019
Withdrawal Date
30-Dec-2019
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
12-Jun-2019
Due Date
28-Nov-2020
Completion Date
12-Jun-2019

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SLOVENSKI STANDARD
SIST EN ISO 21484:2019
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
SIST EN ISO 21484:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 21484:2019

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SIST EN ISO 21484:2019


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.

CEN members are the national standards bodies of 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 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
© 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.

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SIST EN ISO 21484:2019
EN ISO 21484:2019 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 21484:2019
EN ISO 21484:2019 (E)
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.


3

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SIST EN ISO 21484:2019

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SIST EN ISO 21484:2019
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

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SIST EN ISO 21484:2019
ISO 21484:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© 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
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

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SIST EN ISO 21484:2019
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 .
...

SLOVENSKI STANDARD
oSIST prEN ISO 21484:2019
01-januar-2019
-HGUVNDHQHUJLMD7HKQRORJLMDJRULY8JRWDYOMDQMHUD]PHUMD20YSHOHWLK02;]
JUDYLPHWULþQRPHWRGR ,62
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: prEN ISO 21484
ICS:
17.240 Merjenje sevanja Radiation measurements
27.120.30 Cepljivi materiali in jedrska Fissile materials and nuclear
gorivna tehnologija fuel technology
oSIST prEN ISO 21484:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 21484:2019

---------------------- Page: 2 ----------------------
oSIST prEN ISO 21484:2019
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

---------------------- Page: 3 ----------------------
oSIST prEN ISO 21484:2019
ISO 21484:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© 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
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 21484:2019
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 2017 – All rights reserved iii

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oSIST prEN ISO 21484:2019
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
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction a
...

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