Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 2: Dissolution of MOX pellets and powders (ISO 18256-2:2019)

This document specifies the dissolution of samples consisting of MOX pellets or powders to provide suitable aliquots for subsequent analysis of elemental concentration and isotopic composition.

Kernbrennstofftechnologie - Lösung von plutoniumdioxidhaltigen Werkstoffen - Teil 2: Lösung von MOX-Pellets und MOX-Pulvern (ISO 18256-2:2019)

Technologie du combustible nucléaire - Dissolution des matériaux contenant du dioxyde de plutonium - Partie 2: Dissolution de pastilles et poudres de MOX (ou mélanges d'oxydes) (ISO 18256-2:2019)

Le présent document spécifie un mode opératoire pour la dissolution d'échantillons composés de pastilles ou poudres de MOX (mélange d'oxydes) pour fournir des solutions appropriées afin de permettre l'analyse ultérieure de la concentration des éléments et de la composition isotopique.

Tehnologija jedrskih goriv - Raztapljanje materialov, ki vsebujejo plutonijev dioksid - 2. del: Raztapljanje peletov in praškov MOX (ISO 18256-2:2019)

General Information

Status
Published
Public Enquiry End Date
30-Nov-2020
Publication Date
21-Feb-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
18-Feb-2021
Due Date
25-Apr-2021
Completion Date
22-Feb-2021

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SLOVENSKI STANDARD
SIST EN ISO 18256-2:2021
01-april-2021

Tehnologija jedrskih goriv - Raztapljanje materialov, ki vsebujejo plutonijev dioksid

- 2. del: Raztapljanje peletov in praškov MOX (ISO 18256-2:2019)

Nuclear fuel technology - Dissolution of plutonium dioxide-containing materials - Part 2:

Dissolution of MOX pellets and powders (ISO 18256-2:2019)

Technologie du combustible nucléaire - Dissolution des matériaux contenant du dioxyde

de plutonium - Partie 2: Dissolution de pastilles et poudres de MOX (ou mélanges
d'oxydes) (ISO 18256-2:2019)
Ta slovenski standard je istoveten z: EN ISO 18256-2:2021
ICS:
27.120.30 Cepljivi materiali in jedrska Fissile materials and nuclear
gorivna tehnologija fuel technology
SIST EN ISO 18256-2:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 18256-2:2021
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SIST EN ISO 18256-2:2021
EN ISO 18256-2
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2021
EUROPÄISCHE NORM
ICS 27.120.30
English Version
Nuclear fuel technology - Dissolution of plutonium
dioxide-containing materials - Part 2: Dissolution of MOX
pellets and powders (ISO 18256-2:2019)
Technologie du combustible nucléaire - Dissolution des
matériaux contenant du dioxyde de plutonium - Partie
2: Dissolution de pastilles et poudres de MOX (ou
mélanges d'oxydes) (ISO 18256-2:2019)
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 18256-2:2021 E

worldwide for CEN national Members.
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SIST EN ISO 18256-2:2021
EN ISO 18256-2:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 18256-2:2021
EN ISO 18256-2:2021 (E)
European foreword

The text of ISO 18256-2:2019 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 18256-2:2021 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 18256-2:2019 has been approved by CEN as EN ISO 18256-2:2021 without any

modification.
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SIST EN ISO 18256-2:2021
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SIST EN ISO 18256-2:2021
INTERNATIONAL ISO
STANDARD 18256-2
First edition
2019-01
Nuclear fuel technology — Dissolution
of plutonium dioxide-containing
materials —
Part 2:
Dissolution of MOX pellets and
powders
Technologie du combustible nucléaire — Dissolution des matériaux
contenant du dioxyde de plutonium —
Partie 2: Dissolution de pastilles et poudres de MOX (ou mélanges
d'oxydes)
Reference number
ISO 18256-2:2019(E)
ISO 2019
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SIST EN ISO 18256-2:2021
ISO 18256-2:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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SIST EN ISO 18256-2:2021
ISO 18256-2:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Summary of the method ............................................................................................................................................................................... 1

5 Apparatus and reagents ................................................................................................................................................................................ 2

5.1 Apparatus .................................................................................................................................................................................................... 2

5.2 Reagents........................................................................................................................................................................................................ 2

6 Sample dissolution ............................................................................................................................................................................................. 3

6.1 Procedure for common plutonium containing materials ................................................................................... 3

6.2 Solution adjustment (optional) ................................................................................................................................................ 5

7 Quality control ........................................................................................................................................................................................................ 6

Bibliography ................................................................................................................................................................................................................................ 7

© ISO 2019 – All rights reserved iii
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SIST EN ISO 18256-2:2021
ISO 18256-2:2019(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 and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso

.org/iso/foreword .html.

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.

A list of all the parts in the ISO 18256 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
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SIST EN ISO 18256-2:2021
ISO 18256-2:2019(E)
Introduction

This document describes a method to dissolve samples consisting of MOX pellets or powders to provide

suitable aliquots for subsequent analysis of elemental concentration and isotopic composition.

© ISO 2019 – All rights reserved v
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SIST EN ISO 18256-2:2021
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SIST EN ISO 18256-2:2021
INTERNATIONAL STANDARD ISO 18256-2:2019(E)
Nuclear fuel technology — Dissolution of plutonium
dioxide-containing materials —
Part 2:
Dissolution of MOX pellets and powders
1 Scope

This document specifies the dissolution of samples consisting of MOX pellets or powders to provide

suitable aliquots for subsequent analysis of elemental concentration and isotopic composition.

2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Summary of the method

Among the factors affecting the formation of solid solution and hence, the ease of dissolution are:

— the method of fuel fabrication (i.e. mechanically blended oxides, co-precipitated oxides, microwave

denitrated oxides or sol-gel oxides);
— the degree of sintering.

Therefore, different dissolution methods are applied depending on the type of MOX sample to be

dissolved.
The radiological hazard of plutonium and the need
...

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