SIST EN ISO 9161:2021

Uranium dioxide powder - Determination of apparent density and tap density (ISO 9161:2019)

This document specifies a method of determining the apparent density and tap density of free-flowing uranium dioxide (UO2) powder which will be used for pelleting and sintering of UO2 pellets as a nuclear fuel.
This method can be used for different UO2 powder types including grains, granules, spheres or other kinds of particles. The method can also be applied to other fuel powders as PuO2, ThO2 and powder mixtures as UO2-PuO2 and UO2-Gd2O3.
This document is based on the principle of using a flowmeter funnel (see 4.1). Other measurement apparatus, such as a Scott volumeter, can also be used.

Urandioxidpulver - Ermittlung der Rohdichte und der Klopfdichte (ISO 9161:2019)

Poudre de dioxyde d'uranium - Détermination de la masse volumique apparente et de la masse volumique après tassement (ISO 9161:2019)

Le présent document spécifie une méthode permettant de déterminer la masse volumique apparente et la masse volumique après tassement de la poudre de dioxyde d'uranium (UO2) à écoulement libre, poudre destinée à constituer du combustible nucléaire après agglomération en pastilles de UO2 et frittage.
Cette méthode s'applique aux diverses poudres de UO2 constituées de grains, de granules, de billes ou d'autres types de particules. Elle s'applique également à d'autres poudres de combustible telles que PuO2, ThO2 et des mélanges de poudre tels que UO2-PuO2 et UO2-Gd2O3.
Le présent document est basé sur le principe d'utilisation d'un cône d'écoulement (voir 4.1). D'autres appareillages de mesure, tels que le volumètre de Scott, peuvent également être utilisés.

Uranov dioksid v prahu - Ugotavljanje navidezne gostote in gostote po stiskanju (s potresanjem) (ISO 9161:2019)

General Information

• Status: Published
• Public Enquiry End Date: 30-Nov-2020
• Publication Date: 21-Feb-2021
• ICS: 27.120.30 - Fissile materials and nuclear fuel technology
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 18-Feb-2021
• Due Date: 25-Apr-2021
• Completion Date: 22-Feb-2021
• Ref Project: EN ISO 9161:2021 - Uranium dioxide powder - Determination of apparent density and tap density (ISO 9161:2019)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 9161:2021
01-april-2021
Uranov dioksid v prahu - Ugotavljanje navidezne gostote in gostote po stiskanju (s
potresanjem) (ISO 9161:2019)
Uranium dioxide powder - Determination of apparent density and tap density (ISO
9161:2019)
Poudre de dioxyde d'uranium - Détermination de la masse volumique apparente et de la
masse volumique après tassement (ISO 9161:2019)
Ta slovenski standard je istoveten z: EN ISO 9161:2021
ICS:
27.120.30 Cepljivi materiali in jedrska Fissile materials and nuclear
gorivna tehnologija fuel technology
SIST EN ISO 9161:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 9161:2021

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SIST EN ISO 9161:2021


EN ISO 9161
EUROPEAN STANDARD

NORME EUROPÉENNE

February 2021
EUROPÄISCHE NORM
ICS 27.120.30
English Version

Uranium dioxide powder - Determination of apparent
density and tap density (ISO 9161:2019)
Poudre de dioxyde d'uranium - Détermination de la
masse volumique apparente et de la masse volumique
après tassement (ISO 9161:2019)
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 9161:2021 E
worldwide for CEN national Members.

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SIST EN ISO 9161:2021
EN ISO 9161:2021 (E)
Contents Page
European foreword . 3

2

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SIST EN ISO 9161:2021
EN ISO 9161:2021 (E)
European foreword
The text of ISO 9161:2019 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 9161:2021 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 9161:2019 has been approved by CEN as EN ISO 9161:2021 without any modification.

3

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SIST EN ISO 9161:2021

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SIST EN ISO 9161:2021
INTERNATIONAL ISO
STANDARD 9161
Second edition
2019-02
Uranium dioxide powder —
Determination of apparent density
and tap density
Poudre de dioxyde d'uranium — Détermination de la masse
volumique apparente et de la masse volumique après tassement
Reference number
ISO 9161:2019(E)
©
ISO 2019

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SIST EN ISO 9161:2021
ISO 9161:2019(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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

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SIST EN ISO 9161:2021
ISO 9161:2019(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
4.1 Apparent density . 1
4.2 Tap density . 1
5 Apparatus . 2
6 Sampling and samples . 3
7 Procedure. 3
7.1 Safety precautions . 3
7.2 Calibration . 4
7.3 Determination of the apparent density . 4
7.4 Determination of tapped density . 4
7.5 Number of determinations . 4
7.6 Quality control . 5
8 Expression of results . 5
8.1 Method of calculation . 5
8.2 Precision . 5
9 Test report . 5
Bibliography . 7
© ISO 2019 – All rights reserved iii

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SIST EN ISO 9161:2021
ISO 9161:2019(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 .is
...

SLOVENSKI STANDARD
oSIST prEN ISO 9161:2020
01-november-2020
Uranov dioksid v prahu - Ugotavljanje navidezne gostote in gostote po stiskanju (s
potresanjem) (ISO 9161:2019)
Uranium dioxide powder - Determination of apparent density and tap density (ISO
9161:2019)
Poudre de dioxyde d'uranium - Détermination de la masse volumique apparente et de la
masse volumique après tassement (ISO 9161:2019)
Ta slovenski standard je istoveten z: prEN ISO 9161
ICS:
27.120.30 Cepljivi materiali in jedrska Fissile materials and nuclear
gorivna tehnologija fuel technology
oSIST prEN ISO 9161:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 9161:2020

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oSIST prEN ISO 9161:2020
INTERNATIONAL ISO
STANDARD 9161
Second edition
2019-02
Uranium dioxide powder —
Determination of apparent density
and tap density
Poudre de dioxyde d'uranium — Détermination de la masse
volumique apparente et de la masse volumique après tassement
Reference number
ISO 9161:2019(E)
©
ISO 2019

---------------------- Page: 3 ----------------------
oSIST prEN ISO 9161:2020
ISO 9161:2019(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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 9161:2020
ISO 9161:2019(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
4.1 Apparent density . 1
4.2 Tap density . 1
5 Apparatus . 2
6 Sampling and samples . 3
7 Procedure. 3
7.1 Safety precautions . 3
7.2 Calibration . 4
7.3 Determination of the apparent density . 4
7.4 Determination of tapped density . 4
7.5 Number of determinations . 4
7.6 Quality control . 5
8 Expression of results . 5
8.1 Method of calculation . 5
8.2 Precision . 5
9 Test report . 5
Bibliography . 7
© ISO 2019 – All rights reserved iii

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oSIST prEN ISO 9161:2020
ISO 9161:2019(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.
This second edition cancels and replaces the first edition (ISO 9161:2004), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— an introduction has been added;
— definitions in Clause 3 have been updated;
— safety precautions have been updated.
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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oSIST prEN ISO 9161:2020
ISO 9161:2019(E)

Introduction
Uranium dioxide (UO ) powder is the source material for the manufacture of nuclear fuel as pellets,
2
and is produced for use in nuclear reactors by a variety of processes. Specifications for UO powder
2
[5]
used in the production of sintered pellets as a nuclear fuel are given in standards such as ASTM C753
or specifications supplied by the user. These specifications can include requirements for apparent (or
bulk) density, tap density, or both.
This document specifies a method for determination of the apparent density and tap density of free-
flowing UO powder, and can be used for a variety of powder types. The method can also be applied to
2
o
...