Nuclear fuel technology - Guidelines on the measurement of the specific surface area of uranium oxide powders by the BET method (ISO 12800:2017)

ISO 12800:2017 gives guidelines on the determination of the specific surface area of as-fabricated uranium dioxide powder by volumetric or gravimetric determination of the amount of nitrogen adsorbed on the powder, and can be applied to other similar materials, e.g. U3O8, UO2-PuO2 powders, and other bodies with similar surface areas, e.g. powder granules or green pellets, provided that the conditions described are fulfilled. Modifications using other adsorbing gases are included.
The method is relevant as long as the expected value is in the range between 1 m2/g and 10 m2/g.

Kernbrennstofftechnologie - Leitlinien für die Messung des spezifischen Oberflächenbereiches von Uranoxid-Pulvern mittels der BET-Methode (ISO 12800:2017)

Dieses Dokument gibt Leitlinien für die Bestimmung der spezifischen Oberfläche von Urandioxid im Her-stellungszustand durch volumetrische oder gravimetrische Bestimmung der auf dem Pulver adsorbierten Stickstoffmenge, und es kann auf ähnliche Materialien wie z. B. U3O8 , UO2 PuO2 Pulver und andere Körper mit ähnlichen Oberflächen, z. B. Pulvergranulate oder Rohpellets, angewandt werden, vorausgesetzt, dass die beschriebenen Bedingungen erfüllt sind. Änderungen unter Verwendung anderer adsorbierender Gase sind enthalten.
Das Verfahren ist relevant, solange der Erwartungswert im Bereich zwischen 1 m2/g und 10 m2/g liegt.

Technologie du combustible nucléaire - Lignes directrices pour le mesurage de l'aire massique (surface spécifique) des poudres d'oxyde d'uranium par la méthode BET (ISO 12800:2017)

Tehnologija jedrskih goriv - Smernice za merjenje specifične površine prahu uranovega oksida po metodi BET (ISO 12800:2017)

Standard ISO 12800:2017 podaja smernice za določanje specifične površine izdelanega prahu uranovega dioksida z volumetričnim ali gravimetričnim določanjem količine adsorbiranega dušika na prahu. Standard lahko uporabimo tudi pri drugih podobnih materialih, npr. pri prahovih U3O8, UO2-PuO2 in drugih telesih s podobno površino, npr. granule prahu ali zeleni peleti, dokler so izpolnjeni opisani pogoji. Vključene so modifikacije, pri katerih se uporabljajo drugi adsorbirani plini.
Metoda je primerna, če je pričakovana vrednost od 1 m2/g do 10 m2/g.

General Information

Status
Published
Public Enquiry End Date
31-Jan-2019
Publication Date
02-Jul-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
20-Jun-2019
Due Date
25-Aug-2019
Completion Date
03-Jul-2019

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SLOVENSKI STANDARD
SIST EN ISO 12800:2019
01-september-2019
Tehnologija jedrskih goriv - Smernice za merjenje specifične površine prahu
uranovega oksida po metodi BET (ISO 12800:2017)

Nuclear fuel technology - Guidelines on the measurement of the specific surface area of

uranium oxide powders by the BET method (ISO 12800:2017)
Kernbrennstofftechnologie - Leitlinien für die Messung des spezifischen

Oberflächenbereiches von Uranoxid-Pulvern mittels der BET-Methode (ISO 12800:2017)

Technologie du combustible nucléaire - Lignes directrices pour le mesurage de l'aire

massique (surface spécifique) des poudres d'oxyde d'uranium par la méthode BET (ISO

12800:2017)
Ta slovenski standard je istoveten z: EN ISO 12800:2019
ICS:
27.120.30 Cepljivi materiali in jedrska Fissile materials and nuclear
gorivna tehnologija fuel technology
SIST EN ISO 12800:2019 en,fr,de

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

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SIST EN ISO 12800:2019
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SIST EN ISO 12800:2019
EN ISO 12800
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2019
EUROPÄISCHE NORM
ICS 27.120.30
English Version
Nuclear fuel technology - Guidelines on the measurement
of the specific surface area of uranium oxide powders by
the BET method (ISO 12800:2017)

Technologie du combustible nucléaire - Lignes Kernbrennstofftechnologie - Leitlinien für die Messung

directrices pour le mesurage de l'aire massique des spezifischen Oberflächenbereiches von Uranoxid-

(surface spécifique) des poudres d'oxyde d'uranium Pulvern mittels der BET-Methode (ISO 12800:2017)

par la méthode BET (ISO 12800:2017)
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 12800:2019 E

worldwide for CEN national Members.
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SIST EN ISO 12800:2019
EN ISO 12800:2019 (E)
Contents Page

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

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SIST EN ISO 12800:2019
EN ISO 12800:2019 (E)
European foreword

The text of ISO 12800:2017 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 12800:2019 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 12800:2017 has been approved by CEN as EN ISO 12800:2019 without any modification.

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SIST EN ISO 12800:2019
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SIST EN ISO 12800:2019
INTERNATIONAL ISO
STANDARD 12800
Second edition
2017-06
Nuclear fuel technology — Guidelines
on the measurement of the specific
surface area of uranium oxide
powders by the BET method
Technologie du combustible nucléaire — Lignes directrices pour le
mesurage de l’aire massique (surface spécifique) des poudres d’oxyde
d’uranium par la méthode BET
Reference number
ISO 12800:2017(E)
ISO 2017
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SIST EN ISO 12800:2019
ISO 12800:2017(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 12800:2019
ISO 12800:2017(E)
Contents Page

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

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

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

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

4 Principle ........................................................................................................................................................................................................................ 1

4.1 Summary of the BET method ..................................................................................................................................................... 1

4.2 Isothermal adsorption curves .................................................................................................................................................... 1

4.3 Conditions and assumptions ....................................................................................................................................................... 2

5 Procedure..................................................................................................................................................................................................................... 3

5.1 Sample preparation ............................................................................................................................................................................ 3

5.2 Volumetric measurement .............................................................................................................................................................. 3

5.3 Gravimetric measurement ............................................................................................................................................................ 3

5.4 Original and single-point methods ........................................................................................................................................ 3

5.5 Dynamic method (carrier gas method) ............................................................................................................................. 4

5.6 Alternative methods ........................................................................................................................................................................... 4

6 Expression of results ........................................................................................................................................................................................ 4

6.1 Methods of calculation ..................................................................................................................................................................... 4

6.1.1 Multipoint determination ........................................................................................................................................ 4

6.1.2 Single-point determination .................................................................................................................................... 7

6.2 Precision and accuracy..................................................................................................................................................................... 7

7 Test report ................................................................................................................................................................................................................... 7

Bibliography ................................................................................................................................................................................................................................ 8

© ISO 2017 – All rights reserved iii
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SIST EN ISO 12800:2019
ISO 12800:2017(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

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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

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

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URL: w w w . i s o .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 12800:2003), which has been technically

revised.
iv © ISO 2017 – All rights reserved
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