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ISO 16795:2024

(Main)

Nuclear energy — Determination of Gd2O3 content in pellets containing uranium oxide by X-ray fluorescence spectrometry

Nuclear energy — Determination of Gd2O3 content in pellets containing uranium oxide by X-ray fluorescence spectrometry

This document specifies a method which covers the determination of Gd2O3 content in UO2 fuel pellets, by X-ray fluorescence spectrometry. Either wave dispersion X-ray fluorescence (WD-XRF) or energy dispersion X-ray fluorescence (ED-XRF) is applicable, however, this document states a method by using WD-XRF using Gd Lα-line. This method has been tested for mass fractions of from 2 % to 10 % Gd2O3.

Énergie nucléaire — Détermination de la teneur de Gd2O3 par spectrométrie à fluorescence X dans des pastilles combustibles contenant de l'oxyde d'uranium

L'ISO 16795:2004 spécifie une méthode applicable pour le dosage de Gd2O3 dans des pastilles frittées par spectrométrie de fluorescence X utilisant la raie Gd L-alpha. Les pastilles de combustible sont polies avant l'exposition aux rayons X. Cette méthode a été testée pour des fractions massiques en Gd2O3 allant de 2 % à 10 %.

General Information

Status
Published
Publication Date
21-Apr-2024
ICS
27.120.30 - Fissile materials and nuclear fuel technology
Technical Committee
ISO/TC 85/SC 5 - Nuclear installations, processes and technologies
Drafting Committee
ISO/TC 85/SC 5 - Nuclear installations, processes and technologies
Current Stage
6060 - International Standard published
Start Date
22-Apr-2024
Due Date
21-Jun-2024
Completion Date
22-Apr-2024
Ref Project

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Revises
ISO 16795:2004 - Nuclear energy — Determination of Gd2O3 content of gadolinium fuel pellets by X-ray fluorescence spectrometry
Effective Date
25-Jun-2022

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ISO 16795:2024 - Nuclear energy — Determination of Gd2O3 content in pellets containing uranium oxide by X-ray fluorescence spectrometry Released:22. 04. 2024ISO 16795:2024 - Nuclear energy — Determination of Gd2O3 content in pellets containing uranium oxide by X-ray fluorescence spectrometry Released:22. 04. 2024
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ISO 16795:2024 - Nuclear energy — Determination of Gd2O3 content in pellets containing uranium oxide by X-ray fluorescence spectrometry Released:22. 04. 2024
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ISO/PRF 16795 - Nuclear energy — Determination of Gd2O3 content in pellets containing uranium oxide by X-ray fluorescence spectrometry Released:5. 03. 2024ISO/PRF 16795 - Nuclear energy — Determination of Gd2O3 content in pellets containing uranium oxide by X-ray fluorescence spectrometry Released:5. 03. 2024
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ISO/PRF 16795 - Nuclear energy — Determination of Gd2O3 content in pellets containing uranium oxide by X-ray fluorescence spectrometry Released:5. 03. 2024
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REDLINE ISO/PRF 16795 - Nuclear energy — Determination of Gd2O3 content in pellets containing uranium oxide by X-ray fluorescence spectrometry Released:5. 03. 2024REDLINE ISO/PRF 16795 - Nuclear energy — Determination of Gd2O3 content in pellets containing uranium oxide by X-ray fluorescence spectrometry Released:5. 03. 2024
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REDLINE ISO/PRF 16795 - Nuclear energy — Determination of Gd2O3 content in pellets containing uranium oxide by X-ray fluorescence spectrometry Released:5. 03. 2024
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Standards Content (Sample)

International
Standard
ISO 16795
Second edition
Nuclear energy — Determination
2024-04
of Gd O content in pellets
2 3
containing uranium oxide by X-ray
fluorescence spectrometry
Énergie nucléaire — Détermination de la teneur de Gd O par
2 3
spectrométrie à fluorescence X dans des pastilles combustibles
contenant de l'oxyde d'uranium
Reference number
ISO 16795:2024(en) © ISO 2024

---------------------- Page: 1 ----------------------
ISO 16795:2024(en)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2024
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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland

© ISO 2024 – All rights reserved
ii

---------------------- Page: 2 ----------------------
ISO 16795:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Reagents . 2
7 Preparation of standards . 2
8 Polishing . 3
9 Equipment calibration . 3
9.1 Angle calibration.3
9.2 Pulse-height distribution .3
9.3 Background correction .3
9.4 Stability (sensitivity) check .3
10 Calibration curve . 4
11 Measurements . 4
12 Precision and accuracy .
...

International
Standard
ISO 16795
Second edition
Nuclear Energy — Determination
of Gd O content in pellets
2 3
containing uranium oxide by X-ray
fluorescence spectrometry
Énergie nucléaire — Détermination de la teneur de Gd O par
2 3
spectrométrie à fluorescence X dans des pastilles combustibles
contenant de l'oxyde d'uranium
PROOF/ÉPREUVE
Reference number
ISO 16795:2024(en) © ISO 2024

---------------------- Page: 1 ----------------------
ISO 16795:2024(en)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2024
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
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE
© ISO 2024 – All rights reserved
ii

---------------------- Page: 2 ----------------------
ISO 16795:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Reagents . 2
7 Preparation of standards . 2
8 Polishing . 3
9 Equipment calibration . 3
9.1 Angle calibration.3
9.2 Pulse-height distribution .3
9.3 Background correction .3
9.4 Stability (sensitivity) check .3
10 Calibration curve . 4
11 Measurements . 4
12 Precision and accuracy .
...

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ISO/PRF 16795:2024(en)
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ISO/TC 85/SC 5 .
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Nuclear energyEnergy — Determination of Gd O content in pellets
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containing uranium oxide by X-ray fluorescence spectrometry
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pastilles combustibles contenant de l'oxyde d'uranium
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ISO/DISPRF 16795:2023(E2024(en) Formatted: Font: 11 pt, Bold
Formatted: Font: 11 pt, Bold
Formatted: Font: 11 pt, Bold
© ISO 2024
Formatted: HeaderCentered, Space After: 0 pt, Line
spacing: single
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, Formatted: Right: 1.5 cm, Bottom: 1 cm, Gutter: 0 cm,
Header distance from edge: 1.27 cm, Footer distance
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
from edge: 0.5 cm
at the address below or ISO’s member body in the country of the requester.
Commented [eXtyles1]: The reference "ISO 2024" is to a
ISO copyright office
withdrawn standard
CP 401 • Ch. de Blandonnet 8
Formatted: Default Paragraph Font
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Formatted: Default Paragraph Font
EmailE-mail: copyright@iso.org
Formatted: Indent: Left: 0 cm, Right: 0 cm, Space
Website: www.iso.orgwww.iso.org
Before: 0 pt, No page break before, Adjust space
between Latin and Asian text, Adjust space between
Published in Switzerland
Asian text and numbers
Formatted: French (France)
Formatted: French (France)
Formatted: French (France)
Formatted: Font: 10 pt
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Formatted: Font: 11 pt
Formatted: FooterPageRomanNumber, Space After: 0
pt, Line spacing: single
ii © ISO 2023 2024 – All rights reserved

ii

---------------------- Page: 2 ----------------------
ISO/PRF 16795:2024(en)
Formatted: Font: 11 pt, Bold
Formatted: Font: 11 pt, Bold
Formatted: HeaderCentered, Left, Space After: 0 pt,
Contents
Line spacing: single
Formatted: Adjust space between Latin and Asian text,
Foreword . v
Adjust space between Asian text and numbers
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Reagents . 2
7 Preparation of standards . 2
8 Polishing .
...

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