Nuclear fuel technology — Controlled-potential coulometric measurement of plutonium

This document specifies an analytical method for the electrochemical measurement of pure plutonium nitrate solutions of nuclear grade, with an expanded uncertainty not exceeding ±0,2 % at the confidence level of 0,95 for a single determination (coverage factor, k = 2). The method is applicable for aqueous solutions containing plutonium at more than 0,5 g/l and test samples containing plutonium between 4 mg and 15 mg. Application of this technique to solutions containing plutonium at less than 0,5 g/l and test samples containing plutonium at less than 4 mg requires experimental demonstration by the user that applicable data quality objectives will be met.

Technologie du combustible nucléaire — Dosage du plutonium par coulométrie à potentiel imposé

L'ISO 12183:2016 décrit une méthode analytique pour le dosage électrochimique de plutonium pur dans des solutions nitriques de qualité nucléaire, avec une incertitude ne dépassant pas ± 0,2 % dans un intervalle de confiance de 0,95 pour une simple détermination (facteur d'élargissement, K = 2). La méthode est adaptée aux solutions aqueuses contenant plus de 0,5 g/L de plutonium et à des échantillons d'essai contenant entre 4 mg et 15 mg de plutonium. L'application de cette technique aux solutions contenant moins de 0,5 g/L et d'échantillons d'essai contenant moins de 4 mg de plutonium exige que l'utilisateur démontre expérimentalement que les objectifs relatifs à la qualité des données applicables soient atteints. Pour certaines applications, une purification des échantillons d'essai par échange anionique est nécessaire avant la mesure pour éliminer les substances interférentes présentes en quantités significatives. Se reporter à l'Article 10 qui traite des interférences et des actions correctives. La purification est aussi nécessaire dans les situations où la pureté de l'échantillon d'essai n'est pas connue ou quand elle peut fluctuer de façon imprévisible dans le procédé de fabrication. L'Article 11 traite des changements dans l'application de la méthode et de la méthodologie qui peuvent être appliquées et des considérations importantes pour sélectionner les paramètres de mesure, tout en restant à l'intérieur du domaine d'application du présent document.

General Information

Status
Published
Publication Date
06-May-2024
Current Stage
6060 - International Standard published
Start Date
07-May-2024
Due Date
10-Aug-2025
Completion Date
07-May-2024
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International
Standard
ISO 12183
Fourth edition
Nuclear fuel technology —
2024-05
Controlled-potential coulometric
measurement of plutonium
Technologie du combustible nucléaire — Dosage du plutonium
par coulométrie à potentiel imposé
Reference number
ISO 12183:2024(en) © ISO 2024

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ISO 12183:2024(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

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ISO 12183:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 2
7 Procedure . 8
7.1 Plutonium determination .8
7.2 Analysis of subsequent test samples . .14
8 Expression of quantity values . 14
8.1 Calculation of the electrical calibration factor .14
8.2 Calculation of the blank . 15
8.3 Fraction of electrolysed plutonium . 15
8.4 Plutonium, amount of substance and mass .16
8.5 Quality control .16
9 Characteristics of the method . 17
9.1 Repeatability .
...

International
Standard
ISO 12183
Fourth edition
Nuclear fuel technology —
2024-05
Controlled-potential coulometric
measurement of plutonium
Technologie du combustible nucléaire — Dosage du plutonium
par coulométrie à potentiel imposé
PROOF/ÉPREUVE
Reference number
ISO 12183:2024(en) © ISO 2024

---------------------- Page: 1 ----------------------
ISO 12183:2024(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 12183:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 2
7 Procedure . 8
7.1 Plutonium determination .8
7.2 Analysis of subsequent test samples . .14
8 Expression of quantity values . 14
8.1 Calculation of the electrical calibration factor .14
8.2 Calculation of the blank . 15
8.3 Fraction of electrolysed plutonium . 15
8.4 Plutonium, amount of substance and mass .16
8.5 Quality control .16
9 Characteristics of the method . 17
9.1 Repeatability .
...

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ISO/DISPRF 12183:2023(E2024(en)
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© ISO 2024
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All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication Formatted: HeaderCentered
may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
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or posting on the internet or an intranet, without prior written permission. Permission can be requested from either
distance from edge: 0.5 cm
ISO at the address below or ISO’s member body in the country of the requester.
Commented [eXtyles1]: The reference is to a withdrawn
standard which has been replaced
ISO copyright office

CP 401 • Ch. de Blandonnet 8
ISO 20344, Personal protective equipment — Test methods
CH-1214 Vernier, Geneva
for footwear
Phone: + 41 22 749 01 11
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