EN ISO 12183:2019
(Main)Nuclear fuel technology - Controlled-potential coulometric assay of plutonium (ISO 12183:2016)
Nuclear fuel technology - Controlled-potential coulometric assay of plutonium (ISO 12183:2016)
ISO 12183:2016 describes an analytical method for the electrochemical assay of pure plutonium nitrate solutions of nuclear grade, with a total uncertainty not exceeding ±0,2 % at the confidence level of 0,95 for a single determination (coverage factor, K = 2). The method is suitable for aqueous solutions containing more than 0,5 g/L plutonium and test samples containing between 4 mg and 15 mg of plutonium. Application of this technique to solutions containing less than 0,5 g/L and test samples containing less than 4 mg of plutonium requires experimental demonstration by the user that applicable data quality objectives will be met.
For some applications, purification of test samples by anion exchange is required before measurement to remove interfering substances when present in significant amounts.
Kernbrennstofftechnologie - Coulometrische Bestimmung von Plutonium mit kontrolliertem Potential (ISO 12183:2016)
In diesem Dokument wird das Analyseverfahren für die elektrochemische Prüfung von reinen Plutoniumnitrat-Lösungen nuklearer Qualität beschrieben, deren Gesamtunsicherheit ±0,2 % bei einem Vertrauensniveau von 0,95 bei einer Einzelbestimmung (Erweiterungsfaktor, K = 2) nicht übersteigt. Das Verfahren eignet sich für wässrige Lösungen, die mehr als 0,5 g/l Plutonium sowie Prüfproben, die zwischen 4 mg und 15 mg Plutonium enthalten. Die Anwendung dieses Verfahrens für Lösungen, die weniger als 0,5 g/l Plutonium und Prüfproben, die weniger als 4 mg Plutonium enthalten, erfordert einen experimentellen Nachweis durch den Anwender, dass die vorgeschriebenen Datenqualitätsziele erreicht werden.
Bei manchen Anwendungen ist vor der Messung eine Reinigung der Prüfproben durch Anionenaustausch erforderlich, um Störsubstanzen zu entfernen, wenn diese in erheblichen Mengen vorhanden sind. Siehe Abschnitt 10 bezüglich der Erläuterung von Störungen und entsprechende Korrekturmaßnahmen. Eine Reinigung ist auch dann erforderlich, wenn die Reinheit der Prüfprobe unbekannt ist oder wenn sie während des Herstellungsprozesses unvorhersehbar schwankt.
In Abschnitt 11 werden die Änderungen bei der Anwendung der Verfahren sowie die Methoden, die angewendet werden können, und wichtige Überlegungen bei der Auswahl der Messparameter besprochen, die sich jedoch nach wie vor im Anwendungsbereich dieses Dokuments befinden.
Technologie du combustible nucléaire - Dosage du plutonium par coulométrie à potentiel imposé (ISO 12183:2016)
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.
Tehnologija jedrskih goriv - Kulometrična analiza plutonija z nadzorovanim potencialom (ISO 12183:2016)
Standard ISO 12183:2016 opisuje analitično metodo za elektrokemično analizo čistih raztopin plutonijevega nitrata jedrske kakovosti s skupno negotovostjo, ki ne presega ±0,2 % pri stopnji zaupanja 0,95 za eno določanje (faktor pokritja, K = 2). Metoda je primerna za vodne raztopine, ki vsebujejo več kot 0,5 g/l plutonija in testne vzorce, ki vsebujejo med 4 mg in 15 mg plutonija. Uporaba te tehnike pri raztopinah, ki vsebujejo manj kot 0,5 g/l in testnih vzorcih, ki vsebujejo manj kot 4 mg plutonija, od uporabnika zahteva eksperimentalni prikaz, da se zagotovi zahtevana kakovost podatkov.
V nekaterih primerih je pred merjenjem potrebno čiščenje preskusnih vzorcev z izmenjavo anionov, da se odstrani moteče snovi, ko so te prisotne v pomembni količini.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2019
Tehnologija jedrskih goriv - Kulometrična analiza plutonija z nadzorovanim
potencialom (ISO 12183:2016)
Nuclear fuel technology - Controlled-potential coulometric assay of plutonium (ISO
12183:2016)
Kernbrennstofftechnologie - Coulometrische Bestimmung von Plutonium mit
kontrolliertem Potential (ISO 12183:2016)
Technologie du combustible nucléaire - Dosage du plutonium par coulométrie à potentiel
imposé (ISO 12183:2016)
Ta slovenski standard je istoveten z: EN ISO 12183:2019
ICS:
27.120.30 Cepljivi materiali in jedrska Fissile materials and nuclear
gorivna tehnologija fuel technology
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 12183
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2019
EUROPÄISCHE NORM
ICS 27.120.30
English Version
Nuclear fuel technology - Controlled-potential coulometric
assay of plutonium (ISO 12183:2016)
Technologie du combustible nucléaire - Dosage du Kernbrennstofftechnologie - Coulometrische
plutonium par coulométrie à potentiel imposé (ISO Bestimmung von Plutonium mit kontrolliertem
12183:2016) Potential (ISO 12183:2016)
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.
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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 12183:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 12183:2016 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 12183:2019 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 12183:2016 has been approved by CEN as EN ISO 12183:2019 without any modification.
INTERNATIONAL ISO
STANDARD 12183
Third edition
2016-08-15
Nuclear fuel technology — Controlled-
potential coulometric assay of
plutonium
Technologie du combustible nucléaire — Dosage du plutonium par
coulométrie à potentiel imposé
Reference number
ISO 12183:2016(E)
©
ISO 2016
ISO 12183:2016(E)
© ISO 2016, Published in Switzerland
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ISO 12183:2016(E)
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
7.1.1 Weighing the test sample, with an uncertainty of ±0,01 %, K = 1. . 8
7.1.2 Preparation of the test sample . 9
7.1.3 Electrode pre-treatment. 9
7.1.4 Electrical calibration of the current integration system .10
7.1.5 Formal potential determination .11
7.1.6 Coulometric blank determination.12
7.1.7 Plutonium measurement .13
7.2 Analysis of subsequent test samples .13
8 Expression of results .14
8.1 Calculation of the electrical calibration factor .14
8.2 Calculation of the blank .14
8.3 Fraction of electrolysed plutonium .15
8.4 Plutonium content .16
8.5 Quality control .16
9 Characteristics of the method .16
9.1 Repeatability .16
9.2 Confidence interval .17
9.3 Analysis time .17
10 Interferences .17
11 Procedure variations and optimization .21
11.1 Accountability measurements and reference material preparation .21
11.2 Process control measurements.21
11.3 Measurement cell design .21
11.4 Electrolyte and electrode options .22
11.5 Test sample size .22
11.6 Background current corrections .22
11.7 Correction for iron .23
11.8 Control-potential adjustment .24
11.9 Calibration methodologies .24
Annex A (normative) Purification by anion-exchange separation .25
Annex B (normative) Determination of formal potential, E .27
Bibliography .28
ISO 12183:2016(E)
Foreword
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