EN ISO 11929-3:2021
(Main)Determination of the characteristic limits (decision threshold, detection limit and limits of the coverage interval) for measurements of ionizing radiation - Fundamentals and application - Part 3: Applications to unfolding methods (ISO 11929-3:2019)
Determination of the characteristic limits (decision threshold, detection limit and limits of the coverage interval) for measurements of ionizing radiation - Fundamentals and application - Part 3: Applications to unfolding methods (ISO 11929-3:2019)
The ISO 11929 series specifies a procedure, in the field of ionizing radiation metrology, for the calculation of the "decision threshold", the "detection limit" and the "limits of the coverage interval" for a non-negative ionizing radiation measurand when counting measurements with preselection of time or counts are carried out. The measurand results from a gross count rate and a background count rate as well as from further quantities on the basis of a model of the evaluation. In particular, the measurand can be the net count rate as the difference of the gross count rate and the background count rate, or the net activity of a sample. It can also be influenced by calibration of the measuring system, by sample treatment and by other factors.
ISO 11929 has been divided into four parts covering elementary applications in ISO 11929-1, advanced applications on the basis of the ISO/IEC Guide 98-3-1 in ISO 11929-2, applications to unfolding methods in this document, and guidance to the application in ISO 11929-4.
ISO 11929-1 covers basic applications of counting measurements frequently used in the field of ionizing radiation metrology. It is restricted to applications for which the uncertainties can be evaluated on the basis of the ISO/IEC Guide 98-3 (JCGM 2008). In Annex A of ISO 11929-1:2019, the special case of repeated counting measurements with random influences is covered, while measurements with linear analogous ratemeters, are covered in Annex B of ISO 11929-1:2019.
ISO 11929-2 extends the former ISO 11929:2010 to the evaluation of measurement uncertainties according to the ISO/IEC Guide 98-3-1. ISO 11929-2 also presents some explanatory notes regarding general aspects of counting measurements and on Bayesian statistics in measurements.
This document deals with the evaluation of measurements using unfolding methods and counting spectrometric multi-channel measurements if evaluated by unfolding methods, in particular, for alpha- and gamma‑spectrometric measurements. Further, it provides some advice on how to deal with correlations and covariances.
ISO 11929-4 gives guidance to the application of the ISO 11929 series, summarizes shortly the general procedure and then presents a wide range of numerical examples.
ISO 11929 Standard also applies analogously to other measurements of any kind especially if a similar model of the evaluation is involved. Further practical examples can be found, for example, in ISO 18589[7], ISO 9696[2], ISO 9697[3], ISO 9698[4], ISO 10703[5], ISO 7503[1], ISO 28218[8], and ISO 11665[6].
NOTE A code system, named UncertRadio, is available for calculations according to ISO 11929- 1 to ISO 11929-3. UncertRadio[35][36] can be downloaded for free from https://www.thuenen.de/en/fi/fields-of-activity/marine-environment/coordination-centre-of-radioactivity/uncertradio/. The download contains a setup installation file which copies all files and folders into a folder specified by the user. After installation one has to add information to the PATH of Windows as indicated by a pop‑up window during installation. English language can be chosen and extensive "help" information is available.
Bestimmung der charakteristischen Grenzen (Erkennungsgrenze, Nachweisgrenze und Grenzen des Überdeckungsintervalls) bei Messungen ionisierender Strahlung - Grundlagen und Anwendungen - Teil 3: Anwendung von Entfaltungstechniken (ISO 11929-3:2019)
Die Normenreihe ISO 11929 legt im Bereich der Metrologie ionisierender Strahlung ein Verfahren zur Berechnung der „Erkennungsgrenze“, der „Nachweisgrenze“ und der „Grenzen des Überdeckungsintervalls“ für eine nicht-negative Messgröße der ionisierenden Strahlung bei Messungen mit Zeit- und Impulsvorwahl fest. Das Messergebnis ergibt sich aus den Ergebnissen von Messungen einer Bruttozählrate und einer Null-effektzähl¬rate sowie weiteren Größen aufgrund eines Modells der Auswertung. Insbesondere kann die Mess-größe die Nettozählrate als Differenz der Bruttozählrate und der Nulleffektzählrate oder die Nettoaktivität einer Probe sein. Sie kann auch durch Kalibrierung der Messeinrichtung, Probenbehandlung und andere Faktoren beeinflusst sein.
ISO 11929 ist in vier Teile aufgeteilt: elementare Anwendungen in ISO 11929 1, fortgeschrittene Anwendun¬gen auf der Grundlage von ISO/IEC Guide 98 3 1 in ISO 11929 2, Anwendungen auf Entfaltungsmethoden in ISO 11929 3 und Anleitungen zur Anwendung in ISO 11929 4.
ISO 11929 1 behandelt elementare Anwendungen zählender Messungen, wie sie häufig im Bereich der Metrologie ionisierender Strahlung auftreten werden. Sie beschränkt sich auf Anwendungen, bei denen die Unsicherheiten auf der Grundlage des ISO/IEC Guide 98 3 (JCGM 2008) ermittelt werden können. In ISO 11929 1:2019, Anhang A, wird der spezielle Fall wiederholter zählender Messungen mit zufälligen Ein-flüssen und in ISO 11929 1:2019, Anhang B, werden Messungen mit linearen analogen Ratemetern behan¬delt.
ISO 11929-2 erweitert die frühere ISO 11929:2010 um die Auswertung von Messungen, bei denen die Mess-unsicherheiten nach ISO/IEC Guide 98 3 1 ermittelt werden. ISO 11929 2 enthält außerdem Erläuterungen zu allgemeinen Aspekten zählender Messungen und zur Anwendung der Bayes-Statistik auf Messungen.
Dieses Dokument behandelt die Auswertung von Messungen mit Hilfe von Entfaltungstechniken und zäh-lende Vielkanalmessungen, falls sie mit Entfaltungsmethoden ausgewertet werden, insbesondere für alpha- und gamma-spektrometrische Messungen. Außerdem gibt es Anleitungen, wie mit Korrelationen und Kovari-anzen zu verfahren ist.
ISO 11929-4 gibt nach einer kurzen Darstellung des Verfahrens mit einer Fülle von numerischen Beispielen Anleitungen zur Anwendung der Normenreihe ISO 11929.
Sinngemäß gilt ISO 11929 auch bei anderen Messungen gleich welcher Art, wenn ein ähnliches Modell der Auswertung angewendet wird. Weitere praktische Beispiele können anderen ISO-Normen entnom¬men wer¬den, z. B. ISO 7503 [1], ISO 9696 [2], ISO 9697 [3], ISO 9698 [4], ISO 10703 [5], ISO 11665 [6], ISO 18589 [7] und ISO 28218 [8].
ANMERKUNG Ein Programmpaket namens UncertRadio ist für Berechnungen nach ISO 11929 1 bis ISO 11929 3 ver¬fügbar. UncertRadio [35], [36] kann unter https://www.thuenen.de/de/fi/arbeitsbereiche/meeresumwelt/leitstelle-umweltra¬dioaktivität-in-fisch/uncertradio/ kostenfrei heruntergeladen werden. Der Download enthält eine Installationsdatei, die alle Dateien in einen vom Benutzer festgelegten Ordner kopiert. Nach der Installation ist noch eine Information, die während der Installation durch ein Pop-up-Fenster angezeigt wird, zum „PFAD“ von Windows hinzuzufügen. Es kann die englische Sprache gewählt werdenN2 und es ist eine ausführliche „Hilfe“-Information verfügbar.
Détermination des limites caractéristiques (seuil de décision, limite de détection et extrémités de l'intervalle élargi) pour mesurages de rayonnements ionisants - Principes fondamentaux et applications - Partie 3: Applications aux méthodes de déconvolution (ISO 11929-3:2019)
La série ISO 11929 spécifie une procédure applicable, dans le domaine de la métrologie des rayonnements ionisants, pour le calcul du «seuil de décision», de la «limite de détection» et des «limites de l'intervalle élargi» pour un mesurande de rayonnement ionisant non négatif, lorsque des mesurages par comptage sont effectués avec une présélection du temps ou du nombre d'impulsions. Le mesurande résulte d'un taux de comptage brut et d'un taux de comptage du bruit de fond ainsi que de grandeurs supplémentaires reposant sur un modèle d'évaluation. En particulier, le mesurande peut être le taux de comptage net défini comme la différence du taux de comptage brut et du taux de comptage du bruit de fond, ou l'activité nette d'un échantillon. Il peut également être influencé par l'étalonnage du système de mesure, par le traitement de l'échantillon et par d'autres facteurs.
L'ISO 11929 a été scindée en quatre parties couvrant les applications élémentaires dans l'ISO 11929-1, les applications avancées reposant sur le Guide ISO/IEC 98-3-1 dans l'ISO 11929-2, les applications aux méthodes de déconvolution dans le présent document, et les recommandations d'application dans l'ISO 11929-4.
L'ISO 11929-1 couvre les applications de base des mesurages par comptage souvent utilisées dans le domaine de la métrologie des rayonnements ionisants. Elle se limite aux applications pour lesquelles il est possible d'évaluer les incertitudes sur la base du Guide ISO/IEC 98-3 (JCGM 2008). L'Annexe A de l'ISO 11929-1:2019 traite du cas particulier des mesurages répétés par comptage avec des influences aléatoires, alors que l'Annexe B de l'ISO 11929-1:2019 couvre les mesurages avec des ictomètres analogiques linéaires.
L'ISO 11929-2 étend l'ancienne ISO 11929:2010 à l'évaluation des incertitudes de mesure conformément au Guide ISO/IEC 98-3-1. L'ISO 11929-2 contient également plusieurs notes explicatives concernant les aspects généraux des mesurages par comptage et les statistiques bayésiennes dans les mesurages.
Le présent document traite de l'évaluation des mesurages en utilisant des méthodes de déconvolution ainsi que de l'évaluation des mesurages multicanaux spectrométriques par comptage en cas d'évaluation par des méthodes de déconvolution, en particulier pour les mesurages spectrométriques alpha et gamma. Il fournit en outre des conseils pour le traitement avec des corrélations et des covariances.
L'ISO 11929-4 fournit des recommandations pour l'application de la série ISO 11929, résume les grandes lignes de la procédure générale et présente ensuite un large éventail d'exemples numériques.
La norme ISO 11929 s'applique également de manière analogue à d'autres mesurages de tout type, notamment si un modèle d'évaluation similaire est concerné. D'autres exemples pratiques sont, par exemple, disponibles dans l'ISO 18589[7], l'ISO 9696[2], l'ISO 9697[3], l'ISO 9698[4], l'ISO 10703[5], l'ISO 7503[1], l'ISO 28218[8] et l'ISO 11665[6].
NOTE Un logiciel, baptisé UncertRadio, est disponible pour les calculs conformes aux ISO 11929-1 à ISO 11929-3. UncertRadio[35][36] peut être téléchargé gratuitement à l'adresse: https://www.thuenen.de/en/fi/fields-of-activity/marine-environment/coordination-centre-of-radioactivity/ uncertradio/. Le logiciel disponible en téléchargement contient un fichier d'installation qui copie tous les fichiers et dossiers à un emplacement spécifié par l'utilisateur. Après l'installation, des informations doivent être saisies concernant le CHEMIN
Ugotavljanje karakterističnih mej (odločitveni prag, zaznavanje meje in omejitev intervala pokritja) pri meritvah ionizirnega sevanja - Osnove in uporaba - 3. del: Uporaba metod odkrivanja (ISO 11929-3:2019)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2021
Ugotavljanje karakterističnih mej (odločitveni prag, zaznavanje meje in omejitev
intervala pokritja) pri meritvah ionizirnega sevanja - Osnove in uporaba - 3. del:
Uporaba metod odkrivanja (ISO 11929-3:2019)
Determination of the characteristic limits (decision threshold, detection limit and limits of
the coverage interval) for measurements of ionizing radiation - Fundamentals and
application - Part 3: Applications to unfolding methods (ISO 11929-3:2019)
Bestimmung der charakteristischen Grenzen (Erkennungsgrenze, Nachweisgrenze und
Grenzen des Überdeckungsintervalls) bei Messungen ionisierender Strahlung -
Grundlagen und Anwendungen - Teil 3: Anwendung von Entfaltungstechniken (ISO
11929-3:2019)
Détermination des limites caractéristiques (seuil de décision, limite de détection et
extrémités de l'intervalle élargi) pour mesurages de rayonnements ionisants - Principes
fondamentaux et applications - Partie 3: Applications aux méthodes de déconvolution
(ISO 11929-3:2019)
Ta slovenski standard je istoveten z: EN ISO 11929-3:2021
ICS:
17.240 Merjenje sevanja Radiation measurements
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 11929-3
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2021
EUROPÄISCHE NORM
ICS 17.240
English Version
Determination of the characteristic limits (decision
threshold, detection limit and limits of the coverage
interval) for measurements of ionizing radiation -
Fundamentals and application - Part 3: Applications to
unfolding methods (ISO 11929-3:2019)
Détermination des limites caractéristiques (seuil de Bestimmung der charakteristischen Grenzen
décision, limite de détection et extrémités de (Erkennungsgrenze, Nachweisgrenze und Grenzen des
l'intervalle élargi) pour mesurages de rayonnements Überdeckungsintervalls) bei Messungen ionisierender
ionisants - Principes fondamentaux et applications - Strahlung - Grundlagen und Anwendungen - Teil 3:
Partie 3: Applications aux méthodes de déconvolution Anwendung von Entfaltungstechniken (ISO 11929-
(ISO 11929-3:2019) 3:2019)
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
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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
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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 11929-3:2021 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 11929-3:2019 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 11929-3:2021 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 11929-3:2019 has been approved by CEN as EN ISO 11929-3:2021 without any
modification.
INTERNATIONAL ISO
STANDARD 11929-3
Second edition
2019-02
Determination of the characteristic
limits (decision threshold, detection
limit and limits of the coverage
interval) for measurements of ionizing
radiation — Fundamentals and
application —
Part 3:
Applications to unfolding methods
Détermination des limites caractéristiques (seuil de décision, limite
de détection et extrémités de l'intervalle élargi) pour mesurages de
rayonnements ionisants — Principes fondamentaux et applications —
Partie 3: Applications aux méthodes de déploiement
Reference number
ISO 11929-3:2019(E)
©
ISO 2019
ISO 11929-3:2019(E)
© 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
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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
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Published in Switzerland
ii © ISO 2019 – All rights reserved
ISO 11929-3:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Quantities and symbols . 6
5 Evaluation of a measurement using unfolding methods . 8
5.1 General aspects . 8
5.2 Models of unfolding and general uncertainty evaluation . 8
5.3 Unfolding as a sub-model .10
5.4 Input quantities and their uncertainties .10
5.5 Parameters of unfolding.11
5.6 Procedure for unfolding .12
5.7 Modification for Poisson distributed count numbers for unfolding .14
5.8 Evaluation of the primary results and their associated standard uncertainties .15
5.9 Standard uncertainty as a function of an assumed true value of the measurand .16
5.10 Decision threshold, detection limit and assessments .17
5.10.1 Specifications .17
5.10.2 Decision threshold.18
5.10.3 Detection limit .18
5.10.4 Assessments . . .18
5.11 Coverage interval and the best estimate and its associated standard uncertainty.18
5.11.1 General aspects .18
5.11.2 The probabilistically symmetric coverage interval .19
5.11.3 The shortest coverage interval .20
5.12 Documentation .20
Annex A (informative) Correlations and covariances .22
Annex B (informative) Spectrum unfolding in nuclear spectrometric measurement .25
Bibliography .37
ISO 11929-3:2019(E)
Foreword
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This document was prepared by This document was prepared by ISO/TC 85, Nuclear energy, nuclear
technologies, and radiological protection, Subcommittee SC 2, Radiological protection.
This second edition of ISO 11929-3 together with ISO 11929-1, ISO 11929-2, cancels and replaces
ISO 11929:2010 which have been technically revised, specifically with reference to
...
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