SIST EN ISO 6980-1:2025
(Main)Nuclear energy - Reference beta-particle radiation - Part 1: Methods of production (ISO 6980-1:2023)
Nuclear energy - Reference beta-particle radiation - Part 1: Methods of production (ISO 6980-1:2023)
This document specifies the requirements for reference beta radiation fields produced by radioactive sources to be used for the calibration of personal and area dosemeters and dose-rate meters to be used for the determination of the quantities Hp(0,07), H'(0,07;Ω), Hp(3) and H'(3;Ω), and for the determination of their response as a function of beta particle energy and angle of incidence. The basic quantity in beta dosimetry is the absorbed-dose rate in a tissue-equivalent slab phantom. This document gives the characteristics of radionuclides that have been used to produce reference beta radiation fields, gives examples of suitable source constructions and describes methods for the measurement of the residual maximum beta particle energy and the dose equivalent rate at a depth of 0,07 mm in the International Commission on Radiation Units and Measurements (ICRU) sphere. The energy range involved lies between 0,22 MeV and 3,6 MeV maximum beta energy corresponding to 0,07 MeV to 1,2 MeV mean beta energy and the dose equivalent rates are in the range from about 10 µSv·h-1 to at least 10 Sv·h-1.. In addition, for some sources, variations of the dose equivalent rate as a function of the angle of incidence are given. However, as noted in ICRU 56[5], the ambient dose equivalent, H*(10), used for area monitoring, and the personal dose equivalent, Hp(10), as used for individual monitoring, of strongly penetrating radiation, are not appropriate quantities for any beta radiation, even that which penetrates 10 mm of tissue (Emax > 2 MeV).
This document is applicable to two series of reference beta radiation fields, from which the radiation necessary for determining the characteristics (calibration and energy and angular dependence of response) of an instrument can be selected.
Series 1 reference radiation fields are produced by radioactive sources used with beam-flattening filters designed to give uniform dose equivalent rates over a large area at a specified distance. The proposed sources of 106Ru/106Rh, 90Sr/90Y, 85Kr, 204Tl and 147Pm produce maximum dose equivalent rates of approximately 200 mSv·h–1.
Series 2 reference radiation fields are produced without the use of beam-flattening filters, which allows large area planar sources and a range of source-to-calibration plane distances to be used. Close to the sources, only relatively small areas of uniform dose rate are produced, but this series has the advantage of extending the energy and dose rate ranges beyond those of series 1. The series also include radiation fields using polymethylmethacrylate (PMMA) absorbers to reduce the maximum beta particle energy. The radionuclides used are those of series 1; these sources produce dose equivalent rates of up to 10 Sv·h–1.
Énergie nucléaire - Rayonnement bêta de référence - Partie 1: Méthodes de production (ISO 6980-1:2023)
Le présent document spécifie les exigences relatives aux champs de rayonnement bêta de référence produits par les sources radioactives à utiliser pour l'étalonnage des dosimètres de zone, des dosimètres individuels et des débitmètres de dose destinés à être utilisés pour le mesurage des grandeurs Hp(0,07), H'(0,07;Ω), Hp(3) et H'(3;Ω), et pour la détermination de leur réponse en fonction de l'énergie des particules bêta et de l'angle d'incidence. En dosimétrie bêta, la grandeur fondamentale est le débit de dose absorbée dans un fantôme-plaque équivalent tissu. Le présent document donne les caractéristiques des radionucléides qui ont été utilisés pour produire des champs de rayonnement bêta de référence; il donne également des exemples de construction de sources appropriées et décrit des méthodes de mesure de l'énergie maximale résiduelle des particules bêta et du débit d'équivalent de dose à une profondeur de 0,07 mm dans la sphère ICRU (de l’anglais «International Commission on Radiation Units and Measurements» - Commission internationale des unités et mesures radiologiques). La plage d'énergie concernée se situe entre 0,22 MeV et 3,6 MeV en énergie bêta maximale, soit 0,07 MeV à 1,2 MeV en énergie bêta moyenne, et les débits d'équivalent de dose sont compris entre 10 µSv·h–1 et au moins 10 Sv·h–1. Pour certaines sources, les variations du débit d'équivalent de dose en fonction de l'angle d'incidence sont également fournies. Comme le souligne toutefois le rapport ICRU 56[5], l'équivalent de dose ambiant, H*(10), et l'équivalent de dose individuel, Hp(10), utilisés pour la surveillance de zone et pour la surveillance individuelle, respectivement, dans le cas de rayonnements fortement pénétrants ne sont pas des grandeurs appropriées pour un rayonnement bêta, même pour un rayonnement capable de traverser une épaisseur de tissu de 10 mm (Emax > 2 MeV).
Le présent document s'applique à deux séries de champs de rayonnement bêta de référence parmi lesquels le rayonnement nécessaire pour déterminer les caractéristiques (étalonnage, dépendance énergétique et angulaire de la réponse) d'un instrument peut être sélectionné.
Les champs de rayonnement de référence de la série 1 sont produits par des sources radioactives qui sont utilisées avec des filtres égalisateurs de faisceau conçus de façon à obtenir des débits d'équivalent de dose uniformes sur une surface étendue à une distance spécifiée. Les sources de 106Ru/106Rh, 90Sr/90Y, 85Kr, 204Tl et 147Pm qui sont proposées produisent des débits d'équivalent de dose maximaux d'environ 200 mSv·h–1.
Les champs de rayonnement de référence de la série 2 sont produits sans interposition de filtres égalisateurs de faisceau, ce qui permet d'utiliser des sources planes de surface étendue et une plage de distances entre la source et le plan d'étalonnage. À proximité des sources ne sont produites que des zones de débit de dose uniforme relativement peu étendues, mais cette série présente l'avantage d'étendre les plages d'énergie et de débits de dose au-delà de celles de la série 1. Cette série inclut également des champs de rayonnement utilisant des absorbeurs en polyméthacrylate de méthyle (PMMA) pour réduire l'énergie maximale des particules bêta. Les radionucléides utilisés sont ceux de la série 1; ces sources produisent des débits d'équivalent de dose pouvant atteindre 10 Sv·h–1.
Jedrska energija - Referenčno sevanje delcev beta - 1. del: Metode izdelave (ISO 6980-1:2023)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2025
Jedrska energija - Referenčno sevanje delcev beta - 1. del: Metode izdelave (ISO
6980-1:2023)
Nuclear energy - Reference beta-particle radiation - Part 1: Methods of production (ISO
6980-1:2023)
Énergie nucléaire - Rayonnement bêta de référence - Partie 1: Méthodes de production
(ISO 6980-1:2023)
Ta slovenski standard je istoveten z: EN ISO 6980-1:2025
ICS:
17.240 Merjenje sevanja Radiation measurements
27.120.01 Jedrska energija na splošno Nuclear energy in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 6980-1
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2025
EUROPÄISCHE NORM
ICS 17.240
English Version
Nuclear energy - Reference beta-particle radiation - Part 1:
Methods of production (ISO 6980-1:2023)
Énergie nucléaire - Rayonnement bêta de référence -
Partie 1: Méthodes de production (ISO 6980-1:2023)
This European Standard was approved by CEN on 22 September 2025.
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
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© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6980-1:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 6980-1:2023 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 6980-1:2025 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 March 2026, and conflicting national standards shall
be withdrawn at the latest by March 2026.
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.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 6980-1:2023 has been approved by CEN as EN ISO 6980-1:2025 without any
modification.
INTERNATIONAL ISO
STANDARD 6980-1
Third edition
2023-11
Nuclear energy — Reference beta-
particle radiation —
Part 1:
Methods of production
Énergie nucléaire — Rayonnement bêta de référence —
Partie 1: Méthodes de production
Reference number
ISO 6980-1:2023(E)
ISO 6980-1:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ii
ISO 6980-1:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Requirements for reference beta-particle radiation fields at the calibration distance .2
4.1 Standard test conditions . 2
4.2 Energy of the reference radiation fields . 2
4.3 Shape of the beta-particle spectrum . 2
4.4 Uniformity of the dose rate . 3
4.5 Photon contamination . 3
4.6 Variation of the beta-particle emission with time . 3
5 Radionuclides suitable for reference beta-particle radiation fields .3
6 Source characteristics and their measurement . 4
6.1 Fundamental characteristics of reference sources . 4
6.1.1 Construction of reference sources . 4
6.1.2 Measurement and/or simulation of characteristics of the reference
radiation fields . 4
6.1.3 Beta particle contamination . 13
6.1.4 Photon contamination . 13
6.2 Characteristics of the two series of reference beta-particle radiation fields .13
6.2.1 General .13
6.2.2 Series 1 reference beta-particle radiation fields .13
6.2.3 Series 2 reference beta-particle radiation fields . 14
7 Source calibration .15
Annex A (normative) Tissue substitutes .17
Annex B (normative) Reference conditions and standard test conditions .18
Annex C (informative) Characteristics of the recommended sources —Examples of source
construction .20
Bibliography .21
iii
ISO 6980-1:2023(E)
Foreword
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This document was prepared by Technical Committee ISO/TC 85, Nuclear energy, nuclear technologies,
and radiological protection, Subcommittee SC 2, Radiological protection.
This third edition of ISO 6980-1 cancels and replaces ISO 6980-1:2022, of which it constitutes a minor
revision.
The main changes are as follows:
— editorial changes throughout the document.
A list of all the parts in the ISO 6980 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
ISO 6980-1:2023(E)
Introduction
ISO 6980 series covers the production, calibration, and use of reference beta-particle radiation fields for
the calibration of dosemeters and dose-rate meters for protection purposes. This document describes
the methods of production and characterization of the reference radiation. ISO 6980-2 describes
procedures for the determination of absorbed dose rate to a reference depth of tissue from beta particle
reference radiation fields. ISO 6980-3 describes procedures for the calibration of dosemeters and dose-
rate meters and the determination of their response as a function of beta-particle energy and angle of
beta-particle incidence.
For beta particles, the calib
...
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