ISO 24426:2023
(Main)Radiological protection — Content of input data for the statistical analysis of dose records of individuals monitored for occupational exposure to ionizing radiation
Radiological protection — Content of input data for the statistical analysis of dose records of individuals monitored for occupational exposure to ionizing radiation
The objective of this document is to promote the harmonization of data and information reporting formats in order to provide the basis for the evaluation of occupational exposure with a view to allow for benchmarking capacity at the user level, technical review level, country level and global level (such as UNSCEAR) database or register on occupational exposure. Activity sectors and occupations (where employees are classified as occupationally exposed workers) that is included in this database or register as well as dose types and different values of interest concerning occupational exposure are described as follows. A typical national dose register (NDR): — contains personal, employment, and dosimetric data of occupational employment and wage statistics (OEWs) in the country. — assists national authorities in controlling and safekeeping of the occupational doses and to allow statistical evaluations (e.g., dose trends to answer requests from regulators and others). — assists in regulatory control by notifying regulatory authorities of overexposures within their jurisdiction and the licensee in their respective facility. — contributes to health research and to the scientific knowledge on risks from occupational exposure to ionizing radiation. — provides dose histories to individual workers and organizations for work planning and for compensation and litigation cases. All information provided by the NDR, including dose histories, may be subject to confidentiality requirements. This document is aimed at national dose registries but may be also applicable to dosimetry services that provide data to national dose registries. NOTE Such a database or register on occupational radiation dose for different sectors will, among other reasons, allow to prepare the data necessary for more global surveys, such as those undertaken by the UNSCEAR and other databases such as IAEA’s Information System on Occupational Exposure in Medicine, Industry and Research (ISEMIR), Information System on Occupational Exposure (ISOE) and the European Platform for Occupational Radiation Exposure (ESOREX‑Platform). Presently, as the formats are different, the international description of national statistics is often incomplete or inaccurate, and in the end, the comparison of data is not established yet in many countries. This standard defines a common and easily shared format to collect reliable, traceable and directly comparable data on individual and collective exposure in activity sectors and occupations as defined in a common way. This document addresses: a) a common list of activity sectors and occupations, and b) a common and easily shared format about dose types and different values of interest concerning occupational exposure in order to collect consistent and directly comparable data on individual and collective exposure.
Radioprotection — Format de données d’entrée pour la description statistique des dossiers de doses des personnes faisant l’objet d’une surveillance de l’exposition professionnelle aux rayonnements ionisants
General Information
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 24426
First edition
2023-12
Radiological protection — Content
of input data for the statistical
analysis of dose records of individuals
monitored for occupational exposure
to ionizing radiation
Radioprotection — Format de données d’entrée pour la description
statistique des dossiers de doses des personnes faisant l’objet d’une
surveillance de l’exposition professionnelle aux rayonnements
ionisants
Reference number
© ISO 2023
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
3.1 General terms and definitions . 2
3.2 Quantities . 3
4 Description of the nature of the exposure and classification list of activity sectors .5
5 Description of dose types .5
6 Description of statistical endpoints . 6
6.1 General . 6
6.2 Assessment of effective dose (external dosimetry, aircrew, radon and internal
dosimetry) . 6
6.3 Assessment of equivalent dose . 7
7 Additional data . 7
Annex A (informative) Description of the nature of the exposure and classification list of
activity sectors . . 9
Annex B (informative) Occupation classification .13
Annex C (informative) Example of a dose record .19
Annex D (informative) Examples of statistical endpoints .20
Bibliography .21
iii
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.
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iv
Introduction
Occupational exposure to ionizing radiation can occur in a range of industries, medical institutions,
educational and research establishments, and nuclear fuel cycle facilities. It can also occur in workplaces
with naturally occurring sources of radiation such as for underground miners to radon and aircrew to
cosmic radiation. Radiation emergencies can also result in worker exposure.
The aim of an occupational radiation exposure records system is the collection and maintenance of
comprehensive and accurate individual radiation exposure histories with supporting documentation.
Maintaining the records in a consistent format, while considering the ease of retrieval allows for:
— evaluating the effectiveness of radiological controls;
— demonstrating that radiological controls comply with national legislative and regulatory
requirements and management expectations;
— reconstructing exposure situations for medical, legal or epidemiological studies.
Recommendations of international expert bodies have been considered in the development of this
document. Its application will provide the national regulatory bodies with information on recording
and reporting of workers dosimetric results and will enhance the harmonization of a common and easily
shared format to collect reliable and directly comparable data on individual and collective exposure in
activity sectors and occupations.
Assessment of occupational exposure and evaluation of trends of these data over time is a fundamental
tool for radiation protection of workers in terms of optimization of protection in line with the graded
approach and dose limitation. Maintaining of life-time dose data of the occupationally exposed workers
is also necessary to ensure and review radiation protection of workers, certification and other legal
purposes and epidemiological studies.
v
INTERNATIONAL STANDARD ISO 24426:2023(E)
Radiological protection — Content of input data for
the statistical analysis of dose records of individuals
monitored for occupational exposure to ionizing radiation
1 Scope
The objective of this document is to promote the harmonization of data and information reporting
formats in order to provide the basis for the evaluation of occupational exposure with a view to allow
for benchmarking capacity at the user level, technical review level, country level and global level (such
as UNSCEAR) database or register on occupational exposure. Activity sectors and occupations (where
employees are classified as occupationally exposed workers) that is included in this database or register
as well as dose types and different values of interest concerning occupational exposure are described
as follows.
A typical national dose register (NDR):
— contains personal, employment, and dosimetric data of occupational employment and wage
statistics (OEWs) in the country.
— assists national authorities in controlling and safekeeping of the occupational doses and to allow
statistical evaluations (e.g., dose trends to answer requests from regulators and others).
— assists in regulatory control by notifying regulatory authorities of overexposures within their
jurisdiction and the licensee in their respective facility.
— contributes to health research and to the scientific knowledge on risks from occupational exposure
to ionizing radiation.
— provides dose histories to individual workers and organizations for work planning and for
compensation and litigation cases.
All information provided by the NDR, including dose histories, may be subject to confidentiality
requirements.
This document is aimed at national dose registries but may be also applicable to dosimetry services
that provide data to national dose registries.
NOTE Such a database or register on occupational radiation dose for different sectors will, among other
reasons, allow to prepare the data necessary for more global surveys, such as those undertaken by the UNSCEAR
and other databases such as IAEA’s Information System on Occupational Exposure in Medicine, Industry and
Research (ISEMIR), Information System on Occupational Exposure (ISOE) and the European Platform for
Occupational Radiation Exposure (ESOREX-Platform). Presently, as the formats are different, the international
description of national statistics is often incomplete or inaccurate, and in the end, the comparison of data is not
established yet in many countries. This standard defines a common and easily shared format to collect reliable,
traceable and directly comparable data on individual and collective exposure in activity sectors and occupations
as defined in a common way.
This document addresses:
a) a common list of activity sectors and occupations, and
b) a common and easily shared format about dose types and different values of interest concerning
occupational exposure in order to collect consistent and directly comparable data on individual
and collective exposure.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1 General terms and definitions
3.1.1
occupational exposure
exposure of workers incurred in the course of their work
[SOURCE: Radiation Protection and Safety of Radiation Sources: International Basic Safety Standards -
IAEA Safety Standards Series GSR Part 3, 2014]
3.1.2
monitored worker
workers routinely monitored externally, internally or in combination for radiation exposure individually
or by workplace monitoring
3.1.3
measurably exposed worker
worker with doses above the minimum detectable level
3.1.4
recording level
level of dose, exposure or intake specified by the regulatory body at or above which values of dose to,
exposure of or intake by workers are to be entered in their individual exposure records
[SOURCE: IAEA. IAEA safety glossary: 2018 edition. Vienna: IAEA, 2019. 278 p.]
3.1.5
sector
generic field of activity of workers
3.1.6
sub-sector
more specific designation of sector (3.1.5)
3.1.7
emergency exposure situation
situation of exposure that arises as a result of an accident, a malicious act or other unexpected event,
and requires prompt action in order to avoid or to reduce adverse consequences
Note 1 to entry: Exposure in an emergency can include both occupational exposure and public exposure and
can include unplanned exposures resulting directly in the emergency exposure situation and planned exposures
to emergency workers and helpe
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