ISO 27048:2011
(Main)Radiation protection - Dose assessment for the monitoring of workers for internal radiation exposure
Radiation protection - Dose assessment for the monitoring of workers for internal radiation exposure
ISO 27048:2011 specifies the minimum requirements for the evaluation of data from the monitoring of workers occupationally exposed to the risk of internal contamination by radioactive substances. It presents procedures and assumptions for the standardised interpretation of monitoring data, in order to achieve acceptable levels of reliability. Those procedures allow the quantification of exposures for the documentation of compliance with regulations and radiation protection programmes. Limits are set for the applicability of the procedures in respect of the dose levels above which more sophisticated methods will have to be applied. ISO 27048:2011 addresses the following: procedures for dose assessment based on reference levels for routine and special monitoring programmes; assumptions for the selection of dose-critical parameter values; criteria for determining the significance of monitoring results; interpretation of workplace monitoring results; uncertainties arising from sampling, measurement techniques and working conditions; the special topics of interpretation of multiple data arising from different measurement methods at different times, handling data below the decision threshold, rogue data, and calculation of doses to the embryo/foetus and infant; reporting/documentation; quality assurance. It is not applicable to the following: dosimetry for litigation cases; modelling for the improvement of internal dosimetry; the potential influence of decorporation measures (e.g. administration of chelating agents); the investigation of the causes or implications of an exposure; dosimetry for contaminated wounds.
Radioprotection — Estimation de la dose interne dans le cadre de la surveillance des travailleurs en cas d'exposition aux rayonnements
L'ISO 27048:2011 spécifie les exigences minimales de l'évaluation des données de la surveillance professionnelle des travailleurs exposés vis-à-vis du risque de contamination interne par des composés radioactifs. Elle présente des procédures et des hypothèses utiles à l'interprétation normalisée des données de surveillance afin d'obtenir des niveaux acceptables de fiabilité. Ces procédures permettent la quantification des expositions afin de documenter la conformité aux exigences réglementaires et aux programmes de radioprotection. L'ISO 27048:2010 établit des limites d'application de ces procédures en termes de niveaux de dose au-dessus desquelles des méthodes plus sophistiquées seront appliquées. L'ISO 27048:2011 aborde les éléments suivants: les procédures d'estimation de dose interne fondées sur les niveaux de référence utilisés dans les programmes de surveillance de routine et postincidentelle; les hypothèses pour le choix des paramètres influençant la dose interne; les critères pour déterminer l'impact des résultats de la surveillance; l'interprétation des résultats de la surveillance aux postes de travail; les incertitudes liées au recueil des échantillons, aux techniques d'analyse et aux conditions de travail; les cas particuliers suivants, concernant l'interprétation des données itératives issues des différentes méthodes de mesurage à des dates différentes, le traitement des données inférieures au seuil de décision, les données aberrantes et les estimations dosimétriques à l'embryon/fœtus et au nourrisson; le compte-rendu/la documentation; l'assurance de la qualité. L'ISO 27048:2011 ne traite pas des éléments suivants: de la dosimétrie dans les cas litigieux; de la modélisation pour l'amélioration de la dosimétrie interne; de l'influence potentielle de l'action d'un agent décorporant (par exemple administration d'agents chélatants); de l'investigation des causes ou des implications d'une exposition; de la dosimétrie des blessures contaminées.
General Information
- Status
- Published
- Publication Date
- 06-Jan-2011
- Technical Committee
- ISO/TC 85/SC 2 - Radiological protection
- Drafting Committee
- ISO/TC 85/SC 2/WG 13 - Monitoring and dosimetry for internal exposure
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 22-Jun-2022
- Completion Date
- 13-Dec-2025
Overview
ISO 27048:2011 - Radiation protection - Dose assessment for the monitoring of workers for internal radiation exposure specifies minimum requirements and standardized procedures for evaluating monitoring data from workers potentially contaminated by radioactive substances. The standard provides a framework to quantify internal doses reliably for regulatory compliance and radiation protection programmes, defines applicability limits where more advanced methods are needed, and excludes certain specialist applications (e.g., litigation dosimetry, contaminated-wound dosimetry).
Key technical topics and requirements
- Dose-assessment procedures based on reference levels for routine and special monitoring programmes.
- Selection of dose‑critical parameter values: assumptions and justification for parameter choices used in interpretations.
- Criteria for significance: how to determine whether monitoring results indicate a meaningful internal intake.
- Interpretation of workplace monitoring results, including guidance for combining and comparing results from different measurement methods and times.
- Uncertainty analysis: addressing uncertainties from sampling, measurement techniques and working conditions to support defensible dose estimates.
- Special topics: handling multiple datasets, data below the decision threshold, rogue or outlier data, and calculation of doses to the embryo/foetus and infant.
- Reporting and documentation: minimum documentation and reporting requirements to demonstrate compliance and enable review.
- Quality assurance: requirements to ensure reliable monitoring, measurement and dose-assessment practices.
- Applicability limits: defined dose levels above which more sophisticated modelling or expert methods are required.
Note: ISO 27048:2011 explicitly does not cover dosimetry for litigation, modelling to improve dosimetry methods, effects of decorporation measures (chelation), investigation of causes or implications of an exposure, or contaminated-wound dosimetry.
Practical applications and users
ISO 27048 is intended for organizations and professionals involved in occupational radiation protection, including:
- Health physicists and radiation protection specialists conducting internal dosimetry and exposure assessments.
- Occupational safety managers and employers operating facilities with potential internal contamination (nuclear, medical radionuclide handling, research, industrial radioisotope use).
- Accredited laboratories and service providers performing bioassay, whole-body or in vivo monitoring and dose calculations.
- Regulators and auditors assessing compliance with radiation protection regulations and monitoring programmes.
Practical uses include routine and special worker monitoring, documenting compliance, interpreting mixed-method monitoring results, and establishing defensible dose records for programme management.
Related standards and guidance
ISO 27048 complements national regulations and international radiological protection guidance (e.g., ICRP recommendations) and should be used alongside other ISO radiation‑protection standards and local regulatory requirements to build a complete occupational internal dosimetry programme.
Keywords: ISO 27048, radiation protection, dose assessment, internal radiation exposure, monitoring workers, internal contamination, internal dosimetry, occupational exposure, uncertainty, quality assurance.
ISO 27048:2011 - Radiation protection -- Dose assessment for the monitoring of workers for internal radiation exposure
ISO 27048:2011 - Radioprotection -- Estimation de la dose interne dans le cadre de la surveillance des travailleurs en cas d'exposition aux rayonnements
Frequently Asked Questions
ISO 27048:2011 is a standard published by the International Organization for Standardization (ISO). Its full title is "Radiation protection - Dose assessment for the monitoring of workers for internal radiation exposure". This standard covers: ISO 27048:2011 specifies the minimum requirements for the evaluation of data from the monitoring of workers occupationally exposed to the risk of internal contamination by radioactive substances. It presents procedures and assumptions for the standardised interpretation of monitoring data, in order to achieve acceptable levels of reliability. Those procedures allow the quantification of exposures for the documentation of compliance with regulations and radiation protection programmes. Limits are set for the applicability of the procedures in respect of the dose levels above which more sophisticated methods will have to be applied. ISO 27048:2011 addresses the following: procedures for dose assessment based on reference levels for routine and special monitoring programmes; assumptions for the selection of dose-critical parameter values; criteria for determining the significance of monitoring results; interpretation of workplace monitoring results; uncertainties arising from sampling, measurement techniques and working conditions; the special topics of interpretation of multiple data arising from different measurement methods at different times, handling data below the decision threshold, rogue data, and calculation of doses to the embryo/foetus and infant; reporting/documentation; quality assurance. It is not applicable to the following: dosimetry for litigation cases; modelling for the improvement of internal dosimetry; the potential influence of decorporation measures (e.g. administration of chelating agents); the investigation of the causes or implications of an exposure; dosimetry for contaminated wounds.
ISO 27048:2011 specifies the minimum requirements for the evaluation of data from the monitoring of workers occupationally exposed to the risk of internal contamination by radioactive substances. It presents procedures and assumptions for the standardised interpretation of monitoring data, in order to achieve acceptable levels of reliability. Those procedures allow the quantification of exposures for the documentation of compliance with regulations and radiation protection programmes. Limits are set for the applicability of the procedures in respect of the dose levels above which more sophisticated methods will have to be applied. ISO 27048:2011 addresses the following: procedures for dose assessment based on reference levels for routine and special monitoring programmes; assumptions for the selection of dose-critical parameter values; criteria for determining the significance of monitoring results; interpretation of workplace monitoring results; uncertainties arising from sampling, measurement techniques and working conditions; the special topics of interpretation of multiple data arising from different measurement methods at different times, handling data below the decision threshold, rogue data, and calculation of doses to the embryo/foetus and infant; reporting/documentation; quality assurance. It is not applicable to the following: dosimetry for litigation cases; modelling for the improvement of internal dosimetry; the potential influence of decorporation measures (e.g. administration of chelating agents); the investigation of the causes or implications of an exposure; dosimetry for contaminated wounds.
ISO 27048:2011 is classified under the following ICS (International Classification for Standards) categories: 13.280 - Radiation protection. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 27048:2011 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 27048
First edition
2011-01-15
Radiation protection — Dose assessment
for the monitoring of workers for internal
radiation exposure
Radioprotection — Estimation de la dose interne dans le cadre de la
surveillance des travailleurs en cas d'exposition aux rayonnements
Reference number
©
ISO 2011
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NORME ISO
INTERNATIONALE 27048
Première édition
2011-01-15
Radioprotection — Estimation de la dose
interne dans le cadre de la surveillance
des travailleurs en cas d'exposition aux
rayonnements
Radiation protection — Dose assessment for the monitoring of workers
for internal radiation exposure
Numéro de référence
©
ISO 2011
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