ISO 20553:2025
Radiation protection — Monitoring of workers occupationally exposed to a risk of internal contamination with radioactive material
Radiation protection — Monitoring of workers occupationally exposed to a risk of internal contamination with radioactive material
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 27
- Дата публикации:
- 10 января 2025 г.
- Издание:
- ISO IS 20553 edition 2 version 1
- ICS:
- 13.280
This document specifies the minimum requirements for the design of programmes to monitor workers exposed to the risk of internal contamination by radioactive material and establishes principles for the development of compatible goals and requirements for monitoring programmes. This document specifies the a) purposes of monitoring and monitoring programmes, b) description of the different categories of monitoring programmes, c) quantitative criteria for conducting monitoring programmes, d) suitable monitoring methods and criteria for their selection, e) information that has to be collected for the design of a monitoring programme, f) general requirements for monitoring programmes (e.g. detection limits, tolerated uncertainties), g) frequencies of measurements calculated using the ICRP Occupational Intakes of Radionuclides (OIR) series, h) individual monitoring in specific cases (intake of actinides, intake via a wound and intake through the intact skin), i) quality assurance, and j) documentation, reporting and record-keeping. This document does not apply to — the monitoring of exposure to radon and its radioactive decay products, — detailed descriptions of measuring methods and techniques, — detailed procedures for in vivo measurements and in vitro analysis, — interpretation of measurements results in terms of dose, — biokinetic data and mathematical models for converting measured activities into absorbed dose, equivalent dose and effective dose, — the investigation of the causes or implications of an exposure or intake.
Abstract
Overview
ISO 20553:2025 - "Radiation protection - Monitoring of workers occupationally exposed to a risk of internal contamination with radioactive material" specifies minimum requirements for designing programmes to monitor workers at risk of internal contamination by radionuclides. The second edition updates methodology references (notably the ICRP Occupational Intakes of Radionuclides (OIR) series) and clarifies programme purposes, categories and design principles to support consistent occupational radiation protection and regulatory compliance.
Key topics and technical requirements
- Purpose and scope of monitoring programmes: Defines objectives for routine, special, task‑related and confirmatory monitoring.
- Types of monitoring: Distinguishes workplace monitoring and individual monitoring (in vivo and in vitro bioassay).
- Quantitative criteria and measurement frequency: Provides criteria and guidance for determining monitoring frequency using ICRP OIR guidance (no numerical dose conversion models or biokinetic data are defined in this standard).
- Selection of suitable methods: Sets criteria for choosing monitoring techniques and lists detection‑limit and uncertainty expectations without prescribing detailed measurement procedures.
- Information requirements for programme design: Lists the data to collect when planning monitoring (work tasks, radionuclides handled, exposure scenarios).
- Special case monitoring: Guidance for specific situations such as actinide intakes, wounds and skin absorption, and short‑lived radionuclides used in nuclear medicine.
- Quality assurance and documentation: Requirements for QA, record‑keeping, reporting and retention of monitoring data.
- Exclusions: Explicitly does not cover radon/radon progeny monitoring, detailed measurement procedures, dose interpretation, or biokinetic models.
Practical applications and users
ISO 20553:2025 is intended for organizations and professionals involved in occupational radiation protection, including:
- Radiation protection officers and safety managers designing monitoring programmes
- Employers and EHS teams in nuclear, medical isotope, radiopharmacy and industrial radiography sectors
- Occupational health professionals and dosimetrists implementing individual monitoring and record‑keeping
- Accredited laboratories performing in vivo/in vitro bioassays (in alignment with ISO 15189/ISO 17025)
- Regulators and auditors seeking harmonized programme criteria for compliance and inspections
Benefits include optimized monitoring strategies, clearer selection criteria for methods, consistent record‑keeping and improved interchangeability of monitoring data across organizations and authorities.
Related standards
- ISO 15189 - Medical laboratories - Requirements for quality and competence
- ISO 17025 - General requirements for the competence of testing and calibration laboratories
- ISO 23588 - Radiological protection - Proficiency tests for in vivo radiobioassay
- ISO 28218 - Radiation protection - Performance criteria for radiobioassay
Keywords: ISO 20553:2025, radiation protection, monitoring workers, internal contamination, radionuclides, occupational exposure, bioassay, ICRP OIR, quality assurance, monitoring programme.
Технические детали
- Технический комитет
- ISO/TC 85/SC 2 - Radiological protection
- SKU
- ISO 20553:2025
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