ISO 6980-3:2023
Nuclear energy — Reference beta-particle radiation — Part 3: Calibration of area and personal dosemeters and the determination of their response as a function of beta radiation energy and angle of incidence
Nuclear energy — Reference beta-particle radiation — Part 3: Calibration of area and personal dosemeters and the determination of their response as a function of beta radiation energy and angle of incidence
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 19
- Дата публикации:
- 22 ноября 2023 г.
- Издание:
- ISO IS 6980 edition 3 version 1
- ICS:
- 17.240
This document describes procedures for calibrating and determining the response of dosemeters and dose-rate meters in terms of the operational quantities for radiation protection purposes defined by the International Commission on Radiation Units and Measurements (ICRU). However, as noted in ICRU 56, 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 a guide for those who calibrate protection-level dosemeters and dose-rate meters with beta-reference radiation and determine their response as a function of beta-particle energy and angle of incidence. Such measurements can represent part of a type test during the course of which the effect of other influence quantities on the response is examined. This document does not cover the in-situ calibration of fixed, installed area dosemeters. The term “dosemeter” is used as a generic term denoting any dose or dose-rate meter for individual or area monitoring. In addition to the description of calibration procedures, this document includes recommendations for appropriate phantoms and the way to determine appropriate conversion coefficients. Guidance is provided on the statement of measurement uncertainties and the preparation of calibration records and certificates.
Abstract
Overview
ISO 6980-3:2023 - "Nuclear energy - Reference beta-particle radiation - Part 3" specifies procedures for the calibration of area and personal dosemeters and for determining dosemeter response as a function of beta-particle energy and angle of incidence. The standard is focused on radiation protection operational quantities as defined by ICRU and provides practical guidance for calibration laboratories and manufacturers. It explicitly notes (per ICRU 56) that ambient and personal dose equivalents used for strongly penetrating radiation (H*(10), Hp(10)) are not appropriate for beta radiation.
Key topics and technical requirements
- Calibration procedures for dose and dose-rate meters in beta reference radiation fields, including reference conditions and standard test conditions.
- A recommended three-step calibration approach:
- Measure the reference absorbed dose to tissue at 0.07 mm (optionally 3 mm) in a slab geometry.
- Apply conversion coefficients to relate the measured reference absorbed dose to the selected operational quantity.
- Position the dosemeter at the point-of-test (on phantom for personal dosemeters, free-in-air for area dosemeters) and determine response.
- Determination of correction factors k(E, α) that account for mean beta energy (E) and mean angle of incidence (α).
- Selection of sources and radiation qualities, including treatment of bremsstrahlung and photon contributions.
- Use of phantoms and geometrical guidance for personal dosemeter calibration (divergent beams, simultaneous irradiation).
- Uncertainty evaluation and guidance on reporting calibration results consistent with ISO/IEC 17025 and GUM principles.
- Calibration records and certificates: recommended content and format for traceability and conformity.
Practical applications and users
ISO 6980-3:2023 is intended for:
- Accredited calibration laboratories performing type tests and routine calibrations of protection-level dosemeters and dose-rate meters.
- Manufacturers and designers of personal and area dosemeters validating energy- and angle-dependent response.
- Radiation protection professionals in nuclear power plants, medical radiation facilities, industrial radiography and research institutions who require validated monitor performance.
- Regulatory bodies and conformity assessors verifying calibration practices and documentation.
Practical uses include dosemeter type testing, developing calibration certificates, deriving conversion coefficients for operational quantities (e.g., H′(0.07;Ω), H′(3;Ω), Hp(0.07), Hp(3)), and establishing measurement uncertainty budgets for beta radiation fields.
Related standards
- ISO 6980-1: Methods of production of beta reference radiations
- ISO 6980-2: Calibration fundamentals and absorbed dose determination
- ISO/IEC 17025:2017: Competence of testing and calibration laboratories
- ISO 29661, ICRU 56, ISO/IEC Guide 98-3 (GUM) and ISO/IEC Guide 99 (VIM)
Технические детали
- Технический комитет
- ISO/TC 85/SC 2 - Radiological protection
- SKU
- ISO 6980-3:2023
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