ISO 4037-3:2019
Radiological protection — X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy — Part 3: Calibration of area and personal dosemeters and the measurement of their response as a function of energy and angle of incidence
Radiological protection — X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy — Part 3: Calibration of area and personal dosemeters and the measurement of their response as a function of energy and angle of incidence
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 68
- Дата публикации:
- 30 января 2019 г.
- Издание:
- ISO IS 4037 edition 2 version 1
- ICS:
- 17.240
This document specifies additional procedures and data for the calibration of dosemeters and doserate meters used for individual and area monitoring in radiation protection. The general procedure for the calibration and the determination of the response of radiation protection dose(rate)meters is described in ISO 29661 and is followed as far as possible. For this purpose, the photon reference radiation fields with mean energies between 8 keV and 9 MeV, as specified in ISO 4037-1, are used. In Annex D some additional information on reference conditions, required standard test conditions and effects associated with electron ranges are given. For individual monitoring, both whole body and extremity dosemeters are covered and for area monitoring, both portable and installed dose(rate)meters are covered. Charged particle equilibrium is needed for the reference fields although this is not always established in the workplace fields for which the dosemeter should be calibrated. This is especially true at photon energies without inherent charged particle equilibrium at the reference depth d, which depends on the actual combination of energy and reference depth d. Electrons of energies above 65 keV, 0,75 MeV and 2,1 MeV can just penetrate 0,07 mm, 3 mm and 10 mm of ICRU tissue, respectively, and the radiation qualities with photon energies above these values are considered as radiation qualities without inherent charged particle equilibrium for the quantities defined at these depths. This document also deals with the determination of the response as a function of photon energy and angle of radiation incidence. Such measurements can represent part of a type test in the course of which the effect of further influence quantities on the response is examined. This document is only applicable for air kerma rates above 1 µGy/h. This document does not cover the in-situ calibration of fixed installed area dosemeters. The procedures to be followed for the different types of dosemeters are described. Recommendations are given on the phantom to be used and on the conversion coefficients to be applied. Recommended conversion coefficients are only given for matched reference radiation fields, which are specified in ISO 4037-1:2019, Clauses 4 to 6. ISO 4037‑1:2019, Annexes A and B, both informative, include fluorescent radiations, the gamma radiation of the radionuclide 241Am, S-Am, for which detailed published information is not available. ISO 4037-1:2019, Annex C, gives additional X radiation fields, which are specified by the quality index. For all these radiation qualities, conversion coefficients are given in Annexes A to C, but only as a rough estimate as the overall uncertainty of these conversion coefficients in practical reference radiation fields is not known. NOTE The term dosemeter is used as a generic term denoting any dose or doserate meter for individual or area monitoring.
Abstract
Overview
ISO 4037-3:2019 - Radiological protection - Part 3 - provides detailed procedures and data for the calibration of area and personal dosemeters and doserate meters using X‑ and gamma‑ray reference radiation. It builds on the general calibration and response-determination approach in ISO 29661 and uses photon reference radiation fields specified in ISO 4037‑1:2019 (mean energies between 8 keV and 9 MeV). The standard covers calibration methods, conversion coefficients, and the measurement of dosemeter response as a function of photon energy and angle of incidence. It applies for air kerma rates above 1 µGy/h and addresses whole‑body and extremity personal dosemeters as well as portable and installed area dosemeters (but not the in‑situ calibration of fixed installed area dosemeters).
Key topics and requirements
- Reference radiation fields: Use of ISO 4037‑1 matched reference radiation fields (8 keV–9 MeV) for calibration and response tests.
- Calibration procedures: Methods for determining calibration factors and response following ISO 29661 principles where applicable.
- Conversion coefficients: Recommended conversion coefficients from air kerma to operational quantities (H*(10), H'(3), H'(0.07), H p(10), H p(3), H p(0.07)) for matched fields; Annexes include coefficients for fluorescence X‑rays, 241Am gamma, and additional X‑ray qualities.
- Energy & angular response: Procedures for measuring dosemeter response versus photon energy and angle of incidence - often part of type testing.
- Phantoms and geometry: Recommendations on rod, pillar and ICRU slab/cylinder phantoms and geometrical conditions for personal dosimetry calibration.
- Charged particle equilibrium (CPE): Guidance on CPE limitations - photon energies above certain electron‑penetration thresholds (electrons >65 keV, 0.75 MeV and 2.1 MeV correspond to 0.07 mm, 3 mm and 10 mm ICRU tissue depths) can result in lack of inherent CPE at reference depths.
- Uncertainty and limits: Annex D gives additional information on reference/test conditions and electron-range effects; conversion coefficients for some qualities are given only as rough estimates due to unknown overall uncertainty in practical fields.
Applications
- Calibration laboratories and national metrology institutes performing type and routine calibration of personal and area dosemeters and doserate meters.
- Dosimetry service providers supporting occupational radiation protection in hospitals, nuclear power, research reactors, and industrial radiography.
- Manufacturers validating device performance (energy/angular response) as part of type testing and conformity assessment.
- Regulators and health physics teams specifying calibration and acceptance testing requirements.
Who should use this standard
- Calibration labs, dosemetry service providers, radiation safety officers, device manufacturers, and regulatory authorities involved in radiological protection and occupational dosimetry.
Related standards
- ISO 4037‑1:2019 - Specification of X and gamma reference radiation fields.
- ISO 29661 - General procedure for calibration and response determination of radiation protection dose(rate)meters.
Технические детали
- Технический комитет
- ISO/TC 85/SC 2 - Radiological protection
- SKU
- ISO 4037-3:2019
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ISO 4037-1:2019
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Overview ISO 4037-1:2019 - "Radiological protection - X and gamma reference radiation for calibrating dosemeters and doserate meters - Part 1: Radiation characteristics and production methods" specif…