Publications - GuideRadPROS

Performance assessment of commonly used active radiation protection dosimeters for individual and area workplace monitoring

Jelena Vlahović, Nikola Kržanović, Miloš Živanović, Ivana Stojanović, Luka Bakrač, Argiro Boziari, Miloš Đaletić, Ana Fernandes, Liviu-Cristian Mihailescu, Erinc Reyhanoglu, Siarhei Saroka, Teemu Siiskonen, Jana Šmoldasová, Vladimir Sochor, Maria do Ceu Ferreira, Nataša Todorović
Journal of Radiation Research and Applied Sciences, 2026
DOI: 10.1016/j.jrras.2026.102159

Improvement in radiation protection practice may be achieved by acquisition of reliable and accurate dosimetry data. Use of dosimeters with known properties provides insight into their performance in real radiation fields encountered in radiation monitoring practice. Performance evaluation in a wide range of radiation conditions provides insight into dosimeter behaviour, providing input for revision, update and harmonization of IEC type testing standards. A total of 32 active dosimeters were investigated, of which 26 are used for area workplace, and 6 for individual monitoring. Dosimeter performance was evaluated against the IEC 60846–1:2009 standard for portable workplace and environmental meters and monitors and the IEC 61526:2024 standard for active personal dosimeters in a wide range of photon energies, angles of incidence and dose equivalent rates. Performance was examined beyond the minimum rated range: 33.3 keV–1.25 MeV photon energy; (0°; ±75°) angle of incidence for personal dosimeters and (0°; ±120° with 180°) for area dosimeters; 3 μSv h−1 – 7 Sv h−1 dose rate range. In addition, dosimeter short-term stability and overload properties were investigated. State-of-the-art and commonly used dosimeters complied with the standard defined limits of variation with respect to the manufacturer stated specifications. Some dosimeters had significantly lower variations in terms of relative response than the current standard stated requirements. Potential update of the relevant IEC type testing standards was considered, with the possibility of introducing two distinct dosimeter classes, one of which would comply with reduced limits of variation.

Re-calculation of air kerma to dose-equivalent conversion coefficients for mono-energetic photons

Šolc, J., Avilés Lucas, P., Bakrač, L., Behrens, R., Ciccotelli, A., Cornejo Díaz, N., Fernandes, A., Ketelhut, S., Kržanović, N., Pinto, M., Siiskonen, T., Sochor, V., Tesař, J., Tikkanen, J., Topalović, D. B., Van Hoey, O., Zutz, H., & Živanović, M.
Journal of Radiological Protection, 2025
DOI: 10.1088/1361-6498/adda56

This work presents new calculations of conversion coefficients (CCs) from total air kerma to dose-equivalent quantities H’(0.07), H’(3), H*(10), Hp(0.07), Hp(3), and Hp(10) for area and personal dosimetry for mono-energetic photons in the energy range from 2 keV to 50 MeV, assuming secondary charged particle equilibrium. Calculations using the Monte Carlo N-Particle® (MCNP) code were performed for a large number of photon energies with the aim of preventing errors resulting from possible improper interpolation between currently available sparsely spaced CC values, when an average CC value over a photon fluence spectrum needs to be determined. The CC values were compared with the values published in the ISO 4037-3:2019 standard. A very close agreement was achieved for the majority of CCs. Larger discrepancies were found for some CCs, often for low photon energies or large angles of radiation incidence, which were taken from older publications or when CC values were interpolated or extrapolated. Furthermore, some differences were found in the MeV energy range, which are significant for dosimeter calibrations, e.g. the presented values of CC to H*(10) for the main photon energies of 137Cs and 60Co radionuclides are both lower by 2.8%. Finally, it was found that the values of CCs to Hp(0.07; E, α)slab given in ISO 4037-3:2019 were not taken correctly from the source publication. In conclusion, the CC values given in ISO 4037-3:2019 should be updated in view of the results obtained.

Towards metrological best practices in radiation protection

Ferreira, M., Siiskonen, T., & Zivanovich, M.
Proceedings of the International Joint Conference on Industrial Engineering and Operations Management, 2024
DOI: 10.14488/ijcieom2024_full_0057_37886

This paper presents the state of the art and expected impact on metrology, health, standards, and society of the new joint research project 22NRM07 GuideRadPROS, started in June 2023 and is running for 36 months. The main objective is to provide technical guidance to metrology institutes, standardization bodies, regulators, and manufacturers for a harmonized approach to calibration, testing, and measurements using the radiation protection dosimeters for photon radiation. Moreover, manufacturers and standardization bodies will be helped to prepare for the forthcoming change in radiation protection quantities. The results of this research project will facilitate the take up of the technology and measurement infrastructure developed and consequently will ensure the improvement of the measurement supply chain from the manufactures to the end users. New guides and new protocols provided by this research will represent a contribution towards best metrological practices in radiation measurements in line with technological developments and requirements from standardization. This project was selected for funding through the European Partnership on Metrology program of the European Commission and the participating countries. It involves several participants from national metrology institutes and designated institutes and a private company.