The main objective of this internship is to develop a personal whole-body dosimeter suitable for estimating the effective dose while wearing radioprotective garments. A model of such dosimeter has already been designed at the SCK•CEN by means of Monte Carlo calculations, but further improvement of its performance is still possible.
The energy and angular dependence of the effective dose has already been calculated for photon exposure conditions of interest in interventional radiology and cardiology using the Reference Computational Male Phantom of ICRP 110 equipped with 0.5 mm lead garments. These results are used as a reference to evaluate the performance of the new dosimeter, which should provide a conservative estimation of the effective dose with minimum possible overestimation for all the exposure conditions considered.
The idea of this project is to improve the design of current dosimeter elements by, for instance, evaluating the effect of different filter materials, shapes and thicknesses, on the dose received by the radiation detectors of the dosimeter. This will, in turns, determine the dose response of the dosimeter. The energy and angular dependence of the dose estimated by the dosimeter will be investigated for different dosimeter geometries by means of Monte Carlo calculations using the radiation transport code MCNPX (the student will learn how to use this software during the internship). Once the design of the dosimeter has been optimized, a prototype will be built and then tested under different irradiation conditions. A scientific report summarizing the work done during the internship will be prepared by the student.