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Design and development of an anthropomorphic phantom equipped with detectors in order to evaluate the effective dose E at workplaces : feasibility study.

Christophe FURSTOSS, doctorate thesis of the University of Paris XI Orsay speciality Nuclear physics, 175p., defended on the 20th November 2006.

Document type > *Mémoire/HDR/Thesis

Keywords > dosimetry, Monte Carlo Code

Research Unit > IRSN/DRPH/SDE/LDRI

Authors > FURSTOSS Christophe

Publication Date > 20/11/2006


My PhD study aims to determine the feasibility to design and develop, for photon fields, an anthropomorphic phantom equipped with detectors in order to evaluate the effective dose E at workplaces. First of all, the energy losses within the organs are calculated using the MCNPX Monte Carlo code, in order to determine the detection positions within the different organs. Then, to decrease the number of detection positions, the organ contribution to the effective dose is studied. Finally, the characteristics of the detectors to insert and the characteristics of the phantom to use are deduced. The results show that 24 or 23 detection positions , according to the wT values (publication 60 or new recommendations of the ICRP), give a E estimation with an uncertainty of ±15 % from 50 keV to 4 MeV. Moreover, the interest of such an instrument is underlined while comparing the E estimation by the personal dose equivalent Hp to the E estimation by the instrumented phantom when the phantom is irradiated by point sources (worker in front of a glove box for example). Last, after the detector and phantom characteristic determination, two types of detectors and one type of phantom are selected. However, for the detectors mainly, developments are necessary. Follow up this study, the characterization and the adaptation of the detectors to the project would be interesting. Furthermore, the study to mixed photon-neutrons would be required the needs of the radiological protection community.
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