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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:19 |
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Conference: Bucharest University Faculty of Physics 2009 Meeting
Section: Polymer Physics
Title:
Assessment of individual exposure to external sources of radiation using personal photographic dosimeters
Authors:
Margareta CHERESTEŞ1, Codruţ CHERESTEŞ1, Mircea-Valentin PARASCHIVA1, Livia Maria CONSTANTINESCU2
Affiliation:
1 - DOZIMED Ltd, 405 Atomiştilor St., 077125 Măgurele, România
2 - Faculty of Physics, University of Bucharest, PO Box MG-11, Măgurele, Bucharest
E-mail
codrut.cherestes@dozimed.ro
Keywords:
photographic dosimeters, dose assessment
Abstract:
Operational monitoring programmes have the main objective the assessment of workplace conditions and individual exposure. The assessment of doses to workers routinely or potentially exposed to external sources of radiation constitutes an integral part of any radiation protection programme and helps to ensure acceptably safe and radiological conditions in the workplace.
Photographic dosimeter it was used for assessment of ionizing radiation doses of occupational exposed personnel. The operational dosimetric quantity for individual monitoring is the personal dose equivalent.
A set of such photographic dosimeters was irradiated at doses ranging between 0,10 mSv and 20 mSv and the optical density of the films was represented function of dose logarithm. The irradiation energy dependency of the film response was studied by irradiating the films at five different energies in range of 50 ÷ 300 keV and 0.5 ÷ MeV.
The estimated results confirm the strong dependency of dosimeter response with mean irradiation energy.
There was evaluated the precision of photographic dosimeter dose measurement, taking into account that the main influencing factors are the energy and the temperature. There was established that the dosimeter response is in the tolerated errors limit:
where f is:
f = 1,5 for 4mSv < Hp(10) < 10Sv
f = 2 for Hp(10) < 0,4 mSv.
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