The contamination monitor and the dose rate meter are nowadays an indispensable part of the equipment used for the detection of ionizing radiation. The aforementioned monitor and meter are available for professional use at the Department of
Nuclear Medicine at the University Medical Centre Ljubljana. Employees are exposed to radiation on a daily basis, so it is all the necessary to ensure its proper functioning. The legislation dictates annual validation and testing of the monitors and meters, but not the exact implementation of the quality assurance programme for the contamination monitors and dose rate meters. After reviewing the literature and the international recommendations, we (a physics student, a medical physics expert and a technical engineer) drew up a plan to ensure the quality of portable equipment intended for the measurement of ionizing radiation. This includes tests
designed to verify the constancy and linearity of the response of the contamination monitor and the dose rate meter. Multiple radioactive sources with diffrent activities were used, they were decided upon after reviewing the literature. With the
help of the tests, we found that not all measuring equipment meets the prescribed recommendations, as there are significant deviations.
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