Vol. 3, 2018

Original research papers

Radiation Measurements

MEASUREMENT OF AMBIENT DOSE EQUIVALENT H*(10) IN THE SURROUNDING OF NUCLEAR FACILITIES IN SERBIA

Aleksandra Sokić, Luka Perazić, Ivan Knežević

Pages: 42–46

DOI: 10.21175/RadProc.2018.09

In the Public Company Nuclear Facilities of Serbia, the measurement of the operational dosimetric quantity, ambient dose equivalent H*(10), is continuously carried out at measurement points in the surrounding of the radioactive waste storage facilities (hangars H1, H2 and H3) and old reactor buildings (RA and RB), located at Vinca site in Belgrade. For that purpose, two different types of passive dosimeters are used: thermoluminescent (TL) high sensitivity dosimeters (LiF:Mg,Cu,P) and optically stimulated luminescence (OSL) dosimeters (Al2O3). The principle of radiation interaction with both types of material is very similar, and the main difference is reflected in the method of detecting the light which is in relation to the dose in the dosimeter. The measurement of the ambient dose equivalent is performed at 34 measuring points in order to monitor the level of radiation exposure in the vicinity of the mentioned facilities. The paper shows the results of the measurements in the period from January to December of 2016. TL and OSL dosimeters were used and read once a month at the same time under the same measurement conditions. The aim of this paper is to present the comparative results of the ambient dose equivalent measurements using TL and OSL dosimeters and compare them with the measurement results of the reference instrument for measuring dose rate (Atomtex AT6101C spectrometer) at the same measuring points. It was found that the differences among the measurement results using different dosimeter types were satisfactory, with a maximum deviation of 35%. The results also show that there is no significant increase in the level of radiation exposure, which is of particular importance to the environment and the population around nuclear facilities in Serbia.
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