Simulation of TLD-700 (Lif; Mg, Ti) for Determination of Hp Equivalent Dose (10) on Radiation Workers (Gamma) with MCNPX Approach

Aisyah Dianing Pradipta, Sugeng Rianto, Bunawas Bunawas

Abstract


Radiation workers are required to monitor radiation doses to reduce the effects of ionizing radiation on the body. The Government through BAPETEN establishes a maximum equivalent dose for workers of 20 mSv / yr. One of the most widely used personal monitoring tools is the TLD-700 (especially for gamma radiation). The equivalent dose in the body of the radiation worker for a depth of 10 mm (Hp (10)) can be estimated through the MCNPX simulation approach. To perform the simulation, geometric model inputs are adapted to the geometry of the experiments. Simulation results at the perpendicular source position obtained the dose rate of 8.565mSv / h, which showed a difference of 1.5% on the experimental results, so that the dosage of Hp (10) can be determined. In this study also can simulate for the position of source 137Cs contamination on the floor that can not be done experimentally. Estimated through simulation, the dose rate on the floor is 14,920 mSv / hour. These results show the difference in dose rate to source perpendicular by 75% greater than the direction perpendicular. Based on these results it is necessary to calibrate TLD-700 for the position of the source from the lower direction. Due to the greater the dose rate (from the lower direction), the greater the dose of Hp (10) received. The MCNPX is therefore potentially used to estimate the HP personal dose (10) for radiation workers, particularly in cases of radiation accidents.


Keywords


Dosage of Hp (10); MCNPX; TLD-700

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