Calculation of radiation shielding for megavoltage Gamma ray facility using Monte Carlo Code EGSnrc

Abstract

This study applies the Monte Carlo simulation method EGSnrc Code with two dedicated codes: BEAMnrc code is used to simulate the beam emitted from the accelerator head and DOSXYZnrc code is used to calculate the dose emitted from the accelerator. From there, evaluate the beam attenuation of radiation emitted from the accelerator through the layers of shielding material. Initial study results showed that dose limited at staff area (area Control) is 0,11 mSv/ week (5,5 mSv / year) and in the public area (area Uncontrol) is 0,022 mSv/week (1,1 mSv/year). Initial research results show that the effectiveness of the application of the EGSnrc simulation program with two specialized codes, BEAMnrc and DOSXYZnrc, shows that the radiation dose in the study area for medical staff is safe, within the allowable limits