Comparison of X-Ray Machines Radiation Exposure Rates in Enclosed Facilities using Monte Carlo Simulation Rio Natanael Wijaya, Rico Zaky Zakaria, Zaenal Abidin
Polytechnic Institute of Nuclear Technology
Abstract
To ensure the health and safety of operators and users, radiation exposure of X-Ray machines need to be periodically controlled. Radiation exposure calculation can be performed using deterministic methods (direct measurement) and stochastic methods (random sampling simulation). Radiation exposure calculations using deterministic method are often inconvenient, take a lot of time, and prone to human errors. That^s why random sampling is a convenient alternative. Random sampling is an appropriate method to measure radiation exposure due to the stochastic nature of radiation. Monte Carlo is one of such method. Enacting simulation using Monte Carlo is very convenient, but we need to be sure that the simulation result reflects the real measurement. This paper discusses about the comparision between direct measurement of two kinds of X-Ray machines and Monte Carlo simulation. Due to time constraint, the measurement was carried out within a voltage of 140 until 160 kV at the current of 5 mA. The radiation exposure was measured outside of four walls surrounding the machine. It was found the error are within 10% for certain walls, but there are some simulation result that are outside of expectation.
Keywords: Monte Carlo Simulation, Radiation Exposure Rate, X-Ray
