Analysis of activation products generated from photoneutron capture reactions inside a linear accelerator used in a cargo inspection facility

Activation products are generated from photoneutron capture reactions inside a linear accelerator (LINAC) used in a high energy X-ray cargo inspection facility. The activation products are estimated using MCNPX, Monte Carlo simulation code, in order to evaluate radiological safety in the facility. The result shows that the maximum radiation dose rate from the saturated activity in LINAC room is about 2.18E−06 Sv/h and 74-W-187 is the most significant radionuclide generated. It is, therefore, recommended that a proper measure to reduce the radionuclide is considered to protect occupational workers against the decay radiations.