Analysis of Absorbed Dose in Vital Organs of Radiation Workers at Tehran Research Reactor (TRR) with the use of RANDO Phantom and TLD Method

In this work, using simulation in the working conditions for the radiation workers the gamma and high energy X-rays’- absorbed dose in the eye cornea, thyroid and testicles were measured by the RANDO phantom, TLD 100H (Li:Mg:P:Cu) dosimeters and Harshaw 4500 reader. The measurements were performed on pre-determined parts in both normal and emergency conditions. The result of this research indicates that the lower absorbed dose in various body parts of radiation workers in an ordinary working condition and in permissible areas is lower than the allowable absorbed  dose. Moreover, despite the fact that the irradiation level for the whole body and different body parts are 10 times more in restricted and prohibited areas, the absorbed dose is yet measured to be less than the allowable dose. However, incidences such as human error in discharging radioactive samples from the reactor pool can cause the whole body irradiation of a radiation worker to exceed the allowable dose of  20 mSv per year.