Effects of dose reduction on the product edges irradiated by Rhodotron TT-200 EB accelerator on the radiation processing parameters

In Radiation processing of products by high energy electrons, scattered electrons reduce at the edges of the product and the absorbed dose is low at this regions. Dose reduction in edges, affects some system parameters such as dose uniformity ratio, Energy utilization efficiency and mass throughput.In this paper,the 3-D dose distribution in the sample product was determined by MCNP computer code and experimental data were measured by CTA dosimeters. Calculated and measured data weredeterminedfor one-sided irradiation by TT-200 Rhodotron electron beam accelerator. Also the effect of dose reduction in the product edges on system parameters was investigated. Calculated and measured data were in a good agreement.The results indicate that the dose reduction in the edges of product decreases the minimum absorbed dose and consequently increases the dose uniformity ratio and reduces the efficiency in utilization of energy from 0.70 to 0.48. Also this effect decreases the mass throughput by a factor of 0.68.