Verification of Co-60 blood irradiator mechanical engineering design

Aim of this work is to verify the mechanical engineering design of the blood irradiator (from view of radiation protection) and estimation of the field homogeneity in the irradiation chamber. To estimate the radiation field around the blood irradiator a modeling approach have been chosen and Monte Carlo code MCNPX has been employed. Fluence-to-dose conversion factor from ICRP-74 have been used for the annual dose equivalent evaluation. With this results, the shielding analysis has been performed in the context of occupation factor at the service staff work place and the current legislation requirements. In homogeneity of the radiation field has been estimated on the basis of isodoses in the water phantom (imitate the irradiator object, e.g. blood unit) placed in the irradiation chamber.The results have been further discussed with regards to the additional optimization (cost, availability of a sufficient number of resources, etc.). (authors)