Radiation Safety Assessment of the New Neutron Radiography System at Tehran Research Reactor
Recently, a new Neutron Radiography (NR) beam line has been designed, constricted, installed and tested based on the use of E-beam tube of Tehran Research Reactor (TRR). Initial tests have been shown that the system can be used for different samples and purposes such as nuclear plates and rods fuels. For this end the system need a suitable irradiation room which should be installed at the NR beam port. The present work is the analyses of the proposed irradiation room in view of irradiation safety. To do this, using MCNPX Monte Carlo code the proposed room structure and neutron beam catcher have been simulated and then neutron/gamma dose have been calculated at different locations around the room walls. The results show that the designed room and beam catcher have good performance in case of reduce the total neutron and gamma dose to 10 μSv/h which is desired value in view of radiation protection issue.
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