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http://dx.doi.org/10.7742/jksr.2021.15.4.415

Evaluating Activation for 50 MeV Cyclotron Irradiation Service using Monte Carlo Method and Inventory Code  

Kim, Sangrok (Radiation Safety Section, Korea Institute of Radiological and Medical Sciences)
Kim, Gi-sub (Radiation Safety Section, Korea Institute of Radiological and Medical Sciences)
Heo, Jaeseung (Radiation Safety Section, Korea Institute of Radiological and Medical Sciences)
Ahn, Yunjin (Radiation Safety Section, Korea Institute of Radiological and Medical Sciences)
Publication Information
Journal of the Korean Society of Radiology / v.15, no.4, 2021 , pp. 415-427 More about this Journal
Abstract
Korea Institute of Radiological and Medical Sciences has provided various beam irradiation services to researchers using a 50 MeV cyclotron beam line. In particular, since the neutron beam service uses the nuclear reaction between protons and beryllium, the possibility of activation of the irradiated sample increases by using a high current. In this study, MCNP 6.2 and FISPACT-II 4.0 were used to evaluate the possible activation during the 35 MeV 20 ㎂ neutron beam service, which is preferred by the researchers. As a result of the calculation, if the iron, copper, and tungsten samples were irradiated for more than 1 hour, long-lived radioisotopes were produced and their radioactivity exceeded the standard level for self-disposal. Under the conditions of 2 hours of daily irradiation, no activation occurred in the building materials, and the internal exposure of workers due to air activation inside the irradiation room was very insignificant. And when this air was discharged to environment, the radioactivity including this air was also satisfied the emission standard.
Keywords
Radiation; Activation; Monte Carlo simulation; Inventory code; MCNP; FISPACT;
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