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KMID : 1151820190130010073
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Journal of the Korean Society of Radiology
2019 Volume.13 No. 1 p.73 ~ p.80
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Radiological Impact Assessment for Radioactive Concrete in Dismantling of the Medical Cyclotron
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Jang Dong-Gun
Shin Sang-Hwa
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Abstract
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Neutrons are generated by the nuclear reaction, which is absorbed into the concrete wall and causes the activation during cyclotron operation. The purpose of this study is to investigate the effect of neutron activation and radiative concrete on concrete type. This experiment used Monte Carlo simulation and RESRAD model. The results of the experiment showed that the higher the content of Fe in concrete, the greater the shielding rate. The effect of 56Fe(n, 2np)54Mn reaction on workers is also increased. However, radioactive nuclides have low activity and have very low impact on workers. Radioactive concrete should be treated as general wastes with less than its self-disposal tolerance level, and it should be recycled to the surface such as road repair rather than landfill to minimize the effect of 14C.
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KEYWORD
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Cyclotron, Activation, Concrete
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