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http://dx.doi.org/10.7742/jksr.2019.13.1.73

Radiological Impact Assessment for Radioactive Concrete in Dismantling of the Medical Cyclotron  

Jang, Donggun (Department of Nuclear Medicine, Dongnam Institute of Radiological & Medical Sciences Cancer center)
Shin, Sanghwa (Department of Radiological Science, College of Health Sciences, Catholic University of Pusan)
Publication Information
Journal of the Korean Society of Radiology / v.13, no.1, 2019 , pp. 73-80 More about this Journal
Abstract
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 $^{56}Fe(n,\;2np)^{54}Mn$ 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 $^{14}C$.
Keywords
Cyclotron; Activation; Concrete;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 IAEA, Decommissioning of Medical, Industrial and Research Facilities, No. WS-G-2.2, 1999.
2 D. G. Jang, "Evaluation of the Safety of Workers through Analysis of the Neutron Activation of the PET Cyclotron," Master. diss., Catholic University of Pusan, 2017.
3 Korea Atomic Energy Research Institute, "Radiation Shielding Technology Development for Proton Linear Accelerator," KAERI/RR-2583, 2005.
4 Ministry of Environment, Wastes control Act, Article 3, 2017.
5 J. K. Dickens, C. Y. Fu, D. M. Hetrick, D. C. Larson, J. H. Todd, "Experimental and Calculated Excitation Functions for Discrete-Line Gamma-Ray Production due to 1-40 MeV Neutron Interactions with $^{56}Fe$," Nuclear Data for Science and Technology, pp. 13-17, 1991.
6 W. Davis, "Carbon-14 production in nuclear reactors," U.S. Nuclear Regulatory Commission, 1977.
7 Korea Atomic Energy Research Institute, "Internal and external dose conversion coefficient for domestic reference animals and plant," KAERI/TR-3767, 2009.
8 United Nations Scientific Committee on the Effects of Atomic Radiation, "Sources and Effects of Ionizing Radiation," UNSCEAR 2008 Report Vol. I, 2010.
9 E. O. Lawrence, "The Production of high speed light ions without use of high voltages," Physical Review, Vol. 40, No. 1, pp. 19-35, 1932.   DOI
10 IAEA, "Directory of Cyclotrons used for Radionuclide Production in Member States-2006 Update," IAEA-DCRP, 2006.
11 R. Barquero, R. Mendez, J. M. Marti-Climent, et al., "Monte carlo neutron doses estimatios inside a pet cyclotron vault room," Radiation Protection Dosimetry, Vol. 126, No. 1-4, pp. 477-481, 2007.   DOI
12 IAEA, "Cyclotron produced radionuclides. principles and practice," IAEA Technical Report Series 465, 2008.
13 The Korean Society of Nuclear Medicine, "Nuclear medicine scan statistics," 2017
14 Korea Institute of Nuclear Safety, "Development of advanced technology for evaluation and verification of radiation safety," KINS-RR-1027, 2013.
15 Korea Institute of Nuclear Safety, "Analytical evaluation of domestic operational reality for cyclotron and internal and external facility dismantling standard," KINS/HR-1269, 2013.
16 J. H. Lee, "Development of reduction technique and evaluation of radioactive concrete waste in cyclotron. facility," Master. diss., University of Hanyang, 2016.
17 D.G. Jang, D.Y. Lee, J. H. Kim, "Radioactivation Analysis of Concrete Shielding Wall of Cyclotron Room Using Monte Carlo Simulation," The Korean Society of Radiology, Vol. 11, No. 5 pp. 335-341, 2017.
18 B. C. Lee, H. I. Kim, "Shielding Technology, for High Energy Radiation Production Facility," Korea Atomic Energy Research Institute, 2004.
19 Nuclear Safety and Security Commission, Act on Standards for design approval and inspection of radiation devices, Article 16. 2018.
20 A. Ferrari, P. R. Sala, A. Fasso, et al., "FLUKA: a multi-particle transport code," CERN 2005-10 INFN/TC_05/11, SLAC-R-773. 2005.
21 Nuclear Safety and Security Commission, Act on Regulations on classification of radioactive waste and criteria for self-disposal, Article 6, 2017.