• Title/Summary/Keyword: Radioactive environment

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A Study on Effective Management Scheme for Soil and Groundwater Contaminated by Radioactive Materials Due to Nuclear Accidents (원전사고에 따른 토양.지하수 방사성오염의 효과적인 관리 연구)

  • Kim, Hee-Joo;Hyun, Yun-Jung;Kim, Young-Ju;Hwang, Sang-Il
    • Journal of Soil and Groundwater Environment
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    • v.16 no.6
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    • pp.113-121
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    • 2011

  • In this study, we suggested the management scheme of analyzing the national and oversea related policy against soil and groundwater contamination by radioactive materials due to nuclear accidents. In Korea, we need to remedy swiftly the contaminated land due to intensive land development demand. So, we need to develop more effective management scheme to recover actively the land contaminated by radioactive materials. We require to improve monitoring network, to expand media-specific monitoring system, to prepare management system for remediation of contaminated land, and to develop flow work for soil and groundwater remediation.

  • https://doi.org/10.7857/JSGE.2011.16.6.113 인용 PDF KSCI

Effect of the Repository Configuration on Radionuclide Transport with the Multi-compartment Model for the LILW Repository Performance

  • Park, Jin-Beak;Park, Joo-Wan;Kim, Chang-Lak;Joonhong Ahn;Daisuke Kawasaki
    • Proceedings of the Korean Radioactive Waste Society Conference
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    • 2004.06a
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    • pp.228-228
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    • 2004

  • Nuclear Environment Technology Institute (KHNP-NETEC) developed the conceptual design of the low and intermediate-level radioactive waste (LILW) repository. Among many engineering challenges, it is of particular importance to find out an optimum arrangement of near-surface disposal vaults in the repository area to minimize the radionuclide flux and concentration at the interface between the geo-sphere and bio-sphere. (omitted)

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Disposal Approach for Long-lived Low and Intermediate-Level Radioactive Waste (장반감기 중저준위 방사성 폐기물의 국외 처분동향과 처분방안)

  • Park, Jin-Beak;Park, Joo-Wan;Kim, Chang-Lak
    • Proceedings of the Korean Radioactive Waste Society Conference
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    • 2005.11a
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    • pp.143-152
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    • 2005

  • There certainly exists the radioactive inventory that exceeds the waste acceptance criteria for final disposal of the low and intermediate-level radioactive waste. In this paper, current disposal status of the long-lived radioactive waste in several nations are summarized and the basic procedures for disposal approach are suggested. With this suggestion, intensive discussion and research activities can hopefully be launched to set down the possible resolutions to dispose of the long-lived radioactive waste.

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Autonomous exploration for radioactive sources localization based on radiation field reconstruction

  • Xulin Hu;Junling Wang;Jianwen Huo;Ying Zhou;Yunlei Guo;Li Hu
    • Nuclear Engineering and Technology
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    • v.56 no.4
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    • pp.1153-1164
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    • 2024

  • In recent years, unmanned ground vehicles (UGVs) have been used to search for lost or stolen radioactive sources to avoid radiation exposure for operators. To achieve autonomous localization of radioactive sources, the UGVs must have the ability to automatically determine the next radiation measurement location instead of following a predefined path. Also, the radiation field of radioactive sources has to be reconstructed or inverted utilizing discrete measurements to obtain the radiation intensity distribution in the area of interest. In this study, we propose an effective source localization framework and method, in which UGVs are able to autonomously explore in the radiation area to determine the location of radioactive sources through an iterative process: path planning, radiation field reconstruction and estimation of source location. In the search process, the next radiation measurement point of the UGVs is fully predicted by the design path planning algorithm. After obtaining the measurement points and their radiation measurements, the radiation field of radioactive sources is reconstructed by the Gaussian process regression (GPR) model based on machine learning method. Based on the reconstructed radiation field, the locations of radioactive sources can be determined by the peak analysis method. The proposed method is verified through extensive simulation experiments, and the real source localization experiment on a Cs-137 point source shows that the proposed method can accurately locate the radioactive source with an error of approximately 0.30 m. The experimental results reveal the important practicality of our proposed method for source autonomous localization tasks.

  • https://doi.org/10.1016/j.net.2023.11.020 인용 PDF