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Iimoto, Takeshi,Hayashi, Rumiko,Kuroda, Reiko,Furusawa, Mami,Umekage, Tadashi,Ohkubo, Yasushi,Takahashi, Hiroyuki,Nakamura, Takashi The Korean Society of Safety 2011 International Journal of Safety Vol.10 No.2
Examples and experiences of risk management on radiation under prolonged exposure situation are shown. The accident of the Fukushima dai-ichi nuclear power plant after the great east Japan earthquake (11 March, 2011) elevates background level of environmental radiation around the east Japan. For example, ambient dose equivalent rate around Tohkatsu area next to Tokyo located about 200 km-south from the plant, is about 0.1-0.6 micro-Sv $h^{-1}$ mainly due to $^{134}Cs$ and $^{137}Cs$ falling on the ground soil. This level is about double or up to ten times higher than the genuine natural level around the area. International Commission on Radiological Protection (ICRP) recommends how to face the existing exposure situation; that is the prolonged exposure situation. Referring to ICRP's reports and/or related international/domestic documents, we have been discussing how to manage this situation and acting to gain safety and relief of public, who have a possibility to be exposed to prolonged lower-dose radiation. Here, we introduce our several experiences on risk management, especially focusing on risk communication, radiation education to public, and stakeholder involvements into decision making in local governments on radiation protection, relating to the accident.
Iimoto, Takeshi,Hayashi, Rumiko,Kuroda, Reiko,Furusawa, Mami,Umekage, Tadashi,Ohkubo, Yasushi,Takahashi, Hiroyuki,Nakamura, Takashi The Korean Society of Safety 2012 International Journal of Safety Vol.11 No.1
Examples and experiences of risk management on radiation under prolonged exposure situation are shown. The accident of the Fukushima dai-ichi nuclear power plant after the great east Japan earthquake (11 March, 2011) elevates background level of environmental radiation around the east Japan. For example, ambient dose equivalent rate around Tohkatsu area next to Tokyo located about 200 km-south from the plant, is about 0.1-0.6 micro-Sv $h^{-1}$ mainly due to $^{134}Cs$ and $^{137}Cs$ falling on the ground soil. This level is about double or up to ten times higher than the genuine natural level around the area. International Commission on Radiological Protection (ICRP) recommends how to face the existing exposure situation; that is the prolonged exposure situation. Referring to ICRP's reports and/or related international/domestic documents, we have been discussing and acting to gain public's safety and relief, who have a possibility to be exposed to prolonged lower-dose radiation. Here, we introduce our several experiences on risk management, especially focusing on risk communication, radiation education to public, and stakeholder involvements into making decision in local governments on radiation protection, relating to the accident.
( Takeshi Iimoto ),( Rumiko Hayashi ),( Reiko Kuroda ),( Mami Furusawa ),( Tadashi Umekage ),( Yasushi Ohkubo ),( Hiroyuki Takahashi ),( Takashi Nakamura ) 한국안전학회(구 한국산업안전학회) 2012 International Journal of Safety Vol.11 No.1
Examples and experiences of risk management on radiation under prolonged exposure situation are shown. The accident of the Fukushima dai-ichi nuclear power plant after the great east Japan earthquake (11 March, 2011) elevates background level of environmental radiation around the east Japan. For example, ambient dose equivalent rate around Tohkatsu area next to Tokyo located about 200 km-south from the plant, is about 0.1-0.6 micro-Sv h-1 mainly due to 134Cs and 137Cs falling on the ground soil. This level is about double or up to ten times higher than the genuine natural level around the area. International Commission on Radiological Protection (ICRP) recommends how to face the existing exposure situation; that is the prolonged exposure situation, Referring to ICRP`s reports and/or related international/domestic documents, we have been discussing and acting to gain public`s safety and relief, who have a possibility to be exposed to prolonged lower-dose radiation. Here, we introduce our several experiences on risk management, especially focusing on risk communication, radiation education to public, and stakeholder involvements into making decision in local governments on radiation protection, relating to the accident.
( Takeshi Iimoto ),( Rumiko Elayashi ),( Reiko Kuroda ),( Mami Furusawa ),( Tadashi Iimekage ),( Yasushi Ohkubo ),( Hiroyuki Takahashi ),( Takashi Nakamura ) 한국안전학회(구 한국산업안전학회) 2011 International Journal of Safety Vol.10 No.2
Examples and experiences of risk management on radiation under prolonged exposure situation are shown. The accident of the Fukushima dai-ichi nuclear power plant after the great east Japan earthquake (II March, 2011) elevates background level of environmental radiation around the east Japan. For example, ambient dose equivalent rate around Tohkatsu area next to Tokyo located about 200 km-south from the plant, is about 0.1-0.6 micro-Sv h-1 mainly due to 134Cs and 137Cs falling on the ground soil. This level is about double or up to ten times higher than the genuine natural level around the area. International Commission on Radiological Protection (ICRP) recommends how to face the existing exposure situation; that is the prolonged exposure situation. Referring to ICRP`s reports and/or related intemational/ domestic documents, we have been discussing how to manage this situation and acting to gain safety and relief of public, who have a possibility to be exposed to prolonged lower-dose radiation. Here, we introduce our several experiences on risk management, especially focusing on risk communication, radiation education to public, and stakeholder involvements into decision making in local governments on radiation protection, relating to the accident.
Miwa Kazuji,Iimoto Takeshi 대한방사선방어학회 2023 방사선방어학회지 Vol.48 No.2
Background : In the process of discussion on the possibility of using radionuclide-contaminated soil and debris generated by radiation disasters , a strategy for the proper management of radia- tion exposure protection while considering the source of the contaminated materials is neces- sary. JRPR Materials and Methods : The radiological protection criteria that are likely to be applied to the source-related approach based on the International Commission on Radiological Protection recommendations and the International Atomic Energy Agency safety standards are summa- rized . We proposed five interpretations of radiation protection to contribute to the promotion of discussion on the possibility of using a part of low-level-radionuclide-contaminated soil and de- bris in the post-accident rehabilitation . Interpretations I to III are based on the idea of “using a reference level to protect the public in post-accident rehabilitation ,” whereas IV and V are based on the idea of “using the dose constraint to protect the public in the post-accident rehabilitation when the sources are handled in a planned activity.” The former idea is subdivided into three based on the definition of the source , which is managed by the reference level , and the latter idea is divided into two depending on whether or not additional dose from using contaminated materials is deemed acceptable . Results and Discussion : To confirm the applicability of the five interpretations presented , we suggested the concrete values of protection criteria via two feasible cases . In this case study, we proposed radiation protection by the dose constraint based on the Interpretation IV and chose 1 mSv/yr for the public and 20 mSv/yr for workers dealing with radionuclide-contaminated ma- terials . Conclusion : We concretely and systematically demonstrated how the concept of radiation pro- tection can be applied to the process of discussion on the possibility of using radionuclide-con- taminated materials within the framework of an international system of protection . This study’s findings can provide necessary information to discuss the possibility of using radionuclide-con- taminated materials as an alternative option for recovery and reconstruction after a radiation di- saster from the viewpoint of radiation protection .