Makoto I. Kobayashi, N. Suzuki, T. Saze, H. Miyake, K. Nishimura, H. Hayashi, T. Kobuchi, K. Ogawa, M. Isobe, M. Osakabe
1),2) In this study, the application of a simple measurement method using NaI(Tl) scintillation survey-meter to detect the gamma-rays in the armor tiles of LHD vacuum vessel exposed to fast neutrons during deuterium plasma experiments was evaluated to control the occupational exposure for the storage of huge numbers of the armor tiles. The gamma-ray spectrometry for an activated armor tile by high-purity germanium detector (HPGe) showed the gamma-ray peaks from 58 Co, 54 Mn and 60 Co. The detection efficiencies of these nuclides for HPGe were evaluated by PHITS to estimate the concentrations of these nuclides. The radiation transport model for HPGe in PHITS were validated by the gamma-ray measurements for sealed gamma-ray sources. Then, the detection efficiencies of these nuclides for NaI(Tl) scintillation survey-meter were also evaluated by the same manner using PHITS. The predicted dose rate of the activated armor tiles in NaI(Tl) scintillation survey-meter was consistent with the actual measurement. The predicted count rate in NaI(Tl) scintillation survey-meter for 60 Co, which will be a deterministic nuclide in the armor tile due to longer half-life, in the clearance level was sufficiently higher than the minimum detectable count rate of NaI(Tl) scintillation survey-meter with a simple shielding for environmental radiation.
{"title":"The Evaluation of a Simple Measurement Method using NaI(Tl) Scintillation Survey-Meter for Radiation Safety Management of Radioactivated Armor Tiles of LHD Vacuum Vessel","authors":"Makoto I. Kobayashi, N. Suzuki, T. Saze, H. Miyake, K. Nishimura, H. Hayashi, T. Kobuchi, K. Ogawa, M. Isobe, M. Osakabe","doi":"10.12950/rsm.210416","DOIUrl":"https://doi.org/10.12950/rsm.210416","url":null,"abstract":"1),2) In this study, the application of a simple measurement method using NaI(Tl) scintillation survey-meter to detect the gamma-rays in the armor tiles of LHD vacuum vessel exposed to fast neutrons during deuterium plasma experiments was evaluated to control the occupational exposure for the storage of huge numbers of the armor tiles. The gamma-ray spectrometry for an activated armor tile by high-purity germanium detector (HPGe) showed the gamma-ray peaks from 58 Co, 54 Mn and 60 Co. The detection efficiencies of these nuclides for HPGe were evaluated by PHITS to estimate the concentrations of these nuclides. The radiation transport model for HPGe in PHITS were validated by the gamma-ray measurements for sealed gamma-ray sources. Then, the detection efficiencies of these nuclides for NaI(Tl) scintillation survey-meter were also evaluated by the same manner using PHITS. The predicted dose rate of the activated armor tiles in NaI(Tl) scintillation survey-meter was consistent with the actual measurement. The predicted count rate in NaI(Tl) scintillation survey-meter for 60 Co, which will be a deterministic nuclide in the armor tile due to longer half-life, in the clearance level was sufficiently higher than the minimum detectable count rate of NaI(Tl) scintillation survey-meter with a simple shielding for environmental radiation.","PeriodicalId":350737,"journal":{"name":"Radiation Safety Management","volume":"248 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122727432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nittaya Wakai, J. Yamashita, T. Enomoto, T. Hanafusa, T. Ono, M. Maeda
{"title":"Factors affecting 137Cs concentration in wild plants and soils of different land use in Iitate village after the Fukushima nuclear power plant accident","authors":"Nittaya Wakai, J. Yamashita, T. Enomoto, T. Hanafusa, T. Ono, M. Maeda","doi":"10.12950/RSM.180918","DOIUrl":"https://doi.org/10.12950/RSM.180918","url":null,"abstract":"","PeriodicalId":350737,"journal":{"name":"Radiation Safety Management","volume":"52 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120979231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Triyono Basuki, W. Bekelesi, Masaya Tsujimoto, S. Nakashima
In the present study, we reported the investigation of radiocesium migration from steep slope surrounding catchment to water body based on the radiocesium distribution and soil to sediment ratio. It was confirmed that the radiocesium was derived from the Fukushima accident by considering the 134 Cs to 137 Cs ratio corrected to the released day which is about 1. We found the higher radiocesium inventory in higher elevation area and steep slope forest catchment, revealing the atmospheric dry initial deposition-derived radiocesium and high retention of the forest zone. The radiocesium distribution data revealed that the radiocesium migrated more from the transition zone to the water body than from forest catchment, and accumulated in the deeper layer of sediment. The lower value of 137 Cs soil to sediment ratio provided an evidence of radiocesium migration from the catchment and its accumulation in the sediment. The physicochemical property of surface soil was revealed as one of the possible factors of radiocesium high retention in forest catchment.
{"title":"Investigation of Radiocesium Migration from Land to Waterbody using Radiocesium Distribution and Soil to Sediment Ratio: A Case of the Steep Slope Catchment Area of Ogi Reservoir, Kawauchi Village, Fukushima","authors":"Triyono Basuki, W. Bekelesi, Masaya Tsujimoto, S. Nakashima","doi":"10.12950/rsm.190924","DOIUrl":"https://doi.org/10.12950/rsm.190924","url":null,"abstract":"In the present study, we reported the investigation of radiocesium migration from steep slope surrounding catchment to water body based on the radiocesium distribution and soil to sediment ratio. It was confirmed that the radiocesium was derived from the Fukushima accident by considering the 134 Cs to 137 Cs ratio corrected to the released day which is about 1. We found the higher radiocesium inventory in higher elevation area and steep slope forest catchment, revealing the atmospheric dry initial deposition-derived radiocesium and high retention of the forest zone. The radiocesium distribution data revealed that the radiocesium migrated more from the transition zone to the water body than from forest catchment, and accumulated in the deeper layer of sediment. The lower value of 137 Cs soil to sediment ratio provided an evidence of radiocesium migration from the catchment and its accumulation in the sediment. The physicochemical property of surface soil was revealed as one of the possible factors of radiocesium high retention in forest catchment.","PeriodicalId":350737,"journal":{"name":"Radiation Safety Management","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121995851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Toyoshima, Kojiro Nagata, K. Ooe, Zijian Zhang, Takumi Ikeda, Soichiro Ichimura, Honoka Obata, T. Yoshimura, A. Shinohara
The dispersal rates of 211 At, which is a promising nuclide for targeted alpha therapy, from aqueous solutions and chloroform were studied to provide experimental evidence for the reasonable evaluation of its airborne concentration in a radiation-controlled area. Using a collection unit for dispersed 211 At during ventilation, radioactivity of the trapped 211 At was quantified. The dispersal rates of 211 At in chloroform as well as acidic, neutral, and alkaline solutions, in addition to a neutral solution containing ascorbic acid, were determined. Thin-layer chromatography was also performed to identify the formed chemical species of 211 At. The dispersal rate of 211 At was very low in the neutral solution containing ascorbic acid and in chloroform. The chemical forms of 211 At in aqueous solutions are also briefly discussed.
{"title":"Dispersal rates of astatine-211 from aqueous solutions and chloroform","authors":"A. Toyoshima, Kojiro Nagata, K. Ooe, Zijian Zhang, Takumi Ikeda, Soichiro Ichimura, Honoka Obata, T. Yoshimura, A. Shinohara","doi":"10.12950/rsm.190423","DOIUrl":"https://doi.org/10.12950/rsm.190423","url":null,"abstract":"The dispersal rates of 211 At, which is a promising nuclide for targeted alpha therapy, from aqueous solutions and chloroform were studied to provide experimental evidence for the reasonable evaluation of its airborne concentration in a radiation-controlled area. Using a collection unit for dispersed 211 At during ventilation, radioactivity of the trapped 211 At was quantified. The dispersal rates of 211 At in chloroform as well as acidic, neutral, and alkaline solutions, in addition to a neutral solution containing ascorbic acid, were determined. Thin-layer chromatography was also performed to identify the formed chemical species of 211 At. The dispersal rate of 211 At was very low in the neutral solution containing ascorbic acid and in chloroform. The chemical forms of 211 At in aqueous solutions are also briefly discussed.","PeriodicalId":350737,"journal":{"name":"Radiation Safety Management","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116605763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
H. Matsumura, G. Yoshida, A. Toyoda, K. Masumoto, Hajime Nakamura, T. Miura, K. Nishikawa, K. Bessho, T. Akita, S. Katsuta, T. Akimoto, Y. Sugama, F. Nobuhara, Yoko Nagashima
{"title":"Investigation of Concrete Radioactivation in Cyclotron Type Proton Therapy Facilities using in situ 24Na Measurement Method","authors":"H. Matsumura, G. Yoshida, A. Toyoda, K. Masumoto, Hajime Nakamura, T. Miura, K. Nishikawa, K. Bessho, T. Akita, S. Katsuta, T. Akimoto, Y. Sugama, F. Nobuhara, Yoko Nagashima","doi":"10.12950/rsm.200909","DOIUrl":"https://doi.org/10.12950/rsm.200909","url":null,"abstract":"","PeriodicalId":350737,"journal":{"name":"Radiation Safety Management","volume":"264 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117102584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Masaya Tsujimoto, S. Miyashita, H. Nguyen, S. Nakashima
Monthly fieldwork was conducted in the paddies of Fukushima Prefecture in 2016, to obtain samples of the paddy soil and rice plants. The monthly change in the radioactivity concentrations of 137 Cs, 134 Cs, and 40 K of the samples was investigated, using a germanium semiconductor detector. Three-phase transfer factors (TFs) of 137 Cs from the paddy soil to the roots (TF 1 ), from the roots to the leaves (TF 2 ), and from the leaves to the ears (TF 3 ) of rice plants were calculated. The results showed that the radioactivity concentration of 137 Cs and 134 Cs in the paddy soil varied seasonally, while the concentration of 40 K showed an almost opposite seasonal change compared to 137 Cs and 134 Cs. The radioactivity concentration of 137 Cs and 134 Cs in the roots increased 60 days after planting, while the concentration of 40 K decreased. Furthermore, the radioactivity concentration of 137 Cs, 134 Cs, and 40 K in the leaves and ears decreased over time. Correlations of the TFs of 137 Cs with the radioactivity concentration of 40 K suggested that 137 Cs and 40 K were competitively absorbed by the roots, however, they were transported to the leaves and ears in the same manner. In conclusion, the transportation of 137 Cs (TF 2 and TF 3 ) in rice plants was high despite the low absorption of 137 Cs (TF 1 ) in the early stage of rice growth. Therefore, it is recommended that the potassium concentration in the paddy should be high during the early stage of growth to prevent radioactive cesium contamination.
{"title":"Monthly Change in Radioactivity Concentration of 137Cs, 134Cs, and 40K of Paddy Soil and Rice Plants in Fukushima Prefecture","authors":"Masaya Tsujimoto, S. Miyashita, H. Nguyen, S. Nakashima","doi":"10.12950/rsm.181219","DOIUrl":"https://doi.org/10.12950/rsm.181219","url":null,"abstract":"Monthly fieldwork was conducted in the paddies of Fukushima Prefecture in 2016, to obtain samples of the paddy soil and rice plants. The monthly change in the radioactivity concentrations of 137 Cs, 134 Cs, and 40 K of the samples was investigated, using a germanium semiconductor detector. Three-phase transfer factors (TFs) of 137 Cs from the paddy soil to the roots (TF 1 ), from the roots to the leaves (TF 2 ), and from the leaves to the ears (TF 3 ) of rice plants were calculated. The results showed that the radioactivity concentration of 137 Cs and 134 Cs in the paddy soil varied seasonally, while the concentration of 40 K showed an almost opposite seasonal change compared to 137 Cs and 134 Cs. The radioactivity concentration of 137 Cs and 134 Cs in the roots increased 60 days after planting, while the concentration of 40 K decreased. Furthermore, the radioactivity concentration of 137 Cs, 134 Cs, and 40 K in the leaves and ears decreased over time. Correlations of the TFs of 137 Cs with the radioactivity concentration of 40 K suggested that 137 Cs and 40 K were competitively absorbed by the roots, however, they were transported to the leaves and ears in the same manner. In conclusion, the transportation of 137 Cs (TF 2 and TF 3 ) in rice plants was high despite the low absorption of 137 Cs (TF 1 ) in the early stage of rice growth. Therefore, it is recommended that the potassium concentration in the paddy should be high during the early stage of growth to prevent radioactive cesium contamination.","PeriodicalId":350737,"journal":{"name":"Radiation Safety Management","volume":"331 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126568543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Kaneda-Nakashima, Zijian Zhang, Kojiro Nagata, K. Shirasaki, H. Kikunaga, T. Yamamura, K. Ooe, T. Watabe, A. Toyoshima, T. Yoshimura, A. Shinohara
The dispersions of short-lived radionuclides emitting a -particles, such as 223 Ra, 211 At, and 225 Ac, during animal experiments were measured for radiation safety management. These three radionuclides dispersed from mice were trapped using charcoal-impregnated filters, and those in feces were collected directly, and those in urine were recovered with bedding in a breeding cage. For all the radionuclides, uptakes by tissues were also further examined after dissection. The radioactivity of each radionuclide was evaluated with a g -ray scintillation counter using daughter nuclide. In tumor bearing mice, 211 At and 223 Ra accumulated in tumor tissues with high affinity and less accumulated in other tissues. It was noted that all the three radionuclides were not exhausted or evaporated from the breeding cages and the peak of excretions of the radionuclides in the animal experiments was observed within twenty-four hours.
{"title":"Dispersion of Alpha-Nuclides during Animal Experiments","authors":"K. Kaneda-Nakashima, Zijian Zhang, Kojiro Nagata, K. Shirasaki, H. Kikunaga, T. Yamamura, K. Ooe, T. Watabe, A. Toyoshima, T. Yoshimura, A. Shinohara","doi":"10.12950/rsm.210519","DOIUrl":"https://doi.org/10.12950/rsm.210519","url":null,"abstract":"The dispersions of short-lived radionuclides emitting a -particles, such as 223 Ra, 211 At, and 225 Ac, during animal experiments were measured for radiation safety management. These three radionuclides dispersed from mice were trapped using charcoal-impregnated filters, and those in feces were collected directly, and those in urine were recovered with bedding in a breeding cage. For all the radionuclides, uptakes by tissues were also further examined after dissection. The radioactivity of each radionuclide was evaluated with a g -ray scintillation counter using daughter nuclide. In tumor bearing mice, 211 At and 223 Ra accumulated in tumor tissues with high affinity and less accumulated in other tissues. It was noted that all the three radionuclides were not exhausted or evaporated from the breeding cages and the peak of excretions of the radionuclides in the animal experiments was observed within twenty-four hours.","PeriodicalId":350737,"journal":{"name":"Radiation Safety Management","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132321417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
To support the safe return of residents after the TEPCO Fukushima Daiichi Nuclear Power Plant accident, cleaning methods and materials for the removal of radiocesium (Cs) from household surfaces were compared. A spot contaminated with Cs on a vinyl floor sheet or a glass plate was wiped in different moisture conditions with different cleaning materials, including a paper sheet, cellulose sponge, polyester sheet, and a polyesterpolyamide sheet. Radioactive solid particles on a vinyl sheet were wiped with miniature mops made of cellulose sponge, polyester microfiber, or cotton yarn. There was little difference in the removal of radioactivity among cleaning materials when the contaminated spot was wiped in wet conditions. The removal of contaminated particles depended on the structure of the mop. The use of an abrasive and a detergent worked well for the vinyl sheet and the glass plate, respectively. These observations suggested that, in appropriate conditions, effective decontamination was achievable by regular indoor cleaning with commercially available cleaning devices.
{"title":"Cleaning Materials and Methods for Effective Removal of Indoor Radioactive Contamination","authors":"T. Takemoto, K. Ohsawa, N. Matsuda","doi":"10.12950/rsm.200213","DOIUrl":"https://doi.org/10.12950/rsm.200213","url":null,"abstract":"To support the safe return of residents after the TEPCO Fukushima Daiichi Nuclear Power Plant accident, cleaning methods and materials for the removal of radiocesium (Cs) from household surfaces were compared. A spot contaminated with Cs on a vinyl floor sheet or a glass plate was wiped in different moisture conditions with different cleaning materials, including a paper sheet, cellulose sponge, polyester sheet, and a polyesterpolyamide sheet. Radioactive solid particles on a vinyl sheet were wiped with miniature mops made of cellulose sponge, polyester microfiber, or cotton yarn. There was little difference in the removal of radioactivity among cleaning materials when the contaminated spot was wiped in wet conditions. The removal of contaminated particles depended on the structure of the mop. The use of an abrasive and a detergent worked well for the vinyl sheet and the glass plate, respectively. These observations suggested that, in appropriate conditions, effective decontamination was achievable by regular indoor cleaning with commercially available cleaning devices.","PeriodicalId":350737,"journal":{"name":"Radiation Safety Management","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134398450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Yoshida, H. Matsumura, Hajime Nakamura, A. Toyoda, K. Masumoto, T. Miura, K. Sasa, T. Moriguchi
To establish a systematic guideline for accelerator decommissioning, as a case study, beamline activation of 12 MeV-proton electrostatic accelerator was investigated employing a survey meter and g -ray spectrometers. Beam loss points where reflected as high dose-rate area were identified, and generated nuclides and their activities were determined. Almost beamline components are made from stainless steel and 52 Mn and 56 Co were detected as principal induced activities. It was found that the 56 Co activity significantly contribute to the dose rate value denoted on the survey meter. From the beam operation history and the monitor currents of Faraday-cups, we revealed the beam loss on a certain point significantly reflects the 52 Mn activity on there. Induced activities of 52 Mn and 56 Co on the certain point of the beamline could be reproduced by the contact dose-rate on that point.
{"title":"Survey Methodology for the Activation of Beamline Components in an Electrostatic Proton Accelerator","authors":"G. Yoshida, H. Matsumura, Hajime Nakamura, A. Toyoda, K. Masumoto, T. Miura, K. Sasa, T. Moriguchi","doi":"10.12950/RSM.200813","DOIUrl":"https://doi.org/10.12950/RSM.200813","url":null,"abstract":"To establish a systematic guideline for accelerator decommissioning, as a case study, beamline activation of 12 MeV-proton electrostatic accelerator was investigated employing a survey meter and g -ray spectrometers. Beam loss points where reflected as high dose-rate area were identified, and generated nuclides and their activities were determined. Almost beamline components are made from stainless steel and 52 Mn and 56 Co were detected as principal induced activities. It was found that the 56 Co activity significantly contribute to the dose rate value denoted on the survey meter. From the beam operation history and the monitor currents of Faraday-cups, we revealed the beam loss on a certain point significantly reflects the 52 Mn activity on there. Induced activities of 52 Mn and 56 Co on the certain point of the beamline could be reproduced by the contact dose-rate on that point.","PeriodicalId":350737,"journal":{"name":"Radiation Safety Management","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116402746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Yamamura, K. Shirasaki, H. Kikunaga, Kojiro Nagata, Zijian Zhang, K. Washiyama, A. Toyoshima, T. Yoshimura, A. Shinohara
1) Laboratory of Alpha-ray Emitters, Institute for Materials Research, Tohoku University, Miyagi 980-8577, Japan 2) Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka 590-0494, Japan 3) Research Center for Electron Photon Science, Tohoku University, Miyagi 982-0826, Japan 4) Radioisotope Research Center, Institute for Radiation Sciences, Osaka University, Osaka 565-0871, Japan 5) Department of Chemistry, Graduate School of Science, Osaka University, Osaka 560-0043, Japan 6) Advanced Clinical Research Center, Fukushima Medical University, Fukushima 960-1295, Japan 7) Division of Science, Institute for Radiation Sciences, Osaka University, Osaka 560-0043, Japan
{"title":"Transfer Rates of 225Ac to Exhaust Air, Surface, and Waste Water under Chemical Operations","authors":"T. Yamamura, K. Shirasaki, H. Kikunaga, Kojiro Nagata, Zijian Zhang, K. Washiyama, A. Toyoshima, T. Yoshimura, A. Shinohara","doi":"10.12950/rsm.191219","DOIUrl":"https://doi.org/10.12950/rsm.191219","url":null,"abstract":"1) Laboratory of Alpha-ray Emitters, Institute for Materials Research, Tohoku University, Miyagi 980-8577, Japan 2) Institute for Integrated Radiation and Nuclear Science, Kyoto University, Osaka 590-0494, Japan 3) Research Center for Electron Photon Science, Tohoku University, Miyagi 982-0826, Japan 4) Radioisotope Research Center, Institute for Radiation Sciences, Osaka University, Osaka 565-0871, Japan 5) Department of Chemistry, Graduate School of Science, Osaka University, Osaka 560-0043, Japan 6) Advanced Clinical Research Center, Fukushima Medical University, Fukushima 960-1295, Japan 7) Division of Science, Institute for Radiation Sciences, Osaka University, Osaka 560-0043, Japan","PeriodicalId":350737,"journal":{"name":"Radiation Safety Management","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124160015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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