Radiation Safety Management最新文献

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 用NaI(Tl)闪烁测量仪对LHD真空容器放射性护甲瓦辐射安全管理的简单测量方法评价

Radiation Safety Management Pub Date : 1900-01-01 DOI: 10.12950/rsm.210416

Makoto I. Kobayashi, N. Suzuki, T. Saze, H. Miyake, K. Nishimura, H. Hayashi, T. Kobuchi, K. Ogawa, M. Isobe, M. Osakabe

{"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}

引用次数: 1

Factors affecting 137Cs concentration in wild plants and soils of different land use in Iitate village after the Fukushima nuclear power plant accident 福岛核电站事故后Iitate村不同土地利用方式野生植物和土壤中137Cs浓度的影响因素

Radiation Safety Management Pub Date : 1900-01-01 DOI: 10.12950/RSM.180918

Nittaya Wakai, J. Yamashita, T. Enomoto, T. Hanafusa, T. Ono, M. Maeda

引用次数: 2

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 利用放射性分布和土沙比研究放射性从陆地向水体的迁移——以福岛川内村Ogi水库陡坡集水区为例

Radiation Safety Management Pub Date : 1900-01-01 DOI: 10.12950/rsm.190924

Triyono Basuki, W. Bekelesi, Masaya Tsujimoto, S. Nakashima

{"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}

引用次数: 2

Investigation of Characteristics of Low-energy X-ray Radiated from the Crookes Tube Used in Radiological Education 用于放射学教育的克鲁克斯管低能x射线辐射特性的研究

Radiation Safety Management Pub Date : 1900-01-01 DOI: 10.12950/RSM.190201

D. D. Khiem, H. Ando, H. Matsuura, M. Akiyoshi

引用次数: 2

Dispersal Rate of Radon-219 from Aqueous Radium-223 Solution Containing Sodium Chloride/Citrate 氡-219在含氯化钠/柠檬酸盐的镭-223水溶液中的扩散速率

Radiation Safety Management Pub Date : 1900-01-01 DOI: 10.12950/rsm.190328

Kojiro Nagata, K. Shirasaki, A. Toyoshima, K. Ooe, T. Yamamura, A. Shinohara, T. Yoshimura

引用次数: 4

Dispersal rates of astatine-211 from aqueous solutions and chloroform 砹-211在水溶液和氯仿中的扩散速率

Radiation Safety Management Pub Date : 1900-01-01 DOI: 10.12950/rsm.190423

A. Toyoshima, Kojiro Nagata, K. Ooe, Zijian Zhang, Takumi Ikeda, Soichiro Ichimura, Honoka Obata, T. Yoshimura, A. Shinohara

引用次数: 5

Investigation of Concrete Radioactivation in Cyclotron Type Proton Therapy Facilities using in situ 24Na Measurement Method 用24Na原位测量法研究回旋型质子治疗设备中混凝土的放射性

Radiation Safety Management Pub Date : 1900-01-01 DOI: 10.12950/rsm.200909

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

引用次数: 0

Monthly Change in Radioactivity Concentration of 137Cs, 134Cs, and 40K of Paddy Soil and Rice Plants in Fukushima Prefecture 福岛县水稻土壤和水稻137Cs、134Cs和40K放射性浓度的月变化

Radiation Safety Management Pub Date : 1900-01-01 DOI: 10.12950/rsm.181219

Masaya Tsujimoto, S. Miyashita, H. Nguyen, S. Nakashima

{"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}

引用次数: 3

Dispersion of Alpha-Nuclides during Animal Experiments α -核素在动物实验中的分散

Radiation Safety Management Pub Date : 1900-01-01 DOI: 10.12950/rsm.210519

K. Kaneda-Nakashima, Zijian Zhang, Kojiro Nagata, K. Shirasaki, H. Kikunaga, T. Yamamura, K. Ooe, T. Watabe, A. Toyoshima, T. Yoshimura, A. Shinohara

引用次数: 0

Cleaning Materials and Methods for Effective Removal of Indoor Radioactive Contamination 有效清除室内放射性污染的清洁材料和方法

Radiation Safety Management Pub Date : 1900-01-01 DOI: 10.12950/rsm.200213

T. Takemoto, K. Ohsawa, N. Matsuda

引用次数: 0