New development of study on atmospheric transport processes of environmental radioactivity
| Project/Area Number |
24360392
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Nuclear engineering
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| Research Institution | Nagoya University |
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Principal Investigator |
YAMAZAWA Hiromi 名古屋大学, 工学(系)研究科(研究院), 教授 (70345916)
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| Co-Investigator(Kenkyū-buntansha) |
MORIIZUMI Jun 名古屋大学, 大学院工学研究科, 准教授 (90303677)
HIRAO Shigekazu 名古屋大学, 大学院工学研究科, 助教 (30596060)
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| Research Collaborator |
HIROUCHI Jun
LIU Heng
KONDO Daisuke
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
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| Keywords | 放射性核種 / ラドン壊変生成物 / 湿性沈着 / 洗浄係数 / 降水中濃度 / 空間線量率 / 地面上濃度推定 / 放射性核種濃度 / 除去効率 / モデル化 / 放射性核種沈着 / 環境放射線モニタリング |
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| Outline of Final Research Achievements |
A series of measurements were carried out for concentrations of radon decay products in rain water with a high time resolution. Temporal variations in the measured concentration, which followed the variation in rain intensity, were analyzed to formulate the washout coefficient of air-borne radionuclides as a function of rain intensity. It was demonstrated that the temporal variations in concentration in rain water were reproduced with a very high accuracy by using the proposed formula.
Methods for estimating surface concentrations of deposited radionuclides from temporal change in dose rate and from gamma-ray spectral information provided from monitoring installations were developed.
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Report
(4 results)
Research Products
(20 results)
