Generation mechanism and simulation of the radioactive aerosols using nuclear reactor and/or accelerator
| Project/Area Number |
26286076
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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 |
Quantum beam science
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| Research Institution | Kyoto University |
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Principal Investigator |
Ohtsuki Tsutomu 京都大学, 複合原子力科学研究所, 教授 (50233193)
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| Co-Investigator(Kenkyū-buntansha) |
関本 俊 京都大学, 複合原子力科学研究所, 助教 (10420407)
沖 雄一 京都大学, 複合原子力科学研究所, 准教授 (40204094)
高宮 幸一 京都大学, 複合原子力科学研究所, 准教授 (70324712)
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| Research Collaborator |
KASAMATSU Yoshitaka
TANAKA Toru
MNITTA Shin-nosuke
ITOSU Satoshi
NISHIZAWA Yusuke
FUTAGAMI Fumiya
SATO Mamoru
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| Project Period (FY) |
2014-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2015: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
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| Keywords | 原発事故 / 放射性微粒子 / 放射性エアロゾル / 核分裂生成物 / 環境放射能 / 事故時シミュレーション / 環境の移り変わり / 放射性セシウム / 粒子生成模擬実験 / 福島原発事故 / 放射性物質 / エアロゾル / 環境汚染 / セシウムボール / 化学形態 / 福島県の環境 / 放射性クラスター / ナノ粒子 / エアロゾル製造装置 / 原子力発電事故 / 原子力発電所事故 |
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| Outline of Final Research Achievements |
Various characteristics such as size distribution, chemical component and radioactivity have been analyzed for small particles and radioactive aerosols released from Fukushima Daiichi Nuclear Power Plant. The size distribution and/or elements were investigated by SEM-EDX and TIMS etc. Next for radioactive aerosols in simulated experiments, the measured radioactive aerosols suggest that the potential transport medium for radioactive cesium was non-sea-salt sulfate. This result indicates that cesium and other isotopes would preferentially attach with sulfate compounds. In the present work, the attachment behavior of fission products to aqueous solution aerosols of sodium salts etc. has been studied using a generation system of solution aerosols and spontaneous fission source of Cf-252 etc.
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| Academic Significance and Societal Importance of the Research Achievements |
福島第一原子力発電所から放出された放射性エアロゾルや微粒子は複雑系の中での環境への移行であると考えられるが、ここでは実際に環境中の微粒子の化学的組成等を調べることと、実験室中での単純な放射性エアロゾルや微粒子の生成機構から環境中のエアロゾル生成モデルの基礎データを取得することを目的とした。放射性微粒子の性状や溶液エアロゾルの成長に関して、その種類や密度・濃度に着目し、核分裂生成物が物質に付着し、放射性エアロゾルや微粒子が生成するメカニズムの解明を試みた。その結果から実際の環境系と比較しながら事故直後の状況から現在、そして未来予測までの知見を得ることの基礎データが得られた。
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Report
(6 results)
Research Products
(50 results)
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[Journal Article] A new detector system for the measurement of high-energy prompt gamma-rays for low-energy neutron induced fission2018
Author(s)
H. Makii, K. Nishio, K. Hirose, R. Orlandi, R. Leguillon, T. Ogawa, T. Soldner, F.-J. Hambsch, M. Aiche, A. Astier e, S. Czajkowski, R. Frost, S. Guo, U. Koster, L. Mathieu, T. Ohtsuki, C.M. Petrache, A. Pollitt, S. Sekimoto, K. Takamiya, I. Tsekhanovich
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Journal Title
Nuclear Instruments and Methods in Physics Research A
Volume: 906
Pages: 88-96
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Simultaneous measurement of neutron-induced fission and capture cross sections for 241Am at neutron energies below fission threshold.2017
Author(s)
K. Hirose, K. Nishio, H. Makii, I Nishinaka, S. Ota, T. Nagayama, N. Tamura, S. Goto, A. Andreyev, M. Vermeulen, S. Gilespie, C. Barton, A. Kimura, H. Harada, S. Meigo, S Chiba, T. Ohtsuki.
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Journal Title
Nuclear Instr. And Meth. A
Volume: 856
Pages: 133-138
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Role of Multichance Fission in the Description of Fission-Fragment Mass Distributions at High Energies2017
Author(s)
K. Hirose, K. Nishio, S. Tanaka, R. Leguillon, H. Makii, I Nishinaka, R. Orlandi, K. Tsukada, J. Smallcombe, M.J. Vermeulen, S Chiba, Y. Aritomo, T. Ohtsuki, K. Nakano, S. Araki, Y. Watanabe, R. Tatsuzawa, N. Takaki, N. Tamura, S. Goto, I. Tse khanovi ch, A.N. Andreyev
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Journal Title
Physical Review Letters
Volume: 119
Issue: 22
Pages: 222501-222501
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Study of F ission Using Multi-Nuceon T ransfer Re actions.2017
Author(s)
K. Nishio, K. Hirose, V. Mark, H. Makii, R. Orlandi, K. Tsukada, M. Asai, A. Toyoshima, T. K. Sato, Y. Nagame, S. Chiba, Y. Aritomo, S. Tanaka, T. Ohtsuki, I. Tsekhanovich, C. M. Petrache, A. Andreyev
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Journal Title
EPJ Web of Conferences
Volume: 163
Pages: 00041-00041
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Experimental fission study using multi-nucleon transfer reactions2017
Author(s)
K. Nishio, K. Hirose, R. Leguillon, H. Makii, R. Orlandi, K. Tsukada, J. Smallcombe, S. Chiba, Y. Aritomo, S. Tanaka, T. Ohtsuki, I. Tsekhanovich, C. M. Petrache, A. Andreyev
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Journal Title
EPJ Web of Conferences
Volume: 146
Pages: 04009-04009
NAID
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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