How radioactive aerosol taken into human body by inhalation does affect human?
Project/Area Number |
16K15368
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Research Category |
Grant-in-Aid for Challenging Exploratory Research
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Allocation Type | Multi-year Fund |
Research Field |
Hygiene and public health
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Research Institution | Hirosaki University |
Principal Investigator |
Tokonami Shinji 弘前大学, 被ばく医療総合研究所, 教授 (80247254)
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Project Period (FY) |
2016-04-01 – 2019-03-31
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Project Status |
Completed (Fiscal Year 2018)
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Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
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Keywords | ラドン / トロン / 放射性微粒子 / 吸入摂取 / 内部被ばく / 健康影響 / 放射線 |
Outline of Final Research Achievements |
It is well-known that radon (Rn-222) is a secondary risk factor of lung cancer after smoking. Most of the lung dose by inhalation is due to radon progenies rather than radon itself. When radon progeny is inhaled into human body such as lung (temperature: 37℃, relative humidity: 100%), the characteristics of it will be changing. This fact may affect the internal dose assessment. However, there is no radioactive-aerosol exposure chamber reproducing the respiratory tract environment in the world. In this study, the exposure chamber using radioactive aerosols was developed for evaluation of the physical change of radioactive aerosols in the respiratory tract environment.
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Academic Significance and Societal Importance of the Research Achievements |
放射性微粒子の吸入による被ばく線量はその粒子径により沈着部位が異なるため、線量評価の際には大気中の粒子径分布を考慮する必要がある。しかし、粒子径を制御できる放射性微粒子の曝露環境が世界中でもほとんどないことから、放射性微粒子の呼吸気道への沈着を実測により評価された例は少ない。粒子径、温度及び湿度を制御可能な放射性粒子の曝露場を構築することにより、放射性微粒子の呼吸気道内への沈着の実態解明に繋がることが期待される。また、放射性微粒子の較正場としても有用であり、福島第一原子力発電所の廃炉に伴う作業者の内部被ばく管理で重要となる測定器の較正及び性能評価にも利用可能である。
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Report
(4 results)
Research Products
(54 results)
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[Journal Article] Comparative Study of Performance using Five Different Gamma-ray Spectrometers for Thyroid Monitoring under Nuclear Emergency Situations.2019
Author(s)
Hosoda M, Iwaoka K, Tokonami S, Tamakuma Y, Shiroma Y, Fukuhara T, Imajyo Y, Taniguchi J, Akata N, Osanai M, Tsujiguchi T, Yamaguchi M, Kashiwakura I
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Journal Title
Health Phys
Volume: 116
Issue: 1
Pages: 81-87
DOI
Related Report
Peer Reviewed / Open Access
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[Presentation] Dose variation measurement at the high background radiation area in Indonesia2018
Author(s)
Michiya Sasaki, Ryohei Yamada, Naofumi Akata, Shinji Tokonami, Masahiro Hosoda, Kazuki Iwaoka, Chanis Pornnumpa, Hiromi Kudo, Kumar Sahoo, Dadong Iskandar, Eko Pudjadi
Organizer
9th International Conference on High Level Environmental Radiation Areas (ICHLERA2018)
Related Report
Int'l Joint Research
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[Presentation] Evaluation of a radon air moniter as a measurement of radon concentration in water in comparison with a liquied scintillation counter2018
Author(s)
Shoko Higuchi, Yuuki Kamishiro, Maki Ishihara, yumi Yasuoka, Yasunori Mori, Masahro hosoda, Kazuki Iwaoka, Shinji Tokonami, Miroslaw Janik, Jun Muto, Hiroyuki Nagahama, Takahiro Mukai
Organizer
9th International Conference on High Level Environmental Radiation Areas (ICHLERA2018)
Related Report
Int'l Joint Research
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[Presentation] High indoor radon concentration observed in Yomitan-son, Okinawa Prefecture, southwestern part of Japan2018
Author(s)
Masahide Furukawa, Yasutaka Omori, Reina Shingaki, Nagi Masuda, Mika Obata, Yuki Tamakuma, Takahito Suzuki, Shunya Nakasone, Akinobu Ishimine, Masahiro Hosoda, Naofumi Akata, Shinji Tokonami
Organizer
9th International Conference on High Level Environmental Radiation Areas (ICHLERA2018)
Related Report
Int'l Joint Research
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[Presentation] Overview of a new research project on dose assessment for residents of Namie Town, Fukushima Prefecture2018
Author(s)
S. Tokonami, Y. Shiroma, M. Hegedus, T. Tsujiguchi, M. Yamaguchi, H. Kudo, T. Suzuki, Y. Tamakuma, R. Yamada, K. Iwaoka, M. Hosoda, I. Kashiwakura, N. Akata
Organizer
VI. Terrestrial Radionuclides in Environment International Conference on Environmental Protection
Related Report
Int'l Joint Research
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[Presentation] Progress report of a new research project on dose assessment for residents of Namie Town, Fukushima Prefecture - Focused on radon research2018
Author(s)
M. Hosoda, Y. Tateyama, T. Suzuki, Y. Tamakuma, R. Yamada, K. Iwaoka, H. Kudo, Y. Shiroma, M. Hegedus, T. Tsujiguchi, M. Yamaguchi, I. Kashiwakura, S. Tokonami, N. Akata
Organizer
VI. Terrestrial Radionuclides in Environment International Conference on Environmental Protection
Related Report
Int'l Joint Research
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