Radiation Monitoring

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Tatsuo Torii - One of the best experts on this subject based on the ideXlab platform.

  • Flight demonstration of Unmanned Airplane for Radiation Monitoring System with preview path-tracking controller
    2016 American Control Conference (ACC), 2016
    Co-Authors: Masayuki Sato, Koji Muraoka, Koki Hozumi, Yukihisa Sanada, Tsutomu Yamada, Tatsuo Torii
    Abstract:

    In 2011, Fukushima Dai-ichi nuclear power plant received a severe damage from the Great East Japan Earthquake, and spread massive radioactive contaminants. Due to this tragedy, the necessity of unmanned Radiation Monitoring system has been increasing in Japan. Therefore, Japan Aerospace Exploration Agency (JAXA) and Japan Atomic Energy Agency (JAEA) have been jointly developing Unmanned Airplane for Radiation Monitoring System, in short UARMS, as one of such systems. The basic flight controller of UARMS was designed and the usefulness of UARMS has already been well illustrated by demonstration flight in Fukushima; however path-tracking controller has been required for precise Monitoring because Radiation Monitoring is planned to be conducted not only in town areas but also in mountain areas. To this end, the path-tracking controller is designed as a preview controller with its gains being optimized off-line by using multiple model approach for robust control performance. Demonstration flight was conducted in Fukushima to confirm the integrity of the designed preview path-tracking controller.

  • Radiation Monitoring using an unmanned helicopter in the evacuation zone around the fukushima daiichi nuclear power plant
    Exploration Geophysics, 2014
    Co-Authors: Yukihisa Sanada, Atsuya Kondo, Takeshi Sugita, Yukiyasu Nishizawa, Youichi Yuuki, Kazutaka Ikeda, Yasunori Shoji, Tatsuo Torii
    Abstract:

    The Great East Japan Earthquake that occurred on 11 March 2011 generated a series of large tsunami waves that caused serious damage to the Fukushima Daiichi nuclear power plant, following which a large amount of radioactive material was discharged from the nuclear power plant into the environment. In recent years, technologies for unmanned helicopters have been developed and applied in various fields. In expectation of the application of unmanned helicopters in airborne Radiation Monitoring, in this study we developed a Radiation Monitoring system for aerial use. We then measured the Radiation level by using unmanned helicopters in areas where the soil had been contaminated by radioactive caesium emitted from the nuclear power plant to evaluate the ambient dose rate distribution around the site. We found that in dry riverbeds near the nuclear power plant, the dose rate was higher than that in the surrounding areas. The results of our measurements show that Radiation Monitoring using this system was useful in measuring radioactivity in contaminated areas.

  • a remote Radiation Monitoring system using an autonomous unmanned helicopter for nuclear emergencies
    Journal of Nuclear Science and Technology, 2008
    Co-Authors: Shinichi Okuyama, Tatsuo Torii, Akihiko Suzuki, Masanori Shibuya, Nobuyuki Miyazaki
    Abstract:

    A feasibility study of a remote Radiation Monitoring system using an autonomous unmanned helicopter, mounted with a Radiation detector and three CCD cameras, was carried out for surveying the dose-rate distribution of environmental Radiation. This system can fly to destinations and return under automatic operation, measure Radiation data during flight, and immediately transmit the data, including images, to a Monitoring station on the ground. It is also possible to monitor the data on a map on a computer display in real time. Flight tests confirmed that the system can measure fluctuations of dose-rate distribution on the ground, and could be used for Radiation Monitoring in case of a nuclear emergency.

  • development of a remote Radiation Monitoring system using unmanned helicopter
    International Congress Series, 2005
    Co-Authors: Shinichi Okuyama, Tatsuo Torii, Yasunori Nawa, Ikuo Kinoshita, Akihiko Suzuki, Masanori Shibuya, Nobuyuki Miyazaki
    Abstract:

    Abstract Feasibility study of a remote Radiation Monitoring system using an autonomous unmanned helicopter, mounted the CCD cameras, the GPS sensor and a Radiation detector, has been carried out as measures in a nuclear emergency and for surveying high Radiation area in the environment. This system can fly for the destinations and return by the automatic operation, and the Radiation data can be collected during the flight. Radiation data measured are transmitted immediately with image data to the Monitoring station on the ground. It is possible to monitor these data on the map of the computer display in the real time. As a result of the flight tests, it is confirmed that the fluctuation of the dose-rate distribution on the ground is measured by this system, and it can be used for the Radiation Monitoring in case of a nuclear emergency.

Yukihisa Sanada - One of the best experts on this subject based on the ideXlab platform.

  • Flight demonstration of Unmanned Airplane for Radiation Monitoring System with preview path-tracking controller
    2016 American Control Conference (ACC), 2016
    Co-Authors: Masayuki Sato, Koji Muraoka, Koki Hozumi, Yukihisa Sanada, Tsutomu Yamada, Tatsuo Torii
    Abstract:

    In 2011, Fukushima Dai-ichi nuclear power plant received a severe damage from the Great East Japan Earthquake, and spread massive radioactive contaminants. Due to this tragedy, the necessity of unmanned Radiation Monitoring system has been increasing in Japan. Therefore, Japan Aerospace Exploration Agency (JAXA) and Japan Atomic Energy Agency (JAEA) have been jointly developing Unmanned Airplane for Radiation Monitoring System, in short UARMS, as one of such systems. The basic flight controller of UARMS was designed and the usefulness of UARMS has already been well illustrated by demonstration flight in Fukushima; however path-tracking controller has been required for precise Monitoring because Radiation Monitoring is planned to be conducted not only in town areas but also in mountain areas. To this end, the path-tracking controller is designed as a preview controller with its gains being optimized off-line by using multiple model approach for robust control performance. Demonstration flight was conducted in Fukushima to confirm the integrity of the designed preview path-tracking controller.

  • Radiation Monitoring using an unmanned helicopter in the evacuation zone around the fukushima daiichi nuclear power plant
    Exploration Geophysics, 2014
    Co-Authors: Yukihisa Sanada, Atsuya Kondo, Takeshi Sugita, Yukiyasu Nishizawa, Youichi Yuuki, Kazutaka Ikeda, Yasunori Shoji, Tatsuo Torii
    Abstract:

    The Great East Japan Earthquake that occurred on 11 March 2011 generated a series of large tsunami waves that caused serious damage to the Fukushima Daiichi nuclear power plant, following which a large amount of radioactive material was discharged from the nuclear power plant into the environment. In recent years, technologies for unmanned helicopters have been developed and applied in various fields. In expectation of the application of unmanned helicopters in airborne Radiation Monitoring, in this study we developed a Radiation Monitoring system for aerial use. We then measured the Radiation level by using unmanned helicopters in areas where the soil had been contaminated by radioactive caesium emitted from the nuclear power plant to evaluate the ambient dose rate distribution around the site. We found that in dry riverbeds near the nuclear power plant, the dose rate was higher than that in the surrounding areas. The results of our measurements show that Radiation Monitoring using this system was useful in measuring radioactivity in contaminated areas.

Eduardo B Farfan - One of the best experts on this subject based on the ideXlab platform.

  • environmental Radiation Monitoring in the chernobyl exclusion zone history and results 25 years after
    Health Physics, 2011
    Co-Authors: M D Bondarkov, Boris Ya Oskolkov, S Gaschak, Sergey I Kireev, Andrey M Maksimenko, Nikolai I Proskura, Timothy G Jannik, Eduardo B Farfan
    Abstract:

    This article describes results of the Radiation environmental Monitoring performed in the Chernobyl Exclusion Zone (ChEZ) during the period following the 1986 Chernobyl Nuclear Power Plant accident. This article presents a brief overview of five comprehensive reports generated under Contract No. DE-AC09-96SR18500 (Washington Savannah River Company LLC, Subcontract No. AC55559N, SOW No. ON8778) and summarizes characteristics of the ChEZ and its post-accident status and the history of development of the Radiation Monitoring research in the ChEZ is described. This article addresses characteristics of the Radiation Monitoring in the ChEZ, its major goals and objectives, and changes of these goals and objectives in the course of time, depending on the tasks associated with the phase of mitigation of the ChNPP accident consequences. The results of the Radiation Monitoring in the ChEZ during the last 25 years are also provided.

Nobuyuki Miyazaki - One of the best experts on this subject based on the ideXlab platform.

  • a remote Radiation Monitoring system using an autonomous unmanned helicopter for nuclear emergencies
    Journal of Nuclear Science and Technology, 2008
    Co-Authors: Shinichi Okuyama, Tatsuo Torii, Akihiko Suzuki, Masanori Shibuya, Nobuyuki Miyazaki
    Abstract:

    A feasibility study of a remote Radiation Monitoring system using an autonomous unmanned helicopter, mounted with a Radiation detector and three CCD cameras, was carried out for surveying the dose-rate distribution of environmental Radiation. This system can fly to destinations and return under automatic operation, measure Radiation data during flight, and immediately transmit the data, including images, to a Monitoring station on the ground. It is also possible to monitor the data on a map on a computer display in real time. Flight tests confirmed that the system can measure fluctuations of dose-rate distribution on the ground, and could be used for Radiation Monitoring in case of a nuclear emergency.

  • development of a remote Radiation Monitoring system using unmanned helicopter
    International Congress Series, 2005
    Co-Authors: Shinichi Okuyama, Tatsuo Torii, Yasunori Nawa, Ikuo Kinoshita, Akihiko Suzuki, Masanori Shibuya, Nobuyuki Miyazaki
    Abstract:

    Abstract Feasibility study of a remote Radiation Monitoring system using an autonomous unmanned helicopter, mounted the CCD cameras, the GPS sensor and a Radiation detector, has been carried out as measures in a nuclear emergency and for surveying high Radiation area in the environment. This system can fly for the destinations and return by the automatic operation, and the Radiation data can be collected during the flight. Radiation data measured are transmitted immediately with image data to the Monitoring station on the ground. It is possible to monitor these data on the map of the computer display in the real time. As a result of the flight tests, it is confirmed that the fluctuation of the dose-rate distribution on the ground is measured by this system, and it can be used for the Radiation Monitoring in case of a nuclear emergency.

James Gibson - One of the best experts on this subject based on the ideXlab platform.

  • the usda ultraviolet Radiation Monitoring program
    Bulletin of the American Meteorological Society, 1998
    Co-Authors: David S Bigelow, James R Slusser, Arthur F Beaubien, James Gibson
    Abstract:

    Abstract The U.S. Department of Agriculture's Ultraviolet (UV) Radiation Monitoring Program has been measuring UV Radiation since 1994. The initial network of 12 stations employed broadband meters to measure UVB irradiance and included ancillary measurements of temperature, humidity, and irradiance at seven wavelengths in the visible produced by a Multi-Filter Rotating Shadowband Radiometer (MFRSR). Since that beginning the network has expanded to more than 20 stations and the broadband meters have been supplemented with a seven-wavelength Ultraviolet Multi-Filter Rotating Shadowband Radiometer (UV-MFRSR). The network has been designed to include 30 stations, each with a full complement of instrumentation. Annual characterizations of the network's filter radiometers indicate that gradual shifts in instrument response are manageable but must be accounted for to achieve accurate and precise measurements of UV irradiance. The characterization and calibration of the filter instruments is discussed along with ...