Development of a Real-Time Environmental Radiation Dose Evaluation System for the Vicinity of a Nuclear Facility

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概要

• 論文の詳細を見る

• A computer code system has been developed to evaluate the environmental radiological impact of accidental releases of radionuclides from a nuclear facility in real time. The system is based on a three-dimensional mass-conserving wind field model and a particle dispersion model with a nesting function in order to calculate the atmospheric dispersion of radio-nuclides with high spatial resolution in the vicinity of the facility. Input includes on-line local meteorological and effluent data at 10-min intervals, as observed and monitored at the site of the facility, and hourly local meteorological data as predicted by an atmospheric dynamic model. Contour maps and tables of internal and external doses are the output. The performance of the system was validated using environmental monitoring data for the air absorbed dose rate as observed at monitoring stations and monitoring posts around the Tokai Reprocessing Plant when <85>^Kr was discharged during its operation, based on the safety regulations. The observed increase of the dose rate was simulated well. The agreement of calculated and observed dose rate was within a factor of 2 for 42% of observations, and within a factor of 5 for 74%.

• 日本保健物理学会の論文

著者

• TAKEISHI Minoru

  Radiation Protection Department, Nuclear Fuel Cycle Engineering Laboratories, Tokai Research and Dev

• Iida Takao

  Department Of Nuclear Engineering Faculty Of Engineering Nagoya University

• Iida Takao

  Graduate School Of Engineering Nagoya University

• TAKEYASU Masanori

  Radiation Protection Division, Tokai Works, Japan Nuclear Cycle Development Institute

• SHIMIZU Takehiko

  Health and Safety Division,. O-arai Engineering Center, Japan Nuclear Cycle Development Institute

• Shimizu Takehiko

  Health And Safety Division . O-arai Engineering Center Japan Nuclear Cycle Development Institute

• Takeyasu Masanori

  Radiation Protection Division Tokai Works Japan Nuclear Cycle Development Institute

• Takeishi Minoru

  Radiation Protection Department Nuclear Fuel Cycle Engineering Laboratories Tokai Research And Devel

• Takeishi Minoru

  Radiation Protection Division Tokai Works Japan Nuclear Cycle Development Institute

関連論文

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• Development of a Real-Time Environmental Radiation Dose Evaluation System for the Vicinity of a Nuclear Facility
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• Modeling Radon Flux Density from the Earth's Surface
• Effects of Atmospheric Transport on Temporal Variations of ^Rn and Its Progeny Concentration in the Atmosphere
• Measurements of Thoron Concentration by Passive Cup Method and Its Application to Dose Assessment
• Suppression of Radon Exhalation from Soil by Covering with Clay-mixed Soil
• Development of Three-Dimensional Numerical Model for ^Rn and its Decay Products Coupled with a Mesoscale Meteorological Model I. Model Description and Validation

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