High Radon Emanation Coefficients of Porous Matters Produced through Filtration and Precipitation
スポンサーリンク
概要
- 論文の詳細を見る
Previous theoretical predictions of high radon emanation coefficients were verified in experiments using porous matters artificially produced through filtration and precipitation. Such porous matters were prepared by replicating uranium-bearing waste generating processes used in fuel fabrication facilities in Japan except that radium was employed instead of uranium. In the replication, a liquid containing a trace amount of naturally occurring radium was processed by filtration or precipitation, resulting in radium adsorption on the surfaces of the matrices used as agents for the processing. The matrices were diatomaceous earth for filtration and iron (III) hydroxide for precipitation. Radon emanation coefficients of these matrices were measured and proved to be very high as expected from the authors’ previous theoretical calculations which predicted that chemical procedures like filtration or precipitation could lead to very high radon emanation coefficients. Filtration and precipitation are the most common processes employed in chemical industries. Therefore, the present study also provides important information on radon emanation coefficients for workers in those chemical industries which handle substances containing naturally occurring radium. The findings further imply that man-made artificial industrial products containing naturally occurring radium should be distinguished from ubiquitous minerals, rocks and soils containing naturally occurring radium from a radiological exposure viewpoint, because the radon emanation coefficients of the former are generally higher than those of the latter.
- 一般社団法人 日本原子力学会の論文
- 2008-06-01
著者
-
SASAKI Tomozo
Radioactive Waste Management Funding and Research Center
-
Sasaki Tomozo
Radioactive Waste Management Funding And Res. Center
-
Gunji Yasuyoshi
Nuclear Fuel Industries Ltd.
関連論文
- Theoretical Basis for Measuring Small Radon Diffusion Coefficients for a Radium-Bearing Porous Material Generated by Precipitation of Iron (III) Hydroxide
- Transient-Diffusion Measurements of Radon : Fick's Law Confirmation and ^Po/^Po Behavior Determination
- Transient-Diffusion Measurements of Radon : Practical Interpretation of Measured Data
- High Radon Emanation Coefficients of Porous Matters Produced through Filtration and Precipitation
- Radon Emanation Phenomena : A Probabilistic Basis to Estimate Radon Emanation Coefficients Based on Its Zigzag Travel
- Decontamination of Sludgelike Uranium-Bearing Wastes : Decontamination Feasibility Judgment Using Radon Emanation Coefficients and Development of Decontamination Methods
- Theoretical Estimation of Radon Emanation Coefficients for UO_2 Particles Deposited on Surfaces of Uranium-bearing Wastes
- Transient-Diffusion Measurement of Radon in Japanese Soils from a mathematical Viewpoint
- Theoretical Study of High Radon Emanation
- Radon Emanation Dependence on Grain Configuration
- Demonstration of a Method to Suppress Radon Emanation from Uranium-bearing Wastes
- Mathematical Modeling of Radon Emanation
- Theoretical basis for measuring small radon diffusion coefficients for a radium-bearing porous material generated by precipitation of iron (3) hydroxide
- Transient-Diffusion Measurement of Radon in Japanese Soils from a mathematical Viewpoint