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Estimation of the Time of Cesium Leaking by Moisture Absorption of Radiologically Contaminated Municipal Solid Waste Incinerator Fly Ash

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/78764

Title: Estimation of the Time of Cesium Leaking by Moisture Absorption of Radiologically Contaminated Municipal Solid Waste Incinerator Fly Ash
Authors: Ichikawa, Tsuneki Browse this author →KAKEN DB
Yamada, Kazuo Browse this author
Osako, Masahiro Browse this author
Keywords: Municipal solid waste incinerator fly ash
Fukushima Daiichi Nuclear Power Plant accident
Radioactive cesium leaking
Deliquescent salts
Moisture absorption
Issue Date: Sep-2017
Publisher: 環境放射能除染学会
Journal Title: 環境放射能除染学会誌
Journal Title(alt): Journal of the Society for Remediation of Radioactive Contamination in the Environment
Volume: 5
Issue: 3
Start Page: 201
End Page: 214
Abstract: For estimating the time of cesium leaking from municipal solid waste incinerator fly ash (MSWI FA) containing deliquescent salts and radioactive cesium that had been released by Fukushima Daiichi Nuclear Accident, the rate of moisture absorption of MSWI FA from the atmosphere was measured by changing temperature, relative humidity, bulk density, the contents of CaCl₂, NaCl, KCl and pre-absorbed water, and the shape and the structure of the container. The experimental results were summarized with simple mathematical equations which enable one to determine the time period for the leaking from MSWI FA stored in a container under varying temperature and humidity. It was found that the leaking starts when all the pores in the FA are filled with an aqueous solution generated by the moisture absorption, and the time of the leakage is possible to be estimated by solving a simple diffusion equation. The estimated time was more than 11 years for one cubic meter of MSWI FA stored in an air-permeable flexible container under the field condition near Fukushima Daiichi nuclear power plants.
Type: article
URI: http://hdl.handle.net/2115/78764
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 市川 恒樹

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