Cresswell, A. , Kato, H., Onda, Y. and Nanba, K. (2016) Evaluation of forest decontamination using radiometric measurements. Journal of Environmental Radioactivity, 164, pp. 133-144. (doi: 10.1016/j.jenvrad.2016.07.024) (PMID:27458868)
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121372.pdf - Accepted Version 2MB |
Abstract
An experiment has been conducted to evaluate the additional dose reduction by clear felling contaminated forestry in Fukushima Prefecture, Japan, and using the timber to cover the areas with wood chips. A portable gamma spectrometry system, comprising a backpack containing a 3x3” NaI(Tl) detector with digital spectrometer and GPS receiver, has been used to map dose rate and radionuclide activity concentrations before, after and at stages during this experiment. The data show the effect of the different stages of the experiment on dose rate at different locations around the site. The spectrometric data have allowed the assessment of the contributions of natural and anthropogenic radionuclides to the dose rate at different parts of the site before and after the experiment. This has clearly demonstrated the value of radiometric methods in evaluating remediation, and the effect of other environmental processes. The value of spectrometric methods which directly measure radionuclide concentrations has also been shown, especially through the identification of the contribution of natural and anthropogenic activity to the measured dose rate. The experiment has shown that clearing trees and applying wood chips can reduce dose rates by 10-15% beyond that achieved by just clearing the forest litter and natural redistribution of radiocaesium.
| Item Type: | Articles |
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| Additional Information: | This research was financially supported by KAKENHI Grant Number 24110001 and 24110006, and part of the distributionmapping project, which was financed by the Ministry of Education, Culture, Sports, Science, and Technology, and the project on integrating distribution data and development of transfer model regarding radioactive substances derived from Fukushima Daiichi Nuclear Power Plant accident financed by the Nuclear Regulation Authority, Japan. Funding was also provided through the forest project of the Institute of Environmental Radioactivity, Fukushima University. |
| Keywords: | Radiocaesium, gamma dose rate; Fukushima nuclear accident. |
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Cresswell, Dr Alan |
| Authors: | Cresswell, A., Kato, H., Onda, Y., and Nanba, K. |
| Subjects: | Q Science > QC Physics |
| College/School: | College of Science and Engineering > Scottish Universities Environmental Research Centre |
| Journal Name: | Journal of Environmental Radioactivity |
| Publisher: | Elsevier |
| ISSN: | 0265-931X |
| Published Online: | 25 July 2016 |
| Copyright Holders: | Copyright © 2016 Elsevier Ltd. |
| First Published: | First published in Journal of Environmental Radioactivity 164: 133-144 |
| Publisher Policy: | Reproduced in accordance with the publisher copyright policy |
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