Kinki University AERI conducted two studies on the radioactive contamination derived from the Fukushima Daiichi NPP in urban areas of Fukushima City since April 2011. One of these measurements was activities of surface soils and the other a survey of dose rate distributions. The results presented herein demonstrate that the dose rate distribution changed with time and that the dose rate distributions in paved areas have different characteristics for different paving materials.
This phenomenon is estimated to occur by capture activity differences of the paving materials for radioactive materials. More detailed studies are needed to acquire evidence of the mechanisms of the phenomenon.
Open Access This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.
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