Abstract
Lateral and temporal profiles for concentrations of 134Cs and 137Cs were examined in marine sediments obtained from coastal and offshore areas on the Sea of Japan-side of central Honshu. In 2013, concentrations declined sharply from an estuarine (30 Bq/kg-dry for 134Cs) to offshore areas. In the offshore Sado Basin, the concentration of short-lived 134Cs, which was not detected (<0.3 Bq/kg-dry) in 2010, was 1–15 Bq/kg-dry in 2011–2013. Discharged riverine materials affected by radiocesium derived from the Fukushima Dai-ichi Nuclear Power Plant have been delivered to this offshore basin.
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Acknowledgments
We thank the researchers, captain, and crew of all the R/Vs used in this study for their assistance during sampling. This study was partly supported by a Grant-in-Aid to M. Inoue (Scientific Research No. 24510011) from the Ministry of Education, Culture, Sports, Science, and Technology, Japan.
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Inoue, M., Yoneoka, S., Ochiai, S. et al. Lateral and temporal variations in Fukushima Dai-ichi NPP-derived 134Cs and 137Cs in marine sediments in/around the Sado Basin, Sea of Japan. J Radioanal Nucl Chem 303, 1313–1316 (2015). https://doi.org/10.1007/s10967-014-3518-y
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DOI: https://doi.org/10.1007/s10967-014-3518-y