[2B05-09] Environmental Radiation in Fukushima River

[2B07] A study of sampling methods to evaluate Cs-137 suspended particles in a river

*Koki Nasu¹, Yukio Takeuchi¹, Ayumi Irisawa¹, Shaoyan Fan¹, Keisuke Taniguchi², Yuichi Onda³ (1. Fukushima Prefectural , 2. NIT Tsuyama College, 3. Univ. of Tsukuba)

Keywords:TEPCO fukushima daiichi nuclear disaster, Radioactive cesium, River, Suspended particle

As a method to observe Cs-137 in a suspended particle flowing down a river, a method exists to install a suspended sediment sampler in a river and to analyze a suspended particle sampled inside the sampler. It is thought that a suspended sediment sampler can gather an average suspended particle sample of the river water, but there are few examples which confirmed whether a gathered sample is actually an average thing. In this study, we sampled a suspended particle by a suspended sediment sampler in Abukuma River, and collected river water during the setting period of the sampler. We considered from comparison of the Cs-137 concentration of suspended particle, from the suspended sediment sampler and from water samples.