CESIUM-RICH MICROPARTICLES RUNOFF DURING RAINFALL: A CASE STUDY IN THE TAKASE RIVER. Issue 13 (9th September 2022)

• Record Type: Journal Article
• Authors: Tatsuno, Takahiro; Waki, Hiromichi; Kakuma, Minato; Nihei, Naoto; Wada, Toshihiro; Yoshimura, Kazuya; Nakanishi, Takahiro; Ohte, Nobuhito
• Is Part Of: Radiation protection dosimetry. Volume 198:Issue 13/15(2022)
• Page Start: 1052
• Page End: 1057
• Publication Date: 2022-09-09
• Subjects: Radiation dosimetry -- Periodicals; Radiation -- Safety measures -- Periodicals; 363.1799
• DOI: 10.1093/rpd/ncac052
• Languages: English
• ISSNs: 0144-8420

Abstract

Abstract: Cesium-rich microparticles (CsMPs) with high cesium-137 ( 137 Cs) concentrations were released and deposited in surface soil after the Fukushima Daiichi Nuclear Power Plant accident. Radioactive materials on the soil surface layer enter rivers owing to soil erosion during rainfall. In this study, we investigated CsMPs runoff through the river via soil erosion during rainfall in the Takase River watershed in Namie Town, Fukushima Prefecture, Japan. CsMPs were rarely detected in suspended solids (SS) in water samples collected during four rainfalls between February and July 2021. Furthermore, the proportion of 137 Cs concentration derived from CsMPs to 137 Cs concentration in the form of SS (particulate 137 Cs) in the water was ~6% on average, which suggests that 137 Cs runoff in the form of CsMPs from the forest to the Takase River was not large.