Radiocesium concentrations in shallow water sediments (Matsukawa-ura Lagoon, Fukushima, Japan) from a compact NaI(Tl) scintillation spectrometer. (September 2021)

• Record Type: Journal Article
• Authors: Higuchi, Ken; Arakawa, Hisayuki; Matsumoto, Akira; Narita, Kaoru; Morioka, Yoshiaki
• Is Part Of: Applied radiation and isotopes. Volume 175(2021)
• Publication Date: 2021-09
• Subjects: NaI(Tl) scintillation spectrometer -- Radiocesium -- Sediment -- Matsukawa-ura Lagoon -- Fukushima Dai-ichi nuclear power plant; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2021.109797
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: We collected continuous sedimentary 137 Cs concentration data from a shallow fishery ground (Matsukawa-ura Lagoon, Fukushima, Japan) in 2016 using a new compact underwater NaI(Tl) scintillation spectrometer and a quantitative technique. 137 Cs concentrations in sediments were low (approx. 40 Bq/kg DW) at the lagoon mouth and high (641.2 Bq/kg DW) at the head of the lagoon. Some areas of locally elevated 137 Cs concentrations (>500 Bq/kg DW) were also found. Highlights: A seabed radioactivity monitor (S-RAM) measured 137 Cs in shallow sea sediments. The S-RAM offers low count times (60 s) and rapid measurements. Concentrations of 137 Cs in Matsukawa-ura Lagoon were 40–641.2 Bq/kg DW. Isolated areas of high 137 Cs (>500 Bq/kg DW) were detected in the southern lagoon.