In situ measurement of [sup.134]Cs and [sup.137]Cs in seabed using underwater γ-spectrometry systems: application in surveys following the Fukushima Dai-ichi nuclear power plant accident

Two underwater γ-spectrometric systems incorporating NaI(Tl) detectors (the seabed mooring system and the towing system) were used to measure radiocesium in seabed that was released due to the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident and assess the accuracy of in situ measurements on...

Full description

Saved in:
Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2015-02, p.1575
Main Author: Kofuji, Hisaki
Format: Article
Language:English
Subjects:
Accidents
Detectors
Hostages
Measurement
Nuclear accidents
Nuclear energy
Nuclear power plants
Ocean bottom
Spectrum analysis
Surveys
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Two underwater γ-spectrometric systems incorporating NaI(Tl) detectors (the seabed mooring system and the towing system) were used to measure radiocesium in seabed that was released due to the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident and assess the accuracy of in situ measurements on seabed. We also applied a simple calculating method for seabed radiocesium by separating the γ-spectra based on four contributions ([sup.134]Cs + [sup.137]Cs, [sup.40]K, U-series, and Th-series radionuclides). The concentration of [sup.134]Cs + [sup.137]Cs in sediments at two sites in Sendai Bay were calculated to be between 10-250 Bq/kg-dry through our method with a short integration time (1-5 min). Keywords In situ γ-spectrometry * Radiocesium * Marine sediment * Fukushima Dai-ichi Nuclear Power Plant accident
ISSN:0236-5731
DOI:10.1007/s10967-014-3702-0