Regional long-term model of radioactivity dispersion and fate in the Northwestern Pacific and adjacent seas: application to the Fukushima Dai-ichi accident SCIE SCOPUS

Cited 28 time in WEB OF SCIENCE Cited 29 time in Scopus
Title
Regional long-term model of radioactivity dispersion and fate in the Northwestern Pacific and adjacent seas: application to the Fukushima Dai-ichi accident
Author(s)
Maderich, V.; Bezhenar, R.; Heling, R.; de With, G.; Jung, K. T.; Myoung, J. G.; Cho, Y-K; Qiao, F.; Robertson, L.
KIOST Author(s)
Myoung, Jung Goo(명정구)
Publication Year
2014-05
Abstract
The compartment model POSEIDON-R was modified and applied to the Northwestern Pacific and adjacent seas to simulate the transport and fate of radioactivity in the period 1945-2010, and to perform a radiological assessment on the releases of radioactivity due to the Fukushima Dai-ichi accident for the period 2011-2040. The model predicts the dispersion of radioactivity in the water column and in sediments, the transfer of radionuclides throughout the marine food web, and subsequent doses to humans due to the consumption of marine products. A generic predictive dynamic food-chain model is used instead of the biological concentration factor (BCF) approach. The radionuclide uptake model for fish has as a central feature the accumulation of radionuclides in the target tissue. The three layer structure of the water column makes it possible to describe the vertical structure of radioactivity in deep waters. In total 175 compartments cover the Northwestern Pacific, the East China and Yellow Seas and the East/Japan Sea. The model was validated from Cs-137 data for the period 1945-2010. Calculated concentrations of Cs-137 in water, bottom sediments and marine organisms in the coastal compartment, before and after the accident, are in close agreement with measurements from the Japanese agencies. The agreement for water is achieved when an additional continuous flux of 3.6 TBq y(-1) is used for underground leakage of contaminated water from the Fukushima Dai-ichi NPP, during the three years following the accident. The dynamic food web model predicts that due to the delay of the transfer throughout the food web, the concentration of Cs-137 for piscivorous fishes returns to background level only in 2016. For the year 2011, the calculated individual dose rate for Fukushima Prefecture due to consumption of fishery products is 3.6 mu Sv y(-1). Following the Fukushima Dai-ichi accident the collective dose due to ingestion of marine products for Japan increased in 2011 by a factor of 6 in comparison with 2010. (C) 2013 Elsevier Ltd. All rights reserved.
ISSN
0265-931X
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2823
DOI
10.1016/j.jenvrad.2013.09.009
Bibliographic Citation
JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, v.131, pp.4 - 18, 2014
Publisher
ELSEVIER SCI LTD
Subject
OCEANIC DISPERSION; COMPUTER CODE; CS-137; RADIONUCLIDES; PU-239,PU-240; TRANSPORT; BIOTA; SIMULATIONS; ASSESSMENTS; SEDIMENT
Keywords
Compartment modelling; Radionuclide transfer in marine biota; Human ingestion doses; Fukushima Dai-ichi accident
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER SCI LTD
Related Researcher
Research Interests

Fish ecology,Fish taxonomy,Fish stock enhancement,어류생태,어류분류,어류자원증식

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