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Tsubono, T. ., Central Research Institute of Electric Power industry, Abiko, Japan, tsubono@criepi.denken.or.jp
Tsumune, D. ., Research Institute of Electric Power industry, Abiko, Japan, tsumune@criepi.denken.or.jp
Aoyama, M. ., Meteorological Research Institute, Tsukuba, Japan, maoyama@mri-jma.go.jp
Hirose, K. ., Sophia University, Tokyo, Japan, hirose45037@mail2.accsnet.ne.jp

ESTIMATION OF THE AMOUNT OF CAESIUM-137 DIRECTLY RELEASED FROM THE FUKUSHIMA DAIICHI NUCLEAR POWER PLANT BY SENSITIBITY ANALYSYS

We estimated maximum release rate and whole amount of 137Cs directly released from the FUKUSHIMA DAIICHI Nuclear Power Plant (1F NPP) after the nuclear accident. We employed three boundaries and restored conditions for the simulation of 137Cs concentrations off Fukushima coast by the Regional Ocean Models (ROMS). These conditions are only boundaries used and these plus sponge layer and full domain restored with temperature and salinity interpolated from the HYCOM assimilation data. The maximum release rate and whole amounts of 137Cs released were estimated to be about 250 MBq/s and about 3.5 PBq to minimize the cost function between simulated 137Cs concentration and observed one near Fukushima Daini Nuclear Power Plant (10km south from 1F NPP) and Iwasawa coast (16km south from 1F NPP). In addition, we also employed the JCOPE2 assimilation data as boundaries and full domain restored data to compare with the results by the HYCOM.

Poster presentation

Session #:088
Date: 2/21/2012
Time: 17:00 - 18:00
Location: Poster/Exhibit Hall

Presentation is given by student: No

PosterID: B1013