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Nagai, Haruyasu; Terada, Hiroaki; Chino, Masamichi
Tenki, 48(4), p.11 - 14, 2001/04
no abstracts in English
Nagai, Haruyasu; Katata, Genki; Terada, Hiroaki; Chino, Masamichi
no journal, ,
JAEA has been developing simulation system to predict the environmental transport of radionuclide. SPEEDI was developed and it is currently operational as a emergency response system of Japan. By expanding SPEEDI, WSPEEDI was constructed with a combination of atmospheric model MM5 and particle dispersion model GEARN. WSPEEDI has been applied for analysis on the environmental impact by the Fukushima Daiichi NPP accident. At first, the source term of radionuclide discharged into the atmosphere was estimated by coupling monitoring data with atmospheric dispersion simulations. By using this source term, detailed analysis on the local and regional atmospheric dispersion has been carried out. The source term was also used by the UNSCEAR for the atmospheric dispersion analysis and dose estimation. Recently, we re-estimated source term by using newly released data and modified WSPEEDI. The simulation well reproduced the local and regional deposition pattern of 
I and 
Cs.
Nagai, Haruyasu
no journal, ,
no abstracts in English
Terada, Hiroaki; Nagai, Haruyasu
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no abstracts in English
Nagai, Haruyasu; Terada, Hiroaki
no journal, ,
no abstracts in English
Terada, Hiroaki
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no abstracts in English
Nagai, Haruyasu; Tanimori, Toru*; Nakayama, Hiromasa; Satoh, Daiki; Furuta, Yoshihiro
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no abstracts in English
Terada, Hiroaki
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no abstracts in English
Nagai, Haruyasu; Furuta, Yoshihiro*; Satoh, Daiki; Nakayama, Hiromasa
no journal, ,
no abstracts in English
Nagai, Haruyasu
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no abstracts in English
Nagai, Haruyasu
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no abstracts in English
