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Yamashita, Takuya; Sawada, Noriyoshi*
JAEA-Research 2019-010, 227 Pages, 2020/03
JAEA-Research-2019-010.pdf:21.44MBJAEA-Research-2019-010(errata).pdf:0.5MB
In order to support the decontamination activities proceeded by the national government and municipalities in terms of technology, we have developed a simulation system "RESET" which predicts the effect of decontamination. We also developed a "two-component model" for the purpose of predicting long-term changes in the air dose rate. We use these tools to perform decontamination simulation and predictive analysis of the air dose rate after decontamination, and provide information to the national government and municipalities aiming for reconstruction. In this report, the verification result of the prediction methods implemented using actual measurement data obtained in the "Decontamination model demonstration project in difficult-to-return zone" and "Survey result on transition of air dose rate after decontamination model demonstration project" conducted by Ministry of the Environment. In addition, the decontamination simulation conducted for the entire difficult-to-return area and the results of future prediction of the air dose rate after decontamination are shown.
Mikami, Satoshi; Matsuda, Norihiro; Ando, Masaki; Kinase, Sakae; Kitano, Mitsuaki; Kawase, Keiichi; Matsumoto, Shinichiro; Yamamoto, Hideaki; Saito, Kimiaki
Radioisotopes, 64(9), p.589 - 607, 2015/09
This article presents the features of regional distributions and temporal changes in air dose rate and radionuclide deposition densities in Fukushima on the basis of analyses on large-scale environmental monitoring results using diverse methods. The continuity of decontamination effects is discussed according to repeated monitoring data after the decontamination model project. Further, some examples are shown on the projection of air dose rates together with the ecological half lives for different land uses.
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Dekomisshoningu Giho, 0(15), p.24 - 34, 1996/12
no abstracts in English
Ikezawa, Yoshio
Saikin No Kenkyu Shisetsu, 0, p.304 - 311, 1995/00
no abstracts in English
Hoken Butsuri, 29, p.460 - 462, 1994/00
no abstracts in English
Ikezawa, Yoshio
Kurin Tekunoroji, 3(4), p.41 - 45, 1993/04
no abstracts in English
; ; ;
Proc. of Asia Congress on Radiation Protection, p.216 - 219, 1993/00
no abstracts in English
Sato, Nobuyuki; ; Kobayashi, Makoto; Nakazawa, Takashi; ; ; Ikezawa, Yoshio
Proc. of the Int. Conf. on Radiation Effects and Protection, p.440 - 445, 1992/00
no abstracts in English
; ; Onodera, Junichi; ; Ikezawa, Yoshio
Proc. of the Int. Conf. on Radiation Effects and Protection, p.434 - 439, 1992/00
no abstracts in English
Onodera, Junichi; ; ; ; ; Ikezawa, Yoshio
Proc. of the Int. Radiation Protection Association,Vol. 1, p.1412 - 1414, 1992/00
no abstracts in English
Ikezawa, Yoshio
Nihon Genshiryoku Gakkai-Shi, 33(5), p.439 - 440, 1991/05
no abstracts in English
Matsui, Hiroshi; Ikezawa, Yoshio
Firumu Bajji Nyusu, 0(161), p.7 - 10, 1990/05
no abstracts in English
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Dekomisshoningu Giho, (2), p.50 - 64, 1990/00
no abstracts in English
Kinouchi, Nobuyuki
Hoken Butsuri, 25, p.82 - 84, 1990/00
no abstracts in English
Ikezawa, Yoshio
Hoken Butsuri, 25(3), p.299 - 300, 1990/00
no abstracts in English
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Genshiryoku Kogyo, 32(9), p.70 - 74, 1986/09
no abstracts in English
Hoken Butsuri, 20, p.87 - 90, 1985/00
no abstracts in English
; ; ;
Hoken Butsuri, 19(1), p.321 - 327, 1984/00
no abstracts in English
; ; Yabe, Akira
Proc.of 5th Int.Radiation Protection Association Congress, p.217 - 220, 1980/00
no abstracts in English
-ray spectra obtained by airborne radiation monitoringOchi, Kotaro; Sasaki, Miyuki; Ishida, Mutsushi*; Sato, Tomohiko*; Hamamoto, Shoichiro*; Nishimura, Taku*; Sanada, Yukihisa
no journal, ,
A large amount of radiocesium (
Cs & 
Cs) were released into the atmosphere as a result of 2011 Fukushima Daiichi Nuclear Power Plant (FDNPP) accident. To estimate the impact of the accident to the environment, dose rate around FDNPP have been measured by MEXT. Dose rate nearby FDNPP, however, still stay high even though decontamination work was carried out, which means it is necessary to develop an effective decontamination method promptly. Information of depth profile of radiocesium in soil is required to realize it, though, most of measurement methods have trouble due to collection and measurement of soil samples. As we have developed the radiation measurement techniques using unmanned aerial vehicle to measure dose rate distribution over wide areas for years, we attempt to establish the estimation method of depth profile of radiocesium in soil based on characteristics of -ray spectra obtained by airborne radiation monitoring in this paper.
