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Dohi, Terumi; Muto, Kotomi; Yoshimura, Kazuya; Kanaizuka, Seiichi*; Iijima, Kazuki
KEK Proceedings 2019-2, p.14 - 19, 2019/11
In order to investigate the effect of topography, meteorological condition, etc., on the spatial distribution of air dose rate on the main plume path, we evaluated walking survey data of air dose rates on Mt. Koutaishi and Mt. Juman, directed in northwest of and approximately 33 km and 11 km from the FDNPP. Measurements were performed on two orbital routs with different constant altitudes and general mountain trails in each mountain. The measurement data were compared with airborne monitoring results to investigate the relation between the dose rate distribution and elevation and orientation. At Mt. Koutaishi, the air dose rate was particularly high on the east side of the mountain, and the significant dependence of direction on the dose rate distribution was observed. Furthermore, high dose rate near the mountain foot indicates possibility of large deposition of 
Cs due to the plume passage from the FDNPP. At Mt. Juman, uniformly distribution of air dose rate was observed, and effect of wet deposition was considered. These results suggest the possibility of different deposition mechanisms in mountain range unit.
Ando, Masaki
Hokeikyo Nyusu, (63), p.2 - 5, 2019/04
This is a commentary on the measurement of air dose rates by walk survey using KURAMA-II within 80 km range from the Fukushima Dai-ichi Nuclear Power Plant, which has been conducted as a commissioned research from the Nuclear Regulation Authority. The outline of KURAMA-II, the distribution map of air dose rates obtained by walk surveys, and the result of analysis concerning the decreasing trend of air dose rates are introduced based on the previous reports and thesis.
Sato, Tetsuro*; Ando, Masaki; Uno, Kiichiro; Nakano, Masakazu; Kanno, Takashi; Yamamoto, Hideaki; Matsumoto, Shinichiro; Saito, Kimiaki
no journal, ,
The distribution of radioactive cesium were examined by man borne survey method by using KURAMA-II monitoring system. The correlation between the air dose rate measured by man borne survey method and the air dose rate measured by survey meters at 1 m above ground were examined. The correlation between the air dose rate measured by man borne survey method and the air dose rate measured by car borne survey were examined.
Ando, Masaki; Sato, Tetsuro*; Matsuda, Norihiro; Yamamoto, Hideaki; Saito, Kimiaki
no journal, ,
Results of analysis for JAEA's car-borne surveys until December 2013 using KURAMA-II systems and comparisons with man-borne survey performed in 2013 are presented.
Yoshimura, Kazuya; Saito, Kimiaki; Fujiwara, Kenso; Nakama, Shigeo; Mikami, Satoshi
no journal, ,
no abstracts in English
Saito, Kimiaki; Mikami, Satoshi; Ando, Masaki; Matsuda, Norihiro; Tsuda, Shuichi; Yoshida, Tadayoshi; Yoshimura, Kazuya; Sato, Tetsuro*; Kanno, Takashi; Yamamoto, Hideaki
no journal, ,
no abstracts in English
