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Hemmi, Ko; Yamaguchi, Tetsuji; Takeda, Seiji; Kimura, Hideo
Genshiryoku Bakkuendo Kenkyu (CD-ROM), 24(1), p.3 - 14, 2017/06
Conditions of contaminated sources and ranges of forest decontamination that significantly reduce the air dose rate in residential areas were investigated by means of a sensitivity analysis related to the decontamination of the forest contaminated by radiocesium deriving from the accident at Fukushima Daiichi Nuclear Power Station. The contaminated sources including Cs and Cs were assumed to be a layer of sedimented organic matter (the A layer) and surface soils (the A layer). The air dose rates were calculated using the three-dimensional Monte Carlo transport code MCNP. A slope number of the forest, angles, state of contaminant distribution, radiocesium content in the forest soils, decontamination ranges, distance from the forest boundary to an evaluation point, and height at the evaluation point were adopted as the parameters. The decontamination of a litter (A) layer within the distance of 20 m from the forest boundary was revealed to be effective in reducing the air dose rate when the source distribution was homogeneous. The air dose rates were significantly reduced by the decontamination of the A layer within a distance of 40 m from the forest boundary on condition that the radiocesium content of the A layer was larger than that of the A layer and the source distribution was non-homogeneous, such as the forest areas beyond 20 m from the forest boundary, which were more heavily contaminated than those within 20 m.
Akino, Norio
Haiteku Shimpojium Yamaguchi 2001 Teiko Gensho Seigyo Shimpojium Rombunshu, p.37 - 43, 2001/11
no abstracts in English
Akino, Norio; Takase, Kazuyuki; Kubo, Shinji; Hino, Ryutaro
Dai-26-Kai Ranryu Shimpojiumu Koen Rombunshu 1994, 0, p.176 - 179, 1994/00
no abstracts in English
Hirouchi, Jun; Takahara, Shogo; Watanabe, Masatoshi; Munakata, Masahiro
no journal, ,
no abstracts in English
Watanabe, Masatoshi; Takahara, Shogo; Hirouchi, Jun; Munakata, Masahiro
no journal, ,
no abstracts in English
Hirouchi, Jun; Takahara, Shogo; Iijima, Masashi; Watanabe, Masatoshi; Munakata, Masahiro
no journal, ,
no abstracts in English
Uchita, Masato*; Miyagawa, Takayuki*; Murakami, Hisatomo*; Suzuno, Tetsuji*; Yamamoto, Tomohiko
no journal, ,
no abstracts in English
Hayashi, Naho; Nagakubo, Azusa; Takahara, Shogo
no journal, ,
no abstracts in English