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Kim, M.; Malins, A.*; Machida, Masahiko; Yoshimura, Kazuya; Saito, Kimiaki; Yoshida, Hiroko*
Nihon Genshiryoku Gakkai Wabun Rombunshi (Internet), 22(4), p.156 - 169, 2023/11
Dose reduction factor of a Japanese house is important information in the external exposure estimation of returning residents. In 2019, a total of 19 wooden houses were surveyed in Iitate Village and Namie Town using a gamma plotter that can continuously measure the air dose rate. In addition, the characteristics of the reduction factor were investigated from the measured air dose rate. In the vicinity of houses, uncontaminated areas exist underneath houses and, the ratio of paved surfaces such as asphalt roads is relatively high; furthermore, the pavement has a tendency for the radiation source to decay quickly. Therefore, the air dose rate near the house showed a relatively low value in common at all sites. Air dose rates above unpaved surfaces showed higher values and larger variations than those above paved surfaces within a radius of 50 m form the center of a house. The reduction factor was widely distributed even for one house, if the ratio of every air dose rate observed inside and outside the house is considered. It is suggested that a realistic reduction factor may not be obtained when the reduction factor is obtained based on the measured values at a small number of points that do not have the representativeness of the radiation field to be measured.
Saito, Kimiaki; Takahara, Shogo; Uezu, Yasuhiro
Nihon Genshiryoku Gakkai-Shi ATOMO
, 60(2), p.111 - 115, 2018/02
no abstracts in English
Saito, Kimiaki; Kurihara, Osamu*; Matsuda, Norihiro; Takahara, Shogo; Sato, Tetsuro*
Radioisotopes, 65(2), p.93 - 112, 2016/02
Late information is introduced on dose evaluation due to external exposures which employ an important role in the exposures due to the Fukushima accident. First, merits and demerits of the currently used two methods, that is the estimation based air dose rates and the measurements using personal dosimeters, are discussed indicating some basic data after a fundamental concept of external dose evaluation is provided. Next, main activities are summarized on external dose measurements and evaluations after the accident. Finally, a new trial on dose evaluation in introduced.
rays and the exposure dosesSaito, Kimiaki; Endo, Akira
Radioisotopes, 63(12), p.585 - 602, 2014/12
The article provides the fundamental information necessary for the appropriate evaluation of exposure doses in the environment. The basic characteristics of environmental rays from typical environmental sources are introduced; then, the dose conversion coeffcients for the public at different ages are summarized which were obtained from the simulation considering the basic characteristics of environmental rays. Further, the variations of environmental exposure doses due to a variety of factors, and the relation of exposure doses to measured air dose rates are discussed.
Saito, Kimiaki
Radioisotopes, 63(11), p.515 - 517, 2014/11
no abstracts in English
Endo, Akira; Sato, Kaoru; Noguchi, Hiroshi; Tanaka, Susumu; Iida, Takao*; Furuichi, Shinya*; Kanda, Yukio*; Oki, Yuichi*
Journal of Radioanalytical and Nuclear Chemistry, 256(2), p.231 - 237, 2003/05
Times Cited Count：7 Percentile：45.73(Chemistry, Analytical)Size distributions of 
Cl, 
Cl, 
Br and 
Br aerosols generated by irradiations of argon and krypton gases containing di-octyl phthalate (DOP) aerosols with 45MeV and 65MeV quasi-monoenergetic neutrons were measured to study the formation mechanism of radioactive particles in high energy radiation fields. Effects of the size distribution of the radioactive aerosols on the size of added DOP aerosols, the energy of irradiation neutrons and the kinds of nuclides were studied. The observed size distributions of the radioactive particles were explained by attachment of the radioactive atoms generated by the neutron-induced reactions to the DOP aerosols.
Morita, Kenji*; Suzuki, Hironori*; Soda, Kazuo*; Iwahara, Hiroiku*; Nakamura, Hirofumi; Hayashi, Takumi; Nishi, Masataka
Journal of Nuclear Materials, 307-311(2), p.1461 - 1465, 2002/12
Times Cited Count：2 Percentile：16.76(Materials Science, Multidisciplinary)no abstracts in English
Hoken Butsuri, 29, p.460 - 462, 1994/00
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
Ikezawa, Yoshio
Nihon Genshiryoku Gakkai-Shi, 33(5), p.439 - 440, 1991/05
no abstracts in English
;
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
Co -ray transport through air by discrete-ordinates transport codes; *
Nuclear Technology, 47(1), p.189 - 199, 1980/00
Times Cited Count：4 Percentile：48.92(Nuclear Science & Technology)no abstracts in English
LiF and 
LiF thermoluminescence dosimeters in pair use;
Nuclear Instruments and Methods, 117(1), p.93 - 97, 1974/01
no abstracts in English
Saito, Kimiaki
no journal, ,
Tschiersch, J.*; Yoshimura, Kazuya; Spielmann, V.*; Iijima, Kazuki; Shinonaga, Taeko*; Miyahara, Kaname
no journal, ,
Sato, Rina; Yoshimura, Kazuya; Sanada, Yukihisa; Sato, Tetsuro*
no journal, ,
no abstracts in English
Sato, Rina; Yoshimura, Kazuya; Abe, Tomohisa; Funaki, Hironori; Mori, Airi; Sanada, Yukihisa; Mori, Tsubasa*; Sato, Tetsuro*
no journal, ,
Abe, Tomohisa; Funaki, Hironori; Yoshimura, Kazuya; Sato, Rina; Sasaki, Miyuki
no journal, ,
Sato, Rina; Yoshimura, Kazuya; Sanada, Yukihisa; Yajima, Kazuaki*; Aono, Tatsuo*
no journal, ,
no abstracts in English
