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Ando, Masaki; Matsuda, Norihiro; Saito, Kimiaki
Nippon Genshiryoku Gakkai Wabun Rombunshi, 16(2), p.63 - 80, 2017/05
In order to discriminate the contribution of radioactive cesium due to the Fukushima Dai-ichi Nuclear Power Plant accident to the air dose rates measured by the car-borne surveys, natural background radiation was evaluated for eastern Japan area as the municipality averaged values. The window count method for distinction between natural and artificial radioactive nuclides was applied to the car-borne surveys using the KURAMA-II. Distribution of the evaluated natural background radiation showed geological feature, and it was found that the radiations measured along paved roads were reflecting the distribution of terrestrial 
-rays. The effect of the radioactive cesium as of 2014 for the municipalities designated as the Intensive Contamination Survey Area was beyond the uncertainty of the natural background radiation. That for the other municipalities, however, was found to be almost negligible.
Hanzawa, Yukiko; Magara, Masaaki; Watanabe, Kazuo; Esaka, Fumitaka; Miyamoto, Yutaka; Yasuda, Kenichiro; Gunji, Katsubumi*; Sakurai, Satoshi; Takano, Seinojo*; Usuda, Shigekazu; et al.
Journal of Nuclear Science and Technology, 40(1), p.49 - 56, 2003/01
Times Cited Count：3 Percentile：72.62(Nuclear Science & Technology)The JAERI has established a cleanroom facility with cleanliness of ISO Class 5: the Clean Laboratory for Environmental Analysis and Research (CLEAR). It was designed to be used for the analysis of nuclear materials in environmental samples for the safeguards, the Comprehensive Nuclear-Test-Ban Treaty verification and research on environmental sciences. The CLEAR facility was designed to meet double conflicting requirements of a cleanroom and for handling of nuclear materials according to Japanese regulations, i.e., to avoid contamination from outside and to contain nuclear materials inside the facility. This facility has been intended to be used for wet chemical treatment, instrumental analysis and particle handling. A fume-hood to provide a clean work surface for handling of nuclear materials was specially designed. The performance of the cleanroom and analytical background in the laboratory are discussed. It can be concluded that the CLEAR facility enables analysis of ultra trace amounts of nuclear materials at the sub-picogram level in environmental samples.
Miyamoto, Yutaka; Oda, Tetsuzo; Adachi, Takeo; Noguchi, Hiroshi; Nishimura, Hideo; Usuda, Shigekazu
Nukleonika, 46(4), p.123 - 126, 2001/12
no abstracts in English
Ueno, Takashi; Amano, Hikaru
Proc. of Int. Workshop on Health and Environmental Effects of Mercury due to Mining Operations, p.178 - 189, 1997/00
no abstracts in English
Nagaoka, Toshi; Sakamoto, Ryuichi; Saito, Kimiaki; Tsutsumi, Masahiro; Moriuchi, Shigeru
JAERI-M 93-125, 41 Pages, 1993/06
no abstracts in English
Kimura, Takaumi
Journal of Nuclear Science and Technology, 27(12), p.1147 - 1150, 1990/12
no abstracts in English
Nagaoka, Toshi; Sakamoto, Ryuichi; Saito, Kimiaki; Tsutsumi, Masahiro; Moriuchi, Shigeru
JAERI-M 89-155, 32 Pages, 1989/10
no abstracts in English
*; ; *
JAERI-M 9614, 31 Pages, 1981/08
no abstracts in English
Rn in air using liquid scintillation techniques;
Radioisotopes, 30(12), p.649 - 654, 1981/00
no abstracts in English
;
JAERI-M 8578, 47 Pages, 1979/12
no abstracts in English
*; *; *; Kitahara, Yoshihisa*; ; *; ; *
PNC-TN841 78-69VOL1, 127 Pages, 1978/12
PNC-TN841-78-69VOL1.pdf:4.48MB
no abstracts in English
