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Tamakuma, Yuki*; Yamada, Ryohei; Iwaoka, Kazuki*; Hosoda, Masahiro*; Kuroki, Tomohiro*; Mizuno, Hiroyuki*; Yamada, Koji*; Furukawa, Masahide*; Tokonami, Shinji*
Perspectives in Science (Internet), 12, p.100414_1 - 100414_4, 2019/09
In this study, a portable radioactive plume monitor using a silicon photodiode was developed for the detection of a radioactive plume (e.g. 
I, 
Cs and 
Cs) in an emergency situation. It was found that the background count rate was proportional to ambient dose equivalent rate and the detection limit for the monitor at 20 
Sv h
as an ambient dose equivalent rate was evaluated to be 187 Bq m
using the ISO11929 method. These results suggest that the detection limit for the system can be decreased effectively by lead shielding with optimized thickness.
Takeuchi, Tomoaki; Shibata, Hiroshi; Hanakawa, Hiroki; Uehara, Toshiaki*; Ueno, Shunji*; Tsuchiya, Kunihiko; Kumahara, Hajime*; Shibagaki, Taro*; Komanome, Hirohisa*
JAEA-Technology 2017-026, 26 Pages, 2018/02
JAEA-Technology-2017-026.pdf:4.0MB
Under severe accidents, high-integrity transmission techniques are necessary so as to monitor the situation of the nuclear power plant. In this study, effects of gamma irradiation up to 10
Gy on properties of optical devices were evaluated toward the development of a radiation-resistant in-water wireless transmission system using visible light. After the irradiation, for the LEDs, the total luminous flux decreased and the browning of resin lenses occurred. Meanwhile, the current-voltage characteristics hardly changed. For the PDs, the light sensitivity decreased and the browning of resin window occurred. The dark currents of PDs did not become large enough to adversely affect transmission. These results indicated that both the decreases of the total luminous flux of the LEDs and the light sensitivity of the PDs were mainly caused by not the degradation of the semiconductor parts but the browning of the resin parts by the irradiation. In addition, basic decrease behaviors of light transmission of several different types of glasses by gamma irradiation were also obtained so as to select the suitable optical windows and filters for the developing radiation-resistant in-water wireless transmission system.
Onoda, Shinobu; Hirao, Toshio; Laird, J. S.; Okamoto, Tsuyoshi*; Koizumi, Yoshiharu*; Kamiya, Tomihiro
Nuclear Instruments and Methods in Physics Research B, 231(1-4), p.497 - 501, 2005/04
Times Cited Count：3 Percentile：30.27(Instruments & Instrumentation)no abstracts in English
Laird, J. S.; Hirao, Toshio; Onoda, Shinobu; Wakasa, Takeshi; Yamakawa, Takeshi; Abe, Hiroshi; Kamiya, Tomihiro; Ito, Hisayoshi
Proceedings of the 6th International Workshop on Radiation Effects on Semiconductor Devices for Space Application (RASEDA-6), p.125 - 129, 2004/10
no abstracts in English
Onoda, Shinobu; Hirao, Toshio; Laird, J. S.; Wakasa, Takeshi; Yamakawa, Takeshi; Okamoto, Tsuyoshi*; Koizumi, Yoshiharu*; Kamiya, Tomihiro; Ito, Hisayoshi
Proceedings of the 6th International Workshop on Radiation Effects on Semiconductor Devices for Space Application (RASEDA-6), p.173 - 176, 2004/10
no abstracts in English
Wakasa, Takeshi; Hirao, Toshio; Sanami, Toshiya*; Onoda, Shinobu; Abe, Hiroshi; Tanaka, Susumu; Kamiya, Tomihiro; Okamoto, Tsuyoshi*; Ito, Hisayoshi
Proceedings of the 6th International Workshop on Radiation Effects on Semiconductor Devices for Space Application (RASEDA-6), p.213 - 216, 2004/10
no abstracts in English
and electron irradiation pin photodiodeOnoda, Shinobu; Hirao, Toshio; Laird, J. S.; Mori, Hidenobu; Okamoto, Tsuyoshi*; Koizumi, Yoshiharu*; Ito, Hisayoshi
Proceedings of 6th European Conference on Radiation and its Effects on Components and System (RADECS 2001) (CD-ROM), 5 Pages, 2002/00
no abstracts in English
Sano, Mutsumi*; Yoshigoe, Akitaka; Teraoka, Yuden; Saito, Norio*; Suzuki, Isao*
JAERI-Tech 2000-081, 21 Pages, 2001/02
JAERI-Tech-2000-081.pdf:0.79MB
no abstracts in English
Kamiya, Tomihiro; Sakai, Takuro; *; *; Hirao, Toshio
Nuclear Instruments and Methods in Physics Research B, 158(1-4), p.255 - 259, 1999/00
Times Cited Count：6 Percentile：46.78(Instruments & Instrumentation)no abstracts in English
Nishimori, Nobuyuki; Minehara, Eisuke; Sugimoto, Masayoshi; Sawamura, Masaru; Nagai, Ryoji; Kikuzawa, Nobuhiro
Review of Scientific Instruments, 69(1), p.327 - 328, 1998/01
Times Cited Count：6 Percentile：49.2(Instruments & Instrumentation)no abstracts in English
*; Akino, Norio; *
Nihon Kikai Gakkai Rombunshu, B, 63(611), p.220 - 223, 1997/07
no abstracts in English
Akino, Norio; *; *; Kubo, Shinji; *; *
Dai-32-Kai Nihon Dennetsu Shimpojiumu Koen Rombunshu, 0, p.307 - 308, 1995/05
no abstracts in English
Nagashima, Keisuke; Nishitani, Takeo; Takeuchi, Hiroshi
JAERI-M 89-226, 23 Pages, 1990/01
no abstracts in English
Hoshasen, 12(3), p.22 - 31, 1986/00
no abstracts in English
-Line Emission by Photodiode and Its Calibration; ; ;
JAERI-M 85-192, 21 Pages, 1985/11
no abstracts in English
