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Terasaka, Yuta; Sato, Yuki; Uritani, Akira*
Nuclear Instruments and Methods in Physics Research A, 1062, p.169227_1 - 169227_6, 2024/05
Morishita, Yuki; Miyamura, Hiroko; Sato, Yuki; Oura, Masatoshi*
Radiation Measurements, 171, p.107064_1 - 107064_7, 2024/02
Times Cited Count：0The detection of alpha and beta contamination locations is important for decontaminating nuclear facilities. In the high radiation dose rate environment at the decommissioning sites, the contamination measurement by the workers is not effective. Thus, we developed a remote automatic contamination measurement system using a new scintillator-based detector. A 50 mm
100-
m-thick YAlO
(Ce)(YAP:Ce) scintillator was coupled with a flat panel-type multianode photomultiplier tube. The detector was installed downwards at the bottom of a robot. It has an energy measurement capability, and the energy measurement could discriminate the alpha particles from the beta and 
Rn alpha particles. With the energy information, alpha and beta particles could be identified and mapped simultaneously. In addition, a slow-moving robot could be used to obtain statistically sufficient counts in a single run measurement, allowing the evaluation of surface contamination density using only alpha particles. The remote automatic contamination measurement system will be useful in visualizing the contamination distribution in environments that are inaccessible to workers.
Sato, Yuki; Terasaka, Yuta
Journal of Nuclear Science and Technology, 60(8), p.1013 - 1026, 2023/08
Times Cited Count：5 Percentile：98.92(Nuclear Science & Technology)Sato, Yuki
Isotope News, (781), p.19 - 23, 2022/06
no abstracts in English
Sato, Yuki; Terasaka, Yuta
Journal of Nuclear Science and Technology, 59(6), p.677 - 687, 2022/06
Times Cited Count：17 Percentile：95.64(Nuclear Science & Technology)Sato, Yuki
Kensa Gijutsu, 27(5), p.9 - 15, 2022/05
no abstracts in English
Torii, Tatsuo*; Sanada, Yukihisa; Sato, Yuki
Nihon Genshiryoku Gakkai-Shi ATOMO
, 64(1), p.17 - 22, 2022/01
Ten years have passed since the accident at the Fukushima Daiichi Nuclear Power Station. Due to the accident, radioactive materials were widely diffused and deposited not only in the building and site of the Fukushima Daiichi Nuclear Power Station but also in the environment. Demand has increased, and the introduction and development of radiation imaging equipment called gamma cameras and mapping of radiation distribution in the environment have been promoted. Here, we will introduce the radiation distribution measurement technology that has been developed and operated after the accident, and describe the future prospects.
Mochimaru, Takanori*; Koizumi, Mitsuo; Takahashi, Tone; Hironaka, Kota; Kimura, Yoshiki; Sato, Yuki; Terasaka, Yuta; Yamanishi, Hirokuni*; Wakabayashi, Genichiro*
Dai-42-Kai Nihon Kaku Busshitsu Kanri Gakkai Nenji Taikai Kaigi Rombunshu (Internet), 4 Pages, 2021/11
no abstracts in English
Sato, Yuki; Minemoto, Kojiro*; Nemoto, Makoto*; Torii, Tatsuo
Journal of Nuclear Engineering and Radiation Science, 7(4), p.042003_1 - 042003_12, 2021/10
Kitayama, Yoshiharu; Terasaka, Yuta; Sato, Yuki; Torii, Tatsuo
Journal of Nuclear Engineering and Radiation Science, 7(4), p.042006_1 - 042006_7, 2021/10
Terasaka, Yuta; Watanabe, Kenichi*; Uritani, Akira*; Yamazaki, Atsushi*; Sato, Yuki; Torii, Tatsuo; Wakaida, Ikuo
Journal of Nuclear Engineering and Radiation Science, 7(4), p.042002_1 - 042002_7, 2021/10
For the application in the measurement of the high dose rate hot spots inside the Fukushima Daiichi Nuclear Power Station (FDNPS) buildings, we propose a novel one-dimensional radiation distribution sensing method using an optical fiber sensor based on wavelength spectrum unfolding. The proposed method estimates the incident position of radiation to the fiber by the unfolding of the wavelength spectrum output from the fiber edge using the fact that the attenuation length of light along the fiber depends on the wavelength. Because this method measures the integrated light intensity, this method can avoid the problem of counting loss and signal pile-up, which occurs in the radiation detector with pulse counting mode under high dose rate field. Through basic experiments using the ultraviolet light source and 
Sr/Y radioactive point source, basic properties of source position detection were confirmed.
Sato, Yuki; Minemoto, Kojiro*; Nemoto, Makoto*
Radiation Measurements, 142, p.106557_1 - 106557_6, 2021/03
Times Cited Count：2 Percentile：31.78(Nuclear Science & Technology)Sato, Yuki; Minemoto, Kojiro*; Nemoto, Makoto*; Torii, Tatsuo
Journal of Instrumentation (Internet), 16(1), p.P01020_1 - P01020_18, 2021/01
Times Cited Count：1 Percentile：9.32(Instruments & Instrumentation)Sato, Yuki; Terasaka, Yuta; Torii, Tatsuo
Nihon Genshiryoku Gakkai-Shi ATOMO, 62(11), p.645 - 649, 2020/11
no abstracts in English
Sato, Yuki; Minemoto, Kojiro*; Nemoto, Makoto*; Torii, Tatsuo
Nuclear Instruments and Methods in Physics Research A, 976, p.164286_1 - 164286_6, 2020/10
Times Cited Count：14 Percentile：87.95(Instruments & Instrumentation)Sato, Yuki; Torii, Tatsuo
Nuclear Technology, 206(7), p.v - xvi, 2020/07
Times Cited Count：2 Percentile：24.28(Nuclear Science & Technology)Sato, Yuki; Torii, Tatsuo
Nuclear Technology, 206(7), P. 1095, 2020/07
Times Cited Count：0 Percentile：20(Nuclear Science & Technology)Sato, Yuki; Ozawa, Shingo*; Terasaka, Yuta; Minemoto, Kojiro*; Tamura, Satoshi*; Shingu, Kazutoshi*; Nemoto, Makoto*; Torii, Tatsuo
Journal of Nuclear Science and Technology, 57(6), p.734 - 744, 2020/06
Times Cited Count：20 Percentile：93.76(Nuclear Science & Technology)Terasaka, Yuta; Watanabe, Kenichi*; Uritani, Akira*; Yamazaki, Atsushi*; Sato, Yuki; Torii, Tatsuo; Wakaida, Ikuo
Proceedings of International Youth Nuclear Congress 2020 (IYNC 2020) (Internet), 4 Pages, 2020/05
Kitayama, Yoshiharu; Terasaka, Yuta; Sato, Yuki; Torii, Tatsuo
Proceedings of International Youth Nuclear Congress 2020 (IYNC 2020) (Internet), 4 Pages, 2020/05
