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Saegusa, Jun; Kurikami, Hiroshi; Yasuda, Ryo; Kurihara, Kazuo; Arai, Shigeki; Kuroki, Ryota; Matsuhashi, Shimpei; Ozawa, Takashi; Goto, Hiroaki; Takano, Takao; et al.
Health Physics, 104(3), p.243 - 250, 2013/03
Times Cited Count：3 Percentile：25.73(Environmental Sciences)After the Nuclear accident on March 2011, water discharge from many outdoor swimming pools in the Fukushima prefecture was suspended out of concern that radiocesium in the pool water would flow into farmlands. We have reviewed the existing flocculation method for decontaminating pool water and established a practical decontamination method by demonstrating the process at several pools in the Fukushima prefecture.
Ito, Hisayoshi; Seko, Noriaki; Kuroki, Ryota; Yaita, Tsuyoshi; Naganawa, Hirochika; Nakayama, Shinichi
Hoshasen Kagaku (Internet), (93), p.31 - 36, 2012/03
For removing radioactive contaminants from the environment due to the nuclear plant accident, we have synthesized highly efficient cesium absorbents by introducing molybdophosphoric acid groups into polyethylene matrix with radiation grafting. Cesium absorbents based on protein or crown ether materials have been newly developed. We have also established immobilization-collection technology of cesium-adsorbed surface soil by using a mixture of polyion and bentonitic clay material. The effectiveness of these materials has been demonstrated through the field examination in Fukushima.
Yoshimoto, Masahiro; Ueno, Tomoaki; Togashi, Tomohito; Takeda, Osamu; Kanazawa, Kenichiro; Watanabe, Masao; Yamazaki, Yoshio; Kamiya, Junichiro; Takayanagi, Tomohiro; Kuramochi, Masaya; et al.
IEEE Transactions on Applied Superconductivity, 18(2), p.297 - 300, 2008/06
Times Cited Count：4 Percentile：30.89(Engineering, Electrical & Electronic)Watanabe, Masao; Irie, Yoshiro; Kamiya, Junichiro; Shimada, Taihei; Takayanagi, Tomohiro; Fujimori, Hiroshi*; Igarashi, Susumu*; Kawakubo, Toshimichi*; Nakayama, Hisayoshi*
IEEE Transactions on Applied Superconductivity, 16(2), p.1350 - 1353, 2006/06
Times Cited Count：2 Percentile：18.89(Engineering, Electrical & Electronic)Thick septa are used in the injection and extraction section of the 3 GeV rapid cycling synchrotron of the J-PARC. We have been designing seven thick septum magnets, two for injection, two for beam dump and three for extraction, respectively. These septa require low-loss operations. For the mechanical stability they are operated by direct current. The yoke is made of the soft-iron block. We have been designing them by using the three-dimensional magnet static field calculation code, TOSCA. In this presentation, we discuss about magnetic field flatness in the gap and effects of the leakage fields in the synchrotron.
Nagano, Tetsushi; Mitamura, Hisayoshi; Nakayama, Shinichi; Nakashima, Satoru*
Clays and Clay Minerals, 47(6), p.748 - 754, 1999/00
Times Cited Count：16 Percentile：44.62(Chemistry, Physical)no abstracts in English
Ito, Hisayoshi; Seko, Noriaki; Kuroki, Ryota; Yaita, Tsuyoshi; Naganawa, Hirochika; Nakayama, Shinichi
no journal, ,
For removing radioactive elements scattered in environment due to nuclear plant accident, we have synthesized highly efficient cesium absorbents by introducing phosphomolybdic acid groups into polyethlene matrix with radiation grafting. Cesium absorbents based on protein or crown ether materials have been newly developed. We have also established immobilization and collection technology of cesium existed into the soil outer layer by using polyion and bentonite (clay). The effectiveness of these technologies has been demonstrated from the field examination in Fukushima.
Ito, Hisayoshi; Seko, Noriaki; Kuroki, Ryota; Yaita, Tsuyoshi; Nakayama, Shinichi
no journal, ,
For developing the removal technology of radioactive contaminants distributed in the environment due to the nuclear plant accident, we have succeeded in synthesizing highly efficient cesium absorbents by introducing molybdophosphoric acid groups into polyethylene matrix with radiation grafting. Cesium absorbents based on protein or crown ether materials have been newly developed by using molecular design and X-ray structure analysis. The effectiveness of these materials has been demonstrated through the field examination in Fukushima.
Seko, Noriaki; Kasai, Noboru; Ueki, Yuji; Saiki, Seiichi; Hoshina, Hiroyuki; Iwanade, Akio; Suzuki, Shinichi; Yaita, Tsuyoshi; Matsuhashi, Shimpei; Ito, Hisayoshi; et al.
no journal, ,
no abstracts in English
Suzuki, Shinichi; Yaita, Tsuyoshi; Okamoto, Yoshihiro; Shiwaku, Hideaki; Motokawa, Ryuhei; Kobayashi, Toru; Seko, Noriaki; Matsuhashi, Shimpei; Kawachi, Tetsuya; Ito, Hisayoshi; et al.
no journal, ,
no abstracts in English
Yaita, Tsuyoshi; Kobayashi, Toru; Motokawa, Ryuhei; Suzuki, Shinichi; Akutsu, Kazuhiro; Okamoto, Yoshihiro; Shiwaku, Hideaki; Seko, Noriaki; Ito, Hisayoshi; Kawachi, Tetsuya; et al.
no journal, ,
no abstracts in English
Nakayama, Shinichi; Ito, Hisayoshi; Matsuhashi, Shimpei; Kuroki, Ryota; Suzuki, Shinichi; Seko, Noriaki; Yaita, Tsuyoshi
no journal, ,
no abstracts in English
Ito, Hisayoshi; Seko, Noriaki; Kuroki, Ryota; Yaita, Tsuyoshi; Naganawa, Hirochika; Nakayama, Shinichi
no journal, ,
For developing the removal technology of radioactive contaminants from the environment, we have performed R&D of superior cesium adsorbents. As a result, we have synthesized highly efficient cesium adsorbents by introducing molybdophosphoric acid groups into polyethylene matrix with radiation grafting. We have designed and prepared several mutant proteins with high cesium affinity, which are appropriate for cesium adsorbents. Adsorbents based on dibenzo-20-crown 6-ether (DB20C6) with high cesium selectivity have been also developed. Furthermore, we have developed immobilization-collection technology of cesium-adsorbed surface soil by using synergetic functions of polyion and bentonitic clay. The effectiveness of the decontamination technology newly developed has been verified through the field tests in Iitate-mura, Fukushima.
