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Takada, Chie; Kurihara, Osamu*; Kanai, Katsuta; Nakagawa, Takahiro; Tsujimura, Norio; Momose, Takumaro
NIRS-M-252, p.3 - 11, 2013/03
A massive earthquake and tsunami on March 11, 2011 resulted in an enormous amount of release of radioactivity to the environment. On the day after the earthquake occurrence, Japan Atomic Energy Agency (JAEA) started emergency radiological monitoring. The measurements with whole body counter (WBC) for the staff members who had returned from Fukushima started at the end of March. The measured activity of I due to inhalation for emergency staff varied from LLD to 7 kBq, which corresponded to a range of estimated initial intakes of 1 to 60 kBq when extrapolated back to the date on which the staff started the operation in Fukushima. The measured activity of Cs and Cs were both in the ranges of LLD - 3 kBq. The range of initial intake of Cs to I was 11 when taking a median from all the measurements. The maximum committed effective dose of 0.8 mSv was recorded for a worker, a member of the 2nd monitoring team dispatched from March 13 to 14.
Kurihara, Osamu*; Kanai, Katsuta; Nakagawa, Takahiro; Takada, Chie; Tsujimura, Norio; Momose, Takumaro; Furuta, Sadaaki
Journal of Nuclear Science and Technology, 50(2), p.122 - 129, 2013/02
Times Cited Count:5 Percentile:44.21(Nuclear Science & Technology)no abstracts in English
Nakagawa, Takahiro; Takada, Chie; Tsujimura, Norio
Radiation Protection Dosimetry, 146(1-3), p.140 - 143, 2011/07
Times Cited Count:0 Percentile:0.01(Environmental Sciences)Radiation workers engaging in the fabrication of MOX fuels are exposed to neutrons, and hence thermoluminescent albedo dosemeters (TLAD) need to be used at JAEA-NCL. Because estimating the doses using TLADs are susceptible to the neutron energy spectrum, the authors have issued TLADs incorporating Solid-State Nuclear Tracks Detectors (SSNTDs) to selected workers who are routinely exposed to neutrons and been analyzing the relationship between the SSNTD and the TLAD (T/Rf) over the past 6 years. Consequently, the / in each year was 10-20 (3.363 mm)/(mSv Cs eq.), which is smaller than the data during 1991-1993, although the neutron spectra had not changed compared with that of the early 1990s. This decrease of the / implies that the ratio of work carried out nearby the gloveboxes to total work decreased.
Takada, Chie; Nakagawa, Takahiro; Yoshida, Tadayoshi; Tsujimura, Norio; Takayasu, Tetsuya*
no journal, ,
no abstracts in English
Nakagawa, Takahiro; Takada, Chie; Sekine, Nobuyuki*; Takayasu, Tetsuya*; Tsujimura, Norio; Momose, Takumaro
no journal, ,
no abstracts in English
Ota, Nobuaki*; Nakagawa, Seiko*; Nishiyama, Fumitaka*; Morishita, Norio; Oshima, Takeshi
no journal, ,
A bulk with 0.5-1 mm thickness of polyaniline was irradiated by the 3MV Tandem accelerator at the Takasaki Ion Accelerators for Advanced Radiation Application (TIARA) facility. ESR spectra of N or P doped polyaniline were measured at 77 K. A broad peak of polyaniline radical was observed. Except for polyaniline radical, new signals were also appeared when the fluence of doped N was less than 210ions/cm and that of P was more than 610ions/cm.
Nakagawa, Takahiro; Takada, Chie; Sekine, Nobuyuki*; Takayasu, Tetsuya*; Tsujimura, Norio
no journal, ,
no abstracts in English
Takada, Chie; Nakagawa, Takahiro; Tsujimura, Norio
no journal, ,
Study on source term for emergency action plan on a criticality accident.
Takada, Chie; Nakagawa, Takahiro; Tsujimura, Norio; Terakado, Yoshinori*
no journal, ,
no abstracts in English
Nakagawa, Takahiro; Takada, Chie; Tsujimura, Norio; Yamazaki, Takumi; Kashimura, Shinya*
no journal, ,
no abstracts in English
Yamashita, Kiyonobu; Murakami, Hiroyuki; Nakagawa, Norio; Arai, Nobuyoshi; Matsuura, Kenichi; Ozeki, Yoshiyuki
no journal, ,
The Nuclear Human Resource Development Center of the Japan Atomic Energy Agency (NuHRDeC/JAEA) has continuously and comprehensively conducted a variety of education and training courses in the nuclear field over a half century since its establishment (1958). The main recent activities are (1) Education and training for domestic nuclear engineers, (2) Education and training for foreign nuclear engineers, (3) Cooperation with domestic universities for nuclear education, (4) Cooperation with international organization for nuclear human resource development, and (5) Central role as secretariat for Japan Nuclear Human Resource Development Network (JN-HRD Net). These recent activity is reported in the meeting.
Sawada, Makoto; Yabuuchi, Yukiko; Arai, Nobuyoshi; Kanaizuka, Seiichi; Yamashita, Kiyonobu; Nakagawa, Norio; Murakami, Hiroyuki; Nakamura, Kazuyuki
no journal, ,
Outline of International Nuclear Human Resource Development Program (Instructor Training Program: ITP), which is sponsored by MEXT, for Asian ten countries by JAEA will be reported. ITP consists of three major activities, i.e. Instructor Training Course, Follow-up Training Course and Nuclear Safety seminars. 16 years training activity from 1996 at JAEA and Asian countries has developed around 160 of instructors and more than 2,000 of trainees in Asian countries.
Nakamura, Kazuyuki; Arai, Nobuyoshi; Kanaizuka, Seiichi; Sakurai, Takeshi; Sawai, Tomotsugu; Sawada, Makoto; Nakagawa, Norio; Murakami, Hiroyuki; Yabuuchi, Yukiko; Yamashita, Kiyonobu; et al.
no journal, ,
JAEA is performing the human resource development for eleven Asian countries as contract with MEXT. Problems and their response to this works will be reported.