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Nakane, Yoshihiro; Hagiwara, Masayuki*; Iwamoto, Yosuke; Iwase, Hiroshi*; Satoh, Daiki; Sato, Tatsuhiko; Yashima, Hiroshi*; Matsumoto, Tetsuro*; Masuda, Akihiko*; Nunomiya, Tomoya*; et al.
Progress in Nuclear Science and Technology (Internet), 4, p.704 - 708, 2014/04
no abstracts in English
Tsujimura, Norio; Yoshida, Tadayoshi; Nunomiya, Tomoya*; Aoyama, Kei*
Proceedings of 12th International Congress of the International Radiation Protection Association (IRPA-12) (CD-ROM), 9 Pages, 2008/10
The authors developed a new neutron-measuring instrument that was designed to measure a neutron personal dose equivalent, H
(10). This instrument is composed of a conventional moderator-based neutron dose equivalent meter and a neutron shield made of borated polyethylene which covers a backward hemisphere to adjust the angular dependence. The whole design was determined on the basis of MCNP calculations so as to have response characteristics which would generally match both energy and angular dependencies of H(10). The verification experiments for energy and angular responses were done using monoenergetic neutrons produced by the accelerator and polyenergetic neutrons from the moderated 
Cf source. As results of experiments, it is found that this new instrument has reasonably acceptable responses as a reference neutron dosemeter.
Tsujimura, Norio; Yoshida, Tadayoshi; Takada, Chie; Nunomiya, Tomoya*; Aoyama, Kei*
Proceedings of 12th International Congress of the International Radiation Protection Association (IRPA-12) (CD-ROM), 8 Pages, 2008/10
The authors assessed performance of electronic personal neutron dosemeters (EPD). The EPD selected in this study is NRY21, manufactured by Fuji Electric Systems Co., Ltd. This dosemeter uses two silicon semiconductor detectors to provide wide measurable energy ranges from thermal to several tens of MeV. In the test, we focused on the energy and angular dependences of dose equivalent responses because it was of great importance in neutron dosimetry in work environments. Measurements of dose equivalent responses were performed in the moderated neutron field reproducing neutron spectra likely to be encountered in workplaces of MOX fuel facilities. Neutron dose equivalents given by EPD were compared with reference dose values. As a result, dose equivalent responses of this EPD were evaluated to be 0.7 to 1.1 for normal incidence of neutron irradiation. This is satisfactory performance required for personal neutron monitoring.
Tsujimura, Norio; Yoshida, Tadayoshi; Takada, Chie; Momose, Takumaro; Nunomiya, Tomoya*; Aoyama, Kei*
Radiation Protection Dosimetry, 126(1-4), p.261 - 264, 2007/08
Times Cited Count：0 Percentile：0.01(Environmental Sciences)The authors developed a new neutron measuring-instrument that was designed to measure neutron personal dose equivalent, 
(10). This detector is composed a central thermal neutron detector, a core-polyethylene moderator, a front-hemispherical polyethylene moderator and rear-hemispherical boron-contained polyethylene absorber. Dimensions of each part were determined so as to provide energy- and angular-responses close to energy- and angular-dependencies of neutron (10), based on the Monte Carlo calculations.
Sasaki, Michiya*; Nunomiya, Tomoya*; Nakamura, Takashi*; Nakao, Noriaki*; Shibata, Tokushi*; Nakane, Yoshihiro; Tanaka, Susumu
JAERI-Review 2000-024, TIARA Annual Report 1999, p.259 - 261, 2000/10
no abstracts in English
Nunomiya, Tomoya*; Kim, E.*; Kurosawa, Tadahiro*; Taniguchi, Shingo*; Nakamura, Takashi*; Tsujimura, Norio; Momose, Takumaro; Shinohara, Kunihiko
JNC TY8400 99-007, 29 Pages, 1999/03
None
(10) reference monitor for field calibration of personal neutron dosemetersTsujimura, Norio; Yoshida, Tadayoshi; Nunomiya, Tomoya*; Aoyama, Kei*
no journal, ,
no abstracts in English
Nakane, Yoshihiro; Iwamoto, Yosuke; Hagiwara, Masayuki*; Iwase, Hiroshi*; Nunomiya, Tomoya*; Sato, Tatsuhiko; Matsumoto, Tetsuro*; Masuda, Akihiko*; Yashima, Hiroshi*; Nakamura, Takashi*; et al.
no journal, ,
no abstracts in English
