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JAEA Reports

Analysis of the radioactivity concentrations in low-level radioactive waste generated from JPDR facilities, 4

Omori, Hiroyuki; Nebashi, Koji; Shimada, Asako; Tanaka, Kiwamu; Yasuda, Mari; Hoshi, Akiko; Tsuji, Tomoyuki; Ishimori, Kenichiro; Kameo, Yutaka

JAEA-Data/Code 2014-029, 31 Pages, 2015/03

JAEA-Data-Code-2014-029.pdf:1.51MB

Simple and rapid methods to evaluate the radioactivity concentrations are required for the radioactive waste generated from research facilities in the Japan Atomic Energy Agency to dispose of in a near-surface repository. In order to establish the methods to evaluate the radioactivity concentrations of miscellaneous solid waste generated from research and testing reactors, we collected and analyzed samples from miscellaneous solid waste generated by the decommissioning of JPDR (Japan Power Demonstration Reactor). In this report, we reported the analytical data determined in fiscal 2014 ($$^{137}$$Cs and $$^{93}$$Mo) and summarized them with the radioactivity concentrations obtained in the past as basic data to consider the evaluation method of radioactivity concentrations in the stored waste taken from JPDR.

JAEA Reports

Analysis of the radioactivity concentrations in low-level radioactive waste generated from JPDR facilities, 3

Yasuda, Mari; Tanaka, Kiwamu; Watanabe, Koichi; Hoshi, Akiko; Tsuji, Tomoyuki; Kameo, Yutaka

JAEA-Data/Code 2014-011, 59 Pages, 2014/08

JAEA-Data-Code-2014-011.pdf:16.84MB

Simple and rapid methods to evaluate the radioactivity concentrations are required to be established for the near surface disposal of radioactive wastes generated from research facilities at Japan Atomic Energy Agency. In order to establish the methods to evaluate the radioactivity concentrations of miscellaneous solid wastes generated from research and testing reactors, we collected and analyzed samples from miscellaneous solid wastes generated by the decommissioning of JPDR (Japan Power Demonstration Reactor). In the present paper, we summarized data about the radioactivity concentrations which accumulated by the analysis.

Journal Articles

Radiochemical analysis of rubble and trees collected from Fukushima Daiichi Nuclear Power Station

Tanaka, Kiwamu; Shimada, Asako; Hoshi, Akiko; Yasuda, Mari; Ozawa, Mayumi; Kameo, Yutaka

Journal of Nuclear Science and Technology, 51(7-8), p.1032 - 1043, 2014/07

 Times Cited Count:16 Percentile:12.97(Nuclear Science & Technology)

Journal Articles

Determination method using liquid scintillation counter for $$^{113m}$$Cd in wastewater in Fukushima-1 Nuclear Power Plant

Yasuda, Mari; Nebashi, Koji*; Yonekawa, Naoki; Yasumatsu, Takuyo*; Kameo, Yutaka

Bunseki Kagaku, 63(4), p.345 - 350, 2014/04

 Times Cited Count:0 Percentile:100(Chemistry, Analytical)

A simple analytical method was developed for the determination of $$^{113m}$$Cd in the treated wastewater arising from Advanced Liquid Processing System (ALPS) at the Fukushima-1 nuclear power plant. Cadmium in the wastewater containing sea salt was effectively purified by an anion-exchange procedure. It was found that more than 97% of Cd were recovered by the present procedure from a sample solution of 2M HCl. Since a radioactivity standard solution of $$^{113m}$$Cd was difficult to purchase from venders, beta-ray counting efficiency for $$^{113m}$$Cd was estimated using 99Tc and 36Cl standard solutions. Minimum detectable activity was calculated to be 0.003 Bq mL$$^{-1}$$. The present analytical method would be well suited for a rapid and simple determination of $$^{113m}$$Cd in wastewater treated by ALPS.

JAEA Reports

Analysis of the radioactivity concentrations in low-level radioactive waste generated from JPDR facilities, 2

Tanaka, Kiwamu; Yasuda, Mari; Watanabe, Koichi; Hoshi, Akiko; Tsuji, Tomoyuki; Higuchi, Hidekazu

JAEA-Data/Code 2013-008, 16 Pages, 2013/11

JAEA-Data-Code-2013-008.pdf:2.41MB

Simple and rapid methods to evaluate the radioactivity concentrations are required to be established for the near surface disposal of radioactive wastes generated from research facilities at Japan Atomic Energy Agency. In order to establish the methods to evaluate the radioactivity concentrations of miscellaneous solid wastes generated from research and testing reactors, we collected and analyzed samples from miscellaneous solid wastes generated by the decommissioning of JPDR (Japan Power Demonstration Reactor). In the present paper, we summarized data about the radioactivity concentrations which accumulated by the analysis.

JAEA Reports

Analysis of the radioactivity concentrations in low-level radioactive waste generated from JPDR facilities

Hoshi, Akiko; Tsuji, Tomoyuki; Tanaka, Kiwamu; Yasuda, Mari; Watanabe, Koichi; Sakai, Akihiro; Kameo, Yutaka; Kogure, Hiroto; Higuchi, Hidekazu; Takahashi, Kuniaki

JAEA-Data/Code 2011-011, 31 Pages, 2011/10

JAEA-Data-Code-2011-011.pdf:1.7MB

Simple and rapid methods to evaluate the radioactivity concentrations are required to be established for the near surface disposal of radioactive wastes generated from research facilities at Japan Atomic Energy Agency. In order to establish the methods to evaluate the radioactivity concentrations of miscellaneous solid wastes generated from research and testing reactors, we collected and analyzed samples from miscellaneous solid wastes generated by the decommissioning of JPDR (Japan Power Demonstration Reactor). In the present paper, we summarized data (262 data) about the radioactivity concentrations of the 7 important nuclides ($$^{3}$$H, $$^{14}$$C, $$^{60}$$Co, $$^{59}$$Ni, $$^{63}$$Ni, $$^{90}$$Sr, $$^{137}$$Cs) which accumulated by the analysis.

Oral presentation

Development of multi pinhole collimator for neutron radiography

Hayashida, Hirotoshi; Segawa, Mariko; Yasuda, Ryo; Iikura, Hiroshi; Sakai, Takuro; Matsubayashi, Masahito

no journal, , 

Improvement of spatial resolution is common needs of users of in neutron radiography (NR) in various research fields such as materials, fuel cell, architecture, and so on. High collimator ratio (L/D) is one of the most significant factors for high spatial resolution imaging, because size of the geometric unsharpness formed on an image is inversely proportional to L/D. Small aperture collimator system is effective for increasing L/D of neutron radiography system. In case of using aperture with a diameter of 2 mm on thermal neutron radiography facility (TNRF) in JRR-3, the irradiation area is 20 by 20 mm, being not enough area to view large size samples. We develop a multi pinhole collimator system in order to enlarge the visible area.

Oral presentation

Development of multi pinhole aperture for improving spatial resolution with wide imaging area

Hayashida, Hirotoshi; Segawa, Mariko; Yasuda, Ryo; Iikura, Hiroshi; Sakai, Takuro; Matsubayashi, Masahito

no journal, , 

Improvement of spatial resolution is common needs of users of in neutron radiography (NR) in various research fields such as materials, fuel cell, architecture, and so on. High collimator ratio (L/D) is one of the most significant factors for high spatial resolution imaging, because size of the geometric unsharpness formed on an image is inversely proportional to L/D. Small aperture collimator system is effective for increasing L/D of neutron radiography system. In case of using a small aperture system on thermal neutron radiography facility (TNRF) in JRR-3, the imaging area is 20 mm by 20 mm, being not enough area to view large size samples. We are developing multi pinhole collimator in order to spread imaging area with high L/D.

Oral presentation

Development of multi-pinhole collimator for large imaging area with high spatial resolution

Hayashida, Hirotoshi; Segawa, Mariko; Yasuda, Ryo; Iikura, Hiroshi; Sakai, Takuro; Matsubayashi, Masahito

no journal, , 

Improvement of spatial resolution is common needs of users of in neutron radiography (NR) in various research fields such as materials, fuel cell, architecture, and so on. High collimator ratio (L/D) is one of the most significant factors for high spatial resolution imaging, because size of the geometric unsharpness formed on an image is inversely proportional to L/D. Small aperture collimator system is effective for increasing L/D of neutron radiography system. In case of using a small aperture system on thermal neutron radiography facility (TNRF) in JRR-3, the irradiation area is around 20 by 20mm, being not enough area to view large size samples. We develop a multi-pinhole collimator system in order to increase the visible area with high spatial resolution.

Oral presentation

Pulse neutron imaging experiments in the first year of J-PARC

Kai, Tetsuya; Harada, Masahide; Oikawa, Kenichi; Sakai, Kenji; Maekawa, Fujio; Oi, Motoki; Shinohara, Takenao; Aizawa, Kazuya; Takata, Shinichi; Arai, Masatoshi; et al.

no journal, , 

Development of imaging techniques with pulse neutrons were started using the NeutrOn Beam-line for Observation and Research Use (NOBORU) of J-PARC at December 2008. The results in the first three months, future research plans and discussions on a new imaging facility in J-PARC are shown.

Oral presentation

$$^{94}$$Nb analysis of metal waste samples generated from reactor facilities

Tanaka, Kiwamu; Yasuda, Mari; Haraga, Tomoko; Hoshi, Akiko; Kogure, Hiroto

no journal, , 

no abstracts in English

Oral presentation

Radiochemical analysis in stagnant water in Fukushima-1 Nuclear Power Plant, 2; Analysis of Se-79, Sr-90, Tc-99

Yasuda, Mari; Watanabe, Koichi; Hoshi, Akiko; Tanaka, Kiwamu; Kameo, Yutaka; Katayama, Atsushi; Higuchi, Hidekazu

no journal, , 

Analytical methods were developed for determination of Se-79, Sr-90 and Tc-99 in stagnant water generated from Fukushima-1 Nuclear Power Plant. The recoveries of these elements were enough to determine the concentrations of Se-79, Sr-90 and Tc-99. The interference of beta emitter could not be found by beta spectrometry. The present method could be applied to stagnant water.

Oral presentation

Present status of a new pulsed neutron imaging instrument in J-PARC MLF

Shinohara, Takenao; Kai, Tetsuya; Segawa, Mariko; Oi, Motoki; Oikawa, Kenichi; Harada, Masahide; Nakatani, Takeshi; Sakai, Kenji; Iikura, Hiroshi; Aizawa, Kazuya; et al.

no journal, , 

no abstracts in English

Oral presentation

Study on the radiochemical method in stagnant water in Fukushima-1 Nuclear Power Plant

Tanaka, Kiwamu; Yasuda, Mari; Watanabe, Koichi; Hoshi, Akiko; Katayama, Atsushi; Higuchi, Hidekazu; Kameo, Yutaka

no journal, , 

no abstracts in English

Oral presentation

Present status of a new pulsed neutron imaging instrument at J-PARC

Segawa, Mariko; Shinohara, Takenao; Kai, Tetsuya; Iikura, Hiroshi; Oi, Motoki; Oikawa, Kenichi; Harada, Masahide; Sakai, Kenji; Soyama, Kazuhiko; Aizawa, Kazuya; et al.

no journal, , 

Oral presentation

Radiochemical analysis of waste debris and stagnant water in Fukushima-1 Nuclear Power Plant, 2; Analysis of Se-79, Tc-99, I-129, and $$alpha$$-particle emitting nuclides

Hoshi, Akiko; Yasuda, Mari; Yonekawa, Naoki; Kajio, Masatoshi; Niiyama, Takuya; Yabuki, Koshi; Shimada, Asako; Kameo, Yutaka

no journal, , 

no abstracts in English

Oral presentation

Radiochemical analysis for treatment and disposal of rubble and trees generated by the Fukushima-1 nuclear power plant accident

Kameo, Yutaka; Tanaka, Kiwamu; Yasuda, Mari; Shimada, Asako; Ueno, Takashi; Hoshi, Akiko

no journal, , 

no abstracts in English

Oral presentation

Radiochemical analysis of living tree collected from Fukushima-1 Nuclear Power Station

Tanaka, Kiwamu; Ueno, Takashi; Yasuda, Mari; Shimada, Asako; Hoshi, Akiko; Kameo, Yutaka

no journal, , 

no abstracts in English

18 (Records 1-18 displayed on this page)
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