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Nakahara, Masaumi; Watanabe, So; Ogi, Hiromichi*; Arai, Yoichi; Aihara, Haruka; Motoyama, Risa; Shibata, Atsuhiro; Nomura, Kazunori; Kajinami, Akihiko*
Proceedings of International Nuclear Fuel Cycle Conference / Light Water Reactor Fuel Performance Conference (Global/Top Fuel 2019) (USB Flash Drive), p.66 - 70, 2019/09
A wide variety of hazardous and radioactive liquid waste has generated derived from an advanced aqueous separation experiments in the Chemical Processing Facility. Therefore, they should be stabilized for the safety handling and management. In this study, we report a precipitation or an oxidation for hazardous materials, a solvent extraction for recovery of nuclear materials, and a concentration of solution by a freeze-drying method.
Nakahara, Risa; Hanaya, Hiroaki; Hirota, Koichi; Negishi, Mitsuharu; Haruyama, Yasuyuki; Takizawa, Haruki; Shidomi, Kenji
no journal, ,
The facilities of JAEA are widely opened to many outside researchers in universities, public institutes, industries, and so on. FACILITY USE PROGRAM started in 2006, which is the system for users' service on fee-charging basis in the use of facilities. The facilities used in Takasaki at the system are Co-60 Gamma-ray Irradiation Facilities, Electron Accelerator, TIARA's accelerators, and some of the off-line analysis instruments.
Nakahara, Kaito*; Kawada, Rio*; Irisawa, Eriko; Ueda, Mitsutoshi*; Kawamura, Kenichi*
no journal, ,
In order to develop oxygen sensor using oxide scales formed on the surface of zirconium alloy, we focused on zirconium and copper alloy system. It was expected that the oxide scale of Zr oxide on the alloy is thin and elaborate compared with that on the pure Zr because the activity of Zr in the alloy is reduced and the oxidation rate of alloy become slow. Therefore the oxidation behavior and mechanism of two phase alloy, Zr-35Cu which is composed of Zr
Cu and Zr
Cu
, was studied. The results showed the oxidation rate of the alloy was same with that of the pure Zr.