Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Miyachi, Shigehiko
Enerugi Rebyu, 37(10), p.19 - 20, 2017/09
The JAEA is currently constructing the Okuma Analysis and Research Center near the TEPCO's Fukushima Daiichi Nuclear Power Station site. These are consists of three buildings; Administrative building and hot laboratories; Laboratory-1 and Laboratory-2. Radioactive analysis in hot laboratories will provide the data needed to establish the strategy and methodology for treatment and disposal of radioactive rubbles, and for the removal methods of fuel debris in the reactors.
Nakahara, Masaumi; Sano, Yuichi; Miyachi, Shigehiko; Koizumi, Tsutomu; Koyama, Tomozo; Aose, Shinichi
JAEA-Research 2006-030, 43 Pages, 2006/06
Concerning the advanced aqueous reprocessing system, the simplified solvent extraction process for U, Pu and Np co-recovery has been investigated. We carried out the counter-current experiment, which aimed for Np oxidation and extraction by high [HNO] condition. For preventing Np leakage to the raffinate, feed solution and scrubbing solution with high [HNO] were used, which would bring high [HNO] in the extraction section and efficient Np oxidation and extraction in this section. In addition, high [HNO] in the feed solution could help the pre-oxidation of Np to extractable Np(VI). In the steady state, the Np leakage to the raffinate could be kept under about 1%. The stage efficiencies for these elements were estimated by fitting the concentration profiles calculated by MIXSET-X into the experimental results. The stage efficiency of U, Pu and Np were evaluated 100%, 100% and 98.5% in the extraction section and 95%, 90% and 89% in the stripping section respectively.
Sano, Yuichi; Miyachi, Shigehiko; Koizumi, Tsutomu; Koyama, Tomozo
Proceedings of International Conference on Nuclear Energy System for Future Generation and Global Sustainability (GLOBAL 2005) (CD-ROM), 8 Pages, 2005/10
Dissolution behavior of the irradiated MOX fuel was investigated under high Heavy Metal concentration condition for the feed solution of the crystallization process.
Miura, Sachiko; Kamiya, Masayoshi; Nomura, Kazunori; Miyachi, Shigehiko; Koyama, Tomozo; Ogumo, Shinya*; Shimada, Takashi*
Abstracts P.30, 30 Pages, 2003/00
None
; Miyachi, Shigehiko; ;
Proceedings of 10th International Conference on Nuclear Engineering (ICONE-10), 0 Pages, 2002/00
None
Aose, Shinichi; Ogasawara, Koji; Nomura, Kazunori; Miyachi, Shigehiko; Ichige, Yoshiaki; Shinozaki, Tadahiro; Ouchi, Shinichi; Kitajima, Takafumi
no journal, ,
no abstracts in English
Aose, Shinichi; Kitajima, Takafumi; Ogasawara, Koji; Nomura, Kazunori; Miyachi, Shigehiko; Ichige, Yoshiaki; Shinozaki, Tadahiro; Ouchi, Shinichi; Nabemoto, Toyonobu*; Katahira, Fujio*; et al.
no journal, ,
no abstracts in English
Miyachi, Shigehiko; Nakahara, Masaumi; Sano, Yuichi; Nomura, Kazunori; Kitajima, Takafumi; Koizumi, Tsutomu
no journal, ,
The hot experiments on solvent extraction conducted in the Chemical Processing Facility (CPF) has demonstrated that the oxidation of Np in the feed solution from Np(V) to Np(VI) by making the acidity higher than conventional condition is effective in the co-recovery of U, Pu and Np so far. Furthermore, it was confirmed that Np was quantitatively recovered with U and Pu by applying of highly acidic scrubbing solution under the conventional condition of the acidity of the feed solution. The main results obtained are presented in this report.
Nomura, Kazunori; Oyama, Koichi; Ouchi, Shinichi; Miyachi, Shigehiko; Kitajima, Takafumi; Koizumi, Tsutomu
no journal, ,
no abstracts in English
Nomura, Kazunori; Nakahara, Masaumi; Sano, Yuichi; Kamiya, Masayoshi; Miyachi, Shigehiko; Koizumi, Tsutomu
no journal, ,
no abstracts in English
Ouchi, Shinichi; Shibata, Atsuhiro; Nomura, Kazunori; Miyachi, Shigehiko; Kitajima, Takafumi; Koizumi, Tsutomu
no journal, ,
no abstracts in English
Nomura, Kazunori; Oyama, Koichi; Ouchi, Shinichi; Miyachi, Shigehiko; Washiya, Tadahiro; Koizumi, Tsutomu
no journal, ,
no abstracts in English