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Minowa, Kazuki*; Watanabe, So; Nakase, Masahiko*; Takahatake, Yoko; Miyazaki, Yasunori; Ban, Yasutoshi; Matsuura, Haruaki*
Nuclear Instruments and Methods in Physics Research B, 556, p.165496_1 - 165496_6, 2024/11
Times Cited Count:0 Percentile:0.00(Instruments & Instrumentation)In this study, X-ray absorption near edge structure (XANES) spectral analysis and column experiments were used to verify the selectivity of rare earth (RE) ions by alkyl diamide amine (ADAAM) adsorbent. In addition, the interactions between the N atoms of ADAAM and RE ions were evaluated to determine whether any of the RE ions are a valid simulant for developing a mutual separation process for minor actinides (MAs) in highly radioactive liquid waste. It was confirmed that La and Ce interacted with the amine N atom of ADAAM and they showed a peak shift of the N-K edge XANES spectrum; this finding suggested that a soft interaction is an essential factor influencing ion selectivity. Therefore, the selection factor of RE ions by ADAAM adsorbent was similar to that of MAs. It was concluded that RE ions are reasonable species to simulate MAs.
Sugino, Kazuteru; Takino, Kazuo
JAEA-Data/Code 2019-011, 110 Pages, 2020/01
A deterministic discrete ordinates method (SN method) transport calculation code for three-dimensional hexagonal geometry has been developed as the MINISTRI code (Ver. 7.0). MINISTRI is based on the triangle-mesh finite difference method, which can perform neutron transport calculations with high accuracy for cores of fast power reactors and assemblies of the Russian BFS critical facility. The present study has derived a proper scheme for remarkably improving the convergence of MINISTRI by investigating the issue of previous MINISTRI (Ver. 1.1), which sometimes plays a poor convergence performance in calculations for large-scale power reactor cores. The verification test of improved MINISTRI has been carried out for various cores by setting the reference result as the multi-group Monte-Carlo calculation with the same cross-sections as used in MINISTRI. As a result, it is found that the agreements are within 0.1% for eigenvalues and within 0.7% for power distributions. Thus, the satisfying accuracy of MINISTRI has been confirmed. In order to reduce the calculation time, the initial diffusion calculation scheme and the parallel processing have been implemented. As a result, the calculation time is reduced to the approximately one tenth compared with previous MINISTRI. Furthermore, adoption of the treatment of the anisotropic cell streaming effect, preparation of the perturbation calculation tool, implementation of the function for specification of the triangle-mesh-wise material and merging of the hexagonal-mesh calculation code MINIHEX have been carried out. Thus, the versatility of MINISTRI has been enhanced.
Tokuda, Shinji
Purazuma, Kaku Yugo Gakkai-Shi, 77(3), p.276 - 283, 2001/03
no abstracts in English
Koizumi, Norikiyo; ; Takahashi, Yoshikazu; Tsuji, Hiroshi
IEEE Transactions on Applied Superconductivity, 7(2), p.219 - 222, 1997/06
Times Cited Count:2 Percentile:29.16(Engineering, Electrical & Electronic)no abstracts in English
Yamazawa, Hiromi
Journal of Nuclear Science and Technology, 33(1), p.69 - 77, 1996/01
Times Cited Count:5 Percentile:44.68(Nuclear Science & Technology)no abstracts in English
Watanabe, Tadashi; Hirano, Masashi;
Journal of Nuclear Science and Technology, 30(10), p.1078 - 1083, 1993/10
Times Cited Count:1 Percentile:18.58(Nuclear Science & Technology)no abstracts in English
Journal of Nuclear Science and Technology, 22(7), p.565 - 583, 1985/00
Times Cited Count:38 Percentile:95.33(Nuclear Science & Technology)no abstracts in English
JAERI-M 84-017, 119 Pages, 1984/02
no abstracts in English
;
Joho Shori Gakkai Rombunshi, 24(1), p.8 - 14, 1983/00
no abstracts in English
; ; ;
JAERI-M 82-080, 18 Pages, 1982/07
no abstracts in English
; ;
Journal of Nuclear Science and Technology, 18(8), p.571 - 580, 1981/00
Times Cited Count:5 Percentile:57.83(Nuclear Science & Technology)no abstracts in English
; ; ; ;
Journal of Nuclear Science and Technology, 14(8), p.541 - 550, 1977/08
Times Cited Count:3no abstracts in English
Watanabe, Tsuyoshi; Asamori, Koichi
no journal, ,
no abstracts in English