MPS-based axisymmetric particle method for bubble rising with density and pressure discontinuity

Wang, Z.; Sugiyama, Tomoyuki

Engineering Analysis with Boundary Elements, 144, p.279 - 300, 2022/11

https://doi.org/10.1016/j.enganabound.2022.08.020

Preparation of solid phase extraction cartridges for trace analysis of radionuclides

Asai, Shiho; Saito, Kyoichi*

Biomedical Research on Trace Elements, 28(1), p.1 - 10, 2017/04

Radionuclides are commonly determined with radiometry and mass spectrometry. For -emitting nuclides, the activities can be measured without chemical separation due to the strong penetration ability. In contrast, the measurements of alpha and beta-emitting nuclides are generally associated with tedious and time-consuming chemical separation procedures to remove concomitants. Thus, an adsorbent that achieves rapid separation is desirable to reduce separation time and workload. Our research team has developed compact cartridge-type solid phase extraction materials which enable to facilitate separation procedures. In this review, basic separation performances of the developed cartridges were overviewed along with two application examples to radionuclide-containing samples.

Oceanic dispersion simulations of Cs released from the Fukushima Daiichi Nuclear Power Plant

Masumoto, Yukio*; Miyazawa, Yasumasa*; Tsumune, Daisuke*; Tsubono, Takaki*; Kobayashi, Takuya; Kawamura, Hideyuki; Estournel, C.*; Marsaleix, P.*; Lanerolle, L.*; Mehra, A.*; et al.

Elements, 8(3), p.207 - 212, 2012/06

https://doi.org/10.2113/gselements.8.3.207

Present status of oceanic dispersion simulations of cesium 137 (Cs) directly discharged from Fukushima Daiichi Nuclear Power Plant are reviewed using five model outputs and other available informations, focusing on estimations of discharged amount of Cs and subsequent dispersion in a region off Fukushima during March and April, 2011. Common aspects and discrepancies among the simulated results are described. While the discharged amount spreads from about 1 to 27 P Bq of Cs among the estimates, the values obtained from the five models indicate 2 to 4 P Bq. With these total amounts and time evolutions of the discharge rate, mimicking observed Cs concentration near FDNPP, as a source for the dispersion calculation, all the five models simulated the Cs dispersion in the ocean reasonably well corresponding to the observed distributions.

Solubility Product of Tetravalent Neptunium in the Reducing Condition

Fujiwara, Kenso; Kohara, Yukitoshi*

Advanced Science Research(ARS2004) Advances in Heavy Elements Microbiology Research p.37, P. 37, 2004/00

Focusing on the cover layer materials (as the Radon Barrier Materials), which could have the effect to restrain the radon from scattering into the air and the effect of the radiation shielding, we produced the radon barrier materials with crude bentonite on an experimental basis, using the rotary type comprehensive unit for grinding and mixing, through which we carried out the evaluation of the characteristics thereof.

Reactivity between humic substances isolated from groundwater and metals by three-dimensional fluorescence spectrometry

Imanaka, Masayo*; Nagao, Seiya; Nakaguchi, Yuzuru*; Yamaguchi, Yoshitaka*; Suzuki, Yasuhiro*; Murakami, Masahiro*; Hiraki, Keizo*

Proceedings of International Conference on the Biogeochemistry of Trace Elements (ICOBTE2001), P. 662, 2001/00

no abstracts in English

Aqueous chemistry with seaborgium (element 106)

Brchle, W.*; Andrassy, M.*; Angert, R.*; Eberhardt, K.*; Fricke, B.*; Gregorich, K. E.*; Gnther, R.*; Hartmann, W.*; Heimann, R.*; Hoffman, D. C.*; et al.

1st International Conference on the Chemistry and Physics of the Transactinide Elements; Extended Abstracts, 4 Pages, 1999/00

no abstracts in English

Decay properties of neutron-deficient actinide isotopes

Sakama, Minoru*; Tsukada, Kazuaki; Asai, Masato; Ichikawa, Shinichi; Oura, Yasuji*; Osa, Akihiko; Shibata, Michihiro*; Nishinaka, Ichiro; Nagame, Yuichiro; Ebihara, Mitsuru*; et al.

1st International Conference on the Chemistry and Physics of the Transactinide Elements; Extended Abstracts, 4 Pages, 1999/00

no abstracts in English

Uptake of heavy water vapor from atmosphere by plant leaves as a function of stomatal resistance

Atarashi, Mariko; Amano, Hikaru; Ichimasa, Michiko*; Ichimasa, Yusuke*;

Proc. of Int. Meeting on Influence of Climatic Characteristics upon Behavior of Radioactive Elements, p.236 - 242, 1997/00

no abstracts in English

Multiple reciprocity boundary element formulation for one-group fission neutron source iteration problems

; C.A.Brebbia*

Engineering Analysis with Boundary Elements,11, p.39 - 45, 1993/00

no abstracts in English

Dual and multiple reciprocity formulations applied to fission neutron source problems

; C.A.Brebbia*

Boundary Elements XIV, Vol.1; Field Problems and Applications, p.25 - 38, 1992/00

no abstracts in English