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Journal Articles

Improvement of heat stability of biodegradable PCL by radiation crosslinking

Yoshii, Fumio

Purasuchikku Eji, 44(10), p.144 - 147, 1998/10

no abstracts in English

Journal Articles

Phase relation of ternary system ZrO$$_{2}$$-CaO-Al$$_{2}$$O$$_{3}$$

;

Mater.Res.Bull., 21, p.61 - 67, 1986/00

 Times Cited Count:7 Percentile:53.33

no abstracts in English

Oral presentation

Chemical impacts of boron on the cesium release and transport behavior under severe accident conditions, 3; Preparation and phase relation of Cs$$_{2}$$O-B$$_{2}$$O$$_{3}$$ system

Nakajima, Kunihisa; Takai, Toshihide; Furukawa, Tomohiro; Osaka, Masahiko

no journal, , 

There are limited thermodynamic data available for compounds in the Cs-B-O system. We have a plan to evaluate the thermodynamic properties of the cesium borates from their equilibrium vapor pressures determined by a Knudsen effusion mass spectrometry. Cesium borates such as triborate, CsB$$_{3}$$O$$_{5}$$, were prepared and phase relations in the Cs-B-O system were investigated using a powder X-ray diffractometer. As one of the results, it was found that CsB$$_{3}$$O$$_{5}$$ has an orthorhombic crystal structure.

Oral presentation

Characterization of fuel debris (27'A), 5; Phase evaluation of simulated debris prepared by melting (U, Pu, Zr)O$$_{2}$$ with iron

Akashi, Masatoshi; Morimoto, Kyoichi; Kato, Masato

no journal, , 

no abstracts in English

Oral presentation

Characterization of fuel debris (27'A), 4; Characterization of simulated corium debris bearing Gd

Morimoto, Kyoichi; Hirooka, Shun; Akashi, Masatoshi; Watanabe, Masashi; Komeno, Akira; Ogasawara, Masahiro*

no journal, , 

The influence of Gd on these characteristics is important for the prediction because subassemblies of Gd-bearing uranium oxide fuels were loaded in the some reactor cores of Fukushima Daiichi Nuclear Power Plant. Additionally, it is important to comprehend the placement of Gd in the debris from the view point of the re-criticality by relocation of the debris during removing the debris. In this study, U, Gd and Zr mixed oxide specimens were fabricated by the conventional powder metallurgy process and these specimens were melted and solidified to prepare simulated corium debris bearing Gd (sim-debris). Melting point and thermal conductivities of sim-debris were measured. X-ray diffraction analysis and electron probe microanalysis were conducted to evaluate the phase states.

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