Solidus and liquidus of plutonium and uranium mixed oxide

Masato Kato; Kyoichi Morimoto; Hiromasa Sugata; Kenji Konashi; Motoaki Kashimura; Tomoyuki Abe

doi:10.1016/j.jallcom.2007.01.183

Solidus and liquidus of plutonium and uranium mixed oxide

Masato Kato, Kyoichi Morimoto, Hiromasa Sugata, Kenji Konashi, Motoaki Kashimura, Tomoyuki Abe

International Research Center for Nuclear Materials Science

Research output: Contribution to journal › Article

24 Citations (Scopus)

Abstract

Solidus and liquidus of mixed oxides of plutonium and uranium were measured as a function of Pu-content and oxygen-to-metal ratio using the thermal arrest technique. The solidus and the liquidus were observed to decrease with increasing Pu-content and to slightly increase with decreasing oxygen-to-metal ratio in the region of hypo-stoichiometric composition. The solidus of UO_2.00, (Pu_0.12U_0.88)O_2.00 and (Pu_0.2U_0.8)O_2.00 were determined as 3128, 3077 and 3052 K, respectively. The solidus and the liquidus of the mixed oxides with 29 and 40 at% Pu were also measured. It was observed that a reaction with the tungsten capsule occurred during the measurement. Therefore, the solidus and the liquidus of the oxides with 29 and 40 at% Pu could not be obtained.

Original language	English
Pages (from-to)	48-53
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	452
Issue number	1
DOIs	https://doi.org/10.1016/j.jallcom.2007.01.183
Publication status	Published - 2008 Mar 6

Keywords

Actinide alloys and compounds
Nuclear materials
Oxide materials
Phase diagrams
Thermal analysis

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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Kato, M., Morimoto, K., Sugata, H., Konashi, K., Kashimura, M., & Abe, T. (2008). Solidus and liquidus of plutonium and uranium mixed oxide. Journal of Alloys and Compounds, 452(1), 48-53. https://doi.org/10.1016/j.jallcom.2007.01.183

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abstract = "Solidus and liquidus of mixed oxides of plutonium and uranium were measured as a function of Pu-content and oxygen-to-metal ratio using the thermal arrest technique. The solidus and the liquidus were observed to decrease with increasing Pu-content and to slightly increase with decreasing oxygen-to-metal ratio in the region of hypo-stoichiometric composition. The solidus of UO2.00, (Pu0.12U0.88)O2.00 and (Pu0.2U0.8)O2.00 were determined as 3128, 3077 and 3052 K, respectively. The solidus and the liquidus of the mixed oxides with 29 and 40 at% Pu were also measured. It was observed that a reaction with the tungsten capsule occurred during the measurement. Therefore, the solidus and the liquidus of the oxides with 29 and 40 at% Pu could not be obtained.",

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AU - Kato, Masato

AU - Morimoto, Kyoichi

AU - Sugata, Hiromasa

AU - Konashi, Kenji

AU - Kashimura, Motoaki

AU - Abe, Tomoyuki

PY - 2008/3/6

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N2 - Solidus and liquidus of mixed oxides of plutonium and uranium were measured as a function of Pu-content and oxygen-to-metal ratio using the thermal arrest technique. The solidus and the liquidus were observed to decrease with increasing Pu-content and to slightly increase with decreasing oxygen-to-metal ratio in the region of hypo-stoichiometric composition. The solidus of UO2.00, (Pu0.12U0.88)O2.00 and (Pu0.2U0.8)O2.00 were determined as 3128, 3077 and 3052 K, respectively. The solidus and the liquidus of the mixed oxides with 29 and 40 at% Pu were also measured. It was observed that a reaction with the tungsten capsule occurred during the measurement. Therefore, the solidus and the liquidus of the oxides with 29 and 40 at% Pu could not be obtained.

AB - Solidus and liquidus of mixed oxides of plutonium and uranium were measured as a function of Pu-content and oxygen-to-metal ratio using the thermal arrest technique. The solidus and the liquidus were observed to decrease with increasing Pu-content and to slightly increase with decreasing oxygen-to-metal ratio in the region of hypo-stoichiometric composition. The solidus of UO2.00, (Pu0.12U0.88)O2.00 and (Pu0.2U0.8)O2.00 were determined as 3128, 3077 and 3052 K, respectively. The solidus and the liquidus of the mixed oxides with 29 and 40 at% Pu were also measured. It was observed that a reaction with the tungsten capsule occurred during the measurement. Therefore, the solidus and the liquidus of the oxides with 29 and 40 at% Pu could not be obtained.

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