Studies on hydrogen absorption-desorption proterties of U-Th-Zr alloys for developing new reactor fuel materials
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概要
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In order to develop a new U-Th mixed hydride fuel, hydrogen absorption properties of four U-Th-Zr alloys with compositions of 2 : 1 : 6, 1 : 1 : 4, 1 : 2 : 6 and 1 : 4 : 10 in U : Th : Zr ratio were examined at temperatures from 773 to 1173 K and under hydrogen pressures from 10^2 to 10^5 Pa. Hydrogen capacities normalized by the sum of Th and Zr contents of all the specimens were similar to or higher than that of U-ZrH_<2-x> alloy which has been utilized as a TRIGA fuel. Regarding the microstructure, the alloy hydrides consisted of three phases; α-U, ZrH_<2-x> and ThZr_2H_<7-x>, which are finely and homogeneously mixed with each other probably because they were formed from one solid solution phase stable at high temperatures. In the case of Th-rich alloys the α-U was about 1μm in diameter and dispersed in the bulk of ThZr_2H_<7-x> and ZrH_<2-x>. Such microstructure is quite similar to that of U-ZrH_<2-x> fuel. Hydrogen desorption properties examined on the 1 : 1 : 4 alloy showed better holding of hydrogen than ZrH_<2-x> at 1173 K.
- 東北大学の論文
- 1997-03-28
著者
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Suwarno Hadi
Nuclear Engineering Research Laboratory Faculty Of Engineering University Of Tokyo
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KAYANO Hideo
The Oarai Branch, Institute for Materials Research, Tohoku University
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YAMAMOTO Takuya
The Oarai Branch, Institute for Materials Research, Tohoku University
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Yamamoto Takuya
The Oarai Branch Institute For Materials Research Tohoku University
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Kayano Hideo
The Oarai Branch Institute For Materials Reseach Tohoku University
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Yamamoto T
The Oarai Branch Institute For Materials Research Tohoku University
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Yamawaki Michio
Nuclear Engineering Research Laboratory, Faculty of Engineering, University of Tokyo
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Yasumoto Masaru
Research Center For Nuclear Science And Technology University Of Tokyo
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Yamawaki M
Research Center For Nuclear Science And Technology University Of Tokyo
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Yamawaki Michio
Nuclear Engineering Research Laboratory Faculty Of Engineering University Of Tokyo
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Yamamoto Takuya
The Oarai Branch Institute For Materials Reseach Tohoku University
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