期刊
PLASMA AND FUSION RESEARCH
卷 11, 期 -, 页码 -出版社
JAPAN SOC PLASMA SCIENCE & NUCLEAR FUSION RESEARCH
DOI: 10.1585/pfr.11.2405076
关键词
liquid blanket; liquid breeder; liquid metal; non-metal impurity; temperature programmed desorption mass spectrometer
资金
- JSPS KAKENHI [25820437]
- National Institute for Fusion Science [NIFS14KOBF028]
- Japan Atomic Energy Agency [27K395]
- Grants-in-Aid for Scientific Research [16H04617] Funding Source: KAKEN
The chemical behaviors of non-metal impurities such as O-2, H-2, N-2, H2O, CO2 and CO in lead (Pb) metal, lead-bismuth (Pb-Bi) alloy and lead-lithium (Pb-Li) alloys were experimentally investigated by means of temperature programmed desorption mass spectrometer (TPD-MS) analysis. Desorption of H2O and CO2 from the Pb metal and the Pb-Bi alloy was clearly detected by TPD-MS analysis. However, desorption of H2O and CO2 from the Pb-Li alloys was much less than that from the Pb metal and the Pb-Bi alloy, since these molecules are chemically unstable and react with Li in the Pb-Li alloys. Then, oxygen and hydrogen must be dissolved in Pb-Li alloys as they form the chemical compounds of Li (i.e., Li2O, LiOH and LiH). Large desorption of hydrogen from solid Pb-Li alloys by their heating was detected. The possible mechanism for the large desorption of hydrogen from the Pb-Li alloys is based on the decomposition of LiH and Pb-Li-H at high temperature. The chemical behaviors of the non-metal impurities in the Pb-Li alloys was modeled based on the thermodynamic stability. The methodologies for the fabrication of high-purity Pb-Li alloys and the control of the impurity condition are discussed. (C) 2016 The Japan Society of Plasma Science and Nuclear Fusion Research
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