| NUCLEAR MATERIALS |
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| Preliminary Experiment Study on Control of Oxygen Concentration via Gas Phase in Liquid Lead-Bismuth Alloy |
| QIN Bo, FU Xiaogang, MA Haoran, ZHANG Jinquan, REN Lixia, LONG Bin
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| China Institute of Atomic Energy, Beijing 102413 |
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Abstract In order to avoid the precipitation of PbO and form a stable Fe3O4 protective layer, the oxygen in lead-bismuth eutectic (LBE) alloy need be controlled in a certain range due to the heavy corrosion of LBE on structural materials. In this study, based on the principle of oxygen control via gas phase, an oxygen control facility for stagnant LBE is designed and assembled used to investigate the gas oxygen control technology. The preliminary test results show that the eletromotive force (EMF) of oxygen sensor increases with the increment of the H2/H2O ratio in volume, indicating the decreases of oxygen concentration in LBE, and that at a specific H2/H2O ratio the oxygen concentration can be stabilized at a certain level. Therefore, through controlling and adjusting the H2/H2O ratio in cover gas of LBE, the oxygen concentration can be controlled in a certain range. This technique is expected to be used for the oxygen concentration control in the compatibility tests of LBE with structural materials and LBE dynamic loops.
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Published: 21 May 2019
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| Fund:This work was financially supported by the National Natural Science Foundation of China (91426301). |
| About author:: Bo Qin received his B.E. degree in metallic materials engineering from Dalian University of Technology in 2006, and M.E. degree in materials science and engineering from Tsinghua University in 2010. He is currently working at China Institute of Atomic Energy (CIAE) as a senior engineer and focusing in lead-bismuth eutectic (LBE) application for fast breeder reactor.Bin Long, Ph.D. of the Ecole Polytechnique Fédérale de Lausanne (EPFL), a professor of China Institute of Atomic Energy (CIAE), focus on the research of nuclear reactor structural materials and liquid metal coo-lant technology for fast breeder reactors. |
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2019, Vol. 33 
