Nuclear Engineering and Technology

  • 제54권7호
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  • Pages.2720-2727
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  • 2022
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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Study on flow characteristics in LBE-cooled main coolant pump under positive rotating condition

  • Lu, Yonggang (School of Energy and Power Engineering, Jiangsu University) ;
  • Wang, Zhengwei (Department of Energy and Power Engineering, Tsinghua University) ;
  • Zhu, Rongsheng (National Research Center of Pumps, Jiangsu University) ;
  • Wang, Xiuli (National Research Center of Pumps, Jiangsu University) ;
  • Long, Yun (National Research Center of Pumps, Jiangsu University)
  • 투고 : 2021.09.30
  • 심사 : 2022.01.22
  • 발행 : 2022.07.25
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초록

The Generation IV Lead-cooled fast reactor (LFR) take the liquid lead or lead-bismuth eutectic alloy (LBE) as the coolant of the primary cooling circuit. Combined with the natural characteristics of lead alloy and the design features of LFR, the system is the simplest and the number of equipment is the least, which reflects the inherent safety characteristics of LFR. The nuclear main coolant pump (MCP) is the only power component and the only rotating component in the primary circuit of the reactor, so the various operating characteristics of the MCP are directly related to the safety of the nuclear reactor. In this paper, various working conditions that may occur in the normal rotation (positive rotating) of the MCP and the corresponding internal flow characteristics are analyzed and studied, including the normal pump condition, the positive-flow braking condition and the negative-flow braking condition. Since the corrosiveness of LBE is proportional to the fluid velocity, the distribution of flow velocity in the pump channel will be the focus of this study. It is found that under the normal pump condition and positive-flow braking conditions, the high velocity region of the impeller domain appears at the inlet and outlet of the blade. At the same radius, the pressure surface is lower than the back surface, and with the increase of flow rate, the flow separation phenomenon is obvious, and the turbulent kinetic energy distribution in impeller and diffuser domain shows obvious near-wall property. Under the negative-flow braking condition, there is obvious flow separation in the impeller channel.

키워드

과제정보

This study was supported by Joint Funds of the National Natural Science Foundation of China (U20A20292); National Key Research and Development Program of China (2018YFB0606105); Natural Science Foundation of Jiangsu Province (BK20210771); Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education (ARES-2021-01); National Natural Science Foundation of China (51906085); China Postdoctoral Science Foundation Funded Project (2021M701847).

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