Atomic Energy Science and Technology ›› 2021, Vol. 55 ›› Issue (4): 577-583.DOI: 10.7538/yzk.2020.youxian.0737

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First Physics Start-up of Lead Core of Venus-Ⅱ Zero Power Reactor

ZHU Qingfu;ZHOU Qi;XIA Zhaodong;LIU Yang;ZHANG Wei;LUO Huangda;CHEN Xiaoliang;WANG Fan;CHEN Xiaoxian;LIU Feng;LIU Donghai   

  1. Division of Reactor Engineering Technology Research, China Institute of Atomic Energy, Beijing 102413, China
  • Online:2021-04-20 Published:2021-04-20



  1. 中国原子能科学研究院 反应堆工程技术研究部,北京102413


First physics start-up of the lead core of Venus-Ⅱ aims to load the nuclear fuel elements into the lead core which is the first zero power reactor for lead-cooled fast reactor in China, and confirm the safety characteristics of the core. The lead core uses two kinds of nuclear fuel elements. The number of fuel elements in critical is large. The reactivity worth of fuel elements in different locations is widely dissimilar. In considering these features, the initial neutron source and neutron monitoring detectors were carefully selected and validated in first physics start-up, the influence in neutron scattering and absorbing by simulacrum elements was evaluated and a specific loading pattern with sub-zone extrapolation was formulated. According to the loading pattern, the lead core completed fuel loading and reached critical safely. The reactivity of simulacrum elements, fuel elements, safety rod and adjust rod was measured. This work provides important experimental parameters and critical loading pattern for subsequent experiments.

Key words: Venus-Ⅱ, lead core, physics start-up, loading extrapolation, reactivity measurement



关键词: 启明星Ⅱ号, 铅堆堆芯, 物理启动, 装料外推, 反应性测量