Atomic Energy Science and Technology ›› 2020, Vol. 54 ›› Issue (2): 302-306.DOI: 10.7538/yzk.2019.youxian.0065

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Measurement of Reactivity Value of Neutron Absorber in Venus-Ⅱ

CHEN Xiaoxian;WANG Fan;ZHOU Qi;ZHU Qingfu   

  1. Division of Reactor Engineering Technology Research, China Institute of Atomic Energy, Beijing 102413, China
  • Online:2020-02-20 Published:2020-02-20



  1. 中国原子能科学研究院 反应堆工程技术研究部,北京102413


In order to verify the calculation code and nuclear data used in the theoretical calculation of the accelerator driven sub-critical system (ADS) sub-critical reactor design, a stainless steel component was used as a neutron absorber in the lead-cooled core of the ADS Venus-Ⅱ zero-power facility, and reactivity value of stainless steel neutron absorber was measured with the periodic method. The experimental results show that the reactivity value of stainless steel neutron absorber decreases with the increase of the distance between the rod and the center. The experimental value is close to the theoretical value, and they have similar variation trend. Experimentally validated theoretical calculation code and nuclear data can be used in ADS sub-critical reactor design.

Key words: accelerator driven sub-critical system, Venus-Ⅱ, lead-cooled core, sub-critical reactor, reactivity value of neutron absorber



关键词: 加速器驱动的次临界系统, 启明星Ⅱ号, 铅冷堆芯, 次临界反应堆, 中子吸收体反应性价值