中国先进研究堆冷中子源核发热和冷中子增益研究

Study on Nuclear Heating and Gain Factor for Cold Neutron Source in China Advanced Research Reactor

为准确计算和研究中国先进研究堆(CARR)冷中子源装置氢系统的核发热和冷中子增益,建立了一整套计算方法。对参考堆的验证计算证明了该方法的正确性和有效性。对影响CARR冷中子源核发热和冷中子增益的各种因素(如慢化剂、冷包材料、冷包形状等)进行了计算和优化选择。结果表明:在核发热量较小的条件下获得了较好的冷中子增益。

A series of calculation methods were established in order to calculate the nuclear heating and gain factor accurately, which are two important parameters of hydrogen circulation for the cold neutron source（CNS） in China Advanced Research Reactor （CARR）. The verification with reference reactor demonstrates that these methods are correct and effective. Many factors, such as moderator, material of moderator cell, the shape of cell and so on, which would affect the nuclear heating and gain factor, were calculated and optimized for the CNS in CARR. The results show that better gain factor can be gotten with relatively low nuclear heating.