启明星1#次临界装置内不同位置探测器的中子计数率变化

Neutron Count Rate Change for Detectors at Different Positions in Venus 1# Sub-critical Assembly

摘要: 在启明星1#次临界装置上进行了次临界外推实验，外中子源分别采用Am-Be中子源和²⁵²Cf中子源，放置在启明星1#次临界装置中心，中子探测器放置在次临界装置内不同位置，研究相对中子计数率的变化。实验测量结果表明：在启明星1#次临界装置不同位置的探测器测量得到的中子计数率变化不同，但对外推结果影响不大。

Abstract: Relative neutron count rate change was studied on Venus 1# sub-critical assembly for the detectors at different positions of the core with external neutron source, Am-Be neutron source and ²⁵²Cf neutron source respectively. The experimental results show that neutron count rate changes for the detectors at different positions are different on Venus 1# sub-critical assembly, but it’s little effect on the results of sub-critical extrapolate experiment.