Feasibility study of burn-up analysis and monitoring using delayed fast neutrons was investigated at Missouri University of Science and Technology Reactor (MSTR). Burnt and fresh fuel elements were used to collect delayed fast neutron data for different power levels. Total reactivity varied depending on the burn-up rate of fuel elements for each core configuration. The regulating rod worth was 2.07E-04 Δk/k/in and 1.95E-04 Δk/k/in for T121 and T122 core configurations at 11 inch, respectively. Delayed fast neutron spectrum of F1 (burnt) and F16 (fresh) fuel elements were analyzed further, and a strong correlation was observed between delayed fast neutron emission and burn-up. According to the analyzed peaks in burnt and fresh fuels, reactor power dependency was observed and it was determined that delayed neutron provided more reliable results at reactor powers of 50 kW and above.

密苏里科技大学反应堆 (MSTR) 研究了使用延迟快中子进行燃耗分析和监测的可行性研究。燃烧的和新鲜的燃料元件用于收集不同功率水平的延迟快中子数据。总反应性取决于每种堆芯配置的燃料元件的燃烧率。对于 11 英寸的 T121 和 T122 磁芯配置，调节杆的价值分别为 2.07E-04 Δk/k/in 和 1.95E-04 Δk/k/in。进一步分析了 F1（燃烧）和 F16（新鲜）燃料元件的延迟快中子谱，观察到延迟快中子发射与燃尽之间存在很强的相关性。根据已燃燃料和新鲜燃料的分析峰值，