Self-powered neutron detectors are common sensory devices for flux mapping purposes in nuclear reactors. A Kalman filtering strategy has been explored in this work to overcome the inherent delay in certain designs thereof enabling their application for the online monitoring and control activities. Determination of the core excess reactivity by way of the current reading in a Rhodium detector has thus been attempted as a generalization to the well-known reactor inverse kinetics problem. Efficient reactivity estimation is reported. Further analysis carried out for a Cobalt SPND excludes the need for additional current compensation as this detector predominantly enjoys a fairly rapid $\gamma$induced electric current.

自供电中子探测器是核反应堆中用于通量映射目的的常见传感装置。在这项工作中已经探索了卡尔曼滤波策略，以克服其某些设计中的固有延迟，使其能够应用于在线监测和控制活动。因此，已经尝试通过铑探测器中的电流读数来确定堆芯过量反应性，作为对众所周知的反应堆逆动力学问题的概括。报告了有效的反应性估计。对 Cobalt SPND 进行的进一步分析排除了额外电流补偿的需要，因为该探测器主要享有相当快的$\gamma$感应电流。