In this work, Esfahan light water subcritical reactor (ELWSCR) is analysed using experimental and theoretical diagnostic methods. Important neutronic parameters of the system such as prompt neutron lifetime, delayed neutron fraction, prompt neutron decay constant, negative reactivity of the core, fuel and moderator temperature coefficient of reactivity, and overall and local void coefficient of reactivity are estimated. Also, neutron flux distribution, reflector saving, water level effect, and lattice pitch of the core including operating point of the facility are studied in details. Theoretical results are calculated by MCNPX and measurements are performed utilizing zero power reactor noise method. Detailed descriptions of the results are explained in the text.

在这项工作中，使用实验和理论诊断方法对伊斯法罕轻水次临界反应堆 (ELWSCR) 进行了分析。估计了系统的重要中子参数，例如瞬发中子寿命、延迟中子分数、瞬发中子衰变常数、堆芯负反应性、燃料和慢化剂反应温度系数以及反应性的整体和局部空隙系数。此外，还详细研究了中子通量分布、反射器节省、水位效应和堆芯的晶格间距，包括设施的工作点。理论结果由 MCNPX 计算，测量采用零功率反应堆噪声方法。结果的详细描述在文本中进行了解释。