【摘要】 介绍了用于核临界安全问题研究的铀溶液实验装置,给出了在活性区全水反射层情况下首次物理启动时的核燃料装料步骤。用外推法、内插法、功率稳定法实验测定的硝酸铀酰溶液的临界体积为20479.62mL,从而给出235U的临界质量为1579.184g。最后给出控制棒价值的实验刻度等。更多还原

【Abstract】 The uranyl nitrate solution experiment facility for the research on nuclear criticality safety is described. The nuclear fuel loading steps in the first start-up for water-reflected core are presented. During the experiments, the critical volume of uranyl nitrate solution was determined as 20 479.62 mL with count rate inverse extrapolation method, reactivity interpolation method, and steady power method. By calculation, critical mass of 235U was derived as 1 579.184 g from experimental data. The worth of control rods was also calibrated in the first start-up of the facility.更多还原