核电厂负反应性校刻方法研究

在压水堆核电厂物理试验中，反应性仪每次使用前均需用周期法进行校刻。然而由于周期法未考虑瞬态项的影响，在实施较大负反应性的校刻试验时，试验结果偏差较大。采用数值计算方法对点堆中子动力学方程进行了精确求解，对得到的中子密度与周期法结果进行了对比和分析，从而设计了修正系数K方法。该方法考虑并可简化处理瞬态项的影响，使得周期法对负反应性校刻同样适用。

Study on Negative Reactivity Calibration Method for Nuclear Power Plant

The reactivity meter has to be calibrated every time before measuring reactivi-ty by using period method during PWR physical test.Meanwhile,the period method is not accurate enough when the large negative reactivity is introduced due to the effect of the transient items.The numerical calculation analysis was applied to solve point-reactor neutron kinetics equations for more accurate results.Therefore,the coefficient K meth-od was discovered by comparing the test result of neutron density with the calculation result of period method.The coefficient K method can simplify the way dealing with the transient items and make period method still available to the calibration of negative reactivity.