Method and device for titrating boric acid solution in primary loop system of nuclear power station

The invention provides a boric acid solution titration method and device in a loop system of a nuclear power plant, and the method comprises the following steps: comparing a ratio of an electrode potential difference value of a mixed solution of a boric acid solution to be titrated and a titrant to a volume difference value of the titrant within a set time with a preset threshold value, and replacing the titrant with a corresponding concentration according to a comparison result. When the concentration of the boric acid solution to be titrated changes, the concentration of the titrant can be adjusted in time, the problem that the titrant with single concentration cannot meet the titration accuracy under the condition that the concentration of the boric acid solution to be titrated changes is fully considered, and the accuracy of the boric acid solution in the whole titration process is improved. 本发明提出了一种核电站一回路系统中硼酸溶液滴定方法及装置，通过设定时间内待滴定的硼酸溶液与滴定剂的混合溶液的电极电位差值与滴定剂体积差值的比值，与预设阈值的比较，根据比较结果更换对应浓度的滴定剂，对于待滴定的硼酸溶液的浓度发生变化