压水堆装卸料机堆芯定位试验方法的比较分析

Analysis of Reactor Core Positioning Method for PWR Manipulator Crane

装卸料机作为压水堆核电厂燃料装卸与贮存系统(PMC系统)的关键设备之一,其堆芯定位试验是进行堆芯首次装料的前提,也是机组换料的保障。单点定位法是目前国内压水堆机组装卸料机堆芯定位试验普遍使用的方法。某核电厂装卸料机用单点定位法进行堆芯定位试验时,部分位置出现模拟燃料组件与堆内构件围板磕碰问题。提出四点定心平均步长堆芯定位方法,成功地解决了磕碰问题,并比较分析单点定位法和四点定心平均步长法之间的优缺点。

Manipulator crane is one of the key equipments which belong to the fuel handling and storage system （PMC system） in PWRs. In-core positioning is a prerequisite for the first fuel loading, and the security of reactor refueling. Single point positioning method is the prevailing method of reactor core positioning in the domestic PWRs. During the core positioning test with the single point positioning method, the problem that the dummy would bump against the lower internals appeared in a nuclear power plant. Through the innovative core positioning method--four points centre and average step length method, this problem was solved successfully. This paper analyzes the advantages and disadvantages of the single point positioning method and the four points centre and average step length method.