压水堆反应堆压力容器密封主螺栓预紧过程模拟

Simulation of Bolt-up Process for Seal Main Bolts of PWR Pressure Vessel

建立了我国自主压水堆反应堆压力容器分析模型,采用通用结构分析软件ABAQUS对密封主螺栓的预紧过程进行了模拟分析。通过计算,可以得到螺栓载荷的变化、上下法兰的变形过程,从而判断螺栓加载荷顺序和大小是否合理。对于一回路压力容器的密封预紧操作具有很好的参考价值。

The reactor pressure vessel of self-owned pressure water reactor （PWR） is built, and the bolt-up process for main bolts is analyzed in this paper. According to the calculation, the change of the pre-load on the bolts and the deformation of the main flange can be checked, and a lot of useful conclusions can be got, such as whether the bolt-load of every step is good or not, whether the bolt groups are good or not. The simulation results of this paper are very meaningful for the bolt-up process operation of the first loop pressure vessel.