反应堆压力壳构成了主冷却剂压力边界的主体。

The reactor vessel constitutes the main part of pressure boundary of primary coolant.

它以反应堆冷却剂(水)为工作介质，经泵加压后，注入安装在压力壳内的水力步进缸。

The reactor coolant (water) is used as actuating medium, pressed by pump, and then injected into hydraulic step cylinders which are set in the reactor vessel.

本文将反应堆压力壳的球顶盖、上下法兰、螺栓、筒体及双道O形环作为一个超静定系统进行了应力和变形分析。

The reactor pressure vessel composed of spherical top and lower heads, upper and lower flanges, bolts, cylinder and two O-rings, as a static indeterminate system has been studied.