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试图对池式快堆结构作较大简化，使计算简图既能反应堆结构的动力特性，又能使计算简便可行。从而把一个复杂的结构用一个简单的弹簧-质量体系来近似地等效代替。引入容器的变形假设和确定的液动压力假设，应用虚位移原理可获得体系在水平地震作用下的运动方程，而后考察其地震动响应。
Attempting to simplify the structure of the pool fast reactor makes the calculation of the diagram not only the dynamic characteristics of the reactor structure, but also make the calculation simple and feasible. Thus replacing a complex structure with a simple spring-mass system approximately equivalently. Introducing the deformation assumption of the container and the hypothesis of the hydrodynamic pressure, the equation of motion under the action of horizontal earthquake can be obtained by applying the principle of virtual displacement, and then the ground motion response can be investigated.