高温气冷堆反应堆厂房外墙及蒸发器舱室抗飞机撞击数值分析

反应堆抗大飞机撞击是需要考虑的外部事件，对反应堆的安全评价非常重要。本文在耦合冲击动力学有限元模型的基础上，提出了双层平行墙体承受飞机撞击的等效模拟方法，研究了高温气冷堆（HTGR）较薄的方形蒸发器舱室抗商用飞机撞击能力。建立了反应堆厂房外墙受商用飞机撞击穿透评价标准，并进行了商用飞机撞击反应堆厂房外墙仿真计算，得到了飞机剩余动能曲线。飞机撞击蒸发器舱室的计算中，保守假设飞机穿过外墙后无质量损失，形态完好，以剩余速度撞击方形蒸发器舱室。评估表明，蒸发器舱室结构在撞击条件下的整体损伤微小，可为保护内部关键设备提供重要的屏障功能。 

Numerical Analysis of Aircraft Impact on Wall of High Temperature Gas-Cooled Reactor Building and Evaporator Cavity

It is necessary to consider the external event of large aircraft impact on the reactor, which is very important for the safety evaluation of the reactor. In this paper, based on the finite element model of coupled impact dynamics, an equivalent simulation method of double-layer parallel wall subjected to aircraft impact is proposed, and the impact resistance of the thin square evaporator chamber of a high-temperature gas-cooled reactor (HTGR) against commercial aircraft is studied. The external wall of the reactor building is evaluated by the impact of commercial aircraft impact penetration, and the external wall simulation of the commercial aircraft impact reactor building is carried out. Then the residual kinetic energy curve of the aircraft is obtained. The calculation of the aircraft striking the evaporator compartment assumes that the aircraft has no mass loss after passing through the outer wall and is in good shape, striking the square evaporator chamber at the remaining speed. The evaluation shows that the overall damage of the evaporator compartment structure under impact conditions is small and can provide an important barrier function for protecting the critical internal equipment. Assessment results show that the overall damage of evaporator reactor cavity structure under impact condition is small, so the cavity can provide an important barrier function for the important equipment inside it.