飞机撞击下高温气冷堆乏燃料厂房损伤研究

本文针对典型高温气冷堆乏燃料厂房在双发商用飞机撞击载荷下的响应及结构完整性开展研究，并探讨结构特性对撞击损伤的影响。对乏燃料厂房及飞机分别建立有限元模型，通过弹体-目标相互作用分析模拟了飞机撞击过程，综合IAEA与NRC的评价准则对乏燃料厂房在飞机撞击下的损伤程度进行评估。数值结果表明：厂房上对应于机身及发动机的撞击位置发生可接受的局部损伤；乏燃料贮存井墙体对于提高构筑物抗飞机撞击能力有重要作用。此外，构筑物外形对损伤有很大影响，圆柱形壳体的抗飞机撞击能力显著强于方形厂房，是核电厂厂房设计的优化方向之一。

Study on Damage of Spent Fuel Storage Building of HTGR Subjected to Aircraft Impact

The dynamic response and structural integrity of a typical spent fuel storage building of High Temperature Gas-cooled Reactor (HTGR) subjected to the impact of a twin-engine commercial aircraft were investigated. The effect of structural characteristics on the damage during the impact was discussed. Finite element models of the spent fuel storage building and the aircraft were established respectively. The impact process was simulated by an integral missile-target interaction analysis. The damage of the spent fuel storage building was evaluated according to IAEA and NRC standards. According to the results, acceptable local damage is observed in the areas corresponding to the impact of fuselage and engines. The walls of spent fuel storage silo play an important role in improving the resistant capability of structures against aircraft impact. In addition, the shape of the structure has a strong effect on the damage during an aircraft impact. Cylindrical shells show significant advantages in the resistant capacity against aircraft impact compared with square-shaped structures, which provides one of the optimization directions for structural design of nuclear power plant.