基于TMSR-LF1的Ⅱ类研究堆抗震设计方法研究

抗震设计是核设施为满足安全与经济综合要求进行设计时的重要内容，目前研究堆的抗震设计缺乏相应的规范与研究，尚未发现较为完善的方法体系。本文推荐了一个匹配结构与设备的Ⅱ类研究堆抗震设计方法，以50 a超越概率2%地震动作为安全停堆地震（SSE），并以2 MW液态燃料钍基熔盐实验堆（TMSR-LF1）为例，对比分析了采用该方法与采用其他相关规范方法得到的设计反应谱（DRS），并将其应用于结构和设备的抗震设计计算中。结果表明：推荐方法在满足结构与设备的抗震设计匹配性的前提下，相比核电规范具有较好的经济性，相比民用规范具有较好的保守性，更加合理。

Study on Seismic Design Method of Class II Research Reactor Based on TMSR-LF1

Seismic design is an important part of nuclear facilities design to meet the comprehensive requirements of safety and economy. At present, the seismic design of research reactors lacks corresponding specifications and studies, and a relatively complete method system has not yet been found. In this paper, a seismic design method for class II research reactor matching structure and equipment is recommended. Taking the earthquake motion with a 50 a exceedance probability of 2% as the safe shutdown earthquake (SSE), and taking the 2 MW liquid fuel thorium based molten salt experimental reactor (TMSR-LF1) as an example, the design response spectra obtained by using this method and various specification methods are compared and analyzed, and they are applied to the seismic design and calculation of structures and equipment. The results show that the recommended method has better economy than the nuclear power code and better conservatism than the civil code on the premise of meeting the seismic design matching of structures and equipment.