一体化小型氟盐冷却高温堆瞬态特性分析

发布时间：2018-06-17 04:11

本文选题：一体化小型氟盐冷却高温堆 + RELAP-MS　；参考：《核技术》2017年06期

【摘要】：根据下一代核能系统的发展目标,提出了采用自然循环的一体化小型氟盐冷却高温堆的概念。利用修改后的RELAR5-MS系统分析程序,建立了一体化小型氟盐冷却高温堆模型,并得到其稳态特性参数。在此基础上,对其在满功率运行状态下的反应性引入事故和失热阱事故进行了分析。分析计算表明,在反应性事故工况下,由于自然循环的存在,堆芯冷却剂流量随着堆芯温度发生动态变化,最终达到新的稳态,燃料棒和冷却剂温度均处于安全限值范围内。在失热阱事故下,反应堆负反馈的特性使得堆芯功率逐渐降低并实现自动停堆,即使不考虑余热排出系统的作用,燃料组件和冷却剂温度上升缓慢,在140 h内,燃料棒和冷却剂温度均处于全限值范围内。结果表明,一回路采用自然循环冷却的一体化小型氟盐冷却高温堆具有良好的固有安全性。
[Abstract]:According to the development goal of the next generation nuclear energy system, the concept of integrated small fluorine salt cooled high temperature reactor with natural circulation is proposed. Using the modified RELAR5-MS system analysis program, an integrated model of a small fluorine salt cooled high temperature reactor is established, and its steady-state characteristic parameters are obtained. On this basis, the reactive inductive accident and the heat loss trap accident under the full power operation state are analyzed. Analysis and calculation show that under the condition of reactive accident, due to the existence of natural circulation, the core coolant flow rate changes dynamically with the core temperature, and finally reaches a new steady state, and the fuel rod and coolant temperature are within the safe limit. Under the condition of heat loss well accident, the negative feedback characteristics of the reactor make the core power gradually decrease and realize the automatic shutdown. Even if the residual heat removal system is not considered, the temperature of fuel assembly and coolant rises slowly, and within 140 hours, the temperature of fuel assembly and coolant increases slowly, and the temperature of fuel assembly and coolant increases slowly within 140 hours. Fuel rod and coolant temperature are within the full limit range. The results show that the integrated small fluorine salt cooled high temperature reactor with natural cycle cooling in primary circuit has good inherent safety.
【作者单位】：中国科学院上海应用物理研究所;中国科学院大学;上海科技大学;
【基金】：中国科学院战略性先导科技专项(No.XDA02050)资助~~
【分类号】：TL364

【相似文献】