新型先进压水堆反射层旁流设计改进

Improvement of Reflector Bypass Design for New Advanced Pressurized Water Reactor

摘要: 反应堆水力学设计的主要内容包括确定反应堆压力容器和堆芯的压降与旁流。传统CPR1000核电站采用的围板–辐板–吊篮筒体结构，容易出现销钉掉落等问题，影响了核电站的正常运行。因此，先进压水堆设计中考虑采用金属反射层结构代替上述结构。本文采用自主开发的旁流计算程序ELM，对反应堆压力容器压降和旁流进行了详细计算，并与实验结果进行了对比分析，计算结果证明了金属反射层的结构改进是合理可靠的。

Abstract: The main contents of reactor hydraulic design include determining the Reactor Pressure Vessel, pressure drop and side flow of the core. The traditional CPR1000 nuclear power plant adopts the structure of baffle-former-barrel, which is prone to the problem of pin falling, which affects the normal operation of the nuclear power plant. Therefore, the metal reflector structure is considered to replace the above structure in the design of advanced pressurized water reactor. The Reactor Pressure Vessel pressure drop and bypass flow are calculated in detail by using the self- developed bypass flow calculation program ELM, and compared with the experimental results. The calculation results prove that the structural improvement of metal reflector is reasonable and reliable.