CN HCCB TBS热交换器管道破裂事故分析  

Simulation of Heat Exchanger Tube Rupture Accident for CN HCCB TBS

作　　者：胡泊 王艳灵 武兴华 曹启祥 赵奉超 Hu Bo;Wang Yanling;Wu Xinghua;Cao Qixiang;Zhao Fengchao(Southwestern Institute of Physics,Chengdu 610000,China)

机构地区：[1]核工业西南物理研究院,成都610000

出　　处：《核安全》2025年第2期36-44,共9页Nuclear Safety

基　　金：ITERHCCBTBS集成技术与TBM-set设计研发采购包(CNDA_2020_R&D_005);HCCBTBS氦冷系统研发设计采购包(CNDA_2022_R&D_002)的资助。

摘　　要：按照法国当地法律要求,为验证中国氦冷固态增殖剂实验包层系统(China Helium Cooled Ceramic Breeder Testing Blanket System,简称CN HCCB TBS)在事故工况下的安全性,需开展事故工况分析工作。本文基于氦冷包层系统初步设计方案,采用RELAP5/MOD3.4程序对热交换器管道破裂事故工况进行建模计算,结果表明:(1)事故瞬态下第一壁材料温度大幅度上升,但持续时间很短,符合验收准则;(2)事故工况下二次侧管路内部压力上升幅度大,最大可达10 MPa;(3)小破口事故工况中,二次侧冷却水会倒流进一回路,形成氚化水。为降低小破口事故下二次侧管道压力,本文开展了改进控制逻辑后的模拟计算,结果表明压力上升情况变得更为舒缓。最后,本文建议在后续的研究中采用耦合计算方法以获得准确的压力、流量等分布,以验证热交换器在事故工况下的完整性。In accordance with the local legislation,the accident analysis should be conducted for the purpose of verifying the safety of the China Helium Cooled Ceramic Breeder Testing Blanket System(CN HCCB TBS)under accident scenarios.In this article,based on the preliminary design of the TBS,the Heat Exchanger Tube Rupture Accident is simulated with the utilization of RELAP5/MOD3.4.The results show that:1.The temperature of the first wall material increases significantly with a short duration,meeting the acceptance criteria.2.The pressure in the pipe on the heat exchanger 2nd side has a considerable increment,reaching 10 MPa.3.In the small break accident,the secondary cooling water flows into the primary loop of HCS reversely,resulting in the tritiated water.In order to reduce the pressure in pipes on 2nd side during the small break scenario,another simulation with the modified control logic is conducted and the results show that the increment of pressure becomes mild.Consequently,the coupling method is suggested in the further study to obtain the precise distributions on pressure and velocity,for the purpose of verifying the integrity of the heat exchanger during accident scenarios.

关 键 词：ITER 中国氦冷实验包层 事故分析 RELAP5 

分 类 号：TL69[核科学技术—核技术及应用]