小型钠冷堆堆芯物理计算  

作　　者：秦雪猛 周涛[1,2,3] 朱亮宇 李子超 张宝玲[4] 

机构地区：[1]华北电力大学核科学与工程学院,北京102206 [2]华北电力大学核热工安全与标准化研究所,北京102206 [3]非能动核能安全技术北京市重点实验室,北京100206 [4]华北水利水电大学,河南郑州450045

出　　处：《科技创新与应用》2018年第5期15-17,共3页Technology Innovation and Application

基　　金：中核核反应堆热工水力技术重点实验室基金资助项目"超临界水自然循环流动换热特性研究"(编号:20130901);北京市自然科学基金资助项目"超临界水中细颗粒物运动沉积规律研究"(编号:3092016)

摘　　要：小型钠冷堆具有应用灵活性高,运行简单,施工周期短,一次性投资少的优点,对其进行堆芯物理计算对小型钠冷堆的安全具有重要意义。利用MCNP程序建立起燃料元件,冷却剂,堆芯构件及反射层的堆芯几何模型,并进行临界有效增殖因子、功率分布、反应性系数和停堆深度的堆芯物理计算,然后对与安全相关的物理参数进行安全性分析。研究表明:堆芯能够达到临界;堆芯功率分布较为平坦;冷却剂空泡系数为负值,满足堆芯设计准则;堆芯有足够的停堆深度,反应堆能安全停堆。Small-sized sodium cold reactor has the advantages of high application flexibility, simple operation, short construction period and low one -time investment. It is of great significance for the safety of small sodium cold reactor to calculate its core physics. The core geometry model of fuel element, coolant, core member and reflective layer is established by MCNP program. The core physical calculation of critical effective multiplication factor, power distribution, reactivity coefficient and shutdown depth is car-ried out, and then the safety analysis of the safety related physical parameters is carried out. The results show that the core can reach the critical level; the core power distribution is relatively flat; the coolant cavitation coefficient is negative, which meets the core design criteria; the core has sufficient shutdown margin, and the reactor can shut down safely.

关 键 词：小型钠冷堆 反应堆物理 安全性 

分 类 号：TL351.1[核科学技术—核技术及应用]