包覆燃料颗粒几何参数统计规律对破损率的影响  

Effects of Statistical Variations of Geometric Parameters of Coated Fuel Particles on the Failure Fraction

作　　者：李荣[1] 刘兵[1] 唐春和[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084

出　　处：《核动力工程》2016年第2期77-81,共5页Nuclear Power Engineering

基　　金：国家科技重大专项资助(ZX06901);清华大学自主科研计划资助项目

摘　　要：将包覆燃料颗粒的碳化硅包覆层看作模型中的承压壳,利用蒙特卡罗方法,将颗粒几何参数的统计分布应用到压力壳式模型,考虑颗粒包覆层几何参数的统计规律对破损率的影响。研究结果表明,包覆燃料颗粒核芯半径、疏松层厚度、内致密热解炭层厚度以及碳化硅层厚度等参数对破损率有较为明显的影响;其中,核芯半径和疏松层厚度是影响破损率相对关键的因素。The silicon carbide coating layer of the coated fuel particles was regarded as the bearing shell in the model. Considering the statistical distribution of the geometric parameters of coated layers into the pressure vessel failure model, the effects of the statistical variations of geometric parameters on the failure fraction were studied with the method of the Monte Carlo simulation. The results indicated that the failure fraction of the coated fuel particles was related to the particle geometric parameters such as kernel radius, thickness of porous layer, thickness of the inner pyrocarbon layer and thickness of silicon carbide, and kernel radius and thickness of porous layer were the main effect factors.

关 键 词：高温气冷堆 包覆燃料颗粒 破损率 

分 类 号：TL424[核科学技术—核技术及应用]