HTR-10 各运行阶段控制棒反应性当量计算  

Reactivity worth calculation for control rods of HTR 10 at each phase

作　　者：许云林[1] 经荥清[1] 王德安 

机构地区：[1]清华大学核能技术设计研究院

出　　处：《清华大学学报（自然科学版）》1998年第4期22-24,共3页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目

摘　　要：介绍了１０ＭＷ高温气冷反应堆（ＨＴＲ－１０）位于反射层中的控制棒反应性当量的计算方法。用ＧＡＭ和ＴＨＥＲＭＯＳ程序分别产生堆芯、反射层、含硼碳砖及控制棒组成材料的超热群和热群截面。用二维离散纵标法程序ＳＮ２Ｄ在（ｒ，θ）坐标系下作详细控制棒结构的模型计算，该模型包括堆芯、反射层及反射层外的含硼碳砖，控制棒位于反射层中。含硼碳砖的外表面为自由边界，以考虑反射层中的中子泄漏谱。按通量权重归并控制棒区（包括控制棒、空隙及石墨反射层的整个圆环）的均匀化截面。全堆有控制棒和无控制棒情况下的Ｋｅｆｆ本征值，是由有限差分程序ＣＩＴＡＴＩＯＮ在（ｒ，ｚ）坐标系下计算出的，并由此得到控制棒的反应性当量。文中给出了ＨＴＲ－１０各运行阶段（包括初装堆、过渡过程中期和后期、平衡换料等时期）的控制棒的反应性当量。初装堆控制棒的反应性积分与微分当量也在文中给出。A method used in reactivity worth calculation for control rods of 10MW high temperature gas cooled reactor (HTR 10) is described, in which the control rods are located at the reflector and directly near the core. GAM and THERMOS codes are used in the usual way to produce cross sections of core, reflector, materials used in control rods, etc. The two dimensional discrete ordinates transport theory code SN is used to calculate a model with clear structure of control rod in ( r,θ ) system, space and spectrum effects are dealt with at same time in this model. The cross sections in the region that includes control rods and part reflector are homogenized by the weight of fluxes. The K eff for the situations with control rods fully inserted and fully withdrawn is calculated by using diffusion theory code CITATION in ( r,z ) system. The reactivity worth of control rods at each phase of HTR 10, including initial, running in and balance phases, has been calculated by using this method. The integral and differential worth of control rods is also studied.

关 键 词：高温气冷反应堆 控制棒 反应性当量 

分 类 号：TL361[核科学技术—核技术及应用]