作　　者： (斯俊平）; (童明炎）; (杨文华）; (张亮）; (聂良兵）; (张平）;

机构地区： 中国核动力研究设计院,成都610213

出　　处： 《核动力工程》 2017年第4期128-133,共6页

摘　　要： 采用量热法,基于热平衡条件下的静态等温法测量了不锈钢在堆内的释热率,并探索不锈钢释热率随沿堆内活性区轴向高度的分布情况以及与堆功率之间的关系。同时,利用MCNP程序计算了相应的不锈钢的释热率,通过实验手段探索MCNP程序计算不锈钢释热率的准确性。研究表明:不锈钢在堆内的释热率与所处活性区位置以及堆功率密切相关;不锈钢的释热率沿活性区轴向近似呈截断余弦曲线分布;最大释热率位于反应堆活性区中心平面偏下约50 mm处,且与堆功率呈线性递增关系。在研究范围内,利用MCNP程序计算得到的不锈钢释热率较实际测量值平均偏大18.1%。从工程应用角度讲,MCNP程序所计算的不锈钢释热率对实际工程应用具有一定指导意义。 A special calorimeter based on the static isothermal method under thermal equilibrium conditions was designed to measure the heat generation rate of the stainless steel. Besides, the distribution of the heat generation rate of the steel along with the reactor active axial region, as well as its relationship with the reactor power are further explored. Meanwhile, the MCNP code was also used to calculate the heat generation rate of the steel, and the accuracy of the MCNP code was verified by comparing the corresponding measurement and calculation values. The results show that the heat generation rate of the steel in the research reactor is closely related to the location and the reactor power, and it approximately changes along with the reactor active axial region in a truncated cosine curve. The maximum heat generation rate is located in about 50 mm below the center plane of the reactor, and it linearly increases with the increasing of the reactor power. At the range of the experiment, the values calculated by the MCNP code are averagely 18.1% higher than those acquired in the experiment, and it shows that the heat generation rate of the steel by the MCNP code has a guiding significance for the practical application in the research reactor.

关 键 词： 反应堆 不锈钢 释热率测量 程序