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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。
The calorific value of the heat release rate of stainless steel in the reactor was measured by calorimetry based on the static isothermal method under thermal equilibrium conditions. The relationship between the heat release rate of stainless steel along the axial height of the active zone along the reactor and the heap power . Meanwhile, the MCNP program was used to calculate the corresponding heat release rate of stainless steel, and the MCNP program was used to calculate the accuracy of the heat release rate of stainless steel experimentally. The results show that the heat release rate of stainless steel in the reactor is closely related to the location of the active zone and the stack power. The heat release rate of stainless steel is approximately truncated cosine curve along the axial direction of the active zone. The maximum heat release rate is located at the center of the reactor active zone About 50 mm in the lower part of the pile, and it has a linear increasing relationship with the pile’s power. In the study range, the heat release rate of stainless steel calculated by MCNP program is 18.1% larger than the actual measured value. From the perspective of engineering application, the calculated heat release rate of stainless steel by MCNP program is of guiding significance for practical engineering applications.