CEFR组件替换反应性价值试验测量与计算分析

Measurement and Analysis of CEFR Assembly Exchanging Reactivity Worth

组件替换反应性价值定义为测量位置组件替换成相应组件时引入的反应性变化。中国实验快堆物理启动试验中组件替换反应性价值测量试验方案中,试验测量了8个典型位置,其中6个位置为燃料组件替换成不锈钢组件,另外两个为不锈钢组件替换成燃料组件。测量结果显示,燃料组件替换反应性价值由内至外依次减少,内圈燃料组件替换反应性价值约-980pcm,外圈燃料组件替换反应性价值约-470pcm,补偿棒棒组测量和单根补偿棒测量的结果差别微小。使用CITATION程序对试验方案进行了理论计算,结果表明,计算结果与实验值符合良好,检验了CITATION程序的工程设计实用性。

The assembly exchanging reactivity worth is defined as the reactivity change when the assembly of a core position is replaced by a relative one.The measurement test program and process of the CEFR assembly exchanging reactivity were described.There were 8 typical positions totally in this test.Separately,fuel assemblies of six positions were replaced by stainless steel assemblies,and other stainless steel assemblies of two positions were replaced by fuel assemblies separately.The measurement results show that the worth of the assembly exchanging reactivity of fuel positions reduced from-980 pcm（inside of core） to-470 pcm（outside of core）.The theoretical calculation of the testing program was carried out using the CITATION code.The calculation results were in good agreement with the experimental values,and the comparison inspected the engineering practicality of the CITATION code.