中国实验快堆某辐照实验组件燃耗分布测量

在中国实验快堆（CEFR）上建立了实验组件燃耗分布测量的实验装置。对CEFR某一辐照实验组件中的4#及6#燃料元件棒进行了相对燃耗分布的测量，并与理论计算结果进行了比较。结果表明：两根燃料元件棒虽处于实验组件的不同位置，但相对燃耗分布基本一致；燃耗分布的实验测量结果与理论计算结果符合较好；实验组件燃耗分布测量的相对误差在10.2%以内。本文工作为开展快堆乏燃料组件燃耗测量奠定了基础。

Burn-up Distribution Measurement of One Irradiation Test Subassembly in CEFR

An experimental device for measuring the burn-up distribution of test subassembly was established on the China Experimental Fast Reactor (CEFR). The relative burn-up distributions of the 4# and 6# fuel element rods in a certain test subassembly were measured and compared with the theoretical calculation results. The results show that although the two fuel element rods are in different positions of the test subassembly, the relative burn-up distributions are basically the same. The experimental measurement results of the burn-up distribution are in good agreement with the theoretical calculation results. The relative error of the burn-up distribution measurement is less than 10.2%. The work of this paper lays the foundation for the burn-up measurement of fast reactor spent fuel assemblies.