辐照条件对U10Mo-Al弥散型燃料肿胀性能的影响

Effects of Different Irradiation Conditions on Swelling Performance of U10Mo-Al Dispersion Fuel

摘要:

通过建立微球燃料元件模型，对U10Mo-Al弥散型燃料在不同辐照条件下的辐照肿胀性能进行模拟计算，结果表明：辐照温度越高，燃料肿胀越明显；随着裂变率的增加，在燃耗拐点以前，燃料的肿胀速率基本相同，在燃耗拐点以后，裂变率大的燃料肿胀较慢；与实验数据点进行比较，在合理的范围内理论值和实验值相一致。

Abstract:

A mini-spherical model of fuel was designed and the irradiation swelling of U10Mo-Al dispersion fuel was simulated by the model. The results show that a higher irradiation temperature leads to a more obvious swelling of fuel. With the fission rate increasing, below the turning point of burnup the rate of swelling is nearly the same; however, beyond the turning point of burnup, the rate of swelling is slower at higher fission rate. The predicted results are well consistent with the experimental in a reasonable range.