This research presents BISON simulations of stress, temperature, and failure probability of tristructural isotropic (TRISO) fuel particles subjected to transient power pulse conditions in the Nuclear Safety Research Reactor (NSRR). By modifying the default elastic properties of the PyC and the UO₂ coefficient of thermal expansion correlation, BISON was found to produce suitable agreement with the observed and independently simulated results when appropriate shape and scale Weibull parameters for SiC failure were chosen. The Weibull parameter effects were also explored within the range of SiC failure and were applied using experimental data from hemispherical crush testing.

这项研究提出了在核安全研究反应堆（NSRR）中经受瞬态功率脉冲条件的三结构各向同性（TRISO）燃料颗粒的应力，温度和失效概率的BISON模拟。通过修改PyC的默认弹性特性和UO ₂热膨胀系数，可以发现BISON与SiC失效选择合适的形状和尺度Weibull参数时，可以与观察到的结果和独立模拟的结果产生合适的一致性。在SiC失效范围内，还研究了Weibull参数效应，并使用了来自半球形挤压试验的实验数据进行了应用。