We upgrade our object kinetic Monte Carlo (OKMC) model, aimed at describing the microstructural evolution in tungsten (W) under neutron and ion irradiation. Two main improvements are proposed based on recently published atomistic data: (a) interstitial carbon impurities, and their interaction with radiation-induced defects (point defect clusters and loops), are more accurately parameterized thanks to ab initio findings; (b) W transmutation to rhenium (Re) upon neutron irradiation, impacting the diffusivity of radiation defects, is included, also relying on recent atomistic data. These essential amendments highly improve the portability of our OKMC model, providing a description for the formation of SIA-type loops under different irradiation conditions. The model is applied to simulate neutron and ion irradiation in pure W samples, in a wide range of fluxes and temperatures. We demonstrate that it performs a realistic prediction of the population of TEM-visible voids and loops, as compared to experimental evidence. The impact of the transmutation of W to Re, and of carbon trapping, is assessed.

我们升级了对象动力学蒙特卡洛（OKMC）模型，旨在描述中子和离子辐照下钨（W）的微观结构演变。根据最近发布的原子数据，提出了两个主要的改进：（a）间隙碳杂质及其与辐射诱发的缺陷（点缺陷簇和环）的相互作用，由于从头算起得到了更精确的参数化；（b）包括中子辐照引起的W向trans（Re）的，变，这会影响辐射缺陷的扩散性，并且还依赖于最近的原子数据。这些重要的修改极大地改善了我们的OKMC模型的可移植性，为在不同照射条件下形成SIA型回路提供了描述。该模型用于模拟纯W样品中的中子和离子辐照，在各种各样的通量和温度范围内。我们证明，与实验证据相比，它可以对TEM可见的空隙和毛圈进行逼真的预测。评估了W向Re的Re变以及碳捕集的影响。