The corrosion results in not only material degradation but also causes CRUD generation in the primary coolant. The axial offset anomaly (AOA) or CRUD Induce Power Shift (CIPS) is caused by CRUD accumulation on the fuel assemblies. It also causes an increase in Occupational Radiation Exposure (ORE). Therefore, in this work, activated CRUD behavior due to ⁵⁴Mn, ⁵⁹Fe, ⁵⁸Co, ⁶⁰Co, and ⁵¹Cr has been studied under primary coolant flow transient and power perturbations in a System Integrated Advanced and Modular Reactor (SMART). The “Activated CRUD particles” ACP-SMART code is used to study the primary coolant activity under parabolic corrosion rate. The SMART reactor core has been modeled in OpenMC, and respective group fluxes have been generated. The ACP-SMART, coupled with OpenMC, is modeled and implemented in MATLAB. A dynamic grid load following model and a kinetic coastdown model is implemented in ACP-SMART in terms of the ratio of the coolant kinetic energy and the kinetic energy stored in the rotating parts of a pump (β). The response of ⁵⁴Mn, ⁵⁹Fe, ⁵⁸Co, ⁶⁰Co, and ⁵¹Cr activity in primary coolant due to linear, monotonically, and asymptotically coastdown has been investigated. The ⁵⁹Fe and ⁵⁴Mn showed higher sensitivity relative to the ⁵⁸Co, in primary coolant activity corresponding to the dynamic grid load following. However, the ⁵⁹Fe and ⁵⁸Co activities are more sensitive to coastdown. Nearly all the radioisotopes showed similar behavior under monotonic flow perturbation. ⁵⁸Co and ⁵⁴Mn have shown a catastrophic behavior in the primary coolant activity under asymptotically coastdown.

腐蚀不仅会导致材料降解，还会导致在主冷却剂中产生CRUD。轴向偏移异常（AOA）或CRUD导致功率变化（CIPS）是由CRUD在燃油组件上的堆积引起的。它还会导致职业辐射暴露（ORE）的增加。因此，在这项工作中，由于⁵⁴ Mn，⁵⁹ Fe，⁵⁸ Co，⁶⁰ Co和⁵¹导致CRUD的活化行为已在系统集成式先进模块化反应堆（SMART）中研究了主要冷却剂流动瞬态和功率扰动下的Cr。“激活的CRUD颗粒” ACP-SMART代码用于研究抛物线腐蚀速率下的主要冷却剂活性。SMART反应堆堆芯已在OpenMC中建模，并且已生成各自的组通量。ACP-SMART与OpenMC一起在MATLAB中建模和实现。在ACP-SMART中，根据冷却剂动能与存储在泵旋转部分中的动能之比（β），实现了动态电网负荷跟随模型和动态滑行模型。⁵⁴ Mn，⁵⁹ Fe，⁵⁸ Co，⁶⁰ Co和⁵¹的响应已经研究了由于线性，单调和渐近滑行而引起的一次冷却剂中的Cr活性。的⁵⁹ Fe和⁵⁴锰表现出相对较高的灵敏度⁵⁸钴，在一次冷却剂的活性对应于动态网格负载以下。但是，⁵⁹ Fe和⁵⁸ Co的活动对滑行更为敏感。在单调流动扰动下，几乎所有的放射性同位素都表现出相似的行为。⁵⁸ Co和⁵⁴ Mn在渐近滑行的情况下在一次冷却液的活动中显示出灾难性的行为。