Abstract The purpose of this study is to investigate the effect of zinc addition to the simulated primary coolant of a PWR on fuel crud deposition behavior. Crud deposition tests were performed in recirculating hydrogenated water containing 2 ppm Li and 1000 ppm B at three different zinc concentrations (0, 20, and 100 ppb) at 325 °C and 120 bar. Crud deposited on the claddings was characterized as cubic nickel ferrites and the zinc contents incorporated in the crud were increased with the increase of the added zinc concentrations. The deposited crud mass at 100 ppb zinc was increased by about 55%, compared to that at 0 ppb zinc. The zeta potential differences between the magnetite nanoparticles and the cladding surfaces were significantly decreased at the 100 ppb zinc condition, resulting in an increase of crud.

中文翻译：

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添加锌对模拟压水堆主冷却剂条件下燃料凝块沉积的影响

摘要 本研究的目的是研究在压水堆模拟主冷却剂中添加锌对燃料凝块沉积行为的影响。在 325 °C 和 120 bar 条件下，在含有 2 ppm Li 和 1000 ppm B、三种不同锌浓度（0、20 和 100 ppb）的再循环氢化水中进行原油沉积测试。沉积在覆层上的粗粒被表征为立方镍铁氧体，并且结合在粗粒中的锌含量随着添加的锌浓度的增加而增加。与 0 ppb 锌相比，100 ppb 锌沉积的碎屑质量增加了约 55%。在 100 ppb 锌条件下，磁铁矿纳米颗粒和包覆表面之间的 zeta 电位差显着降低，导致 crud 增加。