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国内池式轻水研究反应堆中,尽管其燃料元件包壳材料、反应堆水池覆面材料和主要堆内构件材料以及运行温度不一样,其冷却剂pH值都定为偏酸性。本文根据池式轻水研究堆环境条件等实际情况,从水的pH值和水温对铝质材料浸水表面腐蚀速率的影响角度分析认为,即使燃料元件包壳为铝质材料,只要铝质材料浸水表面温度不超过使其表面非晶态氧化膜(屏蔽层)减薄的临界温度,反应堆池水的pH值可以取中性范围。
In domestic pools of light water research reactors, the coolant pH is set to be slightly acidic despite variations in the fuel element cladding, reactor pool coverings, and main internals, as well as operating temperatures. According to the actual conditions of the pond-type light water research reactor environmental conditions, the influence of water pH value and water temperature on the corrosion rate of aluminum material surface is considered that, even if the fuel element cladding aluminum material, as long as the aluminum material is soaked The surface temperature does not exceed the critical temperature at which the amorphous oxide film (shield) on the surface is reduced. The pH of the reactor water can be in the neutral range.