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国产压水堆燃料棒酸洗后出现了岛形麻点。这种麻点中间凸起,四周凹陷,呈圆形,直径1 mm左右,影响元件质量。为确保秦山核电厂的安全运行,必须弄清麻点的性质和形成原因。为此,对典型的岛形麻点样品作了形貌观察,表面轮廓测量,腐蚀试验,金相、电子探针和表面氟含量分析,并通过模拟试验,确定了麻点的性质和形成原因
Domestic pressurized water reactor fuel pickling appeared island-shaped pitting. This pitting convex in the middle, around the depression, was round, about 1 mm in diameter, affecting the quality of components. In order to ensure the safe operation of Qinshan NPP, it is necessary to understand the nature of the pits and the reasons for their formation. For this reason, the morphological observation, surface profile measurement, corrosion test, metallography, electron probe and surface fluorine content analysis of the typical island-shaped pitting samples were conducted. Through the simulation test, the nature and formation of the pitting