引言核动力堆正常运行期间,冷却一次回路中结构材料的腐蚀作用会产生腐蚀产物,它们受中子活化而变成放射性的。这些放射性腐蚀产物沉积在整个一次冷却回路内。在一次冷却回路中使用处理过的循环水和特殊级别的建筑用的金属会使这种影响减少到最小。即使如此,数年之后,在反应堆的需要进行常规检查、保养和检修区域的设备内,这种沉积的腐蚀产物的辐射水平可能显著增加。当这种情况发生时,理想的办法是对反 INTRODUCTION During normal operation of a nuclear power reactor, corrosion of the structural materials in the primary circuit of cooling leads to corrosion products that become radioactive when activated by neutrons. These radioactive corrosion products are deposited throughout the primary cooling circuit. The use of treated circulating water and a special class of construction metals in a cooling circuit minimizes this effect. Even so, several years later, the level of radiation of such deposited corrosion products may increase significantly in the reactor’s equipment where routine inspection, maintenance and overhaul is required. When this happens, the ideal solution is counter-productive