全面腐蚀控制
全麵腐蝕控製
전면부식공제
TOTAL CORROSION CONTROL
2015年
4期
62-64
,共3页
核电%管道%焊缝开裂%热应力
覈電%管道%銲縫開裂%熱應力
핵전%관도%한봉개렬%열응력
nuclear power plant%pipeline%weld crack%heat stress
某核电厂日常检查时发现辅助给水系统疏水汽水分离器排放管道焊缝处发生开裂。通过分析管道的材料，显微组织，断口等，并结合管道现场的资料信息等，得出管道的焊缝开裂为热应力造成的疲劳断裂。
某覈電廠日常檢查時髮現輔助給水繫統疏水汽水分離器排放管道銲縫處髮生開裂。通過分析管道的材料，顯微組織，斷口等，併結閤管道現場的資料信息等，得齣管道的銲縫開裂為熱應力造成的疲勞斷裂。
모핵전엄일상검사시발현보조급수계통소수기수분리기배방관도한봉처발생개렬。통과분석관도적재료，현미조직，단구등，병결합관도현장적자료신식등，득출관도적한봉개렬위열응력조성적피로단렬。
Welding seam of pipe in auxiliary feedwater system were broken on daily inspection in a domestic nuclear power plant.The investigation for the failure included chemical composition analysis,mi crostructureobservation,and so on.Based on the systematic analysis ,itcould be concluded that the reasons for pipe crack were unqualified welding technology and fatigue under alternate load.
