CAJ | 학술논문

蒸汽发生器制造过程中对管板进行深孔钻时，发生管板孔桥超差。管板二次侧的3个管孔C165‐R59、C167‐R59、C168‐R58不能满足设计要求，管板一次侧的这些管孔满足设计要求。针对该不符合项，核审评单位联合蒸汽发生器制造单位和设计单位，从管板的强度、管板孔桥超差不符合项对流致振动的影响、堵管后的传热管应力分析、传热管堵管的压差对孔桥强度的影响、孔桥超差导致的传热管接触磨损等角度进行了结构安全性分析。分析结果表明，目前的堵管方案合理可行，但需加强在役阶段的跟踪检查，以保证修复的可靠性和质量。
증기발생기제조과정중대관판진행심공찬시，발생관판공교초차。관판이차측적3개관공C165‐R59、C167‐R59、C168‐R58불능만족설계요구，관판일차측적저사관공만족설계요구。침대해불부합항，핵심평단위연합증기발생기제조단위화설계단위，종관판적강도、관판공교초차불부합항대류치진동적영향、도관후적전열관응력분석、전열관도관적압차대공교강도적영향、공교초차도치적전열관접촉마손등각도진행료결구안전성분석。분석결과표명，목전적도관방안합리가행，단수가강재역계단적근종검사，이보증수복적가고성화질량。
During the manufacturing process of the steam generator ,deviated holes were detected w hen drilling the tube sheet . T he sizes of three holes including C165‐R59 , C167‐R59 and C168‐R58 on the secondary side of the tube sheet don’t meet the design requirements ,while the sizes and positions of those holes on the primary side are within design requirements . The structural safety analyses ,including tube sheet strength , influence of tube sheet with deviated holes on flow induced vibration (FIV ) , stress analysis of plugged tubes ,influence of the differential pressure between the plugged tubes and the unplugged tubes on the strength ,and fretting wear between tubes caused by deviated holes ,were done by the nuclear safety reviewer combined with the manufac‐turer and the designer .T he results show that the repair plan is reasonable and feasibili‐ty .Meanwhile ,in‐service follow‐up inspections must be strengthened to insure the quality and reliability of plugged tubes .