CAJ | 학술논문

在某些因素的影响下，少量压水堆核电站控制棒驱动机构（CRDM ）下部Canopy焊缝区域会发生破损泄漏。通过在焊缝外部安装封堵组件，能有效预防、封堵和遏制破损焊缝的进一步泄漏。本文针对该组件的结构特点，分析关键零件的受力情况，利用有限元软件验证该组件的封堵效果。结果表明，该组件能有效降低焊缝区域的应力水平。同时，通过对比分析预紧力、配合面角度和摩擦系数等因素对焊缝应力水平的影响趋势，得出了各因素的影响关系曲线和最佳参数。所分析数据可应用于结构设计、加工制造和装配工艺，使该组件达到最佳的封堵效果。
재모사인소적영향하，소량압수퇴핵전참공제봉구동궤구（CRDM ）하부Canopy한봉구역회발생파손설루。통과재한봉외부안장봉도조건，능유효예방、봉도화알제파손한봉적진일보설루。본문침대해조건적결구특점，분석관건령건적수력정황，이용유한원연건험증해조건적봉도효과。결과표명，해조건능유효강저한봉구역적응력수평。동시，통과대비분석예긴력、배합면각도화마찰계수등인소대한봉응력수평적영향추세，득출료각인소적영향관계곡선화최가삼수。소분석수거가응용우결구설계、가공제조화장배공예，사해조건체도최가적봉도효과。
Control rod drive mechanism (CRDM ) lower Canopy welding zone could leak under the influence of certain factors in some pressurized water reactors .The plugging assembly mounted on the welding externally can prevent and seal the leakage .Accord‐ing to the structure characteristics of the components , the stress conditions of key components were analyzed and the plugging effect of the assembly was verified by using the finite element software .The results show that the component can effectively reduce the stress of welding zone .At the same time ,the stress level trends due to different pre‐tightening forces , contact surface angle and friction were analyzed , so that the relationship curves and the optimum parameters were educed .The analysis data can be applied to the structure design , manufacture and assembly process , for making the component to achieve the best effect of plugging .