针对核电站安全注入系统(RIS)低压安注泵(LHSI)小流量管线减振改造方案,开展可实施性评估。采用计算流体动力学(CFD)数值计算与试验模型回路验证相结合的方法,对减振效果进行评估。振动限值计算参照ASME 0M3执行,管线应力校核、支吊架强度和刚度校核采用管道专用软件syspipe完成。所有计算结果均表明,提出的改造方案有效、可行,可开展改造方案的具体实施。 A feasibility assessment was carried out for the retrofit program of low flow injection line (LHSI) low flow pipelines for nuclear power plant safety injection system (RIS). The method of combining computational fluid dynamics (CFD) numerical calculation with test model loop verification was used to evaluate the vibration reduction effect. Vibration limit calculation reference to the implementation of ASME 0M3, pipeline stress check, support hanger strength and stiffness check using pipe-specific software syspipe completed. All the calculations show that the proposed transformation scheme is effective and feasible and the implementation of the transformation scheme can be carried out.