STEAM GENERATOR TUBE VIBRATION MEASUREMENT SYSTEM AND APPLICATION

摘要

In order to investigate flow-induced vibration problem of steam generator tubes, investigation of their support conditions in the field units is exceedingly important. MHI has developed a "Steam Generator Tube Vibration Measurement System" for this purpose, which is applicable to steam generator tubes in the field during plant-shutdown. The system has an ECT-type probe which can be inserted into the steam generator tubes by using an ECT probe pusher-puller; hence the system can access any tube. Using this system, the tube natural vibration frequency can be measured. This system has already been applied to many operating units where top tube-support-plate support conditions were investigated.