역지 밸브 채터링 해소방안 연구

A stydy on the chattering noise elimination of the check valve

  • 유기완 (한국 전력연구원 원자력연구실) ;
  • 이준신 (한국 전력연구원 원자력연구실) ;
  • 김태룡 (한국 전력연구원 원자력연구실) ;
  • 김경구 (한전 고리1발전소 기계부)
  • 발행 : 2000.06.22

초록

Cause and the elimination method for the chattering phenomena were investigated the check valve attached exit of the auxiliary cooling water pump at a korean nuclear powerplant. From the site experiment and numerical calculation the incident angle of the disk was so small that it was not able to produce the lifting force to overcome the component of disk weight. Moreover, it turned out that the installed position was not symmetric for the secondary vortical flow generated inside the elbow, so that the flow structure had strongly unstable flow characteristics. From this technical support, the tapping noise and the chattering phenomena were eliminated exactly by changing the incidence angle of the valve disk and installed position of the check valve.

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