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Development and demonstration of an erosion-corrosion damage simulation apparatus

배관 침부식 손상 연속모사 장비 개발 및 실증

  • 남원창 (서울대학교 에너지시스템공학부) ;
  • 류경하 (한국기계연구원 원자력산업기기연구센터) ;
  • 김재형 (한국기계연구원 원자력산업기기연구센터)
  • Received : 2012.04.23
  • Accepted : 2013.08.28
  • Published : 2013.08.31

Abstract

Pipe wall thinning caused by erosion and corrosion can adversely affect the operation of aged nuclear power plants. Some injured workers owing to pipe rupture has been reported and power reduction caused by unexpected pipe damage has been occurred consistently. Therefore, it is important to develop erosion-corrosion damage prediction model and investigate its mechanisms. Especially, liquid droplet impingement erosion(LDIE) is regarded as the main issue of pipe wall thinning management. To investigate LDIE mechanism with corrosion environment, we developed erosion-corrosion damage simulation apparatus and its capability has been verified through the preliminary damage experiment of 6061-Al alloy. The apparatus design has been based on ASTM standard test method, G73-10, that use high-speed rotator and enable to simulate water hammering and droplet impingement. The preliminary test results showed mass loss of 3.2% in conditions of peripheral speed of 110m/s, droplet size of 1mm-diameter, and accumulated time of 3 hours. In this study, the apparatus design revealed feasibility of LDIE damage simulation and provided possibility of accelerated erosion-corrosion damage test by controlling water chemistry.

Keywords

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