Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Reopening Phenomena of the 2.25Cr-1Mo Steel Specimen by Self-wastage

Self-wastage에 의한 2.25Cr-1Mo Steel 시편의 Re-open 현상

  • Jeong, Kyung-chai (Korea Atomic Energy Research Institute, KALIMER Technology Development Team) ;
  • Kwon, Sang-woon (Korea Atomic Energy Research Institute, KALIMER Technology Development Team) ;
  • Choi, Jong-hyeun (Korea Atomic Energy Research Institute, KALIMER Technology Development Team) ;
  • Park, Jin-ho (Korea Atomic Energy Research Institute, KALIMER Technology Development Team) ;
  • Hwang, Sung-tai (Korea Atomic Energy Research Institute, KALIMER Technology Development Team)
  • 정경채 (한국원자력연구소 KALIMER 기술개발팀) ;
  • 권상운 (한국원자력연구소 KALIMER 기술개발팀) ;
  • 최종현 (한국원자력연구소 KALIMER 기술개발팀) ;
  • 박진호 (한국원자력연구소 KALIMER 기술개발팀) ;
  • 황성태 (한국원자력연구소 KALIMER 기술개발팀)
  • Received : 1999.01.19
  • Accepted : 1999.04.28
  • Published : 1999.06.10
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Abstract

Experiments on micro-leak of water were carried out with the water injecting simulator in liquid sodium atmosphere. The leak path was plugged by the sodium-water reaction products in the 2.25Cr-1Mo steel specimen. However, leak paths re-opened in most cases. The self-wastage patterns were not affected by the sodium temperature in the re-opened specimen. The diameter of the defected area, including the re-opened part, was about 5 min. It took 143, 40.7 and 34.7 minutes to re-open the leak path at 450, 475, and $510^{\circ}C$, respectively. It was concluded that the reopening time decreased with the increasing temperature.

누출시험 장치를 이용하여 미량 물 누출 실험을 수행하였다. 2.25Cr-1Mo 시편의 누출경로는 나트륨-물 반응 생성물에 의해 plugging되는 경우가 발생하였으나, 대부분 re-open상태를 나타내었다. 또한 누출 경로가 완전 re-open된 후 나트륨 부위에서 시편의 self-wastage pattern은 온도에 영향을 받지 않음을 알 수 있었으며, 누출경로가 re-open 되면서 나타나는 defected 크기는 대략 5 mm 이내임을 알 수 있었다. 누출 경로가 완전 re-open 되는데 걸리는 시간은나트륨 온도가 높을수록 짧게 나타났으며, 평균적으로 $450^{\circ}C$에서 143분, $475^{\circ}C$의 경우 40.7분, $510^{\circ}C$의 경우 34.7분을 나타내었다.

Keywords

Acknowledgement

Supported by : 과기부

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