Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Development of a Fiber-optic Noncontact Temperature Sensor for Measuring the Temperature of Cooled Secondary Water in a Nuclear Power Plant

냉각된 원전 2차계통수의 온도측정을 위한 비접촉식 광섬유 온도센서의 개발

  • Yoo, Wook-Jae (School of Biomedical Engineering, Konkuk University) ;
  • Lee, Bong-Soo (School of Biomedical Engineering, Konkuk University) ;
  • Park, Byung-Gi (Department of Energy & Environmental Engineering, Soonchunhyang University) ;
  • Cho, Young-Ho (Department of Radiological Science, Catholic University of Daegu)
  • 유욱재 (건국대학교 의학공학부) ;
  • 이봉수 (건국대학교 의학공학부) ;
  • 박병기 (순천향대학교 에너지환경공학과) ;
  • 조영호 (대구가톨릭대학교 방사선학과)
  • Received : 2010.01.19
  • Accepted : 2010.05.13
  • Published : 2010.05.31
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Abstract

Generally, a pH value of secondary water in a nuclear power plant should be estimated after sampling and cooling down. In this process, the measurement of temperature is very important because a pH value is varied according to the temperature of secondary water. In this study, a noncontact fiber-optic temperature sensor using a silver halide optical fiber is fabricated to measure the temperature of cooled secondary water. And we have measured an infrared radiation, which is transferred by a silver halide optical fiber from a heat source, using a thermopile sensor. The relationships between the temperature of a heat source and the output voltage of the fiber-optic temperature sensor according to the change of distance and angle are determined. The measurable temperature range of the fiber-optic temperature sensor is from 25 to $60^{\circ}C$. Based on the results of this study, a noncontact temperature sensor using a silver halide optical fiber can be developed for the temperature measurement of the pH sample in the secondary water system.

원전 2차계통수의 pH를 예측을 위해서는 샘플을 채취, 냉각시킨 후 pH를 측정하게 되는데 이 때 샘플의 온도는 pH를 변화시키는 중요한 요인이 된다. 본 연구에서는 할로겐화 은 광섬유를 이용하여 비접촉식 온도센서를 개발하였고, 열전쌍열을 이용하여 열원으로부터 방출되는 적외선을 측정하였다. 열원과 광섬유 끝단 사이의 거리 및 각도 변화에 따른 광섬유 온도센서의 출력신호를 분석하였으며, 광섬유 온도센서로 측정한 온도범위는 $25{\sim}60^{\circ}C$이다. 본 연구결과를 기초로 원전 2차계통수 pH 샘플의 온도를 측정하기 위해 할로겐화 은 광섬유를 이용한 비접촉식 온도센서의 개발이 가능할 것으로 기대된다.

Keywords

References

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