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Development of Induction Brazing System for Sealing Instrumentation Feedthrough Part of Nuclear Fuel Test Rig

핵연료조사리그 계장선 통과부위의 밀봉을 위한 유도 브레이징 시스템 개발

  • Hong, Jintae (Dept. of Research Reactor Applications, Korea Atomic Energy Research Institute) ;
  • Kim, Ka-Hye (Dept. of Research Reactor Applications, Korea Atomic Energy Research Institute) ;
  • Heo, Sung-Ho (Dept. of Research Reactor Applications, Korea Atomic Energy Research Institute) ;
  • Ahn, Sung-Ho (Dept. of Research Reactor Applications, Korea Atomic Energy Research Institute) ;
  • Joung, Chang-Young (Dept. of Research Reactor Applications, Korea Atomic Energy Research Institute) ;
  • Son, Kwang-Jae (Dept. of Research Reactor Applications, Korea Atomic Energy Research Institute) ;
  • Jung, Yang-Il (LWR Fuel Technology Division, Korea Atomic Energy Research Institute)
  • 홍진태 (한국원자력연구원 연구로이용연구본부) ;
  • 김가혜 (한국원자력연구원 연구로이용연구본부) ;
  • 허성호 (한국원자력연구원 연구로이용연구본부) ;
  • 안성호 (한국원자력연구원 연구로이용연구본부) ;
  • 정창용 (한국원자력연구원 연구로이용연구본부) ;
  • 손광재 (한국원자력연구원 연구로이용연구본부) ;
  • 정양일 (한국원자력연구원 경수로핵연료기술개발부)
  • Received : 2013.08.06
  • Accepted : 2013.10.07
  • Published : 2013.12.01

Abstract

To test the performance of nuclear fuels, coolant needs to be circulated through the test rig installed in the test loop. Because the pressure and temperature of the coolant is 15.5 MPa and $300^{\circ}C$ respectively, coolant sealing is one of the most important processes in fabricating a nuclear fuel test rig. In particular, 15 instrumentation cables installed in a test rig pass through the pressure boundary, and brazing is generally applied as a sealing method. In this study, an induction brazing system has been developed using a high frequency induction heater including a vacuum chamber. For application in the nuclear field, BNi2 should be used as a paste, and optimal process variables for Ni brazing have been found by several case studies. The performance and soundness of the brazed components has been verified by a tensile test, cross section test, and sealing performance test.

Keywords

Induction Brazing;Nuclear Fuel Test Rig;Ni Brazing;Sealing of Instrumentation Cables

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