Fuel Test Loop(FTL) is a facility which could conduct a fuel irradiation test at HANARO (High-flux Advanced Neutron Application Reactor). FTL simulates commercial NPP’s operating conditions such as the pressure, temperature and neutron flux levels to conduct the irradiation and thermo- hydraulic tests. The In-Pile Test Section(IPS) installed in HANARO FTL is designed as a pressure vessel design conditions of 350℃, 17.5MPa. The instrumentation MI-cables for thermocouples, SPND and LVDT are passed through the sealing plug, which is in the pressure boundary region and is a part of instrumentation feedthrough of MI-cable. In this study, the brazing method and performance test results are introduced to the sealing plug with BNi-2 filler metal, which is selected with consideration of the compatibility for the coolant. The performance was verified through the insulation resistance test, hydrostatic test, and helium leak test.

Abstract
 1. 서론
 2. 계장선 통과부위 밀봉
  2.1 핵연료 노내조사시험설비
  2.2 노내시험부 내부조립체
  2.3 계장선 통과부위 밀봉 성능기준
 3. 브레이징 수행
  3.1 Sealing Plug 및 계장선
  3.2 용가재 선정
  3.3 브레이징 수행 방법
 4. 성능시험 및 결과
  4.1 성능시험
  4.2 성능시험 결과
 5. 결론
 후기
 참고문헌

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