Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Development of Highly Reliable Power and Communication System for Essential Instruments Under Severe Accidents in NPP

  • Choi, Bo Hwan (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology) ;
  • Jang, Gi Chan (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology) ;
  • Shin, Sung Min (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology) ;
  • Lee, Soo Ill (I&C Group, Korea Hydro & Nuclear Power Co., Ltd., Central Research Institute) ;
  • Kang, Hyun Gook (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology) ;
  • Rim, Chun Taek (Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology)
  • Received : 2015.11.11
  • Accepted : 2016.03.23
  • Published : 2016.10.25
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Abstract

This article proposes a highly reliable power and communication system that guarantees the protection of essential instruments in a nuclear power plant under a severe accident. Both power and communication lines are established with not only conventional wired channels, but also the proposed wireless channels for emergency reserve. An inductive power transfer system is selected due to its robust power transfer characteristics under high temperature, high pressure, and highly humid environments with a large amount of scattered debris after a severe accident. A thermal insulation box and a glass-fiber reinforced plastic box are proposed to protect the essential instruments, including vulnerable electronic circuits, from extremely high temperatures of up to $627^{\circ}C$ and pressure of up to 5 bar. The proposed wireless power and communication system is experimentally verified by an inductive power transfer system prototype having a dipole coil structure and prototype Zigbee modules over a 7-m distance, where both the thermal insulation box and the glass-fiber reinforced plastic box are fabricated and tested using a high-temperature chamber. Moreover, an experiment on the effects of a high radiation environment on various electronic devices is conducted based on the radiation test having a maximum accumulated dose of 27 Mrad.

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References

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