Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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On-site water level measurement method based on wavelength division multiplexing for harsh environments in nuclear power plants

  • Lee, Hoon-Keun (Department of Safety Research, Korea Institute of Nuclear Safety) ;
  • Choo, Jaeyul (Department of Instrumentation, Control and Electrical System, Korea Institute of Nuclear Safety) ;
  • Shin, Gangsig (Department of Safety Research, Korea Institute of Nuclear Safety) ;
  • Kim, Sung-Man (Department of Electronic Engineering, Kyungsung University)
  • Received : 2020.01.28
  • Accepted : 2020.05.06
  • Published : 2020.12.25
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Abstract

A simple water level measurement method based on wavelength division multiplexing (WDM) is proposed and demonstrated. The measurement principle is based on the change of Fresnel reflection occurring at the end facet of the optical fiber tip (OFT). To increase the spatial resolution of water level sensing, a broadband light source (BLS) and an arrayed waveguide grating (AWG) are employed. The OFTs are multiplexed with the dedicated wavelength channels of AWG. By measuring all of the reflection powers reflected at the OFTs with a proposed on-site reflectometer, the water level can be monitored continuously for a fast emergency response. Moreover, it can be implemented easily with the commercially available optical components and devices with the simple configuration.

Keywords

Acknowledgement

This research was partially supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1F1A1045956).

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  3. 16 Ch × 200 GHz DWDM-Passive Optical Fiber Sensor Network Based on a Power Measurement Method for Water-Level Monitoring of the Spent Fuel Pool in a Nuclear Power Plant vol.21, pp.12, 2021, https://doi.org/10.3390/s21124055