Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Experimental testing and evaluation of coating on cables in container fire test facility

  • Aurtherson, P. Babu (Department of Mechanical Engineering, DMI Engineering College) ;
  • Hemanandh, J. (School of Mechanical Engineering, Sathyabama Institute of Science and Technology) ;
  • Devarajan, Yuvarajan (Department of Automobile Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences) ;
  • Mishra, Ruby (School of Mechanical Engineering Department, Kiit deemed to be University) ;
  • Abraham, Biju Cherian (Department of Mechanical Engineering, Mar Athanasius College of Engineering)
  • Received : 2021.10.01
  • Accepted : 2021.11.20
  • Published : 2022.05.25
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Abstract

Fire tests were conducted on cables using fire-retardant paint employed in nuclear power plants that transmit electrical power, control and instrument signals. The failure criteria of various power and control cables coated with fire retardant coating at three different coating thicknesses (~0.5 mm, 1.0 mm & 1.5 mm) were studied under direct flame test using Container Fire Test Facility (CFTF) based on standard tests for bare cables. A direct flame fire test was conducted for 10 min with an LPG ribbon burner rated at ten by fixing the cable samples in a vertical cable track. Inner sheath temperature was measured until ambient conditions were achieved by natural convection. The cables are visually evaluated for damage and the mass loss percentage. Cable functionality is ascertained by checking for electrical continuity for each sample. The thickness of cable coating on fire exposure is also studied by comparing the transient variation of inner sheath temperature along the Cable length. This study also evaluated the adequacy of fire-retardant coating on cables used for safety-critical equipment in nuclear power plants.

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