Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Survivability assessment of Viton in safety-related equipment under simulated severe accident environments

  • Ryu, Kyungha (Research Division of Environmental and Energy Systems, Department of Nuclear Equipment Safety, Korea Institute of Machinery and Materials) ;
  • Song, Inyoung (Department of Nuclear Engineering, School of Mechanical, Aerospace, and Nuclear Engineering, Ulsan National Institute of Science and Technology (UNIST)) ;
  • Lee, Taehyun (Research Division of Environmental and Energy Systems, Department of Nuclear Equipment Safety, Korea Institute of Machinery and Materials) ;
  • Lee, Sanghyuk (Research Division of Environmental and Energy Systems, Department of Nuclear Equipment Safety, Korea Institute of Machinery and Materials) ;
  • Kim, Youngjoong (Research Division of Environmental and Energy Systems, Department of Nuclear Equipment Safety, Korea Institute of Machinery and Materials) ;
  • Kim, Ji Hyun (Department of Nuclear Engineering, School of Mechanical, Aerospace, and Nuclear Engineering, Ulsan National Institute of Science and Technology (UNIST))
  • Received : 2017.09.20
  • Accepted : 2018.02.27
  • Published : 2018.06.25
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Abstract

To evaluate equipment survivability of the polymer Viton, used in sealing materials, the effects of its thermal degradation were investigated in severe accident (SA) environment in a nuclear power plant. Viton specimens were prepared and thermally degraded at different SA temperature profiles. Changes in mechanical properties at different temperature profiles in different SA states were investigated. The thermal lag analysis was performed at calculated convective heat transfer conditions to predict the exposure temperature of the polymer inside the safety-related equipment. The polymer that was thermally degraded at postaccident states exhibited the highest change in its mechanical properties, such as tensile strength and elongation.

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References

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