Impact of the specified valves characteristics on the transient processes of nuclear reactor core cooling

Authors

  • S. Žiedelis
  • A. Adomavičius
  • V. Ognerubov

Abstract

The results of computational analysis of hydraulic characteristics of the fast acting motor valves are presented in this paper. The significant difference is identified be-tween calculated characteristics of the change of the valve’s pressure loss coefficient during the valve’s open-ing/closure process in respect to those used as default ap-proach in codes for thermal-hydraulic calculations of nu-clear reactors. The change of valve’s hydraulic resistance at the very beginning of an accident causes the reduction of coolant flow rate delivered from the emergency core cool-ing system, abatement of core cooling intensiveness and the increase of maximal temperature of fuel element sur-face.

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Published

2006-04-10

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Section

Articles