Experimental Investigation of Quench Phenomena and Two-Phase Flow Behavior for Hot Horizontal Tubes Well Above the Limiting Temperature for Solid–Liquid Contact
NURETH-14 - 2011 September 25-30


Presented at:
NURETH-14
2011 September 25-30
Location:
Toronto, Canada
Session Title:
E4-1 NPP Transients and Accidents Analysis

Authors:
Kifah Takrouri (McMaster University)
John Luxat (McMaster University)
Mohamed Hamed (McMaster University)
  

Abstract

Quench cooling of a hot dry surface involves the rapid decrease in surface temperature by a sudden contact with a coolant. Situations involving quenching are encountered in a number of postulated accidents in Canada Deuterium Uranium (CANDU) reactors, such as quenching of a hot calandria tube in certain Loss of Coolant Accidents (LOCA). In this study, an experimental setup has been built and a series of experiments were conducted to investigate quenching of hot horizontal tubes by a water multi-jet system. The effects of key role parameters on the re-wetting delay time, the re-wetting front velocity and the quench and re-wetting temperatures were investigated. These variables were found to be strongly dependent on water subcooling. The effects of initial surface temperature, jet velocity and surface curvature were also investigated.

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