Research on Gas Behavior of Flow and Heat Transfer in Containment with the Effect of PCS
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Abstract
Passive safety systems are widely used to remove heat inside containment in advanced PWR nuclear power plants, passive containment cooling system (PCS) based on open natural circulation scheme is introduced to Russia AES-2006 reactor. Gas flow and heat transfer in containment with effect of this kind of PCS is numerically investigated in this paper. The results indicate that: gas flows downwards with the effect of condensation in containment area below PCS while gas flow in the area above PCS is stagnant; vapor mass fraction and mixture temperature is stratified in vertical direction while the distribution is homogeneous; PCS condensation rate remains nearly constant during the whole simulation time. Research in this paper benefits the research and design of PCS for domestic advanced PWR.
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