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During a hypothetical severe accident of a light water reactor (LWR), molten corium could fall in the form of jet into a water pool. The jet fragmentation is crucial process during fuel coolant interactions (FCI) which fragment into droplets and disperse in the coolant, and it may cause a steam explosion. This paper deals with a study of computational fluid dynamics KEYWORDS:Fuel-coolant interactions, melt jet instability melt jet fragmentation, jet breakup length.

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