COBRA-TF (CTF) is a modernized and improved version of COBRA-TF (COlant Boiling in Rod Arrays-Two Fluid) that is used for performing subchannel thermal hydraulic analysis and modeling fuel rod thermo-mechanical behavior in light water reactors.  CTF uses a three-field approach, whereby the vapor, continuous liquid, and droplets can be modeled independently in terms of field velocity.  CTF has a coupling interface that has been used for coupling to other physics tools including neutronics, core chemistry, and fuel performance.

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