Reactor cooling systems thermal–hydraulic assessment of the ASTEC V1.3 code in support of the French IRSN PSA-2 on the 1300MWe PWRs

Simulation of the OECD/NEA Sandia Fuel Project Phases I & II ignition tests with DRACCAR

“…It is currently coupled to the two phase flow module CESAR of the ASTEC code (Trégourès 2010). The combination of DRACCAR and CESAR codes enable the modelling of various phenomena including heat transfer (HT) within solids and HT to the fluid, material property evolution (growth of an oxidic layer, phase change), contact between structures and cladding integrity (Bascou 2015).…”

Development and validation of the multi-physics DRACCAR code

“…The DRACCAR code is currently coupled to the two phase flow module CESAR of the ASTEC code (Trégourès et al, 2010). CESAR is a 5-equation model thermal-hydraulics code: two mass balance equations, two energy balance equations and one mean momentum balance equation.…”

Modeling of AP1000 and simulation of 10-inch cold leg small break LOCA using the CESAR thermal-hydraulic module of ASTEC

“…The break critical flow rate is based on the Gros D'Aillon correlation whereas the heat transfer coefficient between the structure and the fluid is based on a boiling curve (Tregoures and Philippot, 2010). The different heat transfer processes are modeled: forced convection to liquid, nucleate boiling, critical heat flux, transition boiling, film boiling, forced convection to vapor and radiative heat transfer.…”