Simulation of Cold-Leg Small Break LOCA for ATLAS using SPACE Code

SPACE code is a system analysis code for a pressurized water reactor. This code uses two-fluid and three-field system and has the capability to handle multi-dimensional flow. For a few years, a variety of validation tests have been intensively performed to secure the prediction accuracy for interfacial/wall drags, interfacial/wall heat transfers, and droplet generation. Hence, this study is dedicated to show the simulation capability of SPACE code for the integral effect tests. Toward this end, a SBLOCA scenario of the ATLAS integral loop was simulated using SPACE code. The transient was initiated by breaking a cold-leg. The break size was equivalent to 6-inch in APR1400