Evaluation of ASSERT-PV V3R1 void fraction predictions against the OECD/NEA benchmark data

The subchannel code ASSERT, developed by Atomic Energy of Canada Limited, is assessed against the steady-state void fraction cases from the OECD/NEA BFBT benchmark. Preliminary void fraction predictions from 84 BWR bundle tests were compared to experimentally reported values, and 45.2% of the simulated data fell within the reported experimental error. Overall, the code was able to predict the void fraction to within ±0.10 of the experimental …