Recent advances in accurate neutronic calculation of GEN-3 LWR reactors

This theoretical and experimental extensive work performed since 2003 allows a reliable prediction of the local flux and Keff (±200 pcm in 1σ) in large GEN-III reactors. The challenging pin-by-pin power prediction is today overcome, and 3D-stochastic TRIPOLI4 or 2D-deterministic APOLLO2.8 calculation uncertainty is decreased from prior ±8% to current ±2.6% value.