Twelfth Workshop of  OECD/NEA Benchmark for Uncertainty Analysis in Best-Estimate Modelling (UAM) for Design, Operation and Safety Analysis of LWRs (LWR-UAM-12) will take place on May 16-17, 2018 in Lucca, Italy in conjunction with BEPU-2018 conference on multi-physics and multi-scale simulations with uncertainty. The NCSU Nuclear Engineering faculty – Dr. Maria Avramova, and Dr. Kostadin Ivanov in cooperation with Dr. Eric Royer, CEA, France are coordinators of the benchmark workshop and activities.