DOE-CEA Benchmark on SFR ASTRID Innovative Core: Neutronic and Safety Transients Simulation, International Conference on Fast Reactors and Related Fuel Cycles: Safe Technologies and Sustanable Scenarios (FR13).

摘要

ASTRID is a fast reactor being designed by CEA to achieve a level of safety that exceeds that of conventional fast reactors. In particular an axially heterogeneous core with an upper sodium plenum is employed to achieve a non-positive sodium void reactivity worth. In order to address the simulation challenges for this innovative concept, the USDOE Laboratories (ANL and INL) and CEA are performing neutronic and transient benchmark calculations for an ASTRID model based on design specifications provided by CEA. The blind comparison of the initial DOE and CEA results are found to be in good agreement, enhancing confidence in CEA predictions of key ASTRID safety-relevant parameters and transient behavior. For several parameters compared uncertainties in computed values are significant, and further studies are needed to reduce them.