PATMOS: A prototype Monte Carlo transport code to test high performance architectures

PATMOS is a prototype for Monte Carlo neutron transport under development at CEA. It is dedicated to the testing of algorithms for high performance computations on several modern architectures. The final goal is to demonstrate the feasibility of pin-by-pin full core depletion calculations for large nuclear power reactors with realistic temperature fields. In this paper we show PATMOS hybrid parallelism performances on Intel Xeon and Xeon Phi recent architectures. We also show the vectorization of the SIGMA1 algorithm for use in our on-the-fly Doppler broadening and its performances. Results with off-loading to GPUs in heterogeneous architectures are also presented. (authors)