We are approaching the era with blurred boundary between hardware and software: hardware is getting more and more flexibility for fast development and configuration - we are programming hardware; critical software is being built on chip for high performance - we are also coining software. The author of this book try to build such a bridge to import the new high speed computation architecture based on FPGA to the simulation of neutron transport in nuclear reactor. After the most recent Fukushima accident in Japan, there is no doubt for more effort on reactor safety. This book represents first...