On-The-Fly Towards Pure Monte-Carlo Transient Reactor Core Analysis

In the field of reactor physics the transient behavior of the reactor core is mainly analyzed using deterministic algorithms. However, deterministic algorithms make use of various approximations mainly in geometric and energetic domain which may induce inaccuracy. On the other hand Monte-Carlo analysis, which generally does not require significant approximations, is currently very extensively used in static problems but not in transient analysis. Since nowadays the available computational resources are continuously increasing, the potential use of the Monte-Carlo methodology in the field of reactor transient analysis seems quite attractive. This work is the beginning of a research procedure on this field starting with the development of a transient capability on the open-source Monte-Carlo static code OpenMC. The presented results are encouraging giving motivation for further investigation and development.