Modelling fuel cycle events and advancing time in SITON v2.0

The presentation covers how SITON v2.0, a dynamic, discrete facilities/discrete materials fuel cycle simulator models the events of the nuclear fuel cycle. SITON contains all facility types that are important from the point of view of natural uranium utilisation and waste management. The irradiated fuel composition is determined via burnup tables of FITXS-based burnup module. SITON tracks 52 nuclides among which 25 fission products and 27 actinides. In SITON the survey of requests and the fulfilment of requests are decoupled. This solution allows to track triggered requests in the past and ensures that all requests are taken into account at the proper time. Besides highlighting the advantages of the current modelling approach the presentation tries to address its limitations as well. This document is composed of an introduction and the slides of the presentation.