Recent modelling improvements of the ASTEC European severe accident code are outlined.
Key new physical models now available in the ASTEC V2.1 major version are described.
ASTEC progress towards a multi-design reactor code is illustrated for BWR and PHWR.
ASTEC strong link with the on-going EC CESAM FP7 project is emphasized.
Main remaining modelling issues (on which IRSN efforts are now directing) are given.