The ASTEC code, jointly developed since several years by IRSN and GRS, is progressively becoming the reference European severe accident integral code through in particular the intensification of research activities carried out since 2004 in the frame of the SARNET European Network of Excellence. The first version of the new series ASTEC V2 has been released in July 2009 to SARNET partners involved in the WP4 work-package. This new version provides users with significant modelling improvements with respect to the latest V1 version. In particular, the V2.0 version includes advanced core degradation models (issued from the ICARE2 IRSN mechanistic code) and the ASTEC applicability has been extended to Gen III reactor designs, so that the V2.0 allows to simulate the EPR reactor or to launch investigations about the In-Vessel melt Retention concept. Besides these two key-evolutions, most of the other physical modules have also been improved and ASTEC V2 is now coupled to the SUNSET statistical tool to make easier the uncertainty and sensitivity analyses. Moreover, a first revision V2.0-rev1 was frozen in spring 2010, mainly for the feedback of maintenance activities. Beyond the need to develop an adequate model for the reflooding of a degraded core, the main other mean-term and long-term objectives are the extension of the scope of application to BWR and CANDU reactors.