The 2021 edition of the NUGENIA Technical Area 2 Course on Severe Accident Phenomenology will take place from 25-29 October 2021. This edition is a sequel to the previous Cadarache 2019 and Ljubljana 2017 NUGENIA/TA2 SAP Courses. The course is jointly co-organised by ENEA and the University of Pisa in the NUGENIA TA2 - Severe