Following from the successful inaugural PhD conference in radioactive waste management and disposal held in Nancy, France in 2015, the 2nd conference in this series was held in Delft, the Netherlands. This unique event intend brought together PhD students and early-stage researchers, alongside professionals and academics in the topic of radioactive waste disposal and geological disposal. The conference was designed to be simultaneously a research school and a conference. This proceedings is the collection of abstracts from the PhD students and early-stage researchers. The expert lectures can be found here: https://collegerama.tudelft.nl/mediasite/Showcase/Channel/petrus-opera-2016