The NEA Thermochemical Database Project: 30 Years of Accomplishments

The NEA Thermochemical Database (TDB) Project (www.oecd-nea.org/dbtdb/) is a joint project of the Radioactive Waste Management Committee and the Databank that was launched in 1984. It consists of a database of chemical thermodynamic values treating the most significant elements related to nuclear waste management,that fills significant gaps in radionuclide chemistry and supports the modeling requirements for performance assessments of radioactive waste disposal systems. The work carried out since the initiation of the project has resulted in the publication of thirteen major reviews and a large set of selected values that have become an international reference in the field. In this presentation we will describe the concept and scientific principles of the TDB project, together with accomplishments and current developments. We will also discuss a very important new activity of TDB that was initiated in August 2015 and involves the renewal of the electronic database. The goal of this initiative is to meet the technological standards of modern thermochemical databases, provide higher flexibility and options for the end users and improve internal consistency, management and maintenance.