The NEA Thermochemical Database project develops reference thermodynamic values for compounds relevant to radioactive waste safety and geochemical modeling.

oecd-nea.org/jcms/pl_22166/thermochemical-data…
Thermochemical Database homepage screenshot

About Thermochemical Database

The Thermochemical Database (TDB) Project from the Nuclear Energy Agency (NEA) builds a reference set of chemical thermodynamic values for radioactive waste repository safety work. Its values are meant for geochemical modelling of those systems. Expert teams from universities and research institutes review primary experimental sources, and the project's reports explain how each selected value was chosen. The scope is thermodynamic data only, so diffusion, kinetics and sorption data fall outside it.

Pricing is not clearly stated.

Key features

  • Reference thermodynamic values for radioactive waste repository safety
  • Formation data for aqueous species and solid phases
  • Gibbs energies, enthalpies, entropies and heat capacities
  • Chemical reactions with corresponding thermodynamic data
  • Reports documenting how values were selected
  • Project phase history and participating countries
Best for: Teams doing geochemical modelling of radioactive waste repository systems that need reference thermodynamic values.
Good for
  • Values selected through critical review of primary experimental sources by expert teams
  • 15 authoritative volumes published over 35 years
Watch out for
  • Excludes diffusion, kinetics and sorption data

Thermochemical Database at a glance

Type
Website
Pricing
Not confirmed. Check the site
Platforms
Web
Details verified
Oct 21, 2026 · Official source
Open source
Not stated
Language
English
Last checked
Oct 5, 2026 · Online when checked
Listed
Oct 5, 2026

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