Thermodynamic Characterisation of Fuel Debris and Fission Products Based on Scenario Analysis of Severe Accident Progression at Fukushima Daiichi Nuclear Power Station (TCOFF)
Joint project

The TCOFF project provides a framework for the exchange of technical information on topics related to thermodynamic databases available for modelling the fuel/core degradation process, which include thermodynamic functions/models, experimental data, calculation tools, calculation methods for quasi-equilibrium systems, and prioritisation of items for improvement/enlargement, with reference to the accidental scenario at the Fukushima Daiichi nuclear power station (NPS). The project aims to:

  • improve the quality and/or inventory of thermodynamic databases, which are used for severe accident analyses with a reference to the severe accident progression at different units of the Fukushima Daiichi NPS
  • conduct joint thermodynamic evaluations of the severe accident progression at in-vessel and ex-vessel phases at units 1, 2 and 3 of the Fukushima Daiichi NPS, aiming at characterising fuel melting; molten core relocation; fission product behaviour; the chemical and phase composition of fuel debris; and the thermodynamic evaluation of the formation of materials, which may potentially be detected at the Fukushima Daiichi NPS.


TCOFF members' area (password protected | reminder)