OECD/NEA Nuclear Science Committee (NSC)
Expert Group on Scientific Issues of Fuel Behaviour (TFSFB)



The Expert Group deals with the status and trends of scientific issues of fuel behaviour.


Compile high-quality experiments for the International Fuel Performance Experiments (IFPE) database. Emphasis is given to high burn-up in water reactors under normal operating conditions. Priority goes to completed international programmes, the data of which would otherwise be lost, but also to data released from national programmes.

Co-ordinate the qualification of these data through review and by organising user group meetings. Take initiatives so that it may be adopted as an international standard. Co-ordinate computer code validation and benchmark studies.

Work Plan

Organise co-ordination meetings combined with IFPE database user group meetings every 12-18 months. The IFPE database will be consolidated during the next two years through updating and addition of new experiments.

Seminars and experts' meetings will be held as needed to address high-priority issues for validating the modelling of phenomena of particular concern (thermal performance, fission gas behaviour, pellet-clad mechanical interaction, etc.).


This activity will be carried out in co-ordination with the IAEA, the NEA/CSNI Special Expert Group on Fuel Safety Margins and the OECD/IFE Halden Reactor Project.

Duration: two years.

Revision approved by the NEA/NSC: 4 June 1998.
Mandate extended for two years on 9 June 2000.


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Last reviewed: 15 June 2011