Qualification of advanced LEU fuels for high-power research reactor conversion designs

Euratom Research and Training in 2025: ‘Challenges, achievements and future perspectives’, edited by Roger Garbil, Seif Ben Hadj Hassine, Patrick Blaise, and Christophe Girold

Open Access

Table 2.

TRL descriptions for HPRR fuel systems.

TRL	Equivalent description for research reactor fuels
TRL-4	Lab scale fabrication demonstration
TRL-5	Mini-scale fuel plates successfully irradiated
TRL-6	Full-scale fuel plates successfully irradiated in relevant conditions
TRL-7	Successful irradiation of a representative fuel assembly, e.g. a GTA ⁽¹⁾
TRL-8	Successful LTA ⁽²⁾/first of a kind of specific fuel assembly + approved for use in specific research reactor
TRL-9	Operational use of fuel assemblies in a reactor

⁽¹⁾

Generic Test Assembly (GTA); an experimental device used at the BR2 reactor, mimicking the plate and assembly design as well as target irradiation conditions of a ‘client’ HPRR assembly.

⁽²⁾

Lead Test Assembly (LTA); a full scale reactor specific fuel assembly.

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