Title: High-Temperature Reactor Fuel Technology in the European Projects HTR-F1 and RAPHAEL
Other Contributors: PHELIP Mayeul
Citation: Proceedings of 3rd International Topical Meeting on High Temperature Reactor Technology - HTR 2006 p. 1-6
Publisher: North West University
Publication Year: 2006
JRC N°: JRC34920
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC34920
Type: Articles in periodicals and books
Abstract: In April 2005, a new 4-year Integrated Project on Very High Temperature Reactors (RAPHAEL: ReActor for Process Heat And ELectricity) was started as part of EURATOM’s 6th Framework Programme. The Sub-Project on Fuel Technology (SP-FT) is one of eight sub-projects in RAPHAEL, with 8 partners from industry, R&D organizations and a nuclear-safety expertise organization: CEA, FZ Jülich, JRC, Nexia Solutions, AREVA-NP, NRG, Belgonucléaire and IRSN. While the earlier HTR-F and HTR-F1 projects aimed at re-mastering fuel fabrication technology, testing existing state-of-the-art HTR fuels at high burn-up and high temperature and understanding fuel behavior), the R&D conducted in RAPHAEL SP-FT focuses on understanding fuel behavior and determining the limits of state-of-the-art fuel as well as on potential further Fabrication processes will be developed for an alternative kernel composition (UCO), with a potential for decreasing the CO pressure built-up in the particle, and for an alternative coating layer (ZrC), which remains more stable at higher temperature than SiC, thus providing increased Post-irradiation examinations and heat-up tests performed on irradiated fuel will allow investigation of the behavior of state-of-the-art fuel in a VHTR’s normal and accidental conditions. Based on the fuel particle models established in FP5, the fuel modeling capabilities will be improved: An irradiation will be performed in the HFR Petten for measuring the changes in coating material properties as a function of fluence and temperature, with samples coming from the new fabrication process. This will allow introduction of particle behavior models for coatings which are not only more accurate than those presently based on old data, but also more relevant to present materials. Fission-product release modeling and statistical methods will be developed to integrate the individual behavior of thousands of particles within fuel elements. Code benchmarking, started in FP5, will be continued with the acquisition of new experimental data. This paper presents progress in RAPHAEL SP-FT as well as the remaining activities of the earlier HTR-F1 project.
JRC Directorate:Energy, Transport and Climate

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