Published November 1964 | Version v1
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Irradiation Studies of Sealed Fuels for the Dragon Reactor Dragon. Dragon Project Report

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Description

Irradiation experiments have been made on ''coated particle'' type fuel. A great number of the particle parameters have been varied for the purpose of this study: kernels containing (Th,U)C2 or (Zr, U)C solid solutions of variable compositions, single- or multi-layer pyrocarbon coatings, with or without a layer of silicon carbide. Irradiation conditions (temperature, burn-up) have also been varied in several facilities either sealed or purged. Results show that it is possible to get very low fission gas releases (R/B = 10-6) at temperatures up to 1600°C. As far as solid fission products are concerned, the best results are observed when using an intermediate layer of silicon carbide within the coating. No influence of the burn-up has yet been observed on the fuel behaviour. (author)

Abstract (French)

Les expériences d'irradiation ont porté sur des combustibles étanches de type ''particules enrobées.'' On a fait varier un grand nombre de paramètres inhérents aux particules: noyaux contenant des solutions solides (Th,U)C2, ou (Zr,U)C de composition variables, revêtements de pyrocarbone monocouche ou multichouches, avec ou sans couche de carbure de silicium. On a fait varier également les conditions d'irradiation (température, taux de combustion) dans divers dispositifs scellés ou balayés par un gaz de purge. Les résultats montrent que l'on peut obtenir une excellente rétention pour des températures allant jusqu'a 1600°C, avec une fraction émise des gaz de fission égale à 10°. Pour ce qui concerne les produits de fission solides, les meilleurs résultats sont obtenus au moyen d'une couche interoalaire de carbure de silicium dans le revêtement. On n'a pas observé jusqu'à présent d'influence du taux de combustion sur la tenue du combustible.

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Additional details

Additional titles

Original title (French)
Etudes Sous Irradiation de Combustibles Etanches Destines au Reacteur Dragon

Publishing Information

Imprint Pagination
34 p.
Report number
DP-R--303

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
54030033
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
BURNUP; FEDERAL REPUBLIC OF GERMANY; FISSION PRODUCT RELEASE; FISSION PRODUCTS; FORSCHUNGSZENTRUM JUELICH; FUELS; HTGR TYPE REACTORS; IRRADIATION; PARTICLES; PYROLYTIC CARBON; SILICON CARBIDES; SOLID SOLUTIONS
Descriptors DEC
CARBIDES; CARBON; CARBON COMPOUNDS; DEVELOPED COUNTRIES; DISPERSIONS; ELEMENTS; EUROPE; GAS COOLED REACTORS; GERMAN FR ORGANIZATIONS; GRAPHITE MODERATED REACTORS; HOMOGENEOUS MIXTURES; ISOTOPES; MATERIALS; MIXTURES; NATIONAL ORGANIZATIONS; NONMETALS; RADIOACTIVE MATERIALS; REACTORS; SILICON COMPOUNDS; SOLUTIONS; WESTERN EUROPE

Optional Information

Notes
Document from Juelich Preservation Project; 17 refs., 14 figs., 2 tabs.