Carbon monoxide formation in UO2 kerneled HTR fuel particles containing oxygen getters
| Autor: | Anton Strigl, Emil Proksch, Heinz Nabielek |
|---|---|
| Rok vydání: | 1986 |
| Předmět: |
Nuclear and High Energy Physics
Range (particle radiation) Fabrication Materials science Radiochemistry chemistry.chemical_element Oxygen Carbide chemistry.chemical_compound Nuclear Energy and Engineering Chemical engineering chemistry Getter General Materials Science Uranium carbide Irradiation Carbon monoxide |
| Zdroj: | Journal of Nuclear Materials. 139:83-90 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/0022-3115(86)90025-5 |
| Popis: | Mass spectrometric measurements of CO in irradiated UO2 kerneled HTR fuel particles containing various oxygen getters are summarized and evaluated. Uranium carbide addition in the 3 to 15% range reduces the CO release by factors between 25 and 80, up to burn-up levels as high as 70% FIMA. Unintentional gettering by SiC in TRISO coated particles with failed inner pyrocarbon layers results in CO reduction factors between 15 and 110. For ZrC, only somewhat ambiguous results have been obtained; most likely, ZrC results in CO reduction by a factor of about 40. Ce2O3 and La2O3 seem to be somewhat less effective than the three carbides; for Ce2O3, reduction factors between 3 and 15 have been found. However, these results are possibly incorrect due to premature oxidation of the getter already during fabrication. Addition of SiO2 + Al2O3 has no influence on CO release at all. |
| Databáze: | OpenAIRE |
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