Carbon monoxide formation in UO2 kerneled HTR fuel particles containing oxygen getters
Abstract
Mass spectrometric measurements of CO in irradiated UO2 fuel particles containing oxygen getters are summarized. 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, ambiguous results are obtained; ZrC probably results in CO reduction by a factor of 40; Ce2O3 and La2O3 seem less effective than the carbides; for Ce2O3, reduction factors between 3 and 15 are found. However, the results are possibly incorrect due to premature oxidation of the getter already during fabrication. Addition of SiO2 + Al2O3 has no influence on CO release.
- Publication:
-
Unknown
- Pub Date:
- January 1986
- Bibcode:
- 1986cmfu.rept.....P
- Keywords:
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- Carbon Monoxide;
- Getters;
- High Temperature Nuclear Reactors;
- Nuclear Fuels;
- Uranium Oxides;
- Cesium Oxides;
- Lanthanum Oxides;
- Mass Spectroscopy;
- Silicon Carbides;
- Uranium Carbides;
- Zirconium Carbides;
- Nuclear and High-Energy Physics