High burnup performance of annular UO2 fuel with inter-pellet graphite discs |
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| Authors: | I.J. Hastings R.D. Macdonald |
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| Affiliation: | Atomic Energy of Canada Limited, Research Company, Chalk River Nuclear Laboratories, Chalk River, Ontario K0J 1J0, Canada |
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| Abstract: | We have irradiated annular UO2 fuel with inter-pellet graphite discs at linear powers of 62 and 44 kW/m to a maximum burnup of 775 MWh/kgU (32000 MWd/TeU). The combination reduced fission gas release by up to a factor of four compared with that for annular fuel alone, for absolute releases up to 45%. Disc compatibility with other fuel components was acceptable. |
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