Modeling and mitigation of bundle end power peaking in pressure tube heavy water reactor advanced fuels using thorium dioxide
| Autor: | Ashlea V. Colton, Cliff Dugal, Blair P. Bromley, S. Golesorkhi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Heavy water
Thorium dioxide Materials science Fissile material 020209 energy Nuclear engineering Pellets 02 engineering and technology 01 natural sciences 010305 fluids & plasmas Power (physics) chemistry.chemical_compound Nuclear Energy and Engineering chemistry Pressure tube Bundle 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Heavy water reactors |
| Zdroj: | Annals of Nuclear Energy. 120:625-629 |
| ISSN: | 0306-4549 |
| DOI: | 10.1016/j.anucene.2018.06.018 |
| Popis: | Fuel bundle end power peaking in pressure tube heavy water reactors (PT-HWRs), particularly considering advanced reactor fuels (such as thorium-based fuels), was evaluated and a mitigation method was assessed. For bundles containing all the same fuel pellets, power is greatest at the bundle ends due to higher thermal neutron flux there. A method to achieve a flatter axial power profile along a bundle by downblending the fissile content in the end pellets with thorium dioxide was evaluated. The method was shown to be effective, and only a slight reduction in fresh fuel reactivity was observed. |
| Databáze: | OpenAIRE |
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