Nuclear reactors continue to generate heat even when they are not actively producing power.
Is it true that nuclear reactors continue to generate heat even when they are not actively producing power?
Yes. Nuclear reactors continue to produce residual thermal energy after shutdown due to the radioactive decay of fission products, a phenomenon commonly referred to as decay heat.
Verdict: SUPPORTED · 4 sources for, 0 against · Last checked
The claim is a specific, well-established physical fact about nuclear reactors. Multiple papers in the literature discuss 'decay heat' or the thermal energy generated by spent fuel and shutdown reactors due to radioactive decay.
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Chauthwani, G. C. & Kannan, U. (2019). Development of computer code IGDC for generation and depletion of fission products and actinides in pressure tube type heavy water reactors (PT-HWRs) using Klopfenstien-Shampine numerical differentiation formula (NDF). doi.org. https://doi.org/10.1016/J.NUCENGDES.2018.11.006
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Holdsworth, A., Ireland, E., & Eccles, H. (2025). Spent Nuclear Fuel—Waste to Resource, Part 1: Effects of Post-Reactor Cooling Time and Novel Partitioning Strategies in Advanced Reprocessing on Highly Active Waste Volumes in Gen III(+) UOx Fuel Systems. doi.org. https://doi.org/10.3390/jne6030029
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Kourasis, I., Vilariño, R., Hamilton, O., Ahonsi, B., Chaplin, R., & Davies, T. (2025). Method of Evaluating SMR Decay Heat Removal in a Floating Nuclear Power Plant During Vessel Flooding Scenarios. doi.org. https://doi.org/10.4043/35903-ms
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Vallet, V., Huyghe, J., Vaglio-Gaudard, C., Lecarpentier, D., & Reynard-Carette, C. (2021). NUCLEAR DATA UNCERTAINTY QUANTIFICATION FOR THE DECAY HEAT OF PWR MOX FUELS USING DATA ASSIMILATION OF ELEMENTARY FISSION BURSTS. doi.org. https://doi.org/10.1051/EPJCONF/202124710002
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The claim is a specific, well-established physical fact about nuclear reactors. Multiple papers in the literature discuss 'decay heat' or the thermal energy generated by spent fuel and shutdown reactors due to radioactive decay.
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