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Cake day: July 15th, 2023

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  • As far as I know (I’m not an expert), negative void coefficient only affects the fission reaction, i.e. the controlled splitting of uranium atoms. The uranium atoms split into smaller unstable atoms, which decays over time causing heat. If the decay heat isn’t removed, the core will melt.

    Pebble Bed Reactors seem to be generation IV reactors, and I don’t think there are any generation IV reactors in commercial use as of today. Again, my knowledge is limited, but I believe most reactors in commercial use are some kind of water cooled, water moderated reactors. For example, European Pressurised Reactor (EPR) is one of the latest designs commissioned in commercial use, and that design includes 4 emergency coolant systems.















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