Gaseous fission reactor

A gas core reactor, and the very closely related vapor core reactor, is a proposed kind of nuclear reactor in which the nuclear fuel would be in a gaseous state rather than liquid or solid. In this type of reactor, the only temperature-limiting materials would be the reactor walls, and with appropriate cooling of the walls, the reactor can run at much higher temperatures. Conventional reactors have stricter limitations because the core would melt if the fuel temperature were to rise too high.

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