Which outcome results when protium is completely depleted in a fusion reactor using deuterium and tritium fuel?

💡 Explanation

When protium is severely depleted, the overall fusion reaction rate drops because D-D, D-T reactions now dominate; reduced fusion lowers neutrons produced. Therefore a significant reduction in neutron flux results, rather than increased radiation, wall erosion, or changed alpha confinement, stemming from reduced fusion reactivity.

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