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← ScienceWhich constraint requires pulsed operation of fusion-fission hybrid reactors?
A)Fuel breeding blankets overheat rapidly✓
B)Neutron activation degrades structural materials
C)Plasma instability collapses the confinement
D)Tritium diffusion increases at steady-state
💡 Explanation
Overheating requires pulsed operation because during fission, radiative capture drives significantly higher power deposition on the blanket, exceeding cooling capacity and melting the material; therefore pulsed operation is needed, rather than risking a runaway fission reaction which steady fuel flow minimizes.
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