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← ScienceWhich risk during sustained fusion in a tokamak increases when the plasma binding energy decreases?
A)Increased neutron flux to walls
B)Enhanced helium ash accumulation
C)Plasma major radius instability✓
D)Elevated divertor heat load
💡 Explanation
A decrease in plasma binding energy reduces the stabilizing effect of the magnetic field; therefore, plasma major radius instability increases, rather than simply increased heat load or neutron flux because those are managed via the divertor magnetic field control.
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