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← ScienceWhich outcome causes accelerated wear in fusion reactor walls?
A)Neutron activation produces radioactive isotopes
B)Helium embrittlement reduces material ductility✓
C)Magnetic confinement dissipates energy
D)Plasma quenches triggers runaway reactions
💡 Explanation
Helium embrittlement causes accelerated wear because helium atoms, generated by fusion neutrons interacting with the reactor wall, diffuse into the material and form bubbles; therefore, ductility decreases rather than increased activation or plasma effects, leading to easier cracking under stress.
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