Which outcome occurs when reactor-grade uranium, highly enriched in the isotope uranium-235, undergoes neutron bombardment without sufficient control rods?

💡 Explanation

Uncontrolled neutron bombardment initiates nuclear fission; because increased U-235 concentration increases fission probability, neutron multiplication through a chain reaction accelerates exponentially unless neutron absorption via control rods dominates. Therefore, a runaway reaction is likely rather than stability, due to uncontrolled fission.

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