Which outcome follows helium buildup inside uranium dioxide fuel rods?

💡 Explanation

Reduced thermal conductivity occurs because helium atoms impede phonon transport, a mechanism which normally conducts heat effectively; therefore, heat dissipation decreases, rather than increasing thermal conductivity or affecting moderation, because those rely on neutron interactions.

• Which risk increases when fuel injection timing fluctuations induce turbulence?
• Which mechanism causes increased signal delay near massive stars?
• Which process limits reaction rate when powdered catalyst particles agglomerate during exothermic reaction?
• Which outcome occurs when a PCB trace experiences excessive current density, creating high electron flow?
• Which risk increases when a Venturi meter experiences very high fluid velocity?
• Which consequence occurs when a Wien bridge oscillator's transfer function reaches a pole on the imaginary axis?