Which outcome causes increased neutron flux instability during nuclear reactor operation?

💡 Explanation

Xenon-135 buildup after reactor shutdown causes increased neutron absorption (iodine pit), poisoning reactions. This occurs because the rapid fission stops, and Iodine-135 decays into Xenon-135; therefore negative reactivity increases rather than decreases, impacting flux distribution.

• Which outcome arises when a reversible catalytic reaction reaches equilibrium at high temperatures?
• Which consequence arises when introducing interstitial atoms into steel's lattice?
• Which consequence results when a continuous-wave laser lacks coherence during laser material processing?
• Which outcome increases drastically when exceeding gain saturation within a pulsed laser amplifier?
• Which consequence results when subsurface hydrogen concentration reaches a critical threshold in pipeline steel?
• Which outcome arises when a superconductor is exposed to a strong external magnetic field exceeding its critical field?