Which instability develops if a nuclear reactor's coolant flow decreases?

💡 Explanation

Reduced coolant leads to higher fuel temperatures, which lowers the density, resulting in reduced neutron absorption via thermal expansion, because the moderator effectiveness declines. Therefore, reactivity rises triggering increasingly violent power oscillations from more fission events; rather than stabilization because heat-induced changes prevent equilibrium.

• Which behavior causes reduced impedance in coaxial cables containing dielectric spacers?
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