Which risk increases when nuclear reactor cooling fails?

💡 Explanation

Coolant failure reduces heat removal, causing fuel meltdown and increased neutron flux. This triggers a rapid positive feedback loop through **neutron multiplication**, intensifying fission, because more neutrons are absorbed by fresh uranium therefore runaway fission increases, rather than suppressing as control rods do.

• Which risk significantly increases when operating a Carnot engine near absolute zero?
• Which signal distortion results when light bends near matter?
• Which outcome occurs when a pulsed laser ablates microcapacitors?
• Which outcome regarding nuclear waste occurs when spent nuclear fuel rods are reprocessed to separate isotopes?
• Which consequence occurs in mass spectrometers with unstable isotopes?
• Which risk increases when metallic grain boundaries migrate during annealing?