Severe Accident
Severe accident involves core melting, hydrogen generation, and potential containment breach, beyond design-basis events.
Progression: cladding oxidation >1200°C, fuel melting >2800°C, corium relocation. Mitigation via in-vessel retention or filtered venting. MAAP code models sequences with CDF inputs.
Why it matters now
Severe accident management bolsters 2025-2026 investor trust in restarts and SMRs for data centers. Post-Fukushima upgrades address Fukushima lessons.
Related reactors
Fukushima Daiichi