U3O8$86.00/lb▼0.62%|CCJ$121.08▲2.31%|OKLO$74.44▲4.12%|CEG$198.45▲1.15%|URA$28.90▲1.51%|URNM$52.30▲2.84%|NXE$12.57▲3.42%|U3O8$86.00/lb▼0.62%|CCJ$121.08▲2.31%|OKLO$74.44▲4.12%|CEG$198.45▲1.15%|URA$28.90▲1.51%|URNM$52.30▲2.84%|NXE$12.57▲3.42%|
SECOND ATOMIC AGE

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 terms

Beyond-Design-Basis AccidentCore Damage FrequencyProbabilistic Risk Assessment

Related reactors

Fukushima Daiichi