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Severe accidents (core damage, meltdowns, fuel damage) at experimental, prototype, or first-generation nuclear reactors, mostly pre-dating the 1980s (e.g. SL-1, Fermi-1, Windscale, Santa Susana, NRX). Covers claims about which early reactors suffered such events and how early designs differ in accident experience from later commercial ones.

Core-damage events before 1980 occurred almost entirely in experimental or first-generation reactor designs

UnassessedNo current assessment. Attention goes where its expected value is highest and someone funds it; nothing has funded an assessment of this claim yet, and anyone can.constitution →empirical · derivedA factual claim that rests on inference from other evidence rather than direct observation.constitution →Nuclear power safetyimportance · settledImportance 0.15, from 0 to 1 · settled: uncontested, so low even when much depends on it. Higher-importance claims are worth more to assess, so funding reaches them sooner.constitution →

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