If a fraction of 1% of what’s at San Onofre was released, it would create a relatively large problem, said David B. Richardson, professor of environmental and occupational health (and associate dean of research) at UCI. “But here’s the paradox — it would almost be imperceptible to an individual person,” he said. “Small risk over a large population can have really substantial impacts.” … “We can’t say ‘there’s no impact.’ And, all things being equal, we’d like to avoid it,” he said. Risks can be reduced by early interventions, and harm can be mitigated with planning, he said.

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