"We can't teach the world about radiation but we ... housing the source as a warning not to dismantle it or get any closer. Many manufacturers plan to use the symbol on new large sources.

When remediation begins, the "DO NOT DIG" signs will be replaced with a "CAUTION CONTAMINATION AREA" sign that features the trefoil symbol, also know as the radiation warning symbol. Pannier said ...

It was stored in a bright yellow case with the trefoil symbol for radiation warning on it. Noel Byrne, from the Environmental Protection Agency (EPA), told RTÉ Radio that it was “highly ...