European ports including Rotterdam and Antwerp are tightening safety checks as they prepare to unload the first ships from Japan since last month’s earthquake led to radioactive discharges from a damaged nuclear plant.

Rotterdam, Europe’s biggest container port, will screen for radiation while ships are still at sea. Antwerp, the No. 2, will make similar checks aboard vessels for which Japan was one of the last 10 ports of call, with any abnormal readings triggering an inspection by Belgium’s Federal Agency for Nuclear Control.

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