The shipment of Castor containers today is the first transport of highly radioactive material on a river in Germany.
Police were protecting the barge with helicopters, police boats and officers on the banks of the rivers against possible protests by anti-nuclear activists.
The nuclear waste is being taken from the closed-down nuclear plant of Olbrigheim to an interim storage facility in Neckarwestheim. The 50-kilometer (30-mile) journey will take about 12 hours.
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