21.   But the U.N. atomic agency plays down that threat, saying the danger is limited to radioactive dust getting out and contaminating the local area around the power plant.

22.   Either way, it is likely that another plume of highly radioactive dust would be sent over Europe, the report concluded, according to The Observer.

23.   Experts long have feared that parts of the ramshackle shelter could crash onto the ruins of the reactor, sending a cloud of radioactive dust into the atmosphere.

24.   Fifteen years after the nuclear accident at Chernobyl, scientists and are using the site to develop new technologies to prevent the leakage of radioactive dust and particles.

25.   Experts fear that parts of the ramshackle shelter could crash onto the ruins of the reactor, sending a cloud of radioactive dust into the atmosphere.

26.   Officials there said the danger was limited to radioactive dust escaping and contaminating the area around the plant.

27.   On Thursday, a worker disposed of some radioactive material in a container that was not completely sealed, releasing some radioactive dust.

28.   Regular radiation checks on CERN staff did not take into account radioactive dust inhaled or contamination on hands, they said.

29.   Respirator use, to filter out the radioactive dust, was inconsistent and often considered voluntary, the report said.

30.   Some of that earth became radioactive dust that floated over Utah.