Source of radioactive cloud not found
Print Edition
International experts have not been able to find what caused a cloud of radioactive pollution that spread over Europe last year and prompted fears of a nuclear leak, Swedish authorities said yesterday.
Monitoring stations recorded high levels of a radioactive isotope in the air over most European cities at the beginning of October.
Scientists from France said soon afterward they thought the source was an accident at a nuclear facility in Russia or Kazakhstan 鈥 a suggestion dismissed by both countries.
A group of experts formed to investigate the incident had now decided there was not enough information to pinpoint the origin, Sweden鈥檚 radiation safety authority, one of the group鈥檚 members, said yesterday.
鈥淎vailable data does not provide sufficient information to verify that the Ru-106 emissions originate from any of the activities that have been assumed to cause the event,鈥 the Swedish authority said.
The authority was referring to ruthenium 106, the radioactive isotope identified by the monitoring stations that does not occur naturally and is the product of splitting atoms in a nuclear reaction.
The commission of experts met last week and decided its member groups could return to their countries and carry on their research independently.
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