China has ordered stepped-up monitoring of high-risk radiation sources nationwide, Caixin reported Friday.
The move came nearly a week after a device containing radioactive material was lost in Nanjing.
A metal detector widely used in industrial radiography to check for flaws in metal welds and castings was misplaced at a construction site in Nanjing’s Luhe district on May 9.
The radioactive material was traced three days later but had already caused damage to a street sleeper, the report said.
The Ministry of Environmental Protection, which ordered the radiation checks Wednesday, blamed unqualified workers at Tianjin Hongdi Engineering Inspection Development Co. for the incident.
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