OSAKA -- The exhaust pipe of a nuclear waste incinerator in Kawachinagano, Osaka Prefecture, ruptured Thursday, exposing a female worker to a small amount of soot, police said.
The 25-year-old employee was not exposed to radioactive substances, agrochemical maker Nihon Nohyaku Co. said, adding that no radiation had been detected outside its facility.
Nihon Nohyaku was burning carbon-14 dissolved in toluene and other volatile fluids when the pipe, connected to a device to filter out soot, ruptured at around 10:15 a.m.