A reactor at a nuclear power plant in southern Sweden suddenly stopped due to a turbine malfunction, AP reported, citing the Swedish broadcaster SVT.

"Oskarshamn’s reactor 3 is disconnected from the power grid due to a turbine shutdown. Troubleshooting is in progress," plant spokeswoman Desiree Liljevall said.

There have been no reports of radiation leaks or other potential hazards. Nord Pool, the pan-European energy exchange, said it is not known how long the Swedish reactor will be shut down, “more information will follow within 24 hours.”

Plant operator OKG said on its Web site that the reactor is one of the world's largest boiling water reactors. Construction of the plant began in 1980, and it was launched five years later.

Originally there were three reactors at the Oskarshamn nuclear power plant, but two of them were permanently shut down. It normally has a capacity of 1,400 megawatts.

Sweden, with a population of about 10 million, has two other nuclear power plants, one in Forsmark, north of Stockholm, and one in Ringhals, south of Goteborg.

Earlier this year, the restart of one of the two reactors at Ringhals was postponed until January 31 due to maintenance.