NIIGATA (Kyodo) A fire broke out Thursday in an underground pump cabin that cools the No. 1 reactor at the Kashiwazaki-Kariwa nuclear plant in Niigata Prefecture, leaving a worker with minor facial burns, firefighters said.

There was no radioactive leak from the reactor, which has been suspended along with the six others at the plant since it was struck by a major earthquake in July 2007, operator Tokyo Electric Power Co. said.

The fire, the eighth during checkups carried out since the suspension, was extinguished about 30 minutes after it started shortly before 9 a.m., the firefighters said.