LEPREAU, N.B. - Radioactive heavy water spilled Tuesday evening at the Point Lepreau nuclear power plant in New Brunswick.
Kathleen Duguay, a spokeswoman for NB Power, said the spill occurred in the reactor building.
She didn't know the exact amount, but said it was "minute."
"It was a small spill. It was all cleaned up immediately," she said.
Duguay said no one was hurt.
The spill occurred as the reactor's moderator system was being filled with heavy water as part of NB Power's plan to restart the generating station, which has been undergoing a lengthy and expensive refit.
Duguay said the spill was detected by radiation monitoring equipment and the reactor building was evacuated immediately.
She said workers in the area were wearing protective suits at the time and were not exposed.
The cause of the accident wasn't known.