About 300 liters of radioactive heavy water spilled at New Brunswick Power's Point Lepreau plant on Monday, making it the second spill at the site in less than six months.
"Unfortunately, the amount of water was greater than what we expected and overflowed to the floor and the test was ceased immediately," he said in an interview Thursday.
In December, a similar event occurred when four to six liters of radioactive heavy water spilled because of a leak at the plant. However, the company was quick to distinguish a difference between the two accidents.
"This event is fundamentally different than the event that occurred in December 2011," New Brunswick Power said in a statement. "There were no requirements to evacuate the reactor building as the spill occurred in a room that was designed to contain and collect heavy water."