A leak of heavy water at the Point Lepreau nuclear generating station last week required three plant employees to enter the reactor building to fix the problem manually, according to new information about the incident released by N.B. Power. In response to a series of questions about the heavy water spill, N.B. Power's Dominique Couture said in a statement "three authorized and qualified staff" were outfitted to enter the reactor containment building where an unknown amount of heavy water was escaping from a tube about half the width of a household garden hose.