Ontario Power Generation in Canada announced that Unit 1 of its Darlington nuclear power plant, which has returned to service from refurbishment, is now producing the medical isotope cobalt-60. During refurbishment activities, OPG made modifications to the unit to allow it to produce Co-60, which is used to sterilize 30 percent of the world’s single-use medical devices, such as syringes, gloves, and implants.