A worker at a security building outside of a nuclear power plant north of Omaha was badly burned while refilling a gas tank for a portable pump. The Omaha Public Power District says the pump caught fireThursday, and the unidentified worker suffered burns to his armsand face while putting out the blaze. Emergency personnel of the Fort Calhoun Station took him outsidethe plant to a medical helicopter, which transported him to a burncenter in Lincoln. The power district says the security building isn’t part of the nuclear plant and is surrounded by a sand-filled barrier to keep water out. Officials say the nuclear plant was not in danger, though theNuclear Regulatory Commission has been notified of the incident. The worker’s name is being withheld pending notification of hisfamily.