ONCE-THROUGH COOLING WATER

Water (fresh or saline) that is withdrawn from a river, stream or other water body (man-made or natural), or a well, that is passed through a steam condenser one time, and then returned to the stream or water body some distance from the intake. Once-through cooling water is used to exchange the heat from the steam condensers commonly used in power production plants to the cooler water. Typically, such waters are required to be cooled in cooling ponds before returning to a stream or other body of water. Also referred to as Open-Cycle Cooling.