Small modular reactors (SMRs) are nuclear generating units that are about the size of railroad cars and provide about one-tenth to one-fourth the power of full-size reactors. As a result, they...
rejection as well as some dry-cooling elements, which involve blowing air over tubes as water passes through. “This requires no water,” explains Waddill. “When water is available to the system, we shut down the dry tower, because it is very energy-intensive, and use the hybrid tower to cool the unit. If we were to get into a drought situation, we would turn on the dry tower to save water.” Using this concept, Dominion would be able to reduce its cooling capacity from 28 cubic feet a second to about 19 cubic feet a second.
“I think the majority of new nuclear facilities in the future will have some type of new cooling-tower technology, because people are concerned about water availability and temperature,” adds Pam Faggert, vice president and chief environmental officer for Dominion. “It will be more common to see new sites with cooling towers than without.”