Reserve cooling towers recently installed at the Finnish nuclear power plant Loviisa on the island of Hästholmen complement the main cooling system for the two 496 MW reactors. The cooling towers were built by GEA EGI Contracting/Engineering Co. Ltd., a member of the GEA Heat Exchangers Group, and were erected under the supervision of Fortum, the customer and plant operator.
The standby cooling towers serve as backups to the main plant cooling. If the seawater cooling systems become unavailable — for example, if an oil slick occurs in the plant vicinity — the standby towers will remove the residual heat from the plant into the air and allow the plant to be shut down safely. While plant operator Fortum had already prepared plans for a standby cooling system, the company implemented the standby cooling tower following post-Fukushima stress tests.