Open-pool Australian lightwater reactor

The Open-pool Australian lightwater reactor (OPAL) is a 20 megawatt (MW) swimming pool nuclear research reactor. Officially opened in April 2007, it replaced the High Flux Australian Reactor (HIFAR) as Australia's only nuclear reactor, and is located at the Australian Nuclear Science and Technology Organisation’s (ANSTO) research establishment in Lucas Heights, a suburb of Sydney, New South Wales.