Pool-type reactor
（重定向自Pool reactor）
![NC State's PULSTAR Reactor is a 1 MW pool-type research reactor with 4% enriched, pin-type fuel consisting of UO2 pellets in zircaloy cladding.](/Images/godic/202502/03/Pulstar22325.jpg")
![The control room of NC State's Pulstar Nuclear Reactor.](/Images/godic/202502/03/Pulstar12325.jpg")
Pool-type reactors, also called swimming pool reactors, are a type of nuclear reactor that has a core (consisting of the fuel elements and the control rods) immersed in an open pool of usually water. Some sodium-cooled reactors like the BN-600 have sodium pools instead. The rest of this article will assume that water is being used.