ReactorSystem used to initiate, maintain and control a fission chai... in which fuelSee 'nuclear fuel'. elements are submerged in an open water pool. The water serves as a moderatorMaterial used to "decelerate" fast neutrons to low energies,..., reflectorMaterial layer immediately around the core of a nuclear reac... and coolantAny substance used to remove the heat in a nuclear reactor. .... This reactorSystem used to initiate, maintain and control a fission chai... type is used for research and training purposes. The FRG-1Research reactor of the Research Centre Jülich; swimming po... research reactorA nuclear reactor designed mainly for generation of high ... of the GKSS in Geesthacht, Germany is a pool reactorSystem used to initiate, maintain and control a fission chai....