Collective term for all H2O moderated and cooled reactors; See ‘boiling water reactor’, ‘pressurized water reactor’ (H2O = “light” water, in contrast to D2O = “heavy” water). The light water reactorSystem used to initiate, maintain and control a fission chai... produces heat by controlled nuclear fissionFission of an atomic nucleus into two parts of the same size.... The reactorSystem used to initiate, maintain and control a fission chai... corePart of the nuclear reactor where the fission chain reaction... consisting of fuelSee 'nuclear fuel'. and control elements is enclosed by a water-filled steel pressure vesselThick-walled cylindrical steel vessel enclosing the reactor .... The heat generated by the fissionSee 'nuclear fission'. heats the water which evaporates in the pressure vesselThick-walled cylindrical steel vessel enclosing the reactor ... in a boiling water reactorNuclear reactor with water as a coolant and as a moderator, ... but, in the pressurized water reactorPower reactor in which the heat is dissipated from the core ..., the steam evaporates in a steam generator of a secondary circuit. The steam energyAbility to do work or diffuse heat. The unit of energy is th... is converted into rotary motion of the turbine to which a generator for the generation of electricity is connected. After flowing through the turbine, the steam condenses into water in the condenser and is recirculated to the pressure vesselThick-walled cylindrical steel vessel enclosing the reactor ... or steam generator. The water required to cool the condenser is taken from a river and refed into the river in warmed condition or the heat is dissipated via a cooling towerTower-like concrete construction for closed-circuit cooling.... into the atmosphere.