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 System used to initiate, maintain and control a fission chai... produces heat by controlled Fission of an atomic nucleus into two parts of the same size.... The System used to initiate, maintain and control a fission chai... Part of the nuclear reactor where the fission chain reaction... consisting of See 'nuclear fuel'. and control elements is enclosed by a water-filled steel Thick-walled cylindrical steel vessel enclosing the reactor .... The heat generated by the See 'nuclear fission'. heats the water which evaporates in the Thick-walled cylindrical steel vessel enclosing the reactor ... in a Nuclear reactor with water as a coolant and as a moderator, ... but, in the Power reactor in which the heat is dissipated from the core ..., the steam evaporates in a steam generator of a secondary circuit. The steam Ability 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 Thick-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 Tower-like concrete construction for closed-circuit cooling.... into the atmosphere.