In the PWR-type nuclear power plants, the primary cooling system water into the reactor pressure ve

The difference in the workings of a steam power plant (power tripod fluid head plant) with a nuclear tripod fluid head power plant (NPP) is shown in the Figure below the plant, in the steam boilers tripod fluid head (boilers) oil or coal is burned to generate steam at high temperature and pressure, then this steam channeled to a turbine tripod fluid head to generate electricity. In terms of power generation, tripod fluid head power plant and nuclear power plants have the same principles. The heat produced is used to generate steam and then the steam is channeled to a turbine to generate electricity. Different from the two types of power plants are generating the steam engine, which is a form of boiler and the other being a nuclear tripod fluid head reactor. In a nuclear reactor nuclear power plant, the fission chain reaction is maintained continuity in the fuel so that the fuel becomes heat. This heat is then transferred to the reactor coolant which then directly or indirectly used to generate steam. Direct steam generation is done by making the reactor coolant (usually ordinary water, tripod fluid head H2O) boils and produces steam. In indirect tripod fluid head steam generation, cooling the reactor (called the primary coolant) which receives heat from the fuel piped to the steam generator. This then gives the primary coolant heat (medium tripod fluid head penetrates tripod fluid head the pipe wall) to a secondary coolant (water) pipes that are outside the steam generator to heat then the secondary coolant tripod fluid head to boil and generate steam.
Several types of nuclear reactors tripod fluid head as well as moderator and coolant types of materials used are shown in the table below is generally the type of nuclear reactor in a nuclear power plant distinguished by the composition and construction tripod fluid head of a neutron moderator materials and coolants used so used designations tripod fluid head such as gas reactors, light water reactors, reactor heavy water (light water: H2O; heavy water: D2O; D is one of the isotopes of hydrogen, deuterium 2H1). In addition, the cooling water conditions also factor into consideration the classification of types of nuclear reactors in nuclear power plants. If the cooling water in a boiling condition called boiling water reactor, if not boiling (or not allowed to boil, with just enough pressure on cooling) is called pressurized water reactor. Nuclear reactor coolant temperature tripod fluid head is very high (above 800 C) is called a high temperature gas reactor. The average speed of neutrons produced in the reactor fission is also used to classify the type of reactor. Based on the average speed of the neutrons in the core, there is a fast reactor and thermal reactor (neutrons with relatively slow speed is often referred to as thermal neutrons).
Among the nuclear tripod fluid head plants still operating in the world, 80% is the Light Water Reactor tripod fluid head nuclear power plant type (LWR). This reactor was originally designed for submarine propulsion States Navy. With enough modification and improvement of the power required is then used in nuclear tripod fluid head power plants. Nuclear power plant of this type with the greatest power is still operating at this time (2003) is the Chooz nuclear power plant and Civaux in France tripod fluid head that has power 1500 MWe, of the class of N-4 French. Light Water Reactor can be divided into two groups, namely Boiling Water Reactor and Pressurized Water Reactor (not boiling coolant), the second group uses light water as a coolant and moderator.
In type light water reactors use uranium as a fuel with a low enrichment of about 2% - 4%; instead of natural uranium because of the nature of water which absorbs neutrons. The ability of water to moderate neutrons (lower velocity / energy neutrons) is very good, so if it is used in the reactor (as a neutron moderator and coolant) the size of the reactor core becomes smaller (compact) when compared with gas reactor type nuclear reactors and heavy water reactors.
In the PWR-type nuclear power plants, the primary cooling system water into the reactor pressure vessel at high pressure and temperature of approximately 290 oC. Water pressure and temperature of this move on the sidelines of the fuel rods in the fuel assembly toward the top terrace while taking the heat from the fuel rods, so the temperature rose to about 320 oC. Primary cooling water is then channeled to a steam generating device (through the pipe on the side of the steam generator), this device provides the primary cooling water heat energy to the secondary tripod fluid head cooling water (which is on the outside of the steam generator pipe) so that the temperature rises to the boiling point and evaporation. Steam generated from the evaporation of secondary cooling water is then sent to a turbine to turn a turbine which is coupled to an electric generator. Turnover electricity generator will produce electrical energy supplied to the grid. Primary coolant water in the reactor vessel with the temperature of 320 C will boil if it is at normal air pressure (about one atmosphere). In order for the primary coolant tripod fluid head is not boiling, then the system pe