Steam generators are heat exchangers used to convert feedwater into steam from heat produced in a nuclear reactor core.The steam produced drives the turbine. This form of light water nuclear reactor Boiling-Water Reactor . Natural convection boiling water reactors limit complexity by dispensing with the need for pumping water within the reactor vessel. Boiling water reactor (BWR) — water is boiled in the pressure vessel and the steam is used directly to turn the turbine. A PWR generates steam indirectly by using two water circuits, a primary one and a secondary one. In the boiling water reactor, steam produced in the reactor is passed directly to the turbine. Thus the steam can be directly fed to the turbine without utilizing an intermediate heat exchanger. a nuclear reactor in which the core is cooled by a boiling coolant, usually water. E. In a boiling water reactor, steam is produced outside the reactor core. In typical PWR designs, the primary coolant is high-purity water, kept under high pressure so it cannot boil. C. In a pressure water reactor, only the turbine is exposed to radiation during electricity production. Boiling - Boiling Characteristics Steam generators are heat exchangers used to convert water into steam from heat produced in a nuclear reactor core.They are used in pressurized water reactors (PWR) between the primary and secondary coolant loops.. On the other hand, the coolant (water) is allowed to boil (or change its phase from water to steam) in the Boiling Water Reactor (BWR). D. In a boiling water reactor, the water heated by fuel rods is never exposed to the turbine. Boiling is the phase change from the liquid to the vapor state and it occurs when a liquid is heated to its boiling point. After expansion and condensation, the water is returned to the reactor via a series of feedwater heaters which preheat the feedwater be fore it is returned to the reactor. Boiling Water Reactor Intro On the Main Steam System in The BWR A boiling water reactor (BWR) is a kind of Light water nuclear reactor mainly used to generate electric power. Nuclear Power-> Nuclear Power Plant-> Steam Generator. In a boiling water reactor, heat generated by a radioactive core can be used to boil water to produce steam, which in turn can be used to drive a turbine to generate electricity. B. On the other hand, a BWR produces steam directly using a single water circuit. The main difference between the PWR and BWR lies in the process of steam generation. Boiling Water Reactor (BWR) Steam produced in Boiling Water Reactor (BWR) under normal operations could contain small traces of radio activity as steam is produced in the Reactor Pressure Vessel (RPV). Boiling-water reactors may be used in single-loop schemes of atomic power plants, in which steam produced in the reactor is conducted directly to a turbine. 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