Actual Operation Control of Boiling Water Reactor
The boiling water reactor (BWR) is divided into two main systems: the nuclear steam supply system (NSSS) that generates steam, and the turbine system (or turbine island) that uses the stream to rotate turbo-generator and generate electric power. The NSSS consists of various subsystems and equipments. They include basically the reactor pressure vessel that houses fuel, control rods, and other nuclear reactor equipments, a reactor auxiliary system that handles circulation of coolant, generated steam, and feed water returned from turbines, the engineered safety features that are required for securing safety, and a reactor auxiliary system that is required for operating the plant. The fuel handling and storage equipment, the instrumentation and control system, and the electrical system, as well as the radioactive waste treatment system that is unique to nuclear power station are also included in the NSSS. The turbine system consists mainly of turbines, generators, the condenser that condenses steam, the feed-water system that resupplies the reactor with the condensate. Figure 7.1 shows the overview configuration of BWR systems.
KeywordsReactor Power Reactor Pressure Reactor Pressure Vessel Excess Reactivity Main Steam
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