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A core shroud is a stainless steel cylinder surrounding a nuclear reactor core whose main function is to direct the cooling water flow. [1] The nuclear reactor core is where the nuclear reactions take place. Because the reactions are exothermic, cool water is needed to prevent the reactor core from melting down. The core shroud helps by ...
Units 1 through 4 at the plant. At the time of the earthquake, Unit 4 had been shut down for shroud replacement and refueling since 29 November 2010. [1] [2] All 548 fuel assemblies had been transferred in December 2010 from the reactor to the spent fuel pool on an upper floor of the reactor building [3] where they were held in racks containing boron to damp down any nuclear reaction. [4]
Containment systems for nuclear power reactors are distinguished by size, shape, materials used, and suppression systems. The kind of containment used is determined by the type of reactor, generation of the reactor, and the specific plant needs. Suppression systems are critical to safety analysis and greatly affect the size of containment.
The relative lack of water available for cooling pressurized water reactors west of the Hu line (shaded yellow) is seen as a limiting factor for them. cf. Map of Chinese nuclear power plants. A small modular reactor (SMR) based on the LF1, as well as a fuel salt
The Nuclear Regulatory Commission defines two emergency planning zones around nuclear power plants: a plume exposure pathway zone with a radius of 10 miles (16 km), concerned primarily with exposure to, and inhalation of, airborne radioactive contamination, and an ingestion pathway zone of about 50 miles (80 km), concerned primarily with ...
Major concerns about the safety of the reactor arose from the formation of cracks in the core shroud inside the reactor vessel since the 1990s. This is due to steel corrosion by the coolant. In spite of reinforcements of the shell, and chemical additives in the coolant, the cracks were increasing in length year after year.
The United States is the largest producer of nuclear power, while France has the largest share of electricity generated by nuclear power, at about 70%. [3] Some countries operated nuclear reactors in the past but have no operating nuclear power plants at present.
Entrance to the Radiation Center. The Oregon State University Radiation Center (OSURC) is a research facility that houses a nuclear reactor, Gammacell 200 irradiator, several radiation laboratories, and multiple high-bay thermal hydraulics laboratories at Oregon State University (OSU) in Corvallis, Oregon, United States.