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A nuclear reactor vessel is a cylindrical structure that houses the reactor core and contains harmful radiation. It is used to refuel the reactor and access components for control systems. The vessel contains emergency core cooling systems and inlets/outlets for steam and water. It must be kept in equilibrium to avoid dangerous meltdowns. Nuclear reactors are built by commercial companies and their normal operation keeps power plants safe.
A reactor is the part of a nuclear power plant that safely houses the reactor core and contains harmful radiation. It is the heart of the reactor cooling system and consists of a vertically mounted cylindrical structure. At either end is a rounded edge called the locking head, the upper one having nuts and studs for the purpose of removing it. The reactor vessel can be opened to refuel the reactor and access components for the control systems in the instruments.
The vessel and locking head typically measure approximately 41 feet (12.5 meters) in height. General measurements include an internal diameter of 171 inches (434.3 cm), while shell wall thickness is 8.4 inches (21.3 cm). A reactor vessel consists of an assembly that includes the reactor core, core rods, and other components, such as neutron monitors, vapor separators, steam dryers, and jet pumps. The pressure vessel also contains the systems for circulating the water and the coolant.
In a nuclear power plant, a reactor also has emergency core cooling systems. These provide water to prevent overheating of the core if exposed due to rapidly decreasing water level. The center plate and top guide are used to separate components at different levels of the vessel. The fuel rods are stored at the bottom and within this section are control drives and hydraulic lines. The rods are protected during refueling by fuel channels and new fuel rods are placed into the vessel from the bottom to regulate nuclear core output.
Various inlets and outlets penetrate the reactor vessel housing. These mainly cover the need to bring steam and water in and out of the system to maintain it properly. Nuclear reactor vessels must always be kept in a state of equilibrium to function properly and to avoid dangerous meltdowns that can pollute the environment with fatal levels of radioactive material. The reactor vessel which is the single most important component to serve this purpose.
Each reactor ship can be ordered and built by commercial companies with the knowledge and skills to build these complex structures with specialized materials. There are various types, but all nuclear reactors perform the same operations. Their normal operation is what keeps nuclear power plants from becoming dangerous to people and the environment.
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