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The RBMK-2000 would have had an increased channel diameter and number of fuel rods per fuel assembly while maintaining the same dimensions of the reactor core as the RBMK-1000 and RBMK-1500. The RBMK-3600 presumably similarly to the RBMK-1500 would have added turbulators to the RBMK-2000 design to increase heat removal.
RBMK reactor fuel was used in Soviet-designed and built RBMK-type reactors. This is a low-enriched uranium oxide fuel. The fuel elements in an RBMK are 3 m long each, and two of these sit back-to-back on each fuel channel, pressure tube. Reprocessed uranium from Russian VVER reactor spent fuel is used to fabricate RBMK fuel.
Fuel is changed using a remote-controlled crane and spent fuel rods would spend up to five years in a cooling pond located in the reactor hall before further processing. The continuous refuelling cycle brings a fuel burnup benefit; individual rods can be left longer in the reactor instead of being swapped en masse as required in most PWR designs.
Control rod assembly for a pressurized water reactor, above fuel element Control rods are used in nuclear reactors to control the rate of fission of the nuclear fuel – uranium or plutonium . Their compositions include chemical elements such as boron , cadmium , silver , hafnium , or indium , that are capable of absorbing many neutrons without ...
On the other hand, if a reactor is designed to operate with no voids at all, a large negative void coefficient may serve as a safety system. A loss of coolant in such a reactor decreases the thermal output, but of course heat that is generated is no longer removed, so the temperature could rise (if all other safety systems simultaneously failed).
The planned small modular reactors will use the Xe-100 design, a high-temperature gas-cooled reactor developed by X-energy, a global leader in advanced nuclear reactor and fuel technology.
Chernobyl Reactors 5 and 6 are unbuilt reactors, a part of Chernobyl Nuclear Power Plant's third generation phase. Intended as RBMK-1000 units capable of approximately 1,000 megawatts each, construction began on 1 July 1981 and was partially completed by the time of the Chernobyl disaster on 26 April 1986.
Reactor fuel rods are fully immersed in water kept at (12,5 / 15,7 / 16,2 ) MPa (1812/2277/2349 psi) pressure respectively so that it does not boil at the normal (220 to over 320 °C [428 to >608°F]) operating temperatures. Water in the reactor serves both as a coolant and a moderator which is an important safety feature.