12/24/2023 0 Comments Nuclear power factorioSometimes a reactor can be shut down only to Hot Standby mode, which means the operating temperature is normally maintained. In general, a reactor can be shut down for many reasons. Generally, reactor coolant pumps are powerful, they can consume up to 6 MW each, and therefore, they can be used for heating the primary coolant before a reactor startup. Most of PWRs use four RCPs in two or four loops design. This article is focused on RCPs for pressurized water reactors. There are significant differences between pumps for different reactor types. There are many designs of these pumps, and there are many designs of primary coolant loops. The purpose of the reactor coolant pump is to provide forced primary coolant flow to remove and transfer the amount of heat generated in the reactor core. Reactor coolant pumps (RCPs) are used to pump primary coolant around the primary circuit. However, natural circulation is insufficient to remove the heat generated when the reactor is at power. Sufficient and safe residual heat removal is then ensured by a natural circulation flow through the reactor. After the loss of RCPs, the reactor must be shut down immediately. RCPs are not usually “safety systems”, as defined. The cooling water is usually supplied by two or more large centrifugal pumps called reactor coolant pumps (RCPs). Because of the large amount of heat generated in the reactor core by the fission reaction, the cooling systems demand a large volumetric flow of water (~80000 m3/hr) to ensure a sufficient and safe heat transfer. Cooling systems naturally ensure a heat transfer from a reactor core to steam generators, which is the main purpose of the cooling systems. Nuclear power plants rely on cooling systems to ensure the safe, continuous operation of the nuclear reactor.
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