High-temperature gas cooled reactor new fuel treatment system and method

Abstract

The invention provides a high-temperature gas cooled reactor new fuel treatment system and method. The treatment system comprises a new fuel treatment device, and a vacuumizing device and a helium filling device which are connected with the new fuel treatment device. The vacuumizing device is used for vacuumizing fuel balls in the new fuel treatment device before a reactor core is loaded to a first rated pressure, and keeping the first rated pressure for a first preset period of time so as to remove impurities for the first time under a vacuum condition; and the helium filling device is used for filling the new fuel treatment device with helium to reach a second rated pressure and keeping the second rated pressure for a second preset period of time so as to remove the impurities for the second time in the helium atmosphere. By arranging the vacuumizing device and the helium filling device, air, water and other impurities adsorbed by the fuel balls loaded into the reactor core can be effectively subjected to deep treatment, so that the content of impurities in a primary loop coolant in the reactor is reduced, the workload of a helium purification system is reduced, the helium purification regeneration frequency is reduced, and the generation amount of radioactive waste is reduced from the source.

Description

technical field [0001] The invention belongs to the technical field of nuclear power production, and in particular relates to a high-temperature gas-cooled reactor new fuel processing system and a high-temperature gas-cooled reactor new fuel processing method. Background technique [0002] The coolant in the primary circuit of the high-temperature gas-cooled reactor is helium, and the purity of the helium charged into the core during normal operation is required to be greater than 99.999%, so as to minimize the activation products of impurities in the primary circuit, thereby reducing the generation of radioactive waste. Dehumidification and impurity removal of reactor internals and fuel elements loaded for the first time are required during the heat test stage and after fuel loading of the high temperature gas-cooled reactor, the purpose of which is to reduce radioactive waste. [0003] The high-temperature gas-cooled reactor fuel cycle adopts the method of non-stop stackin...

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Problems solved by technology

[0004] However, in view of the above-mentioned impurities, the existing new fuel charging system of the high temperature gas-cooled reactor only considers not to bring the air outside the boundary of the primary circuit into the primary circuit system during the process of loading new fuel, and does not consider how to remove the new fuel element A large amount of water and air and other impurities adsorbed in the

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