Upper reactor internal suitable for floating type reactor

Abstract

The invention discloses an upper reactor internal suitable for a floating type reactor, and relates to the field of marine nuclear power facilities. The upper reactor internal comprises a support cylinder, a guide cylinder and an accelerating energy storage device, wherein a horizontally arranged fixed bearing plate is fixedly arranged on the top of the support cylinder; the fixed bearing plate isprovided with a through hole, and reactor control rod assemblies can pass through the through hole; the guide cylinder is arranged in the support cylinder, and one end of the guide cylinder is embedded in the through hole of the fixed bearing plate; the accelerating energy storage device is arranged on the top of the fixed bearing plate and is used for providing additional kinetic energy for thereactor control rod assemblies when rod drop is performed by the reactor control rod assemblies. The upper reactor internal suitable for the floating type reactor comprises the accelerating energy storage device; the accelerating energy storage device is arranged in the upper reactor internal in a reactor pressure vessel, so that the accelerating energy storage function of the control rod assemblies in the reactor pressure vessel can be realized, and accelerated rod drop of the control rod assemblies of the floating type reactor is further realized under the marine environment conditions.

Description

technical field [0001] The invention relates to the field of marine nuclear power devices, in particular to an upper internal component suitable for a floating reactor. Background technique [0002] The reactor internals are located in the reactor pressure vessel and provide flow channels for the coolant in the pressure vessel, and are mainly divided into upper reactor internals and bottom reactor internals. Among them, the upper internals mainly provide protection and reliable guidance for the control rod assembly; the bottom internals mainly provide reliable support and positioning for the fuel assembly and its related components, and shield neutrons and gamma rays. When a reactor emergency occurs, it is necessary to make the control rod assembly fall into the reactor core to control the shutdown, so as to ensure the safety of the reactor. [0003] Due to the special operating environment of floating reactors, the whole reactor has been in the ocean environment of tilting...

AI Technical Summary

Problems solved by technology

[0004] In the structural design of floating reactors at home and abroad, most of the acceleration energy storage devices are installed outside the reactor pressure vessel, and are used in the control rod drive mechanism to drive the control rod assembly up and down. It is necessary to dismantle the control rod driving mechanism one by one in the process. Therefore, higher technological requirements are put forward for the control rod driving mechanism, and the operation time of reactor loading and unloading is significantly increased, and the economic benefits of the nuclear power plant are reduced.

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