Passive residual heat removal system for underwater nuclear power unmanned underwater vehicle

Abstract

The invention discloses a passive residual heat removal system for an undersea nuclear power unmanned underwater vehicle. The passive residual heat removal system comprises heat insulation pieces and a residual heat removal cavity. The heat insulation pieces sleeve the outer surfaces of heat pipes in a heat pipe bundle of a reactor. The waste heat removal cavity sleeves the periphery of the heat pipe bundle, an outlet and an inlet are respectively arranged in the top and bottom of the waste heat removal cavity, a lower valve is arranged at the inlet, and an upper valve is arranged at the outlet. According to the passive residual heat removal system for the underwater nuclear power unmanned underwater vehicle disclosed by the invention, the residual heat of the reactor core can be continuously removed without an external power supply for providing electric power, and the residual heat removal system is simple and reliable in structure, has inherent safety and can be used as a residual heat removal system of an underwater nuclear power device with limited space.

Description

technical field [0001] The invention belongs to the field of nuclear energy, and in particular relates to a passive waste heat discharge system of an unmanned underwater vehicle. Background technique [0002] Due to the advantages of high energy density, long life, and air independence, nuclear-powered unmanned submersibles are ideal power devices for deep-sea development equipment. Nuclear reactors are generally used to provide power for underwater nuclear-powered unmanned submersibles. [0003] The removal of waste heat from nuclear reactor is an important issue to ensure the safety of the reactor. When the reactor has a heat sink loss accident, the reactor must be shut down, and the waste heat removal system must be turned on to discharge the decay waste heat to ensure that the reactor core is not damaged. However, it is difficult for the reactor to continue to discharge the decay waste heat after the heat sink loss accident occurs. , mainly reflected in: 1. Since the ex...

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Problems solved by technology

The waste heat removal system of traditional nuclear power plants relies heavily on external power. When the external power is lost, it cannot cool and take away the waste heat of the core, causing nuclear safety accidents, such as the Fukushima nuclear accident

[0005] The new third-generation nuclear power plant adopts a passive waste heat removal system. The passive waste heat removal system needs to overcome the flow pressure drop in the reactor primary circuit, secondary circuit and cooling water circuit to form a cycle, and transfer heat to the final heat sink step by step. Although this This waste heat removal system adopts natural circulation and does not rely on external power. However, the waste heat removal system has a complex structure, large volume, and difficult operation and maintenance. It is not suitable for the small and precious space of underwater unmanned submersibles.

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