Method for driving high-temperature liquid metal to flow circularly to cool internal components of reactor

Abstract

The invention discloses a method for driving high-temperature liquid metal to flow circularly to cool internal components of a reactor. According to the method, the liquid metal flows out of a left-side metal tank and then flows to the internal components of the reactor under the action of high-pressure (2MPa) inert argon; the high-temperature liquid metal carries out nuclear heat, then flows to a heat exchanger, exchanges heat with a secondary loop working medium, and finally flows to a left-side metal tank. When the liquid level of the liquid metal is reduced to a specified value, a control system controls an electromagnetic directional valve to switch, and the left-side metal tank and the right-side metal tank are respectively deflated and inflated to reach specified pressure. Hydraulic control one-way valves are controlled to be switched on; the liquid metal flows through the internal components of the reactor from the right-side metal tank; the high-temperature liquid metal is then subject to heat exchange and flows into the left-side metal tank. According to the invention, the high-temperature liquid metal is periodically and circularly driven to flow stably to cool the internal components of the reactor; as the system adopts the high-pressure inert gas to drive the high-temperature liquid metal to flow, the limit of using an electromagnetic pump to drive the high-temperature liquid metal is overcome and the high-temperature liquid metal in an advanced reactor can flow circularly.

Description

technical field [0001] The invention relates to a method for driving high-temperature (more than 350°C) liquid metal circulating flow to cool reactor internal components, and belongs to the field of advanced nuclear reactor thermohydraulics. Background technique [0002] Advanced reactors that choose liquid metal as coolant mainly include fusion reactors and fission reactors. At present, fusion reactors mainly use liquid lithium-lead or liquid lithium to cool the divertor and cladding; advanced fission nuclear reactors that use liquid metal as coolant include sodium-cooled fast neutron reactors developed by the fourth-generation reactor type, fluorine-lithium-beryllium fusion reactors, etc. Salt piles and accelerator-driven lead-bismuth cooled fast neutron reactors, etc. [0003] Due to the obvious advantages of high neutron yield, strong heat carrying capacity, good cooling effect, and good safety, liquid metal can quickly transfer the nuclear reaction heat in the system t...

AI Technical Summary

Problems solved by technology

This method not only needs to increase the system components and cost, but also reduces the thermoelectric conversion efficiency of the system

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