Safe cooling device for molten salt

Abstract

The invention provides a safe cooling device for molten salt. According to the invention, an integrated crucible cover is placed on a crucible; a sealing gasket is arranged between the integrated crucible cover and the crucible; the integrated crucible cover comprises an inner baffle plate, an outer baffle plate, an outer heat exchange element welding hole and a salt inlet hole; an outer heat exchange element is welded on the integrated crucible cover and vertically inserted into the crucible; the upper part of the inner heat exchange element is connected with a water tank, and the lower partof the inner heat exchange element is inserted into the outer heat exchange element; and a water tank communicates with the atmosphere. The safe cooling device of the invention adopts the integrated crucible cover with the baffle plate and a drainage pipeline and employs a double-layer heat exchange element structure, so the safe cooling device can effectively reduce the risk of explosion caused by direct contact between cooling water and high-temperature molten salt due to partial damage of the heat exchange elements in an accident, greatly improves the safety factor of a system, ensures thesafe cooling of the molten salt, and meets the design requirements of passive safety system. The safe cooling device operates at atmospheric pressure, has low requirements on pressure resistance, reduces designing and manufacturing cost, and is reasonable in design, ingenious in structure, simple and practical to use, easy to assemble and mature in technology.

Description

technical field [0001] The invention relates to a safety cooling device for molten salt, which belongs to the technical field of reactor passive waste heat discharge. Background technique [0002] At the International Forum on Generation IV Nuclear Energy Systems held in Tokyo from September 19 to 20, 2002, the 10 participating countries agreed to develop the following six concept reactor systems for Generation IV nuclear power plants on the basis of 94 concept reactors : Sodium-cooled fast reactor, lead-cooled fast reactor, gas-cooled fast reactor, supercritical water reactor, ultra-high temperature gas-cooled reactor and molten salt reactor. The so-called molten salt means that the nuclear fuel exists in the reactor in liquid form. Among the fourth-generation reactors, the molten salt reactor changed the way of thinking about the physical design of the core and is the only reactor that uses liquid fuel. This liquid is a low-melting eutectic formed by combining certain fl...

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Problems solved by technology

[0004] Patent 201310286718.7 discloses a passive waste heat removal system for molten salt reactors. Its function is to improve the passive working capacity of the system, but its disadvantage is that the system design is too complicated, and there are many valves and water tanks in the system. The failure of a certain component in the system may cause the system to fail to operate normally, so it is necessary to design a system structure with simple structure and strong reliability

[0005] Patent 201610899803.4 discloses a single-tube experimental device for passive waste heat discharge of molten salt reactors. Its function is to provide an experimental device that is more suitable for experimental research. The disadvantage is that it uses a tube-type electric furnace as a heat source, which is different from engineering practice There is a big difference in molten salt as a heat source. The system design does not consider the safety issues that need to be paid attention to when using molten salt as a heat source. There are potential safety hazards. Therefore, it is necessary to design a safe cooling system that can be applied to actual molten salt.

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