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Device and method for preparing fuel salt of molten salt reactor

A molten salt reactor and fuel salt technology, which is applied in the manufacture of reactors, reactors, and greenhouse gas reduction, etc., can solve the problem of high fuel salt cost, and achieve the effects of saving energy, saving raw material costs, and reducing raw material costs.

Active Publication Date: 2018-06-01
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the above-mentioned prior art 4 The problem of the high cost of preparing fuel salt for raw materials, the present invention aims to provide a device and method for preparing molten salt reactor fuel salt

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  • Device and method for preparing fuel salt of molten salt reactor
  • Device and method for preparing fuel salt of molten salt reactor
  • Device and method for preparing fuel salt of molten salt reactor

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preparation example Construction

[0035] The method for preparing molten salt reactor fuel salt according to a preferred embodiment of the present invention includes step S1, placing solid fluorine salt and reducing metal in the reactor 8 of the reaction system, placing the inert gas storage tank 10 of the gas supply system, The inert gas in 10' is passed into the device to remove air and water in the device. It should be understood that the solid fluorine salt can also be placed in the molten salt storage tank 16 of the molten salt supply system, and the reducing metal can be placed in the reactor 8 of the reaction system, and the inert gas storage tanks 10, 10 of the gas supply system 'The inert gas in the device is passed into the device to remove the air and water in the device. At this time, the molten salt storage tank 16 is heated by the molten salt heating furnace 15 , so that the heated and melted liquid fluorine salt is sent to the reaction kettle 8 under pressure.

[0036] The fluoride salt is a fl...

example 1

[0048] 400g solid fluoride salt LiF-BeF 2 (67-33mol%) is placed in the molten salt storage tank 16, the tank cover is covered, and the atmosphere in the molten salt storage tank is replaced with pure argon. Heating the molten salt storage tank 16 to raise the temperature from room temperature to 200°C, then keep it warm for 2 hours; replace the atmosphere in the molten salt storage tank with pure argon at the end of the heat preservation; heat the molten salt storage tank 16 again to raise the temperature from 200°C to After 400°C, keep warm for 2 hours; at the end of the keep warm, replace the atmosphere in the molten salt storage tank with pure argon to remove the water produced during the heating process. Heat the molten salt storage tank 16 again to make the temperature reach 550° C.; keep it warm for 4 hours until the fluoride salt is completely melted.

[0049] 12g of reducing metal Be flakes were placed in the reaction kettle 8, the lid of the kettle was covered, and t...

example 2

[0052] 450g solid fluorine salt KF-ZrF 4 (58-42mol%) and 68g reducing metallic nickel wire are placed in the reactor 8, the lid of the kettle is covered, and the atmosphere in the reactor is replaced with pure nitrogen. Heat the reaction kettle 8 to raise the temperature from room temperature to 200°C, then keep it warm for 2 hours; replace the atmosphere in the reaction kettle with pure nitrogen at the end of the heat preservation; heat the reaction kettle 8 again to raise the temperature from 200°C to 400°C, and keep it warm for 2 hours; At the end of the heat preservation, the atmosphere in the reactor was replaced with pure nitrogen to remove the water generated during the heating process.

[0053] Continue to heat the reactor 8 to make the temperature reach 500°C; keep it warm for 6 hours until the molten salt is completely melted. Adsorbed with UF 6 The NaF adsorption column 11' is heated to 400°C for desorption, and carried by nitrogen gas with a flow rate of 1L / min. ...

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Abstract

The invention relates to a device for preparing fuel salt of a molten salt reactor. The device comprises a gas supply system and a tail gas treatment system which are connected with a reaction system,wherein the reaction system comprises a reaction kettle containing reducing metal and a reaction heating furnace used for heating the reaction kettle; the gas supply system comprises gas supply equipment supplying inert gas and / or UF6gas into the reaction kettle; and the tail gas treatment system comprises treatment equipment for absorbing excess UF6 gas and tail gas in the reaction kettle. The invention further provides a method for preparing fuel salt of the molten salt reactor through the device. The device directly reduces UF6 in molten salt to prepare UF3 and / or UF4 to obtain fuel salt,simplifies the production process of molten salt, and has the advantages of short technical process, simple and flexible operation, no radioactive powder operation, material cost saving and energy saving.

Description

Technical field [0001] The present invention relates to the technical field of nuclear fuel preparation, and more specifically to a device and method for preparing molten salt reactor fuel salt. Background technique [0002] The molten salt reactor is the only liquid fuel reactor among the fourth generation reactors. Its main feature is the use of molten fluoride salt as the nuclear fuel carrier salt and / or coolant. In a liquid fuel molten salt reactor, the nuclear fuel is fluoride (ThF 4 ,UF 4 etc.) form is uniformly dissolved in fluoride molten salt (such as LiF-BeF 2 ), forming a flowable liquid fuel salt with no fixed geometry. This flowable fuel has many advantages such as deep fuel consumption and can be processed online. As early as the beginning of civilian nuclear energy in the last century, the Oak Ridge National Laboratory (ORNL) in the United States conducted in-depth research on molten salt reactors, and established and successfully operated the only molten s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C21/02
CPCG21C21/02Y02E30/30
Inventor 曹长青孙理鑫窦强胡聪伟黄卫牛永生王鹏周金豪林俊李晴暖
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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