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Method of Transmutation of Transuranic Elements in Liquid Molten Salt Reactor

A technology for transuranic element and molten salt reactor, which is applied in the field of nuclear reactor engineering design, can solve the problems of high economic cost, high technical difficulty, low transmutation rate, etc., and achieves the effects of reducing reserves, high achievability, and reducing the difficulty of post-processing

Active Publication Date: 2021-05-18
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the problems of low transmutation rate, high technical difficulty and high economic cost in recycling and utilizing transuranic elements in the prior art, thereby providing a method for transmutation of transuranic elements in a liquid molten salt reactor , the method is simple and feasible, and achieves a higher transmutation rate of transuranic elements

Method used

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  • Method of Transmutation of Transuranic Elements in Liquid Molten Salt Reactor
  • Method of Transmutation of Transuranic Elements in Liquid Molten Salt Reactor
  • Method of Transmutation of Transuranic Elements in Liquid Molten Salt Reactor

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Embodiment 1

[0035] will be provided by TRUF 3 The molten salt composed of base salt is filled in the channel 31 of the graphite moderator component 3, TRUF 3 The initial molar percentage of the molten salt is 0.045%, and the volume ratio of the molten salt to the graphite moderator component 3 is 5%. Start the liquid molten salt reactor. During the operation, the fission gas is removed by blowing through the bubbling system. The blowing cycle is 30s, and the blowing efficiency is 100%. Add TRUF online 3 Maintain reactor criticality at 1. After the liquid molten salt reactor has been in operation for 24 years, the reactor is shut down, the molten salt is transferred to the reprocessing equipment, and the soluble fission products are separated by reduction extraction technology. At this time, the transmutation rate of transuranium elements takes the maximum value of 51.9%, TRUF 3 The molar percentage of the total amount of molten salt is 0.49%. Among them, the calculation method of the ...

Embodiment 2

[0037] TRUF 3 The initial molar percentage of the molten salt is 0.0271%, and the volume ratio of the molten salt to the graphite moderator component 3 is 10%. Other conditions are with embodiment 1. When the liquid molten salt reactor has been in operation for 15 years, the transmutation rate of transuranium elements takes a maximum value of 52.2%. At this time, TRUF 3 The molar percentage of the total amount of molten salt is 0.579%.

Embodiment 3

[0039] TRUF 3 The initial mole percentage of the molten salt is 0.0208%, and the volume ratio of the molten salt to the graphite moderator component 3 is 15%. Other conditions are with embodiment 1. When the liquid molten salt reactor has been in operation for 9.7 years, the transmutation rate of transuranium elements takes a maximum value of 50.9%. At this time, TRUF 3 The molar percentage of the total amount of molten salt is 0.384%.

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Abstract

The invention discloses a method for transmutation of transuranium elements in a liquid molten salt reactor. The liquid molten salt reactor is a graphite-moderated channel-type liquid molten salt reactor, and graphite moderator components containing channels are arranged inside the reactor core. The method The method comprises the following steps: (1) filling the channel of the graphite moderator component with a molten salt composed of a transuranic element fluorine salt and a base salt, the initial molar percentage of the transuranic element fluorine salt in the molten salt being 0.01 % to 0.1%, the volume ratio of the molten salt to the graphite moderator component is 5% to 40%; (2) adding the transuranic element fluorine salt online during operation. The method is simple and feasible, and achieves a higher transmutation rate of transuranic elements.

Description

technical field [0001] The invention belongs to the field of nuclear reactor engineering design, in particular to a method for transmutation of transuranic elements in a liquid molten salt reactor. Background technique [0002] The current commercial reactor fuel cycle adopts the "one-off" circulation method and solid-state fuel assemblies. The fuel utilization rate is low, and the high content of highly radioactive transuranium elements (TRU) in the spent fuel is a major problem facing the development of nuclear energy. Recycling transuranic elements is one of the effective ways to reduce the current nuclear waste storage and realize the sustainable development of nuclear energy. At present, transuranic elements are mainly recycled and utilized in solid-state reactors, but solid-state reactors need to prepare transuranic elements into solid fuel elements, which is technically difficult and economically costly, and the amount of transuranium elements that can be transmuted i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21G1/02
CPCG21G1/02
Inventor 邹春燕邹杨陈金根朱贵凤郭威
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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