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Microwave denitration device

A microwave and denitration technology, used in reactor fuel elements, inorganic chemistry, nuclear power generation, etc., can solve problems such as loss of nuclear materials, dilute solutions, complex processes and equipment, and achieve the effect of small waste and simple operation.

Inactive Publication Date: 2021-06-01
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
  • Description
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Problems solved by technology

[0004] However, this process also has the following disadvantages: the process and equipment are more complicated, more dilute solutions are produced, resulting in the loss of nuclear materials, and the waste liquid treatment is difficult

Method used

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  • Microwave denitration device

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Embodiment 1

[0028] Such as figure 1 As shown, a microwave denitrification device is used to convert neptunium / plutonium nitrate solution into neptunium / plutonium oxide powder; the device consists of a microwave generator, a microwave transmission line, a control system, a radioactive sealed chamber, and a microwave cavity and material containers.

[0029] The microwave generator, microwave transmission line, and control system are located outside the radioactive sealed chamber (non-radioactive area); the microwave cavity and the material container are located inside the radioactive sealed chamber (radioactive area); the material container is located in the microwave cavity Inside, the material container is a crucible, which is used to hold the neptunium / plutonium nitrate solution. The material container is the main place where the denitration reaction occurs. The neptunium / plutonium nitrate solution is gradually converted into oxides by microwave heating. The material of the microwave ca...

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Abstract

The invention discloses a microwave denitration device. The device is used for converting a neptunium nitrate / plutonium nitrate solution into neptunium oxide / plutonium oxide powder. The device is composed of a microwave generator, a microwave transmission line, a control system, a radioactive sealing box chamber, a microwave cavity and a material container. According to the device provided by the invention, microwave heating is used for concentrating and solidifying a tail end product solution in the nuclear fuel post-treatment process, so that the spent fuel post-treatment process is simplified.

Description

technical field [0001] The invention relates to the field of spent fuel reprocessing, in particular to a microwave denitrification device. Background technique [0002] During the reprocessing of spent fuel, it is usually necessary to convert neptunium nitrate or plutonium nitrate from a nitrate solution state to an oxide solid state that is easy to transport and store for subsequent processes. For the batch or continuous operation of neptunium and plutonium tail-end technology, the technical route commonly used abroad and in my country is the process of precipitation and calcination of neptunium oxalate and plutonium, which mainly includes the following procedures: 1) Preparation of precipitation liquid (valence state adjustment 2) Neptunium oxalate and plutonium precipitation; 3) Neptunium oxalate and plutonium filtration; 4) Neptunium oxalate and plutonium drying and roasting; 5) Neptunium dioxide and plutonium product pouring, weighing and packaging; 6) Oxalic acid Treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G56/00G21C19/42
CPCC01G56/005C01G56/008G21C19/42Y02E30/30
Inventor 何辉刘协春刘占元申震唐洪彬李斌叶国安常尚文李峰峰蒋德祥郭建华
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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