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plutonium dioxide raw material pretreatment device for mox

A pretreatment device, plutonium dioxide technology, applied in the field of pretreatment, can solve the problems of not meeting the pretreatment requirements of radioactive materials, atmosphere and temperature control, exhaust gas treatment and insufficient consideration of radiation protection, etc.

Active Publication Date: 2021-12-17
THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional calcination furnaces can only be used in non-radioactive fields, and do not fully consider issues such as atmosphere and temperature control, tail gas treatment, and radiation protection, and do not meet the requirements for pretreatment of radioactive materials

Method used

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  • plutonium dioxide raw material pretreatment device for mox
  • plutonium dioxide raw material pretreatment device for mox
  • plutonium dioxide raw material pretreatment device for mox

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Embodiment Construction

[0023] A plutonium dioxide pretreatment device for MOX, such as image 3 As shown, the resistance furnace body consists of electric heating element 1, refractory material 2, heat preservation material 3, furnace shell 12, and cooling water jacket 4 from the inside to the outside; the furnace shell 12 is made of a 5mm thick ordinary steel plate as a fixing and furnace support structure The electric heating element 1 adopts a nickel-chromium electric heating element, the material model is Cr20Ni80, which is a spiral mechanism, and is fixed around the furnace cavity of the resistance furnace through the bricks fixed on the refractory material 2, and the electrode of the electric heating element 1 is placed on the furnace body. The electrodes are connected by quick plug-in, and the electric heating element can be quickly lifted and placed by the sling for easy replacement.

[0024] Such as figure 1 As shown, the refractory material 2 is clay bricks, and the thermal insulation mat...

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Abstract

A plutonium dioxide pretreatment device for MOX, including a resistance furnace body, the resistance furnace body is respectively an electric heating element, a refractory material, an insulating material, a furnace shell, and a cooling water jacket from the inside to the outside; the electric heating element is fixed on the refractory material through The bricks are fixed around the furnace cavity of the resistance furnace, and the electrodes of the electric heating element are placed above the furnace body; the refractory and heat preservation materials are used to fix the earth bricks as a whole through a stainless steel frame, and there are hooks on it; the furnace cover of the resistance furnace is located on the upper part of the resistance furnace body , the resistance furnace cover is connected to the storage platform through a rope, and a movable quartz boat is placed on the storage platform to place pretreated raw materials. The storage platform can be lifted and lowered with the resistance furnace cover; , used to pass dry air; the resistance furnace cover is welded with stainless steel cooling water pipes; the armored thermocouple penetrates into the furnace body through the hole on the resistance furnace cover.

Description

technical field [0001] The invention belongs to the field of pretreatment, in particular to a plutonium dioxide raw material pretreatment device for MOX. Background technique [0002] Plutonium dioxide powder is an important raw material for MOX fuel pellets, and its sintering activity, impurity content and other parameters directly affect the pass rate of pellet products and the performance of the pellets in the reactor. The plutonium dioxide raw material used for MOX is exposed to the atmosphere for a long time. Due to the existence of moisture, the viscosity of the material increases, which affects the effect of ball milling and mixing treatment. Some reducing impurities form reducing gas impurities during the sintering process, which will hinder Sintering process. Therefore, on the premise of not significantly reducing the sintering activity of the material, it is necessary to pretreat the plutonium dioxide raw material to remove moisture and impurities and improve the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G56/00G21C19/00
CPCY02E30/30
Inventor 艾利君周国梁张顺孝潘传龙
Owner THE 404 COMPANY LIMITED CHINA NAT NUCLEAR
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