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A sandwich type inert gas shielded heat chamber

An inert gas, interlayer technology, applied in the field of interlayer inert gas protection hot cells, can solve problems such as no inert gas protection hot cells, and achieve the effect of reducing radioactive dose, avoiding cross-contamination, and reducing emissions

Active Publication Date: 2018-03-13
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no inert gas shielded hot chamber that can be used for nuclear fuel dry reprocessing and nuclear chemical dry metallurgy

Method used

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  • A sandwich type inert gas shielded heat chamber
  • A sandwich type inert gas shielded heat chamber
  • A sandwich type inert gas shielded heat chamber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A sandwich type inert gas shielded heat chamber, such as Figure 1 ~ Figure 3 As shown, the hot cell mainly includes a hot cell main body 1, a gas circulation purification device 2, an aerosol filter device 3, an automatic pressure control system, and a material entry and exit device, wherein the gas circulation purification device 2 and the automatic pressure control system operation panel 6 are located in the heat chamber. Outside the chamber main body 1, the material inlet and outlet device is in sealing connection with the hot chamber main body 1; the inert gas is argon.

[0034] The hot cell main body 1 is a sandwich structure, which includes an inert gas sealed casing 18, a shockproof sealed casing 20, a neutron and / or gamma ray shielded casing 21 from the inside to the outside, wherein the inert gas sealed casing 18 There is a gap 19 of 1-20mm between the anti-seismic sealing shell 20, and a negative pressure is drawn on the gap 19, and the negative pressure valu...

Embodiment 2

[0047] The difference from Embodiment 1 is that there is a gap of 3 mm between the inert gas sealed casing 18 and the shockproof sealed casing 20 . Two pairs of manipulators are arranged on the front of the main body 1 of the heat chamber. The pressure inside the inert gas sealed casing is -200Pa, and the pressure in the gap provided between the inert gas sealed casing 18 and the shockproof sealed casing 20 is -500Pa.

Embodiment 3

[0049] The difference from Embodiment 1 is that there is a gap of 5 mm between the inert gas sealed casing 18 and the shockproof sealed casing 20 . The pressure inside the inert gas sealed casing 18 is -300Pa, and the pressure at the gap provided between the inert gas sealed casing 18 and the shockproof sealed casing 20 is -500Pa.

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Abstract

The invention belongs to the technical field of nuclear fuel reprocessing and nuclear chemical engineering, and discloses a sandwich-type inert gas shielding hot chamber.The hot chamber mainly comprises a hot chamber body, a gas circulating and purifying device, an aerosol filtering device, an automatic pressure control system and a material feeding and discharging device, wherein the gas circulating and purifying device and an automatic pressure control system operation panel are located outside the hot chamber body.The hot chamber body mainly comprises an inert gas sealing shell, an anti-seismic sealing shell and a neutron and / or gamma ray shielding shell, wherein a gap is formed between the inert gas sealing shell and the anti-seismic sealing shell, the inert gas sealing shell is filled with high-purity inert gas, and an inert gas inner circulation inlet and an inert gas inner circulation outlet are formed in the diagonal corners of the inert gas sealing shell.The gas circulating and purifying device comprises a fan and a purifying column.The hot chamber has the advantages that insert gas can be controlled, radioactive aerosol can be efficiently filtered, and the requirements for low water and low oxygen can be met.

Description

technical field [0001] The invention belongs to the technical field of nuclear fuel post-processing and nuclear chemical industry, and in particular relates to a sandwich type inert gas-protected heat chamber used for nuclear fuel dry post-processing and nuclear chemical dry metallurgy. Background technique [0002] Nuclear fuel reprocessing includes dry reprocessing and water reprocessing, and nuclear chemical industry and metallurgy also includes dry (non-aqueous system) treatment and water treatment. The operation process of materials with strong neutron and / or photon radioactivity usually needs to be carried out in a hot chamber. The current industrialized water post-treatment technology uses a micro Negative pressure atmosphere hot chamber, in order to reduce the accumulation of radioactive aerosols in the hot chamber, it is generally achieved by continuously replacing the gas in the hot chamber. Therefore, its most important design index is the number of air changes. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21C19/50
CPCG21C19/50Y02E30/30
Inventor 何辉林如山孟照凯陈辉王长水叶国安宋鹏张凯贾艳虹唐洪彬
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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