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Top cover of radwaste shallow buried repository

A technology of radioactive waste and top cover, applied in radioactive purification, reactor, shielding and other directions, can solve the problems of weak resistance to natural force erosion, complex structure, low strength, etc., to achieve strong resistance to natural force, prevent The effect of good permeability and high strength

Inactive Publication Date: 2008-04-02
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Large thickness and complex structure
The surface vegetation layer is composed of clay, although it is good for vegetation growth, but due to its low strength, the ability to resist natural erosion is weak

Method used

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  • Top cover of radwaste shallow buried repository
  • Top cover of radwaste shallow buried repository
  • Top cover of radwaste shallow buried repository

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] Referring to Fig. 1, the roof of the radioactive waste repository of the present invention comprises a surface vegetation layer 1 with a thickness of 40cm consisting of sand and gravel, and a 70cm layer with a thickness of 70cm that is composited at the bottom surface of the surface vegetation layer and is composed of clay and gravel. Upper aquifer 2, an aquifer 3 with a thickness of 70 cm and a composite gravel located at the bottom of the upper aquifer, an aquifer 3 with a thickness of 120 cm and a compound with clay and gravel at the bottom of the aquifer Water barrier 4. The slope on the surface vegetation layer is 10°. The lower part of the water guiding layer is provided with a drainage ditch 5 .

[0050] The percentage by weight of sand and gravel in the above-mentioned surface vegetation layer is 60%, 40%, and the diameter of the gravel is 2 to 10 cm. 40-36%, the diameter of the gravel is 10-30cm, the diameter of the gravel in the aquifer is 2-30cm, and the po...

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Abstract

The invention provides a radioactive waste shallow burying dispose repository top cover, which comprises a surface vegetation layer consisting of sand soil and gravel, an upper aquiclude positioned at and combined with the underside of the surface vegetation layer and consisting of clay and gravel, a water-conductivity layer positioned at and combined with the underside of the upper aquiclude and consisting of gravel, and a lower aquiclude positioned at and combined with the bottom of the water-conductivity layer and consisting of clay and gravel. The invention is propitious to vegetation growth and has high strength, strong ability to resist natural agent corrosion and bio-infestation, ideal anti seepage property and a simple structure; moreover, the invention can maintain long-term stability without maintenance.

Description

Technical field: [0001] The invention relates to the top cover of a solid waste disposal storehouse, in particular to the top cover of a shallow radioactive waste disposal storehouse. Background technique: [0002] The roof is an important protective barrier for the near-surface repository of low- and intermediate-level radioactive waste, and plays an important role in the long-term safety of the radioactive waste repository. [0003] The top cover should generally have the following functions; [0004] (1) Reduce the infiltration of rainfall and surface runoff. [0005] (2) Prevent or reduce the contact of seepage water and waste through the aquifer and drainage layer. [0006] (3) Reduce surface erosion. [0007] (4) Anti-biological infestation. [0008] (5) Anti-freezing and thawing erosion. [0009] (6) It has high compressive strength and certain plastic deformation to achieve the purpose of anti-cracking and anti-collapse. [0010] (7) Maintain long-term stabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F9/00G21F1/00G21F1/12
Inventor 虞修竞倪师军张成江李宽良王永利徐德敏蔡国军裴钻谭金花
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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