Silo for geological storage of nuclear waste

Abstract

The silo comprises a silo body with an opening in the upper portion, a storage cavity is formed in the silo body, a plurality of vertical separation walls are arranged in the storage cavity, and the separation walls divide the storage cavity into a plurality of vertical shafts used for containing the nuclear waste; a first enclosure bulkhead for defining a storage cavity is arranged on the outer edge of the barrel body, and a bentonite layer is arranged outside the first enclosure bulkhead; and a first top cover is arranged at the opening of the barrel body. The silo for geological storage of the nuclear waste can be applied to domestic nuclear power stations and used for disposing medium and low radioactive nuclear waste generated and accumulated in the operation of the nuclear power stations, the whole silo comprises multiple layers of barriers, safe storage and isolation of the medium and low radioactive nuclear waste can be achieved, radiation can be effectively shielded, and the service life of the silo is prolonged. And a protection effect is achieved on human beings and biological groups.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nuclear waste treatment, and more particularly, to a silo for geological storage of nuclear waste. BACKGROUND

[0002] Nuclear safety and radioactive pollution prevention are related to public health, environmental safety and social stability.

[0003] With the rapid development of China's nuclear power industry, the number of under-construction and in-operation units is gradually increasing, and the amount of medium and low level radioactive nuclear waste generated and accumulated during the operation of nuclear power plants is also increasing. How to safely dispose of these medium and low level radioactive nuclear waste has become one of the key factors for the sustainable development of China's nuclear power. However, the construction and operation of the disposal site for medium and low level radioactive nuclear waste in China's nuclear power plants are progressing slowly, and there are some problems to be solved, so it is imperative to speed up the construction and operation of the disposal site for medium and low level radioactive nuclear waste. CONTENT OF THE UTILITY MODEL

[0004] To solve the problem of storage of medium and low level radioactive nuclear waste, the utility model provides a silo for geological storage of medium and low level radioactive nuclear waste, which can effectively shield radiation and realize safe storage and isolation of medium and low level radioactive nuclear waste.

[0005] The technical scheme adopted by the present application to solve its technical problem is to construct a silo for geological storage of nuclear waste, comprising a silo body with an upper opening, a storage cavity is arranged inside the silo body, a plurality of vertical isolation walls are arranged in the storage cavity, the isolation walls divide the storage cavity into a plurality of vertical shafts for placing nuclear waste; a first enclosing wall for defining the storage cavity is arranged on the outer edge of the silo body, and a bentonite layer is arranged outside the first enclosing wall; a first top cover is arranged at the opening of the silo body.

[0006] In some embodiments of the present application, the silo body is arranged inside a rock layer.

[0007] In some embodiments of the present application, the silo further comprises a second top cover, the second top cover is arranged above the first top cover, a filling layer is arranged between the first top cover and the second top cover, and the filling layer is backfilled with compacted material.

[0008] In some embodiments of the present application, the first top cover and the second top cover are concrete top covers.

[0009] In some embodiments of the present application, the first enclosing wall is a reinforced concrete structure.

[0010] In some embodiments of the present application, the isolation wall is a reinforced concrete structure.

[0011] In some embodiments of the present application, the partition wall divides the shaft into multiple areas.

[0012] In some embodiments of the present application, the shaft is filled with concrete for covering nuclear waste.

[0013] In some embodiments of the present application, an exhaust pipe is arranged below the first top cover for discharging air in the shaft.

[0014] In some embodiments of the present application, a base layer is arranged at the bottom of the barrel body, and the base layer is compacted by bentonite.

[0015] The present application has at least the following beneficial effects: the silo for nuclear waste geological storage provided by the present application can be applied in domestic nuclear power plants to dispose of medium and low radioactive nuclear waste generated and accumulated during the operation of the nuclear power plants. The entire silo includes multiple barriers, which can achieve safe storage and isolation of medium and low radioactive nuclear waste, effectively shield radiation, and protect humans and biological groups. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0017] Figure 1 is a structural schematic diagram of the silo for nuclear waste geological storage provided by the present application;

[0018] Figure 2 is Figure 1 a sectional view of

[0019] DETAILED DESCRIPTION

[0020] Base layer 10, barrel body 20, storage cavity 21, first surrounding wall 22, bentonite layer 23, partition wall 24, shaft 25, first top cover 30, exhaust pipe 31, filling layer 40, and second top cover 50. DETAILED DESCRIPTION

[0021] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the drawings. In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0022] In the description of the present application, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "top", "bottom", "inner", "outer" and the like refer to the orientation or position relationship shown in the drawings or the orientation or position relationship commonly used when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0023] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0024] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above" the second feature can be directly above or obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The first feature "below" the second feature can be directly below or obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.

[0026] Reference Figure 1 and Figure 2 , Figure 1The illustration shows a silo for geological storage of nuclear waste provided in some embodiments of this application, comprising a silo body 20 disposed within a rock stratum, an opening at the top of the silo body 20, and the silo body 20 being enclosed by a first wall 22, which is a reinforced concrete structure. A bentonite layer 23 is disposed outside the first wall 22, and a base layer 10, formed by compacted bentonite, is disposed at the bottom of the silo body 20. The silo body 20 is completely surrounded by bentonite, which forms a barrier between the silo body 20 and the rock. Bentonite is used considering groundwater flow because the bentonite buffer layer surrounding the silo body 20 has low permeability, which limits advection through the silo body 20.

[0027] The cylinder body 20 contains a storage cavity 21 defined by a first enclosure wall 22. Within the storage cavity 21 are several vertical isolation walls 24, which are reinforced concrete structures. These isolation walls divide the storage cavity 21 into several shafts 25 for storing nuclear waste. Further, as... Figure 2 As shown, the isolation wall 24 divides the space into shafts 25 of varying sizes, allowing for the placement of nuclear waste of different dimensions. The nuclear waste consists of a waste matrix and a waste container. The nuclear waste is placed in the shafts 25, and the gap between the nuclear waste and the shafts 25 is filled with concrete. The concrete covers the nuclear waste to limit the release of radionuclides. The shafts are covered with concrete grout up to the top opening of the silo 20. A first top cover 30 is installed at the opening of the silo 20, and an exhaust pipe 31 is located below the first top cover 30. The exhaust pipe 31 is used to expel air from the shafts 25 when concrete is poured into them. The silo also includes a second top cover 50, both of which are concrete covers. The second top cover 50 is positioned above the first top cover 30, and a filling layer 40 is provided between the first top cover 30 and the second top cover 50. The filling layer 40 is backfilled with compacted material.

[0028] The silo of this application comprises multiple layers of barriers. The concrete poured into the shaft 25 forms the first layer of barrier, the partition wall 24 and the first enclosure wall 22 constitute the second layer of barrier, the bentonite layer 23 constitutes the third layer of barrier, and the outermost barrier is the surrounding rock mass. Through this multi-layered barrier design, the safe storage and isolation of low- and intermediate-level radioactive nuclear waste can be achieved, effectively shielding radiation and protecting humans and the wider biosphere. Therefore, the silo of this application can be applied in domestic nuclear power plants to dispose of low- and intermediate-level radioactive nuclear waste generated and accumulated during the operation of nuclear power plants.

[0029] The above examples only express the specific implementation of the present application, which is described in detail and specifically, but cannot be understood as the limitation of the patent scope of the present application; it should be pointed out that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and some modifications and improvements can be made, which belong to the protection scope of the present application; therefore, any equivalent transformation and modification within the scope of the claims of the present application shall belong to the scope of the claims of the present application.

Claims

1. A silo for geological storage of nuclear waste, characterized in that, The silo comprises a barrel (20) with an upper opening, an internal storage cavity (21) is arranged in the barrel (20), a plurality of vertical partition walls (24) are arranged in the storage cavity (21), the partition walls (24) divide the storage cavity (21) into a plurality of vertical shafts (25) for placing nuclear waste; a first surrounding wall (22) for defining the storage cavity (21) is arranged on the outer edge of the barrel (20), a bentonite layer (23) is arranged outside the first surrounding wall (22); a first top cover (30) is arranged at the opening of the barrel (20).

2. A silo for geological storage of nuclear waste according to claim 1, characterized in that The barrel (20) is arranged inside a rock layer.

3. A silo for nuclear waste geologic storage according to claim 1 or 2, characterized in that, The silo further comprises a second top cover (50), the second top cover (50) is arranged above the first top cover (30), a filling layer (40) is arranged between the first top cover (30) and the second top cover (50), and compacted material is backfilled in the filling layer (40).

4. A silo for geological storage of nuclear waste according to claim 3, characterized in that The first top cover (30) and the second top cover (50) are concrete top covers.

5. A silo for geological storage of nuclear waste according to claim 1 or 2, characterized in that, The first surrounding wall (22) is a reinforced concrete structure.

6. A silo for nuclear waste geologic storage according to claim 1 or 2, characterized in that, The partition walls (24) are reinforced concrete structures.

7. A silo for nuclear waste geologic storage according to claim 1 or 2, characterized in that, The partition walls (24) divide the vertical shafts (25) into multiple areas.

8. A silo for nuclear waste geologic storage according to claim 1 or 2, characterized in that, The vertical shafts (25) are filled with concrete for covering nuclear waste.

9. A silo for geological storage of nuclear waste according to claim 8, characterized in that An exhaust pipe (31) for discharging air in the vertical shafts (25) is arranged below the first top cover (30).

10. A silo for geological storage of nuclear waste according to claim 1 or 2, characterized in that, A base layer (10) is arranged at the bottom of the barrel (20), and the base layer (10) is compacted from bentonite.

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