TWI865081B - Radioactive source lead storage container and method for using the same - Google Patents

Abstract

A radioactive source lead storage container is provided, which includes a tank body, a tank cover, and an annular pressing plate. The tank is cylindrical and includes a tank opening, an accommodation space, and a drainage pipe. The tank opening is arranged on the top of the tank. The accommodation space is arranged inside the tank and communicates with the outside of the radioactive source lead storage container through the opening of the tank. Both ends of the drainage pipe are connected to the outside of the radioactive source lead storage container and the accommodation space respectively. The tank lid is detachably disposed on the opening of the tank to close the accommodation space. The tank lid includes a vent pipe at both ends that communicates with the outside of the radioactive source lead storage container and the accommodation space respectively. The annular pressing plate is arranged above the tank lid and can be locked on the top of the tank body to fix the tank lid to the opening of the tank body to close the accommodation space. Among them, the tank body and the tank lid are made of lead material, and the lead material is covered with stainless steel material.

Description

Radioactive source lead storage container and method of use thereof

The present invention relates to a radioactive source lead storage container and a method of using the same.

Many industries, including medicine and nuclear power generation, use radioactive materials and produce radioactive waste. Furthermore, when radioactive sources are transported from production and storage sites to use sites by land, sea, and air, in order to avoid radiation leakage that endangers the health of workers and the general public, as well as damage to the environment and property, it is necessary to use containers with radiation leakage prevention functions.

It is known that radioactive waste is loaded underwater and placed in a sealed can with a lid, and the lid and the can body are sealed by welding. However, due to welding, if the lid and the can body are to be opened, it takes a lot of work and usually damages the container, so there is a need for improvement. In addition, when loading a radioactive source underwater and placing it in a container, it is difficult to avoid water entering the container. How to effectively discharge the water that enters the container is also a problem to be solved.

The purpose of the present invention is to provide a radioactive source lead storage container that can be opened more conveniently and can effectively drain water.

The purpose of the present invention is to provide a method for using a radioactive source lead storage container, which is more convenient to operate and can effectively drain water.

The radioactive lead storage container of the present invention comprises a tank body, a tank cover, and an annular pressure plate. The tank body is cylindrical and comprises a tank body opening, a containing space, and a drain pipe. The tank body opening is arranged at the top of the tank body. The containing space is arranged inside the tank body and communicates with the outside of the radioactive lead storage container through the tank body opening. The two ends of the drain pipe communicate with the outside of the radioactive lead storage container and the containing space, respectively. The tank cover is detachably arranged at the tank body opening to seal the containing space, and the tank cover comprises a vent pipe, the two ends of which communicate with the outside of the radioactive lead storage container and the containing space, respectively. The annular pressure plate is arranged above the can lid and can be locked to the top of the can body to fix the can lid to the can body opening to seal the storage space. The can body and the can lid are both made of lead material, and the lead material is covered with stainless steel material.

In one embodiment, both the tank body and the tank cover have a double shell structure, and the space between the double shells is filled with lead material.

In one embodiment, the drain pipe has a drain pipe bending structure.

In one embodiment, the vent tube has a vent tube bending structure.

In one embodiment, the bottom of the accommodating space has an inclined structure.

In one embodiment, the bottom of the accommodating space is inclined from the periphery to the center.

In one embodiment, a plurality of lifting ears are provided around the top of the tank body.

In one embodiment, a hanging ring is provided on the top of the tank cover.

In one embodiment, the radioactive source lead storage container further includes a hanging basket that can be accommodated in the accommodating space, and the hanging basket is cylindrical and has a plurality of upright and closely arranged pipes disposed inside.

The method for using the radioactive source lead storage container of the present invention comprises: placing the radioactive source in a hanging basket in water and positioning it in a plurality of pipes; placing the hanging basket in a storage space in water; placing a can lid on the opening of the can body to seal the storage space; taking the radioactive source lead storage container out of water; and injecting pressurized air into the can body through a vent pipe.

100: Tank

104: hanging ear

107: Tank inner shell

108: Tank shell

109: Lead

110: Tank opening

120: Storage space

129: Tilt structure

130: Drain pipe

131, 132: End

139: Drain pipe bending structure

200:Can lid

204: Rings

207: Tank lid inner shell

208: Tank cover shell

209: Lead

210: Ventilation pipe

211, 212: End

219: Ventilation pipe bending structure

300: Ring pressure plate

400: Basket

410: Pipe fittings

900: Radioactive source lead container

1000:Steps

2000: Steps

3000: Steps

4000:Steps

5000:Steps

Figure 1 is a schematic diagram of an embodiment of the radioactive source lead storage container of the present invention.

Figure 2 is a cross-sectional schematic diagram of an embodiment of the radioactive source lead storage container of the present invention.

Figure 3 is a schematic diagram of the decomposition of an embodiment of the radioactive source lead storage container of the present invention.

Figure 4 is a schematic cross-sectional view of an embodiment of the tank body in the radioactive source lead storage container of the present invention.

Figure 5 is a schematic diagram of an embodiment of the hanging basket in the radioactive source lead storage container of the present invention.

Figure 6 is a schematic diagram of an embodiment of the method for using the radioactive source lead storage container of the present invention.

The following is a specific embodiment and a diagram to illustrate the implementation of the connection assembly disclosed in the present invention. A person skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. However, the contents disclosed below are not intended to limit the scope of protection of the present invention. Without departing from the principle of the spirit of the present invention, a person skilled in the art can implement the present invention with other different embodiments based on different viewpoints and applications. In the accompanying drawings, for the sake of clarity, the thickness of layers, films, panels, regions, etc. is magnified. Throughout the specification, the same figure markings represent the same elements. It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to another element, or an intermediate element can also exist. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements. As used herein, "connected" may refer to physical and/or electrical connections. Furthermore, "electrically connected" or "coupled" may mean that there are other elements between two elements.

It should be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and/or parts, these elements, components, regions, and/or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, the "first element", "component", "region", "layer" or "part" discussed below can be referred to as the second element, component, region, layer or part without departing from the teachings of this article.

Additionally, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe the relationship of one element to another element, as shown in the figures. It should be understood that relative terms are intended to include different orientations of the device in addition to the orientation shown in the figures. For example, if the device in one figure is flipped, the elements described as being on the "lower" side of the other elements will be oriented on the "upper" side of the other elements. Thus, the exemplary term "lower" can include both "lower" and "upper" orientations, depending on the particular orientation of the figure. Similarly, if the device in one figure is flipped, the elements described as being "below" or "beneath" the other elements will be oriented as being "above" the other elements. Thus, the exemplary term "below" or "beneath" can include both "upper" and "lower" orientations.

As used herein, "approximately", "approximately", or "substantially" includes the stated value and the average value within an acceptable deviation range of a specific value determined by a person of ordinary skill in the art, taking into account the measurement in question and the specific amount of error associated with the measurement (i.e., the limitations of the measurement system). For example, "approximately" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, "approximately", "approximately", or "substantially" as used herein can select a more acceptable deviation range or standard deviation based on the optical properties, etching properties, or other properties, and can apply to all properties without a single standard deviation.

As shown in the embodiments of FIG. 1 to FIG. 3 , the radioactive lead storage container 900 of the present invention comprises a tank body 100, a tank cover 200, and an annular pressure plate 300. As shown in the embodiment of FIG. 3 , the tank body 100 is cylindrical and comprises a tank body opening 110, a containing space 120, and a drain pipe 130. The tank body opening 110 is disposed at the top of the tank body 100. The containing space 120 is disposed inside the tank body 100 and communicates with the outside of the radioactive lead storage container 900 through the tank body opening 110. The two ends 131 and 132 of the drain pipe 130 communicate with the outside of the radioactive lead storage container 900 and the containing space 120, respectively. The tank cover 200 is detachably mounted on the tank opening 110 to seal the accommodating space 120. The tank cover 200 includes a vent pipe 210 whose two ends 211 and 212 are respectively connected to the outside of the radioactive source lead storage container 900 and the accommodating space 120. The tank body 100 and the tank cover 200 are both made of lead material, and the lead material is covered with stainless steel material.

Viewed from different angles, as shown in the embodiment of FIG. 3 , the tank body 100 and the tank cover 200 both have a double shell structure, and the space between the double shells is filled with lead material. More specifically, the tank body 100 has a tank body inner shell 107 and a tank body outer shell 108 made of stainless steel for rust prevention and strength, and lead 109 is filled between the tank body inner shell 107 and the tank body outer shell 108 for radiation shielding. The tank cover 200 has a tank cover inner shell 207 and a tank cover outer shell 208 made of stainless steel for rust prevention and strength, and lead 209 is filled between the tank cover inner shell 207 and the tank cover outer shell 208 for radiation shielding.

As shown in the embodiment of FIG. 1 to FIG. 3, the annular pressure plate 300 is arranged above the tank cover 200 and can be locked to the top of the tank body 100, so as to fix the tank cover 200 to the tank body opening 110 to close the storage space 120. In other words, the tank cover 200 can be removed from the tank body opening 110 by simply removing the annular pressure plate 300 from the top of the tank body 100, and the radioactive source lead storage container 900 can be conveniently opened to place or remove the radioactive source in the storage space 120. In order to facilitate the hanging operation, a plurality of hanging ears 104 can be arranged around the top of the tank body 100, and a hanging ring 204 can be arranged on the top of the tank cover 200.

As mentioned above, when loading a radioactive source underwater and placing it in a container, it is difficult to avoid water from entering the container. For this problem, as shown in the embodiment of FIG. 3, in the radioactive source lead storage container 900 of the present invention, pressurized air can be poured into the tank body 100 through the vent pipe 210, so that the water in the accommodating space 120 is discharged from the drain pipe 130, thereby avoiding water accumulation in the tank body 100. In addition, the drain pipe 130 can further have a drain pipe bending structure 139, and the vent pipe 210 can further have a vent pipe bending structure 219. These bending structures can reduce the chance of radiation being transmitted from the drain pipe 130 or the vent pipe 210.

As shown in the embodiment of FIG. 3 and FIG. 4 , the bottom of the accommodating space 120 has an inclined structure 129. More specifically, the bottom of the accommodating space 120 is inclined from the periphery to the center. Accordingly, the water at the bottom of the accommodating space 120 can flow into the drain pipe 130 through the inclined structure 129 under the action of gravity, which can improve the drainage efficiency and further avoid water accumulation in the tank 100.

In the embodiment shown in FIG. 2 , in order to achieve a sufficient radiation shielding effect, the accommodating space 120 must be surrounded by a sufficient thickness of lead, so the tank cover 200 used to seal the upper portion of the accommodating space 120 must have a sufficient thickness. In other words, the tank opening 110 must have a sufficient depth to accommodate the tank cover 200. However, when placing radioactive sources such as metal rods into the tank 100 for arrangement underwater (proper arrangement can more effectively utilize space), the operation flexibility is lower than that on land, and the deeper tank opening 110 is not convenient for operation. In this regard, as shown in the embodiments of FIG. 2 and FIG. 5 , the radioactive source lead storage container 900 of the present invention further includes a hanging basket 400 that can be accommodated in the accommodating space 120. The hanging basket 400 is cylindrical, and a plurality of upright and closely arranged pipes 410 such as stainless steel pipes are arranged inside. The upright and closely arranged stainless steel pipes inside can be arranged to further facilitate the proper arrangement of the radioactive sources to fully improve the utilization rate of the space inside the hanging basket, thereby further improving efficiency. For example, the radioactive source may be a cobalt-60 waste source, including a large D-radiation source with a diameter of 25.5 mm, a length of 334 mm, and a weight of 0.28 kg/piece, and a small D-radiation source with a diameter of 11.1 mm, a length of 451.6 mm, and a weight of 0.24 kg/piece, which can be loaded into 36 large stainless steel pipes with an outer diameter of Φ 28.6 mm and an inner diameter of Φ 27.4 mm, and 42 small stainless steel pipes with an outer diameter of Φ 14.3 mm and an inner diameter of Φ 13.1 mm. During underwater operation, the radioactive source may be first placed in the pipe 410 of the hanging basket 400, and then placed in or removed from the accommodating space 120 together with the hanging basket 400. Since there will be no operational inconvenience caused by the large depth when inserting and arranging the radioactive sources in the hanging basket 400, the efficiency of taking and placing the radioactive sources can be improved.

Furthermore, as shown in the schematic diagram of the embodiment process in FIG6, the method for using the radioactive source lead storage container of the present invention includes, for example, the following steps.

Step 1000, placing a radioactive source in a basket in water and positioning it in a plurality of pipes. More specifically, placing a radioactive source such as a metal rod in water into a basket 400 as shown in FIG. 2 and FIG. 5 and positioning it in a plurality of pipes 410.

Step 2000, placing the hanging basket into the containing space in water. More specifically, placing the hanging basket 400 shown in FIG. 2 into the containing space 120 in water.

Step 3000, the can lid is placed on the can body opening to seal the containing space. More specifically, the can lid 200 shown in FIG. 2 is placed on the can body opening 110 to seal the containing space 120.

Step 4000, remove the radioactive source lead storage container from the water. More specifically, remove the radioactive source lead storage container 900 shown in FIG. 3 from the water.

Step 5000, pressurized air is poured into the tank body through the vent pipe. More specifically, pressurized air is poured into the tank body 100 through the vent pipe 210 shown in FIG. 3, so that the water in the accommodating space 120 is discharged through the drain pipe 130.

The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and equivalent arrangements within the spirit and scope of the patent application are included in the scope of the present invention.

100: Tank

104: hanging ear

107: Tank inner shell

108: Tank shell

109: Lead

110: Tank opening

120: Storage space

129: Tilt structure

130: Drain pipe

131, 132: End

139: Drain pipe bending structure

200:Can lid

204: Rings

207: Tank lid inner shell

208: Tank cover shell

209: Lead

210: Ventilation pipe

211, 212: End

219: Ventilation pipe bending structure

300: Ring pressure plate

400: Basket

410: Pipe fittings

900: Radioactive source lead container

Claims (9)

A radioactive lead storage container comprises: a cylindrical tank body, comprising: a tank body opening, arranged at the top of the tank body; a containing space, arranged inside the tank body, communicating with the outside of the radioactive lead storage container through the tank body opening; and a drainage pipe, two ends of which are respectively communicated with the outside of the radioactive lead storage container and the containing space; a tank cover, which is detachably arranged at the tank body opening to seal the containing space, and the tank cover comprises a drain pipe, two ends of which are respectively communicated with the outside of the radioactive lead storage container and the containing space. A vent pipe connected to the outer side of the container and the containing space; and an annular pressure plate, arranged above the tank cover, which can be locked to the top of the tank body to fix the tank cover to the opening of the tank body to close the containing space; a hanging basket that can be accommodated in the containing space, the hanging basket is cylindrical, and a plurality of upright and closely arranged pipes are arranged inside, and the plurality of pipes have a plurality of pipe diameters; wherein the tank body and the tank cover are both made of lead material, and the lead material is covered with stainless steel material. A radioactive lead storage container comprises: a cylindrical tank body, comprising: a tank body opening, arranged at the top of the tank body; a containing space, arranged inside the tank body, communicating with the outside of the radioactive lead storage container through the tank body opening; and a drainage pipe, two ends of which are respectively connected to the outside of the radioactive lead storage container and the containing space; a tank cover, which is detachably arranged on the tank body opening to seal the containing space, and the tank cover comprises a drain pipe, two ends of which are respectively connected to the outside of the radioactive lead storage container and the containing space; a vent pipe connected to the outer side of the tank and the containing space; and an annular pressure plate, arranged above the tank cover, which can be locked to the top of the tank body to fix the tank cover to the opening of the tank body to close the containing space; a hanging basket that can be accommodated in the containing space, the hanging basket is cylindrical, and a plurality of upright and closely arranged pipes are arranged inside, and the plurality of pipes have a plurality of pipe diameters; wherein the tank body and the tank cover are both structures with inner and outer double shells, and the space between the double shells is filled with lead material. A radioactive source lead storage container as described in claim 1 or 2, wherein the drain pipe has a drain pipe bending structure. A radioactive source lead storage container as described in claim 1 or 2, wherein the ventilation tube has a ventilation tube bending structure. A radioactive source lead storage container as described in claim 1 or 2, wherein the bottom of the storage space has an inclined structure. A radioactive source lead storage container as described in claim 1 or 2, wherein the bottom of the storage space is inclined from the periphery to the center. A radioactive source lead storage container as described in claim 1 or 2, wherein a plurality of lifting ears are provided around the top of the container. A radioactive source lead storage container as described in claim 1 or 2, wherein a hanging ring is provided on the top of the can lid. A method for using a radioactive source lead storage container as described in claim 1, comprising: placing a radioactive source in a hanging basket in water and positioning it in the plurality of pipes; placing the hanging basket in the storage space in water; placing the can lid on the opening of the can body to seal the storage space; taking the radioactive source lead storage container out of water; and injecting pressurized air into the can body through the vent pipe.

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