KR200408259Y1 - Three layered wall structure vessel for collection, dehydration and safekeeping of waste ion exchange resin - Google Patents

Abstract

The present invention relates to a waste ion exchange resin collection, dehydration and storage container of the triple structure, more specifically, an inner cylinder for safely collecting and dewatering waste ion exchange resin; Outer cylinder to protect the whole container; And an intermediate layer filled between the inner cylinder and the outer cylinder and filled with a material for mitigating the impact from the outside and preventing external dispersion of the waste resin due to the inner cylinder rupture. And a storage container, the waste ion exchange resin collection, dehydration and storage container of the triple structure according to the present invention is easy to inject and discharge the radioactive waste resin, as well as excellent stability and convenience of radioactive waste resin operation, Dehydration of the resin can be quickened, and functions that can prevent the dispersion of waste resins in the event of a similar effect can provide a useful effect that can be achieved in one container.

Ion exchange resin, radioactivity, filter

Description

Three layered wall structure vessel for collection, dehydration and safekeeping of waste ion exchange resin

1 is a cross-sectional view of one side of a waste ion exchange resin collection, dehydration and storage container of a triple structure according to an embodiment of the present invention,

2 shows one side cross-sectional view of a filter according to an embodiment of the present invention,

3 is a side cross-sectional view of a vent according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: inner cylinder 110: waste resin injection / discharge pipe

120: filter 121: support

122 sieve or filter 130 resin height measuring tube

140: vent 141: check valve

142: filter 150: emergency lid

160: dehydration and water supply pipe 170: resin ruler

180: spare tube

200: outer cylinder 210: vent

300: middle layer

The present invention relates to a collection, dehydration and storage container of the waste ion exchange resin of the triple structure, more specifically, the waste ion exchange resin generated from nuclear power plants and related facilities, nuclear research and facilities, radioisotope use facilities, etc. Inner cylinder for safe collection and dehydration of (waste resin); Outer cylinder to protect the whole container; And an intermediate layer filled between the inner cylinder and the outer cylinder and filled with a material for mitigating the impact from the outside and preventing external dispersion of the waste resin due to the inner cylinder rupture. And storage containers.

Nuclear power plants, especially pressurized light-water reactors, which occupy most of Korea's nuclear power plants, use ion exchange resins to purify the reactor primary cooling water system, and also use ion exchange resins to purify radioactive wastewater. In addition, the Hanaro facility, the only research reactor in Korea, is using ion exchange resins to purify primary cooling water systems and nuclear fuel storage tanks.Ion is used to purify spent nuclear fuel storage tanks at test facilities after research at the Korea Atomic Energy Research Institute. Exchange resins are being used. In addition, ion exchange resins have been used in various ways to purify cooling water and wastewater containing radioactive materials.

However, waste ion exchange resins used in nuclear power plants have a high radioactivity due to radioactive substances accumulated in the resin, and they are very careful to be handled and stored because they are easily dispersed into small spherical particles of 0.3 to 0.8 mm in size. shall.

Waste ion exchange resins generated from nuclear power plants and related facilities, nuclear research institutions and facilities, and radioisotope facilities are discharged from ion exchange towers and stored in storage tanks of a certain size. ), But the solidification method is not complete, so there are many cases where it is temporarily stored until a suitable treatment method is developed. In this case, only the capacity of the first designed storage tank has a limit in storing waste ion exchange resins that continue to be generated. In addition, if a waste ion exchange resin treatment apparatus is not provided in a nuclear power plant, the waste ion exchange resin should be transported to another facility with a treatment apparatus for treatment of the waste ion exchange resin, and during this process, the waste ion exchange resin should be kept in a container for a while. In some cases.

Until now, conventional drums or plastic lining drums and concrete drums have been used for storing waste ion exchange resins.They only have the storage function of the container itself, and they are easy to inject and discharge waste resin, safety and convenience at this time, Dispersion blocking ability and stability at storage are not considered at all. In addition, there is no dehydration device necessary for the storage process or only a manual dehydration operation is possible.

U.S. Patent No. 4,687,614 discloses a High Integrity Container, currently in use in the United States, whose purpose is not to transport and store waste resin, but to permanently dispose of waste resin in a container. will be. Therefore, high-integrity containers are very expensive because they must be able to guarantee mechanical stability, durability, leaching resistance to water, biological stability, etc. for 300 years, and they are temporarily stored because they are designed so that they do not need to be removed again. It is not used for the purpose.

Accordingly, the present inventors have diligently researched to solve or improve the above-mentioned problems. As a result, the present invention provides an inner cylinder for safely collecting and dehydrating waste ion exchange resin (waste resin); Outer cylinder to protect the container; And an intermediate layer having a filler positioned between the inner cylinder and the outer cylinder to mitigate the impact from the outside and to prevent external dispersion of the waste resin due to the bursting of the inner cylinder. It is not only easy to inject and discharge waste resin, but also excellent in stability and convenience of waste resin operation, and it is possible to dehydrate waste resin more quickly, and has functions to prevent dispersion of waste resin in case of emergency. It was confirmed that the present invention was completed.

Therefore, the present invention is easy to inject and discharge the radioactive waste resin, and at this time, not only the stability and convenience of the radioactive waste resin operation is excellent, but also the dehydration of the waste resin can be quickly carried out, and in case of emergency, the dispersion of the waste resin can be prevented. Its purpose is to provide a waste ion exchange resin collection, dehydration and storage container with a triple structure that can be achieved in one container.

In order to achieve the above technical problem, the present invention is a cylindrical body, the resin injection / discharge pipe 110 which is deflected to one side from the central axis of the upper surface protruding to inject or discharge the waste resin, and the resin injection Resin height measuring tube 130 protrudingly formed to measure the height of the resin adjacent to the discharge pipe 110, and is installed sealed to the central axis of the upper surface in order to observe the resin or to quickly discharge the resin An emergency lid 150 attached to the central axis of the upper surface, a vent 140 protruded to prevent the inflow of external air and foreign substances by being deflected to the other side from the central axis of the upper surface, and adjacent to the vent 140. And extending in the vertical direction but having a narrow and long tubular dehydration and water supply pipe 160 for dewatering and supplying resin, which are installed at a distance from the bottom surface, and the dewatering and water supply pipe 160. The inner tube 100 is formed in downwardly extending end of the molding resin ruler 170 is attached is formed on one side of the filter 120, and the drainage and water supply line 160 for dewatering the water present between the resin having;

An outer cylinder 200 accommodating the inner cylinder 100 and provided with a vent 210 protruding from one side of an upper surface thereof; And

A waste ion exchange resin collection having a triple structure comprising: an intermediate layer (300) buried between the inner cylinder (100) and the outer cylinder (200) to buffer external shocks and prevent resin dispersion when the inner cylinder is ruptured. Provide dehydration and storage containers.

Hereinafter, with reference to the accompanying drawings to help the understanding of the present invention will be described in detail.

Waste ion exchange resin collection, dehydration and storage container of the present invention is a three-layered wall structure as a whole, as shown in Figure 1 , inner vessel (100; inner vessel), outer vessel (200; outer vessel) and the intermediate layer ( 300; intermediate layer).

In the collection, dehydration and storage container of the waste ion exchange resin of the triple structure according to the present invention, the innermost cylinder 100 should be non-invasive as a container for containing waste resin, and has chemical resistance, acid resistance and corrosion resistance. It should be made of a reinforcing material having, preferably, may be made of a polymer material such as polyethylene, polyvinyl chloride, glass fiber reinforced plastic, and the like, but may be made of iron or stainless steel, but is not limited thereto.

The inner cylinder 100 is a space in which the most important and practical work is performed in the present invention, such as waste resin collection, dehydration, and substantial storage, and a resin injection / discharge tube 110, a resin height measurement tube 130, and an emergency lid 150. ), The vent 140, the dewatering and water supply pipe 160, the filter 120 and the resin ruler 170 may be installed, but the shape is not particularly limited.

The resin injection / exhaust tube 110 is preferably protruded to be inclined to one side from the central axis of the upper surface of the inner cylinder 100 of the cylindrical body to inject or discharge the waste resin.

The resin height measuring tube 130 is for measuring the height of the waste resin being injected, discharged, and stored, and is installed on the same plane as the resin injection / discharge tube 110 of the upper surface of the inner cylinder 100, and the resin injection It is preferable to protrude adjacent to the discharge pipe 110.

The emergency lid 150 is normally sealed and can not be opened, but in the case of an emergency, the inner lid is opened and opened to be attached to the central axis of the upper surface as a device for observing the inside or quickly discharging the resin to the outside.

The vent 140 may be protruded to the other side from the central axis of the upper surface of the inner cylinder 100 relatively to the inlet / discharge tube 110 to prevent the inflow of external air and foreign matter. At this time, the vent 140, as shown in an embodiment of the present invention in Figure 3 , the outside air is made to discharge only the internal air to the outside while airtight so as not to enter into the inside of the outside air and foreign inflow of foreign matter A check valve 141 for blocking; And it is mounted to the lower end of the check valve 141 and allow the discharge of only air, but the resin is preferably provided with a sieve or filter 142 that does not allow the passage. The sieve has a hole of 0.1 mm or less, allowing air to pass through, but not resin. The check valve may allow air to go out from the inside but prevents outside air or foreign matter from entering the inner cylinder 100. Therefore, it functions to naturally control the pressure in the container generated by temperature change while preventing waste outflow of the resin, inflow of foreign matters from the outside, and the like.

The dehydration and water supply pipe 160 is an elongated tubular shape for dehydration and water supply of the resin, which is adjacent to the vent 140 and extends in a vertical direction from one side of the upper surface of the inner cylinder 100, but has a lower inner cylinder 100. It is preferable to be installed in close proximity from the surface. At this time, the resin ruler 170 may be attached to one side of the outer circumferential surface of the dehydration and supply pipe 160, and an observation window may be formed at a corresponding place of the container to read the scale thereof.

The filter 120 is a member for dehydrating the water present between the resin, it is preferable that the molding is formed at the lower end of the dehydration and water supply pipe 160.

Figure 2 shows one modified form of the present invention of the filter 120, the function is the same. At this time, the filter 120 is a disk-shaped support 121 extending to the inner circumference of the inner cylinder 100; And a sieve or filter 122 covering the upper surface of the support, wherein the dehydration and water supply pipe 160 penetrates through the center of the support 121 and the sieve or filter 122.

In addition, the filter 120 may be additionally provided with a decompression pump or an aspirator (not shown) to further facilitate dehydration of water present between the resins.

The bottom surface of the inner cylinder 100 may be formed to be inclined upwardly from the side of the filter 120 to one side wall or to be inclined radially from the central axis to the side wall to facilitate dehydration of the waste resin from the filter 120.

The inner cylinder 100 may additionally be provided with a preliminary tube 180 protruding adjacent to the resin injection / discharge tube 110 of the inner cylinder 100 in order to facilitate the discharge of the waste resin was stored.

In the collection, dehydration and storage container of the waste ion exchange resin of the triple structure according to the present invention, the outermost outer cylinder 200 serves to protect the container as a whole by a drum made of iron or stainless steel. The outer cylinder 200 is provided with a vent 210 protruding from one side of the upper surface.

The vent 210 is different from the vent 140 installed on the upper surface of the inner cylinder 100, while allowing the air inside to fall outward while keeping the outside air from entering the outer cylinder 200. It provides only a simple function to balance the atmospheric pressure at the storage site.

In the waste ion exchange resin collection, dehydration and storage container of the triple structure according to the present invention, an intermediate layer 300 is formed between the inner cylinder 100 and the outer cylinder 200. The intermediate layer has a buffer material for simultaneously acting to mitigate the shock transmitted to the inner cylinder when the outer shock is received, and at the same time to prevent the inner waste resin from being dispersed out in the event that the inner cylinder 100 has been ruptured or destroyed. Can be charged. The filler may preferably be a nonwoven fabric or a dense fiber having a pore size of 0.01 to 0.1 mm, but is not limited thereto.

Next, the operation of the waste ion exchange resin collection, dehydration and storage container of the triple structure according to the present invention will be described.

It is safest to treat waste resins, preferably waste ion exchange resins generated at radioisotope facilities in nuclear power plants, as slurries in water. This is because the fluidity and the dispersibility decrease. Nevertheless, the waste resin must be dehydrated once, and then the dehydrated resin must be put in the drum since it cannot be transferred to the slurry state when it is contained in a container such as a drum. Dehydrated resins have no fluidity and must be removed by the operator or mechanical devices. In this process, workers are inevitably exposed to radiation. In addition, when using a mechanical device, there is a disadvantage that the work speed is slow because the detailed work is difficult. In addition, the possibility of ambient contamination due to dispersion of waste resin during operation is also very high.

In order to eliminate such drawbacks, the present invention provides a filter 120 in the container so that the waste resin in the slurry state can be directly collected and dehydrated in a storage container. Waste resin injected along the tube 110 installed in the container in a slurry state is capable of continuously injecting waste resin by removing water through the filter 120 and the dehydration and water supply pipe 160 installed in the container.

The waste resin injected into the inner cylinder 100 contains less water than the original slurry state by the filter 120 but still contains a lot of water. The water may again dehydrate water present between the resins by using a pressure reduction pump or an aspirator in the filter 120. However, it is not preferable to dehydrate even the moisture contained in the resin.

The inner cylinder 100 is provided with a measuring tube 130 that can be equipped with a sensor for measuring the resin height. Ultrasonic sensors can be used in the measuring tubes or instruments such as endoscopes can be used to observe how much waste resin has been injected into the vessel. When using an endoscope, it is more convenient to engrave the scale (resin ruler 170) inside the container.

When the waste resin stored in the container needs to be transferred to another container or device, the resin is made into a slurry by supplying water through the dehydration and water supply pipe 160 and the filter 120 outside the container, and the tube 110 used for injection. Discharge through the reverse or through another separate preliminary pipe (180). At this time, it is more effective to put the container upside down.

The waste ion-exchange resin collection, dehydration and storage container of the triple structure according to the present invention configured as described above is easy to inject and discharge the radioactive waste resin, and in this case, it is not only excellent in stability and convenience of radioactive waste resin operation, but also waste resin. It is possible to quickly dehydrate water and to prevent the dispersion of waste resins in a single container, which can be very useful for collecting, dehydrating and storing radioactive waste ion exchange resin. It is also useful for safely collecting, dehydrating and storing waste ion exchange resins (waste resins) from nuclear power plants and related facilities, nuclear research institutions and facilities, and radioisotope facilities without the risk of radioactive exposure or environmental pollution. Can be used.

Claims (10)

As a cylindrical body, a resin injection / discharge tube 110 which is deflected to one side from the central axis of the upper surface and protrudes to inject or discharge the waste resin, and the resin height is adjacent to the resin injection / discharge tube 110. Resin height measuring tube 130 protrudingly formed for measurement, and the emergency lid 150 is installed and sealed in the central axis of the upper surface, but is opened in an emergency and attached to the central axis of the upper surface to observe the resin or to quickly discharge the resin (150) ) And a vent 140 protruded to the other side from the central axis of the upper surface to protrude to prevent the inflow of external air and foreign matter, and adjacent to the vent 140 and extending in the vertical direction, but proximate from the bottom surface. Elongated tubular dehydration and water supply pipe 160 for dewatering and supplying the resin to be spaced apart, and molding formed on the lower extension end of the dewatering and water supply pipe 160 zone between the resin Filter 120, and the inner tube 100 with the resin ruler 170 is attached is formed at one side of the drainage and water supply line 160 for dewatering the moisture; An outer cylinder 200 accommodating the inner cylinder 100 and provided with a vent 210 protruding from one side of an upper surface thereof; And A waste ion exchange resin collection having a triple structure comprising: an intermediate layer (300) buried between the inner cylinder (100) and the outer cylinder (200) to buffer external shocks and prevent resin dispersion when the inner cylinder is ruptured. Dehydration and storage containers. The waste ion exchange resin collection of the triple structure according to claim 1, wherein the bottom surface of the inner cylinder 100 is formed to be inclined upwardly from the side of the filter 120 to one side wall or radially inclined from the central axis to the side wall. , Dehydration and storage containers. According to claim 1 or 2, The filter 120 is a disk-shaped support (121) extending to the inner circumference of the inner cylinder (100); And a sieve or filter 122 covering the upper surface of the support, wherein the dehydration and water supply pipe 160 is formed through the center of the support 121 and the sieve or filter 122. Exchange resin collection, dehydration and storage containers. The triple structure of claim 1, further comprising a preliminary tube 180 protruding adjacent to the inlet / outlet tube 110 of the inner cylinder 100 to discharge the waste resin that is being stored. Waste ion exchange resin collection, dehydration and storage containers. The waste ion exchange resin collection, dehydration and storage container of claim 1, further comprising a decompression pump or an aspirator for dewatering water present between the resins. According to claim 1, wherein the vent 140 of the inner cylinder 100 is made to discharge only the internal air to the outside check valve (141) for blocking the inflow of external air and foreign matter; And waste ion exchange resin collection, dehydration and is equipped with a sieve or filter 142 that is mounted to the bottom of the check valve 141, but permits the discharge of air only, but the resin does not allow the passage thereof. Container. The method of claim 1, wherein the inner cylinder 100 is a collection, dehydration and storage container of the triple structure waste ion exchange resin, characterized in that molded in polyethylene, polyvinyl chloride or glass fiber reinforced plastic material. The method of claim 1, wherein the inner cylinder (100) is a waste ion exchange resin collection, dehydration and storage container of the triple structure, characterized in that molded in iron or stainless steel. 3. The waste ion exchange resin collection, dehydration and storage container of claim 1, wherein the buffer of the intermediate layer is filled with nonwoven fabric or dense fibers. 3. The waste ion exchange resin collection, dehydration and storage container according to claim 1, wherein the outer cylinder (200) is molded in a drum made of iron or stainless steel.

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