CN114300173A - Method for eliminating pollution by storing plastic-packaged nuclear wastewater on seabed for long time - Google Patents
Method for eliminating pollution by storing plastic-packaged nuclear wastewater on seabed for long time Download PDFInfo
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- CN114300173A CN114300173A CN202210068970.XA CN202210068970A CN114300173A CN 114300173 A CN114300173 A CN 114300173A CN 202210068970 A CN202210068970 A CN 202210068970A CN 114300173 A CN114300173 A CN 114300173A
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Abstract
The invention discloses a method for eliminating pollution by storing plastic-packaged nuclear wastewater on the seabed for a long time. The method comprises the following steps: 1) selecting a nuclear waste water storage sea area, wherein the seabed geological condition of the storage sea area is required to be relatively stable and the ocean current disturbance is small, so that the nuclear waste water can be conveniently stored for a long time; 2) transporting the nuclear wastewater to a selected sea area through a proper transport ship, and adjusting the density of the nuclear wastewater to be slightly greater than the density of seawater in the selected sea area; 3) the nuclear wastewater is filled into the special flexible plastic tube band → the seal → the reperfusion → the resealing … by the special equipment on the ship, and the bubbles need to be removed from the seal; 4) the plastic cylinder belt filled with nuclear waste water is sunk into the bottom of the fixed sea area, and the processes of filling, sealing, segmenting and shearing are in a continuous working state in the period.
Description
Technical Field
The invention belongs to a nuclear wastewater treatment method, and particularly relates to a method for eliminating pollution by storing plastic-packaged nuclear wastewater on the seabed for a long time.
Background
The wastewater of the nuclear power station mainly comprises main equipment and auxiliary equipment emptying water, reactor draining water, second loop wastewater, cleaning waste liquid, ion exchange device regeneration wastewater, special washing water and the like, and is mainly medium-low radioactive wastewater.
In 2011, 3.11 major earthquakes caused the power failure of the first nuclear power station in the fukushima due to seawater injection, and 3 of 4 nuclear reactors suffered from explosion and core burnout successively, so that catastrophic nuclear leakage was caused. The continuous cooling of the core and the inflow of rainwater and groundwater to the reactor facility generate a large amount of nuclear waste water, and is increasing.
The problem of treating nuclear sewage by adopting a mode of 'stopping and treating at the same time' is solved in Japan, on one hand, underground water drawing wells are arranged at the periphery of a nuclear power unit factory building, the inflow of underground water is reduced by adopting a stopping mode, meanwhile, multi-nuclide removing equipment is used for removing radioactive substances in the nuclear sewage, the treated water is called 'treated water', but the radioactive tritium in the nuclear sewage cannot be effectively removed by the multi-nuclide removing equipment. Tritium-containing contaminated water is stored in large tanks, reaching 123 million tons by 9 months in 2020.
Recently, it has been reported that, in our country, it is considered that it is cost-unacceptable to continue building a large tank for storing nuclear waste water, and it is planned to take a year to build a section of submarine tunnel and discharge the nuclear waste water to the seabed in a remote place through the tunnel.
Although the huge ocean can dilute the radioactive elements in the nuclear wastewater to a certain extent, if the radioactive elements are directly discharged into the ocean, firstly, the radioactive elements are continuously accumulated in marine organisms, and the marine organisms for human beings to salvage and eat are also continuously accumulated in human bodies to cause harm to the human bodies. Secondly, the drinking water is polluted, and further, the soil and land animals and plants are polluted. Once disposed of improperly, it is likely to be a significant environmental and biological hazard.
Disclosure of Invention
The invention provides a method for eliminating pollution by storing plastic-packaged nuclear wastewater in seabed for a long time, and aims to solve the problem that the nuclear wastewater is difficult to store on land for a long time at present.
Therefore, the invention adopts the following technical scheme:
a method for eliminating pollution by storing plastic-packaged nuclear wastewater on the seabed for a long time comprises the following steps:
1) selecting a nuclear waste water storage sea area, wherein the sea floor of the storage sea area is required to be calm, and the disturbance of ocean current is small; the geology of the storage sea area is stable, and geological activity active areas such as a submarine seismic zone, a volcano active area and the like are avoided; the nuclear wastewater is convenient to store for a long time;
2) loading the nuclear wastewater onto a transport ship, adjusting the density of the nuclear wastewater to be greater than that of seawater in a storage area, so that the nuclear wastewater can conveniently sink into the sea bottom, and transporting the nuclear wastewater to the storage sea area by the transport ship;
3) loading nuclear wastewater into a flexible plastic barrel belt through conveying equipment on a transport ship, sealing two ends of the flexible plastic barrel belt, and discharging bubbles in the flexible plastic barrel belt when the flexible plastic barrel belt is sealed;
4) the flexible plastic tubular belt filled with nuclear waste water is submerged into the sea floor of the storage sea area.
Further, in the step 3), the nuclear waste water is continuously filled into the flexible plastic cylinder belt, the middle part of the flexible plastic cylinder belt is sealed and fixed at intervals, the flexible plastic cylinder belt is divided into a plurality of storage sections, the nuclear waste water is filled into each storage section, and the nuclear waste water in the adjacent storage sections is separated.
Furthermore, a winding drum device and a plastic package assembly are arranged on the transport ship, the winding drum device is used for placing the flexible plastic drum belt, and the plastic package assembly is used for carrying out plastic package fixing on the flexible plastic drum belt; when the nuclear waste water is loaded into the flexible plastic barrel band, the flexible plastic barrel band is continuously transferred by the barrel device, and the flexible plastic barrel band filled with the nuclear waste water is subjected to plastic packaging fixation at intervals of the plastic packaging assembly to form a storage section.
Further, in the step 3), the flexible plastic cylinder belt filled with the nuclear waste water is soaked in seawater.
Further, the flexible plastic cylindrical belt is preferably made of seawater corrosion resistant plastic.
Furthermore, the flexible plastic cylinder belt is made of PVDF or PPS plastic.
Nuclear sewage contains a large number of radioactive elements, of which tritium is the highest, and secondly several radioactive elements known to be potentially harmful to living beings are cobalt-60, carbon-14 and strontium-90. The nucleus of tritium consists of a proton and two neutrons, is radioactive, and undergoes beta decay with a half-life of 12.43 years.
As is known, rivers, lakes and seas have certain self-cleaning capability, and nuclear wastewater is stored to a deep and relatively calm seabed to avoid marine fishes. After long-term storage, radioactive elements in the nuclear wastewater are decayed, and the radioactivity is gradually reduced until the radioactive elements are reduced to a safe range, so that the marine environment is not seriously affected.
The invention has the beneficial effects that:
1. the nuclear wastewater is sunk to the seabed through the scheme and is contained in the flexible plastic cylinder belt, so that the nuclear wastewater is isolated from seawater, and the nuclear wastewater cannot leak into the seawater; the seawater pressure is balanced with the water pressure of the nuclear wastewater in the flexible plastic cylinder belt, so that the flexible plastic cylinder belt can be stored in the seabed for a long time, the radioactivity in the nuclear wastewater is reduced to a safe range through long-term storage, and the problem that the nuclear wastewater is difficult to store is solved;
2. the middle part of the flexible plastic cylinder belt is fixed in a plastic package way, the flexible plastic cylinder belt is divided into a plurality of storage sections, and nuclear wastewater is not communicated among the storage sections; if a certain position of the flexible plastic cylinder belt is broken, only the nuclear wastewater in the storage section is leaked, so that the nuclear wastewater in the whole flexible plastic cylinder belt cannot be completely leaked, the harm of nuclear wastewater leakage is reduced, the risk is lower, and the safety is higher;
3. the nuclear waste water stored on land needs to be built with a large number of metal storage tanks, occupies a large land area, needs to be maintained by workers for a long time, and has higher cost; the metal storage tank is blown by wind and drenched for a long time, so that the risk of nuclear waste water leakage caused by breakage exists; after the nuclear wastewater is sunk to the seabed by the method, subsequent treatment is not needed, the cost is lower, the safety is higher, the treatment quantity of the nuclear wastewater is not limited, and a large amount of nuclear wastewater is convenient to treat;
4. the flexible plastic cylinder belt is made of corrosion-resistant plastic, can resist the corrosion of seawater and nuclear wastewater, and meets the requirement of long-term storage of the nuclear wastewater in the seabed.
Detailed Description
The invention will be further illustrated with reference to specific examples:
a method for eliminating pollution by storing plastic-packaged nuclear wastewater on the seabed for a long time comprises the following steps:
1) the method is characterized in that a sea area for storing pretreated low-radioactive nuclear wastewater and nuclear wastewater is selected, geological activities of the sea area are required to be relatively calm, the nuclear wastewater is convenient to store for a long time due to small ocean current disturbance, a structure of a sea basin can be preferentially selected, and ocean currents at the bottom of the sea basin are relatively stable.
2) The nuclear wastewater is loaded onto a transport ship, salt substances are added into the nuclear wastewater, the density of the nuclear wastewater is adjusted to be larger than that of seawater in a storage area, the nuclear wastewater is convenient to sink into the sea bottom, and the transport ship transports the nuclear wastewater to the storage sea area. The transport ship selects a large ship with ocean-going capacity, has high loading capacity, can load tens of thousands of tons of nuclear wastewater once going out of the sea, and is convenient for improving the operation efficiency.
3) The carrier is provided with a winding drum device and a plastic package assembly, the flexible plastic drum belt is coiled into a drum shape and placed on the winding drum device, the winding drum device is used for storing and placing the flexible plastic drum belt, and the plastic package assembly is used for carrying out plastic package fixing on the flexible plastic drum belt. When the nuclear waste water is loaded into the flexible plastic barrel band, the flexible plastic barrel band is continuously transferred by the barrel device, and bubbles in the flexible plastic barrel band need to be discharged when the flexible plastic barrel band is sealed, so that the flexible plastic barrel band is prevented from being broken due to overlarge seabed pressure.
The flexible plastic cylinder belt is continuously filled with nuclear wastewater, the middle part of the flexible plastic cylinder belt is fixed in a plastic package mode at intervals, and the flexible plastic cylinder belt is divided into a plurality of storage sections. The nuclear waste water is filled in each storage section, and the nuclear waste water in the adjacent storage sections is separated.
In order to store the nuclear waste water in the seabed for a long time, the flexible plastic barrel belt is made of seawater corrosion resistant plastic, preferably PVDF or PPS plastic.
When the technical requirement is necessary, the flexible cylinder belt can adopt a 'corrugated pipe' technology, so that certain 'structural rigidity' is added, and the nuclear waste water is still difficult to flow out even if the cylinder belt is accidentally locally broken.
4) The flexible plastic tubular belt filled with nuclear waste water is submerged into the sea floor of the storage sea area.
In order to facilitate observation of the sinking of the nuclear waste water, the nuclear waste water can be dyed, preferably red or yellow, and can be distinguished from seawater. And the sinking condition of the nuclear wastewater can be observed through a manned or unmanned deep sea submersible.
The flexible plastic cylindrical belt on the market has a width of more than 16 meters with a folding diameter, and if the width is calculated by the folding diameter of 16 meters, the cross-sectional area of the flexible plastic cylindrical belt filled with water is as follows:
S=3.14×（16m×2÷3.14÷2）2≈82m2
i.e. 8200m can be stored per 100 m length of flexible plastic cartridge3The nuclear waste water of (1). 200 flexible plastic cylinders of the type can store 164 ten thousand tons of nuclear waste water according to the calculation. Taking the nuclear accident of fukushima, japan as an example, about 124 million tons of nuclear waste water is stored in total, and about 180 tons of nuclear waste water is generated every day, so that putting 200 pieces of the flexible plastic tube can theoretically solve the problem.
Claims (6)
1. A method for eliminating pollution by storing plastic-packaged nuclear wastewater on the seabed for a long time is characterized by comprising the following steps:
1) selecting a nuclear waste water storage sea area, wherein the seabed geological condition of the storage sea area is required to be relatively stable and the ocean current disturbance is small, so that the nuclear waste water can be conveniently stored for a long time;
2) loading the nuclear wastewater onto a transport ship, adjusting the density of the nuclear wastewater to be greater than that of seawater in a storage area, so that the nuclear wastewater can conveniently sink into the sea bottom, and transporting the nuclear wastewater to the storage sea area by the transport ship;
3) loading nuclear wastewater into a flexible plastic barrel belt through conveying equipment on a transport ship, sealing two ends of the flexible plastic barrel belt, and discharging bubbles in the flexible plastic barrel belt when the flexible plastic barrel belt is sealed;
4) the flexible plastic tubular belt filled with nuclear waste water is submerged into the sea floor of the storage sea area.
2. The method for deep-sea storage of wastewater according to claim 1, wherein in step 3), the flexible plastic tube is filled with nuclear wastewater continuously, the middle part of the flexible plastic tube is fixed with a seal at intervals, the flexible plastic tube is divided into a plurality of storage sections, each storage section is filled with nuclear wastewater, and the nuclear wastewater in the adjacent storage sections is separated.
3. The method for the deep-sea long-term storage of the wastewater as claimed in claim 2, wherein a reel device and a plastic package assembly are arranged on the transport ship, the reel device is used for placing the flexible plastic reel belt, and the plastic package assembly is used for carrying out plastic package fixation on the flexible plastic reel belt; when the nuclear waste water is loaded into the flexible plastic barrel band, the flexible plastic barrel band is continuously transferred by the barrel device, and the flexible plastic barrel band filled with the nuclear waste water is subjected to plastic packaging fixation at intervals of the plastic packaging assembly to form a storage section.
4. The method for long-term storage of wastewater in the open sea according to claim 2, wherein in step 3), the flexible plastic tube filled with nuclear wastewater is immersed in seawater.
5. The method of claim 1, wherein the flexible plastic tubular strip is preferably a seawater corrosion resistant plastic.
6. The method for the long-term storage of wastewater in the open sea according to claim 5, wherein the flexible plastic tube is made of PVDF or PPS plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210068970.XA CN114300173A (en) | 2022-01-21 | 2022-01-21 | Method for eliminating pollution by storing plastic-packaged nuclear wastewater on seabed for long time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210068970.XA CN114300173A (en) | 2022-01-21 | 2022-01-21 | Method for eliminating pollution by storing plastic-packaged nuclear wastewater on seabed for long time |
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| Publication Number | Publication Date |
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| CN114300173A true CN114300173A (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210068970.XA Pending CN114300173A (en) | 2022-01-21 | 2022-01-21 | Method for eliminating pollution by storing plastic-packaged nuclear wastewater on seabed for long time |
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| CN (1) | CN114300173A (en) |
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- 2022-01-21 CN CN202210068970.XA patent/CN114300173A/en active Pending
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