CN210692108U - Circulating cooling system of spent fuel transfer container of million-kilowatt nuclear power plant - Google Patents
Circulating cooling system of spent fuel transfer container of million-kilowatt nuclear power plant Download PDFInfo
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- CN210692108U CN210692108U CN201921438388.8U CN201921438388U CN210692108U CN 210692108 U CN210692108 U CN 210692108U CN 201921438388 U CN201921438388 U CN 201921438388U CN 210692108 U CN210692108 U CN 210692108U
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Abstract
The utility model belongs to the technical field of nuclear power station nuclear auxiliary system, especially, relate to a million kilowatt level nuclear power plant spent fuel transportation container's circulative cooling system, the utility model discloses a million kilowatt level nuclear power plant spent fuel transportation container's circulative cooling system, when carrying out the gas charging operation, outside compressed air device provides the air supply, and the tee bend ball valve that shields filter equipment at this moment communicates with high efficiency filter, after filtering through high efficiency filter, flows to the cooling device of unloading and filters waste gas secondary and cooling discharge; when the water filling operation is carried out, the three-way ball valve is firstly communicated with the high-efficiency filter, boron water is injected to cool the spent fuel transfer container, and when the liquid level in the liquid level switch box reaches a trigger point, the three-way ball valve is communicated with the water filtering component; when circulation is filled water cooling operation, tee bend ball valve and drainage subassembly intercommunication continue to provide boron water and transport the container to the spent fuel and cool down for the stable temperature of predetermineeing of reaching of inner chamber is convenient for follow-up unloading and is demolishd enclosing cover etc..
Description
Technical Field
The utility model belongs to the technical field of the nuclear auxiliary system of nuclear power station, especially, relate to a million kilowatt nuclear power plant spent fuel transports circulative cooling system of container.
Background
Spent fuel is a nuclear fuel that has been irradiated with radiation and used, and is produced by a nuclear reactor in a nuclear power plant. Nuclear fuel after nuclear reactor reactions contains a large amount of radioactive elements and therefore has a large amount of radioactivity, which, if not properly disposed of, can seriously affect the environment and the health of the personnel in contact with them. Along with the service time of the nuclear power unit is prolonged, the spent fuel assemblies generated by operation are accumulated year by year and approach to reach the design capacity of a spent fuel pool, and the spent fuel is transported out of the spent fuel pool by considering the use of a transport container. After the spent fuel transportation container is filled, helium is required to be filled into the container to establish thermal balance between a spent fuel assembly cladding and a cavity, the maximum temperature of a spent fuel assembly in the transportation container reaches 273 ℃, the average temperature of helium in the cavity is about 200 ℃ and the temperature of a container shell exceeds 85 ℃ after the spent fuel is fully loaded to reach a thermal balance state. Before the unloading operation, the inner cavity of the container needs to be filled with water and exhausted, and cooling circulation is carried out simultaneously, so that the temperature of the outer surface of the spent fuel transport container is lower than 35 ℃, and a series of operations such as unloading and outer cover removal are facilitated.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a million kilowatt level nuclear power plant spent fuel transports circulative cooling system of container aims at solving the spent fuel among the prior art and need cool down so that unload and demolish the technical problem of enclosing cover.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a million kilowatt-level nuclear power plant spent fuel transports circulative cooling system of container for transport the container cooling to spent fuel, including the multi-functional rack, the cooling device of unloading and the shielding filter equipment that communicate in proper order, shielding filter assembly includes the base, locates liquid level switch box, three-way ball valve, high efficiency filter, water filtering component on the base, liquid level switch box with the entry intercommunication of three-way ball valve, high efficiency filter one end with an export intercommunication of three-way ball valve, high efficiency filter's the other end with the cooling device intercommunication of unloading, water filtering component with another export intercommunication of three-way ball valve, spent fuel transport container one end with the cooling device intercommunication of unloading, the other end with liquid level switch box intercommunication.
Furthermore, the water filtering component comprises a filtering pressure reducing valve, a diaphragm valve, a water filter and a pneumatic heat insulation pump which are sequentially communicated, and the filtering pressure reducing valve is communicated with the other outlet of the three-way ball valve.
Furthermore, a bimetallic thermometer used for detecting the temperature of the liquid flowing out of the liquid level switch box is arranged between the three-way ball valve and the liquid level switch box.
Further, the circulating cooling system of the spent fuel transfer container of the million kilowatt nuclear power plant further comprises an ice storage tank communicated with the unloading cooling module.
Further, the multifunctional rack comprises a rack water branch and a rack gas branch, and the rack water branch and the rack gas branch are respectively communicated with the discharging and cooling device.
Further, the multifunctional rack further comprises an exhaust gas discharge branch, and the exhaust gas discharge branch is communicated with the discharging cooling device.
Further, the side end of the multifunctional rack is provided with a lifting lug convenient to move.
Furthermore, the multifunctional rack, the discharging cooling device and the shielding and filtering device are all provided with lead protection layers with the thickness of more than 30 mm.
Further, the circulative cooling system of container is transported to million kilowatt level nuclear power plant spent fuel still includes the canning pond that is equipped with the boron water, in the canning pond with multi-functional rack passes through the pipe and switches on.
Further, still be equipped with large-traffic immersible pump in the tank filling pond, just large-traffic immersible pump during operation can drive all the boron water misce bene.
The utility model has the advantages that: the utility model discloses a million kilowatt level nuclear power plant spent fuel transportation container's circulative cooling system, because it has multi-functional rack, the cooling device of unloading, spent fuel transportation container and shielding filter equipment to communicate in proper order, so, just can aerify and fill water operation to spent fuel transportation container's inner chamber, specifically, when aerifing the operation, outside compressed air device provides the air supply, and flow through multi-functional rack, the cooling device of unloading, spent fuel transportation container and shielding filter equipment in proper order, shielding filter equipment's tee bend ball valve and high efficiency filter intercommunication this moment, after high efficiency filter filters, flow to the cooling device of unloading again and discharge the waste gas secondary filtration and cooling; when the water filling operation is carried out, the three-way ball valve is firstly communicated with the high-efficiency filter, boron water is injected, the boron water flows into a circulating cooling system of the spent fuel transfer container of the million kilowatt nuclear power plant to cool the spent fuel transfer container, when the liquid level in the liquid level switch box reaches a trigger point, the three-way ball valve is communicated with the water filtering component, and wastewater flows back; when the circulation is filled with water and is cooled, the three-way ball valve is communicated with the water filtering component, and boron water flows through a circulation cooling system of the spent fuel transfer container of the million kilowatt nuclear power plant to cool the spent fuel transfer container, so that the inner cavity reaches a preset temperature stably, and a series of operations such as subsequent unloading and outer cover removal are facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic structural diagram of a circulation cooling system of a spent fuel transfer container in a million kilowatt nuclear power plant according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a shielding filter device according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
10-spent fuel transfer vessel; 20-a discharge cooling device;
30-a shielded filter device; 31-liquid level switch box; 32-three-way ball valve;
33-a high efficiency filter; 34-a water filtering component; 341-filter pressure reducing valve;
342-a diaphragm valve; 343-a water filter; 344-pneumatic heat insulation pump;
35-bimetallic thermometer; 36-a base; and 40, an ice storage pool.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-2 are exemplary and intended to be used to illustrate the invention, but should not be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
As shown in fig. 1-2, the embodiment of the utility model provides a circulation cooling system of container 10 is transported to million kilowatt level nuclear power plant spent fuel, be used for transporting container 10 cooling to spent fuel, including the multi-functional rack that communicates in proper order, unload cooling device 20 and shielding filter equipment 30, shielding filter equipment includes base 36, locate liquid level switch box 31 on the base 36, three-way ball valve 32, high efficiency filter 33, water filtering component 34, liquid level switch box 31 communicates with three-way ball valve 32's entry, high efficiency filter 33 one end communicates with an export of three-way ball valve 32, high efficiency filter 33's the other end and the cooling device 20 intercommunication of unloading, water filtering component 34 communicates with another export of three-way ball valve 32, spent fuel transports container 10 one end and the cooling device 20 intercommunication of unloading, the other end communicates with liquid level switch box 31.
The utility model discloses million kilowatt level nuclear power plant spent fuel transportation container 10's circulative cooling system, owing to communicate in proper order has multi-functional rack, the cooling device 20 of unloading, spent fuel transportation container 10 and shielding filter device 30, so, just can aerify and fill water operation to the inner chamber of spent fuel transportation container 10, specifically, when aerifing the operation, outside compressed air device provides the air supply, and flow through multi-functional rack, the cooling device 20 of unloading, spent fuel transportation container 10 and shielding filter device 30 in proper order, shielding filter device 30's tee bend ball valve 32 and high efficiency filter 33 intercommunication this moment, after high efficiency filter 33 filters, flow to the cooling device 20 of unloading again and discharge the waste gas secondary filtration and cooling; when the water filling operation is performed, the three-way ball valve 32 is firstly communicated with the high-efficiency filter 33, boron water is injected, the boron water flows into a circulating cooling system of the spent fuel transport container 10 of the million kilowatt nuclear power plant to cool the spent fuel transport container 10, when the liquid level in the liquid level switch box 31 reaches a trigger point, the three-way ball valve 32 is communicated with the water filtering component 34, and wastewater flows back; when the circulation water filling cooling operation is performed, the three-way ball valve 32 is communicated with the water filtering component 34, and boron water flows through a circulation cooling system of the spent fuel transportation container 10 of the million kilowatt nuclear power plant to cool the spent fuel transportation container 10.
Further, in the present embodiment, as shown in fig. 1, the water filtering assembly 34 includes a filtering and pressure reducing valve 341, a membrane valve 342, a water filter 343 and a pneumatic heat insulation pump 344 which are sequentially communicated, wherein the filtering and pressure reducing valve 341 is communicated with the other outlet of the three-way ball valve 32. The decompression filter valve can effectively filter the compressed air flowing through the spent fuel transfer container 10 and perform pressure regulation on the compressed air.
Further, in the present embodiment, as shown in fig. 1, a bimetal thermometer 35 for detecting the temperature of the liquid flowing out from the liquid level switch box 31 is provided between the three-way ball valve 32 and the liquid level switch box 31. By monitoring the temperature of the water coming out of the spent fuel transport container, the flow and time of the inflation or water filling can be adjusted in a targeted manner according to the temperature displayed on the thermometer at any time.
Further, in the embodiment, as shown in fig. 1, the circulation cooling system of the spent fuel transfer container 10 of the million kilowatt nuclear power plant further comprises an ice storage tank communicated with the unloading cooling module. The ice blocks are conveyed from the ice storage pool 40 to the discharge cooling device 20, and then the discharge cooling device 20 transfers the ice blocks to the inner cavity of the spent fuel transfer container 10, and the spent fuel transfer container 10 is cooled by the ice blocks. Specifically, the water temperature at the water outlet of the spent fuel transfer container 10 is detected, and if the water outlet is higher than 40 ℃, or higher than 35 ℃ and lower than 40 ℃ but the inner cover bolt cannot be opened, 2m of water is injected into the spent fuel transfer container 103And (4) cooling by continuously supplementing boron water, and stopping cooling when the water temperature at the water outlet is 35 ℃.
Further, in the present embodiment, as shown in fig. 1, the multifunctional platform includes a platform water branch and a platform gas branch, and the platform water branch and the platform gas branch are respectively communicated with the discharging cooling device 20. Specifically, during inflation operation, an external compressed air device communicates with the gantry gas branch and draws air from the gantry gas branchThe path is guided to a discharging cooling device 20, the air is continuously blown to the spent fuel transfer container 10 by a compressed air device for more than 30min, and the air pressure is 0.2 MPa. Leading cooling filtration carries out, leads to the spent fuel transportation container 10 via the cooling device 20 of unloading again to the realization is to the cooling of spent fuel transportation container 10. When the water filling operation is carried out, the circulating cooling system of the spent fuel transferring container 10 of the million kilowatt nuclear power plant further comprises a tank containing boron water, the tank is communicated with the multifunctional rack through a guide pipe to provide a submersible pump connected with a water branch of the rack, the submersible pump is firstly placed into a container containing desalted water, and 1m of water is injected into the spent fuel transferring container 10 through the submersible pump3The submersible pump is put into a tank filling pool filled with boron water, and the flow rate of the boron water is 5.6m3/h。
Further, in the present embodiment, as shown in fig. 1, the multi-function rack further includes an exhaust gas discharge branch, which communicates with the discharge cooling device 20. Specifically, after the exhaust gas is subjected to the double cooling and filtering by the high efficiency filter 33 and the discharge cooling device 20, the exhaust gas may be discharged into the duct of the nuclear fuel ventilation system for subsequent reprocessing.
Further, in the present embodiment, as shown in fig. 1, the side end of the multi-function stand is provided with a lifting lug for easy movement. Through setting up the lug, be convenient for remove multi-functional rack. The bottom of the barrier filter 30 is provided with a moving chassis so that the barrier filter 30 can be dragged or moved by a forklift.
Further, in the present embodiment, as shown in fig. 1, the outer sides of the multifunctional rack, the discharging cooling device 20 and the shielding and filtering device 30 are all provided with lead protection layers with a thickness of more than 30 mm. Through setting up the lead protection layer that thickness is greater than 30mm for prevent the radiation leakage, and can effectively ensure operating personnel's safety.
Further, in this embodiment, as shown in fig. 1, a large-flow submersible pump is further disposed in the tank filling tank, and the large-flow submersible pump can drive all the boron water to be uniformly mixed when working. Continuously filling boron water into the spent fuel transport container 10 by using a submersible pump, stirring the canning pool filled with the boron water by using a high-flow submersible pump, detecting the radioactive value of the boron water in the canning pool after running for 8 hours,
the above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A circulative cooling system of a million kilowatt nuclear power plant spent fuel transfer container is used for cooling the spent fuel transfer container, and is characterized in that: including the multi-functional rack that communicates in proper order, cooling device and shielding filter equipment of unloading, shielding filter assembly includes the base, locates liquid level switch box, three-way ball valve, high efficiency filter, drainage subassembly on the base, liquid level switch box with the entry intercommunication of three-way ball valve, high efficiency filter one end with an export intercommunication of three-way ball valve, high efficiency filter's the other end with the cooling device intercommunication of unloading, drainage subassembly with another export intercommunication of three-way ball valve, the spentnuclear fuel transport container one end with the cooling device intercommunication of unloading, the other end with liquid level switch box intercommunication.
2. The circulating cooling system of the transferring container of the spent fuel of the million kilowatt nuclear power plant according to claim 1, characterized in that: the water filtering component comprises a filtering pressure reducing valve, a diaphragm valve, a water filter and a pneumatic heat insulation pump which are sequentially communicated, and the filtering pressure reducing valve is communicated with the other outlet of the three-way ball valve.
3. The circulating cooling system of the transferring container of the spent fuel of the million kilowatt nuclear power plant according to claim 2, characterized in that: and a bimetallic thermometer used for detecting the temperature of the liquid flowing out of the liquid level switch box is arranged between the three-way ball valve and the liquid level switch box.
4. The circulating cooling system of the transferring container of the spent fuel of the million kilowatt nuclear power plant according to claim 1, characterized in that: the circulating cooling system of the spent fuel transfer container of the million-kilowatt nuclear power plant further comprises an ice storage tank communicated with the unloading cooling module.
5. The circulating cooling system of the transferring container of the spent fuel of the million kilowatt nuclear power plant according to claim 1, characterized in that: the multifunctional rack comprises a rack water branch and a rack gas branch, and the rack water branch and the rack gas branch are respectively communicated with the discharging and cooling device.
6. The circulating cooling system of the transferring container of the spent fuel of the million kilowatt nuclear power plant according to claim 5, characterized in that: the multifunctional rack further comprises an exhaust gas discharge branch, and the exhaust gas discharge branch is communicated with the discharging cooling device.
7. The circulating cooling system of the transferring container of the spent fuel of the million kilowatt nuclear power plant according to claim 5, characterized in that: the side of multi-functional rack is provided with the lug of being convenient for remove.
8. The circulating cooling system of the transferring container of the spent fuel of the million kilowatt nuclear power plant according to claim 1, characterized in that: the multifunctional rack, the discharging cooling device and the shielding and filtering device are all provided with lead protection layers with the thickness larger than 30 mm.
9. The circulating cooling system of the transferring container of the spent fuel of the million kilowatt nuclear power plant according to claim 1, characterized in that: the circulative cooling system of container is transported to million kilowatt level nuclear power plant spent fuel still includes the canning pond that is equipped with the boric water, in the canning pond with multi-functional rack passes through the pipe and switches on.
10. The circulating cooling system for the transferring container of the spent fuel of the million kilowatt nuclear power plant according to claim 9, is characterized in that: still be equipped with large-traffic immersible pump in the tank filling pond, just large-traffic immersible pump during operation can drive all the boron water misce bene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921438388.8U CN210692108U (en) | 2019-08-30 | 2019-08-30 | Circulating cooling system of spent fuel transfer container of million-kilowatt nuclear power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921438388.8U CN210692108U (en) | 2019-08-30 | 2019-08-30 | Circulating cooling system of spent fuel transfer container of million-kilowatt nuclear power plant |
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| CN210692108U true CN210692108U (en) | 2020-06-05 |
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| CN201921438388.8U Active CN210692108U (en) | 2019-08-30 | 2019-08-30 | Circulating cooling system of spent fuel transfer container of million-kilowatt nuclear power plant |
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