CN117030592B - Storage tank corrosion detection device and radioactive feed liquid storage system - Google Patents
Storage tank corrosion detection device and radioactive feed liquid storage system Download PDFInfo
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- CN117030592B CN117030592B CN202311256218.9A CN202311256218A CN117030592B CN 117030592 B CN117030592 B CN 117030592B CN 202311256218 A CN202311256218 A CN 202311256218A CN 117030592 B CN117030592 B CN 117030592B
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- 238000001514 detection method Methods 0.000 title claims abstract description 216
- 239000007788 liquid Substances 0.000 title claims abstract description 205
- 238000003860 storage Methods 0.000 title claims abstract description 138
- 230000007797 corrosion Effects 0.000 title claims abstract description 108
- 238000005260 corrosion Methods 0.000 title claims abstract description 108
- 230000002285 radioactive effect Effects 0.000 title claims description 40
- 238000007789 sealing Methods 0.000 claims description 35
- 238000003466 welding Methods 0.000 claims description 23
- 239000000443 aerosol Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 230000001502 supplementing effect Effects 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 5
- 239000012780 transparent material Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 22
- 239000000523 sample Substances 0.000 description 4
- 230000005855 radiation Effects 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 238000011897 real-time detection Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/48—Arrangements of indicating or measuring devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/08—Detecting presence of flaws or irregularities
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/20—Disposal of liquid waste
- G21F9/22—Disposal of liquid waste by storage in a tank or other container
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a storage tank corrosion detection device, which comprises a first detection pipe, an indication liquid tank and a detection assembly, wherein one end of the first detection pipe is sealed, the sealed end is consistent with the corrosion resistance of a storage tank and penetrates into the storage tank and is positioned below the liquid level of feed liquid, the other end of the first detection pipe is opened, the open end penetrates into the indication liquid tank and is positioned below the liquid level of the indication liquid, the interior of the first detection pipe is filled with set gas, the set gas comprises gas which is dissolved in the feed liquid but not dissolved in the indication liquid, the set gas is used for generating negative pressure in the first detection pipe after the sealed end is broken so as to change the liquid level of the indication liquid, and the detection assembly is used for detecting the position of the liquid level of the indication liquid and giving an alarm when the liquid level of the indication liquid changes so as to prompt the storage tank to reach the upper limit of designed corrosion allowance. The storage tank corrosion detection device can feed back whether the storage tank reaches the use limit in real time, and can avoid the influence of feed liquid on a detection component, so that the storage safety is improved.
Description
Technical Field
The invention particularly relates to a storage tank corrosion detection device and a radioactive feed liquid storage system.
Background
The radioactive feed liquid is more acidic, can cause corrosion to feed liquid storage equipment such as a storage tank, the storage equipment has damage leakage risks through long-term corrosion of feed liquid, especially when encountering natural disasters such as earthquakes, tsunamis and the like, the damage risks are more serious due to corrosion, and the events of feed liquid overflow caused by storage tank leakage failure can not only generate high maintenance cost, pollution treatment cost, but also increase personnel's exposure risks, thereby bringing great adverse effects in the aspects of safety, economy and the like. Therefore, the method has important significance in detecting the corrosion condition of the radioactive feed liquid storage tank.
The traditional ultrasonic diffraction time difference detection, phased array longitudinal wave straight probe detection, high-frequency guided wave detection and other equipment nondestructive corrosion detection means are adopted, the detection devices are all required to be placed in the equipment room with the same high radioactivity as the radioactive feed liquid storage tank, however, because the feed liquid has certain radioactivity, the electronic device is extremely fragile in a high-radioactivity environment, and the electronic device is inconvenient to maintain after being damaged. The prior storage tank can only detect corrosion resistance before being put into use, and is difficult to directly detect the storage tank condition after being put into use, so that the storage tank is difficult to replace in time after reaching a certain corrosion degree, and a certain leakage risk exists.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and provides a storage tank corrosion detection device which can feed back whether a storage tank reaches a use limit in real time and avoid the influence of feed liquid on a detection component so as to improve storage safety.
The invention provides a storage tank corrosion detection device, which comprises a first detection pipe, an indication liquid tank and a detection assembly, wherein the storage tank is positioned in an equipment room and used for storing feed liquid, the indication liquid tank is positioned outside the equipment room where the storage tank is positioned and used for storing the indication liquid, one end of the first detection pipe is sealed, the sealed end is consistent with corrosion resistance of the storage tank and penetrates into the storage tank and is positioned below the liquid level of the feed liquid, the other end of the first detection pipe is opened, the open end penetrates into the indication liquid tank and is positioned below the liquid level of the indication liquid, the interior of the first detection pipe is filled with set gas, the set gas comprises gas which is dissolved in the feed liquid but not dissolved in the indication liquid and is used for generating negative pressure in the first detection pipe after the sealed end is broken so as to enable the liquid level of the indication liquid to change, and the detection assembly is used for detecting the position of the liquid level of the indication liquid and giving an alarm when the liquid level of the indication liquid changes so as to prompt the storage tank to reach the upper limit of designed corrosion allowance.
Preferably, the detection assembly comprises a controller and a first detection unit, the first detection unit comprises a liquid level detection piece, a first alarm and a second alarm, the liquid level detection piece is electrically connected with the controller and is used for detecting the liquid level position of the indication liquid, sending a first signal to the controller when the liquid level position of the indication liquid is lower than a first set value and not lower than a second set value, and sending a second signal to the controller when the liquid level position of the indication liquid is lower than the second set value, and the second set value is lower than the first set value; the controller is electrically connected with the first alarm and the second alarm respectively and is used for controlling the first alarm to send out a liquid supplementing alarm according to the first signal so as to prompt the supplementing of the indication liquid, and controlling the second alarm to send out a breaking alarm according to the second signal so as to prompt the sealing end of the first detection tube to break, and the storage tank reaches the upper limit of the designed corrosion allowance.
Preferably, a first stop valve is arranged on the pipe body of the first detection pipe and is electrically connected with the controller, and the controller is further used for controlling the first stop valve to switch off the first detection pipe according to the second signal.
Preferably, the corrosion detection device of the storage tank further comprises a detection tank and a second detection pipe, wherein the detection tank is positioned outside the equipment room where the storage tank is positioned, one end of the second detection pipe is sealed, the sealed end is consistent with the corrosion resistance of the storage tank and penetrates into the storage tank and is positioned below the liquid level of the feed liquid,
preferably, the other end of the second detecting tube is opened, the opening end is communicated with the detecting groove, the detecting assembly is further used for detecting the gas component in the detecting groove, and an alarm is sent out when the gas component in the detecting groove contains the set characteristic so as to prompt the storage tank to reach the upper limit of the designed corrosion allowance.
Preferably, the feed liquid is a radioactive feed liquid, the detection assembly further comprises a second detection unit, the second detection unit comprises a radioactive aerosol detection piece and a third alarm, the radioactive aerosol detection piece is electrically connected with the controller and used for detecting gas components in the detection tank, when radioactivity occurs in the gas components in the detection tank, a third signal is sent to the controller, the controller is electrically connected with the third alarm and used for controlling the third alarm to send a bursting alarm according to the third signal so as to prompt the second detection pipe to be broken at the sealing end, and the storage tank reaches the upper limit of the designed corrosion allowance.
Preferably, a second stop valve is arranged on the pipe body of the second detection pipe, the second stop valve is electrically connected with the controller, and the controller is further used for controlling the second stop valve to switch off the second detection pipe according to a third signal.
Preferably, the sealing end of the first detection tube/the second detection tube is made of a material consistent with that of the storage tank, the thickness of the tube wall of the sealing end is consistent with the design corrosion allowance of the storage tank, a welding line is arranged at the sealing position of the sealing end of the first detection tube/the second detection tube, and the welding line is consistent with the main body welding line of the storage tank in a welding mode.
Preferably, the inner diameter of the end of the sealing end of the first detection tube/the second detection tube is gradually enlarged to form a small chamber, so that the feed liquid can enter the small chamber after the first detection tube/the second detection tube is broken, and a welding seam at the sealing end of the first detection tube/the second detection tube is arranged on the small chamber.
Preferably, the opening end of the first detecting tube is made of transparent materials and is used for observing the position of the liquid level of the indication liquid in the first detecting tube.
The invention also provides a radioactive feed liquid storage system, which comprises a storage tank, a first equipment room and a second equipment room, wherein the storage tank corrosion detection device is arranged in the first equipment room, feed liquid stored in the storage tank is radioactive feed liquid, an indication liquid tank and a detection component of the storage tank corrosion detection device are arranged in the second equipment room, and the storage tank corrosion detection device is used for detecting whether the storage tank reaches the upper limit of a designed corrosion allowance or not.
The invention provides a storage tank corrosion detection device, by setting the sealing end of a first detection pipe to be consistent with the corrosion resistance of a storage tank, the sealing end is taken as a sample of the storage tank and is placed in the same environment as the storage tank, so that the corrosion degree of the sealing end and the storage tank is always the same. Once the storage tank reaches the upper limit of the designed corrosion allowance, the sealing end is broken along with the corrosion allowance, so that gas in the first detection pipe is dissolved in feed liquid, the air pressure in the first detection pipe is reduced along with the corrosion allowance, the liquid level in the opening end is increased due to negative pressure, the liquid level in the communicated indication liquid tank is reduced, and the corrosion condition of the storage tank can be fed back by utilizing the change.
Compared with the traditional corrosion resistance detection mode, the detection device can avoid the situation that the storage tank reaches the corrosion allowance in advance caused by deviation of storage tank and corrosion resistance test data due to specific conditions, and the like, and can feed back the result through the first detection pipe immediately after the upper limit of the corrosion allowance is reached, so that the safety of the storage tank in use is ensured, the leakage risk of feed liquid is reduced, and the detection device can be used in the storage field of radioactive feed liquid.
And the open end of the first detection tube, the detection assembly and the like can be arranged outside the storage tank area, the limitation of the use area is avoided, and electronic devices and precise devices are not arranged inside the storage tank, so that the detection result cannot be influenced by feed liquid.
Drawings
FIG. 1 is a schematic diagram showing a structure of a sump corrosion detection apparatus in embodiment 1 of the present invention;
FIG. 2 is a schematic diagram showing a structure of a sump corrosion detection apparatus according to embodiment 2 of the present invention.
In the figure: 1. a first detection tube; 11. a first stop valve; 2. an indication liquid tank; 3. a detection assembly; 31. a liquid level detecting member; 32. a radioactive aerosol detection member; 4. a storage tank; 5. a detection groove; 6. a second detection tube; 61. a second shut-off valve; 7. a cell.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent, and the embodiments described in detail, but not necessarily all, in connection with the accompanying drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
In the description of the present invention, it should be noted that, the terms "upper," "lower," and the like indicate an orientation or a positional relationship based on the orientation or the positional relationship shown in the drawings, and are merely for convenience and simplicity of description, and do not indicate or imply that the apparatus or element in question must be provided with a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "configured," "mounted," "secured," and the like are to be construed broadly and may be either fixedly connected or detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Example 1
As shown in fig. 1, the tank corrosion detection device of the present embodiment includes a first detection pipe 1, an indication liquid tank 2 and a detection assembly 3, a tank 4 is located in an equipment room for storing a liquid, the indication liquid tank 2 is located outside the equipment room where the tank 4 is located for storing an indication liquid, in the present embodiment, the tank 4 is placed in the first equipment room, and the indication liquid tank 2 and the detection assembly 3 are placed in a second equipment room.
The one end of first detecting tube 1 seals, seals the end and the corrosion resistance of storage tank 4 unanimous, and penetrates in the storage tank 4, and be located the feed liquid level below, the other end opening of first detecting tube 1, the open end penetrates in the instruction cistern 2, and be located the instruction liquid level below and form the liquid seal, the inside of first detecting tube 1 is full of the settlement gas, the settlement gas is including the gas that dissolves in the feed liquid but is insoluble in the instruction liquid, thereby be used for making in the first detecting tube 1 negative pressure production change in order to make the instruction liquid level after sealing the end fracture, detecting assembly 3 is used for detecting the instruction liquid level position, and send the alarm when the instruction liquid level changes, in order to be used for promoting storage tank 4 to reach design corrosion allowance upper limit.
In this embodiment, the sealed end of the first detection tube 1 is set to be consistent with the corrosion resistance of the tank 4, so that the sealed end is used as a sample of the tank 4 and is placed in the same environment as the tank 4, and therefore the corrosion degree of the sealed end and the corrosion degree of the tank 4 are always the same. Once the storage tank 4 reaches the upper limit of the designed corrosion allowance, the sealing end is broken along with the corrosion allowance, so that gas in the first detection pipe 1 is dissolved in feed liquid, the air pressure in the first detection pipe 1 is reduced along with the corrosion allowance, the liquid level in the opening end is increased due to negative pressure, the liquid level in the communicated indication liquid tank 2 is reduced, and the corrosion condition of the storage tank 4 can be fed back by utilizing the change.
Compared with the traditional corrosion resistance detection mode, the real-time detection of the corrosion condition of the storage tank 4 can be realized through the detection mode, the situations that the storage tank 4 reaches the corrosion allowance in advance and the like caused by deviation of the corrosion resistance test data due to specific conditions can be avoided, the feedback result of the storage tank 4 can be fed back through the first detection pipe 1 immediately after the upper limit of the corrosion allowance is reached, the use safety of the storage tank 4 is ensured, the leakage risk of feed liquid is reduced, and the detection mode can be used in the storage field of radioactive feed liquid.
And the open end of the first detecting tube 1 and the detecting assembly 3 can be arranged outside the area of the storage tank 4, and are not limited by the using area, and electronic devices and precise devices are not arranged in the storage tank 4, so that the detecting result cannot be influenced by feed liquid, and when the detecting assembly is used for a radioactive feed liquid storage tank, the detecting assembly 3 cannot be influenced by radioactivity, and radiation aging can be avoided, so that the device can carry out corrosion detection on the active radioactive feed liquid storage tank.
In this example, the feed liquid is a radioactive feed liquid, the components of the radioactive feed liquid are mainly nitric acid with the concentration of about 2.5mol/L and a small amount of radionuclide, and since corrosion detection cannot introduce other substances which are unfavorable for the subsequent treatment of the radioactive feed liquid, 90% of the set gases selected in this example do not react with the feed liquid, and the remaining 10% of the gases react with water to produce NO of nitric acid 2 The gas and the indicator liquid are nonpolar grease liquid which is insoluble and non-reactive with the gas in the first detection tube 1. The indicator liquid has certain volatility, so that the liquid needs to be supplemented. The detection assembly 3 comprises a controller and a first detection unit, the first detection unit comprises a liquid level detection piece 31, a first alarm and a second alarm, the liquid level detection piece 31 is electrically connected with the controller and is used for detecting the liquid level position of the indication liquid, sending a first signal to the controller when the liquid level position of the indication liquid is lower than a first set value and not lower than a second set value, and sending a second signal to the controller when the liquid level position of the indication liquid is lower than the second set value, and the second set value is lower than the first set value; the controller is used for controlling the first alarm to send out a liquid supplementing alarm according to the first signal so as to prompt the supplementing of the indicating liquid, and controlling the second alarm to send out a breaking alarm according to the second signal so as to prompt the sealing end of the first detection tube 1 to break, and the storage tank 4 reaches the upper limit of the designed corrosion allowance.
In this embodiment, the liquid level detection part 31 detects the height of the indicating liquid level from the bottom of the indicating liquid tank 2, when the indicating liquid is volatilized normally to the first set value (or low liquid level), the controller can prompt the staff to supplement the liquid in time, prevent the indicating liquid from continuously decreasing to the second set value (low liquid level) to influence the detection result, when the indicating liquid is directly decreased to the low liquid level, the sealed end of the first detecting tube 1 is indicated to be broken, the storage tank 4 reaches the upper limit of the designed corrosion allowance, and the controller can send out corresponding alarm to prompt the staff to process in time.
In this embodiment, a stop valve 11 is disposed on the pipe body of the first detection pipe 1, and the stop valve 11 is used to seal or conduct the inside of the first detection pipe 1. The stop valve 11 is electrically connected with a controller, and the controller is further used for controlling the stop valve 11 to switch off the first detection tube 1 according to the second signal.
In the present embodiment, the liquid level detecting member 31 detects the change in the liquid level of the indicating liquid in the indicating liquid tank 2. The first detection unit and the controller can be arranged separately, and can also be integrated to form a liquid level alarm.
The top of the indication liquid tank 2 is provided with a funnel structure, when the liquid level in the tank is slightly lower, the funnel structure on the tank is used for supplementing liquid, when the first detection pipe 1 is broken, 10% of gas in the pipe is dissolved in the liquid, the first detection pipe 1 is internally provided with a negative pressure of about 0.01 MPa, the liquid level in the first detection pipe 1 is increased, the rising height is related to the selected indication liquid density, the liquid level in the indication liquid tank 2 is suddenly reduced, the liquid level is at a low liquid level, the controller alarms, and meanwhile, the stop valve 11 is closed in a linkage manner, so that leakage is avoided.
In this embodiment, the open end of the first detecting tube 1 is made of transparent material, and is used for observing the position of the liquid level of the indication liquid in the first detecting tube 1. The transparent visual material is used at the open end, can let the staff observe the interior indication liquid level condition of first detection tube 1 to with the result of detecting subassembly 3 evidence.
In this embodiment, the material of the sealing end of the first detecting tube 1 is consistent with the material of the storage tank 4, and the thickness of the tube wall of the sealing end is also consistent with the design corrosion allowance of the storage tank 4; because most of the large-volume storage tanks 4 are not formed by one-time pouring, the corrosion rules of the welded parts are different from the smooth parts of the storage tanks 4, and in order to reflect the corrosion conditions of all the points of the storage tanks 4 as much as possible, the sealing end sealing part of the sealing end of the first detection pipe 1 is provided with a welding line, and the welding line is consistent with the welding mode of the main body welding line of the storage tanks 4, so that the uniform corrosion condition of the smooth parts of the storage tanks 4 can be fed back, and the local corrosion condition caused by welding can also be fed back. Through material, thickness and welding mode complete unanimity, can realize that first detection pipe 1 seals end and storage tank 4 corrosion resistance unanimity, no matter the feed liquid makes the storage tank reach the limit through corroding the wall or makes the storage tank reach the limit through corroding the welding seam, all can make first detection pipe 1 take place the breach simultaneously to the corrosion behavior of feedback storage tank 4.
In this embodiment, as shown in fig. 2, the inner diameter of the sealed end of the first detecting tube 1 may be gradually enlarged at the end to form the small chamber 7, so that the feed liquid may enter the small chamber 7 after the first detecting tube 1 is broken, so as to increase the contact area between the feed liquid and the set gas in the first detecting tube 1.
The embodiment utilizes the broken condition of the first detection tube 1 made of the same material to reflect the corrosion condition of equipment, and has simple structure and low cost; the corrosion condition of the radioactive feed liquid storage tank is fed back by utilizing the liquid level change of the first detection pipe 1, devices are not required to be taken out of the storage tank 4 to observe the corrosion condition, and the operation flow is simple; the in-service radioactive feed liquid storage tank can be modified, and the first detection pipe 1 is inserted into the radioactive feed liquid storage tank for modification by utilizing a reserved spare pipe orifice. The electronic device that this embodiment relates to only detects subassembly 3, and the first detection tube 1 wears the wall and stretches out the equipment outdoor, and the indication cistern 2 and the detection subassembly 3 are placed in the region that the radioactivity is lower, and the high radioactivity equipment room that the storage tank 4 is located does not have electrical components, reducible radiation-induced electronic component damages.
Example 2
This embodiment includes all the technical solutions of embodiment 1, in this embodiment, as shown in fig. 2, in addition to the solution of embodiment 1, the sump corrosion detection apparatus further includes a detection tank 5 and a second detection tube 6, where the detection tank 5 is located outside the equipment room where the sump 4 is located, in this embodiment, the sump 4 is placed in the first equipment room, and the detection assembly 3, the detection tank 5, and the indication liquid tank 2 are all placed in the second equipment room.
The second detecting tube 6 has one sealed end, which is consistent with the corrosion resistance of the storage tank 4, penetrates into the storage tank 4 and is located below the liquid level of the feed liquid, the second detecting tube 6 has the other end open, the open end is communicated to the detecting tank 5, the detecting assembly 3 is further used for detecting the gas component in the detecting tank 5, and an alarm is sent when the gas component in the detecting tank 5 contains the set characteristic so as to prompt the storage tank 4 to reach the upper limit of the designed corrosion allowance.
In this arrangement, the second detection tube 6 is similar to the first detection tube 1 in that the sealed end is used as a sample of the tank 4 and is placed in the same environment as the tank 4, so that the corrosion degree of the sealed end and the tank 4 is always the same. Once the storage tank 4 reaches the upper limit of the designed corrosion allowance, the sealing end is broken along with the corrosion allowance, and after the corrosion, the feed liquid component enters the detection tank 5 through the second detection pipe 6, so that the detection component 3 is used as a detection standard for judging whether the second detection pipe 6 is broken or not.
The real-time detection of the corrosion condition of the storage tank 4 can be realized through the detection mode, and the detection mode is used simultaneously with the detection scheme of the first detection pipe 1, so that the two detection modes can be mutually proved, the conditions of misjudgment, missed judgment and the like caused by the sealing failure of a certain detection pipe can be avoided through the redundant design, the accuracy of the detection result is further improved, and the leakage risk of feed liquid is reduced.
In this embodiment, the feed liquid is a radioactive feed liquid, and the detection assembly 3 further includes a second detection unit, where the second detection unit includes a radioactive aerosol detection element 32 and a third alarm, and the radioactive aerosol detection element 32 is electrically connected to the controller and is used for detecting a gas component in the detection tank 5. The second detecting tube 6 is filled with air, the second detecting tube 6 is broken to cause the radioactive feed liquid to flow in, radioactive aerosol is formed in the second detecting tube 6 and enters the detecting groove 5 through diffusion, the radioactive aerosol detecting piece 32 sends a third signal to the controller when the radioactivity of the gas component in the detecting groove 5 occurs, the controller is electrically connected with the third alarm and is used for controlling the third alarm to send out a breaking alarm according to the third signal so as to prompt the breakage of the sealing end of the second detecting tube 6, and the storage tank 4 reaches the upper limit of the designed corrosion allowance.
In this embodiment, the second check valve 61 is disposed on the pipe body of the second detection pipe 6, and the second check valve 61 is electrically connected with the controller, and the controller is further configured to control the second check valve 61 to close the second detection pipe 6 according to the third signal, so as to avoid the radioactive aerosol from entering the external environment.
The controller in this embodiment and the controller in embodiment 1 may be the same control device, or may be different control devices, or may be a liquid level alarm formed by integrating the controller with the first detection unit, and a radioactive aerosol alarm formed by integrating the controller with the second detection unit.
In this embodiment, the material of the sealing end of the second detecting tube 6 is consistent with the material of the storage tank 4, and the thickness of the tube wall of the sealing end is consistent with the designed corrosion allowance of the storage tank 4, because most of the storage tanks 4 with large volumes are not formed by casting at one time, the corrosion rule of the welded part is different from that of the smooth part of the storage tank 4, in order to reflect the corrosion condition of all the points of the storage tank 4 as much as possible, the sealing end of the second detecting tube 6 is provided with a welding seam, and the welding seam is consistent with the welding mode of the main body welding seam of the storage tank 4. The corrosion resistance of the sealed end of the second detection tube 6 is identical to that of the storage tank 4 through the material, the thickness and the welding mode.
In this embodiment, the inner diameter of the end of the sealed end of the second detecting tube 6 is gradually enlarged to form the small chamber 7, so that the feed liquid can enter the small chamber 7 after the second detecting tube 6 is broken, the contact surface between the feed liquid and the air is increased, the volatilization speed is accelerated, in addition, the welding seam is inconvenient to set due to the relatively narrow tube orifice, and the welding seam at the sealed end of the second detecting tube 6 can be further arranged on the small chamber 7.
Example 3
The radioactive liquid storage system of this embodiment includes a storage tank 4, a first equipment room, a second equipment room, and a storage tank corrosion detection device in embodiment 1 or embodiment 2, the radioactivity in the first equipment room is higher, the radioactivity in the second equipment room is lower, the storage tank 4 is arranged in the first equipment room, the liquid stored in the storage tank 4 is the radioactive liquid, an indication liquid tank 2 and a detection component 3 of the storage tank corrosion detection device are arranged in the second equipment room, and the storage tank corrosion detection device is used for detecting whether the storage tank 4 reaches the upper limit of the designed corrosion allowance.
The indication liquid tank 2 and the detection component 3 are arranged outside the first equipment room with higher radioactivity, and no precise electric device is arranged in the first equipment room with higher radioactivity where the radioactive liquid storage tank is arranged, so that radiation aging can be avoided, corrosion detection can be carried out on the active radioactive liquid storage tank, the risk of radioactive material leakage is reduced, and facility safety is ensured.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (10)
1. The utility model provides a storage tank corrosion detection device which characterized in that: comprises a first detection tube (1), an indication liquid groove (2) and a detection component (3),
the storage tank (4) is positioned in the equipment room and is used for storing feed liquid,
the indication liquid groove (2) is positioned outside the equipment room where the storage tank (4) is positioned and is used for storing indication liquid,
one end of the first detection tube (1) is sealed, the corrosion resistance of the sealed end is consistent with that of the storage tank (4), the sealed end penetrates into the storage tank (4) and is positioned below the liquid level of the feed liquid,
the other end of the first detection tube (1) is open, the open end penetrates into the indication liquid groove (2) and is positioned below the liquid level of the indication liquid,
the first detection tube (1) is internally filled with a set gas, the set gas comprises a gas which is dissolved in feed liquid but not dissolved in the indication liquid, and the set gas is used for generating negative pressure in the first detection tube (1) after the sealing end is broken so as to change the liquid level of the indication liquid,
the detection component (3) is used for detecting the liquid level position of the indication liquid and sending out an alarm when the liquid level of the indication liquid changes, so as to prompt the storage tank (4) to reach the upper limit of the designed corrosion allowance.
2. The sump corrosion detection apparatus of claim 1, wherein: the detection assembly (3) comprises a controller and a first detection unit, the first detection unit comprises a liquid level detection piece (31), a first alarm and a second alarm,
the liquid level detection piece (31) is electrically connected with the controller and is used for detecting the liquid level position of the indication liquid, sending a first signal to the controller when the liquid level position of the indication liquid is lower than a first set value and is not lower than a second set value, and sending a second signal to the controller when the liquid level position of the indication liquid is lower than the second set value; the second setting is lower than the first setting;
the controller is electrically connected with the first alarm and the second alarm respectively and is used for controlling the first alarm to send out a liquid supplementing alarm according to the first signal so as to prompt the supplementing of the indication liquid, and controlling the second alarm to send out a breaking alarm according to the second signal so as to prompt the sealing end of the first detection tube (1) to break, and the storage tank (4) reaches the upper limit of the designed corrosion allowance.
3. The sump corrosion detection apparatus of claim 2, wherein: a first stop valve (11) is arranged on the pipe body of the first detection pipe (1), the first stop valve (11) is electrically connected with the controller,
the controller is also used for controlling the first stop valve (11) to switch off the first detection tube (1) according to the second signal.
4. The sump corrosion detection apparatus of claim 2, wherein: also comprises a detection groove (5) and a second detection tube (6),
the detection groove (5) is positioned outside the equipment room where the storage groove (4) is positioned,
one end of the second detection tube (6) is sealed, the corrosion resistance of the sealed end is consistent with that of the storage tank (4), the sealed end penetrates into the storage tank (4) and is positioned below the liquid level of the feed liquid,
the other end of the second detection tube (6) is opened, the opening end is communicated with the detection groove (5),
the detection assembly (3) is also used for detecting the gas component in the detection tank (5) and sending out an alarm when the gas component in the detection tank (5) contains a set characteristic so as to prompt the storage tank (4) to reach the upper limit of the designed corrosion allowance.
5. The sump corrosion detection apparatus of claim 4, wherein: the feed liquid is a radioactive feed liquid,
the detection assembly (3) further comprises a second detection unit comprising a radioactive aerosol detection member (32) and a third alarm,
the radioactive aerosol detection piece (32) is electrically connected with the controller and is used for detecting the gas component in the detection groove (5) and sending a third signal to the controller when the gas component in the detection groove (5) is radioactive,
the controller is electrically connected with the third alarm and is used for controlling the third alarm to send out a breaking alarm according to a third signal so as to prompt the sealing end of the second detection tube (6) to break, and the storage tank (4) reaches the upper limit of the designed corrosion allowance.
6. The sump corrosion detection apparatus of claim 5, wherein: a second stop valve (61) is arranged on the pipe body of the second detection pipe (6), the second stop valve (61) is electrically connected with the controller,
the controller is also used for controlling the second stop valve (61) to switch off the second detection pipe (6) according to the third signal.
7. The sump corrosion detection apparatus of claim 4, wherein: the material of the sealing end of the first detection tube (1)/the second detection tube (6) is consistent with that of the storage tank (4), the thickness of the tube wall of the sealing end is consistent with the design corrosion allowance of the storage tank (4),
the sealing end sealing position of the first detection tube (1)/the second detection tube (6) is provided with a welding line, and the welding line is consistent with the main body welding line of the storage tank (4).
8. The sump corrosion detection apparatus of claim 7, wherein: the inner diameter of the end of the sealing end of the first detection tube (1)/the second detection tube (6) is gradually enlarged to form a small chamber (7), so that the feed liquid can enter the small chamber (7) after the first detection tube (1)/the second detection tube (6) is broken,
the welding seam at the sealing end of the first detection tube (1)/the second detection tube (6) is arranged on the small chamber (7).
9. The sump corrosion detection apparatus of claim 1, wherein: the opening end of the first detection tube (1) is made of transparent materials and is used for observing the position of the liquid level of the indication liquid in the first detection tube (1).
10. A radioactive feed liquid storage system, characterized in that: comprising a sump (4), a first equipment compartment, a second equipment compartment, and a sump corrosion detection apparatus according to any one of claims 1 to 9,
the storage tank (4) is arranged in the first equipment room, the feed liquid stored in the storage tank (4) is radioactive feed liquid,
the indication liquid tank (2) and the detection component (3) of the storage tank corrosion detection device are arranged in the second equipment room, and the storage tank corrosion detection device is used for detecting whether the storage tank (4) reaches the upper limit of the designed corrosion allowance.
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| CN202311256218.9A CN117030592B (en) | 2023-09-27 | 2023-09-27 | Storage tank corrosion detection device and radioactive feed liquid storage system |
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| CN210769342U (en) * | 2020-02-28 | 2020-06-16 | 新疆一和生物有限责任公司 | Liquid pumping device |
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| DE102019108564A1 (en) * | 2019-04-02 | 2020-10-08 | Endress+Hauser SE+Co. KG | Additional module for a field device |
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| US4135386A (en) * | 1977-12-27 | 1979-01-23 | Continental Oil Company | Porous material crack detection |
| CN203366144U (en) * | 2013-07-26 | 2013-12-25 | 武汉钢铁(集团)公司 | Solution supplementing device of cyclic immersion corrosion test |
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| CN117030592A (en) | 2023-11-10 |
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