Detergent for pressurized water reactor nuclear power station component, preparation method and decontamination device

Abstract

The invention relates to the technical field of nuclear facility radioactive chemical decontamination, in particular to a pressurized water reactor nuclear power station component detergent, a preparation method and a decontamination device.The pressurized water reactor nuclear power station component detergent comprises a rationing assembly, an ultrasonic motor and a frame arranged at the bottom end of the ultrasonic motor, and a water pump is installed at the top end of the frame; the side wall of the water pump is provided with a distribution tank used for containing ingredient raw materials, and the bottom end of the distribution tank is provided with a conveying pipe; the decontamination assembly comprises a water tank arranged at the top end of the frame, a decontamination piece used for containing a decontamination agent is installed at the top end of the water tank, the stirring box can be sealed by moving one half of a protruding plate upwards, at the moment, a cleaning piece is started to clean a workpiece, the workpiece is cleaned up and down at the same time, the cleaning efficiency of the workpiece can be effectively improved, and the cleaning efficiency of the workpiece is improved. The detergent is simple in component, easy to prepare, low in toxicity or non-toxic, and good in compounding performance of the components, and the raw materials are easy to obtain.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear facility radioactive chemical decontamination, in particular to a pressurized water reactor nuclear power plant component decontamination agent, a configuration method and a decontamination device. Background Art

[0002] Nuclear power is a clean energy source with the characteristics of stability, high efficiency and scalability. Pressurized water reactors have become the main type of new nuclear power reactors in my country due to their compact structure, small size, high power density, deep average burnup, radioactive fission products that are not easy to escape, good power self-stabilization and self-adjustment characteristics, high safety and reliability. During the operation of a nuclear reactor, the core will produce and gradually accumulate activated corrosion products, and pass through the entire primary circuit with cooling water as the carrier, causing the primary circuit cooling system pipelines to be filled with radioactive nuclides, which are gradually deposited on stainless steel pipelines and corresponding equipment under high temperature and high pressure conditions, creating major safety hazards. The use of chemical decontamination technology can effectively reduce the amount of radioactive deposits in the primary circuit cooling system pipelines, thereby reducing the risk of radiation damage to operators from the reactor primary circuit cooling system. Regular decontamination of the reactor primary circuit has become normalized;

[0003] In fact, due to the complex environment inside the primary-loop pressure vessel, the composition of the deposited dirt is relatively complex. Currently, a single decontamination agent cannot completely remove the dirt from the primary-loop equipment components of a pressurized water reactor nuclear power plant reactor. The flushing process of the equipment components to remove oil pollution is more troublesome, and the flushing time is longer due to incomplete flushing. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the problem that the above-mentioned single decontamination agent cannot completely remove the contaminants in the primary loop equipment components of a pressurized water reactor nuclear power plant reactor, the present invention is proposed.

[0006] Therefore, one of the objects of the present invention is to provide a decontamination agent for pressurized water reactor nuclear power plant components.

[0007] In order to solve the above technical problems, the present invention provides the following technical solution: comprising, by weight, the following ingredients: 3 to 8 parts of citric acid, 1 to 3 parts of hydroxyacetic acid, 0.2 to 4 parts of ethanolamine, 0.1 to 1 part of polyacrylic acid, 0.5 to 2 parts of diethylenetriaminepentaacetic acid and 82.0 to 95.2 parts of water, and finally introducing the above ingredients into a stirring box and mixing them evenly.

[0008] The decontaminant for pressurized water reactor nuclear power plant components of the present invention has the following beneficial effects: the decontaminant of the present invention has simple ingredients, is easy to prepare, and has readily available raw materials with low toxicity or no toxicity, and the components of the decontaminant have good composite performance, and the loaded polyacrylic acid and diethylenetriaminepentaacetic acid improve the decontamination effect of the foam on particulate oxides and colloidal nuclides, and at the same time, the decontaminant has low corrosiveness to materials, has no risk of corrosive damage to equipment materials, and the decontaminant is simple to use and easy to operate on site.

[0009] In actual use, there is still a problem that there is no corresponding decontamination agent for nuclear power plant workpieces, resulting in poor decontamination effect.

[0010] In order to solve the above technical problems, the present invention also provides the following technical solutions: a method for configuring a decontaminant for a pressurized water reactor nuclear power plant component, comprising the above-mentioned decontaminant for a pressurized water reactor nuclear power plant component, and further comprising:

[0011] Add diethylenetriamine pentaacetic acid to ultrapure water, then add ethanolamine in a 1:1 mass ratio, then pour into a stirring box and rotate the stirring rod to stir for 2 to 5 minutes to completely dissolve the diethylenetriamine pentaacetic acid;

[0012] Add polyacrylic acid to the aqueous solution obtained in the previous step in the stirring box again, and rotate the stirring rod to stir for 1 to 2 minutes to completely dissolve the polyacrylic acid;

[0013] The aqueous solution is obtained in the stirring box in the previous step, citric acid and glycolic acid are added to the aqueous solution again, and the stirring rod is slowly rotated to stir until the citric acid and glycolic acid are completely dissolved;

[0014] Ethanolamine, citric acid and glycolic acid are added to the solution obtained from the stirring box in the previous step to adjust the pH value of the solution. After the pH value is adjusted to 1.5-2.5, an off-line chemical decontaminant for primary circuit equipment components of a pressurized water reactor nuclear power plant is obtained.

[0015] The beneficial effects of the method for preparing a decontaminant for components of a pressurized water reactor nuclear power plant described in the present invention are as follows: the method comprises the following steps: adding diethylenetriaminepentaacetic acid to ultrapure water, then adding ethanolamine in a certain proportion, and then manually stirring to completely dissolve the diethylenetriaminepentaacetic acid, and then adding polyacrylic acid and stirring again to completely dissolve it. This step-by-step dissolution process can fully mix various components and enhance the uniformity and stability of the decontaminant. Citric acid and glycolic acid are added to the solution, and the pH value of the solution is adjusted to 1.5 to 2.5. This adjustment can enhance the acidity of the decontaminant, which may be more effective in removing some stubborn stains and impurities. Due to the special properties of the components of the primary circuit equipment of the nuclear power plant, the use of an offline chemical decontaminant can effectively remove stains without damaging the equipment. The decontaminant utilizes the synergistic effect of various chemical components and may have a better removal effect on different types of stains.

[0016] In actual use, there is still the problem that the equipment parts for degreasing are troublesome to flush, and the flushing time is long due to incomplete flushing.

[0017] In order to solve the above technical problems, the present invention also provides the following technical solutions: a decontamination device, including the above pressurized water reactor nuclear power plant component decontamination agent configuration method, and also including a distribution component, including an ultrasonic motor, a frame arranged at the bottom end of the ultrasonic motor, a water pump is installed at the top of the frame, a distribution tank for containing the decontamination raw material is installed on the side wall of the water pump, and a delivery pipe is arranged at the bottom end of the distribution tank;

[0018] The decontamination component includes a water tank arranged at the top of the frame, a decontamination part for containing a decontamination agent is installed on the top of the water tank, and the water tank is used to introduce and store the decontamination agent mixed inside the decontamination part, and a cleaning part for decontaminating the workpiece using the decontamination agent is arranged on the top of the decontamination part.

[0019] As a preferred embodiment of the decontamination device of the present invention, the decontamination component includes a partition arranged inside the water tank, a raised plate for introducing the mixed decontamination agent into the water tank is installed on the top of the partition, a telescopic cylinder is installed on the top of the raised plate, and the top of the telescopic cylinder is connected to the frame.

[0020] As a preferred solution of the decontamination device of the present invention, the decontamination member further comprises a baffle plate arranged at the end of the piston rod of the telescopic cylinder, a placement rod is installed at the top end of the baffle plate, and a cover plate is arranged on the circumferential side wall of the telescopic cylinder.

[0021] As a preferred solution of the decontamination device of the present invention, wherein: a connecting plate is provided at the top end of the cover plate, a movable plate is installed at the bottom end of the connecting plate, the bottom end of the movable plate extends through the cover plate to the outside, so that the movable plate and the cover plate are slidably connected, and a through groove is installed at the top end of the cover plate, a semicircular block is installed inside the through groove, and a triangular block is installed on the side wall of the semicircular block to connect with the cover plate.

[0022] As a preferred embodiment of the decontamination device of the present invention, a stirring box for containing a decontamination agent is installed at the top of the connecting plate, a material guide pipe is installed at the top of the stirring box, a servo motor is installed at the top of the material guide pipe, a fixed shaft is installed at the output end of the servo motor, and a stirring rod is installed on the side wall of the fixed shaft.

[0023] As a preferred embodiment of the decontamination device of the present invention, the cleaning part includes a spray pipe arranged inside the water tank, a water pipe is installed at the bottom end of the cover plate, a branch pipe is installed on the side wall of the water pipe, and nozzles are installed at the bottom ends of the branch pipe and the water pipe.

[0024] As a preferred solution of the decontamination device of the present invention, the cleaning part includes a water inlet pipe arranged at the top of the water guide pipe, an inclined groove is arranged inside the water inlet pipe, a water wheel is arranged at the bottom end of the water inlet pipe, and a toggle block is installed at the bottom end of the water wheel.

[0025] As a preferred embodiment of the decontamination device of the present invention, the toggle block includes a connecting plate arranged at the bottom end of the water wheel, a connecting shaft is installed inside the connecting plate, a toggle plate is sleeved on the side wall of the connecting shaft, a torsion spring is arranged between the connecting shaft and the toggle plate, a fixing rod is installed on the side wall of the toggle plate, a limiting plate is installed on the bottom end of the fixing rod, a moving rod is installed on the bottom end of the limiting plate, and a telescopic spring is sleeved on the side wall of the moving rod.

[0026] The beneficial effects of the decontamination device described in the present invention are as follows: the present invention starts the decontamination component to drive the workpiece that needs to be decontaminated to move downward, and during the downward movement, the connecting plate is lifted upward by the raised plate to introduce the decontamination agent prepared in the mixing box into the water tank to decontaminate the workpiece, and then when the workpiece needs to be cleaned, half of the raised plate is moved upward to seal the mixing box. At this time, the cleaning component is started to clean the workpiece, and the workpiece is cleaned simultaneously from top to bottom, which can effectively improve the cleaning efficiency of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0028] Figure 1 This is an overall schematic diagram of the decontamination device.

[0029] Figure 2 It is the rear view of the overall structure of the decontamination device.

[0030] Figure 3 This is a bottom view of the overall structure of the decontamination device.

[0031] Figure 4 It is a schematic diagram of the structure of the decontamination component of the decontamination device.

[0032] Figure 5 This is a schematic diagram of the disassembled structure of the decontamination component of the decontamination device.

[0033] Figure 6 It is a schematic diagram of the cross-sectional structure of the decontamination component of the decontamination device.

[0034] Figure 7 Schematic diagram of the semicircular block structure of the decontamination device.

[0035] Figure 8 This is a schematic diagram of the second cleaning structure of the cleaning part of the decontamination device.

[0036] Fig. 9 This is a schematic cross-sectional view of the first cleaning structure of the cleaning component of the decontamination device.

[0037] Fig.10 This is a schematic diagram of the position structure of the inclined slot of the second cleaning structure of the cleaning part of the decontamination device.

[0038] Fig.11 This is a bottom view of the moving rod position structure of the second cleaning structure of the cleaning part of the decontamination device.

[0039] Fig.12 This is a schematic diagram of the internal structure of the water inlet pipe of the second cleaning structure of the cleaning part of the decontamination device.

[0040] Fig.13 This is a schematic diagram of the split structure of the second cleaning structure toggle block of the cleaning part of the decontamination device.

[0041] Fig.14 for Fig.13 Enlarged view of point A in .

[0042] Reference numerals:

[0043] 100, dispensing assembly; 101, ultrasonic motor; 102, frame; 103, water pump; 104, dispensing tank; 105, delivery pipe;

[0044] 200, decontamination assembly; 201, water tank; 202, decontamination member; 202a, partition; 202b, raised plate; 202c, telescopic cylinder; 202d, baffle; 202e, storage rod; 202f, cover plate; 202g, connecting plate; 202h, moving plate; 202i, through groove; 202j, semicircular block; 202k, triangular block; 202l, stirring box; 202m, guide tube; 202n, servo motor; 202p, fixed shaft; 202q, stirring rod; 203, cleaning part; 203a, spray pipe; 203b, water guide pipe; 203c, branch pipe; 203d, nozzle; 203e, water inlet pipe; 203f, inclined groove; 203g, water wheel; 203h, toggle block; 203h-1, connecting plate; 203h-2, connecting shaft; 203h-3, toggle plate; 203h-4, torsion spring; 203h-5, fixed rod; 203h-6, limit plate; 203h-7, moving rod; 203h-8, telescopic spring. DETAILED DESCRIPTION

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0047] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0048] Example 1

[0049] Reference Figure 1-Figure 4 , which is the first embodiment of the present invention, provides a decontaminant for pressurized water reactor nuclear power plant components, including the following ingredients by weight: 3 to 8 parts of citric acid, 1 to 3 parts of hydroxyacetic acid, 0.2 to 4 parts of ethanolamine, 0.1 to 1 part of polyacrylic acid, 0.5 to 2 parts of diethylenetriaminepentaacetic acid and 82.0 to 95.2 parts of water. The above ingredients are finally introduced into a stirring box and mixed evenly.

[0050] Example 2

[0051] This embodiment is the second embodiment of the present invention, and provides a method for preparing a decontaminant for a pressurized water reactor nuclear power plant component, comprising: adding diethylenetriaminepentaacetic acid to ultrapure water, then adding ethanolamine in a mass ratio of 1:1, and then pouring the water into a stirring box and rotating a stirring rod to stir for 2 to 5 minutes to completely dissolve the diethylenetriaminepentaacetic acid;

[0052] Add polyacrylic acid to the aqueous solution obtained in the previous step in the stirring box again, and rotate the stirring rod to stir for 1 to 2 minutes to completely dissolve the polyacrylic acid;

[0053] The aqueous solution is obtained in the stirring box in the previous step, citric acid and glycolic acid are added to the aqueous solution again, and the stirring rod is slowly rotated to stir until the citric acid and glycolic acid are completely dissolved;

[0054] Ethanolamine, citric acid and glycolic acid are added to the solution obtained from the stirring box in the previous step to adjust the pH value of the solution. After the pH value is adjusted to 1.5-2.5, an off-line chemical decontaminant for primary circuit equipment components of a pressurized water reactor nuclear power plant is obtained.

[0055] Simulation of oxide film removal rate and material corrosion rate for the main pump impeller material X3CrNiMo13-4

[0056] Comparative Example 1: 2 parts of citric acid, 3 parts of glycolic acid, 0.1 parts of ethanolamine, 0.1 parts of polyacrylic acid, 0.5 parts of diethylenetriaminepentaacetic acid and 94.3 parts of water;

[0057] The experiment shows that the simulated oxide film removal rate of the main pump impeller material X3CrNiMo13-4 in a specific ratio of decontaminant is 88%, and the material corrosion rate is 0.04g / (m 2 .h).

[0058] Comparative Example 2: 2 parts of citric acid, 2 parts of glycolic acid, 0.1 parts of ethanolamine, 0.1 parts of polyacrylic acid, 0.5 parts of diethylenetriaminepentaacetic acid and 95.3 parts of water;

[0059] The experiment shows that the simulated oxide film removal rate of the main pump impeller material X3CrNiMo13-4 in a specific ratio of decontaminant is 90%, and the material corrosion rate is 0.03g / (m 2 .h).

[0060] Comparative Example 3: 8 parts of citric acid, 2 parts of glycolic acid, 3 parts of ethanolamine, 0.1 parts of polyacrylic acid, 2 parts of diethylenetriaminepentaacetic acid and 84.9 parts of water;

[0061] The experiment shows that the simulated oxide film removal rate of the main pump impeller material X3CrNiMo13-4 in a specific ratio of decontaminant is 92%, and the material corrosion rate is 0.05g / (m 2 .h).

[0062] Simulation of oxide film removal rate and material corrosion rate for the impeller material ZG04Cr20Ni9 of the charging pump

[0063] Comparative Example 1: 2 parts of citric acid, 1 part of glycolic acid, 2 parts of ethanolamine, 1 part of polyacrylic acid, 1 part of diethylenetriaminepentaacetic acid and 93 parts of water;

[0064] The experiment shows that the simulated oxide film removal rate of the impeller material ZG04Cr20Ni9 in the specific ratio of the decontaminant is 95%, and the material corrosion rate is 0.02g / (m 2 .h).

[0065] Comparative Example 2: 2 parts of citric acid, 2 parts of glycolic acid, 0.1 parts of ethanolamine, 0.1 parts of polyacrylic acid, 0.5 parts of diethylenetriaminepentaacetic acid and 95.3 parts of water;

[0066] The experiment shows that the simulated oxide film removal rate of the impeller material ZG04Cr20Ni9 in the specific ratio of the decontaminant is 93%, and the material corrosion rate is 0.03g / (m2 .h), the corrosion rate is increased.

[0067] Comparative Example 3: 1 part of citric acid, 1 part of glycolic acid, 1 part of ethanolamine, 1 part of polyacrylic acid, 1 part of diethylenetriaminepentaacetic acid and 95 parts of water;

[0068] The experiment shows that the simulated oxide film removal rate of the impeller material ZG04Cr20Ni9 in the specific ratio of the decontaminant is 92%, and the material corrosion rate is 0.04g / (m 2 .h).

[0069] Simulation of oxide film removal rate and material corrosion rate for the impeller ZG06Cr13Ni4Mo of the waste heat removal pump

[0070] Comparative Example 1: 2 parts of citric acid, 2 parts of glycolic acid, 0.1 parts of ethanolamine, 0.1 parts of polyacrylic acid, 1 part of diethylenetriaminepentaacetic acid and 94.8 parts of water;

[0071] The experiment shows that the simulated oxide film removal rate of the impeller material ZG04Cr20Ni9 in the specific ratio of the decontaminant is 88%, and the material corrosion rate is 0.03g / (m 2 .h).

[0072] Comparative Example 2: 3 parts of citric acid, 1 part of glycolic acid, 3 parts of ethanolamine, 1 part of polyacrylic acid, 2 parts of diethylenetriaminepentaacetic acid and 90 parts of water;

[0073] The experiment shows that the simulated oxide film removal rate of the impeller material ZG04Cr20Ni9 in the specific ratio of the decontaminant is 96%, and the material corrosion rate is 0.03g / (m 2 .h).

[0074] Comparative Example 3: 2 parts of citric acid, 2 parts of glycolic acid, 2 parts of ethanolamine, 2 parts of polyacrylic acid, 2 parts of diethylenetriaminepentaacetic acid and 90 parts of water;

[0075] The experiment shows that the simulated oxide film removal rate of the impeller material ZG04Cr20Ni9 in the specific ratio of the decontaminant is 93%, and the material corrosion rate is 0.04g / (m 2 .h).

[0076] Table 1. Simulated oxide film removal rate and material corrosion rate of the main pump impeller material X3CrNiMo13-4 in Example 2

[0077]

[0078] From the test results in Table 1, it can be seen that the increase in the amount of citric acid added significantly improves the oxide film removal rate of the main pump impeller material, while the corrosion rate of the material is not much different.

[0079] Table 2 Example 2 upper charging pump impeller material ZG04Cr20Ni9 simulated oxide film removal rate and material corrosion rate table

[0080]

[0081] From the test results in Table 2, it can be seen that the reduction in the proportion of water significantly improves the removal rate of the oxide film of the impeller material of the charging pump.

[0082] Table 3 Simulated oxide film removal rate and material corrosion rate of ZG06Cr13Ni4Mo impeller of waste heat removal pump in Example 2

[0083]

[0084]

[0085] In summary, it can be seen that Example 3 has the best effect in terms of oxide film removal rate and material corrosion rate of the main pump impeller material, Example 1 has the best effect in terms of oxide film removal rate and material corrosion rate of the charging pump impeller material, and Example 2 has the best effect in terms of oxide film removal rate and material corrosion rate of the waste heat discharge pump impeller.

[0086] Operation process: Place the workpiece to be decontaminated on the placement rod 202e of the ultrasonic decontamination box, then move the workpiece down to the water tank 201, add the prepared decontaminant into the water tank 201, increase the temperature, and keep the temperature at 75-90°C, turn on the ultrasonic switch to generate water flow vibration, and decontaminate the workpiece immersed in the decontaminant for 1-8 hours. Then take out the workpiece, drain the decontaminant in the ultrasonic decontamination box, add deionized water, and then clean the workpiece through the cleaning part 203 to remove the residual dirt on the workpiece, and complete the decontamination process.

[0087] Example 3

[0088] Reference Figure 1-Figure 14 , which is the second embodiment of the present invention, and is different from the previous embodiment in that: a dispensing assembly 100 includes an ultrasonic motor 101, a frame 102 arranged at the bottom end of the ultrasonic motor 101, a water pump 103 is installed at the top end of the frame 102, a dispensing tank 104 for containing a dosing raw material is installed on the side wall of the water pump 103, and a delivery pipe 105 is arranged at the bottom end of the dispensing tank 104;

[0089] The decontamination component 200 includes a water tank 201 arranged at the top of the frame 102, and a decontamination component 202 for containing a decontamination agent is installed on the top of the water tank 201. The water tank 201 is used to introduce and store the decontamination agent mixed inside the decontamination component 202, and a cleaning component 203 for decontaminating the workpiece using the decontamination agent is arranged on the top of the decontamination component 202.

[0090] Furthermore, the dirt removal component 202 includes a partition 202a arranged inside the water tank 201, and a raised plate 202b for introducing the mixed dirt removal agent into the water tank 201 is installed on the top of the partition 202a, and a telescopic cylinder 202c is installed on the top of the raised plate 202b, and the top of the telescopic cylinder 202c is connected to the frame 102.

[0091] Furthermore, the dirt removing member 202 also includes a baffle 202d arranged at the end of the piston rod of the telescopic cylinder 202c, a placing rod 202e is installed on the top of the baffle 202d, and a cover plate 202f is arranged on the circumferential side wall of the telescopic cylinder 202c.

[0092] Furthermore, a connecting plate 202g is provided at the top of the cover plate 202f, and a movable plate 202h is installed at the bottom end of the connecting plate 202g. The bottom end of the movable plate 202h extends through the cover plate 202f to the outside, so that the movable plate 202h is slidably connected to the cover plate 202f, and a through groove 202i is installed at the top of the cover plate 202f, and a semicircular block 202j is installed inside the through groove 202i, and a triangular block 202k is installed on the side wall of the semicircular block 202j to be connected to the cover plate 202f.

[0093] Furthermore, a stirring box 202l for containing a decontaminant is installed at the top of the connecting plate 202g, a material guide pipe 202m is installed at the top of the stirring box 202l, a servo motor 202n is installed at the top of the material guide pipe 202m, a fixed shaft 202p is installed at the output end of the servo motor 202n, and a stirring rod 202q is installed on the side wall of the fixed shaft 202p.

[0094] Furthermore, the cleaning part 203 includes a spray pipe 203a arranged inside the water tank 201, a water pipe 203b is installed at the bottom end of the cover plate 202f, a branch pipe 203c is installed on the side wall of the water pipe 203b, and a nozzle 203d is installed at the bottom end of the branch pipe 203c and the water pipe 203b.

[0095] Furthermore, the cleaning part 203 includes a water inlet pipe 203e arranged at the top of the water guide pipe 203b, an inclined groove 203f is arranged inside the water inlet pipe 203e, a water wheel 203g is arranged at the bottom end of the water inlet pipe 203e, and a toggle block 203h is installed at the bottom end of the water wheel 203g.

[0096] Furthermore, the toggle block 203h includes a connecting plate 203h-1 arranged at the bottom end of the water wheel 203g, a connecting shaft 203h-2 is installed inside the connecting plate 203h-1, a toggle plate 203h-3 is sleeved on the side wall of the connecting shaft 203h-2, a torsion spring 203h-4 is arranged between the connecting shaft 203h-2 and the toggle plate 203h-3, and one end of the torsion spring 203h-4 is connected to the connecting shaft 203h-2. The torsion spring 203h-4 is connected to the toggle plate 203h-3 at one end away from the connecting shaft 203h-2. A fixed rod 203h-5 is installed on the side wall of the toggle plate 203h-3. A limiting plate 203h-6 is installed on the bottom end of the fixed rod 203h-5. A moving rod 203h-7 is installed on the bottom end of the limiting plate 203h-6. A telescopic spring 203h-8 is provided on the side wall of the moving rod 203h-7.

[0097] The rest of the structure is the same as that of Example 2.

[0098] Operation process: before starting the telescopic cylinder 202c, it is necessary to introduce the various components of the detergent into the mixing box 202l, and then start the servo motor 202n. The servo motor 202n can effectively drive the fixed shaft 202p to rotate, and the rotating fixed shaft 202p can drive the stirring rod 202q to stir the reagent evenly. While stirring, place the equipment workpiece that needs to be decontaminated on the top of the placement rod 202e, and then start the telescopic cylinder 202c. The telescopic cylinder 202c can effectively drive the baffle 202d to move toward the water tank 201, and the moving baffle 202d can drive the workpiece on the placement rod 202e to move downward into the water tank 201. During the movement, the downward pressure causes the raised plate 202b to press the movable plate 202h, thereby driving the connecting plate 202g to move upward, so that the connecting plate 202g The discharge port of the mixing box 2021 is separated from the semicircular block 202j, so that the prepared detergent in the mixing box 2021 is introduced into the water tank 201. Since the semicircular shape blocks the discharge port of the mixing box 2021, the residual reagent can be effectively reduced. The semicircular block 202j is connected to the cover plate 202f by the triangular block 202k. The side wall of the triangular block 202k is inclined, which can also effectively reduce the residual reagent, thereby effectively increasing the amount of reagent introduced into the water tank 201 and reducing the waste of reagent. After the workpiece is decontaminated, the telescopic cylinder 202c is started to move upward by half the height of the raised plate 202b, thereby reducing the pressure of the raised plate 202b on the moving plate 202h, so that the semicircular block 202j seals the mixing box 2021, and the spray pipe 203a and the nozzle 203d are started at the same time. Since there are two spraying modes on the top water guide pipe 203b:

[0099] The first spraying method is: a branch pipe 203c is arranged on the side wall of the water pipe 203b, and a nozzle 203d is arranged at the bottom end of the branch pipe 203c and the bottom end of the water pipe 203b. This method requires multiple nozzles 203d to ensure that there is no spraying dead angle. Once there are too few nozzles 203d and there is a spraying dead angle, it is easy to cause the workpiece to be cleaned more slowly, and the setting of multiple nozzles 203d leads to increased costs;

[0100] The second spraying method is: by setting a plurality of water inlet pipes 203e at the top of the water guide pipe 203b, the number of the water inlet pipes 203e corresponds to the number of the nozzles 203d, and then the water inlet pipes 203e pour water into the water wheel 203g through the inclined groove 203f, and then the water wheel 203g is driven by the water flow to rotate, so as to effectively drive the toggle block 203h to move, wherein the moving toggle block toggles the fixed rod 203h-5, and the toggled fixed rod 203h-5 can The movable rod 203h-7 is driven to move. Since the movable rod 203h-7 is located at the bottom end of the nozzle 203d, the water flow can be splashed everywhere to clean the workpiece. When the toggle block 203h is separated from the fixed rod 203h-5, the elastic force of the telescopic spring 203h-8 can effectively drive the movable rod 203h-7 to rebound, and the water flow is moved back and forth to generate water splashes, thereby effectively cleaning the workpiece without setting up multiple nozzles, thereby reducing production costs.

[0101] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0102] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0103] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0104] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A decontaminant for pressurized water reactor nuclear power plant components, characterized in that: The invention comprises the following components by weight: 3 to 8 parts of citric acid, 1 to 3 parts of hydroxyacetic acid, 0.2 to 4 parts of ethanolamine, 0.1 to 1 parts of polyacrylic acid, 0.5 to 2 parts of diethylenetriaminepentaacetic acid and 82.0 to 95.2 parts of water. The above components are finally introduced into a stirring box and mixed evenly.

2. A method for configuring a decontaminant for a pressurized water reactor nuclear power plant component, characterized in that: The decontaminant for pressurized water reactor nuclear power plant components according to claim 1 further comprises: Add diethylenetriamine pentaacetic acid to ultrapure water, then add ethanolamine in a 1:1 mass ratio, then pour into a stirring box and rotate the stirring rod to stir for 2 to 5 minutes to completely dissolve the diethylenetriamine pentaacetic acid; Add polyacrylic acid to the aqueous solution obtained in the previous step in the stirring box again, and rotate the stirring rod to stir for 1 to 2 minutes to completely dissolve the polyacrylic acid; The aqueous solution is obtained in the stirring box in the previous step, citric acid and glycolic acid are added to the aqueous solution again, and the stirring rod is slowly rotated to stir until the citric acid and glycolic acid are completely dissolved; Ethanolamine, citric acid and glycolic acid are added to the solution obtained from the stirring box in the previous step to adjust the pH value of the solution. After the pH value is adjusted to 1.5-2.5, an off-line chemical decontaminant for primary circuit equipment components of a pressurized water reactor nuclear power plant is obtained.

3. A decontamination device, characterized in that: The method for configuring a decontaminant for a pressurized water reactor nuclear power plant component according to claim 2 further comprises: A dispensing assembly (100) comprises an ultrasonic motor (101), a frame (102) arranged at the bottom end of the ultrasonic motor (101), a water pump (103) being installed at the top end of the frame (102), a dispensing tank (104) for containing a dosage raw material being installed on the side wall of the water pump (103), and a delivery pipe (105) being arranged at the bottom end of the dispensing tank (104); A decontamination component (200) comprises a water tank (201) arranged at the top of the frame (102); a decontamination component (202) for containing a decontamination agent is installed at the top of the water tank (201); the water tank (201) is used to introduce and store the decontamination agent mixed inside the decontamination component (202); and a cleaning component (203) for decontaminating a workpiece using the decontamination agent is arranged at the top of the decontamination component (202).

4. The decontamination device according to claim 3, characterized in that: The dirt removing component (202) comprises a partition (202a) arranged inside the water tank (201), a raised plate (202b) for introducing the mixed dirt removing agent into the water tank (201) is installed at the top of the partition (202a), a telescopic cylinder (202c) is installed at the top of the raised plate (202b), and the top of the telescopic cylinder (202c) is connected to the frame (102).

5. The decontamination device according to claim 4, characterized in that: The dirt removing member (202) further comprises a baffle (202d) arranged at the end of the piston rod of the telescopic cylinder (202c), a storage rod (202e) is installed at the top end of the baffle (202d), and a cover plate (202f) is arranged on the circumferential side wall of the telescopic cylinder (202c).

6. The decontamination device according to claim 5, characterized in that: The top end of the cover plate (202f) is provided with a connecting plate (202g), the bottom end of the connecting plate (202g) is installed with a movable plate (202h), the bottom end of the movable plate (202h) passes through the cover plate (202f) and extends to the outside, so that the movable plate (202h) and the cover plate (202f) are connected in a sliding manner, and the top end of the cover plate (202f) is installed with a through groove (202i), the interior of the through groove (202i) is installed with a semicircular block (202j), and the side wall of the semicircular block (202j) is installed with a triangular block (202k) connected to the cover plate (202f).

7. The decontamination device according to claim 6, characterized in that: A stirring box (202l) for containing a decontaminant is installed at the top of the connecting plate (202g), a material guide pipe (202m) is installed at the top of the stirring box (202l), a servo motor (202n) is installed at the top of the material guide pipe (202m), a fixed shaft (202p) is installed at the output end of the servo motor (202n), and a stirring rod (202q) is installed on the side wall of the fixed shaft (202p).

8. The decontamination device according to claim 7, characterized in that: The cleaning component (203) comprises a spray pipe (203a) arranged inside the water tank (201); a water pipe (203b) is installed at the bottom end of the cover plate (202f); a branch pipe (203c) is installed on the side wall of the water pipe (203b); and nozzles (203d) are installed at the bottom ends of the branch pipe (203c) and the water pipe (203b).

9. The decontamination device according to claim 8, characterized in that: The cleaning component (203) comprises a water inlet pipe (203e) arranged at the top end of the water guide pipe (203b), an inclined groove (203f) is arranged inside the water inlet pipe (203e), a water wheel (203g) is arranged at the bottom end of the water inlet pipe (203e), and a toggle block (203h) is installed at the bottom end of the water wheel (203g).

10. The decontamination device according to claim 9, characterized in that: The toggle block (203h) comprises a connecting plate (203h-1) arranged at the bottom end of the water wheel (203g), a connecting shaft (203h-2) is installed inside the connecting plate (203h-1), a toggle plate (203h-3) is sleeved on the side wall of the connecting shaft (203h-2), a torsion spring (203h-4) is arranged between the connecting shaft (203h-2) and the toggle plate (203h-3), a fixing rod (203h-5) is installed on the side wall of the toggle plate (203h-3), a limiting plate (203h-6) is installed on the bottom end of the fixing rod (203h-5), a moving rod (203h-7) is installed on the bottom end of the limiting plate (203h-6), and a telescopic spring (203h-8) is sleeved on the side wall of the moving rod (203h-7).

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