CN115213160A - Nuclear reactor control rod drive mechanism belt cleaning device - Google Patents
Nuclear reactor control rod drive mechanism belt cleaning device Download PDFInfo
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- CN115213160A CN115213160A CN202210661954.1A CN202210661954A CN115213160A CN 115213160 A CN115213160 A CN 115213160A CN 202210661954 A CN202210661954 A CN 202210661954A CN 115213160 A CN115213160 A CN 115213160A
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- driving rod
- framework
- cleaning
- nuclear reactor
- drive mechanism
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- 238000004140 cleaning Methods 0.000 title claims abstract description 84
- 230000007246 mechanism Effects 0.000 title claims abstract description 38
- 238000005406 washing Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 13
- 238000005192 partition Methods 0.000 claims description 10
- 239000003599 detergent Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005202 decontamination Methods 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000003588 decontaminative effect Effects 0.000 description 16
- 230000000712 assembly Effects 0.000 description 7
- 238000000429 assembly Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
- B08B2203/007—Heating the liquid
-
- 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
Landscapes
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention belongs to the technical field of nuclear power station reactor maintenance, and particularly relates to a cleaning device for a control rod driving mechanism of a nuclear reactor. The washing tank comprises a washing tank body, a driving rod framework and a movable assembly framework, wherein the washing tank body is of a thin-wall rectangular long-cylinder structure, the bottom of the washing tank body is of a conical structure, through holes are formed in two symmetrical side walls, and cylindrical pins are mounted in the through holes; the driving rod framework or the moving assembly framework is inserted into the cleaning tank and limited by the cylindrical pin; the driving rod grillwork is used for cleaning a driving rod; the mobile assembly grillwork is used for cleaning the mobile assembly. The invention can improve the cleaning effect of the driving mechanism moving assembly or the driving rod and avoid dead angles in the decontamination process; the cleaning efficiency is improved, the time for the work is shortened, the irradiated dose of workers is reduced, and the guarantee is provided for the subsequent rotary work of the movable assembly or the driving rod.
Description
Technical Field
The invention belongs to the technical field of nuclear power station reactor maintenance, and particularly relates to a cleaning device for a control rod driving mechanism of a nuclear reactor.
Background
The control rod driving mechanism is a component of an actuating mechanism of a reactor control system and a safety protection system and is also an important component of a pressure boundary of a reactor loop. The control rod driving mechanism can keep the flat power distribution of the reactor in the operation process through an optimal rod lifting program; the reactivity change caused by temperature coefficient, poisoning effect and the like is compensated, and the reactivity is effectively controlled; when the load changes, the reactor power is adjusted to follow the load change; when the reactor protection is triggered, all control rod assemblies fall to the lowest part of the reactor core within 1.2-4s, and the safe operation of the nuclear power station is ensured. The control rod drive mechanism is therefore a critical device that directly affects the normal operation and safety and reliability of a nuclear reactor, and its importance is self-evident.
The control rod driving mechanism used in the first stage of the nuclear power station is a stepping electromagnetic driving mechanism and consists of five parts, namely an electromagnet assembly, a pressure-resistant shell, a moving assembly, a driving rod and a position indicator. All components in the pressure-resistant shell, such as a lifting coil immovable magnetic pole, a lifting coil movable magnetic pole, a locking coil upper movable magnetic pole, a locking coil lower movable magnetic pole, a fixed coil immovable magnetic pole, a fixed coil movable magnetic pole, a driving rod, a movable pawl cam, an immovable pawl cam and the like are exposed in a reactor coolant, operate in a loop environment with high temperature, high pressure, strong radiation and boric acid solution for a long time, and have higher radioactivity after being in service for a period of time. After the lifting and inserting group test in the full-automatic mode is finished by certain overhaul, a protection test is carried out, 03-36 control rods stay at the lower limit position after a shutdown command is sent, and the rest control rods all fall into the bottom of the reactor core. The reason why the bundle of control rods cannot fall freely is considered by analysis afterwards as foreign particles in the primary coolant pass through the observation window of the moving assembly shell and enter the gap between the movable magnetic pole of the fixed coil of the moving assembly and the moving assembly shell, so that the immovable pawl cam cannot fall completely, and the control rod and the drive rod cannot fall freely.
To ensure that the reactor-mounted control rod drive mechanism performs its designed function, the drive rods and movements need to be decontaminated and cleaned during disassembly and overhaul. The washing and decontamination work of original Russian design actuating lever and moving assembly is accomplished in 2 fixed decontamination buckets of control rod drive mechanism decontamination system, the decontamination mode is that traditional demineralized water circulation heating washes, there is obvious shade or dead angle in the decontamination process, and single decontamination bucket only can wash 4 actuating levers or 1 moving assembly simultaneously, the duration of every washing cycle is nearly 3 hours including the operating time of loading and unloading washing element, however, single unit of nuclear power station has 103 control rod actuating levers and 103 moving assemblies, adopt present fixed decontamination bucket, there is the decontamination cycle length, personnel's exposure dose is big, inefficiency and the not good scheduling problem of effect, seriously influence upper assembly drive mechanism's gyration work. Domestic related companies have also developed control rod drive mechanism drive rod or moving assembly cleaning devices, such as the cleaning tank disclosed in the patent with the publication number CN 207271709U, in which the cleaning mode is to use an ultrasonic vibrating plate for decontamination, but the device has obvious disadvantages: (1) The heat preservation layer and the ultrasonic vibration plate are arranged on the inner wall of the cleaning tank, the space in the cleaning tank is occupied, and a larger cleaning tank is needed when the same number of driving rods or moving assemblies are cleaned; on the other hand, the ultrasonic vibration plate is arranged in the cleaning tank, and the ultrasonic vibrator can directly contact the driving rod or the moving assembly to damage the internal motion mechanisms of the two parts; (2) The height of the driving rod grillwork and the height of the moving assembly grillwork are high, the distance between the positioning disc and the fixing ring on the grillwork is long, when the driving rod or the moving assembly is inserted into the positioning disc and the fixing ring by using a crane, the centering is difficult and time-consuming, manual auxiliary guiding is needed in most of time, the irradiated dose of a person is high, and the cleaning efficiency is further improved.
Therefore, there is still a need to provide a cleaning device for a nuclear reactor control rod driving mechanism according to the characteristics of the driving mechanism, so as to improve the cleaning effect and efficiency of a decontamination tank of the control rod driving mechanism, and ensure that the flushing operation of the driving rod and the moving assembly does not cause other work delays, which results in the delay of main line work for non-main line work.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a cleaning device for the control rod driving mechanism of the nuclear reactor, aiming at the problems and the defects of the existing decontamination device and decontamination mode of the control rod driving mechanism, so that the cleaning effect of a moving assembly or a driving rod of the driving mechanism is improved, and dead angles in the decontamination process are avoided; the cleaning efficiency is improved, the time for the work is shortened, the irradiated dose of workers is reduced, and the guarantee is provided for the subsequent rotary work of the movable assembly or the driving rod.
The technical scheme adopted by the invention is as follows:
a cleaning device for a control rod driving mechanism of a nuclear reactor comprises a cleaning tank, a driving rod framework and a moving assembly framework, wherein the main body of the cleaning tank is of a thin-wall rectangular long cylinder structure, the bottom of the cleaning tank is of a conical structure, through holes are formed in two symmetrical side walls, and cylindrical pins are mounted in the through holes; a driving rod framework or a moving assembly framework is inserted into the cleaning tank and is limited by the cylindrical pin; the driving rod grillwork is used for cleaning a driving rod; the mobile assembly grillwork is used for cleaning the mobile assembly.
The top of the cleaning tank is provided with a tank cover; the outer wall is wrapped with a heat-insulating cover plate; and four corners inside the box body are respectively provided with a guide angle steel for fixing the head end and the tail end of the driving rod grillwork or the movable assembly grillwork and providing guidance for the hoisting of the driving rod grillwork or the movable assembly grillwork.
The upper part of the cleaning tank is provided with a reflux port, an overflow port, a liquid inlet and an exhaust port; the lower part is provided with a liquid level meter connecting pipe; the side wall of the conical structure at the bottom is provided with a thermometer connecting pipe, and the conical opening part is provided with a liquid outlet.
The conical structure at the bottom of the cleaning tank is arranged on a vertical supporting leg, and the vertical supporting leg is connected with the ground through an anchor bolt; the outer wall of the heat-insulating cover plate is sleeved with an annular hoop.
The upper part of the cleaning tank is also provided with a cable connecting pipe, an ultrasonic vibrator is fixed on the outer surface of the cleaning tank through a screw, and the mounting position of the ultrasonic vibrator corresponds to the position of a mounted driving rod framework or a mounted moving assembly framework; the ultrasonic vibrator is connected with the cable connecting pipe.
The driving rod grid comprises three driving rod grid clapboards and supporting columns, supporting column mounting holes are formed in four corners of each driving rod grid clapboard, the supporting columns are mounted in the mounting hole, and lifting rings are arranged at the tops of the supporting columns; and a plurality of driving rod placing holes are uniformly formed in the driving rod grid clapboard and used for placing the driving rods.
The movable assembly grid comprises a movable assembly grid clapboard and support columns, wherein support column mounting holes are formed in four corners of the movable assembly grid, the support columns are mounted in the mounting holes, and lifting rings are arranged at the tops of the support columns; the movable assembly framework is uniformly provided with a plurality of movable assembly placing holes for placing the movable assemblies.
The edges of the driving rod placing hole and the moving component placing hole are chamfered and strictly coaxial.
And detergent overflowing channels are arranged around the driving rod grid clapboard.
Detergent overflowing channels are arranged on the periphery of the moving assembly grillwork clapboard, and a drain hole is formed in the center of the moving assembly grillwork clapboard.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
1) The decontamination mode is changed from the traditional demineralized water circulation heating washing decontamination mode to ultrasonic cleaning decontamination mode, strong hydraulic impact is generated by utilizing the ultrasonic cavitation effect of ultrasonic waves in tank liquor, foreign matter particles are loosened or separated from the driving rod or the moving assembly, no obvious dead angle exists in the decontamination process, and the decontamination effect is improved.
2) The ultrasonic vibrator is arranged on the outer surface of the cleaning tank, the internal capacity of the cleaning tank is large, more driving rods and moving assemblies can be cleaned by the cleaning tank with the same specification, and in addition, the ultrasonic vibrator can be prevented from being directly contacted with a workpiece to be cleaned, so that the internal structure of the driving mechanism is prevented from being damaged;
3) After the transformation, a single system can simultaneously clean 18 control rod driving rods or 4 moving assemblies, compared with the prior art, the cleaning efficiency can be obviously improved, the cleaning period is shortened by about 30h, and the exposure dose of workers is reduced by about 5msv;
4) The optimized driving rod grillwork and the optimized moving assembly grillwork are placed on the upper portion of the cleaning tank through cylindrical pins, so that the hoisting centering work is easier.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front view of a control rod drive mechanism cleaning apparatus;
FIG. 2 is a top view of the control rod drive mechanism cleaning apparatus;
FIG. 3 is a schematic view of the mounting of the drive bar grid;
FIG. 4 isbase:Sub>A schematic view of the internal structure of FIG. 3 taken along line A-A;
FIG. 5 is a schematic view of the mounting of the mobile assembly grid;
FIG. 6 is a schematic view of the internal structure of FIG. 5 taken along line B-B;
FIG. 7 is a schematic view of a drive rod lattice;
FIG. 8 is a schematic view of a moving assembly grid;
in the figure: 1-a groove cover; 2-a cleaning tank; 3-a reflux port; 4-heat preservation cover plate; 5-hoop holding; 6-thermometer adapter; 7-vertical support legs; 8-a liquid outlet; 9-liquid level meter connection pipe; 10-an overflow port; 11-a liquid inlet; 12-an exhaust port; 13-cable connection; 14-a drive rod hoist; 15-a drive bar grid; 16-cylindrical pins; 17-a drive rod; 18-an ultrasonic vibrator; 19-guide angle steel; 20-drive rod placement holes; 21-a support post mounting hole; 22-a flow-through channel; 23-moving the assembly grid; 24-a moving assembly; 25-hydrophobic pores; 26-moving the assembly placement hole; 27-a hoisting ring; 28-a support bar; 29-drive bar grid spacer; 30-moving the assembly grid spacer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but 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 "third" 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 otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art. As shown in fig. 1 to 8, the cleaning device for the control rod driving mechanism of the nuclear reactor provided by the invention comprises a cleaning tank 2, a driving rod lattice 15 and a moving assembly lattice 23. The cleaning tank 2 is a thin-wall rectangular long cylinder structure and is formed by splicing two stainless steel plates, and a quick-opening tank cover 1 is arranged at the top of the cleaning tank 2 and is closed at any time; a cylindrical pin 16 is arranged at the upper part of the cleaning tank 2, and can be used for positioning and bearing the weight of a driving rod framework 15 or a movable assembly framework 23 according to the maintenance work requirement; guide angle steel 19 for a grillwork is arranged in the cleaning tank 2 to fix the head end and the tail end of the grillwork and provide guidance for hanging the grillwork in and out; the bottom of the cleaning tank 2 is provided with a vertical supporting leg 7 which is connected with the ground through an anchor bolt, and the side direction of the vertical supporting leg is provided with an annular hoop 5, so that the cleaning tank 2 is reliable and firm; the cleaning tank 2 is provided with a reflux port 3, a thermometer connecting pipe 6, a liquid discharging port 8, a liquid level meter connecting pipe 9, an overflow port 10, a liquid inlet 11 and a cable connecting pipe 13 at different heights; a 10mm heat-insulating cover plate 4 is adhered outside the cleaning tank 2, so that the cleaning operation temperature is maintained within the range of 50-70 ℃; 300 ultrasonic vibrators 18 with the working frequency of 20kHz +/-3 kHz are symmetrically arranged outside the cleaning tank 2, so that the sound fields at all positions in the cleaning tank are uniformly distributed; the ultrasonic vibrator 18 is fixed on the outer surface of the cleaning tank 2 through a screw, so that the ultrasonic vibrator is convenient to mount and maintain quickly;
the driving rod grillage 15 is formed by connecting upper, middle and lower driving rod grillage clapboards 29 through supporting columns 28, hanging rings 27 are mounted at the top ends of the supporting columns for hoisting, 18 driving rod placing holes 20 are formed in each driving rod grillage clapboard 29, supporting column mounting holes 21 are formed in four corners of each driving rod grillage clapboard, the driving rod placing holes 20 are not shielded from each other so as to achieve the best decontamination effect and leave a hoisting space, and in addition, the driving rod placing holes 20 are strictly coaxial so as to accurately insert and place the driving rods 17;
the moving assembly grillwork 23 is formed by connecting upper, middle and lower moving assembly grillwork clapboards 30 through supporting columns 28, lifting rings 27 are mounted at the top ends of the supporting columns 28 and used for lifting, 4 moving assembly placing holes 26 are formed in each moving assembly grillwork clapboard 30, supporting column mounting holes 21 are formed in four corners of each moving assembly grillwork clapboard, and the moving assembly placing holes 26 are symmetrically arranged and strictly coaxial so as to be convenient for accurately guiding and placing the moving assemblies 24;
the detergent overflowing channels 22 are arranged on the peripheries of the driving rod grid partition 29 and the moving assembly grid partition 30, and the center of the moving assembly grid partition 30 is provided with the water drainage hole 25, so that the detergent can quickly flow to the lower part of the cleaning tank, and the cleaning effect is improved.
The edges of the driving rod placing hole 20 and the moving assembly placing hole 26 are chamfered, so that the driving rod 17 or the moving assembly 24 is prevented from rubbing with the partition plate to damage the sealing surface.
Taking a driving rod cleaning process as an example, the working principle of the cleaning device for the control rod driving mechanism provided by the invention is as follows:
opening the tank cover 1, connecting a hanging ring 27 on the driving rod grillwork 15 with a crane through a sling, and then placing the hanging ring on a cylindrical pin 16 in the cleaning tank 2; connecting the crane hook to the drive rod spreader 14 via a sling; moving a lifting hook of a crane to a storage point of the driving rod 17, and installing the driving rod lifting appliance 14 on the driving rod 17 after centering; after centering, the driving rod 17 is slowly inserted into the driving rod placing hole 20 until the driving rod lifting appliance 14 stably falls onto the driving rod grid partition plate 29, and manual auxiliary guiding is needed before the head of the driving rod 17 passes through the driving rod placing hole 20 on the lowermost partition plate; repeating the steps to finish the installation of 18 driving rods 17 in the cleaning tank 2; the tank cover 1 is closed, detergent is conveyed into the cleaning tank 2 through the liquid inlet 11, and the ultrasonic vibrator 18 is started to clean the driving rod 17 for 0.5-2 hours.
In particular, the above only describes the cleaning process of the driving rod 17, that is, the driving rod grillwork 15 is placed in the cleaning tank 2 to clean the driving rod 17, and similarly, the moving assembly grillwork 23 is placed in the same cleaning tank 2 to clean the moving assembly 24.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A nuclear reactor control rod drive mechanism belt cleaning device which characterized in that: the washing tank comprises a washing tank (2), a driving rod framework (15) and a movable assembly framework (23), wherein the main body of the washing tank (2) is of a thin-wall rectangular long-cylinder structure, the bottom of the washing tank is of a conical structure, through holes are formed in two symmetrical side walls, and cylindrical pins (16) are mounted in the through holes; a driving rod framework (15) or a moving assembly framework (23) is inserted into the cleaning tank (2) and limited by the cylindrical pin (16); the driving rod grillwork (15) is used for cleaning a driving rod (17); the mobile assembly grillwork (23) is used for cleaning the mobile assembly (24).
2. The nuclear reactor control rod drive mechanism cleaning apparatus of claim 1, wherein: the top of the cleaning tank (2) is provided with a tank cover (1); the outer wall is wrapped with a heat-insulating cover plate (4); and guide angle steels (19) are respectively arranged at four corners inside the driving rod framework (15) or the moving assembly framework (23) and are used for fixing the head end and the tail end of the driving rod framework (15) or the moving assembly framework (23) and providing guidance for hoisting in and hoisting out the driving rod framework (15) or the moving assembly framework (23).
3. The nuclear reactor control rod drive mechanism cleaning apparatus of claim 1, wherein: the upper part of the cleaning tank (2) is provided with a reflux port (3), an overflow port (10), a liquid inlet (11) and an exhaust port (12); the lower part is provided with a liquid level meter connecting pipe (9); the side wall of the conical structure at the bottom is provided with a thermometer connecting pipe (6), and the conical opening part is provided with a liquid outlet (8).
4. The nuclear reactor control rod drive mechanism cleaning apparatus of claim 2, wherein: the conical structure at the bottom of the cleaning tank (2) is arranged on a vertical supporting leg (7), and the vertical supporting leg (7) is connected with the ground through an anchor bolt; the outer wall of the heat-insulating cover plate (4) is sleeved with an annular hoop (5).
5. The nuclear reactor control rod drive mechanism cleaning apparatus of claim 1, wherein: the upper part of the cleaning tank (2) is also provided with a cable connecting pipe (13), an ultrasonic vibrator (18) is fixed on the outer surface of the cleaning tank (2) through a screw, and the mounting position of the ultrasonic vibrator (18) corresponds to the position of a mounted driving rod framework (15) or a mounted moving assembly framework (23); the ultrasonic vibrator (18) is connected with the cable connecting pipe (13).
6. The nuclear reactor control rod drive mechanism cleaning apparatus of claim 1, wherein: the driving rod grillage (15) comprises three driving rod grillage clapboards (29) and supporting columns (28), supporting column mounting holes (21) are formed in four corners of each driving rod grillage clapboard (29), the supporting columns (28) are mounted in the mounting holes (21), and hanging rings (27) are arranged at the tops of the supporting columns (28); the driving rod framework clapboard (29) is uniformly provided with a plurality of driving rod placing holes (20) for placing the driving rods (17).
7. The nuclear reactor control rod drive mechanism cleaning apparatus of claim 1, wherein: the mobile assembly grid (23) comprises mobile assembly grid partitions (30) and support columns (28), support column mounting holes (21) are formed in four corners of the mobile assembly grid (23), the support columns (28) are mounted in the mounting holes (21), and lifting rings (27) are arranged at the tops of the support columns (28); the moving component framework (23) is uniformly provided with a plurality of moving component placing holes (26) for placing the moving components (24).
8. The nuclear reactor control rod drive mechanism washing apparatus of claim 6 or 7, wherein: the driving rod placing hole (20) and the moving component placing hole (26) are chamfered at the edges and are strictly coaxial.
9. The nuclear reactor control rod drive mechanism cleaning apparatus of claim 6, wherein: and detergent overflowing channels (22) are arranged on the periphery of the driving rod grid partition plate (29).
10. The nuclear reactor control rod drive mechanism cleaning apparatus of claim 7, wherein: detergent overflowing channels (22) are arranged on the periphery of the moving assembly framework partition board (30), and a water drainage hole (25) is formed in the center of the moving assembly framework partition board (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210661954.1A CN115213160B (en) | 2022-06-13 | Nuclear reactor control rod driving mechanism cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210661954.1A CN115213160B (en) | 2022-06-13 | Nuclear reactor control rod driving mechanism cleaning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115213160A true CN115213160A (en) | 2022-10-21 |
| CN115213160B CN115213160B (en) | 2024-06-11 |
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| CN205110246U (en) * | 2015-10-30 | 2016-03-30 | 上海秦元能源科技有限公司 | Modular decontamination case |
| CN107520185A (en) * | 2017-07-31 | 2017-12-29 | 浙江博凡动力装备股份有限公司 | Nuclear power station CRDM drive rod or moving assembly cleaning groove mechanism |
| CN215198601U (en) * | 2020-11-11 | 2021-12-17 | 江苏核电有限公司 | Decontamination device for control rod driving mechanism for nuclear power station |
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