CN110189841B - Reuse method for old thrust section and extension section of nuclear power plant reactor core measurement system - Google Patents
Reuse method for old thrust section and extension section of nuclear power plant reactor core measurement system Download PDFInfo
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- CN110189841B CN110189841B CN201910505441.XA CN201910505441A CN110189841B CN 110189841 B CN110189841 B CN 110189841B CN 201910505441 A CN201910505441 A CN 201910505441A CN 110189841 B CN110189841 B CN 110189841B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/017—Inspection or maintenance of pipe-lines or tubes in nuclear installations
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
- G21C17/108—Measuring reactor flux
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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
Abstract
The invention discloses a reuse method of old parts of a thrust section and an extension section of a nuclear power plant reactor core measurement system. The reuse method of the old parts of the thrust section and the extension section of the nuclear power station reactor core measurement system separates the welding line of the thrust section and the welding line of the extension section and the welding line of the thrust section and the welding line of the finger sleeve by a machining treatment means, and simultaneously machines and treats the sizes of the relevant welding grooves of the thrust section and the extension section until the sizes meet the requirements of a welding process, thereby meeting the requirements of field use of spare parts of the thrust section and the extension section. The reuse method of the old thrust section and the old extension section of the nuclear power station reactor core measurement system can improve the utilization rate of spare parts of the thrust section and the extension section, greatly reduce the maintenance cost, ensure that the work of cutting and shifting the thimble tube can be successfully carried out, and ensure that the overhaul of a power plant is smoothly carried out.
Description
Technical Field
The invention relates to the field of nuclear power plant reactor core measuring systems, in particular to a reuse method of old parts of a thrust section and an extension section of a nuclear power plant reactor core measuring system.
Background
The nuclear power plant core measurement system functions to provide reactor core neutron flux, reactor fuel assembly coolant temperature, and reactor pressure vessel water level measurement data. The neutron flux measurement function is accomplished through 50 dactylotheca pipes that insert fuel assembly and its inside neutron flux measurement probe, and the dactylotheca pipe plays the effect of protection detector as the passageway that reactor core neutron flux detector removed, and neutron flux detector can remove at the dactylotheca intraduct, and dactylotheca outer wall and a return circuit coolant direct contact belong to a return circuit pressure boundary. In the last 80 th century foreign nuclear power stations had the feedback of thimble tube wear and leakage, and at present, domestic nuclear power stations generally adopt the eddy current inspection mode to inspect the thimble tube wear condition. The wearing mechanism of the thimble tubes is that each thimble tube is not provided with other fixing devices except the sealing section and the sealing element, so that the thimble tubes in the reactor core are continuously collided and rubbed with the guide tube and the support structure to form a wearing defect under the influence of the transverse impact and vibration of the coolant of the reactor.
For the defect that the wearing capacity of the wall thickness of the finger sleeve is larger than 50 percent, a small section of the finger sleeve is generally extracted to carry out tube cutting shift treatment, namely, the original wearing position is avoided, so that the finger sleeve is worn at the changed position, and the same position is prevented from being worn all the time. In the process of pipe cutting and displacement processing, spare parts of the thrust section and the extension section are needed, the spare parts can only be purchased from France at present, the problems of long supply period, high price and the like exist, the reserve quantity of the spare parts of the thrust section and the extension section of each nuclear power station is limited, and the borrowing difficulty of strategic spare parts is high. In order to improve the utilization rate of spare parts of the thrust section and the extension section, overcome the shortage of spare parts, save the maintenance cost, and urgently develop the reuse technology of old parts of the thrust section and the extension section of the nuclear power plant reactor core measuring system.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a method for reusing old thrust and extension pieces of a nuclear power plant reactor core measuring system, which has simple and reasonable steps, can improve the utilization rate of spare parts of a thrust section and an extension section, greatly reduce the maintenance cost, ensure that the work of cutting a pipe by using a finger sleeve is successfully carried out, and ensure that the overhaul of a power plant is smoothly carried out.
In order to achieve the aim, the invention provides a method for reusing old thrust and extension parts of a nuclear power plant reactor core measurement system, which comprises the following steps: step 1: clamping a thrust collar of the thrust section by using a three-jaw chuck on a lathe, starting the lathe to rotate the assembly of the thrust section and the extension section, checking and confirming that the circumference has no abnormal jumping, and performing centering adjustment if the circumference has abnormal jumping; step 2: positioning the middle position of a welding seam between the thrust section and the extension section from the tail end of the extension section to the thrust ring side of the thrust section, turning the welding flesh on the outer surface of the welding seam between the thrust section and the extension section by using a lathe tool, and removing the welding flesh protruding out of the outer surfaces of the thrust section and the extension section; and step 3: cutting downwards by a sharp knife to remove the welding meat between the thrust section and the extension section; and 4, step 4: loosening the three-jaw chuck, and taking down the assembly of the thrust section and the extension section; clamping the short pipe of the finger sleeve by using a three-jaw chuck, clamping the groove position of the extension section by using a wrench, and shaking the wrench to separate and release the thrust section from the extension section to complete the separation of the welding line of the thrust section and the extension section; and 5: clamping a thrust ring of the thrust section by using a three-jaw chuck on a lathe, starting the lathe to rotate the thrust section and the short sleeve pipe, checking to confirm that the circumference has no abnormal jumping, and performing centering adjustment if the circumference has abnormal jumping; step 6: drilling towards the side of the thrust ring of the thrust section at the welding seam of the thrust section and the finger sleeve on a lathe by using a drill bit, and removing the welding seam welding meat of the thrust section and the finger sleeve; and 7: loosening the three-jaw chuck, taking down the thrust section and the thimble tube, and drawing out the thimble tube to complete the separation of the thrust section from the weld joint of the thimble tube; and 8: grinding the inner side of the tail end of the thrust section into a chamfer by using a turning tool on a lathe; and step 9: grinding the outer side of the tail end of the thrust section into a chamfer by using a turning tool on a lathe; step 10: grinding a chamfer angle at the position of the welding groove of the outer diameter of the thrust section and the extension section by using a turning tool on a lathe; step 11: grinding a chamfer angle at the position of the welding groove of the outer diameter of the extension section and the thrust section by using a turning tool on a lathe; step 12: and removing the machining burrs.
In a preferred embodiment, in step 2: and turning the welding flesh on the outer surface of the welding seam between the thrust section and the extension section by using turning tools in the areas with the width of 2mm on the left and right sides of the middle of the welding seam between the thrust section and the extension section.
In a preferred embodiment, in step 3: the fillet removal was accomplished with a 60 ° pointed knife cut down.
In a preferred embodiment, in step 6: and (3) drilling to the side of the thrust ring of the thrust section at the welding joint of the thrust section and the finger sleeve by using a drill bit with the diameter phi of 8.5mm on a lathe until the depth is 1.1 mm.
In a preferred embodiment, in step 8: and grinding the inner side of the tail end of the thrust section by using a lathe tool to form a chamfer of 1.1mm multiplied by 45 degrees on a lathe.
In a preferred embodiment, in step 9: and grinding the outer side of the tail end of the thrust section by using a lathe tool to form a chamfer of 0.5mm multiplied by 45 degrees on a lathe.
In a preferred embodiment, in step 10: and grinding a chamfer of 1.5mm multiplied by 45 degrees by a turning tool at the position of the welding groove of the outer diameter of the thrust section and the extension section on a lathe.
In a preferred embodiment, in step 11: and grinding a chamfer of 1.5mm multiplied by 45 degrees at the position of the welding groove of the outer diameter of the extension section and the thrust section by using a lathe tool on a lathe.
Compared with the prior art, the reuse method of the old parts of the thrust section and the extension section of the nuclear power plant reactor core measurement system has the following beneficial effects: the reuse method of the old parts of the thrust section and the extension section of the nuclear power station reactor core measurement system has high implementation success rate, and can improve the utilization rate of spare parts of the thrust section and the extension section. The technology can greatly reduce the maintenance cost, and can ensure that the work of cutting and shifting the dactylotheca tube is successfully carried out under the condition that spare parts of the thrust section and the extension section are not stored enough or are difficult to borrow, thereby ensuring the smooth overhaul of a power plant. The old part reuse technology can be popularized and applied to various applicable nuclear power stations, and has important significance in guaranteeing the overhaul progress of the power plant and reducing cost and improving efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a thrust section and extension section assembly component of a reuse method of old thrust section and extension section parts of a nuclear power plant core measurement system according to a first embodiment of the invention.
Fig. 2 is a schematic structural diagram of a thrust section and an extension section assembly thrust section of a reuse method of old thrust section and extension section parts of a nuclear power plant core measurement system according to a first embodiment of the invention.
Fig. 3 is a schematic structural diagram of an extension section of a thrust section and extension section assembly of a reuse method of old thrust section and extension section parts of a nuclear power plant core measurement system according to a first embodiment of the invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
The technical core of the reuse method of the old parts of the thrust section and the extension section of the nuclear power plant reactor core measurement system according to the preferred embodiment of the invention is that the thrust section is separated from the welding line of the extension section and the welding line of the thrust section and the welding line of the thimble tube by a machining treatment means, and the sizes of the relevant welding grooves of the thrust section and the extension section are machined until the sizes meet the requirements of a welding process, so that the field use requirements of spare parts of the thrust section and the extension section are met.
The method for reusing the old thrust section and extension section parts of the nuclear power plant core measurement system specifically comprises the following steps:
the preconditions are as follows: the thimble tubes have been cut and the thrust and extension assembly has been radioactive decontaminated.
Step 1: clamping a thrust ring with the diameter phi of 36mm in a thrust section on a lathe by using a three-jaw chuck, starting the lathe to rotate the assembly of the thrust section and the extension section, checking to confirm that the circumference has no abnormal jumping, and performing centering adjustment if the circumference has abnormal jumping;
as shown in fig. 1 to 3, the thrust and extension assembly includes: thimble 1, thrust section 2 and extension 3. The tail end of the thimble tube 1 is connected with the tail end of the thrust section 2 through a welding seam, and the extension section 3 is connected with the thrust section 2 through a welding seam.
Step 2: positioning from the tail end of the extension section to the 74.0mm position of the phi 36mm thrust ring side of the thrust section, wherein the position is between the thrust section and the 4mm welding seam of the extension section, turning the welding meat on the outer surface of the welding seam between the thrust section and the extension section by using turning tools in the areas with 2mm width (the width of the welding meat is 4mm) at the left and right sides of the middle of the welding seam, removing the welding meat protruding out of the outer surfaces of the phi 22mm of the outer diameters of the thrust section and the extension section, and processing to the circumference size of phi 22.3 mm;
and step 3: the welding positions of the thrust section and the extension section are chamfered at 1.5mm multiplied by 45 degrees. When the welding seams of the thrust section and the extension section are separated, the situation that the follow-up groove needs to be ground and polished and the cutting force is prevented from being overlarge in the machining process is considered, the position is located from the tail end of the extension section to the position 74.0mm of the phi 36mm thrust ring side of the thrust section, the position is located between the thrust section and the welding seams of the extension section, a 60-degree sharp knife is used for downward cutting, the first cutting depth is 1.3mm, and the follow-up feeding amount of each time is 0.1 mm. Cutting the spare parts subjected to pipe cutting and displacement welding to the depth of 1.5mm, and removing the welding meat; for welding spare parts in the original factory, the welding meat can be removed after cutting to the depth of 1.6 mm;
and 4, step 4: loosening the three-jaw chuck, and taking down the assembly of the thrust section and the extension section; clamping the short pipe of the thimble sleeve by using a three-jaw chuck, clamping the position of a groove with the width of 10mm of the extension section by using a 17# wrench, and shaking the wrench to separate and release the thrust section from the extension section to complete the separation of the welding line of the thrust section and the extension section;
and 5: clamping a thrust ring with the thrust section phi of 36mm on a lathe by using a three-jaw chuck, starting the lathe to rotate the thrust section and the short sleeve pipe, checking to confirm that the circumference has no abnormal jumping, and performing centering adjustment if the circumference has abnormal jumping;
step 6: drilling to the side of a thrust ring with the diameter phi of 36mm at the position of a welding seam 5 between the thrust section and the finger sleeve by using a drill bit with the diameter phi of 8.5mm on a lathe until the depth is 1.1mm, and removing the welding seam welding meat of the thrust section and the finger sleeve;
and 7: loosening the three-jaw chuck, taking down the thrust section and the short fingerstall tube, and drawing out the short fingerstall tube to complete the separation of the thrust section from the welding seam of the fingerstall tube;
and 8: the inner side of the tail end of the thrust section is a chamfer of 1.1mm multiplied by 45 degrees, the outer side is a chamfer of 0.5mm multiplied by 45 degrees, and the inner chamfer and the outer chamfer are filled by welding meat after being welded with the fingerstall. Grinding the inner side of the tail end of the thrust section by using a lathe tool to form a chamfer of 1.1mm multiplied by 45 degrees on a lathe;
and step 9: grinding a chamfer of 0.5mm multiplied by 45 degrees on the outer side of the tail end of the thrust segment by a lathe tool on a lathe, and avoiding the reduction of the length of the thrust segment as much as possible in the cutting process;
step 10: welding the groove position of the thrust section with the outer diameter phi 22mm and the extension section on a lathe, and grinding a chamfer of 1.5mm multiplied by 45 degrees by using a lathe tool;
step 11: welding the groove position of the extension section with the outer diameter phi of 22mm and the thrust section on a lathe, and grinding a chamfer of 1.5mm multiplied by 45 degrees by using a lathe tool;
step 12: and removing the machining burrs. And the separation of the welding line of the thrust section and the extension section and the welding line of the thrust section and the fingerstall tube is finished.
According to the technical scheme, the cutting depth, the drilling depth and other data are summarized according to the size requirement of the welding groove, the size requirement of the part drawing and the optimized parameters obtained by the practical successful practice of the actual machining treatment, and the processed thrust section and extension section spare parts can meet the design requirement and the welding requirement of the parts and have usability. 12 sets of old spare parts are renovated in the second round of overhaul of the No. 2 unit of the urban harbor nuclear power plant, wherein one set of old spare parts is unsuccessful due to the fact that the previous welding and fusion are too deep (manual welding and the phenomenon of individual fusion is too deep), so that the operation errors of personnel are eliminated, and the success rate can reach 91.7%. The thrust section and the extension section spare parts which are successfully renovated by using the technical scheme are applied to the field of the No. 2 machine of the urban harbor nuclear power plant, no abnormity exists until now after the application, and the reliability of the old part reuse technology is verified through practice.
In summary, the reuse method of the old parts of the thrust section and the extension section of the nuclear power station reactor core measuring system can improve the utilization rate of spare parts of the thrust section and the extension section, greatly reduce the maintenance cost, ensure that the shift work of the cutting pipe of the finger sleeve is successfully carried out, and ensure that the overhaul of a power plant is smoothly carried out.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (1)
1. A reuse method for old pieces of a thrust section and an extension section of a nuclear power station reactor core measurement system is characterized by comprising the following steps:
step 1: clamping a thrust collar of the thrust section by using a three-jaw chuck on a lathe, starting the lathe to rotate the assembly of the thrust section and the extension section, checking and confirming that the circumference has no abnormal jumping, and performing centering adjustment if the circumference has abnormal jumping;
step 2: positioning the middle position of a welding seam between the thrust section and the extension section from the tail end of the extension section to the thrust ring side of the thrust section, turning the welding flesh on the outer surface of the welding seam between the thrust section and the extension section by using a lathe tool, and removing the welding flesh protruding out of the outer surfaces of the thrust section and the extension section;
and step 3: cutting downwards by a sharp knife to remove the welding meat between the thrust section and the extension section;
and 4, step 4: loosening the three-jaw chuck, and taking down the assembly of the thrust section and the extension section; clamping the short pipe of the finger sleeve by using a three-jaw chuck, clamping the groove position of the extension section by using a wrench, and shaking the wrench to separate and release the thrust section from the extension section to complete the separation of the welding line of the thrust section and the extension section;
and 5: clamping a thrust ring of the thrust section by using a three-jaw chuck on a lathe, starting the lathe to rotate the thrust section and the short sleeve pipe, checking to confirm that the circumference has no abnormal jumping, and performing centering adjustment if the circumference has abnormal jumping;
step 6: drilling towards the side of the thrust ring of the thrust section at the welding seam of the thrust section and the finger sleeve on a lathe by using a drill bit, and removing the welding seam welding meat of the thrust section and the finger sleeve;
and 7: loosening the three-jaw chuck, taking down the thrust section and the thimble tube, and drawing out the thimble tube to complete the separation of the thrust section from the weld joint of the thimble tube;
and 8: grinding the inner side of the tail end of the thrust section into a chamfer by using a turning tool on a lathe;
and step 9: grinding the outer side of the tail end of the thrust section by using a lathe tool to form a chamfer of 0.5mm multiplied by 45 degrees on a lathe;
step 10: grinding a chamfer of 1.5mm multiplied by 45 degrees by a turning tool at the position of the welding groove of the outer diameter of the thrust section and the extension section on a lathe;
step 11: grinding a chamfer of 1.5mm multiplied by 45 degrees by a lathe tool at the position of the welding groove of the outer diameter of the extension section and the thrust section on the lathe;
step 12: removing machining burrs;
wherein, in the step 2: turning the welding meat on the outer surface of the welding seam between the thrust section and the extension section by using turning tools in the areas with the width of 2mm on the left and right sides of the middle of the welding seam between the thrust section and the extension section;
wherein, in the step 3: cutting downwards by a 60-degree sharp knife to finish the removal of the welding meat;
wherein, in the step 6: drilling to the side of the thrust ring of the thrust section at the welding joint of the thrust section and the finger sleeve by using a drill bit with the diameter phi of 8.5mm on a lathe until the drilling depth is 1.1 mm;
wherein, in the step 8: and grinding the inner side of the tail end of the thrust section by using a lathe tool to form a chamfer of 1.1mm multiplied by 45 degrees on a lathe.
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Families Citing this family (3)
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| CN111103135A (en) * | 2019-12-05 | 2020-05-05 | 福建福清核电有限公司 | Nuclear reactor hydrodynamic pressure type main pump mechanical seal reusability inspection method |
| CN111667931A (en) * | 2020-05-08 | 2020-09-15 | 福建福清核电有限公司 | Reactor pressure vessel neutron flux measurement channel seal assembly and replacement method thereof |
| CN113458715A (en) * | 2021-05-21 | 2021-10-01 | 岭澳核电有限公司 | Thimble tube cutting and shifting method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5138754A (en) * | 1988-12-27 | 1992-08-18 | Combustion Engineering, Inc. | Double gripper tube puller |
| CN103862093A (en) * | 2012-12-17 | 2014-06-18 | 核动力运行研究所 | Guiding casing pipe underwater aqueous medium hydraulic shearing device |
| CN105427908A (en) * | 2014-09-10 | 2016-03-23 | 中国广核集团有限公司 | Nuclear power plant nuclear reactor neutron flux detection system |
| CN105513657A (en) * | 2015-12-14 | 2016-04-20 | 中广核工程有限公司 | Nuclear power plant integrated in-core instrumentation assembly |
| CN206230130U (en) * | 2016-12-02 | 2017-06-09 | 厦门松兴智能机器人有限公司 | Stainless-steel pipe welding special equipment |
| CN207255306U (en) * | 2017-09-01 | 2018-04-20 | 广西防城港核电有限公司 | Counterboring apparatus for nuclear power plant |
| CN109175540A (en) * | 2018-11-24 | 2019-01-11 | 鹤山市金利鑫源厨卫设备科技有限公司 | A kind of steel bar cutting equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2821176A1 (en) * | 2013-07-02 | 2015-01-07 | Siemens VAI Metals Technologies GmbH | Device for moving an arrangement for cutting and welding metal strips ; Methof of cutting and welding using such device |
| CN108015490B (en) * | 2017-11-27 | 2019-05-24 | 广西防城港核电有限公司 | The method for blocking of thermocouple pile conduit |
-
2019
- 2019-06-12 CN CN201910505441.XA patent/CN110189841B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5138754A (en) * | 1988-12-27 | 1992-08-18 | Combustion Engineering, Inc. | Double gripper tube puller |
| CN103862093A (en) * | 2012-12-17 | 2014-06-18 | 核动力运行研究所 | Guiding casing pipe underwater aqueous medium hydraulic shearing device |
| CN105427908A (en) * | 2014-09-10 | 2016-03-23 | 中国广核集团有限公司 | Nuclear power plant nuclear reactor neutron flux detection system |
| CN105513657A (en) * | 2015-12-14 | 2016-04-20 | 中广核工程有限公司 | Nuclear power plant integrated in-core instrumentation assembly |
| CN206230130U (en) * | 2016-12-02 | 2017-06-09 | 厦门松兴智能机器人有限公司 | Stainless-steel pipe welding special equipment |
| CN207255306U (en) * | 2017-09-01 | 2018-04-20 | 广西防城港核电有限公司 | Counterboring apparatus for nuclear power plant |
| CN109175540A (en) * | 2018-11-24 | 2019-01-11 | 鹤山市金利鑫源厨卫设备科技有限公司 | A kind of steel bar cutting equipment |
Non-Patent Citations (2)
| Title |
|---|
| M310堆型的核电指套管堵管工艺;江浩仁;《山东工业技术》;20190426;201页第1栏第1段-第2栏第18段 * |
| 堆芯指套管磨损_堵塞机理与预防性维修策略;柳正钧;《核动力工程》;20040430;264-266 * |
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