A debugging method for a lifting device for internal components of a small reactor in a nuclear power plant

Abstract

The present application provides a method for debugging an internal component hoist of a small reactor in a nuclear power plant, including: completing the load level adjustment of the internal component hoist outside the pressure vessel; conducting an experiment of hooking the hoist into the pressure vessel; removing the bottom guide groove of the internal component hoist; connecting the internal component hoist to the hanging basket assembly, and hoisting the hanging basket assembly into the pressure vessel; connecting the internal component hoist to the clamping cylinder assembly, and hoisting the clamping cylinder assembly into the pressure vessel; adjusting the adjustment block; test-installing the clamping cylinder assembly positioning key; connecting the internal component hoist to the clamping cylinder assembly, and hoisting the clamping cylinder assembly out of the pressure vessel; adjusting the guide groove; connecting the internal component hoist to the combination of the clamping assembly and the clamping cylinder assembly, and hoisting the combination into the pressure vessel. The present application sets a method for debugging the internal component hoist by combining the particularities of the internal components and the internal component hoist of a small reactor, so as to solve the technical problem that the existing installation of the internal component hoist is not suitable for small reactors.

Description

Technical Field

[0001] The present application belongs to the technical field of construction of hoisting equipment for internal components of a nuclear power plant, and specifically relates to a debugging method for hoisting equipment for internal components of a small reactor in a nuclear power plant. Background Art

[0002] The internal components of the small pile technology demonstration project adopt the latest three-stage structure of "pressing cylinder assembly + pressing assembly + hanging basket assembly", and the internal component hoist adopts a double-layer structure of "inner ring + outer ring". During the commissioning of the internal component hoist, it was found that since the installation accuracy of the internal components of the small pile technology demonstration project is higher than that of previous nuclear power units and the hoist body structure is more complex, and the internal component hoist needs to adapt to 5 working conditions, the installation accuracy requirements of the internal component hoist have been greatly improved. The previous experience in installing the internal component hoist is no longer applicable to the small pile technology demonstration project, so it is necessary to study a new commissioning method for the internal component hoist. Summary of the invention

[0003] In view of this, the present application is dedicated to providing a method for debugging an in-core component lifting device for a small reactor in a nuclear power plant. By combining the particularities of the in-core components and the in-core component lifting devices of the small reactor, a new method for debugging the in-core component lifting device is set up to solve the technical problem that the existing experience in installing in-core component lifting devices is not suitable for small reactor technology demonstration projects.

[0004] The present application provides a method for debugging a hanger for a small reactor internal component of a nuclear power plant. The method comprises:

[0005] Step 1: Complete the load level adjustment of the internal component lifting device outside the pressure vessel to form an adjusted internal component lifting device;

[0006] Step 2: The adjusted internals lifting device is not connected to the internals to carry out an empty hook test of the lifting device into the pressure vessel;

[0007] Step 3, removing the bottom guide groove of the pile internal component lifting device tested in step 2;

[0008] Step 4, connecting the internals lifting device completed in step 3 to the hanging basket assembly, and hanging the hanging basket assembly into the pressure vessel;

[0009] Step 5, connecting the internal component lifting device completed in step 4 to the compression cylinder assembly with the simulated keyway, and lifting the compression cylinder assembly into the pressure vessel;

[0010] Step 6, adjusting the adjustment block of the pile internal component lifting fixture completed in step 5;

[0011] Step 7: Test-install the positioning key of the compression cylinder assembly;

[0012] Step 8, connecting the internal component lifting device completed in step 6 to the compression cylinder assembly, and lifting the compression cylinder assembly out of the pressure vessel;

[0013] Step 9, adjusting the guide groove of the internal component lifting device completed in step 8;

[0014] Step 10, connect the internal component lifting device completed in step 9 to the combination of the clamping assembly and the clamping cylinder assembly, and lift the combination into the pressure vessel;

[0015] Step 11, rechecking the position of the locating key of the compaction cylinder and rechecking the guide block of the internal component hanger;

[0016] Step 12, connecting the internal component hoist that has been re-inspected according to step 11 to the compression cylinder assembly, and lifting the compression cylinder assembly out of the pressure vessel;

[0017] Step 13: Grasp and clamp the internal component lifting device that has been re-inspected according to step 11, and re-inspect the position of the guide groove.

[0018] In a specific embodiment of the present application, in step 1, when the outer ring of the internal component hoist is stationary, the inner ring of the internal component hoist is used to connect the hanging basket assembly and lift it to a certain height, and the inner ring horizontality is adjusted by adjusting the inner ring counterweight. The internal component hoist is used to connect the hanging basket assembly and lift it to a certain height, at which time both the inner ring and the outer ring are lifted. Measure whether the horizontality of the hanging basket assembly flange is within the technical requirements. If it exceeds the technical requirements, level it by adding, removing, and moving the counterweight on the outer frame of the internal component hoist. After the horizontality of the hanging basket assembly flange meets the requirements, check whether the guide posts and guide grooves of the inner ring of the internal component hoist are operating normally without jamming.

[0019] In a specific embodiment of the present application, in step 2, the in-piler component hanger is separated from the hanging basket assembly, and the in-piler component hanger is hoisted to the pressure vessel through the cooperation of the guide block on the outer ring and the guide positioning bolt on the pressure vessel, so that the support of the outer ring completely falls on the flange surface of the main bolt hole of the pressure vessel. Measure the gap between the outer ring of the in-piler component hanger and the inner wall of the pressure vessel, and keep the gap uniform all around. Slowly lower the inner ring of the in-piler component hanger, measure the gap between the inner ring of the in-piler component hanger and the inner wall of the pressure vessel, and keep the gap uniform all around. Check whether the guide column and guide groove in the inner ring of the in-piler component hanger are operating normally without jamming. Then adjust the matching clearance between the guide block and the guide positioning bolt and keep it as uniform as possible.

[0020] In a specific embodiment of the present application, in step 3, the in-core component lifting device completed according to the test in step 2 is lifted away from the pressure vessel through the cooperation of the guide blocks on the outer ring and the guide positioning bolts on the pressure vessel, and the three guide grooves at the bottom layer of the in-core component lifting device are removed.

[0021] In a specific embodiment of the present application, in step 4, after the in-core component hoist is used to connect the hanging basket assembly and the horizontality of the hanging basket assembly is checked to be qualified, it is lifted and moved to the vicinity of the center of the pressure vessel, and the hanging basket assembly is hoisted into the pressure vessel by cooperating with the guide block on the outer ring and the guide positioning bolt on the pressure vessel. When the hanging basket assembly enters the cylinder of the pressure vessel, ensure that the gap between the hanging basket assembly and the inner wall of the cylinder of the pressure vessel is uniform. When the outer ring support of the in-core component hoist is completely dropped onto the flange surface of the main bolt hole of the pressure vessel, check whether the gap between the guide groove and the guide column is uniform. After the inspection is completed, the inner ring of the in-core component hoist is lowered. When the guide column of the in-core component hoist is only not separated from the penultimate guide groove, the position of the hanging basket assembly is fine-tuned by adjusting the three sets of adjustment devices on the hoist. After the adjustment is completed, continue to lower the inner ring of the in-core component hoist until the hanging basket assembly is in place.

[0022] In a specific embodiment of the present application, in step 5, the in-pile component hoist completed according to step 4 is lifted away from the pressure vessel by cooperating with the guide block on the outer ring and the guide positioning bolt on the pressure vessel, the in-pile component hoist is connected to the clamping cylinder assembly with a simulated keyway, and after checking that the horizontality of the clamping cylinder assembly is qualified, it is lifted and moved to the vicinity of the center of the pressure vessel, and the clamping cylinder assembly is lifted into the pressure vessel by cooperating with the guide block on the outer ring and the guide positioning bolt on the pressure vessel.

[0023] In a specific embodiment of the present application, in step 6, the position of the outer ring adjustment block is adjusted according to the completion status of step 5, so that the clearance between the outer ring adjustment block and the guide positioning bolt is uniform. After the clearance adjustment is completed, the guide block and the outer ring are bolted and fixed.

[0024] In a specific embodiment of the present application, in step 7, the positioning key of the compression cylinder assembly is pre-installed on the inner wall of the pressure vessel cylinder according to the adjustment result of step 6.

[0025] In a specific embodiment of the present application, in step 8, the in-pile component hoist is connected to the clamping cylinder assembly, and after checking that the horizontality of the clamping cylinder assembly is qualified, the clamping cylinder assembly is lifted out of the pressure vessel with the cooperation of the guide block on the outer ring and the guide positioning bolt on the pressure vessel.

[0026] In a specific embodiment of the present application, in step 9, the three guide grooves of the bottom layer of the in-pile component hanger are reinstalled. After the reinstallation is completed, the in-pile component hanger is lifted to the pressure vessel through the guide blocks on the outer ring and the guide positioning bolts on the pressure vessel. After the outer ring support completely falls on the flange surface of the main bolt hole of the pressure vessel, the inner ring of the in-pile component hanger is lowered to the flange surface of the hanging basket assembly and connected to the hanging basket assembly. The hanging basket assembly is slowly lifted inside the pressure vessel, and the inner ring guide column is adjusted when it passes through the three guide grooves of the top layer, so that the guide column and the guide groove meet the requirements. After the adjustment of the top layer is completed, continue to lift the hanging basket assembly, and adjust the positions of the remaining 6 layers of guide grooves according to the adjustment method of the bottom layer of guide grooves. After the adjustment is completed, the hanging basket assembly is repositioned inside the pressure vessel.

[0027] In a specific embodiment of the present application, in step 10, the in-core component hoist completed according to the test in step 9 is lifted away from the pressure vessel by cooperating with the guide blocks on the outer ring and the guide positioning bolts on the pressure vessel, and the combination consisting of the clamping cylinder assembly and the clamping assembly is connected using the in-core component hoist and checked for qualified horizontality, and then lifted and moved to the vicinity of the center of the pressure vessel, and the combination is lifted into the pressure vessel by cooperating with the guide blocks on the outer ring and the guide positioning bolts on the pressure vessel.

[0028] In a specific embodiment of the present application, in step 11, the gap between the keyway of the clamping cylinder assembly and the positioning key is checked according to the position of the combination, and the matching condition of the guide block and the guide positioning bolt in the outer ring is reviewed.

[0029] In a specific embodiment of the present application, in step 12, the clamping cylinder assembly and the clamping assembly are disassembled inside the pressure vessel, and the internal component hoist completed by the re-inspection in step 11 is hoisted to the pressure vessel through the guide block on the outer ring and the guide positioning bolt on the pressure vessel. After the outer ring support completely falls on the flange surface of the main bolt hole of the pressure vessel, the clamping cylinder assembly is connected, and the guide block on the outer ring cooperates with the guide positioning bolt on the pressure vessel to lift the clamping cylinder assembly out of the pressure vessel.

[0030] In a specific embodiment of the present application, in step 13, the in-core component hanger that has been re-inspected according to step 11 is hoisted onto the pressure vessel through the guide block on the outer ring and the guide positioning bolt on the pressure vessel. After the outer ring support completely falls on the flange surface of the main bolt hole of the pressure vessel, the inner ring of the in-core component hanger is lowered, and it is confirmed whether the matching state between the guide column and the guide groove of the inner ring of the in-core component hanger needs to be adjusted before the inner ring frame of the in-core component hanger can be smoothly positioned on the clamping assembly flange without jamming.

[0031] The beneficial effect of the technical solution of the present application is that by combining the latest three-section structure of "clamping cylinder assembly + clamping assembly + hanging basket assembly" of the in-pile components of the small-scale technology demonstration project and the double-layer structure of "inner ring + outer ring" of the in-pile component hoist, the guide block and guide groove of the in-pile component hoist are accurately positioned through the in-pile component loading and unloading work, so that the cooperation between the guide block in the outer ring and the guide positioning bolt of the pressure vessel and the guide column in the inner ring of the in-pile component hoist and the guide block meets the technical requirements, thereby ensuring the quality of the small-scale in-pile component construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The figure shows a flow chart of a method for debugging a lifting device for internal components of a small reactor in a nuclear power plant provided by an embodiment of the present application. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] At least one embodiment of the present application provides a method for debugging a core component hoist of a small reactor in a nuclear power plant, wherein the core component includes a clamping cylinder assembly, a clamping assembly and a hanging basket assembly, and the core component hoist includes a double-layer structure of an inner ring and an outer ring. It should be noted that a small reactor is also a small modular reactor. Figure 1 The debugging method of the nuclear power plant internal component lifting device includes the following steps 1 to 13.

[0035] Step 1: Complete the load level adjustment of the internal component lifting device outside the pressure vessel to form an adjusted internal component lifting device.

[0036] In step 1, when the outer ring of the internal component hoist does not move, use the inner ring of the internal component hoist to connect the hanging basket assembly and lift it to a certain height (it can be in a suspended state), and adjust the horizontality of the inner ring by adjusting the inner ring counterweight. Use the internal component hoist to connect the hanging basket assembly and lift it to a certain height (it can be in a suspended state), at which time both the inner ring and the outer ring are lifted. Measure whether the horizontality of the flange of the hanging basket assembly is within the technical requirements. If it exceeds the technical requirements, level it by adding, removing, and moving the counterweight on the outer frame of the internal component hoist. After the horizontality of the flange of the hanging basket assembly meets the requirements, check whether the guide columns and guide grooves of the inner ring of the internal component hoist are operating normally without jamming.

[0037] Step 2: Carry out an empty hook test of the adjusted in-pile component lifting device into the pressure vessel without connecting it to the in-pile component.

[0038] In step 2, separate the in-core component hoist from the hanging basket assembly, and hoist the in-core component hoist to the pressure vessel through the guide block on the outer ring and the guide positioning bolt on the pressure vessel, so that the support of the outer ring completely falls on the flange surface of the main bolt hole of the pressure vessel. Measure the gap between the outer ring of the in-core component hoist and the inner wall of the pressure vessel, and keep the gap uniform all around. Slowly lower the inner ring of the in-core component hoist, measure the gap between the inner ring of the in-core component hoist and the inner wall of the pressure vessel, and keep the gap uniform all around. Check whether the guide column and guide groove in the inner ring of the in-core component hoist are operating normally without jamming. Then adjust the matching clearance between the guide block and the guide positioning bolt and keep it as uniform as possible.

[0039] It should be noted that maintaining uniform clearances on all sides may mean maintaining substantially uniform clearances on all sides, or maintaining uniform clearances on all sides as much as possible.

[0040] Step 3: dismantle the bottom guide groove of the internal component lifting fixture completed in step 2.

[0041] In step 3, the in-core component lifting device completed in step 2 is lifted off the pressure vessel by cooperating the guide blocks on the outer ring with the guide positioning bolts on the pressure vessel, and the three guide grooves at the bottom layer of the in-core component lifting device are removed.

[0042] Step 4: Connect the internal component lifting device completed in step 3 to the hanging basket assembly, and hang the hanging basket assembly into the pressure vessel.

[0043] In step 4, use the in-core component hoist to connect the basket assembly and check that the basket assembly is level, then lift and move it to the vicinity of the center of the pressure vessel, and hoist the basket assembly into the pressure vessel by cooperating with the guide block on the outer ring and the guide positioning bolt on the pressure vessel. When the basket assembly enters the pressure vessel cylinder, the gap between the basket assembly and the inner wall of the pressure vessel cylinder should be uniform. When the outer ring support of the in-core component hoist is completely dropped onto the flange surface of the main bolt hole of the pressure vessel, check whether the gap between the guide groove and the guide column is uniform. After the inspection is completed, lower the inner ring of the in-core component hoist. When the guide column of the in-core component hoist is only not separated from the penultimate guide groove, fine-tune the position of the basket assembly by adjusting the three sets of adjustment devices on the hoist. After the adjustment is completed, continue to lower the inner ring of the in-core component hoist until the basket assembly is in place.

[0044] Step 5: Connect the internal component lifting device completed in step 4 to the clamping cylinder assembly with the simulated keyway, and lift the clamping cylinder assembly into the pressure vessel.

[0045] In step 5, the in-pile component lifting device is lifted away from the pressure vessel by cooperating with the guide blocks on the outer ring and the guide positioning bolts on the pressure vessel, the in-pile component lifting device is connected to the clamping cylinder assembly with a simulated keyway, and after checking that the horizontality of the clamping cylinder assembly is qualified, it is lifted and moved to the vicinity of the center of the pressure vessel, and the clamping cylinder assembly is lifted into the pressure vessel by cooperating with the guide blocks on the outer ring and the guide positioning bolts on the pressure vessel.

[0046] Step 6: Adjust the adjustment block of the internal component lifting fixture completed in step 5.

[0047] In step 6, the position of the outer ring adjustment block is adjusted according to the completion status of step 5, so that the clearance between the outer ring adjustment block and the guide positioning bolt is uniform. After the clearance adjustment is completed, the guide block and the outer ring are fastened with bolts.

[0048] Step 7: Test-install the positioning key of the clamping cylinder assembly.

[0049] In step 7, the positioning key of the compression cylinder assembly is pre-installed on the inner wall of the pressure vessel cylinder according to the adjustment result of step 6.

[0050] Step 8: Connect the internal component lifting device completed in step 6 to the compression cylinder assembly, and lift the compression cylinder assembly out of the pressure vessel.

[0051] In step 8, the internal component lifting device is connected to the compression cylinder assembly, and after checking that the compression cylinder assembly is level, the compression cylinder assembly is lifted out of the pressure vessel under the cooperation of the guide block on the outer ring and the guide positioning bolt on the pressure vessel.

[0052] Step 9: Adjust the guide groove of the internal component lifting fixture completed in step 8.

[0053] In step 9, the three guide grooves of the bottom layer of the in-core component lifting device are reinstalled. After the reinstallation is completed, the in-core component lifting device is lifted to the pressure vessel through the guide blocks on the outer ring and the guide positioning bolts on the pressure vessel. After the outer ring support completely falls on the flange surface of the main bolt hole of the pressure vessel, the inner ring of the in-core component lifting device is lowered to the flange surface of the hanging basket assembly and connected to the hanging basket assembly; the hanging basket assembly is slowly lifted inside the pressure vessel, and when the inner ring guide column passes through the three guide grooves of the top layer, the guide column and the guide groove are matched to meet the requirements (no jamming) by grinding, adding pads, etc. After the adjustment of the top layer is completed, continue to lift the hanging basket assembly, and adjust the positions of the remaining 6 layers of guide grooves according to the adjustment method of the bottom layer of guide grooves. After the adjustment is completed, the hanging basket assembly is repositioned inside the pressure vessel.

[0054] Step 10: Connect the internal component lifting device completed in step 9 to the combination of the clamping assembly and the clamping cylinder assembly, and lift the combination into the pressure vessel.

[0055] In step 10, the in-pillar component lifting device is lifted away from the pressure vessel by cooperating with the guide blocks on the outer ring and the guide positioning bolts on the pressure vessel, and then the combination consisting of the clamping cylinder assembly and the clamping assembly is connected and checked for levelness. Then, it is lifted and moved to the vicinity of the center of the pressure vessel, and the combination is lifted into the pressure vessel by cooperating with the guide blocks on the outer ring and the guide positioning bolts on the pressure vessel.

[0056] Step 11: Recheck the position of the locating key of the clamping cylinder and the guide block of the internal component hanger at the same time.

[0057] In step 11, check the clearance between the keyway of the clamping cylinder assembly and the positioning key according to the position of the union, and review the matching of the guide block and the guide positioning bolt in the outer ring, such as whether the clearance is uniform.

[0058] Step 12: Connect the internal component hoist that has been re-inspected according to step 11 to the compression cylinder assembly, and lift the compression cylinder assembly out of the pressure vessel.

[0059] In step 12, the clamping cylinder assembly and the clamping assembly are disassembled inside the pressure vessel, and the internal component hoist completed in step 11 is hoisted to the pressure vessel through the guide block on the outer ring and the guide positioning bolt on the pressure vessel. After the outer ring support completely falls on the flange surface of the main bolt hole of the pressure vessel, the clamping cylinder assembly is connected, and the guide block on the outer ring cooperates with the guide positioning bolt on the pressure vessel to lift the clamping cylinder assembly out of the pressure vessel.

[0060] Step 13: Grasp and clamp the internal component lifting device that has been re-inspected according to step 11, and re-inspect the position of the guide groove.

[0061] In step 13, the in-core component hoist that has been re-inspected according to step 11 is hoisted onto the pressure vessel through the guide block on the outer ring and the guide positioning bolt on the pressure vessel. After the outer ring support is completely dropped onto the flange surface of the main bolt hole of the pressure vessel, the inner ring of the in-core component hoist is lowered to confirm whether the matching state between the guide column and the guide groove of the inner ring of the in-core component hoist needs to be adjusted so that the inner ring frame of the in-core component hoist can be smoothly positioned on the clamping assembly flange without jamming.

[0062] For example, the matching state between the guide column and the guide groove of the inner ring of the internal component lifting device can be adjusted by grinding, adding a pad, etc.

[0063] In case of adjustment, the clamping assembly shall be lifted out of the pressure vessel, and the in-pile component lifting fixture shall be lifted into the pressure vessel to confirm whether the inner operating assembly of the lifting fixture can be smoothly positioned on the hanging basket assembly without jamming. If jamming occurs, repeat step 9, adjust the position of the guide groove on the in-pile component lifting fixture through the hanging basket assembly again, and use the clamping assembly for re-inspection again to ensure that the inner ring operating frame of the in-pile component lifting fixture can smoothly position the clamping assembly and the hanging basket assembly and lift them out of the pile.

[0064] The technical solution provided in the embodiment of the present application combines the latest three-section structure of "clamping cylinder assembly + clamping assembly + hanging basket assembly" of the in-pile components of the small-scale technology demonstration project and the double-layer structure of "inner ring + outer ring" of the in-pile component hoist. Through the in-pile component loading and unloading operations, the guide block and guide groove of the in-pile component hoist are precisely positioned, so that the cooperation between the guide block in the outer ring and the guide positioning bolt of the pressure vessel and the guide column in the inner ring of the in-pile component hoist and the guide block meets the technical requirements, thereby ensuring the quality of the small-scale in-pile component construction.

[0065] It should be noted that the combination of the various technical features in the embodiments of the present application is not limited to the combination described in the embodiments of the present application or the combination described in the specific embodiments, and all technical features described in the present application can be freely combined or combined in any way unless there is a contradiction between them.

[0066] As shown in the specification and claims, unless the context clearly indicates an exception, the words "a", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the term "comprising" only indicates that the steps and elements that have been clearly identified are included, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0067] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for debugging a lifting device for internal components of a small reactor in a nuclear power plant, characterized in that: include: Step 1: Complete the load level adjustment of the internal component lifting device outside the pressure vessel to form an adjusted internal component lifting device; Step 2: The adjusted internals lifting device is not connected to the internals to carry out an empty hook test of the lifting device into the pressure vessel; Step 3, removing the bottom guide groove of the pile internal component lifting device tested in step 2; Step 4, connecting the internals lifting device completed in step 3 to the hanging basket assembly, and hanging the hanging basket assembly into the pressure vessel; Step 5, connecting the internal component lifting device completed in step 4 to the compression cylinder assembly with the simulated keyway, and lifting the compression cylinder assembly into the pressure vessel; Step 6, adjusting the adjustment block of the pile internal component lifting fixture completed in step 5; Step 7: Test-install the positioning key of the compression cylinder assembly; Step 8, connecting the internal component lifting device completed in step 6 to the compression cylinder assembly, and lifting the compression cylinder assembly out of the pressure vessel; Step 9, adjusting the guide groove of the internal component lifting device completed in step 8; Step 10, connect the internal component lifting device completed in step 9 to the combination of the clamping assembly and the clamping cylinder assembly, and lift the combination into the pressure vessel; Step 11, rechecking the position of the locating key of the compaction cylinder and rechecking the guide block of the internal component hanger; Step 12, connecting the internal component hoist that has been re-inspected according to step 11 to the compression cylinder assembly, and lifting the compression cylinder assembly out of the pressure vessel; Step 13: Grasp and clamp the internal component lifting device that has been re-inspected according to step 11, and re-inspect the position of the guide groove.

2. The method for debugging a lifting device for internal components of a small reactor in a nuclear power plant according to claim 1, characterized in that: Step 1 includes: With the outer ring of the in-piler component hoist still, use the inner ring of the in-piler component hoist to connect the hanging basket assembly and lift it to a certain height, and adjust the horizontality of the inner ring by adjusting the inner ring counterweight; use the in-piler component hoist to connect the hanging basket assembly and lift it to a certain height, at which time both the inner and outer rings are lifted; measure whether the horizontality of the hanging basket assembly flange is within the technical requirements. If it exceeds the technical requirements, adjust it by adding, removing or moving the counterweight on the outer frame of the in-piler component hoist; after the horizontality of the hanging basket assembly flange meets the requirements, check whether the guide columns and guide grooves of the inner ring of the in-piler component hoist are operating normally without jamming.

3. The method for debugging a lifting device for internal components of a small reactor in a nuclear power plant according to claim 1, characterized in that: Step 2 includes: Separate the internal component lifting device from the hanging basket assembly, and hoist the internal component lifting device onto the pressure vessel by matching the guide block on the outer ring with the guide positioning bolt on the pressure vessel, so that the support of the outer ring completely falls on the main bolt hole flange surface of the pressure vessel; Measure the gap between the outer ring of the internal component lifting device and the inner wall of the pressure vessel, and keep the gap uniform all around; Slowly lower the inner ring of the internals lifting device, measure the gap between the inner ring of the internals lifting device and the inner wall of the pressure vessel, and keep the gap uniform all around; Check whether the guide column and guide groove in the inner ring of the internal component lifting device are operating normally without jamming; Then adjust the matching clearance between the guide block and the guide positioning bolt and keep it uniform.

4. The method for debugging a lifting device for internal components of a small reactor in a nuclear power plant according to claim 1, characterized in that: Step 3 includes: The in-core component lifting device completed in the test according to step 2 is lifted off the pressure vessel by cooperating the guide blocks on the outer ring with the guide positioning bolts on the pressure vessel, and the three guide grooves at the bottom layer of the in-core component lifting device are removed.

5. The method for debugging a lifting device for internal components of a small reactor in a nuclear power plant according to claim 1, characterized in that: Step 4 includes: After connecting the basket assembly with the internal component lifting device and checking that the basket assembly is level, lift and move it to the vicinity of the center of the pressure vessel, and hoist the basket assembly into the pressure vessel by matching the guide block on the outer ring with the guide positioning bolt on the pressure vessel; When the basket assembly enters the pressure vessel cylinder, ensure that the gap between the basket assembly and the inner wall of the pressure vessel cylinder is uniform. When the outer ring support of the internal component hoisting device completely falls on the flange surface of the main bolt hole of the pressure vessel, check whether the gap between the guide groove and the guide column is uniform; After the inspection is completed, the inner ring of the internal component hoist is lowered. When the guide column of the internal component hoist is only in the second-to-last guide groove, the position of the hanging basket assembly is fine-tuned by adjusting the three adjustment devices on the hoist; After the adjustment is completed, continue to lower the inner ring of the internal component lifting fixture until the basket assembly is in place.

6. The method for debugging a lifting device for internal components of a small reactor in a nuclear power plant according to claim 1, characterized in that: Step 5 includes: The in-pile component lifting device completed according to step 4 is lifted away from the pressure vessel by cooperating the guide block on the outer ring with the guide positioning bolt on the pressure vessel, and the in-pile component lifting device is connected to the clamping cylinder assembly with a simulated keyway, and after checking that the horizontality of the clamping cylinder assembly is qualified, it is lifted and moved to the vicinity of the center of the pressure vessel, and the clamping cylinder assembly is lifted into the pressure vessel by cooperating the guide block on the outer ring with the guide positioning bolt on the pressure vessel.

7. The method for debugging a lifting device for internal components of a small reactor in a nuclear power plant according to claim 1, characterized in that: Step 6 includes: Adjust the position of the outer ring adjustment block according to the completion status of step 5 so that the clearance between the outer ring adjustment block and the guide positioning bolt is uniform; After the clearance adjustment is completed, the guide block and the outer ring are fastened with bolts.

8. The method for debugging a lifting device for internal components of a small reactor in a nuclear power plant according to claim 1, characterized in that: Step 9 includes: Reinstall the three guide grooves at the bottom layer of the internal component lifting device. After the reinstallation is completed, the internal component lifting device is lifted onto the pressure vessel through the cooperation of the guide block on the outer ring and the guide positioning bolt on the pressure vessel; After the outer ring support completely falls to the flange surface of the main bolt hole of the pressure vessel, the inner ring of the internal component lifting device is lowered to the flange surface of the hanging basket assembly and connected with the hanging basket assembly; Slowly lift the hanging basket assembly inside the pressure vessel, and adjust the inner ring guide column when it passes through the three guide grooves on the top layer, so that the guide column and the guide groove meet the requirements; After the adjustment of the top layer is completed, continue to lift the hanging basket assembly, and adjust the positions of the remaining 6 layers of guide grooves according to the adjustment method of the bottom layer of guide grooves. After the adjustment is completed, the hanging basket assembly is repositioned inside the pressure vessel.

9. The method for debugging a lifting device for internal components of a small reactor in a nuclear power plant according to claim 1, characterized in that: Step 11 includes: Check the clearance between the keyway of the clamping cylinder assembly and the locating key according to the seating condition of the union, and recheck the fit between the guide block in the outer ring and the guide locating bolt.

10. A method for debugging a lifting device for internal components of a small reactor in a nuclear power plant according to any one of claims 1 to 9, characterized in that: Step 13 includes: The internal component lifting device that has been re-inspected according to step 11 is lifted onto the pressure vessel through the cooperation of the guide block on the outer ring and the guide positioning bolt on the pressure vessel; After the outer ring support completely falls onto the flange surface of the main bolt hole of the pressure vessel, the inner ring of the in-core component hanger is lowered to confirm whether it is necessary to adjust the matching state between the guide column and the guide groove of the inner ring of the in-core component hanger so that the inner ring frame of the in-core component hanger can be smoothly and smoothly positioned on the clamping assembly flange.

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