A nuclear power plant reactor core module transport vehicle and method

Abstract

The present application belongs to the technical field of modular small reactor technology, and particularly relates to a nuclear power plant reactor core module transport tool and method. The tool comprises a reactor core module package and a tool for preventing steam generator movement. The tool has the beneficial effect of preventing movement. The reactor core module is internally provided with a tool for preventing movement of the steam generator during transportation, which can effectively prevent movement of the steam generator during transportation, thereby effectively reducing the risk of bumps, scratches and other risks of the steam generator, avoiding damage to the weld between the reactor pressure vessel and the steam generator, and having high safety properties.

Description

Technical Field

[0001] This invention belongs to the field of modular small modular reactor technology, specifically relating to a transportation tool and method for the core module of a nuclear power plant reactor. Background Technology

[0002] Modular integrated small modular reactor (SMR) technology features miniaturization, modularity, high integration, and passive operation. It offers high safety, short construction cycles, and flexible deployment. As a clean distributed energy source, it can provide electricity while simultaneously serving multiple purposes such as seawater desalination, district heating / cooling, and industrial heating. It is suitable for various scenarios including industrial parks, islands, mining areas, and self-supplied energy for high-energy-consuming enterprises, and has become an important direction for the future development of nuclear power technology.

[0003] The reactor pressure vessel is an important component of the reactor primary coolant pressure boundary. It is used to contain the entire reactor core and the high-temperature, high-pressure coolant, and to prevent the leakage of radioactive materials.

[0004] The steam generator is an important component of the coolant pressure boundary. It is used to transfer the heat carried out by the reactor coolant from the core to the secondary side, provide superheated steam that meets the requirements for the secondary loop system, and remove residual heat from the core during shutdown and accident conditions.

[0005] In traditional large nuclear power plant pressurized water reactors, the reactor pressure vessel and steam generator, as some of the most important main equipment in a nuclear power plant, are manufactured and transported separately until they arrive at the nuclear power plant site for installation. During transportation, both the reactor pressure vessel and steam generator are in a horizontal position and are secured to separate saddles with steel wire ropes and fixing beams.

[0006] Based on the functional characteristics of modular integrated small modular reactors (SMRs), the reactor pressure vessel must enclose the steam generator, together forming the core module of the SMR. The reactor pressure vessel and steam generator need to be welded together during the manufacturing stage to form the core module and be shipped together, significantly increasing transportation requirements; traditional horizontal transportation methods are no longer suitable. Therefore, a transportation method suitable for the core module of the modular integrated reactor is needed, while also ensuring high safety. Summary of the Invention

[0007] The purpose of this invention is to provide a transportation tool and method for nuclear power plant reactor core modules. By using a vertically placed and fixed transportation method, and tools to prevent the steam generator inside the core module from moving, it can provide strong support for the overall vertical transportation of the reactor core module, and enable the transportation of modular small reactor core modules to have efficient safety attributes.

[0008] The technical solution of the present invention is as follows: a transportation tool for the core module of a nuclear power plant reactor, including packaging of the core module of the reactor and tooling to prevent the steam generator from moving.

[0009] The reactor core module package includes a nitrogen filling device, a lifting lug, a frame support platform, a cylindrical top screw, a fixing rod, and an accelerometer. The accelerometer and the nitrogen filling device are installed on the frame support platform. The lifting lug is located on the top of the reactor core module. The cylindrical top screw and the fixing rod are respectively connected to the reactor core module and fixed to the frame support platform.

[0010] The fixture for preventing steam generator movement includes an anti-movement support body, a nylon anti-collision cover, a guide nylon plate, guide wheels, a fixing assembly, an upper fixing device, an upper clamping structure, an upper tensioning structure, a lower tensioning structure, a bottom support structure, and a back support structure for the evaporator enclosure. The anti-movement support body is installed outside the reactor pressure vessel, and the nylon anti-collision cover is installed inside the reactor pressure vessel. Guide wheels are installed on the anti-movement support body, and the guide nylon plate is installed on the corresponding internal structure of the reactor pressure vessel. A fixing assembly is installed at the bottom of the anti-movement support body. An upper fixing device and an upper clamping structure are installed on the upper part of the steam generator, and a bottom support structure for the steam generator is installed at the bottom of the steam generator. An upper tensioning structure, a lower tensioning structure, and a back support structure for the evaporator enclosure are provided between adjacent steam generators.

[0011] A method for transporting the core module of a nuclear power plant reactor includes the following steps: Step 1: Installation of special fixtures to prevent steam generator from shifting; Step 2: Installation of the core module packaging; Step 3: Transportation and dismantling of the reactor core module.

[0012] Step 1 includes: Step 11: Assemble the anti-channeling support body outside the reactor pressure vessel; Step 12: Place the nylon impact shield inside the reactor pressure vessel and install it at intervals on the steam generator to protect the steam generator near the center of the reactor pressure vessel. Step 13: Before the entire anti-slip support body is lifted and placed inside the reactor pressure vessel, install the guide wheels on the anti-slip support body; Step 14: Install the guide nylon plate on the corresponding internal structure of the reactor pressure vessel. When the anti-channeling support body falls inside the reactor pressure vessel, it is guided by the guide nylon plate to avoid collision with the internal structure of the reactor pressure vessel. Step 15: After the anti-slip support body is hoisted into the reactor pressure vessel and positioned, the bottom rotating fixing component is clamped and fixed to the corresponding internal structure of the reactor pressure vessel. After the anti-slip support body is installed, the nylon guide plate is removed. Step 16: Secure the steam generator. The securing of the steam generator includes the bottom support structure of the steam generator, the upper fixing device and the upper clamping structure of the steam generator, the upper tensioning structure and the lower tensioning structure between adjacent steam generators, and the back support structure of the evaporator enclosure.

[0013] Step 2 includes: Step 21: Place the reactor core module vertically on the frame support platform and connect and fix the two using the cylinder top screw and fixing tie rod. Install the accelerometer in the middle of the frame support platform, and then install the sealing devices of the main pump pipe, steam chamber pipe and nuclear auxiliary connection in the reactor core module. Step 22: Install the tooling to prevent the steam generator from shifting during transportation into the reactor core module and install the accelerometer on top of the steam generator. Step 23: After completing the installation of the sealing device at the top flange, install the nitrogen filling equipment on the frame support platform and provide nitrogen protection.

[0014] Step 3 includes: Step 31: During transportation including hoisting, the above equipment shall be operated as a whole, placed on the transport equipment, and the frame support 6 shall be tied and fixed to the transport equipment; Step 32: After arriving at the destination, disconnect the frame support platform from the transport equipment and transport the entire equipment to the operating platform; Step 33: Gradually remove the sealing devices at the top flange, the tooling to prevent the steam generator from shifting during transportation, and the sealing devices of the main pump connection / steam chamber connection / nuclear auxiliary connection. The accelerometer installed on the top of the steam generator shall be retained. Step 34: After the reactor core module is ready for final installation, remove the top screws and fixing rods of the cylinder to loosen the reactor core module from the frame support platform. The accelerometer and nitrogen filling equipment installed in the middle of the frame support platform will remain on the frame support platform. Step 35: The reactor core module is hoisted vertically to its final installation position, completing the entire transportation process.

[0015] The beneficial effects of this invention are as follows: 1) It has the feature of preventing movement. The reactor core module is equipped with tooling to prevent the steam generator from moving during transportation, which can effectively prevent the steam generator from moving during transportation, thereby effectively reducing the risk of collisions and scratches to the steam generator, and avoiding damage to the weld between the reactor pressure vessel and the steam generator, thus having high safety attributes; 2) It has the feature of real-time speed monitoring. Accelerometers are installed on the top of the steam generator inside the reactor pressure vessel and in the middle of the frame support platform, which can be used to detect the transportation acceleration borne by the reactor core module during transportation, providing strong support for the overall transportation safety of the reactor core module; 3) It has the feature of vertical transportation. The reactor core module, which integrates many functions, is no longer suitable for conventional horizontal transportation. Using the frame support platform to place and fix the reactor core module, it can be transported in a vertical state; 4) It has the feature of overall transportation. Through the combined application of tooling and frame support platform and other equipment, the high requirements of integrated reactor core modules in transportation can be met. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the reactor core module packaging. Figure 2 A schematic diagram of the tooling used to prevent steam generator from moving around. Figure 3 for Figure 2 A partial schematic diagram; Figure 4 This is a schematic diagram showing the installation location of the accelerometer on top of the steam generator.

[0017] In the diagram: 1 Reactor core module, 2 Tooling to prevent steam generator runaway, 3 Sealing device, 4 Nitrogen filling equipment, 5 Lifting lug, 6 Frame support platform, 7 Cylinder top screw, 8 Fixing tie rod, 9 Accelerometer, 10 Reactor pressure vessel, 11 Steam generator, 12 Anti-runaway support body, 13 Nylon anti-collision shield, 14 Guide nylon plate, 15 Guide wheel, 16 Fixing assembly, 17 Upper fixing device, 18 Upper clamping structure, 19 Upper tensioning structure, 20 Lower tensioning structure, 21 Bottom support structure, 22 Back support structure of enclosure. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] This invention provides a transportation tool for the core module of a nuclear power plant reactor, mainly for vertical transportation, including packaging of the core module of the reactor and tooling 2 to prevent steam generator movement.

[0020] like Figure 1As shown, the reactor core module package includes a nitrogen filling device 4, a lifting lug 5, a frame support platform 6, a cylindrical top screw 7, a fixing rod 8, and an accelerometer 9. The accelerometer 9 and the nitrogen filling device 4 are installed on the frame support platform 6. The lifting lug 5 is set on the top of the reactor core module. The cylindrical top screw 7 and the fixing rod 8 are respectively connected to the reactor core module and fixed on the frame support platform 6.

[0021] like Figure 2 As shown, the tooling 2 for preventing the steam generator from moving includes an anti-movement support body 12, a nylon anti-collision cover 13, a guide nylon plate 14, a guide wheel 15, a fixing assembly 16, an upper fixing device 17, an upper pressing structure 18, an upper tensioning structure 19, a lower tensioning structure 20, a bottom support structure 21, and a back support structure 22 for the enclosure.

[0022] The steam generator 11) is installed inside the reactor pressure vessel 10) vessel assembly and welded together to form the reactor core module 1). The reactor core module 1) is equipped with a tooling 2 to prevent the steam generator 11) from moving during transportation. The external part is equipped with a sealing device 3) and a nitrogen filling device 4) at the opening. The flange sealing device is equipped with a lifting lug 5 on the top. The reactor core module 1) is placed on the frame support platform 6) in a vertical position. The reactor core module 1) is connected and fixed to the frame support platform 6) by means of devices such as the cylinder top screw 7) and the fixing tie rod 8), and is transported as a whole (including hoisting).

[0023] Meanwhile, accelerometers 9 are installed on the top of the steam generator 11 inside the reactor pressure vessel 10 and in the middle of the frame support platform to detect the transport acceleration experienced by the reactor core module 1) during transport.

[0024] The present invention provides a method for transporting a core module of a nuclear power plant reactor, comprising the following steps: Step 1: Installation of special fixtures to prevent steam generator from shifting, including: Step 11: Assemble the anti-slip support body 12 outside the reactor pressure vessel 10.

[0025] Step 12: Place the nylon impact shield 13 inside the reactor pressure vessel 10 and install it at intervals on the steam generator 11 to protect the steam generator 11 near the center of the reactor pressure vessel 10.

[0026] Step 13: Before the entire anti-slip support body 12 is lifted and placed inside the reactor pressure vessel 10, the guide wheel 15 is first installed on the anti-slip support body 12.

[0027] Step 14: Install the guide nylon plate 14 on the corresponding internal structure of the reactor pressure vessel 10. When the anti-slip support body 12 falls inside the reactor pressure vessel 10, it is guided by the guide nylon plate 14 to avoid collision with the internal structure of the reactor pressure vessel 10.

[0028] Step 15: After hoisting the anti-slip support body 12 into place inside the reactor pressure vessel 10, rotate and fix the bottom fixing assembly 16 to the corresponding internal structure of the reactor pressure vessel 10. After the anti-slip support body 12 is installed, remove the nylon guide plate 14.

[0029] Step 16: Secure the steam generator 11. The securing of the steam generator 11 includes the bottom support structure 21 of the steam generator, the upper fixing device 17 and the upper clamping structure 18 of the steam generator, the upper tensioning structure 19 and the lower tensioning structure 20 between adjacent steam generators, and the back support structure 22 of the evaporator enclosure.

[0030] Step 2: Installation of the core module package Step 21: Place the reactor core module 1 vertically on the frame support platform 6, and connect and fix the two using devices such as the cylinder top screw 7 and fixing rod 8. Install the accelerometer 9 in the middle of the frame support platform 6. Then, install the sealing devices 3 on the main pump pipe, steam chamber pipe, nuclear auxiliary pipe, and other parts of the core module 1.

[0031] Step 22: Install the special tooling 2 to prevent the steam generator 11 from shifting during transportation into the core module 1, and install the accelerometer 9 on the top of the steam generator 11.

[0032] Step 23: After installing the sealing device 3 at the top flange, install the nitrogen filling equipment 4 on the frame support platform 6 and fill it with nitrogen for protection.

[0033] Step 3: Transportation and dismantling of the reactor core module Step 31: During transportation (including hoisting), the above equipment shall be operated as a whole. When placing it on transport equipment, such as transport vehicles or transport ships, the frame support platform 6 shall be tied and secured to the transport equipment. During transportation (including hoisting), the route and road conditions shall be planned in advance, the transport speed and acceleration of the transport equipment shall be strictly controlled, and contingency plans shall be prepared for adverse weather conditions.

[0034] Step 32: After the equipment arrives at its destination, the frame support platform 6 is released from the transport equipment, and the entire equipment is transported to the operating platform.

[0035] Step 33: Gradually remove the sealing device 3 at the top flange, the special tooling 2 to prevent the steam generator 11 from shifting during transportation, and the sealing devices 3 at the main pump connection / steam chamber connection / nuclear auxiliary connection, etc. The accelerometer 9 installed on the top of the steam generator 11 is retained.

[0036] Step 34: After the reactor core module 1 meets the final installation conditions, remove the cylinder top screw 7 and fixing rod 8 and other devices to loosen the reactor core module 1 from the frame support platform 6. The accelerometer 9 and nitrogen filling equipment 4 installed in the middle of the frame support platform 6 are still retained on the frame support platform 6.

[0037] Step 35: The reactor core module 1 is hoisted vertically to its final installation position, completing the entire transportation process.

Claims

1. A transport vehicle for the core module of a nuclear power plant reactor, characterized in that: This includes packaging for the reactor core module and tooling to prevent steam generator movement.

2. The nuclear power plant reactor core module transport vehicle as described in claim 1, characterized in that: The reactor core module package includes a nitrogen filling device, a lifting lug, a frame support platform, a cylindrical top screw, a fixing rod, and an accelerometer. The accelerometer and the nitrogen filling device are installed on the frame support platform. The lifting lug is located on the top of the reactor core module. The cylindrical top screw and the fixing rod are respectively connected to the reactor core module and fixed to the frame support platform.

3. The nuclear power plant reactor core module transport vehicle as described in claim 1, characterized in that: The fixture for preventing steam generator movement includes an anti-movement support body, a nylon anti-collision cover, a guide nylon plate, guide wheels, a fixing assembly, an upper fixing device, an upper clamping structure, an upper tensioning structure, a lower tensioning structure, a bottom support structure, and a back support structure for the evaporator enclosure. The anti-movement support body is installed outside the reactor pressure vessel, and the nylon anti-collision cover is installed inside the reactor pressure vessel. Guide wheels are installed on the anti-movement support body, and the guide nylon plate is installed on the corresponding internal structure of the reactor pressure vessel. A fixing assembly is installed at the bottom of the anti-movement support body. An upper fixing device and an upper clamping structure are installed on the upper part of the steam generator, and a bottom support structure for the steam generator is installed at the bottom of the steam generator. An upper tensioning structure, a lower tensioning structure, and a back support structure for the evaporator enclosure are provided between adjacent steam generators.

4. A method for transporting the core module of a nuclear power plant reactor, characterized in that, Includes the following steps: Step 1: Installation of special fixtures to prevent steam generator from shifting; Step 2: Installation of the core module packaging; Step 3: Transportation and dismantling of the reactor core module.

5. The method for transporting a nuclear power plant reactor core module as described in claim 4, characterized in that, Step 1 includes: Step 11: Assemble the anti-channeling support body outside the reactor pressure vessel; Step 12: Place the nylon impact shield inside the reactor pressure vessel and install it at intervals on the steam generator to protect the steam generator near the center of the reactor pressure vessel. Step 13: Before the entire anti-slip support body is lifted and placed inside the reactor pressure vessel, install the guide wheels on the anti-slip support body; Step 14: Install the guide nylon plate on the corresponding internal structure of the reactor pressure vessel. When the anti-channeling support body falls inside the reactor pressure vessel, it is guided by the guide nylon plate to avoid collision with the internal structure of the reactor pressure vessel. Step 15: After the anti-slip support body is hoisted into the reactor pressure vessel and positioned, the bottom rotating fixing component is clamped and fixed to the corresponding internal structure of the reactor pressure vessel. After the anti-slip support body is installed, the nylon guide plate is removed. Step 16: Secure the steam generator. The securing of the steam generator includes the bottom support structure of the steam generator, the upper fixing device and the upper clamping structure of the steam generator, the upper tensioning structure and the lower tensioning structure between adjacent steam generators, and the back support structure of the evaporator enclosure.

6. The method for transporting a nuclear power plant reactor core module as described in claim 4, characterized in that, Step 2 includes: Step 21: Place the reactor core module vertically on the frame support platform and connect and fix the two using the cylinder top screw and fixing tie rod. Install the accelerometer in the middle of the frame support platform, and then install the sealing devices of the main pump pipe, steam chamber pipe and nuclear auxiliary connection in the reactor core module. Step 22: Install the tooling to prevent the steam generator from shifting during transportation into the reactor core module and install the accelerometer on top of the steam generator. Step 23: After completing the installation of the sealing device at the top flange, install the nitrogen filling equipment on the frame support platform and provide nitrogen protection.

7. A method for transporting a core module of a nuclear power plant reactor as described in claim 4, characterized in that, Step 3 includes: Step 31: During transportation including hoisting, the above equipment shall be operated as a whole, placed on the transport equipment, and the frame support 6 shall be tied and fixed to the transport equipment; Step 32: After arriving at the destination, disconnect the frame support platform from the transport equipment and transport the entire equipment to the operating platform; Step 33: Gradually remove the sealing devices at the top flange, the tooling to prevent the steam generator from shifting during transportation, and the sealing devices of the main pump connection / steam chamber connection / nuclear auxiliary connection. The accelerometer installed on the top of the steam generator shall be retained. Step 34: After the reactor core module is ready for final installation, remove the top screws and fixing rods of the cylinder to loosen the reactor core module from the frame support platform. The accelerometer and nitrogen filling equipment installed in the middle of the frame support platform will remain on the frame support platform. Step 35: The reactor core module is hoisted vertically to its final installation position, completing the entire transportation process.

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