Installation method of fast reactor equipment

Abstract

The invention relates to the technical field of nuclear power plant design, and discloses an installation method of fast reactor equipment, which comprises the following steps: conveying a first group of components into a reactor building from a conveying channel at the top of the reactor building; conveying the second group of components into the reactor building from an equipment conveying channel of the reactor building; and assembling the first group of components and the second group of components to complete the installation of the fast reactor equipment. According to the installation method of the fast reactor equipment, the problems that the reactor container is low in installation efficiency, long in construction time and high in cost are solved or improved.

Description

Technical Field

[0001] This application relates to the technical field of nuclear power plant design, and particularly relates to an installation method for fast reactor equipment. Background Art

[0002] Under the "dual carbon" goal, the long-term development of nuclear energy poses new requirements for issues such as the supply guarantee of uranium resources and the safety management of spent fuel. Accelerating the development of fast reactors is the only way to meet new energy challenges, an important step in China's three-step nuclear energy development strategy of "thermal reactor - fast reactor - fusion reactor", and the development direction of advanced nuclear energy systems.

[0003] The million-kilowatt fast reactor project is a key step for China's fast reactor technology to move towards commercial application. While the power of the million-kilowatt fast reactor is increased, the scale and complexity of its equipment also increase accordingly. Considering factors such as reducing the floor area and construction cost, the nuclear island of the million-kilowatt fast reactor adopts a compact layout plan, and the reactor building is changed from square to circular, making the reactor building more compact. However, the compact layout makes the temporary storage and installation space for equipment in the reactor building hall relatively small, posing more stringent requirements for the equipment installation method.

[0004] Compared with pressurized water reactors, the pressure vessel of a pressurized water reactor is introduced through the equipment transportation channel of the reactor building after being manufactured by the manufacturer. However, some components of the reactor vessel of a fast reactor are relatively large in volume, such as in-vessel supports, fixed shields, plugs, and reactor vessel heads. These items cannot be introduced into the reactor building after installation and need to be installed inside the reactor building.

[0005] In related technologies, when installing the reactor vessel in a fast reactor, the first group of components with relatively small volume in the reactor vessel, such as main pumps, intermediate heat exchangers, etc., are transported from the equipment transportation channel to the reactor building for installation. The second group of components with relatively large dimensions in the reactor vessel, such as the fixed shield on the reactor vessel head, plug, and reactor vessel head, cannot be transported through the equipment transportation channel and need to transport their parts from the equipment channel to the reactor building for on-site assembly. Due to the reduction in the volume of the reactor building, it is not convenient to perform assembly inside the reactor building, and it affects the transportation and installation of other components, as well as the main construction of the reactor building, resulting in low installation efficiency, long construction time, and high cost of the reactor vessel. Summary of the Invention

[0006] In view of this, this application provides an installation method for fast reactor equipment to solve or improve the problems of low installation efficiency, long construction time, and high cost of the reactor vessel.

[0007] This application provides an installation method for fast reactor equipment, where the fast reactor equipment includes a first group of components and a second group of components, and the installation method includes:

[0008] Transport the first set of components from the conveying channel at the top of the reactor building to the interior of the reactor building;

[0009] Transport the second set of components from the equipment transportation channel of the reactor building to the interior of the reactor building;

[0010] Assemble the first set of components and the second set of components to complete the installation of the fast reactor equipment.

[0011] In this embodiment, the first set of components is large in size. The first set of components is transported from the conveying channel at the top of the reactor building to the interior of the reactor building. Compared with the prior art in which large-sized components are split into multiple units and the multiple units are transported through the equipment transportation channel to the reactor building and then assembled, the technical solution of the present application can improve the transportation and installation efficiency of the first set of components, and thus improve the installation efficiency of the fast reactor equipment.

[0012] The second set of components is small in size and can be transported to the interior of the reactor building through the equipment transportation channel. The first set of components and the second set of components are respectively transported to the interior of the reactor building through the conveying channel at the top of the reactor building and the equipment transportation channel simultaneously, which improves the transportation efficiency. And during the transportation of the first set of components and the second set of components, the first set of components and the second set of components that have been arranged in the reactor building are installed, further improving the installation efficiency of the fast reactor equipment, shortening the construction time, and reducing the cost.

[0013] In an alternative embodiment, before transporting the first set of components from the conveying channel at the top of the reactor building to the interior of the reactor building, and before transporting the second set of components from the equipment transportation channel of the reactor building to the interior of the reactor building, the following steps are further included:

[0014] Set up a temporary storage area and an installation area in the reactor building.

[0015] In an alternative embodiment, transporting the first set of components from the conveying channel at the top of the reactor building to the interior of the reactor building includes:

[0016] Set up a first hoisting mechanism outside the reactor building;

[0017] Use the first hoisting mechanism to hoist the first set of components with a relatively early installation sequence to the installation area;

[0018] Use the first hoisting mechanism to hoist the first set of components with a relatively late installation sequence to the temporary storage area.

[0019] In an alternative embodiment, transporting the second set of components from the equipment transportation channel of the reactor building to the interior of the reactor building includes:

[0020] Transport the second set of components with a relatively early installation sequence to the installation area;

[0021] Transport the second set of components with a relatively late installation sequence to the temporary storage area.

[0022] In an alternative embodiment, the assembling of the first set of components and the second set of components includes:

[0023] Set up a second hoisting mechanism at the top of the reactor building;

[0024] Use the second hoisting mechanism to install the first set of components and the second set of components located in the installation area;

[0025] Among them, the first set of components includes in-core support components, in-core components, top fixed shielding, top protective cover, and at least one cylinder section;

[0026] Among them, the second set of components includes a plug and a main equipment;

[0027] Among them, the second hoisting mechanism is provided with two beam arms, and a first gap is provided between the two beam arms.

[0028] In an alternative embodiment, the transporting of the first set of components from the conveying channel at the top of the reactor building to the inside of the reactor building further includes:

[0029] Use the first hoisting mechanism to hoist the top fixed shielding into the reactor building;

[0030] Among them, the diameter of the top fixed shielding is smaller than the first gap;

[0031] The assembling of the first set of components and the second set of components further includes: using the second hoisting mechanism to install the top fixed shielding.

[0032] In an alternative embodiment, after using the first hoisting mechanism to hoist the top fixed shielding into the reactor building, the following steps are further included:

[0033] Use the first hoisting mechanism to disassemble the second hoisting mechanism;

[0034] Use the first hoisting mechanism to install the ring crane on the top of the reactor building;

[0035] Use the first hoisting machine to install the dome on the top of the reactor building.

[0036] In an alternative embodiment, before using the first hoisting machine to install the dome on the top of the reactor building, the following steps are further included:

[0037] Split the top shield of the reactor into multiple protective parts;

[0038] Use the first lifting mechanism to lift multiple protective parts to the temporary storage area.

[0039] In an alternative embodiment, transporting the second group of components with a later installation sequence to the temporary storage area includes:

[0040] Transport the plug parts and the main equipment to the temporary storage area;

[0041] The assembly of the first group of components and the second group of components further includes: assembling the plug parts to obtain a plug;

[0042] Use the overhead crane to install the plug;

[0043] Use the overhead crane to install the main equipment on the in-reactor support components;

[0044] Assemble multiple protective parts to obtain the top shield of the reactor;

[0045] Use the overhead crane to install the top shield of the reactor.

[0046] In an alternative embodiment, after using the overhead crane to install the top shield of the reactor, transporting the second group of components with a later installation sequence to the temporary storage area further includes:

[0047] Transport the secondary sodium pump to the temporary storage area;

[0048] The assembly of the first group of components and the second group of components further includes:

[0049] Use the overhead crane to install the secondary sodium pump. Description of the Drawings

[0050] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0051] Figure 1 It is a flowchart of an installation method for a fast reactor equipment according to an embodiment of the present application;

[0052] Figure 2 It is a schematic diagram of the first lifting mechanism, the second lifting mechanism, and the structure of the reactor building in an installation method for a fast reactor equipment according to an embodiment of the present application;

[0053] Figure 3 Schematic diagram of the mechanism for installing the overhead crane at the top of the reactor building in the installation method of a fast reactor device according to an embodiment of the present application;

[0054] Figure 4 Schematic diagram of the mechanism for installing the second hoisting mechanism at the top of the reactor building in the installation method of a fast reactor device according to an embodiment of the present application;

[0055] Figure 5 Distribution diagram of the installation area, temporary storage area, first temporary assembly area, second temporary assembly area, and main equipment transportation channel in the reactor building in the installation method of a fast reactor device according to an embodiment of the present application.

[0056] Explanation of reference numerals:

[0057] 1. Reactor building; 2. First hoisting mechanism; 3. Second hoisting mechanism; 4. Overhead crane; 5. Fast reactor device; 6. Fixed shield at the reactor top; 7. Installation area; 8. Temporary storage area; 9. First temporary assembly area; 10. Second temporary assembly area; 11. Equipment transportation channel; 12. First gap. Detailed implementation manners

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0059] Under the "dual carbon" goal, the long-term development of nuclear energy poses new requirements for issues such as the supply guarantee of uranium resources and the safe management of spent fuel. Accelerating the development of fast reactors is the only way to address new energy challenges, an important step in the three-step strategy of "thermal reactor - fast reactor - fusion reactor" for the development of nuclear energy in China, and the development direction of advanced nuclear energy systems.

[0060] The million-kilowatt fast reactor project is a key step for China's fast reactor technology to move towards commercial application. While the power of the million-kilowatt fast reactor is increased, the scale and complexity of its equipment also increase accordingly. Considering reducing the floor area and construction cost, etc., the nuclear island of the million-kilowatt fast reactor adopts a compact layout plan, and the reactor building is changed from square to circular, making the reactor building more compact. However, the compact layout makes the temporary storage and installation space for equipment in the reactor building hall relatively narrow, posing more stringent requirements for the equipment installation method.

[0061] Compared with a pressurized water reactor, the pressure vessel of a pressurized water reactor is introduced through the equipment transportation passage in the reactor building after being manufactured by the manufacturer. For a fast reactor, some components of the reactor vessel are relatively large in size, such as in-vessel support components, fixed shields, plugs, and reactor vessel heads. These items cannot be introduced into the reactor building after installation and need to be installed within the reactor building.

[0062] In related technologies, when installing the reactor vessel in a fast reactor, the first group of components with relatively small sizes in the reactor vessel, such as main pumps, intermediate heat exchangers, etc., are transported through the equipment transportation passage to the reactor building for installation. The second group of components with relatively large sizes in the reactor vessel, such as the fixed shield on the reactor vessel head, plugs, and reactor vessel heads, cannot be transported through the equipment transportation passage and their parts need to be transported from the equipment passage to the reactor building for on-site assembly. Due to the reduced volume of the reactor building, it is inconvenient to perform assembly within the reactor building, which also affects the transportation and installation of other components as well as the main construction of the reactor building, resulting in low installation efficiency, long construction time, and high cost of the reactor vessel. Therefore, the present application provides an installation method for fast reactor equipment to solve or improve the problems of low installation efficiency, long construction time, and high cost of the reactor vessel.

[0063] The following will describe the embodiments of the present application in conjunction with Figures 1 to 5 ,

[0064] According to an embodiment of the present application, an installation method for fast reactor equipment is provided. The fast reactor equipment 5 includes a first group of components and a second group of components. As Figure 1 shown, the installation method includes:

[0065] Step S101: Transport the first group of components from the transportation passage at the top of the reactor building 1 to the inside of the reactor building 1;

[0066] Step S102: Transport the second group of components from the equipment transportation passage 11 of the reactor building 1 to the inside of the reactor building 1;

[0067] Step S103: Assemble the first group of components and the second group of components to complete the installation of the fast reactor equipment 5.

[0068] In this embodiment, the first group of components are large in size and are transported from the transportation passage at the top of the reactor building 1 to the inside of the reactor building 1. Compared with the related technology of splitting large-sized components into multiple units and transporting the multiple units through the equipment transportation passage 11 to the reactor building 1 for assembly, the technical solution of the present application can improve the transportation and installation efficiency of the first group of components, and thus improve the installation efficiency of the fast reactor equipment 5.

[0069] The second group of components are small in size and can be transported to the reactor building 1 through the equipment transportation channel 11. The first group of components and the second group of components are respectively transported to the reactor building 1 through the transportation channel at the top of the reactor building 1 and the equipment transportation channel 11 simultaneously, improving the transportation efficiency. And during the transportation of the first group of components and the second group of components, the first group of components and the second group of components that have been arranged in the reactor building 1 are installed, further improving the installation efficiency of the fast reactor equipment 5, shortening the construction time, and reducing the high cost.

[0070] In some embodiments, a transportation channel is provided at the top of the reactor building 1 during its construction, and an equipment transportation channel 11 is provided at its side.

[0071] In some embodiments, steps S101 and S102 are not in a specific order.

[0072] Specifically, the first group of components are large in size and are transported through the transportation channel at the top of the reactor building 1; the second group of components are small in size and are transported through the equipment transportation channel 11 of the reactor building 1.

[0073] In one embodiment, as Figure 5 shown, before transporting the first group of components from the transportation channel at the top of the reactor building 1 to the inside of the reactor building 1, and before transporting the second group of components from the equipment transportation channel 11 of the reactor building 1 to the inside of the reactor building 1, the following steps are further included:

[0074] A temporary storage area 8 and an installation area 7 are set up in the reactor building 1.

[0075] In this embodiment, as Figure 5 shown, the first group of components and the second group of components are continuously transported to the installation area 7 and the temporary storage area 8, and the first group of components and the second group of components in the installation area 7 are installed. The installation and transportation of the first group of components and the second group of components are carried out synchronously, improving the installation efficiency; setting up the temporary storage area 8 can buffer the first group of components and the second group of components transported into the reactor building 1 and prevent them from affecting the first group of components and the second group of components being installed.

[0076] In one embodiment, as Figure 2 shown, transporting the first group of components from the transportation channel at the top of the reactor building 1 to the inside of the reactor building 1 includes:

[0077] A first hoisting mechanism 2 is set up outside the reactor building 1;

[0078] Using the first hoisting mechanism 2 to hoist the first group of components with a higher installation order to the installation area 7;

[0079] Using the first hoisting mechanism 2 to hoist the first group of components with a lower installation order to the temporary storage area 8.

[0080] In this embodiment, as Figure 2 and Figure 5 shown, the first hoisting mechanism 2 hoists the first group of components from the conveying channel at the top of the reactor building 1 into the reactor building 1, hoists the first group of components with an earlier installation sequence to the installation area 7 for easy installation in the installation area 7, and hoists the first group of components with a later installation sequence to the temporary storage area 8 to provide a buffer area for the conveyance of the first group of components, enabling the first hoisting mechanism 2 to continuously transport the first group of components. At the same time, it does not affect the installation of the first group of components in the installation area 7.

[0081] In one embodiment, conveying the second group of components from the equipment transportation channel 11 of the reactor building 1 into the reactor building 1 includes:

[0082] Transporting the second group of components with an earlier installation sequence to the installation area 7;

[0083] Transporting the second group of components with a later installation sequence to the temporary storage area 8.

[0084] In this embodiment, transporting the second group of components from the equipment transportation channel 11 of the reactor building 1 into the reactor building 1, hoisting the second group of components with an earlier installation sequence to the installation area 7 for easy installation in the installation area 7, and hoisting the second group of components with a later installation sequence to the temporary storage area 8 to provide a buffer area for the conveyance of the second group of components, enabling continuous conveyance of the second group of components. At the same time, it does not affect the installation of the second group of components in the installation area 7.

[0085] In some embodiments, the second group of components is transported by a transport vehicle.

[0086] In one embodiment, as Figure 4 shown, assembling the first group of components and the second group of components includes:

[0087] Setting a second hoisting mechanism 3 at the top of the reactor building 1;

[0088] Using the second hoisting mechanism 3 to install the first group of components and the second group of components located in the installation area 7;

[0089] Among them, the first group of components includes in-core support components, in-core components, a reactor top fixed shield 6, a reactor top protective cover, and at least one cylinder section;

[0090] Among them, the second group of components includes a stopcock and main equipment;

[0091] Among them, as Figure 4 shown, the second hoisting mechanism 3 is provided with two beam arms, and a first gap 12 is provided between the two beam arms.

[0092] In this embodiment, the second hoisting mechanism 3 cooperates with the staff to assemble the first group of components and the second group of components in the reactor building 1 .

[0093] In some embodiments, a plurality of cylinder segments are installed in the height direction to form a stack container body, in-stack support components and in-stack components are installed in the stack container body, and a stack top fixed shield 6 is installed on the stack container body.

[0094] In some embodiments, the plug is installed after the stack top fixed shield 6 is installed.

[0095] In some embodiments, after the installation of the barrel segments, the in-pile support components, the in-pile components, the pile top fixed shield 6, the pile top protective cover, the plug and other components are completed, the pile top protective cover is installed on the pile container body.

[0096] In some embodiments, the in-pile support components include an in-pile pump support, an intermediate heat exchanger support, an independent heat exchanger support and a radial heat shield, and the maximum lifting weight of the second hoisting mechanism 3 is designed according to the heaviest of the above items.

[0097] In some embodiments, the stopcock includes a medium stopcock and a large stopcock.

[0098] In some embodiments, the main equipment includes a main pump, an intermediate heat exchanger, an independent heat exchanger, etc., which need to be introduced into the reactor building 1 from the main equipment transportation channel 11 and installed above the stack container using special tools for the main equipment.

[0099] In some embodiments, the reactor building 1 is also provided with a preheating area. The special tools for the main equipment are mainly used for preheating, cleaning and installation of the main equipment. The special tools for the main equipment can be stored in the temporary storage area 8, and the temporary storage area 8 can be used at a different time from the stopcock to save space.

[0100] In some embodiments, assembling the first set of components and the second set of components further comprises:

[0101] The first set of components located in the temporary storage area 8 is transported to the installation area 7 by using the second lifting mechanism 3;

[0102] And / or, the second group of components located in the temporary storage area 8 is transported to the installation area 7 by using the second lifting mechanism 3 .

[0103] In some embodiments, after the second hoisting mechanism 3 is put into operation, the installation of the first set of components and the second set of components in the reactor building 1 is carried out simultaneously with the civil construction of the reactor building 1 .

[0104] In one embodiment, Figure 4 As shown, the first group of components is transported from the transport channel at the top of the reactor building 1 to the inside of the reactor building 1, and further includes:

[0105] Use the first hoisting mechanism 2 to hoist the top fixed shield 6 into the reactor building 1;

[0106] Among them, the diameter of the top fixed shield 6 is smaller than the first gap 12;

[0107] Assembling the first group of components and the second group of components further includes: installing the top fixed shield 6 using the second hoisting mechanism 3.

[0108] In this embodiment, the first hoisting mechanism 2 hoists the top fixed shield 6 through the first gap 12 into the reactor building 1, and then installs the top fixed shield 6 through the second hoisting mechanism 3.

[0109] In some embodiments, such as Figure 4 shown, the second hoisting mechanism 3 is a gantry crane. The gantry crane is provided with two beam arms. The gap between the two beam arms is the first gap 12, and the distance between the two beam arms is greater than the diameter of the top fixed shield 6.

[0110] In some embodiments, the in-core components include a radial thermal shield, a cone top cover, a grid plate header, and a protection container. After the in-core components are installed by the second hoisting mechanism 3, the first hoisting mechanism 2 introduces the top fixed shield 6 from the first gap 12 between the two beam arms of the gantry crane into the reactor building 1.

[0111] In one embodiment, as Figure 3 described, after using the first hoisting mechanism 2 to hoist the top fixed shield 6 into the reactor building 1, the following steps are further included:

[0112] Use the first hoisting mechanism 2 to disassemble the second hoisting mechanism 3;

[0113] Use the first hoisting mechanism 2 to install the ring crane 4 on the top of the reactor building 1;

[0114] Use the first hoisting machine to install the dome on the top of the reactor building 1.

[0115] In this embodiment, after hoisting the top fixed shield 6 into the reactor building 1, the first hoisting mechanism 2 disassembles the second hoisting mechanism 3, and the first hoisting mechanism 2 hoists the ring crane 4 to the top of the reactor building 1. The ring crane 4 has stronger flexibility, and uses the ring crane 4 to install the first group of components and the second group of components in the reactor building 1, with higher efficiency.

[0116] After installing the ring crane 4 on the top of the reactor building 1, the first hoisting mechanism 2 installs the dome on the top of the reactor building 1, avoiding the influence of the external weather on the construction inside the reactor building 1 and on the construction of the reactor building 1 itself.

[0117] In some embodiments, such as Figure 3 described, the reactor building 1 adopts a circular layout form, and the gantry crane 4 is installed on the top of the reactor building 1, which will inevitably block the center of the reactor building 1. Since the diameter of the fixed shield 6 at the reactor top is larger than the distance between the two beams of the gantry crane 4, and the fixed shield 6 at the reactor top is relatively heavy, it can only be introduced into the reactor building 1 by the first hoisting mechanism 2. Therefore, the gantry crane 4 will inevitably interfere with the introduction of the fixed shield 6 at the reactor top. However, in order to achieve parallel construction and shorten the construction period, a gantry crane is set up to first replace the function of the gantry crane 4 to meet the hoisting requirements of the first group of components and the civil construction of the reactor building 1 in the early stage. Relying solely on the first hoisting mechanism 2 cannot meet the above requirements.

[0118] In one embodiment, before installing the dome on the top of the reactor building 1 by using the first crane, the steps further include:

[0119] Split the reactor top protective cover into multiple protective parts;

[0120] Use the first hoisting mechanism 2 to hoist the multiple protective parts to the temporary storage area 8.

[0121] In this embodiment, the diameter of the reactor top protective cover is relatively large. If it is introduced from the main equipment transportation passage 11, a large area is required for the main equipment transportation passage 11 and the gantry. This is not conducive to the construction of the compact reactor building 1. Therefore, in order to realize the construction of the compact reactor building 1, reduce investment and improve economy, the reactor top protective cover is split into multiple protective parts. Before installing the dome, use the first hoisting mechanism 2 to introduce the multiple protective parts into the reactor building 1 and temporarily store them in the temporary storage area 8. After the installation of components such as cylinder sections, in-core support components, in-core components, the fixed shield 6 at the reactor top, the reactor top protective cover, and the plug is completed, the multiple protective parts are assembled and then installed on the reactor vessel body by the gantry crane 4.

[0122] In one embodiment, such as Figure 5 shown, transport the second group of components with a later installation sequence to the temporary storage area 8, including:

[0123] Transport the plug parts and the main equipment to the temporary storage area 8;

[0124] The assembly of the first group of components and the second group of components further includes: assembling the plug parts to obtain a plug;

[0125] Install the plug by using the gantry crane 4;

[0126] Install the main equipment on the in-core support components by using the gantry crane 4;

[0127] Assemble the multiple protective parts to obtain the reactor top protective cover;

[0128] Install the top shield using the ring crane 4.

[0129] In this embodiment, after the top fixed shield 6 is installed, the installation of the plug cock is required. Since the plug cock is large in size, if the first hoisting mechanism 2 is used to lift the plug cock as a whole, there is a risk of deformation. Therefore, the plug cock parts need to be transported from the main equipment transportation channel 11 to the reactor building 1, assembled in the reactor building 1, and then positioned by the ring crane 4.

[0130] In some embodiments, the plug cock includes a large plug cock and a medium plug cock. The temporary storage area 8 is provided with a first temporary assembly area 9 and a second temporary assembly area 10. The large plug cock parts are assembled in the first temporary assembly area 9, and the medium plug cock parts are assembled in the second temporary assembly area 10. The ring crane 4 is used to position and install the large plug cock and the medium plug cock.

[0131] In one embodiment, after installing the top shield using the ring crane 4, the second group of components with a later installation sequence are transported to the temporary storage area 8, and it further includes:

[0132] Transport the secondary sodium pump to the temporary storage area 8;

[0133] Assemble the first group of components and the second group of components, and it further includes:

[0134] Install the secondary sodium pump using the ring crane 4.

[0135] In this embodiment, the secondary sodium pump is introduced into the reactor building 1 from the main equipment transportation channel 11. Since the dome installation is completed, at this time, the main equipment transportation channel 11 undertakes the transportation of all items in the reactor building 1. If the flipping of the secondary sodium pump is carried out on the main equipment transportation channel 11, the flipping device needs to be fixed on the embedded parts on the floor slab. Each time the secondary sodium pump is flipped, disassembly and assembly are required, which is time-consuming and laborious, and will affect the transportation of other items, delaying the construction progress and thus affecting the project duration.

[0136] To avoid occupying the main equipment transportation channel 11 for too long, use the ring crane 4 to place the secondary sodium pump in the temporary storage area 8. After the top shield is hoisted and positioned, install the flipping device in the temporary storage area 8, flip and position the secondary sodium pump, and then install it through the ring crane 4.

[0137] In some embodiments, four secondary sodium pumps are provided, and four temporary storage areas 8 are provided. The four secondary sodium pumps are correspondingly arranged in the four temporary storage areas 8.

[0138] The following takes an embodiment to comprehensively elaborate on Figures 1 to 5 all the above solutions.

[0139] The installation of the first group of components and the second group of components is carried out synchronously with the civil construction of the reactor building 1.

[0140] After the delivery of the reactor pit slab of the reactor building 1, the steel cladding and the sodium leakage suppression plate are installed. After the installation is completed, the bottom head is hoisted into place by the first hoisting mechanism 2, which is a component in the first group of components of the bottom head.

[0141] The reactor building 1 adopts a circular layout form. The gantry crane 4 is installed on the top of the reactor building 1, which will inevitably block the center of the reactor building 1. Since the diameter of the fixed shield 6 on the reactor top is larger than the distance between the double beams of the gantry crane 4 and the weight of the fixed shield 6 on the reactor top is relatively large, it can only be introduced into the reactor building 1 by the first hoisting mechanism 2. Therefore, the gantry crane 4 will inevitably interfere with the introduction of the fixed shield 6 on the reactor top. However, in order to achieve parallel construction and shorten the construction period, a gantry crane is set up to temporarily replace the function of the gantry crane 4 to meet the hoisting requirements of the first group of components and the civil construction of the reactor building 1 in the early stage. Relying solely on the first hoisting mechanism 2 cannot meet the above requirements.

[0142] The second hoisting mechanism 3 is a gantry crane. The gantry crane is provided with two boom arms. The gap between the two boom arms is the first gap 12, and the distance between the two boom arms is larger than the diameter of the fixed shield 6 on the reactor top.

[0143] The in-core components include the radial thermal shield, the cone top cover, the grid plate header, and the protection vessel. After the in-core components are installed by the second hoisting mechanism 3, the fixed shield 6 on the reactor top is introduced into the reactor building 1 through the first gap 12 between the two boom arms of the gantry crane by the first hoisting mechanism 2.

[0144] After the fixed shield 6 on the reactor top is introduced into the reactor building 1, the gantry crane 4 is installed.

[0145] After the fixed shield 6 on the reactor top is installed, the installation of the plug cock needs to be carried out. Since the size of the plug cock is relatively large, there is a risk of deformation if the first hoisting mechanism 2 is used to hoist the plug cock as a whole. Therefore, the plug cock parts need to be transported from the main equipment transportation channel 11 to the inside of the reactor building 1, assembled inside the reactor building 1, and then positioned by the gantry crane 4.

[0146] The plug cock includes a large plug cock and a medium plug cock. The temporary storage area 8 is provided with a first temporary assembly area 9 and a second temporary assembly area 10. The large plug cock parts are assembled in the first temporary assembly area 9, and the medium plug cock parts are assembled in the second temporary assembly area 10. The gantry crane 4 is used to position and install the large plug cock and the medium plug cock.

[0147] Finally, install the secondary loop sodium pump. To avoid occupying the main equipment transportation channel 11 for too long, use the overhead crane 4 to place the secondary loop sodium pump in the temporary storage area 8. After the top shield of the reactor is hoisted in place, install a turning device in the temporary storage area 8 to turn the secondary loop sodium pump into position, and then install it through the overhead crane 4.

[0148] Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations fall within the scope defined by the appended claims of the present application.

Claims

1. A method for installing a fast reactor device, characterized in that: The fast reactor device (5) comprises a first group of components and a second group of components, and the installation method comprises: transporting the first group of components from a transport channel at the top of the reactor building (1) to the interior of the reactor building (1); transporting the second group of components from the equipment transport passage (11) of the reactor building (1) to the interior of the reactor building (1); The first group of components and the second group of components are assembled to complete the installation of the fast reactor device (5).

2. The method for installing a fast reactor device according to claim 1, characterized in that: Before the first set of components is transported from the transport channel at the top of the reactor building (1) to the inside of the reactor building (1), and before the second set of components is transported from the equipment transport channel (11) of the reactor building (1) to the inside of the reactor building (1), the steps further include: A temporary storage area (8) and an installation area (7) are provided in the reactor building (1).

3. The method for installing a fast reactor device according to claim 2, characterized in that: The method of transporting the first group of components from the transport channel at the top of the reactor building (1) to the interior of the reactor building (1) comprises: A first lifting mechanism (2) is arranged outside the reactor building (1); Using the first lifting mechanism (2) to lift the first group of components that are installed earlier in the order of installation to the installation area (7); The first lifting mechanism (2) is used to lift the first group of components that are installed later in the order of installation to the temporary storage area (8).

4. The method for installing a fast reactor device according to claim 3, characterized in that: The method of transporting the second group of components from the equipment transport passage (11) of the reactor building (1) to the interior of the reactor building (1) comprises: transporting the second group of components that are at the front of the installation sequence to the installation area (7); The second group of components which are installed later in order are transported to the temporary storage area (8).

5. The method for installing a fast reactor device according to claim 4, characterized in that: The assembling of the first group of components and the second group of components comprises: A second lifting mechanism (3) is arranged on the top of the reactor building (1); Using the second lifting mechanism (3) to install the first group of components and the second group of components located in the installation area (7); The first group of components includes an in-pile support component, an in-pile component, a pile top fixed shield (6), a pile top protective cover and at least one barrel segment; Wherein, the second group of components includes a cock and a main device; Wherein, the second lifting mechanism (3) is provided with two beam arms, and a first gap (12) is provided between the two beam arms.

6. The method for installing a fast reactor device according to claim 5, characterized in that: The method of transporting the first group of components from the transport channel at the top of the reactor building (1) to the interior of the reactor building (1) further comprises: Using the first hoisting mechanism (2) to hoist the reactor top fixed shield (6) into the interior of the reactor building (1); Wherein, the diameter of the stack top fixed shield (6) is smaller than the first gap (12); The assembling of the first group of components and the second group of components further comprises: installing the stack top fixed shield (6) using the second lifting mechanism (3).

7. The method for installing a fast reactor device according to claim 6, characterized in that: After the first hoisting mechanism (2) is used to hoist the top fixed shield (6) into the interior of the reactor building (1), the method further comprises the following steps: Using the first lifting mechanism (2) to dismantle the second lifting mechanism (3); Using the first lifting mechanism (2) to install the ring crane (4) on the top of the reactor building (1); The dome is installed on the top of the reactor building (1) using the first hoisting machine.

8. The method for installing a fast reactor device according to claim 7, characterized in that: Before the dome is installed on the top of the reactor building (1) by using the first hoisting machine, the method further comprises the following steps: Split the top protective cover into multiple protective parts; The first hoisting mechanism (2) is used to hoist the plurality of protection parts to the temporary storage area (8).

9. The method for installing a fast reactor device according to claim 8, characterized in that: The step of transporting the second group of components which are installed later in order to the temporary storage area (8) comprises: Transporting the tap parts and the main equipment to the temporary storage area (8); The assembling of the first group of components and the second group of components further comprises: assembling the cock parts to obtain a cock; Using the ring hanger (4) to install the cock; Using the ring crane (4) to install the main equipment on the in-pile support component; Assembling a plurality of the protection parts to obtain a stack top protection cover; The pile top protective cover is installed using a ring crane (4).

10. The method for installing a fast reactor device according to claim 9, characterized in that: After the pile top protective cover is installed by the ring crane (4), the second group of components which are installed later in sequence are transported to the temporary storage area (8), and further comprising: The secondary circuit sodium pump is transported to the temporary storage area (8); The assembling of the first group of components and the second group of components further comprises: The secondary circuit sodium pump is installed using the ring hanger (4).

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