Penetrations and water box modular construction method for nuclear reactors

Abstract

The present disclosure relates to the technical field of nuclear reactor construction, in particular to a nuclear reactor penetration and water tank modular construction method, which comprises the following steps: forming module units by modular construction of the penetration and the water tank in a workshop according to design drawings; transporting a plurality of module units to a construction site; determining a first installation position of the module units and a second installation position of a support structure according to the design drawings after civil construction detection of the construction site is qualified; transporting the plurality of module units to the first installation position, and installing the support structure according to the second installation position, and installing each module unit on the support structure at the corresponding position. The civil construction operation and the modular construction operation can be constructed in parallel, the module units can be directly transported for installation after the civil structure has installation conditions, the modular construction and installation process will not be disturbed by various construction factors, the overall construction period is shortened, the penetration and water tank assembly quality is improved, and the construction period loss and labor cost are reduced.

Description

Technical Field

[0001] This disclosure relates to the technical field of nuclear reactor construction, and more particularly to a modular construction method for nuclear reactor penetrations and water tanks. Background Technology

[0002] In existing technology, the penetrator and water tank are located within the reactor building. The water tank serves as the intake port for the safety injection system's water intake pipe. Pool water is filtered by a filter installed above the water tank before entering the tank and then passing through the penetrator into the safety injection system loop. The penetrator penetrates the containment structure and connects to the safety building. Furthermore, the penetrator's pipe diameter is large, its length is long, and its weight is heavy, making installation and construction operations difficult to control. Traditional installation methods typically involve on-site installation after civil engineering handover. This process is subject to numerous construction restrictions, is challenging, and results in problems such as long construction periods, low efficiency, high safety risks, difficulty in quality control, significant project timelines, and high labor costs.

[0003] Therefore, it is necessary to propose a modular construction method for the penetrations and water tanks of nuclear reactors to at least partially solve the problems existing in the prior art. Summary of the Invention

[0004] This disclosure aims to address at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, this disclosure proposes a modular construction method for the penetrations and water tanks of a nuclear reactor.

[0006] In view of this, a modular construction method for the penetrations and water tanks of a nuclear reactor is proposed according to embodiments of this disclosure, including: According to the design drawings, the through-piece and the water tank are constructed in a modular manner in the workshop to form modular units; Transport multiple of the aforementioned module units to the aforementioned construction site; After the civil engineering inspection at the construction site is deemed qualified, the first installation position of the above-mentioned module unit and the second installation position of the supporting structure are determined according to the above-mentioned design drawings. Multiple of the aforementioned module units are transported to the aforementioned first installation position, and the aforementioned support structure is installed according to the aforementioned second installation position, with each of the aforementioned module units installed in the aforementioned support structure at the corresponding position.

[0007] In one feasible implementation, the modular construction method for the penetrations and water tanks of the aforementioned nuclear reactor further includes: After the aforementioned penetrating components, water tanks, and installation accessories are transported to the aforementioned workshop, they are inspected and accepted. The environment of the aforementioned workshop and the modular construction equipment are also tested to meet the requirements of modular construction.

[0008] In one feasible implementation, the steps of modularly constructing the penetrating component and water tank in the workshop according to the design drawings to form modular units include: The above-mentioned workshop was divided into construction areas, which were then isolated and subjected to pollution prevention treatment. According to the above design drawings, the first layout operation is carried out in the above construction area, wherein the first layout operation is to lay out the outline of the above water tank and the axis of the above through part; The water tank and the through-piece are placed according to the results of the first layout operation. After checking and verifying that the slope of the through-piece meets the design requirements, the through-piece and the water tank are assembled and welded to form the module unit.

[0009] In one feasible implementation, the step of transporting multiple of the above-mentioned module units to the above-mentioned construction site includes: Based on the hoisting simulation results, the overall center of gravity and hoisting point positions of the above-mentioned module units were determined. The slings are attached to the aforementioned lifting points, and the lifting equipment uses the slings to lift the module unit into the flatbed trailer. The flatbed trailer then transports the module unit to the temporary storage area at the construction site.

[0010] In one feasible implementation, two lifting points are provided, which are respectively located on both sides of the center of gravity and are equidistant from the center of gravity. The distance between each lifting point and the center of gravity is 4m to 5m.

[0011] In one feasible implementation, after the above-mentioned civil engineering inspection at the construction site has passed, the steps of determining the first installation position of the module unit and the second installation position of the supporting structure according to the above-mentioned design drawings include: The flatness and height of the civil engineering structures at the above construction site were inspected. After confirming that the flatness and height of the above-mentioned civil works meet the design requirements, a second layout operation is carried out at the above-mentioned construction site according to the design orientation angle corresponding to each of the above-mentioned module units in the above-mentioned design drawings. The second layout operation is to lay out the direction of the above-mentioned through-piece. Based on the orientation of each of the aforementioned through-holes, the second installation position of the aforementioned support structure corresponding to each of the aforementioned through-holes is determined.

[0012] In one feasible implementation, the step of determining the second installation position of the support structure corresponding to each of the aforementioned through-holes, based on the orientation of each through-hole, includes: The aforementioned support structure includes brackets. Based on the number and spacing of the brackets required by the aforementioned design drawings, a plurality of second installation positions of the brackets are determined along the direction of the aforementioned through-piece. Based on the slope design requirements of the aforementioned through-pieces, the height position of each of the aforementioned supports is calibrated.

[0013] In one feasible implementation, the steps of transporting the plurality of the aforementioned module units to the aforementioned first installation position and installing the aforementioned support structure according to the aforementioned second installation position, and installing each of the aforementioned module units in the aforementioned support structure at the corresponding position, include: Multiple of the aforementioned module units were lifted from the aforementioned temporary storage area and passed through the containment structure from the reactor building at the aforementioned construction site to the area where the aforementioned first installation location was located. Adjust the position of the above module unit so that the above module unit corresponds to the above first installation position; Install the bracket according to the marked second installation position and the marked height position; Each of the above-mentioned module units is installed on one of the above-mentioned brackets in the corresponding orientation.

[0014] In one feasible implementation, the step of adjusting the position of the module unit to correspond to the first installation position includes: The module unit is supported by temporary support components, and the position of the module unit is initially adjusted. The module unit is supported by a gantry and a mobile flatbed vehicle. The precision of the through-piece of the module unit is adjusted, and the position of the module unit is detected so that the module unit corresponds to the first installation position.

[0015] In one feasible implementation, the modular construction method for the penetrations and water tanks of the aforementioned nuclear reactor further includes: After all the above-mentioned module units are installed on the corresponding support structure, all the above-mentioned module units are wrapped and protected until concrete is poured.

[0016] Compared to existing technologies, this disclosure offers at least the following advantages: The modular construction method for the nuclear reactor penetrations and water tanks provided in this disclosure involves modularly constructing the penetrations and water tanks in a workshop according to design drawings, forming modular units; transporting multiple modular units to the construction site; determining the first installation position of the modular units and the second installation position of the supporting structure according to the design drawings after the civil engineering inspection at the construction site is qualified; and installing each modular unit in the corresponding support structure by transporting multiple modular units to the first installation position and installing the supporting structure according to the second installation position. This arrangement allows for parallel construction of civil engineering and modular construction. Once the civil engineering structure is ready for installation, the modular units formed by the penetrations and water tanks can be directly transported for installation, significantly reducing the construction cycle. Furthermore, the modular construction and installation process are not affected by various construction factors, shortening the overall construction cycle, improving construction efficiency, reducing construction risks, improving the assembly quality of the penetrations and water tanks, and reducing project time losses and labor costs. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of exemplary embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic flowchart illustrating a modular construction method for a nuclear reactor penetration and water tank according to an embodiment of this disclosure; Figure 2 A schematic structural diagram of a module unit provided in one embodiment of this disclosure; Figure 3 A schematic diagram showing the center of gravity, lifting point distribution, and support distribution of a module unit according to an embodiment of this disclosure; Figure 4 This is a schematic diagram of the installation of a module unit according to one embodiment of the present disclosure; Figure 5 This is a schematic assembly diagram of a bracket and a through member according to one embodiment of the present disclosure.

[0018] in, Figures 2 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows: 200 Module Unit, 210 Penetrating Component, 220 Water Tank, 230 Bracket, 240 Containment, A Center of Gravity, B Lifting Point. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are merely for describing exemplary embodiments of the invention. However, the invention can be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0020] like Figure 1 As shown, according to an embodiment of this disclosure, a modular construction method for the penetration member 210 and water tank 220 of a nuclear reactor is proposed, including: Step S110: According to the design drawings, the through-piece 210 and the water tank 220 are modularly constructed in the workshop to form modular unit 200; Step S110 includes steps S111 to S113.

[0021] Among them, step S111: the above-mentioned workshop is divided into construction areas, the above-mentioned construction areas are isolated, and pollution prevention treatment is carried out; Understandably, construction areas can be divided within the workshop to allow for modular construction within these areas. Protective measures can be implemented to isolate these construction areas to prevent contamination of the pipes penetrating the 210 and improve reliability.

[0022] It should be noted that the penetrating component 210 is the IRWST (In-Containment Refueling Water Storage Tank) penetrating component, and the water tank 220 is the suction port of the RIS (Safety Injection System) water intake pipe.

[0023] For example, the length of the construction area can be selected as 22.5m and the width can be selected as 10m to meet the assembly space requirements of the penetrating component 210 and the water tank 220.

[0024] In some examples, after the aforementioned penetrating component 210, the aforementioned water tank 220, and the installation accessories are transported to the aforementioned workshop, they are inspected and accepted, and the environment of the aforementioned workshop and the modular construction equipment are tested to meet the requirements of modular construction.

[0025] Understandably, before proceeding to step S111, the penetrating component 210, water tank 220, and installation accessories can all be transported to the workshop for inspection and acceptance. After the inspection and acceptance are passed, the workshop environment and equipment related to modular construction are tested. Once the workshop environment and equipment related to modular construction meet the requirements of modular construction, subsequent modular construction operations can be carried out to ensure the stability of modular construction operations.

[0026] Step S112: According to the above design drawings, carry out the first layout operation in the above construction area, wherein the first layout operation is to lay out the outline of the water tank 220 and the axis of the through member 210. Understandably, the first layout operation can be carried out in the construction area according to the assembly requirements of the water tank 220 and the through-piece 210 in the design drawings. The outline of the water tank 220 that forms the modular unit 200 and the axis of the through-piece 210 are marked in the construction area through the first layout operation, which makes it easier to align the position of the water tank 220 and the through-piece 210 and improves the efficiency and accuracy of subsequent construction.

[0027] Step S113: Place the water tank 220 and the through-piece 210 according to the results of the first layout operation. After checking and verifying that the slope of the through-piece 210 meets the design requirements, perform assembly welding on the through-piece 210 and the water tank 220 to form the module unit 200.

[0028] Figure 2 This is an assembly diagram of the penetrating component 210 and the water tank 220. After placing the water tank 220 according to its outline in the first layout operation, and placing the penetrating component 210 according to its axis in the first layout operation, the angle of the penetrating component 210 relative to the water tank 220 in the vertical direction can be adjusted. That is, after the slope of the penetrating component 210 meets the design requirements, the weld seams of the penetrating component 210 and the water tank 220 are assembled and welded to form the modular unit 200. By shifting the focus A of the assembly construction activities of the water tank 220 and the penetrating component 210 from the noisy and confined construction site to a workshop with a controllable environment and easy quality management, a modular construction precision closed-loop control model can be established, improving construction and installation quality control and risk prevention, and enhancing the rationality of the construction process. Simultaneously, it avoids the impact of environmental and personnel factors on construction quality during on-site civil engineering operations. Precise positioning is possible without external interference, effectively reducing assembly errors between water tank 220 and through-piece 210, ensuring overall assembly accuracy, and guaranteeing the compatibility between through-piece 210 and water tank 220 modules. In-workshop assembly and welding allows for better and more precise control of temperature and humidity, reducing welding stress and deformation. Defects can be detected and repaired immediately, avoiding on-site rework, reducing welding defects such as porosity and cracks, and minimizing on-site scaffolding and high-altitude work. This reduces construction risks, improves the welding quality of through-piece 210 and water tank 220, and reduces project time and labor costs.

[0029] Step S120: Transport multiple of the above-mentioned module units 200 to the above-mentioned construction site; Step S120 includes: step S121 and step S122.

[0030] Among them, step S121: Based on the hoisting simulation results, determine the overall center of gravity A position and the hoisting point B position of the above module unit 200; Understandably, after completing the welding of module unit 200, the module unit 200 as a whole can be modeled, and the positions of the center of gravity A and lifting point B of module unit 200 can be calculated in the hoisting simulation software. This will allow for the accurate location of the center of gravity A of module unit 200 and the reasonable design of the position of lifting point B, ensuring subsequent hoisting stability and improving reliability.

[0031] Step S122: The sling is attached to the above-mentioned lifting point B. The hoisting equipment lifts the above-mentioned module unit 200 into the flatbed trailer through the sling. The above-mentioned flatbed trailer then transports the above-mentioned module unit 200 to the temporary storage area of ​​the above-mentioned construction site.

[0032] Figure 3 This diagram illustrates the distribution of the center of gravity A, lifting point B, and support 230 of a module unit 200 according to one embodiment of this disclosure. It is understood that a temporary storage area can be designated at the construction site, and this area should be located in a location less affected by civil construction work and environmental factors. A sling can be used to suspend the module unit 200 at lifting point B, and after wrapping it around the through-piece 210 at least twice, a shackle can be used for connection. A truck crane or tower crane can be used to lift the module unit 200 into a flatbed trailer, transport it to the temporary storage area, and then the sling can be removed, thus completing the temporary storage of the module unit 200.

[0033] In some examples, there are two suspension points B, which are respectively located on both sides of the center of gravity A and are equidistant from the center of gravity A. The distance between each suspension point B and the center of gravity A is 4m to 5m.

[0034] Understandably, there can be two lifting points B, located on either side of the center of gravity A. The distance between the two lifting points B and the center of gravity A is equal to ensure uniform lifting force and improve stability.

[0035] For example, the overall weight of the module unit 200 can be 12.5T. The distance between the two lifting points B and the center of gravity A is 4.5m. Two 18m slings with a maximum load capacity of 20T can be used to hang it on the lifting point B. The slings wrap around the through piece 210 twice and then connect it with a 25T shackle.

[0036] Step S130: After the civil engineering inspection at the construction site is qualified, determine the first installation position of the above-mentioned module unit 200 and the second installation position of the support structure according to the above-mentioned design drawings; Step S130 includes steps S131 to S133.

[0037] Among them, step S131: inspect the flatness and height of the civil engineering works at the construction site; Step S132: After confirming that the flatness and height of the above-mentioned civil works meet the design requirements, according to the design orientation angle corresponding to each of the above-mentioned module units 200 in the above-mentioned design drawings, a second layout operation is carried out at the above-mentioned construction site. The second layout operation is to lay out the direction of the above-mentioned penetrating member 210. Understandably, a second layout operation can be conducted on the construction site based on the design orientation angles corresponding to each module unit 200 specified in the design drawings. The design orientation angle is the angle between the axis of the penetrating component 210 in the top view of the nuclear reactor and the clockwise direction of the horizontal layout. This second layout operation determines the installation orientation of the penetrating component 210 on the construction site, facilitating subsequent installation work and improving installation efficiency.

[0038] For example, Figure 4 This is an installation diagram of a module unit 200 according to an embodiment of the present disclosure. A total of five module units 200 can be provided, with corresponding design orientation angles of 25°, 155°, 200°, 286° and 340°, respectively. A second layout operation can be carried out on the construction site according to the design orientation angle of each module unit 200.

[0039] Step S133: Determine the second installation position of the support structure corresponding to each of the above-mentioned through-holes 210 according to the orientation of each through-hole 210.

[0040] Understandably, the second installation position of the support structure can be determined based on the orientation of the through-piece 210 of each module unit 200 and the design requirements of the support structure in the design drawings, so as to facilitate the subsequent installation of the support structure and improve installation efficiency.

[0041] In some examples, the step of determining the second installation position of the support structure corresponding to each of the through-pieces 210 according to the orientation of each through-piece 210 includes: the support structure includes brackets 230; determining the second installation positions of multiple brackets 230 along the orientation of the through-pieces 210 according to the number and spacing of the brackets 230 required by the design drawings; and calibrating the height position of each bracket 230 according to the slope design requirements of the through-pieces 210.

[0042] Understandably, the support structure can utilize multiple brackets 230, arranged at intervals to support the through-piece 210. Specifically, the second installation positions of the multiple brackets 230 can be determined along the direction of the through-piece 210 according to the number and spacing of the brackets 230 required by the design drawings. Simultaneously, considering the slope design requirements of the through-piece 210, the height of the multiple brackets 230 of a through-piece 210 should gradually decrease from near the water tank 220 to far away from the water tank 220. The second installation position and height of each bracket 230 can be marked using paint or a marker, and the slope of the through-piece 210 can be determined by the height difference between the two brackets 230 with the largest spacing.

[0043] Step S140: Transport the plurality of the above-mentioned module units 200 to the above-mentioned first installation position, and install the above-mentioned support structure according to the above-mentioned second installation position, and install each of the above-mentioned module units 200 in the support structure at the corresponding position.

[0044] Step S140 includes steps S141 to S144.

[0045] In step S141: the multiple module units 200 are lifted from the temporary storage area and pass through the containment 240 from the reactor building at the construction site to the area where the first installation position is located. Understandably, after the calibration of support 230 is completed, multiple module units 200 can be hoisted from the temporary storage area to the first installation location. Specifically, during the hoisting process, crawler cranes or tower cranes can be used to smoothly lift the module units 200, and after reaching the location, they should be slowly lowered, paying attention to the landing direction, so that the module unit 200 as a whole can pass through the reactor building and containment vessel 240 to the area where the first installation location is located.

[0046] Step S142: Adjust the position of the module unit 200 so that the module unit 200 corresponds to the first installation position; Step S142 includes steps S1421 and S1422.

[0047] Among them, step S1421: support the above-mentioned module unit 200 with temporary support components and make preliminary adjustments to the position of the above-mentioned module unit 200; It is understandable that after the module unit 200 is hoisted to the area where the first installation position is located, the position of the module unit 200 may deviate from the first installation position. The module unit 200 can be initially adjusted by using temporary support components such as temporary brackets 230 and jacks to reduce the deviation from the first installation position.

[0048] Step S1422: The module unit 200 is supported by the gantry and the mobile flatbed vehicle. The precision of the through part 210 of the module unit 200 is adjusted, and the position of the module unit 200 is detected so that the module unit 200 corresponds to the first installation position.

[0049] Understandably, after the initial adjustment is completed, the position of the penetrating component 210 can be precisely adjusted by using a gantry and a mobile flatbed vehicle set inside the penetrating component 210. During the precision adjustment process, the position of the module unit 200 is detected. Once the module unit 200 is detected to be in the first installation position, the adjustment work is stopped to ensure that the subsequent installation work of the module unit 200 and the bracket 230 can be carried out quickly and stably, thereby improving reliability.

[0050] Step S143: Install the bracket 230 according to the marked second installation position and the marked height position; It is understandable that after the position adjustment of the module unit 200 is completed, multiple brackets 230 can be installed along the corresponding through member 210 by means of the marked second installation position and the marked height position.

[0051] Step S144: Install each of the above-mentioned module units 200 onto the plurality of above-mentioned brackets 230 in the corresponding orientation.

[0052] like Figure 5 The diagram shown is a schematic assembly drawing of the through-piece 210 and the bracket 230. After completing the installation and adjustment of the bracket 230 and confirming its height, position, and spacing, the modular unit 200 can be installed on the bracket 230 to complete the assembly of the modular unit 200. Since the modular assembly of the through-piece 210 and the water tank 220 has been completed in the workshop, only installation work needs to be carried out on the construction site. This avoids the influence of the civil engineering site environment on the installation and welding of the through-piece 210 and the water tank 220, reduces on-site construction time, and avoids waiting for materials and equipment, as well as idle personnel. This shortens the overall construction cycle, improves construction efficiency, reduces construction risks, and reduces project time losses and labor costs.

[0053] In some examples, the modular construction method for the penetration 210 and water tank 220 of the nuclear reactor also includes: after all the above-mentioned module units 200 are installed on the corresponding support structure, all the above-mentioned module units 200 are wrapped and protected until concrete is poured.

[0054] Understandably, after the installation of module unit 200 is completed, it can be wrapped with rainproof or fireproof cloth to protect the finished product until concrete is poured, thereby improving reliability.

[0055] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of the invention.

[0056] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0057] It should be understood that in the description of this invention, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship as commonly placed when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0060] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0061] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0062] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. A modular construction method for the penetration components and water tank of a nuclear reactor, characterized in that, include: According to the design drawings, the through-piece and the water tank are constructed in a modular manner in the workshop to form modular units; Transport multiple of the module units to the construction site; After the civil engineering inspection at the construction site is deemed qualified, the first installation position of the module unit and the second installation position of the supporting structure are determined according to the design drawings. The multiple module units are transported to the first installation position, and the support structure is installed according to the second installation position, with each module unit installed in the support structure at the corresponding position.

2. The modular construction method for the penetration components and water tank of a nuclear reactor according to claim 1, characterized in that, Also includes: After the penetrating component, the water tank, and the installation accessories are transported to the workshop, they are inspected and accepted. The environment of the workshop and the modular construction equipment are also tested to meet the requirements of modular construction.

3. The modular construction method for the penetration components and water tank of a nuclear reactor according to claim 2, characterized in that, The steps for modularly constructing the penetrating component and water tank in the workshop according to the design drawings to form modular units include: The workshop was divided into construction areas, which were then isolated and subjected to pollution prevention treatment. According to the design drawings, a first layout operation is carried out in the construction area, wherein the first layout operation is to lay out the outline of the water tank and the axis of the through piece; The water tank and the through-piece are placed according to the results of the first layout operation. After checking and verifying that the slope of the through-piece meets the design requirements, the through-piece and the water tank are assembled and welded to form the module unit.

4. The modular construction method for the penetration components and water tank of a nuclear reactor according to claim 3, characterized in that, The steps of transporting multiple said modular units to the construction site include: Based on the hoisting simulation results, the overall center of gravity and hoisting point positions of the module unit are determined; The slings are attached to the lifting points, and the hoisting equipment uses the slings to lift the module unit into the flatbed trailer. The flatbed trailer then transports the module unit to the temporary storage area at the construction site.

5. The modular construction method for the penetration components and water tank of a nuclear reactor according to claim 4, characterized in that, There are two lifting points, which are respectively located on both sides of the center of gravity and are equidistant from the center of gravity. The distance between each lifting point and the center of gravity is 4m to 5m.

6. The modular construction method for the penetration components and water tank of a nuclear reactor according to claim 4, characterized in that, After the civil engineering inspection at the construction site is deemed qualified, the steps of determining the first installation position of the module unit and the second installation position of the supporting structure according to the design drawings include: The flatness and height of the civil engineering structures at the construction site were inspected. After confirming that the flatness and height of the civil engineering work meet the design requirements, a second layout operation is carried out on the construction site according to the design orientation angle corresponding to each module unit of the design drawings. The second layout operation is to lay out the direction of the penetrating component. Based on the orientation of each through member, determine the second installation position of the support structure corresponding to each through member.

7. The modular construction method for the penetration components and water tank of a nuclear reactor according to claim 6, characterized in that, The step of determining the second installation position of the support structure corresponding to each through member based on the orientation of each through member includes: The support structure includes brackets, and according to the number and spacing of the brackets required by the design drawings, the second installation positions of a plurality of the brackets are determined along the direction of the through member; According to the slope design requirements of the through-piece, the height position of each bracket is calibrated.

8. The modular construction method for the penetration components and water tank of a nuclear reactor according to claim 7, characterized in that, The step of transporting the plurality of module units to the first installation position and installing the support structure according to the second installation position, wherein each module unit is installed in the support structure at the corresponding position, includes: Multiple module units are lifted from the temporary storage area and pass through the containment structure from the reactor building at the construction site to the area where the first installation location is located. Adjust the position of the module unit so that the module unit corresponds to the first installation position; Install the bracket according to the calibrated second installation position and the calibrated height position; Each of the module units is mounted on one of the brackets in the corresponding orientation.

9. The modular construction method for the penetration components and water tank of a nuclear reactor according to claim 8, characterized in that, The step of adjusting the position of the module unit to correspond to the first installation position includes: The module unit is supported by temporary support components, and the position of the module unit is initially adjusted. The module unit is supported by a gantry and a mobile flatbed vehicle. The precision of the through-piece of the module unit is adjusted, and the position of the module unit is detected so that the module unit corresponds to the first installation position.

10. The modular construction method for the penetration components and water tank of a nuclear reactor according to claim 1, characterized in that, Also includes: After all the module units are installed on the corresponding support structure, all the module units are wrapped and protected until concrete is poured.

Images