Guiding mounting device and mounting device and method for reactor internals

Abstract

The application provides a guide installation device and a reactor in-core component installation device and method, which are suitable for installing upper in-core components and lower in-core components of a reactor, and comprise: at least two guide sleeves, including a first guide sleeve and a second guide sleeve, the length of the first guide sleeve being smaller than the length of the second guide sleeve, the first guide sleeve being used for guiding installation of the upper in-core components, and the second guide sleeve being used for guiding installation of the lower in-core components; at least two base assemblies, each of which is provided with a guide column, and the guide column is suitable for cooperating with one of the at least two guide sleeves; and an operating tool, the lower end of the operating tool being provided with a connecting piece, and the operating tool is suitable for controlling the guide sleeve to be sleeved into the guide column or pulled out of the guide column through the connecting piece. The guide installation device and the reactor in-core component installation device and method provided by the application can flexibly switch different guide devices to adapt to different guide heights.

Description

Technical Field

[0001] This invention relates primarily to the field of reactor technology, and more particularly to a guiding installation device and an installation device and method for reactor internal components. Background Technology

[0002] Regarding the reactor installation process, when the in-core components (ICPs) lifting equipment lifts the upper ICPs, a guide height of approximately 4.2m is typically required. Lifting the upper ICPs too high can lead to insufficient shielding water layer height, resulting in the plant dose rate exceeding safety requirements. When lifting the lower ICPs, a guide height of approximately 7.2m is required. If the guide height is only 4.2m, there will be no guidance for approximately 3m of the lifting process. Since the lower ICP lifting process requires high precision, the lack of guidance could pose a risk of equipment collision or interference.

[0003] Currently, during major overhauls of pressurized water reactor nuclear power plants both domestically and internationally, the length of guide columns is typically changed by draining the water tank and replacing the entire guide column with two different lengths, or by using threaded connections to switch the guide column height. When a longer guide column is needed, an extension section is installed. These methods may have drawbacks and potential risks, such as inconvenient installation and unsafe operation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a guide installation device and an installation device and method for reactor internal components, which can flexibly switch different guide sleeves to adapt to different guide heights.

[0005] To address the aforementioned technical problems, the present invention provides a guiding installation device suitable for installing upper and lower in-core components of a reactor, comprising: at least two guide sleeves, including a first guide sleeve and a second guide sleeve, wherein the length of the first guide sleeve is less than the length of the second guide sleeve, the first guide sleeve is used for guiding the installation of the upper in-core component, and the second guide sleeve is used for guiding the installation of the lower in-core component; at least two base components, each base component having a guide post, the guide post being adapted to cooperate with one of the at least two guide sleeves; and an operating tool, the lower end of the operating tool having a connector, the operating tool being adapted to control the guide sleeves to be fitted into or pulled out of the guide posts via the connector.

[0006] Optionally, each of the guide sleeves has a connecting hole at its upper end that mates with the connector, the connector including an interlocking claw adapted to pass through the connecting hole and drive the guide sleeve into or out of the guide post.

[0007] Optionally, the guide post includes a first position and a second position near both ends of the guide post. When the guide sleeve is fitted onto the guide post, the guide post is adapted to cooperate with the guide sleeve at the first position and the second position respectively to fix the guide sleeve and the guide post relatively.

[0008] Optionally, the guide post includes a first annular protrusion located at the first position and a second annular protrusion located at the second position, and the guide sleeve includes a first annular groove and a second annular groove on its inner wall, wherein when the guide sleeve is fitted into the guide post, the first annular protrusion and the first annular groove are adapted to engage at the first position, and the second annular protrusion and the second annular groove are adapted to engage at the second position.

[0009] Optionally, the first annular protrusion and the first annular groove have the same first width in the vertical direction, the second annular protrusion and the second annular groove have the same second width in the vertical direction, and the range of the first width and the second width is 45mm to 55mm.

[0010] Optionally, when the guide sleeve is fitted into the guide post, there is a gap between the guide sleeve and the guide post in the section other than the first position and the second position, and the gap ranges from 0.043 to 0.169 nm.

[0011] Optionally, the guide post is further provided with a fixing pin, and the guide sleeve is further provided with a Z-shaped groove that mechanically cooperates with the fixing pin.

[0012] Optionally, the operating tool is configured to: control the guide sleeve to rotate along a first direction via the connector to initiate mechanical engagement between the fixing pin and the Z-groove; control the guide sleeve to continue lowering a first preset distance from the position where mechanical engagement begins, so that the fixing pin and the Z-groove are fully engaged; control the guide sleeve to rise a second preset distance from the position where full engagement begins, so that the fixing pin and the Z-groove begin to separate; and control the guide sleeve to rotate along a second direction opposite to the first direction via the connector to completely separate the fixing pin from the Z-groove from the position where separation begins.

[0013] Optionally, the distance range of both the first preset distance and the second preset distance is 50 to 70 mm.

[0014] To address the aforementioned technical problems, the present invention provides an installation apparatus for reactor internals, comprising: a guiding installation device as described above; and an internals hoist, adapted to install the upper internals and lower internals of the reactor via the guiding installation device.

[0015] To solve the above-mentioned technical problems, the present invention provides a method for installing reactor internal components, applicable to the guide installation device as described above. The installation method includes: operating the operating tool of the guide installation device to control the guide sleeve to be fitted onto or pulled out of the guide post on the base component through the connector of the operating tool, wherein the guide sleeve includes a first guide sleeve and a second guide sleeve; guiding the installation of the upper reactor internal components through the first guide sleeve, or guiding the installation of the lower reactor internal components through the second guide sleeve.

[0016] Compared with the prior art, the present invention, by setting guide sleeves of different lengths, can flexibly replace the guide sleeves remotely underwater to adapt to the different guiding heights required by different in-core components. The guide sleeves can be quickly disassembled and assembled, improving replacement efficiency. Attached Figure Description

[0017] The accompanying drawings are included to provide a further understanding of this application; they are incorporated into and constitute a part of this application. The drawings illustrate embodiments of this application and, together with this specification, serve to explain the principles of the invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of an in-core component installation device according to one embodiment of this application;

[0019] Figures 2 and 3 are partial schematic diagrams of a guide installation device according to an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the structure of a guide column in a guide installation device according to an embodiment of this application;

[0021] Figures 5-6 This is a schematic diagram of the structure of a guide sleeve in a guide installation device according to an embodiment of this application;

[0022] Figures 7-9 This is a schematic diagram of a guide installation device in a working state according to an embodiment of this application;

[0023] Figure 10 This is a schematic flowchart of a method for installing in-core components according to one embodiment of this application. Detailed Implementation

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0025] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0026] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0027] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0028] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0029] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. In addition, although the terminology used in this application is selected from commonly known and used terms, some terms mentioned in this application's specification may have been chosen by the applicant according to his or her judgment, and their detailed meanings are explained in the relevant sections of this description. Moreover, this application should be understood not only through the actual terms used, but also through the meaning implied by each term.

[0030] This application refers to Figure 1 An installation device 10 for reactor internals is proposed, comprising: a guiding installation device 100 (hereinafter referred to as "installation device 100") and an internals hoist 11, wherein the internals hoist 11 is adapted to install the upper internals and lower internals of the reactor through the guiding installation device 100.

[0031] Furthermore, the installation device 100 includes guide sleeves 200. In different embodiments of this application, the number of guide sleeves 200 is at least two. Specifically, in this embodiment, there are two guide sleeves 200, each including a first guide sleeve 101 and a second guide sleeve 102. The length of the first guide sleeve 101 is less than the length of the second guide sleeve 102. The first guide sleeve 101 is used to guide the installation of the upper in-core components, and the second guide sleeve 102 is used to guide the installation of the lower in-core components.

[0032] The mounting device 100 also includes two base components 103, which are fixedly mounted on the flange face of the reactor pressure vessel (not shown). Each base component 103 is provided with a guide post 104, which is adapted to cooperate with one of the two guide sleeves 200. For example, when it is necessary to install the upper in-core components, the guide post 104 cooperates with the first guide sleeve 101; when it is necessary to install the lower in-core components, the guide post 104 cooperates with the second guide sleeve 102. The guide post 104 is used in an underwater application environment in practice.

[0033] The installation device 100 also includes an operating tool 105, the lower end of which is provided with a connector 106. The operating tool 105 is adapted to be operated to quickly complete the replacement of the guide sleeve 200. For example, the guide sleeve 200 can be quickly replaced by a worker on an upper operating platform. The operating tool 105 is adapted to control the guide sleeve 200 to be fitted onto or pulled out of the guide post 104 via the connector 106. For example, the operating tool 105 can be lifted using a factory crane, and the guide sleeve 200 connected to the operating tool 105 can be manually replaced by a worker.

[0034] It is worth noting that, for the sake of explaining the structure of different guide sleeves 200, Figure 1 The first guide sleeve 101 and the second guide sleeve 102 are shown, but in actual applications, the first guide sleeve 101 and the second guide sleeve 102 are used separately. For example, when installing upper in-core components, the installation device 100 uses two first guide sleeves 101 for guidance, with one of the first guide sleeves positioned as follows: Figure 1 The first guide sleeve is located to the left of the in-core component lifting device 11, while the other first guide sleeve is located at position 101. Figure 1 The position of the second guide sleeve 102 is shown, therefore, when installing the upper in-core components, both sides of the in-core component lifting device 11 are equipped with first guide sleeves 101 to guide the installation of the upper in-core components. When it is necessary to install the lower in-core components, the installation device 100 uses two second guide sleeves 102 for guidance, one of which is positioned as shown in the diagram. Figure 1 The second guide sleeve 102 is located to the right of the in-core component lifting device 11, while the other second guide sleeve 102 is located at... Figure 1 The position of the first guide sleeve 101 is shown, therefore, when installing the lower in-core components, both the left and right sides of the in-core component lifting device 11 are equipped with second guide sleeves 102 to guide the installation of the lower in-core components. Figure 1As shown, the left side of the in-core component lifting device 11 shows a schematic diagram with the first guide sleeve 101 not yet inserted into the guide post 104, while the right side of the in-core component lifting device 11 shows a schematic diagram with the second guide sleeve 102 fully inserted into the guide post 104. Exemplarily, the first guide sleeve 101 and the second guide sleeve 102 are identical in all characteristics except for their length.

[0035] In this embodiment, the first guide sleeve 101 and the second guide sleeve 102 can meet the different guiding height requirements when installing internal components, and different guide sleeves 200 can be flexibly replaced in an underwater remote environment by using the operating tool 105.

[0036] Furthermore, depending on the specific implementation scenario, different guide sleeves can be replaced using the operating tool 105. Referring to Figures 2 and 3, Figure 2 shows a front view of the operating tool 105 connected to the guide sleeve 200 via the connector 106, and Figure 3 shows a side view of the operating tool 105 connected to the guide sleeve 200 via the connector 106. As shown in Figures 2 and 3, each guide sleeve 200 has a connecting hole 107 at its upper end that mates with the connector 106. The connector 106 includes an interlocking claw 1061, which is adapted to pass through the connecting hole 107 and drive the guide sleeve 200 to be fitted into the guide post 104 or pulled out of the guide post 104. For example, after the interlocking claw 1061 extends into the connecting hole 107, it can fix the guide sleeve 200, preventing the guide sleeve 200 from rotating during replacement. Moreover, through the design of the interlocking claw 1061 and the connecting hole 107, the operation of quickly replacing the guide sleeve 200 can be achieved, improving work efficiency.

[0037] Reference Figure 4 The guide post 104 includes a first position P and a first position Q near both ends of the guide post 104. When the guide sleeve 200 is fitted into the guide post 104, the guide post 104 is adapted to cooperate with the guide sleeve 200 at the first position P and the first position Q respectively, so that the guide sleeve 200 and the guide post 104 are relatively fixed.

[0038] Specifically Figure 4 This is a schematic diagram of the specific structure of guide post 104. Figure 5 This is a perspective view of the internal structure of the second guide sleeve 102. Figure 6 This is a schematic diagram of the external structure of the first guide sleeve 101. (See attached diagram.) Figure 4 and Figure 5As shown, the guide post 104 includes a first annular protrusion 1041 located at a first position P and a second annular protrusion 1042 located at a first position Q. The guide sleeve 200 (including a first guide sleeve 101 and a second guide sleeve 102) includes a first annular groove 2041 and a second annular groove 2042 on its inner wall. When the guide sleeve 200 is fitted onto the guide post 104, the first annular protrusion 1041 and the first annular groove 2041 are adapted to engage at the first position P, and the second annular protrusion 1042 and the second annular groove 2042 are adapted to engage at the first position Q. For example, the distance h between the first position P and the second position Q is approximately 1 m.

[0039] Specifically, the first annular protrusion 1041 and the first annular groove 2041 have the same first width w1 in the vertical direction, and the second annular protrusion 1042 and the second annular groove 2042 have the same second width w2 in the vertical direction, with both the first width w1 and the second width w2 ranging from 45mm to 55mm. The fit between the first annular protrusion 1041 and the first annular groove 2041, and the fit between the second annular protrusion 1042 and the second annular groove 2042, is a high-precision snap-fit ​​fit. Furthermore, when the guide sleeve 200 is fitted into the guide post 104, there is a horizontal gap between the guide sleeve 200 and the guide post 104 in the section S outside the first position P and the first position Q, with the gap ranging from 0.043 to 0.169nm. This gap allows the guide sleeve 200 to smoothly enter and exit the section S when inserted into or removed from the guide post 104, facilitating installation.

[0040] On the other hand, the guide post 104 is also provided with a fixing pin 108, and the guide sleeve 200 is also provided with a Z-shaped groove 109 that mechanically engages with the fixing pin 108. (Refer to...) Figures 7-9 , Figure 7 The diagram shows the state where the retaining pin 108 just begins to engage with the Z-slot 109. Figure 8 This diagram shows the state where the retaining pin 108 and the Z-slot 109 are beginning to mate but not yet fully engaged. Figure 9 The diagram shows the state where the retaining pin 108 and the Z-slot 109 are fully engaged.

[0041] Specifically, when it is necessary to insert the guide sleeve 200 into the guide post 104, such as Figure 7 As shown, when the guide sleeve 200 and the guide post 104 begin to mate, the fixing pin 108 just enters the Z-groove 109. When the fixing pin 108 reaches the first turning point A1 of the Z-groove 109, as... Figure 8 As shown, the operating tool 105 controls the rotation of the guide sleeve 200 along the first direction via the connector 106, causing the fixing pin 108 to move along the Z-groove 109 and reach the second turning point A2 of the Z-groove, and finally... Figure 9As shown, the operating tool 105 controls the guide sleeve 200 to continue descending a first preset distance from the initial mechanical engagement position via the connector 106, so that the fixing pin 108 is fully inserted into the Z-groove 109. When it is necessary to pull the guide sleeve 200 out of the guide post 104, initially the fixing pin 108 is fully inserted into the Z-groove 109 (e.g., Figure 9 As shown), at this time, the operating tool 105 controls the guide sleeve 200 to rise from the fully engaged position by a second preset distance through the connector 106, so that the fixing pin 108 and the Z-groove 109 begin to separate until the fixing pin 108 reaches the second turning angle A2. At this time, the guide sleeve 200 is controlled to rotate in a second direction opposite to the first direction through the connector 106, so that the fixing pin 108 moves along the Z-groove until the fixing pin reaches the first turning angle A1 until the fixing pin 108 and the Z-groove 109 are completely separated.

[0042] In this embodiment, for example, the first direction is counterclockwise and the second direction is clockwise. In other embodiments of this application, the first direction can be set to clockwise or counterclockwise depending on the direction of the Z-groove; this application is not limited to this. When the first direction is clockwise, the second direction is counterclockwise; when the first direction is counterclockwise, the second direction is clockwise. For example, the distance range of both the first preset distance and the second preset distance is 50–70 mm.

[0043] In this embodiment, the first annular protrusion 1041, the second annular protrusion 1042, the first annular groove 2041, the second annular groove 2042, the fixing pin 108, and the Z-shaped groove 109 are provided to effectively fix the guide sleeve 200 and the guide post, so that the guide sleeve 200 does not have the risk of falling off the guide post 104. Furthermore, the guide sleeve can be quickly disassembled and assembled by using the operating tool in conjunction with the guide sleeve.

[0044] Furthermore, this application also proposes a method 20 for installing reactor internals, applicable to the guide installation device proposed in any embodiment of this application, such as the installation device 100 described above. Flowcharts are used in this application to illustrate the operations performed by the system according to embodiments of this application. It should be understood that the preceding or following operations are not necessarily performed precisely in sequence. Instead, various steps can be processed in reverse order or simultaneously. Simultaneously, other operations may be added to these processes, or one or more steps may be removed from these processes. Installation method 20 includes steps S1 and S2.

[0045] Specifically, step S1 includes operating the operating tool of the guiding installation device to control the guide sleeve to be fitted onto or pulled out of the guide post on the base assembly via the connector of the operating tool, wherein the guide sleeve includes a first guide sleeve and a second guide sleeve; step S2 includes guiding the installation of the upper in-core components of the reactor via the first guide sleeve, or guiding the installation of the lower in-core components of the reactor via the second guide sleeve. Other details regarding installation method 20 can be found in the preceding description of the installation device 100, and will not be repeated here.

[0046] The basic concepts have been described above. Obviously, for those skilled in the art, the above disclosure is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0047] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0048] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0049] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0050] Although this application has been described with reference to specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, any changes or modifications to the above embodiments within the essential spirit of this application will fall within the scope of the claims of this application.

Claims

1. A guiding installation device suitable for installing the upper in-core components and lower in-core components of a reactor, characterized in that, include: At least two guide sleeves, including a first guide sleeve and a second guide sleeve, wherein the length of the first guide sleeve is less than the length of the second guide sleeve, the first guide sleeve is used to guide the installation of the upper in-core component, and the second guide sleeve is used to guide the installation of the lower in-core component. At least two basic components, each of which has a guide post adapted to engage with one of the at least two guide sleeves. Each guide post includes a first position and a second position near its two ends. When a guide sleeve is fitted onto the guide post, the guide post is adapted to engage with the guide sleeve at the first position and the second position respectively to fix the guide sleeve and the guide post relatively. The guide post includes a first annular protrusion at the first position and a second annular protrusion at the second position. The guide sleeve includes a first annular groove and a second annular groove on its inner wall. When the guide sleeve is fitted onto the guide post, the first annular protrusion and the first annular groove are adapted to engage at the first position, and the second annular protrusion and the second annular groove are adapted to engage at the second position. The guide post also has a fixing pin, and the guide sleeve also has a Z-shaped groove that mechanically engages with the fixing pin. An operating tool is provided with a connector at its lower end. The operating tool is adapted to control the guide sleeve to be fitted into or pulled out of the guide post via the connector. The operating tool is configured to: control the guide sleeve to rotate along a first direction via the connector to initiate mechanical engagement between the fixing pin and the Z-groove; control the guide sleeve to continue lowering a first preset distance from the position where mechanical engagement begins, so that the fixing pin and the Z-groove are fully engaged; control the guide sleeve to rise a second preset distance from the fully engaged position, so that the fixing pin and the Z-groove begin to separate; and control the guide sleeve to rotate along a second direction opposite to the first direction via the connector to completely separate the fixing pin from the Z-groove from the position where separation begins.

2. The guiding installation device as described in claim 1, characterized in that, Each of the guide sleeves has a connection hole at its upper end that mates with the connector, the connector including an interlocking claw adapted to pass through the connection hole and drive the guide sleeve into or out of the guide post.

3. The guiding installation device as described in claim 1, characterized in that, The first annular protrusion and the first annular groove have the same first width in the vertical direction, and the second annular protrusion and the second annular groove have the same second width in the vertical direction, and the range of the first width and the second width is 45mm~55mm.

4. The guiding installation device as described in claim 1, characterized in that, When the guide sleeve is fitted into the guide post, there is a gap between the guide sleeve and the guide post in the section other than the first position and the second position, and the gap ranges from 0.043 to 0.169 nm.

5. The guiding installation device as described in claim 1, characterized in that, The distance range of both the first preset distance and the second preset distance is 50~70mm.

6. An installation device for reactor internals, characterized in that, include: The guide mounting device as described in any one of claims 1-5; as well as The in-core component hoist is suitable for installing the upper and lower in-core components of the reactor via the guide installation device.

7. A method for installing reactor internals, characterized in that, The installation method, applicable to the guide installation device as described in any one of claims 1 to 5, comprises: An operating tool for operating the guide installation device is used to control the guide sleeve to be fitted onto the guide post on the base component or pulled out of the guide post via the connector of the operating tool, wherein the guide sleeve includes a first guide sleeve and a second guide sleeve. The upper in-core components of the reactor are installed by means of the first guide sleeve, or the lower in-core components of the reactor are installed by means of the second guide sleeve.

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