Integrated reactor top assembly, reactor and reactor top cable installation method

Abstract

The invention provides an integrated reactor top assembly, a reactor and a reactor top cable installation method, the integrated reactor top assembly comprises a shroud, a cable support plate and at least two layers of cable trays, one end of the shroud is connected with a pressure vessel top cover, and a control rod driving mechanism is located in the shroud; the cable supporting plate is arranged in the shroud and is positioned above the control rod driving mechanism; the at least two layers of cable trays are stacked in the axial direction of the shroud and are arranged above the cable supporting plate; wherein a connector panel is arranged on the inner wall, above the cable tray, of the shroud, and a cable connected with the control rod driving mechanism passes through the cable supporting plate and the cable tray and is connected to the connector panel. According to the reactor top assembly, the connector panel is arranged in the surrounding cylinder, so that the external space occupation of the integrated reactor top assembly is reduced, the structural size of the integrated reactor top assembly is reduced, and equipment can be conveniently hoisted and stored in a refueling pool.

Description

Technical Field

[0001] The present invention relates to the technical field of reactor top cable arrangement, and in particular to an integrated top assembly, a reactor and a method for installing the top cable. Background Art

[0002] The integrated stack top assembly is installed above the reactor pressure vessel top cover and integrates cable layout and management functions. These stack top cables mainly include rod control cables, rod position cables, core instrument cables and other stack top cables.

[0003] Currently, newly built and in-service integrated pile top assemblies mainly use external cable trays. The cable trays are installed on the periphery of the integrated pile top assembly casing assembly. The pile top cables pass through the inside of the casing, flipped over to the cable tray outside the casing, and laid from the side of the casing close to the pool wall to the operating platform through the cable bridge.

[0004] Due to the large number of cables on the top of the reactor, the cable tray structure is large in size, occupying more space on the top of the reactor, which has an adverse impact on the design, manufacture and maintenance of the integrated top assembly, and also has an adverse impact on the application of the integral main bolt tensioner.

[0005] Based on this, the inventor of the present application proposes an integrated stack top assembly, a reactor, and a stack top cable installation method in order to solve the above technical problems. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the defects in the prior art that the arrangement of the stack top cables will have an adverse effect on the design, manufacture and maintenance of the integrated stack top assembly and an adverse effect on the application of the integral main bolt tensioning machine, and to provide an integrated stack top assembly, a reactor and a stack top cable installation method.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] The present invention provides an integrated stack top assembly, which is characterized by comprising:

[0009] A shroud, one end of which is connected to the top cover of the pressure vessel, and the control rod drive mechanism is located in the shroud;

[0010] a cable support plate, disposed in the shroud and above the control rod drive mechanism;

[0011] At least two layers of cable trays are stacked axially along the circumference, and at least two layers of the cable trays are arranged above the cable support plate; wherein,

[0012] The enclosure is provided with a connector panel on the inner wall above the cable tray, and the cables connected to the control rod drive mechanism are connected to the connector panel via the cable support plate and the cable tray.

[0013] According to one embodiment of the present invention, the cable support plate is arranged in an annular shape and has at least one group of supporting members arranged opposite to each other on the upper part, and the opposite supporting members are connected by steel cables;

[0014] The cable is horizontally laid along the steel cable to the inner wall side of the enclosure.

[0015] According to one embodiment of the present invention, the cable support plate is provided with two groups of support members, namely a first support member, a second support member, a third support member and a fourth support member, the first support member is arranged opposite to the fourth support member, the second support member is arranged opposite to the third support member, and the first support member, the second support member, the third support member and the fourth support member are uniformly distributed around the circumference of the cable support plate;

[0016] The first support member, the second support member, the third support member and the fourth support member are each provided with a plurality of connection columns, and the opposite connection columns are connected by the steel cable.

[0017] According to an embodiment of the present invention, the steel cables between the first support member and the fourth support member are arranged crosswise with the steel cables between the second support member and the third support member.

[0018] According to one embodiment of the present invention, each of the cable trays is arranged non-overlappingly in projection along the axial direction of the shroud.

[0019] According to one embodiment of the present invention, at least two partitions are arranged on the connector panel, and each partition matches a different type of top-of-stack cable.

[0020] According to one embodiment of the present invention, at least two of the partitions are circumferentially spaced apart around the inner side of the shroud.

[0021] According to one embodiment of the present invention, the enclosure includes a first cylinder body for accommodating the control rod drive mechanism and a second cylinder body for mounting the cable support plate, the cable tray and the connector panel;

[0022] The first cylinder and the second cylinder are connected along the axial direction of the reactor pressure vessel.

[0023] The present invention also provides a reactor, comprising: the integrated stack top assembly as described above.

[0024] The present invention also provides a method for installing a stack top cable, which is implemented by using the integrated stack top assembly as described above, and the method comprises:

[0025] Placing the cable tray inside the enclosure so that the top cable is connected to the connector panel inside the enclosure;

[0026] The external cables of the cable tray outside the enclosure are connected to the top-of-stack cables through the connector panel.

[0027] The positive and progressive effects of the present invention are:

[0028] The integrated stack top assembly of the present invention embeds the connector panel in the enclosure, which reduces the space occupied by the integrated stack top assembly outside, reduces the structural size of the integrated stack top assembly, and facilitates the lifting and storage of the equipment inside the refueling pool.

[0029] Moreover, the built-in cable can reduce the impact of cable layout on material replacement operation and maintenance and the application of the integral bolt tensioning machine, which is conducive to lifting the integral bolt tensioning machine into or out of the material replacement pool, and provides favorable conditions for the positioning of the integral tensioning machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0031] Figure 1 It is a schematic diagram of the arrangement of the integrated stack top assembly of the present invention;

[0032] Figure 2 for Figure 1 A schematic diagram of the structure of the cable support plate;

[0033] Figure 3 for Figure 1 Schematic diagram of the layout of the cable tray and connector panel;

[0034] Figure 4 for Figure 1 Top view of the cable tray.

[0035] 1. surrounding cylinder; 11. first cylinder body; 12. second cylinder body;

[0036] 2. Pressure vessel top cover;

[0037] 3. Control rod drive mechanism;

[0038] 4. Cable support plate; 41. Support member; 42. Steel cable; 43. First support member; 44. Second support member; 45. Third support member; 46. Fourth support member; 47. Connecting column;

[0039] 5. Cable tray;

[0040] 6. Connector panel; 61. Partition. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description herein. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0043] Please refer to Figures 1 to 4 The present invention proposes an integrated stack top assembly, which includes a shroud 1, a cable support plate 4 and at least two layers of cable trays 5. One end of the shroud 1 is connected to the pressure vessel top cover 2, and the control rod drive mechanism 3 is located in the shroud 1; the cable support plate 4 is arranged in the shroud 1 and above the control rod drive mechanism 3; at least two layers of cable trays 5 are stacked axially along the shroud 1, and at least two layers of cable trays 5 are arranged above the cable support plate 4; wherein, a connector panel 6 is arranged on the inner wall of the shroud 1 above the cable tray 5, and the cable connected to the control rod drive mechanism 3 (corresponding to the stack top cable) is connected to the connector panel 6 via the cable support plate 4 and the cable tray 5.

[0044] It can be seen that each control rod drive mechanism 3 generally has at least two groups of cables, one of which is the rod position cable and the other is the rod control cable. Because the cable support plate 4, cable tray 5 and connector panel 6 are arranged in the shroud 1, the cables are connected to the connector panel 6 via the cable support plate 4 and cable tray 5 in sequence, and the cable connection process is realized in the shroud 1, thereby simplifying the size of the pile top structure and reducing the impact of the cable arrangement on the material replacement operation and maintenance and the application of the integral bolt tensioner.

[0045] Moreover, the built-in arrangement of the cable tray 5 reduces the space occupied by the external part of the integrated pile top assembly, thereby reducing the structural dimensions of the integrated pile top assembly, making it easier to hoist and store the equipment inside the refueling pool. It is also beneficial for the integral bolt tensioner to be hoisted into or out of the refueling pool, providing favorable conditions for the integral tensioner to be in place.

[0046] In one embodiment, the cable support plate 4 is arranged in a ring shape and has at least one group of support members 41 arranged opposite to each other on the upper portion. The opposite support members 41 are connected by steel cables 42 ; the cable is horizontally laid along the steel cables 42 to the inner wall side of the enclosure 1 .

[0047] Because there are too many cables and their types, support members 41 are set on the cable support plate 4, and the relative support members 41 are connected by steel cables 42. In this way, cables at different positions are laid along different steel cables 42 to the inner wall side of the enclosure 1, which is conducive to the orderly arrangement of the cables.

[0048] Please refer to Figure 2 Two groups of support members 41 are provided on the cable support plate 4, which are a first support member 43, a second support member 44, a third support member 45 and a fourth support member 46. The first support member 43 and the fourth support member 46 are arranged opposite to each other, and the second support member 44 and the third support member 45 are arranged opposite to each other. The first support member 43, the second support member 44, the third support member 45 and the fourth support member 46 are evenly distributed around the cable support plate 4 in the circumferential direction; a plurality of connecting columns 47 are provided on the first support member 43, the second support member 44, the third support member 45 and the fourth support member 46, and the opposite connecting columns 47 are connected by steel cables 42.

[0049] Furthermore, the steel cables 42 between the first support member 43 and the fourth support member 46 are arranged crosswise with the steel cables 42 between the second support member 44 and the third support member 45 .

[0050] Preferably, the direction from the first support member 43 to the fourth support member 46 is arranged perpendicularly to the direction from the second support member 44 to the third support member 45, so that the steel cable 42 connected between the first support member 43 and the fourth support member 46 and the steel cable 42 connected between the second support member 44 and the third support member 45 are arranged perpendicularly and crosswise.

[0051] It can be seen that the height of the steel cable 42 on the first support member 43 and the fourth support member 46 is consistent with the height of the steel cable 42 on the second support member 44 and the third support member 45; or, the height of the steel cable 42 on the first support member 43 and the fourth support member 46 is inconsistent with the height of the steel cable 42 on the second support member 44 and the third support member 45, which can be adjusted according to actual needs.

[0052] By designing multiple layers of horizontally staggered steel cables 42 , it is convenient to lay cables at different positions along different steel cables 42 to the inner wall side of the enclosure 1 .

[0053] Furthermore, a plurality of cable support plates 4 may be stacked so that different types of cables are connected to the cable support plates 4 at different heights.

[0054] Please refer to Figure 3 and Figure 4Each cable tray 5 is arranged non-overlappingly in the axial direction of the enclosure 1. Multiple layers of cable trays 5 can be arranged as needed.

[0055] Specifically, at least two partitions 61 are provided on the connector panel 6, and each partition 61 matches a different type of top-of-stack cable to achieve different cable isolation requirements.

[0056] It can be seen that at least two partitions 61 are arranged circumferentially and spaced apart around the inner side of the shroud 1 .

[0057] The cable tray 5 is arc-shaped or ring-shaped and is installed near the inner wall of the casing 1. Different cables can be installed upward to the corresponding partitions 61 on the connector panel 6 through cable trays 5 at different positions or layers. This makes the cable arrangement more orderly and avoids the position of the control rod drive mechanism 3, making it easier to lift and replace the control rod drive mechanism 3 separately.

[0058] That is, along the axial direction of the pressure vessel, the cable support plate 4 and the cable tray 5 are both hollow, and the horizontal cross arrangement of the steel cables 42 is used to leave space for the control rod drive mechanism 3 to pass up and down, so as to facilitate the separate lifting and replacement of the control rod drive mechanism 3.

[0059] The middle part of the cable tray 5 is an escape space for escaping the control rod drive mechanism 3 below, so the cable laying method is as follows:

[0060] One end of the first type of cable is connected to the control rod drive mechanism 3, and then is laid upward and fixed on the steel cable 42 on the cable support plate 4, and then is horizontally laid along the steel cable 42 to the inner wall side of the casing 1, and then is laid upward and flipped to the cable tray 5 near the lower layer, and finally is laid to a partition 61 at the position of the connector panel 6.

[0061] Similarly, one end of the second type of cable is connected to the control rod drive mechanism 3, and then laid upward and fixed on the steel cable 42 on the cable support plate 4, and then horizontally laid along the steel cable 42 to the inner wall side close to the surrounding tube 1, and then laid upward and flipped to the cable tray 5 in the middle layer, and finally laid to another partition 61 at the position of the connector panel 6.

[0062] Similarly, the third type of cable is arranged in a similar manner to the above, except that when it is flipped upward near the inner wall of the enclosure 1, it is flipped into the upper cable tray 5 and finally laid to another partition 61 at the position of the connector panel 6.

[0063] The number of layers of the cable tray 5 is not limited here, and physical isolation of different types of cables can be achieved according to different types of cables, such as strong current, weak point, 1E class cable and non-1 class cable.

[0064] Moreover, above the cable tray 5 is a connector panel 6, and partitions 61 on the connector panel 6 correspond to different layers of cable trays 5. Cable connectors are installed on the connector panel 6 to facilitate cable connection or disconnection operations.

[0065] The cable tray 5 and the cable support plate 4 are arranged in layers and staggered, respectively, so that the cables on the top of the pile can be arranged in an orderly manner, while avoiding the position of the control rod drive mechanism 3, which is convenient for the separate lifting and replacement of the control rod drive mechanism 3.

[0066] Please continue to refer to Figure 1 The casing 1 includes a first cylinder 11 for accommodating a control rod drive mechanism 3 and a second cylinder 12 for installing a cable support plate 4, a cable tray 5 and a connector panel 6; the first cylinder 11 and the second cylinder 12 are connected along the axial direction of the reactor pressure vessel.

[0067] It can be known that the first cylinder 11 and the second cylinder 12 can be connected by welding or by a plurality of threaded connectors, which is not limited here.

[0068] Dividing the surrounding tube 1 into a first tube body 11 and a second tube body 12 can realize the separate design and processing of the cable support plate 4, the cable tray 5 and the connector panel 6 structure, avoid excessive processing of the pile top on site, reduce the processing difficulty and improve the construction efficiency.

[0069] The present invention also provides a reactor, comprising the above-mentioned integrated stack top assembly.

[0070] The connector panel 6 of the present invention is arranged inside the shroud 1, which reduces the external dimensions of the shroud 1 and simplifies the structural design of the integrated top assembly. The cable tray 5 adopts a multi-layer design to achieve physical isolation of different types of cables. A steel cable 42 is arranged on the cable support plate 4 to facilitate orderly laying and arrangement of the cables above the control rod drive mechanism 3, thereby reducing the impact of the cable arrangement on material replacement operation and maintenance and the application of the integral bolt tensioner.

[0071] The present invention also provides a cable installation method, which is implemented by using the above integrated stack top assembly, and the method comprises:

[0072] Place the cable tray inside the enclosure so that the top cable is connected to the connector panel inside the enclosure;

[0073] The external cables of the cable tray outside the enclosure are connected to the top cables through the connector panel.

[0074] That is, the cable tray of the present invention is built into the enclosure 1, and the top cables are centrally laid on the connector panel on one side of the enclosure, which is convenient for connection with the cable tray cables, reduces the overall external dimensions of the enclosure, and simplifies the structural design of the integrated top assembly.

[0075] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "install", "connect", "connect", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0076] The present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or multiple times in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0077] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. An integrated stack top assembly, characterized in that: include: A shroud, one end of which is connected to the top cover of the pressure vessel, and the control rod drive mechanism is located in the shroud; a cable support plate, disposed in the shroud and above the control rod drive mechanism; At least two layers of cable trays are stacked axially along the circumference, and at least two layers of the cable trays are arranged above the cable support plate; wherein, The enclosure is provided with a connector panel on the inner wall above the cable tray, and the cables connected to the control rod drive mechanism are connected to the connector panel via the cable support plate and the cable tray.

2. The integrated stack top assembly according to claim 1, characterized in that: The cable support plate is arranged in an annular shape and has at least one group of supporting members arranged opposite to each other on the upper part, and the opposite supporting members are connected by steel cables; The cable is horizontally laid along the steel cable to the inner wall side of the enclosure.

3. The integrated stack top assembly according to claim 2, characterized in that: The cable support plate is provided with two groups of support members, namely a first support member, a second support member, a third support member and a fourth support member, the first support member is arranged opposite to the fourth support member, the second support member is arranged opposite to the third support member, and the first support member, the second support member, the third support member and the fourth support member are uniformly distributed around the circumference of the cable support plate; The first support member, the second support member, the third support member and the fourth support member are each provided with a plurality of connection columns, and the opposite connection columns are connected by the steel cable.

4. The integrated stack top assembly according to claim 3, characterized in that: The steel cables between the first support member and the fourth support member are arranged crosswise with the steel cables between the second support member and the third support member.

5. The integrated stack top assembly according to claim 1, characterized in that: Each of the cable trays is arranged non-overlappingly in projection along the axial direction of the shroud.

6. The integrated stack top assembly according to claim 5, characterized in that: At least two partitions are arranged on the connector panel, and each partition matches a different type of top-of-stack cable.

7. The integrated stack top assembly according to claim 6, characterized in that: At least two of the partitions are circumferentially spaced apart around the inner side of the shroud.

8. The integrated stack top assembly according to claim 1, characterized in that: The enclosure includes a first cylinder body for accommodating the control rod drive mechanism and a second cylinder body for mounting the cable support plate, the cable tray and the connector panel; The first cylinder and the second cylinder are connected along the axial direction of the reactor pressure vessel.

9. A reactor, characterized in that: include: An integrated stack top assembly as claimed in any one of claims 1 to 8.

10. A method for installing a pile top cable, characterized in that: The method is implemented by using the integrated stack top assembly according to any one of claims 1 to 8, and comprises: Placing the cable tray inside the enclosure so that the top cable is connected to the connector panel inside the enclosure; The external cables of the cable tray outside the enclosure are connected to the top-of-stack cables through the connector panel.

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