Support structure for reactors

Abstract

An embodiment of the present invention discloses a support structure for a reactor, wherein the reactor includes an equipment support, wherein the equipment support is used to support the equipment in the reactor, and wherein the support structure includes: a support portion, wherein the support portion is used to support the equipment support; a fixing portion, wherein the fixing portion is arranged on the support portion, and the equipment support is fixed to the fixing portion; wherein the fixing portion is provided with a reinforcement portion, wherein the reinforcement portion includes: an annular member, wherein the annular member is arranged on the fixing portion; and at least one fixed reinforcement member, wherein the fixed reinforcement member is arranged along the circumference of the annular member, and is used to improve the strength of the support structure. Such a support structure has high strength, so that the support structure can reliably support the internal components, equipment support and equipment in the reactor under seismic loads.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear reactors, and in particular to a supporting structure for a reactor. Background Art

[0002] Nuclear power structure is a major project of national energy strategy, with high construction cost. Once damaged by earthquake, it will lead to economic losses and difficult to repair after the earthquake. my country is a country with many earthquakes, and ensuring the safety of nuclear reactors under earthquakes is a key issue. The equipment in the reactor is supported on the support structure of the reactor, which requires the support structure of the reactor to have sufficient support strength to reliably support the components and equipment in the reactor under earthquake loads, so that the equipment in the reactor can still operate reliably under earthquake loads. Summary of the invention

[0003] In view of the above problems, the present invention is proposed to provide a support structure for a reactor that overcomes the above problems or at least partially solves the above problems.

[0004] A first aspect of an embodiment of the present invention provides a support structure for a reactor, wherein the reactor includes an equipment support, wherein the equipment support is used to support equipment in the reactor, and wherein the support structure includes: a support portion, wherein the support portion is used to support the equipment support; a fixing portion, wherein the fixing portion is arranged on the support portion, and the equipment support is fixed to the fixing portion; wherein the fixing portion is provided with a reinforcement portion, wherein the reinforcement portion includes: an annular member, wherein the annular member is arranged on the fixing portion; and at least one fixed reinforcement member, wherein the fixed reinforcement member is arranged along the circumference of the annular member to improve the strength of the support structure.

[0005] The second aspect of the embodiment of the present invention provides a reactor, comprising: the support structure provided by the first aspect of the embodiment of the present invention; a power pump support, the power pump support is fixed to the fixed part; or, a heat exchanger support, the heat exchanger support is fixed to the fixed part. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Other objects and advantages of the present invention will become apparent from the following description of the present invention with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present invention.

[0007] Figure 1 is a schematic structural diagram of a support structure for a reactor provided according to one embodiment of the present invention;

[0008] Figure 2 is based on Figure 1 A partial schematic structural diagram of a support structure for a reactor is provided;

[0009] Figure 3It is a schematic diagram of a use state of a supporting structure for a reactor provided according to an embodiment of the present invention.

[0010] In the accompanying drawings, 10 is a supporting portion, 11 is a first cylinder, 12 is a second cylinder, 13 is a supporting reinforcement member, 14 is a partition member, 15 is a cushion block, 20 is a fixing portion, 30 is a reinforcement portion, 31 is an annular member, 32 is a fixing reinforcement member, 40 is a grid header, 50 is a power pump support, 60 is an intermediate heat exchanger support, 70 is a core, and 80 is an in-core shield.

[0011] It should be noted that the drawings are not drawn to scale, and for illustrative purposes, elements of similar structure or function are generally represented by similar reference numerals throughout the drawings. It should also be noted that the drawings are only for the convenience of describing the preferred embodiments, not the invention itself. The drawings do not illustrate every aspect of the described embodiments and do not limit the scope of the invention. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiment is one embodiment of the present invention, not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0013] Unless otherwise defined, technical or scientific terms used in the present invention shall have the common meanings understood by one having ordinary skills in the field to which the present invention belongs.

[0014] Since my country is a country prone to earthquakes, especially since the China Demonstration Fast Reactor is located at a location with an earthquake intensity of 9, it is necessary to ensure the safety of the nuclear reactor under earthquakes. The supporting structure in the reactor plays the role of supporting the internal components, equipment and equipment supports in the reactor. Therefore, it is necessary to increase the supporting strength of the supporting structure so that the supporting structure can reliably support the internal components, equipment and equipment supports in the reactor under earthquake loads, so that the equipment in the reactor can operate reliably under earthquake loads, thereby ensuring the safe operation or safe shutdown of the reactor.

[0015] One embodiment of the present invention provides a support structure for a reactor, wherein the reactor includes an equipment support, and the equipment support is used to support equipment in the reactor, for example, the equipment support is used to support a power pump, a heat exchanger and other equipment in the reactor.

[0016] Figure 1 is a schematic structural diagram of a support structure for a reactor provided according to an embodiment of the present invention, Figure 2is based on Figure 1 A partial schematic structural diagram of a support structure for a reactor is provided, see Figure 1 and Figure 2 , the supporting structure comprises:

[0017] The support part 10 is used to support the equipment support. For example, the support part 10 can be used to support the power pump support 50, and can also be used to support the heat exchanger support;

[0018] The fixing part 20 is arranged on the supporting part 10, and the equipment support is fixed to the fixing part 20. In some embodiments, the equipment support can be welded to the fixing part 20. Specifically, the fixing part 20 can be a supporting plate, and the equipment support can be welded to the supporting plate. The fixing part 20 can be arranged on the top of the supporting part 10 or in the middle of the supporting part 10. In other embodiments, the equipment support can also be fixed to the fixing part 20 by other fixing methods;

[0019] The fixing part 20 is provided with a reinforcing part 30 for improving the local strength and bending strength of the fixing part 20 of the supporting structure, so that the supporting structure can reliably support the equipment. The reinforcing part 30 includes:

[0020] The annular member 31 is disposed on the fixing portion 20 to increase the strength and rigidity of the fixing portion 20, thereby improving the strength of the support structure. In some embodiments, the annular member 31 may be a reinforcing ring, and the annular member 31 may be disposed on the inner side of the fixing portion 20 or on the outer side of the fixing portion 20. Optionally, the fixing portion 20 may be a cylinder. In other embodiments, the annular member 31 may also be disposed on the support portion 10; in other embodiments, the annular member 31 may also be configured to be cylindrical.

[0021] At least one fixing reinforcement member 32 is arranged along the circumference of the annular member 31 to improve the strength of the support structure. Optionally, the fixing reinforcement member 32 can be a rib plate to improve the strength of the fixing portion 20, thereby improving the strength of the support structure.

[0022] It can be understood that the equipment support in the reactor can be fixed to the fixing part 20. In some embodiments, the equipment support can be arranged inside the fixing part 20, for example, the fixing part 20 can be arranged as a cylinder, and the equipment support is arranged inside the cylinder. In other embodiments, the equipment support in the reactor can also be directly fixed to the fixing part 20, for example, the equipment support can be fixed to the surface of the fixing part 20. Since the fixing part 20 plays the role of fixing the equipment support, the annular member 31 and the fixing reinforcement member 32 are arranged at the fixing part 20, which is equivalent to arranging the annular member 31 and the fixing reinforcement member 32 under the equipment support, thereby enhancing the support strength and support stiffness under the equipment support, which helps the equipment support to support the equipment support more reliably.

[0023] In some embodiments, the fixing reinforcement member 32 may be disposed on a side of the annular member 31 close to the fixing portion 20, or may be disposed on a side of the annular member 31 away from the fixing portion 20. In other embodiments, the fixing reinforcement member 32 may also be directly disposed on the fixing portion 20. For example, the fixing portion 20 may be a cylinder, and the fixing reinforcement member 32 may be uniformly disposed along the circumference of the fixing portion 20. Optionally, the fixing reinforcement member 32 may also be disposed along the axial direction of the fixing portion 20.

[0024] In some embodiments, the reinforcement portion 30 may include a plurality of fixed reinforcement members 32 , and the fixed reinforcement members 32 are evenly arranged along the circumference of the annular member 31 . For example, the fixed reinforcement members 32 may be radially arranged along the annular member 31 .

[0025] In some embodiments, the support portion 10 includes:

[0026] A first cylinder 11;

[0027] The second cylinder 12 is disposed outside the first cylinder 11 , and the fixing portion 20 is disposed between the first cylinder 11 and the second cylinder 12 .

[0028] At least one fixing reinforcement member 32 is connected to the second cylinder 12. In the support structure, the strength margin of the second cylinder 12 is relatively large, and the fixing reinforcement member 32 is extended and connected to the second cylinder 12 to improve the local strength of the support structure. In some embodiments, the fixing reinforcement member 32 can be welded to the second cylinder 12.

[0029] Optionally, the fixing portion 20 at the position of the equipment support bearing the heaviest weight may extend the fixing reinforcement 32 to connect to the second cylinder 12 to improve the local strength of the support structure so that the support structure can reliably support the equipment support with a heavier weight.

[0030] At least one support reinforcement 13 is provided in the inner circumference of the second cylinder 12 to improve the support strength of the support structure. Optionally, the support reinforcement 13 can be a rib. In some embodiments, the support reinforcement 13 can be fixed to the second cylinder 12 to strengthen the support strength of the second cylinder 12. In other embodiments, the support reinforcement 13 can also be fixed to the first cylinder 11 to strengthen the support strength of the first cylinder 11.

[0031] In an embodiment of the present invention, the support reinforcement members 13 are evenly arranged along the circumference of the second cylinder 12. For example, the support reinforcement members 13 can be arranged along the second cylinder 12 in a radial shape.

[0032] In some embodiments, an elastic member (not shown in the figure) may be provided between the first cylinder 11 and the second cylinder 12 to restrain the shaking of the support portion 10 under seismic loads, thereby improving the supporting strength of the supporting structure under seismic loads.

[0033] In the embodiment of the present invention, specifically, the fixing portion 20 can be arranged between the first cylinder 11 and the second cylinder 12, and is used to fix the equipment support, and a support reinforcement 13 is provided below the fixing portion 20. A grid header 40 can be provided in the first cylinder 11, and the grid header 40 can be used to support the core 70 and reasonably distribute the coolant flow for the internal components in the reactor. Optionally, a core shroud (not shown in the figure) can be provided in the first cylinder 11, and the core shroud is used to constrain the head of the core assembly, define the outer contour of the core 70, and provide a natural circulation cooling channel when an accident occurs in the reactor.

[0034] In the embodiment of the present invention, the support portion 10 may be provided with a connecting portion (not shown in the figure) for connecting the coolant in the reactor. For example, the connecting portion may be provided in the first cylinder 11 or in the second cylinder 12.

[0035] In some embodiments, the support portion 10 may also be configured as a cylinder, and at least one fixed reinforcement member 32 is connected to the support portion 10. Specifically, since the cylinder strength margin of the support portion 10 is relatively large, the fixed reinforcement member 32 may be extended to be connected to the cylinder to improve the local strength of the support structure. In some embodiments, the fixed reinforcement member 32 may be welded to the support portion 10.

[0036] Optionally, at the fixing portion 20 at the position of the equipment support bearing the heaviest weight, the fixing reinforcement 32 can be extended to connect to the cylinder to improve the local strength of the support structure so that the support structure can reliably support the equipment support with a heavier weight.

[0037] In some embodiments, at least one supporting reinforcement member 13 is circumferentially disposed on the supporting portion 10 to improve the strength of the supporting portion 10 .

[0038] Optionally, the support portion 10 may be provided with a plurality of support reinforcements 13 circumferentially, and the support reinforcements 13 are evenly arranged circumferentially along the support portion 10. For example, the support reinforcements 13 may be radially arranged circumferentially along the support portion 10, specifically, the support reinforcements 13 may be radially arranged circumferentially along the cylinder.

[0039] In the embodiment of the present invention, the support part 10 is provided with a partition 14, which can improve the strength of the support structure. The partition 14 is also used to partition the support part 10 into two closed chambers, separating the coolant in the closed chamber above the partition 14 from the coolant in the closed chamber below the partition 14. The coolant circulates in the closed chamber above the partition 14, and the coolant in the closed chamber below the partition 14 does not circulate. The partition 14 cooperates with the first cylinder 11 to form a cooling loop from the primary power pump of the reactor to the intermediate heat exchanger. Figure 3 is a schematic diagram of a use state of a support structure for a reactor provided according to an embodiment of the present invention, see Figure 3 A fixing portion 20 is provided between the first cylinder 11 and the second cylinder 12, and the power pump support 50 and the intermediate heat exchanger support 60 are respectively fixed to the fixing portion 20, and a cooling loop from the power pump support 50 to the intermediate heat exchanger support 60 is formed in the support portion 10 of the support structure.

[0040] See also Figure 3 Specifically, the partition 14 divides the support part 10 into two closed cavities, one above the other. It can be understood that the coolant in the closed cavity in the middle and upper part of the support part 10 is a hot coolant with heat after cooling the core 70, and the coolant in the closed cavity in the middle and lower part of the support part 10 is a coolant without heat. Optionally, in a sodium-cooled fast reactor, the coolant is liquid metal sodium, the closed cavity in the middle and upper part of the support part 10 is hot sodium, and the closed cavity in the middle and lower part of the support part 10 is cold sodium.

[0041] See also Figure 3 In the direction of the arrow in the figure, the power pump draws sodium from the cold sodium closed chamber in the lower part, and after being pressurized by the impeller, it is sent to the grid header 40 through the outlet pipe. The cold sodium enters the core assembly from the grid header 40 to cool the core 70, and then enters the hot sodium closed chamber in the upper part, and then enters the intermediate heat exchanger support 60 along the direction of the arrow, thereby entering the intermediate heat exchanger.

[0042] Optionally, an in-core shield 80 is provided in the first cylinder 11 to ensure that the neutron flux received by the reactor vessel is within an allowable range.

[0043] Optionally, the partition member 14 may be provided with a connecting portion for connecting with a pressure pipe connected to the power pump.

[0044] In an embodiment of the present invention, the partition member 14 can be welded to the support portion 10, specifically, the partition member 14 can be welded to the second cylinder 12. Optionally, the partition member 14 is concentrically arranged with the support portion 10, specifically, the partition member 14 can be concentrically arranged with the second cylinder 12, and the partition member 14 can be a horizontal steel plate.

[0045] In an embodiment of the present invention, the partition 14 may be provided with an in-pile shield 80, which is used to keep the neutron injection received by the reactor vessel within an allowable range. Optionally, the in-pile shield 80 may be disposed below the partition 14. In other embodiments, the in-pile shield 80 may also be disposed on the grid header 40.

[0046] In an embodiment of the present invention, the partition member 14 and the support portion 10 form a box-type structure. Specifically, the partition member 14 may be a horizontal steel plate, and the support portion 10 may be a cylinder. The horizontal steel plate and the cylinder are concentrically arranged, and the horizontal steel plate and the cylinder are welded to form a box-type structure, so as to improve the overall strength of the support structure.

[0047] In the embodiment of the present invention, the support portion 10 is provided with a spacer 15 for supporting the grid header 40, and the grid header 40 is provided in the reactor.

[0048] Optionally, the equipment support includes a power pump support 50 and a heat exchanger support. For example, the equipment support may be an intermediate heat exchanger support 60 or an independent heat exchanger support.

[0049] An embodiment of the present invention provides a reactor, comprising:

[0050] The supporting structure provided by the embodiment of the present invention;

[0051] A power pump support 50, the power pump support 50 is fixed to the fixing portion 20;

[0052] Alternatively, the heat exchanger support is fixed to the fixing portion 20 .

[0053] In an embodiment of the present invention, the reactor further comprises: a grid header 40 , and the spacer 15 supports the grid header 40 .

[0054] The supporting structure for a reactor provided by an embodiment of the present invention improves the overall strength of the supporting structure by forming a box-type structure between the supporting portion 10 and the partition member 14, and improves the local bending strength of the supporting structure by providing a reinforcing portion 30 at the fixing portion 20, and further extends the fixing reinforcement member 32 to be connected to the supporting portion 10, thereby improving the local strength of the fixing portion 20 of the supporting structure. The overall and local aspects are combined to further improve the strength and rigidity of the supporting structure, so that the supporting structure can reliably support the in-core components, equipment and equipment supports in the reactor under seismic loads.

[0055] Regarding the embodiments of the present invention, it should also be noted that, in the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0056] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A support structure for a reactor, the reactor comprising an equipment support, the equipment support being used to support equipment in the reactor, characterized in that: The support structure comprises: A support portion (10), the support portion (10) being used to support the device support; A fixing portion (20), the fixing portion (20) being arranged on the supporting portion (10), and the device support being fixed on the fixing portion (20); Wherein, the fixing portion (20) is provided with a reinforcing portion (30), and the reinforcing portion (30) comprises: an annular member (31), the annular member (31) being arranged on the fixing portion (20); at least one fixed reinforcement member (32), the fixed reinforcement member (32) being arranged along the circumference of the annular member (31) and being used to improve the strength of the support structure; The support portion (10) comprises: A first cylinder (11); a second cylinder (12), wherein the second cylinder (12) is arranged outside the first cylinder (11), and the fixing portion (20) is arranged between the first cylinder (11) and the second cylinder (12); The support portion (10) is circumferentially provided with at least one support reinforcement member (13); The support reinforcement members (13) are evenly arranged along the circumference of the support portion (10); The support reinforcement members (13) are evenly arranged along the circumference of the second cylinder (12); The support portion (10) is provided with a partition piece (14), and the partition piece (14) is used to partition the support portion (10) into two closed cavities; The partition member (14) and the support portion (10) form a box-type structure; The partition member (14) is arranged concentrically with the support portion (10) to form the box-type structure.

2. The support structure according to claim 1, characterized in that The fixing reinforcement members (32) are evenly arranged along the circumference of the annular member (31).

3. The support structure according to claim 1, characterized in that At least one of the fixing reinforcement members (32) is connected to the second cylinder (12).

4. The support structure according to claim 1, characterized in that At least one supporting reinforcement member (13) is arranged in the inner circumference of the second cylinder (12).

5. The support structure according to claim 1, characterized in that At least one of the fixing reinforcement members (32) is connected to the supporting portion (10).

6. The support structure according to claim 1, characterized in that The support portion (10) is provided with a cushion block (15) for supporting a grid header, and the grid header is arranged in the reactor.

7. The support structure according to claim 1, characterized in that The equipment support includes a power pump support and a heat exchanger support.

8. A reactor, characterized in that: include: The support structure according to any one of claims 1 to 7; A power pump support, the power pump support being fixed to the fixing portion (20); Alternatively, a heat exchanger support is fixed to the fixing portion (20).

9. The reactor according to claim 8, characterized in that Also includes: A spacer block and a grid header, wherein the spacer block supports the grid header.

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