Nuclear power plant forebay front cold source safe water taking structure

Abstract

The utility model discloses a nuclear power plant forebay front cold source safe water taking structure which comprises a supporting seat, a front water taking culvert body, an intercepting net, a front water flow driving pump and a forebay connecting culvert. A first flow guide plate and a second flow guide plate are arranged in an inner cavity of the front water intake culvert body, the intercepting net is connected with the first flow guide plate and the second flow guide plate, and the intercepting net defines a first space and a second space in the inner cavity of the front water intake culvert body; the front water flow driving pump is connected with the water outlet and communicated with the second space, and the forebay connecting culvert is used for connecting the first space with the forebay of the nuclear power plant. By applying the forebay front cold source safe water taking structure of the nuclear power plant, a plurality of interception nets with different pore sizes do not need to be arranged in the breakwater, and the structure is simple. The forebay front cold source safe water taking structure of the nuclear power plant can realize forebay front cold source water taking and marine organism removal of the nuclear power plant, and ensures the operation safety of a nuclear power unit.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a safe water intake structure for a cold source in front of a forebay of a nuclear power plant. Background Art

[0002] The common structures for cold water intake and marine growth removal in front of the forepool of a nuclear power plant are, from outside to inside, in the direction of water flow: a gate net connected to the breakwater of the nuclear power plant, one or several pollution nets of different sizes and with the net surface basically perpendicular to the direction of water flow, or a mechanized cleaning platform (including nets).

[0003] The above existing water intake structure has the following disadvantages:

[0004] (1) There are many types of nets. Nuclear power plants need to prepare a variety of nets with different diameters and sizes, and the procurement and inventory process is cumbersome. (2) The cost of personnel and materials for cleaning marine organisms is high. Nuclear power plants need to invest a lot of manpower (divers going into the water, driving boats to manually clean nets, etc.) and materials (boats, nets, etc.) to continuously clean marine organisms. Nets are generally made of soft materials, which are easy to break and need to be replaced frequently. (3) The risk of cooling source failure is high. If marine organisms are not cleaned in time, they will enter the power plant and gather in the drum net, which will cause the cooling source to fail, resulting in power reduction or machine or reactor tripping. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a safe water intake structure for a cold source in front of a forebay of a nuclear power plant.

[0006] The technical solution adopted by the utility model to solve its technical problems is: constructing a safe water intake structure for a cold source in front of a forepool of a nuclear power plant, comprising a support seat, a front water intake culvert body, an interception net, a front water flow driving pump and a forepool connecting culvert, wherein the front water intake culvert body is arranged on the support seat, the front water intake culvert body is a hollow columnar structure, the axial first end of the front water intake culvert body is a water inlet, the axial second end of the front water intake culvert body is a water outlet, the inner cavity of the front water intake culvert body is provided with a first guide plate near the water inlet, the inner cavity of the front water intake culvert body is provided with a second guide plate near the water outlet, the interception net connects the first guide plate and the second guide plate, and the interception net defines a first space and a second space in the inner cavity of the front water intake culvert body, the first space is formed above the interception net, and the second space is formed below the interception net;

[0007] The front water flow driving pump is connected to the water outlet and communicates with the second space. There are multiple forebay connecting culverts, and the multiple forebay connecting culverts are used to connect the first space and the forebay of the nuclear power plant.

[0008] In some embodiments, the interception net is a metal interception net.

[0009] In some embodiments, the mesh size of the interception net is less than 3 mm.

[0010] In some embodiments, the front pool connecting culvert is vertically connected to the front water intake culvert body.

[0011] In some embodiments, the number of the forebay connecting culverts is four.

[0012] In some embodiments, an inspection well is provided on the front water intake culvert body.

[0013] In some embodiments, a metal isolation net is provided at the outlet end of the fore pool connected to the culvert.

[0014] In some embodiments, the nuclear power plant front pool front cold source safety water intake structure also includes a breakwater, the front water intake culvert body is located on the inner side of the breakwater, and the axial second end of the front water intake culvert body protrudes from the side of the breakwater, and the front water flow drive pump is located on the outer side of the breakwater.

[0015] In some embodiments, the water inlet gate of the breakwater is provided with a metal gate net.

[0016] In some embodiments, the mesh size of the metal portal mesh is less than 3 mm.

[0017] The implementation of this utility model has the following beneficial effects: The use of this nuclear power plant forebay cold source safe water intake structure eliminates the need for multiple interception nets of varying apertures within the breakwater, resulting in a relatively simple structure. This nuclear power plant forebay cold source safe water intake structure can achieve cold source water intake and marine growth removal at the forebay, ensuring the safe operation of nuclear power units. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can derive other relevant drawings based on these drawings without inventive effort. In the drawings:

[0019] Figure 1 This is a schematic structural diagram of a safe water intake structure for a cold source in front of a nuclear power plant forebay in some embodiments of the present invention;

[0020] Figure 2 It is a partial structural schematic diagram of a safe water intake structure for a cold source in front of a nuclear power plant forebay in some embodiments of the present invention. DETAILED DESCRIPTION

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. They are only for the convenience of describing the present technical solution and do not indicate that the devices or components referred to must have specific directions. Therefore, they should not be understood as limiting the present invention.

[0022] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", "fixed", and "set" should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected or electrically connected; they can be directly connected or indirectly connected through an intermediate medium, and they can be internal connections between two elements or interactions between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", and "third" are only used to facilitate the description of the present technical solution and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", and "third" can explicitly or implicitly include one or more of these features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration, not limitation, to facilitate a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present invention with unnecessary detail.

[0024] See Figure 1 and Figure 2 The utility model shows a safe water intake structure for the cold source in front of the forepool of a nuclear power plant, which can cooperate with the cold source system equipment at the rear end of the forepool of the nuclear power plant to realize safe water intake for the cold source.

[0025] The safety water intake structure for the cold source in the forepool of a nuclear power plant comprises a support base 10, a front water intake culvert body 20, an interception net 30, a front water flow driving pump 40 and a front pool connecting culvert 50. The front water intake culvert body 20 is arranged on the support base 10. The front water intake culvert body 20 is a hollow columnar structure. The axial first end of the front water intake culvert body 20 is a water inlet, and the axial second end of the front water intake culvert body 20 is a water outlet. The inner cavity of the front water intake culvert body 20 is provided with a first A guide plate 21 is provided in the inner cavity of the pre-intake culvert body 20, and a second guide plate 22 is provided near the water outlet. The interception net 30 connects the first guide plate 21 and the second guide plate 22, and extends axially along the inner cavity of the pre-intake culvert body 20. The interception net 30 defines a first space 20A and a second space 20B in the inner cavity of the pre-intake culvert body 20. The first space 20A is formed above the interception net 30, and the second space 20B is formed below the interception net 30. In some embodiments, the first guide plate 21 can also be defined as a first mounting plate, and the second guide plate 22 can also be defined as a second mounting plate.

[0026] The front water flow driving pump 40 is connected to the water outlet and communicates with the second space 20B. There are multiple forebay connecting culverts 50, and the multiple forebay connecting culverts 50 are used to connect the first space 20A and the forebay 80 of the nuclear power plant.

[0027] In some embodiments, the lower surface of the support base 10 may be a planar structure, and the support base 10 may be made of concrete.

[0028] In some embodiments, the front water intake culvert body 20 and the forebay connecting culvert 50 may be constructed of concrete. Preferably, the inner walls of the front water intake culvert body 20 and the forebay connecting culvert 50 are clad with smooth steel. The first guide plate 21 and the second guide plate 22 may be structures of the front water intake culvert body 20 and may be constructed of concrete or installed within the interior of the front water intake culvert body 20 using metal plates, such as stainless steel plates, without specific limitation herein.

[0029] In some embodiments, the interception net 30 is a metal interception net, which may include but is not limited to a copper alloy net or a high-strength zinc-aluminum alloy net. The metal interception net has good durability. Preferably, the mesh size of the interception net 30 is less than 3 mm.

[0030] In some embodiments, the forebay connecting culvert 50 is a hollow cylindrical structure, and the forebay connecting culvert 50 is vertically connected to the front water intake culvert body 20 .

[0031] In some embodiments, the number of the forebay connecting culverts 50 is four. Of course, the number of the forebay connecting culverts 50 can be selected and set according to actual needs and is not specifically limited here.

[0032] In some embodiments, an inspection well 60 is provided on the front water intake culvert body 20 .

[0033] In some embodiments, a metal screen is provided at the outlet of the forebay connecting to the culvert 50. The metal screen may include, but is not limited to, a copper alloy screen or a high-strength zinc-aluminum alloy screen. The metal screen is durable. Preferably, the mesh size of the metal screen is less than 3 mm. Of course, the metal screen may not be provided, and this is not a specific limitation.

[0034] In some embodiments, the nuclear power plant front pool front cold source safety water intake structure also includes a breakwater 70, the front water intake culvert body 20 is located on the inner side of the breakwater 70, and the axial second end of the front water intake culvert body 20 protrudes from the side of the breakwater 70, and the front water flow drive pump 40 is located on the outer side of the breakwater 70.

[0035] In some embodiments, the inlet gate of the breakwater 70 is provided with a metal gate mesh 71. The metal gate mesh 71 may include, but is not limited to, a copper alloy mesh or a high-strength zinc-aluminum alloy mesh. Metal isolation meshes offer excellent durability. Preferably, the mesh size of the metal gate mesh 71 is less than 3 mm.

[0036] In some embodiments, the front water flow drive pump 40 can be an isolation pump or the like.

[0037] Combine Figure 1 and Figure 2 As shown, the application of the safe water intake structure for the front cold source of the fore pool of the nuclear power plant is as follows: (1) Seawater flows through the metal mouth gate net 71 into the breakwater 70, and larger marine organisms are isolated outside the breakwater 70 by the metal mouth gate net 71. The seawater in the breakwater 70 flows into the inner cavity of the front water intake culvert body 20 through the water inlet, and the seawater flows downstream in two parts (the arrow marked a is the direction of seawater flow). One part of the seawater flows under the interception net 30 under the suction action of the front water flow drive pump 40 until it flows into the front water flow drive pump 40, and is then discharged outside the breakwater 70 by the front water flow drive pump 40. The other part of the seawater passes through the interception net 30 under the suction action of the cold source system equipment inside the power plant, flows into the fore pool connecting culvert 50, and reaches the front pool 80 of the nuclear power plant, and is subsequently used internally by the nuclear power plant.

[0038] After the smaller marine organisms enter the front water intake culvert body 20 with the water flow, most of them enter the lower part of the interception net 30. Under the action of their own gravity, the interception net 30 and the lateral water flow, they are pumped out of the breakwater 70 by the front water flow driven pump 40. A very small number of marine organisms pass through the interception net 30 upwards, enter the nuclear power plant front pool 80, reach the nuclear power plant drum net, pass through the drum net, and are finally discharged by the power plant cold source drainage.

[0039] Understandably, this safe water intake structure for the cold source in front of the nuclear power plant forebay can achieve cold source water intake and marine growth removal in front of the nuclear power plant forebay 80 (the water collection pool in front of the pump station), ensuring the safe operation of nuclear power units. This structure can be used for cold source water intake in nuclear power plants and can also remove most marine growth in the cold source (seawater) of nuclear power plants in a non-interceptive manner before it enters the relevant cold source system equipment of the nuclear power plant.

[0040] The application of this nuclear power plant forepool front cold source safe water intake structure has the following beneficial effects:

[0041] (1) There is no need to arrange multiple interception nets with different apertures in the breakwater 70, and the structure is relatively simple.

[0042] (2) The movement direction of most marine organisms in the front water intake culvert body 20 is not perpendicular to the plane of the interception net 30, and they are not easy to gather. They can be directly pumped out of the breakwater 70. The amount of marine organisms that pass through the interception net 30 upwards is greatly reduced, and they are not easy to gather in the drum net. In theory, the size of these marine organisms can pass through the drum net (the mesh size of the drum net of a nuclear power plant is generally 3mm. The power plant can choose the mesh size of the interception net 30 according to the marine organism situation in its own sea area, for example, the mesh size of the interception net 30 is less than 3mm). In summary, this structure can greatly reduce the risk of the cold source failing due to the accumulation of marine organisms.

[0043] (3) The interception net 30 can be made of metal, which is not easy to be damaged, has lower maintenance costs, and greatly reduces the investment in manpower and materials.

[0044] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. A safe water intake structure for the cold source in front of the forebay of a nuclear power plant, characterized in that: The invention comprises a support seat (10), a front water intake culvert body (20), an interception net (30), a front water flow driving pump (40) and a front pool connecting culvert (50), wherein the front water intake culvert body (20) is arranged on the support seat (10), the front water intake culvert body (20) is a hollow columnar structure, the axial first end of the front water intake culvert body (20) is a water inlet, the axial second end of the front water intake culvert body (20) is a water outlet, and the inner cavity of the front water intake culvert body (20) is provided with a first water inlet near the water inlet. a guide plate (21); a second guide plate (22) is provided in the inner cavity of the front water intake culvert body (20) near the water outlet; the interception net (30) connects the first guide plate (21) and the second guide plate (22); the interception net (30) defines a first space (20A) and a second space (20B) in the inner cavity of the front water intake culvert body (20); the first space (20A) is formed above the interception net (30), and the second space (20B) is formed below the interception net (30); The front water flow driving pump (40) is connected to the water outlet and communicates with the second space (20B). The number of the forebay connecting culverts (50) is multiple, and the multiple forebay connecting culverts (50) are used to connect the first space (20A) and the forebay of the nuclear power plant.

2. The safe water intake structure for the cold source in front of the forebay of a nuclear power plant according to claim 1 is characterized in that: The interception net (30) is a metal interception net.

3. The safe water intake structure for the cold source in front of the forebay of a nuclear power plant according to claim 1, characterized in that: The mesh size of the intercepting net (30) is less than 3 mm.

4. The safe water intake structure for the cold source in front of the forebay of a nuclear power plant according to claim 1, characterized in that: The front pool connecting culvert (50) is vertically connected to the front water intake culvert body (20).

5. The safe water intake structure for the cold source in front of the forebay of a nuclear power plant according to claim 1, characterized in that: The number of the forebay connecting culverts (50) is four.

6. The safe water intake structure for the cold source in front of the forebay of a nuclear power plant according to claim 1, characterized in that: A maintenance well (60) is provided on the front water intake culvert body (20).

7. The safe water intake structure for the cold source in front of the forebay of a nuclear power plant according to claim 1, characterized in that: The outlet end of the forebay connected to the culvert (50) is provided with a metal isolation net.

8. The safe water intake structure for the cold source in front of the forebay of a nuclear power plant according to claim 1, characterized in that: The nuclear power plant front pool front cold source safe water intake structure also includes a breakwater (70), the front water intake culvert body (20) is located on the inner side of the breakwater (70), and the axial second end of the front water intake culvert body (20) protrudes from the side of the breakwater (70), and the front water flow drive pump (40) is located on the outer side of the breakwater (70).

9. The safe water intake structure for the cold source in front of the forebay of a nuclear power plant according to claim 8, characterized in that: The water inlet gate of the breakwater (70) is provided with a metal gate net (71).

10. The safe water intake structure for the cold source in front of the forebay of a nuclear power plant according to claim 9, characterized in that: The mesh size of the metal door net (71) is less than 3 mm.

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