CN109281370B - Drainage system of nuclear power - Google Patents
Drainage system of nuclear power Download PDFInfo
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- CN109281370B CN109281370B CN201811168538.8A CN201811168538A CN109281370B CN 109281370 B CN109281370 B CN 109281370B CN 201811168538 A CN201811168538 A CN 201811168538A CN 109281370 B CN109281370 B CN 109281370B
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F1/00—Methods, systems, or installations for draining-off sewage or storm water
- E03F1/001—Methods, systems, or installations for draining-off sewage or storm water into a body of water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/02—Shut-off devices
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Abstract
The invention discloses a nuclear power drainage system which comprises a small pile drainage device and a large pile drainage device, wherein the small pile drainage device comprises a small pile land area drainage tunnel, the large pile drainage device comprises a large pile sea area drainage tunnel, an outlet of the small pile land area drainage tunnel is connected with the large pile sea area drainage tunnel, and drainage in the small pile drainage device is discharged to the open sea through the outlet of the large pile sea area drainage tunnel. The drainage in the small pile drainage device is discharged to the open sea through the outlet of the large pile sea area drainage tunnel, the small pile drainage device and the large pile drainage device share the large pile sea area drainage tunnel for drainage, and the small pile sea area drainage tunnel which is designed for the small pile drainage device independently and has higher manufacturing cost is omitted for drainage, so that the construction cost of a nuclear power drainage system is reduced, and the economical efficiency of engineering construction is facilitated.
Description
Technical Field
The invention belongs to the technical field of nuclear power, and particularly relates to a nuclear power drainage system.
Background
The small reactor is a small-power nuclear reactor type, and a small reactor drainage system is a relatively independent single project for draining circulating water, service water and the like. Generally, a nuclear power plant drainage system discharges water in a siphon well to a drainage gate shaft building through a land drainage tunnel and then to the open sea through a sea drainage tunnel.
The independent drainage system is designed for the small piles independently, and a single land drainage tunnel is arranged according to one pile, and the independent drainage system designed for the small piles independently needs to construct drainage structures with higher construction cost, such as sea drainage tunnels, so that the construction cost of the whole small piles is improved, and the economy of engineering construction is not facilitated.
Disclosure of Invention
The invention aims to solve the technical problem of providing a nuclear power drainage system, wherein a small pile drainage device and a large pile drainage device share a large pile sea area drainage tunnel for drainage, so that the small pile sea area drainage tunnel which is designed for the small pile drainage device independently and has higher manufacturing cost is omitted for drainage, and the cost is reduced.
The technical scheme adopted for solving the technical problem is to provide a nuclear power drainage system which comprises a small pile drainage device for small pile drainage and a large pile drainage device for large pile drainage, wherein the small pile drainage device comprises a small pile land area drainage tunnel, the large pile drainage device comprises a large pile sea area drainage tunnel, an outlet of the small pile land area drainage tunnel is connected with the large pile sea area drainage tunnel, and drainage in the small pile drainage device is discharged to the open sea through the outlet of the large pile sea area drainage tunnel.
Preferably, the large-pile drainage device comprises a large-pile drainage gate well, an outlet of the large-pile drainage gate well is connected with an inlet of the large-pile sea drainage tunnel, and an outlet of the small-pile land drainage tunnel is connected with an inlet of the large-pile drainage gate well.
Preferably, the large-pile drainage device further comprises a large-pile drainage gate well factory building arranged on the large-pile land drainage tunnel, the large-pile drainage gate well is arranged in the large-pile drainage gate well factory building, and the large-pile drainage gate well factory building is used for overhauling the large-pile land drainage tunnel.
Preferably, the large-pile drainage device further comprises a large-pile siphon well and a large-pile land area drainage tunnel, an outlet of the large-pile siphon well is connected with an inlet of the large-pile land area drainage tunnel, and an outlet of the large-pile land area drainage tunnel is connected with an inlet of the large-pile drainage gate well.
Preferably, there are at least two of the small stack drainage devices.
Preferably, the large-pile drainage device is at least two, the small-pile drainage device comprises a small-pile drainage gate well arranged on the small-pile land drainage tunnel, the small-pile drainage gate well comprises a small-pile drainage gate inlet and a small-pile drainage gate outlet positioned at the downstream of the small-pile drainage gate inlet, each small-pile drainage gate well is at least connected with another small-pile drainage gate well to form a small-pile drainage gate group, all small-pile drainage gate inlets in the small-pile drainage gate group are communicated with all small-pile drainage gate outlets, and the outlet of each small-pile land drainage tunnel is connected with different large-pile drainage gate wells.
Preferably, the number of the large pile drainage devices is not less than that of the small pile drainage devices.
Preferably, the small heap drainage device further comprises a small heap drainage gate well factory building arranged on the small heap land area drainage tunnel, the small heap drainage gate well is arranged in the small heap drainage gate well factory building, and the small heap drainage gate well factory building is used for overhauling the small heap land area drainage tunnel.
Preferably, when one of the large pile units is overhauled, the large pile drainage gate well corresponding to the overhauled large pile unit is closed, the other large pile drainage gate wells are opened, the small pile drainage gate outlet of the small pile drainage gate well on the small pile land area drainage tunnel connected with the large pile drainage gate well corresponding to the overhauled large pile unit is closed,
the drainage in the small-pile land area drainage tunnel connected with the large-pile drainage gate well corresponding to the overhauled large-pile unit firstly enters the small-pile drainage gate inlet of the small-pile drainage gate well on the small-pile land area drainage tunnel, then enters the small-pile drainage gate group where the small-pile drainage gate inlet is positioned, is discharged through the small-pile drainage gate outlet of the small-pile drainage gate well on other small-pile land area drainage tunnels of the small-pile drainage gate group, enters the outlet of the small-pile land area drainage tunnel corresponding to the small-pile drainage gate outlet, enters the large-pile drainage gate well connected with the outlet of the small-pile land area drainage tunnel, and is discharged through the outlet of the large-pile sea area drainage tunnel where the large-pile drainage gate well is positioned.
Preferably, the heap drainage device further comprises a heap siphon well, and an outlet of the heap siphon well is connected with an inlet of the heap land drainage tunnel.
Preferably, the number of the small pile drainage devices is 2, and the number of the large pile drainage devices is 2.
Preferably, at least two heap drains are connected to the drain of a heap unit.
Preferably, the water discharged from the small pile water discharging device is small pile circulating water and/or small pile factory water, and the water discharged from the large pile water discharging device is large pile circulating water and/or large pile factory water.
Preferably, the small heap plant site is adjacent to the large heap plant site.
The drainage in the small pile drainage device is discharged to the open sea through the outlet of the large pile sea area drainage tunnel, the small pile drainage device and the large pile drainage device share the large pile sea area drainage tunnel for drainage, and the small pile sea area drainage tunnel which is designed for the small pile drainage device independently and has higher manufacturing cost is omitted for drainage, so that the construction cost of a nuclear power drainage system is reduced, and the economical efficiency of engineering construction is facilitated.
Drawings
FIG. 1 is a schematic structural diagram of a nuclear power drainage system in an embodiment of the present invention.
In the figure: 1-a first bulk siphon well; 2-a first large-pile land drainage tunnel; 3-a first large stack drainage gate well; 4-a first large-pile sea area drainage tunnel; 5-a second bulk siphon well; 6-a second large-pile land drainage tunnel; 7-a second large stack drainage sluice well; 8-a second large-pile sea area drainage tunnel; 9-a first small stack of siphon wells; 10-a first section of small stacking land area drainage tunnel; 11-a first small stack of sluice wells; 12-a first small stack floodgate inlet; 13-the first small stack outlet of the sluice gate; 14 a second section of small stacking land area drainage tunnel; 15-a second small stack of siphon wells; 16-a third section of small stacking land area drainage tunnel; 17-a second small stack of drainage sluice wells; 18-a second small stack floodgate inlet; 19-the second small stack discharge gate outlet; 20-a fourth section of small-pile land drainage tunnel; 21-small stack drainage gate group; 22-a first large-pile unit; 23-a second large-pile unit; 24-small pile group.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Examples
As shown in fig. 1, the present embodiment provides a nuclear power drainage system, which includes a small pile drainage device for draining small piles and a large pile drainage device for draining large piles, wherein the small pile drainage device includes a small pile land drainage tunnel, the large pile drainage device includes a large pile sea drainage tunnel, an outlet of the small pile land drainage tunnel is connected with the large pile sea drainage tunnel, and drainage in the small pile drainage device is discharged to the open sea through the outlet of the large pile sea drainage tunnel.
The drainage in the drainage device is discharged to the open sea through the outlet of the large-pile sea area drainage tunnel, the small-pile drainage device and the large-pile drainage device share the large-pile sea area drainage tunnel for drainage, and the small-pile sea area drainage tunnel which is designed for the small-pile drainage device independently and has higher construction cost is omitted for drainage, so that the construction cost of a nuclear power drainage system is reduced, and the economical efficiency of engineering construction is facilitated.
The small pile land area drainage tunnel is used for discharging small pile circulating water, factory water and other drainage water; the small-heap-land-area drainage tunnel can be made of cast-in-place reinforced concrete, high-density polyethylene (HDPE) and other materials, the section of the small-heap-land-area drainage tunnel can be square, circular, horseshoe-shaped and the like, the flow speed of drainage in the small-heap-land-area drainage tunnel is 1.0-3.0 m/s, the single small-heap-land-area drainage tunnel is designed to have 50-100% of flow, and the route can be in a straight line shape, a broken line shape or a bent shape.
The large-pile sea area drainage tunnel is used for discharging drainage to open sea, materials such as cast-in-place reinforced concrete and High Density Polyethylene (HDPE) can be used, the flow speed of drainage in the large-pile sea area drainage tunnel is 1.0-3.0 m/s, and the flow in the single large-pile sea area drainage tunnel is 50% -100%. The section of the large-pile sea drainage tunnel is 4200mm multiplied by 4800m (width multiplied by height).
Preferably, there are at least two of the small stack drainage devices.
In this embodiment, the number of the small-pile drainage devices is 2, and the number of the large-pile drainage devices is 2.
Specifically, in the present embodiment, the small pile includes a small pile unit 24, the large pile includes a first large pile unit 22 and a second large pile unit 23, the small pile drainage device includes a first small pile drainage device and a second small pile drainage device, and the large pile drainage device includes a first large pile drainage device and a second large pile drainage device.
The water outlet of the small pile unit 24 is respectively connected with the first small pile water discharging device and the second small pile water discharging device, the water outlet of the first large pile unit 22 is connected with the first large pile water discharging device, and the water outlet of the second large pile unit 23 is connected with the second large pile water discharging device.
Preferably, the large-pile drainage device comprises a large-pile drainage gate well, an outlet of the large-pile drainage gate well is connected with an inlet of the large-pile sea drainage tunnel, and an outlet of the small-pile land drainage tunnel is connected with an inlet of the large-pile drainage gate well. And after the large-pile drainage gate well receives drainage from the large pile and the small pile simultaneously, the drainage is drained into the open sea through the large-pile sea area drainage tunnel.
Preferably, the large-pile drainage device further comprises a large-pile drainage gate well factory building arranged on the large-pile land drainage tunnel, the large-pile drainage gate well is arranged in the large-pile drainage gate well factory building, and the large-pile drainage gate well factory building is used for overhauling the large-pile land drainage tunnel.
Preferably, the large-pile drainage device further comprises a large-pile siphon well and a large-pile land area drainage tunnel, an outlet of the large-pile siphon well is connected with an inlet of the large-pile land area drainage tunnel, and an outlet of the large-pile land area drainage tunnel is connected with an inlet of the large-pile drainage gate well. When the large pile normally operates, the discharged water of the large pile is discharged into a large pile siphon well, and the discharged water of the large pile comprises large pile circulating water and large pile factory water.
The large-pile land drainage tunnel is used for discharging large-pile circulating water, important factory water drainage and the like, materials such as cast-in-place reinforced concrete and high-density polyethylene (HDPE) can be used, the section of the large-pile land drainage tunnel can be square, circular, horseshoe-shaped and the like, the drainage flow speed in the large-pile land drainage tunnel is 1.0-3.0 m/s, the single large-pile land drainage tunnel is designed to be 50-100% in flow, and the route can be straight line, broken line or bent.
Preferably, there are at least two large-pile drainage devices, each small-pile drainage device comprises a small-pile drainage gate well arranged on a small-pile land drainage tunnel, each small-pile drainage gate well comprises a small-pile drainage gate inlet and a small-pile drainage gate outlet located at the downstream of the small-pile drainage gate inlet, each small-pile drainage gate well is connected with at least one other small-pile drainage gate well to form a small-pile drainage gate group 21, all small-pile drainage gate inlets in the small-pile drainage gate group 21 are communicated with all small-pile drainage gate outlets, and the outlet of each small-pile land drainage tunnel is connected with different large-pile drainage gate wells. Specifically, in this embodiment, the small-pile drainage gate well is close to the large-pile drainage gate well.
Preferably, the number of the large pile drainage devices is not less than that of the small pile drainage devices.
Specifically, the heap drainage device in this embodiment is still including setting up a heap drainage gate well factory building on the heap continental area drainage tunnel, and the heap drainage gate well sets up in the heap drainage gate well factory building, and the heap drainage gate well factory building is used for overhauing the heap continental area drainage tunnel.
Preferably, when one of the large pile units is overhauled, the large pile drainage gate well corresponding to the overhauled large pile unit is closed, the other large pile drainage gate wells are opened, the small pile drainage gate outlet of the small pile drainage gate well on the small pile land area drainage tunnel connected with the large pile drainage gate well corresponding to the overhauled large pile unit is closed,
the drainage in the small pile land area drainage tunnel connected with the large pile drainage gate well corresponding to the overhauled large pile unit firstly enters the small pile drainage gate inlet of the small pile drainage gate well on the small pile land area drainage tunnel, then enters the small pile drainage gate group 21 where the small pile drainage gate inlet is positioned, is discharged through the small pile drainage gate outlet of the small pile drainage gate well on other small pile land area drainage tunnels of the small pile drainage gate group 21, enters the outlet of the small pile land area drainage tunnel corresponding to the small pile drainage gate outlet, enters the large pile drainage gate well connected with the outlet of the small pile land area drainage tunnel, and is discharged through the outlet of the large pile sea area drainage tunnel where the large pile drainage gate well is positioned.
Preferably, the small heap drainage device further comprises a small heap drainage gate well factory building arranged on the small heap land area drainage tunnel, the small heap drainage gate well is arranged in the small heap drainage gate well factory building, and the small heap drainage gate well factory building is used for overhauling the small heap land area drainage tunnel.
Preferably, the heap drainage device further comprises a heap siphon well, and an outlet of the heap siphon well is connected with an inlet of the heap land drainage tunnel. When the small reactor normally operates, the water discharged by the small reactor is discharged into the small reactor siphon well, and the water discharged by the small reactor comprises small reactor circulating water and small reactor factory water.
Preferably, at least two heap drains are connected to the drain of one heap unit 24. Specifically, the water outlet of one small pile unit 24 in this embodiment is connected to two small pile water draining devices, when a small pile is stopped for maintenance, one of the small pile water draining devices is closed for dry maintenance, and the service water in the water outlet of the small pile unit 24 is drained through the other small pile water draining device.
Preferably, the water discharged from the small pile water discharging device is small pile circulating water and/or small pile factory water. Specifically, the water discharged in the small pile water discharging device in the embodiment is small pile circulating water and factory water.
Specifically, the large-pile siphon well in the embodiment comprises a first large-pile siphon well 1 and a second large-pile siphon well 5; the large-pile land drainage tunnel comprises a first large-pile land drainage tunnel 2 and a second large-pile land drainage tunnel 6; the large-pile drainage gate well comprises a first large-pile drainage gate well 3 and a second large-pile drainage gate well 7; the large-pile sea area drainage tunnel comprises a first large-pile sea area drainage tunnel 4 and a second large-pile sea area drainage tunnel 8.
Specifically, in this embodiment, the first bulk water discharge device includes: the system comprises a first large-pile siphon well 1, a first large-pile land drainage tunnel 2, a first large-pile drainage gate well 3 and a first large-pile sea drainage tunnel 4 which are connected in sequence; the second bulk water discharge device in this embodiment includes: and the second large-pile siphon well 5, the second large-pile land drainage tunnel 6, the second large-pile drainage gate well 7 and the second large-pile sea drainage tunnel 8 are sequentially connected.
Specifically, the small stack siphon well comprises a first small stack siphon well 9 and a second small stack siphon well 15; the small stacking land area drainage tunnel comprises a first small stacking land area drainage tunnel and a second small stacking land area drainage tunnel; the small stack drainage gate well comprises a first small stack drainage gate well 11 and a second small stack drainage gate well 17. The first small stacking land area drainage tunnel comprises a first section of small stacking land area drainage tunnel 10 and a second section of small stacking land area drainage tunnel 14; the second small stacking land area drainage tunnel comprises a third section of small stacking land area drainage tunnel 16 and a fourth section of small stacking land area drainage tunnel 20. Specifically, in this embodiment, the flow rates of the first small-pile land area drainage tunnel 10 and the third small-pile land area drainage tunnel 16 are designed to be 50% flow rates, and the pipe diameter is DN 1800; the sections of the second section of small stacking land area drainage tunnel 14 and the fourth section of small stacking land area drainage tunnel 20 are 1400mm multiplied by 1800m (width multiplied by height). Length of first-stage small-stacking land drainage tunnel 10 in this embodiment "length of second-stage small-stacking land drainage tunnel 14", length of third-stage small-stacking land drainage tunnel 16 "length of fourth-stage small-stacking land drainage tunnel 20". The length of the second small stacking land area drainage tunnel 14 and the length of the fourth small stacking land area drainage tunnel 20 are the shortest length which can be obtained, because when the first small stacking drainage device is used for dry maintenance, the second small stacking land area drainage tunnel 14 is submerged in water and cannot be used for dry maintenance; when the second small-pile drainage device is used for dry maintenance, the fourth small-pile land drainage tunnel 20 is submerged in water and cannot be used for dry maintenance.
Specifically, in this embodiment, the first pile drainage device includes: a first small-pile siphon well 9, a first section of small-pile land area drainage tunnel 10, a first small-pile drainage gate well 11, a second section of small-pile land area drainage tunnel 14 and a first large-pile sea area drainage tunnel 4 which are connected in sequence; the second heap drainage device in this embodiment includes: a second small-pile siphon well 15, a third section of small-pile land area drainage tunnel 16, a second small-pile drainage gate well 17, a fourth section of small-pile land area drainage tunnel 20 and a second large-pile sea area drainage tunnel 8 which are connected in sequence.
The inlet of the small stack drain gate comprises a first small stack drain gate inlet 12 and a second small stack drain gate inlet 18; the outlet of the small stack drainage gate comprises a first small stack drainage gate outlet 13 and a second small stack drainage gate outlet 19; the first small stack drainage gate well 11 comprises a first small stack drainage gate inlet 12 and a first small stack drainage gate outlet 13, the first small stack drainage gate outlet 13 is positioned at the downstream of the first small stack drainage gate inlet 12, and the first small stack drainage gate outlet 13 is communicated with the first small stack drainage gate inlet 12; the second small stack sluice well comprises a second small stack sluice inlet 18, a second small stack sluice outlet 19, the second small stack sluice outlet 19 being located downstream of the second small stack sluice inlet 18, and the second small stack sluice outlet 19 being in communication with the second small stack sluice inlet 18. The inlet 12 of the first small stack drainage gate is connected with the first section of small stack land area drainage tunnel 10, and the outlet 13 of the first small stack drainage gate is connected with the second section of small stack land area drainage tunnel 14. The inlet 18 of the second small stack drainage gate is connected with the third section of small stack land drainage tunnel 16, and the outlet 19 of the second small stack drainage gate is connected with the fourth section of small stack land drainage tunnel 20.
The first small stack drainage gate well 11 and the second small stack drainage gate well 17 are connected to form a small stack drainage gate group 21, the first small stack drainage gate inlet 12 is communicated with the first small stack drainage gate outlet 13 and the second small stack drainage gate outlet 19, and the second small stack drainage gate inlet 18 is communicated with the first small stack drainage gate outlet 13 and the second small stack drainage gate outlet 19. Specifically, in the present embodiment, the first small stack of drainage gate wells 11 and the second small stack of drainage gate wells 17 are integrally provided.
When the first large stack unit 22 and the second large stack unit 23 normally operate, the first large stack drainage gate well 3 is opened, and the second large stack drainage gate well 7 is opened: the drainage of the first large pile unit 22 enters a first large pile drainage device, sequentially passes through a first large pile siphon well 1, a first large pile land area drainage tunnel 2, a first large pile drainage gate well 3 and a first large pile sea area drainage tunnel 4, and is drained to the open sea through a drainage outlet of the first large pile sea area drainage tunnel 4; the discharged water of the second large pile unit 23 enters a second large pile water discharging device, sequentially passes through a second large pile siphon well 5, a second large pile land area water discharging tunnel 6, a second large pile water discharging gate well 7 and a second large pile sea area water discharging tunnel 8, and is discharged to the open sea through a water discharging port of the second large pile sea area water discharging tunnel 8;
the small stack unit 24 normally operates, the inlet 12 of the first small stack drainage gate, the outlet 13 of the first small stack drainage gate, the inlet 18 of the second small stack drainage gate and the outlet 19 of the second small stack drainage gate are opened, and the drainage of the small stack unit 24 respectively enters the first small stack drainage device and the second small stack drainage device: the water discharge part of the small pile unit 24 enters a first small pile water discharge device, sequentially passes through a first small pile siphon well 9, a first section of small pile land area water discharge tunnel 10, a first small pile water discharge gate well 11, a second section of small pile land area water discharge tunnel 14, a first large pile water discharge gate well 3 and a first large pile sea area water discharge tunnel 4, and is discharged to the open sea through a water discharge port of the first large pile sea area water discharge tunnel 4; the drained water of the rest small pile units 24 enters a second small pile drainage device, sequentially passes through a second small pile siphon well 15, a third section of small pile land drainage tunnel 16, a second small pile drainage gate well 17, a fourth section of small pile land drainage tunnel 20, a second large pile drainage gate well 7 and a second large pile sea drainage tunnel 8, and is drained to the open sea through a water outlet of the second large pile sea drainage tunnel 8.
When the small stack unit 24 normally operates, the first section small stack land drainage tunnel 10 of the first small stack drainage device is overhauled, the inlet 12 and the outlet 13 of the first small stack drainage gate are closed, the inlet 18 and the outlet 19 of the second small stack drainage gate are opened, and the drainage of the small stack unit 24 enters the second small stack drainage device: the water drained by the small pile unit 24 enters a second small pile drainage device, sequentially passes through a second small pile siphon well 15, a third section of small pile land drainage tunnel 16, a second small pile drainage gate well 17, a fourth section of small pile land drainage tunnel 20, a second large pile drainage gate well 7 and a second large pile sea drainage tunnel 8, and is drained to the open sea through a water outlet of the second large pile sea drainage tunnel 8.
When the small stack unit 24 normally operates, the third section small stack land area drainage tunnel 16 of the second small stack drainage device is overhauled, the second small stack drainage gate inlet 18 and the second small stack drainage gate outlet 19 are closed, the first small stack drainage gate inlet 12 and the first small stack drainage gate outlet 13 are opened, and the drainage of the small stack unit 24 enters the first small stack drainage device: the water discharged by the small pile machine set 24 enters the first small pile water discharging device, sequentially passes through the first small pile siphon well 9, the first section of small pile land area water discharging tunnel 10, the first small pile water discharging gate well 11, the second section of small pile land area water discharging tunnel 14, the first large pile water discharging gate well 3 and the first large pile sea area water discharging tunnel 4, and is discharged to the open sea through the water outlet of the first large pile sea area water discharging tunnel 4.
When first big heap unit 22 overhauls, the big heap unit 23 normal operating of second, first big heap drainage gate well 3 closes, and the big heap drainage gate well 7 of second is opened: the discharged water of the second large pile unit 23 enters a second large pile water discharging device, sequentially passes through a second large pile siphon well 5, a second large pile land area water discharging tunnel 6, a second large pile water discharging gate well 7 and a second large pile sea area water discharging tunnel 8, and is discharged to the open sea through a water discharging port of the second large pile sea area water discharging tunnel 8;
the small stack unit 24 normally operates, the first small stack drainage gate inlet 12 is opened, the first small stack drainage gate outlet 13 is closed, the second small stack drainage gate inlet 18 is opened, the second small stack drainage gate outlet 19 is opened, and the drainage of the small stack unit 24 respectively enters the first small stack siphon well 9 and the second small stack siphon well 15: the water discharge part of the small pile unit 24 enters a first small pile water discharge device, sequentially passes through a first small pile siphon well 9, a first section of small pile land area water discharge tunnel 10, a first small pile water discharge gate inlet 12, a second small pile water discharge gate outlet 19, a fourth section of small pile land area water discharge tunnel 20, a second large pile water discharge gate well 7 and a second large pile sea area water discharge tunnel 8, and is discharged to the open sea through a water discharge port of the first large pile sea area water discharge tunnel 8; the drained water of the rest small pile machine sets 24 enters a second small pile drainage device, sequentially passes through a second small pile siphon well 15, a third section of small pile land area drainage tunnel 16, a second small pile drainage gate inlet 18, a second small pile drainage gate outlet 19, a fourth section of small pile land area drainage tunnel 20, a second large pile drainage gate well 7 and a second large pile sea area drainage tunnel 8, and is drained to the open sea through a water drainage port of the second large pile sea area drainage tunnel 8.
When the big heap of unit 23 of second overhauls, first big heap of unit 22 normal operating, the big heap of floodgate well 7 of second is closed, and first big heap of floodgate well 3 is opened: the drainage of the first large pile unit 22 enters a first large pile drainage device, sequentially passes through a first large pile siphon well 1, a first large pile land area drainage tunnel 2, a first large pile drainage gate well 3 and a first large pile sea area drainage tunnel 4, and is drained to the open sea through a water outlet of the first large pile sea area drainage tunnel 4.
The small stack unit 24 normally operates, the inlet 12 of the first small stack drainage gate is opened, the outlet 13 of the first small stack drainage gate is opened, the inlet 18 of the second small stack drainage gate is opened, the outlet 19 of the second small stack drainage gate is closed, and the drainage of the small stack unit 24 respectively enters the first small stack siphon well 9 and the second small stack siphon well 15: the water drained by the small pile unit 24 enters a first small pile water draining device, and the water drained by the small pile unit 24 sequentially passes through a first small pile siphon well 9, a first section of small pile land area water draining tunnel 10, a first small pile water draining gate inlet 12, a first small pile water draining gate outlet 13, a second section of small pile land area water draining tunnel 14, a first large pile water draining gate well 3 and a first large pile sea area water draining tunnel 4 and is drained to the open sea through a water draining port of the first large pile sea area water draining tunnel 4; the drained water of the rest small pile units 24 enters the first small pile drainage device, and the drained water of the small pile units 24 sequentially passes through the second small pile siphon well 15, the third section of small pile land area drainage tunnel 16, the second small pile drainage gate inlet 18, the first small pile drainage gate outlet 13, the second section of small pile land area drainage tunnel 14 and the first large pile sea area drainage tunnel 3 and is drained to the open sea through the water outlet of the first large pile sea area drainage tunnel 3.
It should be noted that the small heap plant site and the large heap plant site in the present embodiment are adjacent to each other. Specifically, the large pile drainage device in the embodiment is an existing facility and resource, the small pile drainage device is a newly-built facility, and the small pile drainage device makes full use of the existing large pile drainage device resource to build a nuclear power drainage system capable of draining a large pile and a small pile simultaneously, so that the construction cost is reduced, and the economy of the construction of the small pile drainage system is facilitated. Compare in independent construction little drainage device and carry out the drainage, the little drainage device of piling in this embodiment has utilized original big sea area drainage tunnel of piling for engineering cost reduces about 40 ~ 70%, is favorable to the economic nature of little drainage device construction.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (9)
1. A nuclear power drainage system is characterized by comprising a small pile drainage device for small pile drainage and a large pile drainage device for large pile drainage, wherein the drainage in the small pile drainage device is small pile circulating water and/or water for a small pile plant, the drainage in the large pile drainage device is large pile circulating water and/or water for a large pile plant,
the small-pile drainage device comprises a small-pile land drainage tunnel, the large-pile drainage device comprises a large-pile land drainage tunnel, a large-pile drainage gate well and a large-pile sea drainage tunnel, an outlet of the large-pile land drainage tunnel is connected with an inlet of the large-pile drainage gate well, and an outlet of the large-pile drainage gate well is connected with an inlet of the large-pile sea drainage tunnel; the outlet of the small-pile land drainage tunnel is connected with the large-pile sea drainage tunnel through a large-pile drainage gate well, and drainage in the small-pile drainage device is discharged to the open sea through the outlet of the large-pile sea drainage tunnel.
2. The nuclear power drainage system according to claim 1, wherein the large pile drainage device further comprises a large pile drainage gate shaft factory building arranged on the large pile land drainage tunnel, the large pile drainage gate shaft is arranged in the large pile drainage gate shaft factory building, and the large pile drainage gate shaft factory building is used for overhauling the large pile land drainage tunnel.
3. The nuclear power drainage system of claim 1, wherein the bulk pile drainage device further comprises a bulk pile siphon well, and an outlet of the bulk pile siphon well is connected with an inlet of the bulk pile land drainage tunnel.
4. The nuclear power drainage system according to any one of claims 1 to 3, wherein the number of the small pile drainage devices is at least two.
5. The nuclear power drainage system according to claim 4, wherein the number of the large-pile drainage devices is at least two, the small-pile drainage devices include small-pile drainage gate wells disposed on the small-pile land area drainage tunnels, each small-pile drainage gate well includes a small-pile drainage gate inlet and a small-pile drainage gate outlet located downstream of the small-pile drainage gate inlet, each small-pile drainage gate well is connected with at least one other small-pile drainage gate well to form a small-pile drainage gate group, all small-pile drainage gate inlets in the small-pile drainage gate group are communicated with all small-pile drainage gate outlets, and the outlet of each small-pile land area drainage tunnel is connected with different large-pile drainage gate wells.
6. The nuclear power drainage system according to claim 5, wherein the small stack drainage device further comprises a small stack drainage gate shaft plant arranged on the small stack land area drainage tunnel, the small stack drainage gate shaft is arranged in the small stack drainage gate shaft plant, and the small stack drainage gate shaft plant is used for overhauling the small stack land area drainage tunnel.
7. The nuclear power drainage system according to any one of claims 1 to 3, wherein the small pile drainage device further comprises a small pile siphon well, and an outlet of the small pile siphon well is connected with an inlet of the small pile land drainage tunnel.
8. The nuclear power drainage system according to any one of claims 1 to 3, wherein at least two small-pile drainage devices are connected to a drainage port of one small-pile unit.
9. The nuclear power drainage system of any one of claims 1 to 3, wherein the small plant site is adjacent to the large plant site.
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