JPH0363715B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to building structures such as underground seawater equipment buildings and turbine buildings in nuclear power plants.

[Technical background of the invention and its problems]

Recently, underground buildings such as seawater equipment buildings and turbine buildings of nuclear power plants have been constructed, with the whole or part of them buried underground. By the way, a large amount of seawater for cooling is distributed in the seawater equipment building and the like. In general, such a seawater equipment building has a large capacity seawater distribution room inside the building body, and seawater is introduced into this seawater distribution room via a water conduit or the like.
The seawater flowing into the seawater circulation chamber is configured to be supplied to a condenser and other heat exchangers by a seawater pump. In addition, there is an equipment storage room that houses various equipment inside the main body of the building.
In underground buildings, this equipment storage room is located below the groundwater level and sea level. Therefore,
In the unlikely event that a leak occurs in the waterproof wall of the building, groundwater or seawater may flow into the equipment housing room. However, the amount of groundwater gushing out is not very large, and even if a large-scale leak occurs in the waterproof wall of the building, the amount of groundwater that will flow into the equipment housing room will be relatively small, and over time, the amount of inflow will increase. is decreasing. Therefore, if this inflowing groundwater is drained using a drainage pump, the equipment in the equipment storage room will not be submerged in water. However, since the seawater distribution chamber is communicated with the sea via a conduit or the like, the amount of seawater that can be supplied into the seawater distribution chamber is unlimited. Therefore, in the event that a large-scale leak occurs in the partition wall separating the seawater distribution room and the equipment storage room, a large amount of seawater may flow into the equipment storage room for a long period of time. Therefore, in such a case, drainage using a drainage pump may not be enough, and the equipment in the equipment housing chamber may be submerged in water. Since seawater is highly corrosive, equipment submerged in seawater cannot be repaired, resulting in large economic losses.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and its purpose is to provide a building structure that can reliably prevent seawater from flowing into an equipment housing chamber.

[Summary of the Invention] The present invention comprises a building body buried underground, an equipment storage chamber formed within the building body to house equipment, and a seawater circulation chamber formed in a part of the building body through which seawater flows. , a double partition wall that partitions this seawater circulation chamber and the equipment storage chamber, and a leakage detection chamber formed between these partition walls and having a width that allows a person to pass through. Therefore, unless leakage occurs in both of the double partition walls, seawater will not flow into the equipment housing chamber, so the possibility that seawater will flow into the equipment housing chamber is extremely small. In addition, a leak detection chamber with a width that allows a person to pass through was created between the double bulkheads, allowing inspectors to enter this leak detection chamber and inspect the presence of leaks and the condition of the bulkheads. It is possible to prevent the occurrence of large-scale leakage, and it is possible to reliably prevent seawater from flowing into the equipment storage room.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. In the figure, 1 is the main body of a building such as a seawater equipment building of a nuclear power plant, which is buried under the ground 2. A device housing chamber 3 is formed within the building body 1, and a heat exchanger 4...other devices 5, 6, and 7 are housed within this device housing chamber 3. Furthermore, a seawater desalination device 8 is provided on top of the building main body 1. Furthermore, this building body 1
The outer peripheral wall 9 has a waterproof structure, and a sub-drain (not shown) for draining underground water is formed around the outer peripheral wall 9 to prevent the intrusion of underground water. In addition, a seawater distribution chamber 10 is formed in a part of this building body 1,
This seawater circulation chamber 10 is communicated with the sea via headraces 12, 12, and is configured such that seawater flows into this seawater circulation chamber 10 through these headraces 12, 12. Further, a seawater pump device 13 is provided at the top of this seawater inflow chamber 10.
The seawater flowing into the seawater circulation chamber 10 is configured to be sent to the heat exchangers 4, etc. by the seawater pump devices 13. In addition, this seawater distribution room 1
0 and the equipment storage chamber 3 are the first partition wall 14 and the second partition wall 14.
It is divided by a double partition wall 15. The first partition wall 14 and the second partition wall 15 are made of reinforced concrete similar to the building main body 1, and are waterproofed to have a waterproof structure. and,
A leak detection chamber 16 is formed between the first partition wall 14 and the second partition wall 15. The leakage detection chamber 16 has a width that a person can pass through, for example, 1.0 m or more. Further, the first partition wall 14
The lower end, middle part, and upper end of the second partition wall 15 are made of reinforced concrete, such as a lower floor wall 17 and a middle floor wall 18.
and are integrally connected to each other by an upper floor wall 19. Moreover, these first partition walls 14 and second partition walls 1
5 are integrally connected to each other by a plurality of vertically extending connecting walls 20 made of reinforced concrete. Therefore, these first partition walls 14, second
Partition wall 15, lower floor wall 17, middle floor wall 18, upper floor wall 1
9 and the connecting walls 20... form a strong box-shaped structure. In addition, a plurality of water drop holes 21 are formed in each of the middle floor wall 18 and the upper floor wall 19, and the water accumulated on the middle floor wall 18 and the upper floor wall 19 is passed through these water drop holes 21 to the lower floor wall. 1
It is configured to flow down to 7. In addition, gratings 22... are placed above these water drop holes 21...
It is constructed so that inspectors and others can walk freely. Furthermore, passage holes 23 are formed in the connecting walls 20, respectively, so that workers and the like can move freely within the leak detection chamber 16. Further, inside this leak detection chamber 16, ladders 24, 24 for climbing with back baskets are provided, and inspectors, etc.
It is constructed so that it can be moved up and down freely. Furthermore, drain pits 25, 25 are formed at both ends of the lower floor wall 17, respectively, and all the water that has flowed into the leak detection chamber 16 flows into these drain pits 25, 25. The water accumulated in these drain pits 25, 25 is discharged by a drain pump 27.
In addition, a water level detection mechanism 28 is provided in these drain pits 25, 25, and the drain pit 2
When the water level in the drain pits 25, 25 rises above a predetermined water level, this is detected, and an alarm signal is output, and the drain pump 27 is operated.
Drain the water inside. Further, the seawater pump device 1
3... and the water drop hole 21... of the upper floor wall 19, a wall 29 is provided to surround the water drop hole 21...
3... or if seawater leaks from the pipes (not shown) connected to these, the seawater is constructed so as not to flow out of the wall 29. Note that the seawater accumulated inside this wall 29 flows into the leak detection chamber 16 through the water drop holes 21 .

Next, the operation of the above embodiment will be explained. The seawater distribution chamber 10 and the equipment storage chamber 3 are separated by a first partition wall 14.
Since it is divided by the double partition walls of the second partition wall 15 and the second partition wall 15, seawater will not flow into the equipment storage chamber 3 even if a leak occurs in either side. In addition, the first partition wall 14 and the second partition wall 15 are integrally connected by a lower floor wall 17, a middle floor wall 18, an upper floor wall 19, and a connecting wall 20, forming a strong box-shaped structure. Therefore, even in an earthquake or the like, the first partition wall 14 or the second partition wall 15 will not be damaged and leakage will not occur. In addition, a leak detection chamber 16 with a width that allows a person to pass through is formed between the first partition wall 14 and the second partition wall 15.
Since an inspector can enter the leak detection chamber 16 and inspect the condition of the first partition wall 14 and the like, it is possible to prevent leaks from occurring. Furthermore, if a leak occurs in the first partition wall 14 or the like, seawater will flow into the leak detection chamber 16, the water level in the drain pits 25, 25 will rise, and the water level detection mechanism 28 will output an alarm signal. Therefore, the occurrence of leakage can be detected immediately, and the leakage location can be repaired at an early stage.

〔Effect of the invention〕

As described above, the present invention includes a building body buried underground, an equipment storage chamber formed within the building body to house equipment, a seawater circulation chamber formed in a part of the building body through which seawater flows, and It is equipped with a double partition wall that partitions the seawater circulation chamber and the equipment storage chamber, and a leakage detection chamber formed between these partitions and having a width that allows a person to pass through. Therefore, unless leakage occurs in both of the double partition walls, seawater will not flow into the equipment housing chamber, and the possibility of seawater flowing into the equipment housing chamber is extremely small. In addition, a leak detection chamber with a width that allows a person to pass through was created between the double bulkheads, allowing inspectors to enter this leak detection chamber and inspect the presence of leaks and the condition of the bulkheads. The effects are great, such as being able to prevent large-scale leaks from occurring and reliably preventing seawater from flowing into the equipment storage room.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along the - line in FIG. 1, and FIG. 3 is a sectional view taken along the - line in FIG. 4 is a sectional view taken along the - line in FIG. 1, and FIG. 5 is an enlarged vertical sectional view showing the partition wall portion. 1...Building body, 3...Equipment storage room, 10...
Seawater distribution room, 14...first bulkhead, 15...second
Bulkhead, 16... Leak detection room.

Claims (1)

[Claims] 1. A building body buried underground, an equipment storage room formed within this building body to house equipment, a seawater circulation room formed as a part of the building body and through which seawater flows, and this seawater circulation room and the above-mentioned A building structure characterized by comprising a double partition wall that partitions an equipment storage room, and a leak detection room formed between these partition walls and having a width that allows a person to pass through.