WO2016031322A1

WO2016031322A1 - Building

Info

Publication number: WO2016031322A1
Application number: PCT/JP2015/064810
Authority: WO
Inventors: 琴世水野; 邦彦佐藤; 圭輔笹島; 清水　弘; 松岡　真二
Original assignee: 三菱重工業株式会社
Priority date: 2014-08-25
Filing date: 2015-05-22
Publication date: 2016-03-03
Also published as: JP2016044483A

Abstract

A building is provided with: a lower foundation plate (31) that is provided on the ground (22); an upper foundation plate (32) that is provided above the lower foundation plate (31) and on which a containment building (11) is disposed; a seismic isolation device (33) that has a plurality of seismic isolation structures (36) disposed at prescribed intervals in the horizontal direction between the lower foundation plate (31) and the upper foundation plate (32); a slope (41) that is provided on the upper face of the lower foundation plate (31) and that inclines down toward the outside; and a side groove (42) that is provided on the outer side of the slope (41). Thus, the capacity for preventing disasters can be improved

Description

Building

The present invention relates to a building such as a containment vessel equipped with a seismic isolation device.

One of the nuclear power plants is a pressurized water reactor. In this pressurized water reactor, light water is used as a reactor coolant and a neutron moderator, and high-temperature and high-pressure water that does not boil throughout the primary system is used. Water is sent to a steam generator to generate steam by heat exchange, and this steam is sent to a turbine generator to generate electricity.

In such a nuclear power plant having a pressurized water reactor, the containment vessel is erected on a foundation plate laid on the ground, and this foundation plate has a seismic isolation structure. As a basic version having such a seismic isolation structure, for example, there is one described in Patent Document 1 below. In the basic version of the building of the nuclear facility described in Patent Document 1, a seismic isolation device is provided between the lower basic version provided on the ground and the upper basic version in which the reactor containment vessel is erected. .

And in such a nuclear power plant, although the seismic isolation device has a combustible structure constituted by laminated rubber and oil dampers, generally a fireproof coating material is provided on the outside and sufficient Fire resistance is ensured. However, in order to increase the safety of the seismic isolation device, further fire prevention measures for the seismic isolation device are necessary. As a conventional protection structure for a seismic isolation device, for example, there is one described in Patent Document 2 below. The protection structure for a seismic isolation device described in Patent Document 2 is provided with a protection cover surrounding the isolator.

JP 2013-249711 A JP-A-10-280728

Conventional seismic isolation devices have been provided with a fireproof coating on the outside and a protective cover that surrounds them. However, if a flammable fluid such as fuel or oil enters from the outside, the flame is flammable. There is a risk of igniting the fluid and fire. In the event of a fire, there is a risk that sufficient safety of the seismic isolation device cannot be ensured only with the fireproof covering material and the protective cover.

This invention solves the subject mentioned above, and aims at providing the building which aims at the improvement of disaster prevention performance.

In order to achieve the above object, the building of the present invention comprises a lower foundation plate provided on the ground, an upper foundation plate provided above the lower foundation plate and provided with a structure, and the upper foundation plate. A seismic isolation apparatus having a plurality of seismic isolation structures arranged at predetermined intervals in the horizontal direction between the lower base plate, and a slope provided on an upper surface of the lower base plate and inclined downward toward the outside. And a side groove provided outside the slope.

Therefore, when a flammable liquid enters between the upper base plate and the lower base plate, the liquid moves to the outside by the slope provided on the upper surface of the lower base plate and flows into the side groove. Therefore, the flammable liquid does not flow into the plurality of seismic isolation structures, preventing damage to the seismic isolation apparatus having the seismic isolation structures from fire and improving the disaster prevention performance of the building.

In the building of the present invention, the slope is provided outside the seismic isolation device.

Therefore, by providing a slope outside the seismic isolation device, it is possible to stably install a plurality of seismic isolation structures on the upper surface of the lower base plate, and to bring flammable liquid into contact with the seismic isolation structure Without a slope, it can be poured safely into the side groove.

In the building of the present invention, a plurality of water collecting basins are provided at predetermined intervals in the circumferential direction on the upper surface of the lower foundation plate, the side grooves communicate with the plurality of water collecting basins, and the slope is the plurality of water collecting basins. It is characterized by inclining downward toward the water tank.

Therefore, the flammable liquid that has entered between the upper base plate and the lower base plate moves outward by the slope and flows into the side groove, and is then collected in each catchment. Can be safely isolated in the position of.

In the building of the present invention, the water collecting basin is provided with a drainage device.

Therefore, the flammable liquid collected in each catchment basin is discharged to the outside from the catchment basin by the drainage device, and the flammable liquid can be safely discharged.

The building of the present invention is characterized in that a fire extinguishing device for supplying a fire extinguishing agent toward the side groove is provided.

Therefore, when the flammable liquid that has entered between the upper base plate and the lower base plate moves outward by the slope and flows into the side groove, and is ignited by a fire type, the fire extinguishing agent is directed toward the flame by the fire extinguishing device. It will be supplied and fire extinguishing activities can be performed quickly.

The building of the present invention is characterized in that a fire wall is provided between the upper base plate and the lower base plate so as to surround the plurality of seismic isolation structures from the outside.

Therefore, by providing a fire wall that surrounds multiple seismic isolation structures from the outside, the flammable liquid that has entered between the upper and lower foundation plates flows to the seismic isolation structure side while being blocked by the fire protection walls. The flammable liquid can be safely poured into the side groove by the slope without contacting the seismic isolation structure.

The building of the present invention is characterized in that the fire wall has flexibility.

Therefore, because the fire wall is flexible, even if an earthquake occurs and the upper base plate moves relative to the lower base plate by the seismic isolation device, the fire wall will not be damaged and safety Can be improved.

In the building of the present invention, the fire wall includes an upper fire wall fixed to a lower part of the upper base plate and a lower fire wall fixed to an upper part of the lower base plate, and a lower part of the upper fire wall. And an upper part of the lower fire wall are connected to each other so as to be relatively movable in a vertical direction and a horizontal direction.

Therefore, since the upper and lower firewalls are relatively movable in the vertical and horizontal directions, even if an earthquake occurs and the upper base plate moves relative to the lower base plate by the seismic isolation device, The wall is not damaged and safety can be improved.

In the building according to the present invention, a retaining wall is provided around the lower foundation plate so as to surround the upper foundation plate, and is horizontally closed between the upper surface of the upper foundation plate and the upper surface of the retaining wall. A member is provided.

Therefore, the gap between the upper surface of the upper base plate and the upper surface of the retaining wall is closed by the closing member, and the intrusion of a dangerous substance such as a flammable liquid from the gap can be prevented.

The building of the present invention is characterized in that a ventilation device is provided for discharging the air in the space between the upper base plate and the lower base plate.

Therefore, if a fire occurs in the space between the base plate and the lower base plate, the harmful gas generated inside by the ventilator will be discharged to the outside, and safety can be improved.

In the building of the present invention, the ventilation device includes an exhaust passage that penetrates the retaining wall inward and outward, a filter that is provided in the exhaust passage and collects harmful substances, and sends air in the space to the exhaust passage. And an exhaust fan for feeding.

Therefore, harmful gas generated inside can be easily discharged to the outside with a simple configuration.

The building of the present invention is characterized in that a fire detector is provided for detecting a fire in the space between the upper base plate and the lower base plate.

Therefore, the fire detector detects a fire that has occurred in the space between the upper base plate and the lower base plate, and safety can be improved.

According to the building of the present invention, a seismic isolation device having a plurality of seismic isolation structures disposed between the upper base plate and the lower base plate, and provided downward on the upper surface of the lower base plate. Since the slope which inclines and the side groove provided in the outer side of a slope are provided, the disaster prevention performance of a building can be improved.

Drawing 1 is a schematic structure figure showing the building of a 1st embodiment. FIG. 2 is a schematic plan view showing the building. FIG. 3 is a cross-sectional view of the main part showing the basic version of the building. FIG. 4 is a cross-sectional view of a main part showing a basic version of the building. FIG. 5 is a cross-sectional view illustrating a modified example of the fire wall. FIG. 6 is a cross-sectional view illustrating a modified example of the fire wall. FIG. 7 is a schematic plan view showing the building of the second embodiment. FIG. 8 is a cross-sectional view of the main part showing the basic version of the building.

Hereinafter, preferred embodiments of a building according to the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, and when there are two or more embodiments, what comprises combining each embodiment is also included.

[First Embodiment]
The nuclear reactor according to the first embodiment uses light water as a reactor coolant and a neutron moderator, and generates high-temperature and high-pressure water that does not boil over the entire core. And a pressurized water reactor (PWR) that generates power by sending the steam to a turbine generator.

FIG. 1 is a schematic configuration diagram showing the building of the first embodiment, and FIG. 2 is a schematic plan view showing the building.

In the first embodiment, as shown in FIGS. 1 and 2, the reactor containment vessel 11 contains a pressurized water reactor 12, a steam generator 13, a pressurizer 14, and the like. The reactor containment vessel 11 is installed on a solid ground 22 such as a rock through a foundation plate 21. That is, the ground 23 is dug down to the ground 22 by a predetermined depth to form a recess 24, the base plate 21 is installed in the recess 24, and the reactor containment vessel 11 is erected on the base plate 21.

The basic version 21 is composed of a lower basic version 31, an upper basic version 32, and a seismic isolation device 33. The lower basic plate 31 and the upper basic plate 32 have a rectangular shape in plan view, and the reactor containment vessel 11 has a circular shape in plan view. The lower base plate 31 has, for example, a reinforced concrete structure (RC structure) in which a reinforcing bar is incorporated, and is laid on the ground 22 that is flatly formed in the recess 24, and has a height substantially the same as that of the ground 23 around the periphery. The retaining wall 34 is formed, and is constructed in a rectangular shape or a rectangular shape so that its surface (upper surface) is flat.

The upper base plate 32 has, for example, a reinforced concrete structure (RC structure) in which a reinforcing bar is incorporated therein, and the surface (upper surface) of the upper base plate 32 is substantially the same as that of the ground 23. It is constructed in a rectangular parallelepiped shape or a rectangular parallelepiped shape so that its height and the front surface and back surface (lower surface) are flat. The upper base plate 32 is provided with a plurality of space portions 35 for accommodating various devices. The upper basic version 32 is provided with the reactor containment vessel 11 as a structure on the upper surface.

The seismic isolation device 33 is provided between the upper surface of the lower base plate 31 and the lower surface of the upper base plate 32. The seismic isolation device 33 is configured by arranging a plurality of seismic isolation structures 36 in a grid pattern at predetermined intervals (preferably at equal intervals) in the horizontal direction. The seismic isolation structure 36 has, for example, a multi-layer seismic isolation structure in which disc-shaped rubber materials and disc-shaped steel plates are alternately stacked. The seismic isolation structure 36 is not limited to a multilayer seismic isolation structure, and may be, for example, a hydraulic damper. Each seismic isolation structure 36 has a lower portion fixed to the upper surface of the lower base plate 31 and an upper portion fixed to the lower surface of the upper base plate 32.

The reactor containment vessel 11 is a reinforced concrete reactor containment vessel (PCCV: Prestressed Concrete Containment Vessel) or steel plate concrete containment vessel (SCCC: Steal Concrete Containment) using pre-stressed steel wire (Tendon). Vessel), or a nuclear reactor containment vessel such as a reinforced concrete containment vessel (RCCV: Reinforced Concrete Containment Vessel) or a steel reactor containment vessel (SCV: Steel Containment Vessel). Therefore, the base plate 21 needs to properly support the reactor containment vessel 11 that is a heavy object and ensure high earthquake resistance by the seismic isolation device 33.

And in this embodiment, the flame protection apparatus 40 of a building is provided. FIG.3 and FIG.4 is principal part sectional drawing showing the foundation version of a building.

In the flame protection device 40, as shown in FIGS. 1 to 3, a slope 41 is provided on the upper surface of the lower base plate 31 that is inclined downward toward the outside. The slope 41 is provided outside the seismic isolation device 33. A side groove 42 is provided outside the slope 41.

That is, the lower foundation plate 31 is provided with a retaining wall 34 surrounding the upper foundation plate 32 around the periphery, and a predetermined distance is secured in the horizontal direction between the upper foundation plate 32 and the retaining wall 34, An open space S is secured. The lower base plate 31 is provided with a horizontal upper surface portion 31a facing the upper base plate 32, and a slope 41 is provided outside the upper surface portion 31a. In this case, since the lower base plate 31 has a rectangular parallelepiped shape or a rectangular parallelepiped shape, a slope 41 that is inclined downward from the four sides of the outer periphery toward the outside is provided.

The side groove 42 is provided inside the retaining wall 34 in the lower base plate 31. The side groove 42 is provided continuously with the outer end portion of the slope 41 and has a bottom surface lower than the outer end portion of the slope 41. In this case, since the retaining wall 34 has a square ring shape in plan view, the side groove 42 has a square ring shape in plan view along the inside of the retaining wall 34. Therefore, the slope 41 can collect the fluid that has entered the space S, in particular, the flammable liquid, by flowing it into the side groove 42.

Further, the lower base plate 31 is provided with a fire extinguishing device 51 that supplies a fire extinguishing agent to the retaining wall 34 toward the side groove 42. The fire extinguishing device 51 is configured such that a fire extinguishing pipe 52 extends from the outside of the lower base plate 31 through the retaining wall 34 to the inside. The fire extinguishing pipe 52 can be connected to a fire extinguishing agent storage source such as a fire extinguishing tank (not shown) at the base end, and can supply the fire extinguishing agent by operating a pump (not shown) or operating an on-off valve. Further, the extinguishing pipe 52 has a tip portion extending toward the side groove 42 and can supply a fire extinguishing agent to the flame that is collected in the side groove 42 and ignited. A plurality of fire extinguishing devices 51 are provided at predetermined intervals in the circumferential direction of the retaining wall 34.

Further, a fire wall 61 is provided between the lower base plate 31 and the upper base plate 32 to surround the plurality of seismic isolation structures 36 from the outside. The fire wall 61 has a square cylindrical shape surrounding the plurality of seismic isolation structures 36 from the outside. The lower part is fixed to the upper part of the lower base plate 31 and the upper part is fixed to the lower part of the upper base plate 32. It has flexibility and fire resistance. Therefore, the fire wall 61 can partition a plurality of seismic isolation structures 36 inside the space S.

A closing member 62 that is movable in the horizontal direction is provided between the upper surface of the upper base plate 32 and the upper surface of the retaining wall 34. The closing member 62 includes a first closing plate 63 fixed to the upper surface of the upper base plate 32 and a second closing plate 64 fixed to the upper surface of the retaining wall 34. Part of the plate 64 overlaps. In this case, since the space portion S formed by the upper base plate 32 and the retaining wall 34 has a square ring shape in plan view, the closing member 62 has a square ring shape having a width wider than the width of the space portion S. I am doing. Therefore, the closing member 62 can close the space part S.

As shown in FIG. 4, a ventilation device 71 for discharging the air in the space S to the outside is provided. The ventilation device 71 supplies the exhaust passage 72 that penetrates the retaining wall 34 inward and outward, a filter 73 that is provided in the exhaust passage 72 and collects harmful substances, and supplies the air in the space S to the exhaust passage 72. And an exhaust fan 74. The exhaust fan 74 is installed in a support base 75 fixed to the wall surface of the retaining wall 34 in the space S. Therefore, when a fire occurs in the space portion S, the ventilator 71 can discharge to the outside after removing harmful substances from smoke generated by the fire. A plurality of ventilation devices 71 are provided at predetermined intervals in the circumferential direction of the retaining wall 34.

A fire detector 76 for detecting a fire in the space S is provided. The fire detector 76 is a smoke detector, a temperature sensor, a fire alarm or the like, and outputs a detection signal to a control device (not shown). Then, the control device receives this detection signal and operates the fire extinguishing device 51 and the ventilation device 71.

In addition, in this embodiment, although the fire wall 61 was made flexible, it is not limited to this structure. 5 and 6 are sectional views showing modifications of the fire wall.

As shown in FIG. 5, the fire wall 81 has an upper fire wall 82 fixed to the lower part of the upper base plate 32 and a lower fire wall 83 fixed to the upper part of the lower base plate 31. The upper fire wall 82 has a horizontal locking piece 82a fixed to the lower end portion, and the lower fire wall 83 has a connection piece 83a having a U-shaped cross section fixed to the upper end portion. And it connects with the locking piece 82a in the upper fire wall 82 so that the connection piece 83a of the lower fire wall 83 may surround. Since the lower part of the upper fire wall 82 and the upper part of the lower fire wall 83 are connected with a predetermined gap, they can move relative to each other in the vertical direction and the horizontal direction.

As shown in FIG. 6, the fire wall 86 has an upper fire wall 87 fixed to the lower part of the upper base plate 32 and a lower fire wall 88 fixed to the upper part of the lower base plate 31. . The upper fire wall 87 has a lower end portion connected to a pair of rotatable wheels 87b by a horizontal shaft 87a, and the lower fire wall 88 has an upper end portion to which a connecting piece 88a having a U-shaped cross section is fixed. And it connects with the wheel 87b in the upper fire wall 87 so that the connection piece 88a of the lower fire wall 88 may surround. Since the lower part of the upper fire wall 87 and the upper part of the lower fire wall 83 are connected with a predetermined gap, they can move relative to each other in the vertical and horizontal directions.

Here, the operation of the flame protection device 40 of the present embodiment will be described. As shown in FIG. 1 to FIG. 4, for example, when oil leaks from the reactor containment vessel 11 or fuel leaks due to the fall of the aircraft, flammable liquid such as oil or fuel is caught between the blocking members 62. Intrudes into the space S. In this case, since the closing member 62 is not a complete sealing structure, the flammable liquid enters the space S through the gap.

Then, the flammable liquid enters the space S from the periphery of the closing member 62 and falls onto the slope 41. The combustible liquid falling on the slope 41 flows outward along the inclination and flows into the side groove 42. Therefore, the attachment of the flammable liquid to the plurality of seismic isolation structures 36 is prevented. In addition, since the plurality of seismic isolation structures 36 are surrounded by the fire wall 61 from the outside, adhesion of the flammable liquid to the plurality of seismic isolation structures 36 is also prevented in this respect.

Thereafter, when a fire is generated by igniting the combustible liquid collected in the side groove 42, the fire detector 76 detects the fire and outputs a detection signal, and the control device receives the detection signal, and the fire extinguishing device 51 and the ventilator 71 are operated. The fire extinguishing device 51 supplies a fire extinguishing agent to the flame that is collected in the side groove 42 through the fire extinguishing pipe 52 and ignited. The ventilator 71 operates the exhaust fan 74 to remove harmful substances such as smoke generated by the fire in the space S and discharge the smoke to the outside.

As described above, in the building of the first embodiment, the lower foundation plate 31 provided on the ground 22 and the upper foundation plate 32 provided above the lower foundation plate 31 and provided with the reactor containment vessel 11 are provided. The seismic isolation device 33 having the seismic isolation structures 36 arranged in the horizontal direction at a predetermined interval between the upper base plate 32 and the lower base plate 31 and the upper surface of the lower base plate 31 are provided outward. A slope 41 inclined downward and a side groove 42 provided on the outer side of the slope 41 are provided.

Therefore, when a flammable liquid enters the space S, the liquid moves outward by the slope 41 provided on the upper surface of the lower base plate 31 and flows into the side groove 42. Therefore, the flammable liquid does not flow into the plurality of seismic isolation structures 36, and damage to the seismic isolation device 33 having the seismic isolation structures 36 due to fire can be prevented, and the disaster prevention performance of the building can be improved. .

In the building of the first embodiment, the slope 41 is provided outside the seismic isolation device 33. Accordingly, a plurality of seismic isolation structures 36 can be stably installed on the upper surface of the lower base plate 31, and the side grooves 42 can be safely secured by the slope 41 without contacting the flammable liquid with the seismic isolation structure 36. Can be poured into.

In the building of the first embodiment, a fire extinguishing device 51 that supplies a fire extinguishing agent toward the side groove 42 is provided. Therefore, the flammable liquid that has entered between the upper foundation plate 32 and the lower foundation plate 31 moves outward by the slope 41 and flows into the side groove 42, and then, when ignited by a fire type, Fire extinguishing agent will be supplied towards the fire extinguisher, and fire extinguishing activities can be performed quickly.

In the building of the first embodiment, a fire wall 61 is provided between the upper base plate 32 and the lower base plate 31 so as to surround a plurality of seismic isolation structures 36 from the outside. Therefore, the flammable liquid that has entered between the upper foundation plate 32 and the lower foundation plate 31 is not blocked by the fire wall 61 and does not flow to the seismic isolation structure 36 side. The slope 41 can safely flow into the side groove 42 without contacting the body 36.

In the building of the first embodiment, the fire wall 61 has flexibility and fire resistance. Therefore, even if an earthquake occurs and the upper base plate 31 is moved relative to the lower base plate 31 by the seismic isolation device 33, the fire wall 61 is not damaged, and safety can be improved.

In the building of the first embodiment, the

fire walls

81 and 86 are the

upper fire walls

82 and 87 fixed to the lower part of the upper base plate 32, and the

lower fire walls

83 and 88 fixed to the upper part of the lower base plate 31. The lower part of the

upper fire walls

82 and 87 and the upper part of the

lower fire walls

83 and 88 are connected to each other so as to be relatively movable in the vertical direction and the horizontal direction. Therefore, even if an earthquake occurs and the upper base plate 32 is moved relative to the lower base plate 31 by the seismic isolation device 33, the

fire walls

81 and 86 are not damaged, and safety can be improved. it can.

In the building of the first embodiment, a retaining wall 34 surrounding the upper foundation plate 32 is provided around the lower foundation plate 31, and is movable in the horizontal direction between the upper surface of the upper foundation plate 32 and the upper surface of the retaining wall 34. An obstructing member 62 is provided. Accordingly, the gap between the upper surface of the upper base plate 32 and the upper surface of the retaining wall 34 is closed by the closing member 62, and invasion of dangerous substances such as flammable liquids into the space S from the gap is prevented. Can do.

In the building of the first embodiment, a ventilation device 71 is provided to discharge air in the space S between the upper base plate 32 and the lower base plate 31. Therefore, when a fire occurs in the space S between the upper base plate 32 and the lower base plate 31, harmful gas generated inside by the ventilator 71 is discharged to the outside, and safety can be improved. .

In the building of the first embodiment, the ventilation device 71 exhausts the air in the space portion S, the exhaust passage 72 penetrating the retaining wall 34 in and out, the filter 73 provided in the exhaust passage 72 and collecting harmful substances. An exhaust fan 74 that feeds the passage 72 is provided. Therefore, harmful gas generated inside can be easily discharged to the outside with a simple configuration.

In the building of the first embodiment, a fire detector 76 that detects a fire in the space S is provided. Therefore, the fire detector 75 detects a fire that has occurred in the space S, and the fire extinguishing device 51 and the ventilation device 71 can be automatically operated to improve safety.

[Second Embodiment]
FIG. 7 is a schematic plan view showing a building according to the second embodiment, and FIG. 8 is a cross-sectional view of a main part showing a basic version of the building. In addition, the same code | symbol is attached | subjected to the member which has the same function as embodiment mentioned above, and detailed description is abbreviate | omitted.

In the second embodiment, as shown in FIG. 7 and FIG. 8, the lower base plate 31 is provided with a slope 41 that is inclined downward on the upper surface outwardly from the seismic isolation device 33. A side groove 42 is provided outside 41.

The lower base plate 31 is provided with a plurality of water collecting basins 91 at predetermined intervals along the circumferential direction on the upper surface, and the side grooves 42 communicate with the water collecting basins 91. Each drainage basin 91 is provided inside the retaining wall 34 at the outer peripheral portion of the lower base plate 31. Each drainage basin 91 is provided at a corner portion of the side groove 42 having a square ring shape and an intermediate portion of the linear portion, and communicates with the side groove 42. And the slope 41 and the side groove 42 incline below toward each water catchment 91.

All drainage basins 91 are provided with a drainage device 92. The drainage device 92 includes a drainage hole 93, a drainage pipe 94, a drainage pump 95, and an on-off valve 96. The drainage basin 91 has a drain hole 93 formed at the bottom, and one end of a drain pipe 94 is connected to the drain hole 93. The drainage pipe 94 is provided with a drainage pump 95 and an on-off valve 96, and the other end is connected to a wastewater treatment apparatus (not shown). Therefore, when the drainage device 92 is activated, the flammable liquid accumulated in the drainage basin 91 flows into the drainage pipe 94 through the drainage hole 93, and when the drainage pump 95 is operated to open the on-off valve 96, the flammable liquid is removed. The waste water can be fed to the waste water treatment device by the drain pipe 94.

That is, when a flammable liquid such as oil or fuel enters the space S from between the closing members 62, the flammable liquid falls on the slope 41 and flows outward along the slope, and flows into the side groove 42. . Therefore, the attachment of the flammable liquid to the plurality of seismic isolation structures 36 is prevented. In addition, since the plurality of seismic isolation structures 36 are surrounded by the fire wall 61 from the outside, adhesion of the flammable liquid to the plurality of seismic isolation structures 36 is also prevented in this respect.

Thereafter, when the drainage device 92 is actuated, that is, when the drainage pump 95 is actuated and the on-off valve 96 is opened, the flammable liquid accumulated in the drainage basin 91 flows into the drainage pipe 94 through the drainage hole 93. To the wastewater treatment equipment.

As described above, in the building according to the second embodiment, the slope 41 that is inclined downward toward the outside is provided on the upper surface of the lower foundation plate 31, the side grooves 42 are provided outside the slope 41, and the lower foundation plate 31. A plurality of water collecting basins 91 are provided at predetermined intervals in the circumferential direction on the upper surface of the basin, and communicated with the side grooves 42 and each water basin 91, and the slope 41 is inclined downward toward the water basin 91.

Therefore, when a flammable liquid enters the space S, the liquid moves outward by the slope 41 provided on the upper surface of the lower base plate 31 and flows into the side groove 42. Will be collected. Therefore, the flammable liquid does not flow into the plurality of seismic isolation structures 36, and damage to the seismic isolation device 33 having the seismic isolation structures 36 can be prevented. Further, the flammable liquid can be safely isolated at a predetermined position separated from the seismic isolation structure 36 to prevent diffusion, and the disaster prevention performance of the building can be improved.

In the building of the second embodiment, a drainage device 92 is provided in the water collecting tank 91. Therefore, the flammable liquid collected in each water collecting basin 91 is discharged to the outside from the water collecting basin 91 by the drainage device 92, and the flammable liquid can be safely discharged.

In the second embodiment, the fire extinguishing device 51, the ventilation device 71, and the fire detector 76 described in the first embodiment are omitted, but these may be provided. In this case, it is desirable that the fire extinguishing apparatus 51 is provided at the same position corresponding to the plurality of water collecting tanks 91.

Further, in the above-described embodiment, the inclination angle and shape of the slope 41 (linear shape, curved shape), and the shape of the side groove 42 (a U-shaped cross section, a semicircular cross section, an inclined bottom surface) are the

base plates

31, 32, What is necessary is just to set suitably by the shape, dimension, etc. of the retaining wall 34 and the seismic isolation apparatus 33. FIG.

In the above-described embodiment, the basic structure of the building of the present invention is applied to a pressurized water reactor. However, the embodiment can be applied to a boiling water reactor (BWR), and any light water reactor can be used. It may be applied to any nuclear reactor. Furthermore, in the above-described embodiment, the building is a reactor containment vessel, but it may be a general building such as a building or a tower.

11 Reactor containment vessel (structure)
DESCRIPTION OF SYMBOLS 12 Pressurized water reactor 13 Steam generator 14 Pressurizer 21 Base plate 22 Ground 23 Ground 24 Recess 31 Lower base plate 31a Upper surface part 32 Upper base plate 33 Seismic isolation device 34 Retaining wall 35 Space part 36 Base isolation structure 40 Flame protection Device 41 Slope 42 Side groove 51 Fire extinguishing device 52 Fire extinguishing pipe 61 Fire barrier 62 Blocking member 63 First block plate 64 Second block plate 71 Ventilator 72 Exhaust passage 73 Filter 74 Exhaust fan 75 Support base 76

Fire detector

81, 86

Fire wall

82, 87 Upper fire wall

82a Locking piece

83, 88

Lower fire wall

83a, 88a Connecting piece 87a Horizontal shaft 87b Wheel 91 Drainage 92 Discharge device 93 Drain hole 94 Drain pipe 95 Drain pump 96 On-off valve S Space part

Claims

Lower base version provided on the ground,
An upper foundation plate provided above the lower foundation plate and on which a structure is installed;
A seismic isolation device having a seismic isolation structure arranged in a horizontal direction at a predetermined interval between the upper base version and the lower base version;
A slope provided on the upper surface of the lower base plate and inclined downward toward the outside;
A side groove provided outside the slope;
The building characterized by having.
The building according to claim 1, wherein the slope is provided outside the seismic isolation device.
A plurality of catchment basins are provided on the upper surface of the lower base plate at predetermined intervals in the circumferential direction, the side grooves communicate with the plurality of catchment basins, and the slope is downward toward the plurality of catchment basins The building according to claim 1 or 2, wherein the building is inclined.
The building according to claim 3, wherein the drainage basin is provided with a drainage device.
The building according to any one of claims 1 to 4, further comprising a fire extinguishing device that supplies a fire extinguishing agent toward the side groove.
The building according to any one of claims 1 to 5, wherein a fire wall is provided between the upper base plate and the lower base plate so as to surround the plurality of seismic isolation structures from outside. .
The building according to claim 6, wherein the fire wall has flexibility.
The fire wall includes an upper fire wall fixed to a lower portion of the upper base plate, and a lower fire wall fixed to an upper portion of the lower base plate, and includes a lower portion of the upper fire wall and a lower fire wall. The building according to claim 6, wherein upper portions are connected to each other so as to be relatively movable in a vertical direction and a horizontal direction.
A retaining wall surrounding the periphery of the upper foundation plate is provided on the upper surface of the lower foundation plate, and a closing member movable in the horizontal direction is provided between the upper surface of the upper foundation plate and the upper surface of the retaining wall. The building according to any one of claims 1 to 8, wherein the building is characterized.
The building according to claim 9, further comprising a ventilation device for discharging air in a space between the upper base plate and the lower base plate.
The ventilation device includes an exhaust passage that penetrates the retaining wall inward and outward, a filter that is provided in the exhaust passage and collects harmful substances, and an exhaust fan that supplies air in the space to the exhaust passage. The building according to claim 10.
The building according to any one of claims 1 to 11, wherein a fire detector for detecting a fire in a space between the upper base plate and the lower base plate is provided.