Nuclear building

Abstract

By improving the space efficiency of floors where safety-critical equipment is installed, the number of considerations related to the installation of safety-critical equipment can be reduced. [Solution] A nuclear building 10 that houses various equipment 1 including safety-critical equipment, having a floor 12 on which the various equipment 1 including safety-critical equipment is installed, and a wall 11 on which vibrations are generated by the direct impact of a flying object 2, wherein the floor 12 is positioned opposite and spaced apart from the inner surface 11A of the wall 11.

Description

Technical Field

[0001] Embodiments of the present invention relate to nuclear power buildings.

Background Art

[0002] When a flying object such as an aircraft collides with a building, a large impact vibration occurs. In a nuclear power plant, it is necessary to prevent important safety facilities from losing their functions due to impact vibration. Therefore, conventionally, measures such as not installing facilities at positions where large vibrations occur or installing multiple facilities to provide redundancy have been taken.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When protective measures are taken on the equipment side for safety-important facilities as in the prior art, considerations arise in the installation study of the equipment due to restrictions on the installation position of the equipment and an increase in the amount of the equipment. Therefore, instead of protective measures on the equipment side, measures based on the building structure are considered.

[0005] Patent Document 1 describes a nuclear reactor building in which both the nuclear reactor building and the nuclear reactor containment vessel are structurally separated above the ground surface as a measure against vibrations including the fall of a flying object. Thereby, the influence of the impact of an aircraft fall is reduced on the floor near the nuclear reactor containment vessel. However, in the technology described in Patent Document 1, vibration reduction is not considered in the rooms on the outer wall side of the nuclear reactor building and the basement when a collision with the outer wall is assumed.

[0006] Embodiments of the present invention have been made in consideration of the above circumstances, and aim to provide a nuclear power plant building that can reduce considerations regarding the installation of safety-critical equipment by improving the space efficiency of the floor where safety-critical equipment is installed. [Means for solving the problem]

[0007] The nuclear building in the embodiment of the present invention is a nuclear building that houses various equipment including safety-important equipment, and is characterized in that it has a floor on which the various equipment is installed and a wall on which vibrations are generated by the direct impact of a projectile, and the floor is arranged opposite and spaced apart from the inner surface of the wall. [Effects of the Invention]

[0008] According to embodiments of the present invention, by improving the space efficiency of the floor where safety-critical equipment is installed, the considerations related to the installation of safety-critical equipment can be reduced. [Brief explanation of the drawing]

[0009] [Figure 1] A longitudinal cross-sectional view schematically showing the configuration of the nuclear building according to the first embodiment. [Figure 2] A longitudinal cross-sectional view schematically showing the configuration of the nuclear building according to the second embodiment. [Figure 3] Figure 2 is a floor plan showing the nuclear power plant building. [Figure 4] A cross-sectional view along the line IV-IV in Figure 3. [Figure 5] A cross-sectional view along the VV line in Figure 3. [Figure 6] A plan view schematically showing the configuration of the nuclear power plant building according to the third embodiment. [Figure 7] Figure 6 is a vertical cross-sectional view showing the nuclear power plant building. [Modes for carrying out the invention]

[0010] Hereinafter, embodiments for carrying out the present invention will be described based on the drawings. [A] First embodiment (Figure 1) Figure 1 is a longitudinal cross-sectional view schematically showing the configuration of a nuclear building according to the first embodiment. The nuclear building 10 shown in Figure 1 houses various facilities 1, including safety-critical equipment, and is composed of walls 11, floors 12, floor beams 13, and support columns 14 as support members.

[0011] Wall 11 is a wall that generates vibrations when a flying object 2, such as an aircraft, directly collides with it, and it forms the outer shell of the nuclear building 10.

[0012] The floor 12 is where various facilities 1, including safety-critical equipment, are installed, and is supported by multiple floor beams 13. The support columns 14 support the floor 12 via the floor beams 13 at a predetermined distance L from the end face 12A on the wall 11 side of the floor 12, thereby avoiding a cantilevered state of the floor 12. These support columns 14 are erected on the ground 15 or floor material, but are not limited to column material and may be wall material as well.

[0013] Furthermore, the floor 12 is positioned such that its end face 12A faces the inner surface 11A of the wall 11 on the floor 12 side, and is horizontally spaced apart from this inner surface 11A by a gap δ1. As a result, vibrations generated by the direct collision of the flying object 2 with the wall 11 are suppressed from propagating even at positions close to the wall 11 on the floor 12.

[0014] As configured as described above, this first embodiment provides the following effect (1). (1) The floor 12 on which various equipment 1, including safety-critical equipment, is installed is positioned opposite the inner surface 11A of the wall 11, where vibrations are generated by the direct collision of the flying object 2, and separated by a gap δ1. Therefore, vibrations are reduced even near the wall 11. As a result, it becomes possible to install various equipment 1 near the wall 11 on the floor 12, thereby improving the space efficiency of the floor 12. As a result, considerations regarding the installation of various equipment 1, including safety-critical equipment, such as constraints on the installation location of various equipment 1 and increases in the volume of various equipment 1, can be reduced. At the same time, the costs required for these installation considerations can also be reduced.

[0015] [B]Second Embodiment (Figs. 2 to 5) Fig. 2 is a longitudinal sectional view schematically showing the configuration of the nuclear power building according to the second embodiment. For the parts similar to those in the first embodiment in this second embodiment, the same reference numerals as those in the first embodiment are used to simplify the description or omit it.

[0016] The difference between the nuclear power building 20 of this second embodiment and the first embodiment is that a protrusion 22 is provided on a wall 21 that functions in the same way as the wall 11, and this protrusion 22 supports the floor beam 13 directly or via vibration absorption means 23.

[0017] That is, the wall 21 is a wall on which vibrations are generated when the flying object 2 directly collides, and constitutes the outer shell of the nuclear power building 20. A gap δ1 is set by horizontally separating the inner surface 21A on the floor 12 side of this wall 21 and the end surface 12A of the floor 12, and the propagation of vibrations caused by the direct collision of the flying object 2 from the wall 21 to the floor 12 is suppressed.

[0018] Also, a protrusion 22 protrudes from the inner surface 21A of the wall 21 toward the floor 12, and the floor beam 13 is supported by this protrusion 22 directly or via vibration absorption means 23, avoiding the cantilever state of the floor 12. Therefore, in this second embodiment, the column 14 of the first embodiment is omitted.

[0019] The vibration absorption means 23 is, for example, the metal fitting 24 shown in Fig. 4 and, for example, the compression coil spring 25 shown in Fig. 5. As shown in Fig. 4, when the metal fitting 24 supports the floor beam 13 on the protrusion 22, in the vertical direction, the floor beam 13 is fixed to the protrusion 22, and in the horizontal direction, by setting a gap t, the floor beam 13 can move relative to the protrusion 22 within the range of the gap t. Thus, among the vibrations generated in the wall 21 due to the direct collision of the flying object 2, the horizontal vibration component is absorbed, and the propagation of this vibration component to the floor beam 13 and the floor 12 is suppressed.

[0020] As shown in Figure 5, the compression coil spring 25 is interposed between the floor beam 13 and the protruding portion 22 when the floor beam 13 is supported by the protruding portion 22, allowing the floor beam 13 to move relative to the protruding portion 22 in both the vertical and horizontal directions. As a result, vibrations generated in the wall 21 due to the direct collision of the flying object 2 are absorbed in both the vertical and horizontal directions, suppressing their propagation to the floor beam 13 and the floor 12.

[0021] Here, instead of the metal fitting 24, a high-damping laminated rubber or a laminated rubber with a lead plug may be used to absorb the horizontal vibration component. Alternatively, instead of the compression coil spring 25, one or more vibration-isolating oil dampers or lead dampers may be used to absorb the vertical and horizontal vibration components.

[0022] As configured as described above, this second embodiment provides the same effects as the first embodiment (1), as well as the following effect (2).

[0023] (2) The floor beams 13 that support the floor 12 are supported by projections 22 that protrude from the wall 21, and vibration absorbing means 23 are interposed between the floor beams 13 and the projections 22 to absorb vibrations transmitted from the projections 22 to the floor beams 13. Therefore, even when the floor 12 is supported by the projections 22 of the wall 21 via the floor beams 13, vibrations from the wall 21 are absorbed by the vibration absorbing means 23, thereby reducing vibrations near the wall 21 on the floor 12. As a result, various equipment 1, including safety-critical equipment, can be installed more safely near the wall 21 on the floor 12.

[0024] [C] Third embodiment (Figures 6 and 7) Figure 6 is a schematic plan view showing the configuration of the nuclear building according to the third embodiment. In this third embodiment, parts that are the same as those in the first and second embodiments are denoted by the same reference numerals as in the first and second embodiments, thereby simplifying or omitting their explanation.

[0025] The difference between the nuclear building 30 of this third embodiment and the first and second embodiments is that it has a first wall 31 upon which a projectile 2 directly collides and generates vibrations, a second wall 32 structurally connected to the first wall 31 at a predetermined angle θ, and a floor 12 on which various equipment 1, including safety-critical equipment, is installed, and the floor 12 is supported by a projection 33 provided on the second wall 32 via a floor beam 13, or via the floor beam 13 and vibration absorbing means 23.

[0026] The first wall 31 is configured similarly to the wall 11 of the first embodiment. The second wall 32 is structurally integrated with the first wall 31 at a predetermined angle θ (for example, θ=90°) between 0<θ<180°, and is a wall in which the flying object 2 is unlikely to collide.

[0027] The floor 12 is positioned such that its end face 12A on the first wall 31 side faces the inner surface 31A of the first wall 31 on the floor 12 side, and is horizontally spaced apart from this inner surface 31A by a gap δ1. Furthermore, the floor 12 is positioned such that its side face 12B on the second wall 32 side faces the inner surface 32A of the second wall 32 on the floor 12 side, and is horizontally spaced apart from this inner surface 32A by a gap δ2. Here, the gap δ2 may be the same value as the gap δ1, or it may be a different value.

[0028] The protruding portion 33 is formed to protrude from the inner surface 32A of the second wall 32 toward the floor 12, and supports the floor beam 13 that supports the floor 12 either directly or via the vibration absorbing means 23.

[0029] As configured as described above, this third embodiment provides the same effects as the first and second embodiments (1) and (2), as well as the following effect (3).

[0030] (3) The floor 12 is spaced apart from the first wall 31 by a gap δ1 and from the second wall 32 by a gap δ2, and is supported not by the first wall 31 to which the flying object 2 directly collides, but by a projection 33 provided on the second wall 32 which is connected to the first wall 31. For this reason, the propagation of vibrations to the floor 12 that occur when the flying object 2 directly collides with the first wall 31 is suppressed more than in the second embodiment, especially when a vibration absorbing means 23 is interposed between the projection 33 and the floor beam 13, and as a result, the vibration of the floor 12 can be reduced more than in the second embodiment.

[0031] Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be carried out in various other forms, and various omissions, substitutions, modifications, and combinations can be made without departing from the spirit of the invention, and such substitutions, modifications, and combinations are included in the scope and spirit of the invention, as well as in the claims and their equivalents. [Explanation of Symbols]

[0032] 1... Various equipment including safety-critical equipment, 2... Projectile, 10... Nuclear building, 11... Wall, 11A... Inner surface, 12... Floor, 12A... End face, 14... Support column (support member), 20... Nuclear building, 21... Wall, 22... Protrusion, 23... Vibration absorbing means, 30... Nuclear building, 31... First wall, 31A... Inner surface, 32... Second wall, 32A... Inner surface, 33... Protrusion, L... Determined distance, δ1, δ2... Gap, θ... Determined angle.

Claims

1. A nuclear building that houses various facilities, including safety-critical equipment, The floor on which the aforementioned various equipment is installed, It has a wall that generates vibrations due to the direct impact of a flying object, The nuclear building is characterized in that the floor is arranged opposite and spaced apart from the inner surface of the wall.

2. The nuclear building according to claim 1, characterized in that the floor is supported by a support member at a predetermined distance from the end face on the wall side.

3. The nuclear building according to claim 1, characterized in that the floor is supported by a projection provided in the wall.

4. A nuclear building that houses various facilities, including safety-critical equipment, The floor on which the aforementioned various equipment is installed, The first wall generates vibrations due to the direct impact of the flying object, It has a second wall connected to the first wall at a predetermined angle, which makes it unlikely that the projectile will collide with it, The nuclear building is characterized in that the floor is arranged opposite and spaced apart from the inner surfaces of the first wall and the second wall, and is supported by a projection provided on the second wall.

5. The nuclear building according to claim 3 or 4, characterized in that vibration absorbing means for absorbing vibrations transmitted from the protrusion to the floor is provided between the floor and the protrusion.

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