JP2011252800A - Nuclear reactor building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nuclear reactor building which withstands an impact from external flying objects and improves the earthquake resistance while maintaining safety function and soundness.SOLUTION: The nuclear reactor building houses an apparatus of a safety system and systems therein and incudes a building structure 2 constructed with a wall thickness which withstands the impact due to collision of the external flying objects, and a roof structure 3 constructed above this building structure 2. The building structure 2 and the roof structure 3 are constituted separated from each other and provided with basic structures 3a independent from each other.

Description

  The present invention relates to a reactor building having a safety function in a nuclear power plant.

  In general, a reactor building having a safety function as described above needs to be protected by a safety function capable of shutting down the reactor against a threat of collision with an external projectile such as an aircraft. For this reason, selection of sites (sites, sites) that do not need to take into account the aircraft's fall has been a countermeasure.

  However, due to the increasing social demand for terrorism after the 9/11 American terrorist incident (9.11), the nuclear reactor building has a protective function against collisions of external flying objects such as aircraft in the newly established nuclear power plant. Is required.

  In general, when protecting the outer wall of a reactor building, the building is covered with reinforced concrete with a thickness of about 2m, so that safety systems and equipment installed in this building can collide with external flying objects such as aircraft. Protects from

  However, the thick reinforced concrete outer wall has a heavy weight in the upper part of the building, which makes the structure very disadvantageous from the viewpoint of ensuring stability during an earthquake. In view of such a situation, a technique is known in which a roof portion of a conventional nuclear power plant building is provided with an anti-shock and vibration control function that copes with external flying objects (for example, see Patent Document 1).

  In addition, as a means to prevent external flying objects such as aircraft from directly colliding with the building, the surroundings of the building are surrounded by structures such as towers and wind turbines for wind power generation, and external flying objects such as aircraft are surrounded by these structures. There is a technique in which an external projectile such as an aircraft does not enter and collide with the building due to the collision (see, for example, Patent Documents 2 and 3).

  These technologies are based on the premise that an external projectile such as an aircraft enters with a certain angle of elevation with respect to the collision target. Therefore, a sufficient height is required at the installation position of the tower or wind turbine for wind power generation. By securing this, it is said that it becomes possible to protect the object to be protected. However, these technologies are not compatible with military aircraft with steep elevation angles such as fighters and external flying objects.

JP 2007-297854 A US Patent Application Publication No. 2003/0127636 US Patent Application Publication No. 2005/0042100

  By the way, even when an external projectile such as an aircraft collides with a nuclear power plant, it is necessary to maintain the functions of the reactor and the cooling system in order to stop the reactor safely.

  The lower part of the operating floor of the reactor building is surrounded by a relatively strong concrete outer wall, and although it has high protection against external flying objects such as aircraft, the operating floor and its upper wall are thin. The protection performance is low, and there is a concern of penetration when an external projectile such as an aircraft collides. In addition, when an aircraft collides with an operating floor and penetrates a wall, there is a problem that a fire caused by aviation fuel spreads to the lower floor through a staircase, an elevator shaft, or an opening.

  And in the conventional nuclear power plant mentioned above, it is common to make it the steel structure from the objective of reducing the weight of the roof structure of a building, and making an earthquake response value small. In the reactor building, safety equipment and systems are housed below the operating floor, and a lighter wall structure is insufficient to protect these safety functions. In particular, in order to combat recent aircraft drop accidents and terrorism, a reinforced concrete structure having a thickness of about 2 m is required as a structure having sufficient strength to withstand impacts.

  However, the roof structure of a thick concrete building with a thickness of 2 m is contrary to the idea of reducing the weight of the upper structure in order to improve the earthquake resistance as described above. There was a problem of making it worse.

  In the reactor building, safety equipment and systems are stored in the lower part of the operating floor as a boundary, and there are no such parts in the upper part. Therefore, in order to shut down the reactor safely, it is necessary to protect the safety equipment and system below the operating floor.

  The present invention has been made in consideration of the above circumstances, and an object thereof is to provide a nuclear reactor building that can withstand impacts from external flying objects and has improved earthquake resistance while maintaining safety functions and soundness. And

  In order to achieve the above object, a nuclear reactor building according to the present invention contains a safety system device and system, and a building structure constructed to have a wall thickness that can withstand an impact caused by an impact of an external flying object, and the building structure. The building structure and the roof structure are separated from each other and have independent foundation structures.

  According to the present invention, the building structure and the roof structure are separated from each other, and have an independent foundation structure so that they can withstand impacts from external flying objects and maintain safety functions and soundness. However, the earthquake resistance can be improved.

It is an elevation sectional view showing a schematic structure of a first embodiment of a reactor building according to the present invention. It is an elevation sectional view showing a schematic structure of a 2nd embodiment of a reactor building concerning the present invention. It is an elevation sectional view showing a schematic structure of a 3rd embodiment of a reactor building concerning the present invention. It is an elevation sectional view showing a schematic structure of a 4th embodiment of a reactor building concerning the present invention. It is an elevation sectional view showing a schematic structure of a 5th embodiment of a reactor building concerning the present invention. It is an elevation sectional view showing a schematic structure of a 6th embodiment of a reactor building concerning the present invention. It is an elevation sectional view showing a schematic structure of a 7th embodiment of a reactor building concerning the present invention. It is an elevation sectional view showing a schematic structure of an eighth embodiment of a reactor building according to the present invention.

  Below, each embodiment of a reactor building concerning the present invention is described with reference to drawings.

(First embodiment)
FIG. 1 is an elevational sectional view showing a schematic configuration of a first embodiment of a reactor building according to the present invention.

  As shown in FIG. 1, the reactor building 1 of the present embodiment is a building structure constructed so that safety equipment and systems capable of shutting down the reactor are housed and the upper surface is an operating floor 2a. 2 and the roof structure 3 constructed so as to cover the building structure 2 are separated from each other, and each of the building structure 2 and the roof structure 3 has an independent foundation structure. .

  Specifically, a space portion 4 is formed between the ground surface 2 b and the roof structure 3 around the building structure 2. The building structure 2 is embedded in the ground surface 2b to a predetermined height, and the embedded portion serves as a support base. Further, the building structure 2 is constructed of a reinforced concrete having a wall thickness that can protect the outer wall even when an external projectile such as an aircraft collides, that is, can withstand an impact caused by the collision of the external projectile. Furthermore, the building structure 2 is provided with a passage 5 such as a staircase, an elevator shaft, and an equipment entrance.

  On the other hand, the roof structure 3 has a steel structure in order to reduce the weight and reduce the seismic response value. In addition, the roof structure 3 has a support base portion 3 a that is independent of the building structure 2, and an overhead crane 6 is mounted on the ceiling portion. The overhead crane 6 is used to carry in and out the equipment, fuel, and the like installed on the ground surface 2b through the space 4 to and from the operating floor 2a.

  Next, the operation of this embodiment will be described.

  In the present embodiment, the building structure 2 is constructed with a wall thickness that can sufficiently withstand the impact caused by the collision of an external projectile such as an aircraft, so that even if an external projectile such as an aircraft collides with the reactor building 1, An event that impairs the safety function of the reactor building 1 is not caused, and the amount of the structure as a whole is reduced as compared with the reactor building in which the building structure 2 and the roof structure 3 are integrally constructed as in the past. Is possible. And by the height of the reactor building 1 becoming low, the center of gravity becomes lower than before and the reactor building 1 with improved earthquake resistance can be constructed.

  Moreover, in this embodiment, since the roof structure 3 is equipped with the overhead crane 6, the space portion 4 between the building structure 2 and the roof structure 3 is used to move the roof structure 3 onto the operating floor 2a. Since equipment and fuel can be carried in and out, it is not necessary to form an opening for carrying in and out equipment and fuel on the operating floor 2a. As a result, even if a fire occurs due to collision of an external projectile such as an aircraft and aircraft fuel, the fire can be prevented from entering the building structure 2 having a safety function.

  Furthermore, in this embodiment, since each of the building structure 2 and the roof structure 3 has an independent foundation structure, the load of the roof structure 3 may be locally applied to the bottom surface of the building structure 2. Moreover, since it becomes possible to reduce the weight of the high part of a building, earthquake resistance can be improved.

  As described above, according to the present embodiment, the building structure 2 that stores safety equipment and systems and is constructed to have a wall thickness that can withstand the impact caused by the collision of an external flying object such as an aircraft, and the building structure 2 Since the roof structure 3 constructed so as to cover the upper side is separated from each other, and the building structure 2 and the roof structure 3 are independent from each other, the impact from external flying objects such as aircraft It is possible to improve the earthquake resistance while enduring and maintaining the safety function and soundness.

(Second Embodiment)
FIG. 2 is an elevational sectional view showing a schematic configuration of the second embodiment of the reactor building according to the present invention.

  In addition, the same code | symbol is attached | subjected to the part which is the same as that of the said 1st Embodiment, or respond | corresponds, the overlapping description is abbreviate | omitted, and only a different structure and effect are demonstrated. The same applies to other embodiments.

  Although the roof structure 3 in the first embodiment has a flat ceiling surface, the roof structure 3A of the present embodiment shown in FIG. 2 is formed in an arch shape or a dome shape by reinforced concrete, for example. .

  Thus, according to this embodiment, since the roof structure 3A is formed in an arch shape or a dome shape, the structure can be maintained by its own weight, and thus the amount of the structure of the roof structure 3A is reduced. Can be achieved.

(Third embodiment)
FIG. 3 is an elevational sectional view showing a schematic configuration of a third embodiment of the reactor building according to the present invention.

  The building structure 2 in the first embodiment and the second embodiment is constructed of reinforced concrete. However, in the building structure 2A of this embodiment, at least one of the outer wall and the roof is constructed of steel plate concrete as shown in FIG. ing. In this steel plate concrete, a steel plate is bonded to at least one side (inner surface) of the concrete.

  Thus, according to this embodiment, since the building structure 2A is constructed of steel plate concrete, it can withstand the collision of external flying objects such as aircraft. In particular, in the case of a steel plate concrete structure, it has a safety function that is housed inside the building structure 2A by suppressing the peeling of concrete caused by the impact caused by the impact of flying objects by the steel plate on the inner surface of the building structure 2A. It is possible to prevent secondary damage to the system and equipment due to the collision of the peeled concrete.

  In addition, in the case of a structure made of steel-concrete, the wall thickness can be made thinner than that of a structure made of reinforced concrete. Thereby, it becomes possible to reduce the amount of structures of the reactor building 1 and to improve the tolerance at the time of an earthquake.

(Fourth embodiment)
FIG. 4 is an elevational sectional view showing a schematic configuration of a fourth embodiment of a reactor building according to the present invention.

  As shown in FIG. 4, in this embodiment, a seismic isolation device 7 is attached to the support base portion 3 a of the roof structure 3 in the first embodiment shown in FIG. 1. In this embodiment, the seismic isolation device 7 is attached to the support base portion 3a, so that the seismic force from the outside is not transmitted to the roof structure 3.

  As described above, according to the present embodiment, the roof structure 3 includes the seismic isolation device 7, so that it is possible to reduce the input of the response due to the seismic force from the outside. Thereby, while being able to improve the earthquake resistance of the roof structure 3, the amount of structures of the roof structure 3 can be reduced.

(Fifth embodiment)
FIG. 5 is an elevational sectional view showing a schematic configuration of a fifth embodiment of a reactor building according to the present invention.

  As shown in FIG. 5, in the present embodiment, a plurality of vibration control devices 8 are attached to predetermined positions of the roof structure 3. Specifically, the vibration control device 8 is attached to each column portion 3b of the roof structure 3 and is attached to a predetermined position of the roof portion 3c. The vibration control device 8 is composed of, for example, laminated rubber and vibration control dampers such as a fluid dynamic pressure damper, an oil damper, and a shock absorber. Therefore, the seismic force from the outside can be controlled by the seismic control device 8 by providing the seismic control device 8 on the column portion 3b and the roof portion 3c of the roof structure 3.

  As described above, according to the present embodiment, the roof structure 3 includes the vibration control device 8, so that the stress on the input of the roof structure 3 due to the seismic force can be reduced. Thereby, while being able to improve the earthquake resistance of the roof structure 3, the amount of structures of the roof structure 3 can be reduced.

(Sixth embodiment)
FIG. 6 is an elevational sectional view showing a schematic configuration of a sixth embodiment of a reactor building according to the present invention.

  As shown in FIG. 6, in the present embodiment, a fuel pool 9 that is sufficiently filled with water is installed in the upper part of the building structure 2.

  As described above, according to the present embodiment, the water in the fuel pool 9 functions as a buffer material against debris generated by the collision of an aircraft or an external flying object. As a result, secondary damage caused by the collision of debris to the system and equipment having safety functions housed in the reactor building 1, the fuel and fuel rack housed in the fuel pool 9, and the like will occur. Can be prevented.

(Seventh embodiment)
FIG. 7 is an elevational sectional view showing a schematic configuration of the seventh embodiment of the reactor building according to the present invention.

  As shown in FIG. 7, in the present embodiment, the gantry crane (gate) having a support portion from the ground surface 2 b is independent from other structures in the space portion 4 between the building structure 2 and the roof structure 3. Type crane) 10 is installed so as to straddle the building structure 2.

  Thus, according to this embodiment, instead of attaching the overhead crane to the roof structure 3, the gantry crane 10 having an independent support portion is installed so as to straddle the building structure 2. By reducing this load, the earthquake resistance of the roof structure 3 can be improved.

(Eighth embodiment)
FIG. 8 is an elevational sectional view showing a schematic configuration of an eighth embodiment of a reactor building according to the present invention.

  As shown in FIG. 8, in this embodiment, a gantry crane (gate crane) 11 is installed on the operating floor 2 a of the building structure 2.

  As described above, according to this embodiment, instead of providing the overhead crane 6 on the roof structure 3, the gantry crane 11 is installed on the operating floor 2 a, thereby reducing the load applied to the roof structure 3. The earthquake resistance of the structure 3 can be improved.

  The present invention is not limited to the above embodiments, and various modifications can be made. For example, in the first to eighth embodiments, air conditioning equipment or an emergency gas treatment system may be provided separately for the building structure 2 and the roof structure 3.

  Further, if the first embodiment is a basic structure and at least one of the other embodiments is appropriately combined, a synergistic effect can be obtained.

DESCRIPTION OF SYMBOLS 1 ... Reactor building 2 ... Building structure 2a ... Operating floor 2b ... Ground surface 3 ... Roof structure 3a ... Supporting base part 4 ... Space part 5 ... Passage 6 ... Overhead crane 7 ... Seismic isolation device 8 ... Damping device 9 ... Fuel pool 10 ... Gantry crane 11 ... Gantry crane

Claims (8)

It has a building structure that houses safety equipment and systems and is built to a wall thickness that can withstand the impact caused by collisions with external flying objects, and a roof structure that is built above the building structure.
A reactor building characterized in that the building structure and the roof structure are separated from each other and have independent foundation structures.   The reactor building according to claim 1, wherein the roof structure is constructed in a dome shape or an arch shape.   The reactor building according to claim 1, wherein at least one of the outer wall and the roof of the building structure is constructed of steel plate concrete.   The reactor building according to any one of claims 1 to 3, wherein a seismic isolation device is attached to a foundation structure portion of the roof structure.   The reactor building according to any one of claims 1 to 4, wherein a vibration control device is attached to a predetermined position of the roof structure.   The nuclear reactor building according to claim 1, wherein the building structure is provided with a fuel pool at an upper portion thereof.   The space part is formed between the said building structure and the said roof structure, and the portal crane was installed in this space part so that the said building structure might be straddled. The reactor building according to one item.   The nuclear reactor building according to any one of claims 1 to 6, wherein a portal crane is installed on an upper surface of the building structure.

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