JP3462911B2 - Reactor building - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nuclear reactor building used in a fast reactor, and more particularly to a small reflector fast reactor which controls the reactivity of the reactor core by using a neutron reflector.

[0002]

2. Description of the Prior Art A reactor vessel of a small fast reactor of a reflector control type has a core made of nuclear fuel inside and an annular neutron reflector for adjusting the amount of neutron leakage to the surroundings and the reactor vessel. The main body and the in-reactor shield for reducing neutrons irradiated to the outer space of the reactor vessel are housed concentrically, and an annular electromagnetic pump and an intermediate heat exchanger are housed above the in-reactor shield. Therefore, there is a feature that it becomes a small diameter long container.

The reactor building for accommodating the reactor vessel is generally limited to the necessary minimum size from the viewpoint of improving the economical efficiency of the plant. The reactor vessel for accommodating the reactor vessel of the small fast reactor is generally used. The room is a pit-shaped room with a small inner diameter and a high indoor height due to the geometrical features of the reactor vessel.

Heat is transferred from the primary coolant for cooling the core to the secondary cooling system equipment room adjacent to the reactor vessel room in the reactor building by the intermediate heat exchanger provided in the reactor vessel. The steam generator that generates steam using the generated secondary coolant as a heat source and the dump tank for storing the secondary coolant below are stored, and the reactor building of the small fast reactor is entirely flat. It has a feature that it has a building shape that is longer in the height direction than dimensions.

FIG. 8 shows a reactor and its peripheral structure in a reactor building that houses a single reactor or a plurality of reactors in a conventional small fast reactor. A reactor building 2 for accommodating a small-diameter long reactor vessel 1 is entirely made of reinforced concrete, and has a reactor vessel chamber 3 for accommodating the main body of the reactor vessel 1 therein and a reactor vessel 1
And a furnace upper chamber for accommodating the storage dome 4 which encloses the plug and the reflector driving device.

A step portion is formed at the boundary between the reactor vessel chamber 3 and the reactor upper chamber 5, and this step portion constitutes a reactor support portion 6 constructed integrally with the reactor building 2, and an atomic force is provided above the reactor support portion 6. A reactor support ring 8 is fixed via a reactor support ring anchor bolt 7 to support the reactor vessel 1 in a vertically expandable and contractible manner. The reactor support ring is provided with a flange (not shown) equipped with a double O-ring to fix the containment dome 4.

A reactor vessel air-cooling cylinder 9 is disposed around the reactor vessel 1 housed in the reactor vessel chamber 3 and surrounds the outer peripheral wall of the reactor vessel 1 with a gap therebetween. Is connected to the upper portion of the reactor vessel 1, and the lower end is opened to the lower space of the reactor vessel chamber 3. The furnace vessel air-cooling cylinder 9 has a plurality of furnace vessel air-cooling cylinders fixed to an embedded metal article 10 embedded in the upper part of the wall body portion of the furnace vessel chamber 3 via a furnace vessel air-cooling tube support flange 12 provided on the upper part thereof. It is supported on the cylinder support structure 11.

In the middle part of the furnace container chamber 3, a furnace container air cooling cylinder 9 is provided.
An annular shield 13 is arranged on the outer peripheral portion of and is fixed to the embedded metal article 10 embedded in the wall of the furnace chamber 3. The shield 13 has a plurality of small-diameter through holes that form an air flow path and are formed in the vertical direction.

Inside the concrete wall of the reactor building 2, there are air supply holes 14 formed in the straight body of the reactor support ring 8.
An air supply duct 15 that communicates with the air supply duct 15 and a through sleeve 18 that encloses an exhaust duct 17 that communicates with the reactor vessel air-cooling cylinder 9 via an exhaust bellows 16 are formed at the ends. This penetration sleeve 18
A heat insulating material 19 is disposed in the gap between the exhaust duct 17 and the exhaust duct 17, and closing plates 20 for closing the gap are set at both ends of the through sleeve 18.

As described above, the concrete structure of the reactor vessel support portion 6 and the reactor support ring 8 are formed by the air flow path formed by the air supply duct 15, the reactor vessel air-cooling cylinder 9 and the exhaust duct 17. The structure is such that the high temperature air around the reactor vessel 1 can be directly discharged to the outside by cooling with the low temperature air and without exposing the structures such as the reactor vessel supporting portion 6 to the high temperature air.

The construction procedure in the peripheral portion of the nuclear reactor of the small fast reactor thus constructed will be described with reference to FIGS. 9 (a) to 9 (c) and FIG. 9 (a) to 9 (c) show a construction procedure of a skeleton construction work in a peripheral portion of a nuclear reactor in a conventional nuclear reactor building.

FIG. 9 (a) shows the state of the initial stage of the building construction work of the reactor building. That is, a reinforced concrete furnace container chamber wall 23 that forms the reactor container chamber 3 from the upper surface of the base mat 22 of the reinforced concrete reactor building constructed on the bedrock 21 is constructed upward. Temporary scaffolds 24 for construction are provided around the furnace container chamber wall 23 and inside the furnace container chamber 3, and the scaffold 24 is a scaffold for the construction work of the furnace container chamber wall 23.

The penetration sleeve 18 and the reactor support ring anchor bolt 7 which are buried in the wall 23 of the reactor vessel chamber are installed at a stage when the construction of the wall 23 of the reactor vessel chamber has reached just below the set height of the penetration sleeve 18. It is fixed to the upper end of the furnace chamber wall 23 via a temporary support structure 25.

The temporary support structure 25 includes a through sleeve 18 and a reactor support ring anchor bolt 7 embedded in the reactor building.
Will be supported until it is embedded in concrete, and its supporting function will be lost as it is poured into the concrete, and it will be embedded in the building of the reactor building.

FIG. 9B shows the state of the middle stage of the construction of the skeleton of the reactor building, which is continued from FIG.
The wall 23 of the reactor vessel chamber is made by placing concrete up to the set height of the reactor support ring 8 so that the through sleeve
18 and the lower half of the reactor support ring anchor bolt 7 are embedded in the wall 23 of the reactor vessel chamber.

In this state, the reactor vessel support ring 8 is fixed to the upper portion of the reactor vessel chamber wall 23 through the reactor support ring anchor bolt 7, and after the reactor support ring 8 is fixed, the end portion of the air supply duct 15 is fixed. And the reactor support ring 8 are connected. The air supply duct 15 is supported by a temporary support structure 25 until it is embedded and fixed in concrete.

Further, the temporary set scaffold 24 in order to build the reactor support ring 8 and reinforced concrete intermediate floor 26 which is formed continuously to the reactor vessel support 6 in order to perform a fixing operation of the air supply duct 15 Is extended upward as the work progresses.

FIG. 9C shows the state of the final stage of the building construction work of the reactor building. The reactor support ring 6 and the air supply duct 15 are buried in the concrete by placing the concrete of the reactor vessel support 6 and the intermediate floor 26 formed above the wall 23 of the reactor chamber.

A ceiling slab provided with a hatch 28 that communicates with the furnace upper chamber 5 after the reinforced concrete furnace upper chamber wall 27 that forms the furnace upper chamber 5 is constructed above the intermediate floor 26.
29 are constructed, and the construction of the reactor building 2 is completed. The temporary scaffold 24, which is no longer needed after the skeleton construction, is dismantled and taken out of the reactor building.

FIG. 10 is a view for explaining a construction procedure of equipment setting work for the reactor vessel room and the reactor upper room after completion of the construction work of the building of the reactor building shown in FIG. 9 (c). That is, on the inner surface of the furnace container chamber wall 23 forming the furnace container chamber 3, a plurality of embedded hardware 10 embedded during the skeleton construction work are arranged. A temporary lifting facility (not shown) provided outside the reactor building 2 with a shield 13 divided so as to be able to pass through an opening 30 formed in the center of the reactor support ring 8.
Then, the temporary scaffold 31 formed in the furnace chamber 3 is used to fix it to the embedded hardware 10.

Next, an exhaust bellows 16 is connected to one end, and an exhaust duct 17 having an inner closing plate 20A and an outer closing plate 20B fixed to both ends is inserted into the through sleeve 18 from the outside of the furnace chamber 3 to close the outside. The plate 20B and the penetrating sleeve 18 are fixed. A heat insulating material 19 is previously fixed to the outer peripheral portion of the exhaust duct 17 between the inner closing plate 20A and the outer closing plate 20B.

Next, the furnace vessel air-cooling cylinder support structure 11 is fixed to the embedded metal article 10 embedded in the upper part of the inner surface of the furnace vessel chamber wall 23. The temporary scaffold 31 is recombined several times suitable for the construction in the furnace container chamber 3 described above, and after the construction in the furnace container chamber 3 is completed, the temporary scaffold 31 in the furnace container chamber 3 is disassembled and the hatch 28 immediately above is used. Carry out at temporary lifting equipment.

After the temporary scaffold 31 in the furnace container chamber 3 has been carried out, the furnace container air-cooling cylinder 9 is hung down from the hatch 28 immediately above by a temporary lifting equipment, and the furnace container air-cooling cylinder support structure 11 is attached to the furnace container. The air-cooled tube support flange 12 is fixed.

The furnace container chamber wall 23 is provided with a temporary manhole (not shown) for the worker to access the furnace container air cooling cylinder support flange 12 for fixing the furnace container air cooling cylinder 9. After the furnace container air-cooling cylinder 9 is fixed, the temporary manhole is filled with concrete and closed.

In the following construction procedure, after the furnace container air-cooling cylinder 9 is fixed, a working gondola (not shown) is lowered from the hatch 28 into the furnace container air-cooling cylinder 9, and the exhaust bellows is discharged from the inside of the furnace container air-cooling cylinder 9. 16 and the furnace container air-cooling cylinder 9 are connected.

After this, the overhead traveling crane provided on the reactor building roof constructed above the reactor building 2 is used to move the hatch 28 formed directly above the reactor upper chamber 5 to the reactor vessel 1 and the containment dome. 4 and 5 are suspended and fixed to the reactor support ring 8 respectively, and then the hatch 28 is closed.

As described above, in the construction of the small-scale fast reactor of the reflector control system up to now, the working space of the worker is sufficient because the furnace chamber is a narrow space and the work is continuous in the vertical direction. Since it is not possible to secure it, it is difficult to shorten the construction period by parallel work, and there was a problem that the construction period was prolonged even though the building scale was small.

Further, the insertion of the exhaust duct into the through sleeve can be inserted only from the outside of the furnace container chamber because the furnace container chamber is narrow, and it is necessary to secure a space for inserting the exhaust duct outside the furnace container chamber. There was a problem that the reactor building became large.

Further, since it is necessary to provide a temporary manhole for the worker in the wall of the furnace chamber to set the air-cooling tube for the furnace, the number of steps is increased and the construction period is prolonged. In addition, since the reactor vessel room is classified as an oxygen deficiency dangerous place according to the Industrial Safety and Health Act enforcement order, it is necessary to take measures to prevent oxygen deficiency such as ventilation equipment, equipment costs for deploying temporary equipment, maintenance costs, etc. There was a problem whether construction costs would rise.

Next, the structure of the part for accommodating the secondary cooling system equipment in the conventional small-scale fast reactor building will be described with reference to FIG. The entire reactor building 2 is made of reinforced concrete, and is adjacent to the reactor installation section, which is composed of a reactor vessel chamber 3 for accommodating the reactor vessel 1 and a reactor upper chamber 5 for accommodating a containment dome 4, Cooling the core by an intermediate heat exchanger (not shown) provided in the container 1
A compartment for accommodating a steam generator 49 for generating steam using the secondary coolant to which heat is transferred from the secondary coolant as a heat source is formed.

The steam generator 49 is supported by anchor bolts (not shown) on the steam generator support floor 53 formed of continuous reinforced concrete at the reactor vessel support portion 6.

A secondary cooling system upper chamber 50 accommodating the upper half of the steam generator 49 is formed above the steam generator support floor 53, and steam is generated below the steam generator support floor 53. Vessel 49
Lower chamber of the secondary cooling system that houses the lower half of the tank and the dump tank 51
52 are formed.

The secondary cooling system upper chamber 50 has a secondary cooling system pipe for circulating and transporting the secondary coolant, a water supply pipe for supplying water to the steam generator 49, and the steam generated in the steam generator 49. Steam piping and the like are provided. Inside the steam generator 49, an electromagnetic pump (not shown) for circulating the secondary coolant is provided.

A dump tank 51 is provided in the secondary cooling system lower chamber 52.
A secondary cooling system auxiliary pipe that connects the steam generator 49 and a secondary cooling system pipe (not shown) is provided. On the floor surface of the secondary cooling system lower chamber 52, a steel liner plate 57 is laid so that the leaked secondary coolant and concrete do not come into contact with each other, and between the floor surface and the liner plate 57. Liner insulation
58 are deployed.

The procedure for constructing the secondary cooling system equipment room having such a configuration will be described below. For example, the skeleton construction work for forming the secondary cooling system lower chamber 52 is performed in parallel with the skeleton construction work for the wall portion forming the reactor vessel chamber 3 on the base mat 22 of the reactor building 1. An anchor bolt for fixing the dump tank 51 and the liner plate 57 to the reactor building 2 is embedded in the base mat 22.

Before the construction of the frame of the steam generator support floor 53, the dump tank 51 is suspended in the secondary cooling system lower chamber 52 by a temporary lifting machine provided outside the reactor building 2 and the anchor bolts are installed. The dump tank 51 is fixed to the reactor building 2 via. This is because the secondary cooling system equipment room and thus the reactor building 2 are not enlarged, and the dump tank 51 is installed in the secondary cooling system lower room.
This is because the opening portion to be carried into 52 is not provided on the steam generator support floor 53.

Subsequently, after the dump tank 51 is fixed, the construction work of the skeleton of the steam generator support floor 53 and the secondary cooling system upper chamber 50 is performed. After the construction of the frame is completed, the secondary cooling system upper chamber that is continuous with the ceiling of the reactor upper chamber 5 by the overhead traveling crane equipped in the reactor building roof constructed in the upper part of the reactor building 2.
Steam generator from the secondary hatch 59 formed on the ceiling of 50
49 is suspended and the steam generator 49 is fixed to the steam generator support floor 53 via anchor bolts embedded in the steam generator support floor 53.

After the steam generator 49 is fixed, the secondary cooling system piping, the water supply piping and the steam piping are installed. In the secondary cooling system lower chamber 52, the floor liner 57 is installed and the secondary cooling system is installed. Auxiliary piping (not shown) is installed.

[0039]

As described above, in the conventional construction of the secondary cooling system facility room, the dump tank 51 is provided in the secondary cooling system lower chamber 52 during the construction of the frame of the secondary cooling system facility room. Therefore, there is a problem that the number of processes increases and the construction period becomes longer because the construction work must be carried in.

Further, since the steam generator 49 is carried in after the operation of the overhead traveling crane is started, it is necessary to wait for the construction of the reactor building roof and the installation of the overhead traveling crane, and piping work around the steam generator 49 is required. There is a problem that the construction start time in the secondary cooling system equipment room including the delay will be delayed and the construction period will be prolonged, and the problems related to the extension of the construction period of the peripheral part of the reactor and the secondary cooling system facility room are This becomes even more noticeable in small fast reactor plants that deploy multiple reactors.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a reactor building of a small fast reactor capable of significantly shortening the construction period.

[0042]

According to a first aspect of the present invention, there is provided a reactor building main body made of reinforced concrete for accommodating a reactor of a small fast reactor of a reflector control system, and a main body of the reactor building .
A furnace container chamber formed inside, a cylindrical container forming an inner wall surface of the furnace container chamber, a furnace container cooling cylinder and a shield provided inside the cylindrical container, and an upper end portion of the cylindrical container. And a plurality of stud bolts provided on the outer surfaces of the cylindrical vessel and the nuclear reactor support ring, and is provided so as to communicate with the intermediate portion of the cylindrical vessel and penetrate the wall surface of the reactor vessel chamber. exhaust duct and the having a through sleeve, an exhaust bellows inserted through the through sleeve
A heat insulating material that surrounds a side surface of the exhaust duct, and the through sleeves provided at the end surfaces of the heat insulating material and at both ends of the through sleeve.
And a closing plate that closes a gap between the exhaust duct and the exhaust duct .

Further, a second aspect of the present invention is characterized in that, in the reactor building according to the first aspect, a reactor vessel seismic anti-vibration device is provided inside the cylindrical vessel. According to a third aspect of the present invention, in the reactor building according to the first and second aspects, a female screw is provided on an upper surface of the reactor support ring,
Wherein the in this female screw equipped with a cured plate of the plate or end plate. According to a fourth aspect of the present invention, in the reactor building according to the first and second aspects, the cylindrical container is in the cylindrical container.
Multiple cylindrical parts for each internal structure of the cylindrical container
It is characterized by having .

According to a fifth aspect of the present invention, a reactor building main body made of reinforced concrete for accommodating a small-scale fast reactor reactor of reflector control system, a reactor vessel room and a reactor formed inside the reactor building main body. The upper chamber, the secondary cooling system equipment room adjacent to the furnace vessel chamber and the furnace upper room, a steel frame that can be installed in the secondary cooling system room, and a steel frame fixed to the steel frame It is characterized by comprising a steam generator and a dump tank, and a liner plate provided at a lower portion of the steel frame.

According to a sixth aspect of the present invention, there is provided a hatch arranged on a ceiling of the furnace upper chamber, a secondary system hatch arranged on a ceiling portion of the secondary cooling system equipment chamber, and the furnace upper chamber. A gantry crane traveling above, a crane gantry embedded in the body of the reactor building, and the main body of the reactor building
Reactor that is deployed in the area and surrounds the gantry crane
It is characterized by having a building roof .

[0046]

According to the first aspect of the present invention, the cylindrical container and the reactor support ring form the inner surface of the wall portion of the reactor vessel chamber when the wall portion of the reactor vessel chamber constructed integrally with the reactor building is constructed. By using it as a concrete formwork, it is possible to reduce the number of construction man-hours for building a frame. Further, since the furnace container air-cooling cylinder and the shield are fixed in the cylindrical container, it is possible to reduce the site work in the furnace container chamber.

Further, according to the second aspect of the present invention, by fixing the seismic steady rest inside the cylindrical container, the field work in the reactor container chamber when the small fast reactor is installed in the high earthquake zone is significantly reduced. can do.

According to the third aspect of the present invention, by fixing the removable curing plate on the upper surface of the reactor support ring, the structure inside the cylindrical container during the construction period is directly exposed to the construction site environment. Can be stored without. Also,
According to the fourth aspect of the present invention, the cylindrical container can be easily manufactured.

According to the fifth aspect of the present invention, the steam generator, the dump tank, the secondary cooling system piping and the like are fixed and integrated to the steel frame to be installed in the secondary cooling system facility room in the reactor building. As a result, it is possible to significantly reduce the on-site work in the secondary system equipment room, and it is possible to significantly reduce the construction period.

Further, according to the sixth aspect of the present invention, the cylindrical container forming the reactor container chamber, the reactor container installed in the reactor container chamber and the steel pedestal can be easily hung down, and the construction period can be greatly shortened. At the same time, it is possible to reduce the number of temporary lifting machines.

[0051]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the reactor building according to the present invention will be described with reference to FIGS. FIG. 1 is a view showing a peripheral portion of a nuclear reactor of a small fast reactor building, and reference numeral 1 in FIG. 1 indicates a reflector control type reactor vessel. The reactor building main body 2 for accommodating the small-diameter long reactor container 1 is entirely made of reinforced concrete, and has a reactor container chamber 3 for accommodating the main body of the reactor container 1 and a reactor upper chamber for accommodating the storage dome 4. 5 is formed.

A step portion is formed at the boundary between the reactor vessel chamber 3 and the reactor upper chamber 5, and this step portion constitutes a reactor vessel supporting portion 6 constructed integrally with the reactor building. Reactor vessel support 6
A nuclear reactor support ring 8 is provided on the upper part of the above to support the nuclear reactor vessel 1 in a vertically expandable and contractible manner. Although not shown, the reactor support ring 8 is provided with a flange having a double O-ring to fix the storage dome 4.

The inner peripheral wall surface of the furnace container chamber 3 is formed by a cylindrical container 32 having a cylindrical shape. The upper end of this cylindrical container 32 is connected to the lower end of the reactor support ring 8, and the lower end is connected to a flat plate having a cylindrical container lower flange 33 on the outer peripheral portion forming the floor of the reactor container chamber 3. There is.

A reactor vessel air-cooling cylinder 9 is arranged around the reactor vessel 1 housed in the reactor vessel chamber 3 and surrounds the reactor vessel 1 with a space therebetween. It is connected to the furnace container 1, and the lower end is opened to the lower space of the furnace container chamber 3. The furnace container air-cooling cylinder 9 is supported by a furnace container air-cooling cylinder support structure 11 fixed to the upper part of the cylindrical container 32.

In the middle part of the furnace container chamber 3, a furnace container air cooling cylinder 9 is provided.
An annular shield 13 is disposed on the outer peripheral portion of the and is fixed to the cylindrical container 32. The shield 13 has a plurality of small-diameter through holes that form an air flow path and are formed in the vertical direction.

Inside the concrete wall of the main body 2 of the reactor building, there are air supply holes formed in the straight body of the reactor support ring 8.
An air supply duct 15 communicating with 14 and a penetrating sleeve 18 including an exhaust duct 17 communicating with the furnace air-cooling tube 9 via an exhaust bellows 16 are formed at the ends. This penetration sleeve
A heat insulating material 19 is arranged in a gap between the exhaust duct 17 and the exhaust duct 17, and closing plates 20 for closing the gap are set at both ends of the through sleeve 18.

FIG. 2 shows the reactor building body 2 having the above structure.
FIG. 3 is a schematic cross-sectional view showing the state of the initial stage of the skeleton building construction of the furnace container chamber 3. That is, a cylindrical container 32 is shown in which a cylindrical container lower flange 33 is fixed to the base mat 22 via a cylindrical container anchor bolt on the upper surface of a reinforced concrete base mat 22 constructed on the bedrock 21. Cylindrical container
The reactor support ring 8 is connected to the upper end of 32 in advance.

A plurality of stud bolts 35 are provided on the outer surface of the straight body portion of the cylindrical container 32 and the outer peripheral surface of the reactor support ring 8. At the upper part of the cylindrical container 32, the furnace container air-cooled cylinder support structure 11
A furnace container air-cooling cylinder 9 fixed to a cylindrical container 32 via a shield body 13 is fixed in advance in an intermediate portion of the cylindrical container 32. A penetrating sleeve 18 communicating with 32 is fixed.

An exhaust duct 17 is inserted in the through sleeve 18, and one end of this exhaust duct 17 has an exhaust bellows 16
It is fixed to the furnace vessel air-cooling cylinder 9 via. A heat insulating material 19 is filled in a gap between the through sleeve 18 and the exhaust duct 17, and the gap is closed by closing plates 20 fixed to both ends of the through sleeve 18.

Next, the operation of the above embodiment will be described. bedrock
A cylindrical container 32 is placed on a base mat 22 constructed on a 21 by a temporary lifting equipment, and a cylindrical container lower flange 33 is fixed via a cylindrical container anchor bolt 34 embedded in the base mat 22. Subsequently, the skeleton construction work for the wall portion forming the furnace container chamber 3 is continued.

By using the straight body forming the cylindrical container 32 as a concrete form of the wall forming the inner surface of the furnace chamber 3, general formwork becomes unnecessary. Since the reactor support ring 8 and the penetrating sleeve 18 are connected to the cylindrical vessel 32 in advance, it is not necessary to interrupt the wall body construction work of the reactor vessel chamber 3 due to these setting operations.

After placing the concrete on the wall of the reactor vessel chamber 3, the outer surface of the straight body of the cylindrical vessel 32 and the reactor support ring 8
A plurality of stud bolts 35 arranged on the outer periphery enhances the adhesion between the wall concrete and the cylindrical container 32 and the reactor support ring 8, so that the reactor container air cooling that acts on the cylindrical container 32 and the reactor support ring 8 is performed. The supporting load of the cylinder 9, the reactor vessel 1 and the like can be reliably transmitted to the wall portion forming the reactor vessel chamber 3.

Then, after the concrete forming the wall portion of the reactor vessel chamber 3 has been cast up to the upper end of the cylindrical vessel 32, the air supply duct 15 is inserted into the air supply hole 14 formed in the reactor support ring 8.
Are connected to each other, and the wall portion and the ceiling portion that form the reactor upper chamber 5 are constructed to complete the reactor building construction.

Since the reactor vessel air-cooling cylinder 9 and the shield 13 are fixed to the cylindrical vessel 32 in advance in the reactor vessel chamber 3, no work is required in the reactor vessel chamber 3 at the construction site, and the reactor is immediately It is possible to hang the container 1 in the furnace chamber.

Next, the effect of this embodiment will be described. First,
By using the cylindrical container 32 as a concrete formwork on the inner surface of the furnace container chamber 3, the formwork work inside the furnace container chamber 3 becomes unnecessary, and the man-hours of the skeleton construction work can be reduced. Further, by fixing the reactor support ring 8 and the penetrating sleeve 18 to the cylindrical vessel 32 in advance, concrete work on the wall portion forming the reactor vessel chamber 3 can be continuously performed regardless of these setting operations, It is possible to reduce the process of constructing the wall body structure of the furnace container chamber 3. Further, inside the cylindrical container 32, a furnace container air-cooling cylinder 9, a shield 13 and an exhaust duct which are preset in the furnace container chamber 3 are provided.
By fixing 17 it is possible to reduce the on-site construction process in the furnace chamber 3.

Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 3 is an enlarged view showing an intermediate portion of the cylindrical container 32 in the second embodiment of the present invention. In the second embodiment, the reactor vessel air cooling cylinder 9 and the reactor vessel 1 are provided in the reactor vessel chamber 3. It is equipped with a seismic steady rest 37.

A plurality of small-diameter through holes 36 are formed in the vertical direction so as to form an air flow path in the gap between the reactor vessel chamber 3 and the reactor vessel air-cooling cylinder 9 and the gap between the reactor vessel air-cooling cylinder 9 and the reactor vessel 1. A frustoconical reactor vessel seismic steady rest 37 is fixed to the inner surface of the cylindrical vessel 32. The reactor vessel seismic steady rest 37 and the reactor vessel 1 are arranged with an appropriate gap so that the reactor vessel 1 can slide in the vertical direction.

Of the reactor vessel air-cooling cylinder upper half 11a and the reactor vessel air-cooling cylinder lower half 11b which are part of the reactor vessel air-cooling cylinder 9 and which are divided into two parts by the reactor vessel seismic steady rest 37, The upper half of the lower half 11b of the reactor vessel air-cooling cylinder is fixed to the lower surface of the reactor vessel seismic anti-vibration device 37, and the upper surface of the reactor vessel seismic anti-vibration device 37 has a circle continuous above the lower half 11b of the reactor vessel air-cooling cylinder. An annular furnace container air-cooling cylinder upper half guide sleeve 38 is provided, and is in contact with the inner surface of the lower end of the furnace container air-cooling cylinder upper half 11a.

The operation of the second embodiment having such a configuration will be described. Because the seismic design of reactor facilities is strict,
When installing a reactor in the high seismic zone, the seismic steady rest 37 is generally set in the reactor vessel 1, and the same measures should be taken when installing a small fast reactor in the high seismic zone. Becomes

By setting the reactor vessel seismic anti-vibration device 37 in the lower part of the reactor vessel 1, it is possible to increase the natural period of the reactor vessel 1 and to limit and support the horizontal displacement of the reactor vessel. It is possible to reduce the stress acting on the parts, and to improve the earthquake resistance of the reactor.

Further, the seismic steady rest 37 of the reactor vessel 1
With respect to the upper half 11a of the reactor vessel air-cooling cylinder and the lower half 11b of the reactor vessel air-cooling cylinder, which are divided by the above, they are supported by the seismic steady rest 37 of the reactor vessel 1 without blocking the air passages. The container air cooling cylinder 9 can be supported.

Particularly, since the lower end of the upper half 11a of the air cooling tube of the reactor vessel is externally inserted into the guide sleeve 38 of the upper half of the air cooling tube of the reactor vessel, the stress due to the thermal expansion of the upper half 11a of the air cooling tube of the reactor vessel is applied to the reactor vessel. It is possible to continue forming the air flow path without acting on the seismic steady rest 37. In this embodiment, by fixing the seismic steady rest 37 of the reactor vessel 1 to the cylindrical container 32 in advance, on-site work in the reactor vessel chamber 3 for installation work of the seismic steady rest 37 of the reactor vessel 1 is performed. Can be reduced.

Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 4 shows the reactor support ring 8 portion in FIG. Female thread on the upper end of the reactor support ring 8
39 is machined, and a curing plate 40, which is a flat plate or a mirror plate, is arranged above the reactor support ring 8. The curing plate 40 is fixed to the reactor support ring 8 with a curing plate fixing bolt 41.

The operation of this structure will be described. By closing the opening for inserting the reactor vessel 1 formed in the reactor support ring 8 with the curing plate 40 during the period until the construction of the structure of the reactor building is completed, rainwater etc. It is possible to prevent the intrusion into the cylindrical container 32 continuous with 8.

As a result, the structure in the cylindrical container 32 can be stored without being directly exposed to the construction site environment, and the quality control of the structure becomes easy. Further, the curing plate 40 is fixed to the reactor support ring 8 with a curing plate fixing bolt 41,
Since the curing plate 40 does not come off even when the cylindrical container 32 is laid down sideways during transportation or the like, it can be stored in the furnace container chamber 3 not only at the time of construction but also at the time of factory shipment.

Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 5 shows a manufacturing method of the cylindrical container in FIG.

A shield support ring having a cylindrical body lower straight portion 42 having a plurality of stud bolts 35 on its outer surface and an annular shield 13 fixed thereto, having stud bolts 25 on its outer surface and having stud bolts 35 on its outer surface. 43, an exhaust duct support ring 45 having an opening 44 for communicating the penetrating sleeve 18 in the cylindrical body and provided with a stud bolt 35 on the outer surface, and the furnace vessel air-cooling tube support structure 11 on the inner surface. Atomic vessel cooling ring support ring 46 which is fixed to the vessel cooling tube 9 and has stud bolts 35 on the outer surface, a cylindrical vessel upper straight portion 47 having stud bolts 35 on the outer surface, and an atom having stud bolts 35 on the outer surface. The lower opening of the furnace support ring 8 is formed of a cylinder having the same diameter.

The cylindrical container bottom plate 48 having the cylindrical container lower flange 33 on the outer periphery is a flat disk. Exhaust duct 17
On both outer surfaces of both ends of the hollow sleeve, there are provided annular closing plates 20 each having a size that can be inserted into the penetrating sleeve 18. A heat insulating material 19 is fixed to an outer peripheral portion between the closing plates 20 and an exhaust duct.
An exhaust bellows 16 is fixed to one end of 17.

Next, the operation of the fourth embodiment will be described. The cylindrical container is installed to reduce the on-site work in the furnace container chamber, and the cylindrical container is manufactured in a factory not on the construction site. The manufacturing method of the cylindrical container will be described below. An annular shield 13 is inserted into the shield support ring 43 and fixed to the inner surface of the shield support ring 43.

After fixing one end of the through sleeve 18 to the exhaust duct support ring 45 so as to communicate with the opening 44 formed in the exhaust duct support ring 45, the exhaust bellows 18 and the closing plate
20 Exhaust duct 17 with heat insulation 19 fixed through sleeve 18
It is inserted inside and the closing plate 20 and the penetrating sleeve 18 are connected. After fixing a plurality of furnace container air-cooling cylinder support structures 11 to the inner surface of the furnace container air-cooling cylinder support ring 46, the furnace container air-cooling cylinder 9 is inserted into the furnace container air-cooling cylinder support ring 46 and the furnace container air-cooling cylinder 9 and the furnace container air-cooling are inserted. The cylinder support structure 11 is fixed.

After the above, on the bottom surface 48 of the cylindrical container, the cylindrical body lower straight part 42, the shield support ring 43, the exhaust duct support ring 45, the furnace container air-cooling cylinder support ring 46, and the cylindrical container upper straight part are provided.
After 47 and the reactor support ring 8 are sequentially connected at their ends, the reactor vessel air-cooling tube 9 and the exhaust bellows 16 are connected from the inside of the reactor vessel air-cooling tube 9.

In the cylindrical container 32 manufactured by such a manufacturing method, the furnace container air-cooling cylinder 9 and the shield 13 in the cylindrical container 32 can be fixed with short cylindrical parts, so that the fixing work can be easily performed. . Further, it is possible to manufacture the cylindrical container 32 by connecting the cylindrical parts from the outer surface by welding, for example.
Since the work in the narrow cylindrical container 9 can be limited to the work for connecting the furnace container air-cooling cylinder 9 and the exhaust bellows 18, the cylindrical container 32 can be easily and safely manufactured.

Next, a fifth embodiment of the present invention will be described with reference to FIG. FIG. 6 shows the peripheral portion of the secondary cooling system equipment room. The entire reactor building 2 is made of reinforced concrete, and is adjacent to the reactor installation section consisting of the reactor vessel chamber 3 for accommodating the reactor vessel 1 and the reactor upper chamber 5 for accommodating the containment dome 4 A secondary cooling system equipment room 60 in which a secondary system hatch 59 is arranged is formed.

In this secondary cooling system equipment room 60, a steel frame 61 is installed.
Is installed, the reactor building 2 is fixed via an iron / steel platform anchor bolt 62 buried in the floor of the secondary cooling system facility room 60, and the steel / steel platform 61 supports a plurality of steel / frame platforms. It is fixed to the embedded metal object 10 embedded in the wall portion of the secondary cooling system equipment room 60 via the structure 63.

A steam generator 49 and a dump tank 51 are fixed to the steel frame 61, and a liner plate 57 is provided below the steel frame 61. A secondary cooling system pipe, a water supply pipe, and a steam pipe are arranged around the steam generator 49, and a secondary cooling system auxiliary connecting the dump tank 51 to the steam generator 49, the secondary cooling system pipe, or the like. The pipe is fixed to the bottom of the steel frame.

2 in the reactor building 2 constructed in this way
The construction procedure of the next cooling system equipment room will be described. Anchor bolts made of steel after the reinforcement work of the base mat 22 of the reactor building 2
Set 62 and cast concrete for the base mat 22.
The embedded hardware 10 is buried while the construction of the wall body structure of the secondary cooling system equipment room 60 is performed, and the construction of the structure of the secondary cooling system equipment room 60 is completed.

After the construction work of the skeleton, a steel frame 61 to which the steam generator 49, the dump tank 51, the liner plate 57 and each pipe are fixed in advance is hung from the secondary hatch 59, and the steel frame anchor bolts 62 are used. An embedded hardware 10 and a steel pedestal fixed to the reactor building 2 and embedded in the wall of the secondary cooling system facility room 60.
The steel pedestal 61 is integrated with the reactor building 2 by fixing the steel pedestal support structure 63 in the gap with 61.

After fixing the steel frame 61 to the secondary cooling system equipment room 60, the secondary system hatch 59 is closed to close the secondary cooling system equipment room 60.
The construction of the secondary cooling system equipment room is completed by connecting the pipes of the adjacent section to the section.

According to this embodiment, the secondary cooling system equipment having a long construction period is fixed to the steel frame in advance, so that the secondary cooling system equipment can be installed in parallel with the skeleton construction work at a place not on the construction site. The construction work can be shortened significantly. In addition, when manufacturing a steel rack in a factory, by providing pressure resistance test equipment and system test equipment for the secondary cooling system equipment in that factory, it is possible to carry out the necessary test inspections before the plant starts operation. It will be possible to implement it, and the test and inspection period at the construction site can be greatly shortened.

Next, a sixth embodiment of the present invention will be described with reference to FIG. FIG. 7 shows the structure of a reactor building that houses a plurality of small fast reactors. Reactor vessels 1 for small fast reactors are respectively arranged in a reactor vessel chamber 3 which is constructed integrally with a reactor building 2 and whose inner surface is formed by a cylindrical vessel 32, and a containment dome 4 is provided in a reactor upper chamber 5. is set up. In the secondary cooling system equipment room 60, which is constructed integrally with the reactor building 2 adjacent to the reactor vessel room 3 and the reactor upper room 5, a steel frame on which a steam generator 49 and a dump tank 51 are fixed, respectively. 61 is provided.

A guide rail (not shown) is arranged at the upper end of the wall portion constituting the furnace upper chamber 5, and a gantry crane 64 is arranged on the rail. The gantry crane 64 has its contribution range on the hatch 28 arranged on the ceiling of the reactor upper chamber 5 and on the secondary system hatch 59 formed on the upper end of the secondary cooling system equipment chamber 60. It is used for the replacement of nuclear fuel inside and maintenance of the steam generator 49, etc.

The rail is fixed on a steel crane gantry 65, which is erected from the bedrock 21 and is embedded in the wall portion forming the reactor building 2, and is fixed to the reactor building 2 via the crane gantry 64. Has been done. A reactor building roof 66 is formed in the upper part of the reactor building 2 so as to include the gantry crane 64, and a space for replacing the nuclear fuel in the reactor vessel 1 and a steam generator in the upper part of the reactor building 2. We provide maintenance space for 49 spaces.

The procedure for constructing the reactor building 2 having such a configuration will be described below. In the construction of the small fast reactor plant, the gantry crane 64 is installed on the rails provided on the crane gantry 65 built on the bedrock 21, and then the skeleton building work of the reactor building 2 is performed. The gantry crane 65 is used for materials such as reinforcing bars necessary for constructing the base mat 22. After constructing the base mat 22, the cylindrical containers 32 are sequentially installed by the gantry crane 65.

Subsequently, the wall parts of the reactor vessel chamber 3, the reactor upper chamber 5 and the secondary cooling system equipment chamber 60 are constructed using the gantry crane 65 in the same manner as the base mat 22, and the skeleton construction work of the reactor building 2 is carried out. To complete. After the construction of the building of the reactor building 2, the gantry crane 64 carries the reactor vessel 1 and the storage dome 4 into the reactor building 2 by the gantry crane 65 for installation, and the construction of the reactor building roof 66 is performed.

However, in the conventional reactor building, the overhead traveling crane provided in the reactor building roof 66 was used to hang the reactor vessel 1 and the like into the reactor building 2. According to this, the crane gantry 65 was constructed before the construction of the reactor building 2.
The gantry crane 64 can travel above the cylindrical container.
It can also be used as lifting equipment for the installation of 32 and the building construction work of the reactor building 2, and the number of temporary lifting equipment during the construction period can be reduced.

After the construction of the building of the reactor building 2 is completed, the reactor vessel 1, the storage dome 4 and the steel pedestal 61 are carried into the reactor building 2 in parallel with the construction of the reactor building roof 66. Therefore, the construction period can be shortened significantly.

[0097]

According to claim 1 of the present invention, it is possible to reduce the number of man-hours for the concrete construction of the reactor building, reduce the process of setting the buried object in the concrete, and reduce the process of setting the structure in the reactor chamber. In addition to the reduction, the construction period of the entire reactor building can be greatly shortened.

According to claim 2 of the present invention, the construction period can be shortened even in the construction of a small fast reactor in a high earthquake zone,
According to claim 3 of the present invention, the structure in the cylindrical container during the construction period is isolated from the construction site environment, and the quality of the structure can be easily maintained. According to claim 4 of the present invention, The cylindrical container can be easily manufactured, and according to claim 5 of the present invention, the construction period of the secondary cooling system equipment can be significantly shortened,
According to claim 6 of the present invention, the number of temporary lifting equipment can be reduced and the construction period can be significantly shortened.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a partial side view of a structure of a peripheral part of a nuclear reactor building of a small fast reactor according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a partial side view of the state of the initial stage of the building construction work of the reactor vessel room of the reactor building according to the present invention.

FIG. 3 is a vertical cross-sectional view showing a reactor vessel seismic steady rest of an intermediate portion of a cylindrical vessel according to a second embodiment of the present invention.

FIG. 4 is a vertical sectional view showing a nuclear reactor support ring portion according to a third embodiment of the present invention.

FIG. 5 is a partially exploded view for explaining the method of manufacturing the cylindrical container according to the fourth embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view showing a peripheral portion of a secondary cooling system equipment room according to a fifth embodiment of the present invention in a partial side view.

FIG. 7 is a vertical cross-sectional view showing a partial side view of the structure of a reactor building accommodating a plurality of small fast reactors according to a sixth embodiment of the present invention.

FIG. 8 is a vertical cross-sectional view showing a structure of a peripheral part of a nuclear reactor building of a conventional small fast reactor in a side view.

[Fig. 9] Fig. 9 is a diagram for explaining a construction procedure process of a building construction work of a peripheral portion of a reactor at the time of conventional reactor building construction,
(A) is a state diagram in the initial stage, (b) is a state diagram in the middle stage, and (c) is a state diagram in the final stage.

FIG. 10 is a vertical cross-sectional view schematically showing a part of the construction procedure of equipment setting work for the reactor vessel chamber and the reactor upper chamber of the conventional reactor building.

FIG. 11 is a vertical cross-sectional view showing the structure of a part of the conventional small-scale fast reactor building that houses the secondary cooling system equipment in a side view.

[Explanation of symbols]

1 ... Reactor vessel, 2 ... Reactor building body, 3 ... Reactor vessel room,
4 ... Storage dome, 5 ... Reactor upper chamber, 6 ... Reactor vessel support part, 7 ... Reactor support ring anchor bolt, 8 ... Reactor support ring, 9 ... Reactor vessel air-cooled tube, 10 ... Embedded metal article, 11 ... Reactor vessel air-cooling tube support structure, 11a ... Furnace vessel air-cooling tube upper half, 11b
… Furnace container air cooling cylinder lower half, 12… Furnace container air cooling support flange,
13 ... Shield, 14 ... Air supply hole, 15 ... Air supply duct, 16 ... Exhaust bellows, 17 ... Exhaust duct, 18 ... Through hole, 19 ... Insulation material, 20
… Closure plate, 21… Bedrock, 22… Base mat, 23… Furnace vessel chamber wall, 24… Temporary scaffolding, 25… Temporary support structure, 26… Middle floor, 27… Furnace upper wall, 28… Hatch, 29 … Ceiling slabs, 30
… Aperture, 31… Temporary scaffolding, 32… Cylinder container, 33… Cylinder container lower flange, 34… Cylinder container anchor bolt, 35… Stud bolt, 36… Penetration part, 37… Reactor container seismic anti-vibration device, 38… Upper half guide sleeve for air-cooling tube of furnace container, 39 ... Female screw, 40 ... Curing plate, 41 ... Curing plate fixing bolt, 42 ... Cylindrical container lower straight body part, 43 ... Shield support ring, 44 ... Opening part, 45 ...
Exhaust duct support ring, 46 ... Furnace vessel air-cooled tube support ring,
47 ... Cylindrical container upper straight part, 48 ... Cylindrical container bottom plate, 49 ... Steam generator, 50 ... Secondary cooling system upper chamber, 51 ... Dump tank, 52
... Secondary cooling system lower chamber, 53 ... Steam generator support floor, 57 ... Liner plate, 58 ... Liner heat insulating material, 59 ... Secondary system hatch, 60 ... Secondary cooling system facility room, 61 ... Steel frame, 62 … Steel base anchor bolts, 63… Steel support structure, 64… Gantry crane, 65… Crane gantry, 66… Reactor building roof.

Claims (6)

(57) [Claims] 1. A reactor building main body made of reinforced concrete for accommodating a reactor of a small fast reactor of a reflector control system, a reactor container room formed inside the reactor building main body, and an inside of the reactor container room. A cylindrical container forming a wall surface, a reactor container cooling cylinder and a shield provided inside the cylindrical container, a reactor support ring connected to the upper end of the cylindrical container, the cylindrical container and the reactor support ring A plurality of stud bolts provided on the outer surface of the, and a penetrating sleeve that communicates with the intermediate portion of the cylindrical container and penetrates the wall surface of the furnace container chamber,
An exhaust duct having an exhaust bellows inserted through the through sleeve, and a heat insulating material surrounding a side surface of the exhaust duct;
Provided on the end surface of the heat insulating material ,
A nuclear reactor building comprising: a closing plate that closes a gap between the through sleeve and the exhaust duct . 2. The reactor building according to claim 1, wherein a reactor vessel seismic anti-vibration device is provided inside the cylindrical vessel. Wherein a female screw provided on an upper surface of the reactor support ring reactor according to claim 1 and 2, wherein the provided with the cured plate of the plate or end plate in this female screw building. 4. The cylindrical container is provided in the cylindrical container.
The reactor building according to claim 1 or 2 , wherein each of the cylindrical container internal structures has a plurality of cylindrical parts . 5. A reactor building main body made of reinforced concrete for accommodating a reactor of a small-scale fast reactor with a reflector control system, a reactor vessel chamber and a reactor upper chamber formed inside the reactor building main body , and the reactor. Secondary cooling system equipment room adjacent to the container room and furnace upper room, steel frame that can be installed in the secondary cooling system room, steam generator and dump tank fixed to this steel frame And a liner plate provided below the steel pedestal. 6. A hatch arranged on the ceiling of the furnace upper chamber, a secondary system hatch arranged on the ceiling of the secondary cooling system equipment chamber, and a gantry crane traveling on the furnace upper chamber . The crane gantry embedded in the body of the reactor building and the Gantt installed on the upper part of the reactor building body.
The reactor building according to claim 5, further comprising: a reactor building roof surrounding the Lee crane .