Cooler for nuclear containment vessel, and nuclear facility

Abstract

To cool a nuclear containment vessel early, in a cooler for the nuclear containment vessel and a nuclear facility.SOLUTION: A cooler for a nuclear containment vessel comprises: a hydraulic unit that is arranged inside a nuclear containment vessel, and in which a first chamber and a second chamber are separated by a piston inside a cylinder, the first chamber communicates with the inside of the nuclear containment vessel, and the second chamber is filled with hydraulic oil; a water-cool unit that is arranged outside the nuclear containment vessel, and in which a third chamber and a fourth chamber are separated by the piston inside the cylinder, the third chamber communicates with the second chamber of the hydraulic unit via a hydraulic coupling pipe, and the fourth chamber is filled with cooling water; and a heat exchanger that is arranged inside the nuclear containment vessel, one end part of which is connected to the fourth chamber of the water-cooling unit via a water-cooling coupling pipe, and the other end of which is open to the outside of the nuclear containment vessel.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a cooling device for a reactor containment vessel and nuclear power facilities.

Background Art

[0002] A reactor containment vessel is erected on a solid ground such as rock, and a reactor is disposed inside. The reactor is supported by a concrete structure provided at the base of the reactor containment vessel. In nuclear power facilities, as a severe accident, an event in which the pressure and temperature inside the reactor containment vessel increase is assumed. At this time, it is necessary to cool the inside of the reactor containment vessel by a cooling device to suppress the increase in pressure and temperature. As such a cooling device for a reactor containment vessel, for example, there is one described in Patent Document 1.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the cooling device for a reactor containment vessel described in Patent Document 1, a heat exchanger is provided inside the reactor containment vessel, and a cooling pump provided outside the reactor containment vessel is driven to supply cooling water from a circulation pipe to the heat exchanger, thereby cooling the inside of the reactor containment vessel. However, when the power supply in nuclear power facilities is lost, the cooling pump cannot be operated, and there is a risk that the inside of the reactor containment vessel cannot be cooled early.

[0005] The present disclosure solves the above-described problems, and an object thereof is to provide a cooling device for a reactor containment vessel and a nuclear power facility that enable early cooling of the inside of the reactor containment vessel.

Means for Solving the Problems

[0006] The cooling device for a reactor containment vessel of the present disclosure for achieving the above object is disposed inside the reactor containment vessel. A piston inside a cylinder partitions a first chamber and a second chamber. The first chamber communicates with the inside of the reactor containment vessel, and the second chamber is filled with hydraulic oil. A hydraulic unit is provided. A water-cooling unit is disposed outside the reactor containment vessel. A piston inside a cylinder partitions a third chamber and a fourth chamber. The third chamber is connected to the second chamber of the hydraulic unit via a hydraulic connection pipe, and the fourth chamber is filled with cooling water. A heat exchanger is disposed inside the reactor containment vessel. One end of the heat exchanger is connected to the fourth chamber of the water-cooling unit via a water-cooling connection pipe, and the other end is open to the outside of the reactor containment vessel.

[0007] Moreover, the nuclear power facility of the present disclosure includes a reactor disposed inside the reactor containment vessel and the cooling device for the reactor containment vessel.

Advantages of the Invention

[0008] According to the cooling device for a reactor containment vessel and the nuclear power facility of the present disclosure, the inside of the reactor containment vessel can be cooled early.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0010] Hereinafter, with reference to the drawings, preferred embodiments of the present disclosure will be described in detail. Note that the present disclosure is not limited by this embodiment, and when there are multiple embodiments, those configured by combining each embodiment are also included. In addition, the components in the embodiment include those that can be easily assumed by those skilled in the art, substantially the same ones, and those within the so-called equivalent range.

[0011] <Nuclear facility> FIG. 1 is a schematic diagram showing the nuclear facility of this embodiment.

[0012] As shown in FIG. 1, the nuclear facility 10 is applied to a nuclear power plant. The nuclear facility 10 of this embodiment uses light water as a reactor coolant and a neutron moderator, forms high-temperature and high-pressure water that does not boil throughout the primary system, sends the high-temperature and high-pressure water to a steam generator to generate steam by heat exchange, and sends the steam to a turbine generator to generate electricity, and is equipped with a pressurized water reactor (PWR: Pressurized Water Reactor). However, the reactor is not limited to a pressurized water reactor, and can also be applied to other reactors such as a boiling water reactor (BWR: Boiling Water Reactor).

[0013] The reactor containment vessel 11 is arranged on a solid ground G such as rock. The reactor containment vessel 11 includes a base portion 12 and a containment vessel main body 13. The base portion 12 is installed on the ground G, and the containment vessel main body 13 is erected on the base portion 12. The base portion 12 and the containment vessel main body 13 have an integral structure. The containment vessel main body 13 is provided with a structure 14 constructed by reinforced concrete or the like inside. The structure 14 is arranged inside the containment vessel main body 13 above the base portion 12.

[0014] The reactor containment vessel 11 has a reactor 15 disposed at its central part. The structure 14 defines a cylindrical space portion 16 at the central part of the reactor containment vessel 11. The reactor 15 is disposed in the space portion 16 and is suspended and supported by the structure 14 forming the inner wall portion of the space portion 16. A plurality of steam generators 17 are disposed around the reactor 15 in the reactor containment vessel 11. The plurality of steam generators 17 are supported by the structure 14. The reactor 15 and the plurality of steam generators 17 are connected by a cooling water pipe 18.

[0015] A cavity 19 is defined and formed below the reactor 15 in the reactor containment vessel 11. The cavity 19 receives and cools the core melt that falls from the reactor 15. The reactor containment vessel 11 is provided with a cooling water pit 20 for storing cooling water at the base portion 12, and a cooling water injection device 21 is provided at the upper part of the containment vessel main body 13. The cooling water pit 20 is connected to the cooling water injection device 21 by a cooling water path 22, and a cooling water pump 23 is provided in the cooling water path 22.

[0016] The reactor 15 is configured with a core 25 disposed inside a reactor vessel 24. The reactor vessel 24 is configured with a reactor vessel lid detachably provided at the upper part of the reactor vessel main body. The reactor vessel 24 is provided with an inlet nozzle for supplying light water (coolant) as primary cooling water and an outlet nozzle for discharging the light water at its upper side portion. The reactor vessel 24 has the cooling water pipe 18 from the steam generator 17 connected to the inlet nozzle and the outlet nozzle respectively. The core 25 disposed inside the reactor vessel 24 is composed of a plurality of fuel assemblies. Each fuel assembly is configured by bundling a large number of fuel rods in a lattice shape by a support lattice. Note that a plurality of control rods for controlling the output of the reactor 15 are disposed together with the large number of fuel rods in the core 25.

[0017] The nuclear reactor 15 releases neutrons by nuclear fission of the nuclear fuel that constitutes the reactor core 25. Light water as a moderator and primary coolant reduces the kinetic energy of the released fast neutrons to thermal neutrons, making it easier for new nuclear fissions to occur, and takes away the generated heat for cooling. At this time, by inserting control rods into the reactor core 25 and adjusting the number of neutrons generated in the reactor core 25, the output of the nuclear reactor 15 is adjusted.

[0018] The steam generator 17 is connected to a steam turbine provided outside the reactor containment vessel 11 via a steam pipe. The steam turbine is connected to a generator. The steam generator 17 generates steam by performing heat exchange between the high-temperature primary coolant supplied from the nuclear reactor 15 and the secondary coolant. The generated steam is sent to the steam turbine to drive it, and power generation is performed by the generator. The steam that has driven the steam turbine is returned to the steam generator 17 after being cooled.

[0019] <Cooling Device for Reactor Containment Vessel> FIG. 2 is a schematic diagram showing the cooling device for the reactor containment vessel of the present embodiment.

[0020] As shown in FIG. 1, the nuclear power facility 10 includes a cooling device 30 for the reactor containment vessel. The cooling device 30 for the reactor containment vessel cools the inside of the reactor containment vessel 11 arranged so as to surround the nuclear reactor 15 (see FIG. 1). The cooling device 30 for the reactor containment vessel includes a hydraulic unit 31, a water-cooled unit 32, and a heat exchanger 33.

[0021] The hydraulic unit 31 is arranged inside the reactor containment vessel 11. The hydraulic unit 31 is vertically supported on a support base 40 on the base portion 12, for example. The hydraulic unit 31 has a cylinder 41, a piston 42, and a communication pipe 43.

[0022] The cylinder 41 is vertically attached to the support base 40. The piston 42 is supported movably in the axial direction (vertical direction) inside the cylinder 41. When the piston 42 is disposed inside the cylinder 41, the cylinder 41 and the piston 42 partition and define a first chamber R1 and a second chamber R2. The first chamber R1 is disposed above the piston 42 in the cylinder 41, and the second chamber R2 is disposed below the piston 42 in the cylinder 41.

[0023] The communication pipe 43 is formed to be bent in an L shape. One end of the communication pipe 43 is connected to the upper part of the cylinder 41 and communicates with the first chamber R1. The other end of the communication pipe 43 is arranged along the horizontal direction and opens to communicate with the inside of the reactor containment vessel. Note that the communication pipe 43 is not limited to the L shape, and may be in a curved shape or a straight shape. And the cylinder 41 is filled with hydraulic oil, which is an incompressible fluid, in the second chamber R2.

[0024] Also, an open valve 44 is provided in the communication pipe 43 of the hydraulic unit 31. The open valve 44 opens according to the pressure inside the reactor containment vessel 11, and it is preferable to employ a rupture disk. That is, when the pressure inside the reactor containment vessel 11 reaches a preset predetermined pressure, the rupture disk of the open valve 44 ruptures and the valve opens.

[0025] The water cooling unit 32 is disposed outside the reactor containment vessel 11. The water cooling unit 32 is vertically supported by a support base 50 on, for example, the base portion 12. The water cooling unit 32 includes a cylinder 51 and a piston 52.

[0026] The cylinder 51 is vertically attached to the support base 50. The piston 52 is supported movably in the axial direction (vertical direction) inside the cylinder 51. When the piston 52 is disposed inside the cylinder 51, the cylinder 51 and the piston 52 partition and define a third chamber R3 and a fourth chamber R4. The third chamber R3 is disposed above the piston 52 in the cylinder 51, and the fourth chamber R4 is disposed below the piston 52 in the cylinder 51.

[0027] The hydraulic unit 31 and the water-cooling unit 32 are connected by a hydraulic connection pipe 53. The hydraulic connection pipe 53 is formed by being bent so as to have a Z shape. One end of the hydraulic connection pipe 53 is connected to the lower part of the cylinder 41 of the hydraulic unit 31 and communicates with the second chamber R2. The other end of the hydraulic connection pipe 53 is connected to the upper part of the cylinder 51 of the water-cooling unit 32 and communicates with the third chamber R3. Note that the hydraulic connection pipe 53 is not limited to a Z shape and may have another bent shape, a curved shape, or the like.

[0028] That is, the hydraulic unit 31 and the water-cooling unit 32 are vertically arranged inside and outside the reactor containment vessel 11 with the wall of the containment vessel main body 13 in the reactor containment vessel 11 interposed therebetween. The hydraulic connection pipe 53 penetrates the wall of the containment vessel main body 13, one end communicates with the second chamber R2 disposed at the lower part of the hydraulic unit 31, and the other end communicates with the third chamber R3 disposed at the upper part of the water-cooling unit 32.

[0029] Then, the water-cooling unit 32 is filled with hydraulic oil, which is an incompressible fluid, in the third chamber R3 of the cylinder 51. The hydraulic connection pipe 53 is also filled with hydraulic oil, which is an incompressible fluid. That is, the second chamber R2 of the hydraulic unit 31, the third chamber R3 of the water-cooling unit 32, and the hydraulic connection pipe 53 are filled with hydraulic oil without any gaps. On the other hand, the water-cooling unit 32 is filled with cooling water in the fourth chamber R4 of the cylinder 51.

[0030] The heat exchanger 33 is disposed inside the reactor containment vessel 11. The heat exchanger 33 is preferably disposed above the hydraulic unit 31 inside the reactor containment vessel 11. The heat exchanger 33 has a container 61 and a nozzle 62. The water-cooling unit 32 and the heat exchanger 33 are connected by a water-cooling connection pipe 63. The water-cooling connection pipe 63 has a curved shape, one end is connected to the lower part of the cylinder 51 of the water-cooling unit 32 and communicates with the fourth chamber R4. The other end of the water-cooling connection pipe 63 is connected to the lower part of the container 61 of the heat exchanger 33 and communicates with the inside. One end of the nozzle 62 is connected to the upper part of the container 61 of the heat exchanger 33, and the other end is open to the outside of the reactor containment vessel 11.

[0031] That is, the water-cooling unit 32 and the heat exchanger 33 are arranged inside and outside the reactor containment vessel 11 with the wall of the containment vessel main body 13 in the reactor containment vessel 11 interposed therebetween. The water-cooling connection pipe 63 penetrates the wall of the containment vessel main body 13, with one end communicating with the fourth chamber R4 arranged at the lower part of the water-cooling unit 32 and the other end communicating with the lower part of the container 61.

[0032] Then, the heat exchanger 33 is filled with cooling water. Also, the water-cooling connection pipe 63 is filled with cooling water. That is, the fourth chamber R4 of the water-cooling unit 32, the inside of the container 61 of the heat exchanger 33, and the water-cooling connection pipe 63 are filled with cooling water without any gaps. On the other hand, the nozzle 62 penetrates the wall of the containment vessel main body 13, with one end communicating with the upper part of the container 61 of the heat exchanger 33 and the other end opening to the outside of the reactor containment vessel 11.

[0033] Note that although the hydraulic unit 31 and the water-cooling unit 32 are arranged vertically, they may be arranged horizontally or obliquely. Also, although the heat exchanger 33 is arranged upward, it may be arranged downward or near the reactor 15, etc. Furthermore, it is preferable to provide a plurality of cooling devices 30 for the reactor containment vessel for one reactor containment vessel 11.

[0034] <Cooling method for reactor containment vessel> FIG. 3 is a schematic diagram showing the operation of the cooling device for the reactor containment vessel.

[0035] As shown in FIGS. 1 and 2, in the nuclear power facility 10, for example, it is assumed that a severe accident occurs and the pressure and temperature inside the reactor containment vessel 11 increase. At this time, when the temperature inside the reactor containment vessel 11 rises, the air expands and the pressure also rises, and the increased air pressure acts on the open valve 44 of the communication pipe 43 in the hydraulic unit 31. Then, when the pressure inside the reactor containment vessel 11 reaches a predetermined pressure, the open valve (rupture disk) 44 ruptures and opens.

[0036] When the open valve 44 is opened, the high-pressure air inside the reactor containment vessel 11 flows into the first chamber R1 through the communication pipe 43 and the open valve 44, pressing the piston 42. Then, as shown in FIGS. 1 and 3, when the piston 42 moves downward, the hydraulic unit 31 causes the first chamber R1 to expand and the second chamber R2 to contract, and the hydraulic oil in the second chamber R2 is sent to the water-cooling unit 32 through the hydraulic connection pipe 53.

[0037] When the hydraulic oil is supplied to the third chamber R3 through the hydraulic connection pipe 53, the piston 52 of the water-cooling unit 32 is pressed. Then, when the piston 52 moves downward, the water-cooling unit 32 causes the third chamber R3 to expand and the fourth chamber R4 to contract, and the cooling water in the fourth chamber R4 is sent to the heat exchanger 33 through the water-cooling connection pipe 63.

[0038] The cooling water is sent into the container 61 through the water-cooling connection pipe 63 in the heat exchanger 33. The heat exchanger 33 exchanges heat between the cooling water inside the container 61 and the high-temperature and high-pressure air inside the reactor containment vessel 11. That is, the heat exchanger 33 cools the high-temperature and high-pressure air inside the reactor containment vessel 11 with the cooling water inside the container 61. The heated cooling water (or steam) inside the container 61 after the heat exchanger 33 cools the high-temperature and high-pressure air inside the reactor containment vessel 11 is discharged from the nozzle 62 to the outside of the reactor containment vessel 11.

[0039] When the air inside the reactor containment vessel 11 is at high temperature and high pressure, the hydraulic unit 31 and the water-cooling unit 32 continue to operate, so that the cooling water is continuously sent to the heat exchanger 33. Therefore, the heat exchanger 33 can appropriately cool the air inside the reactor containment vessel 11 by suppressing the shortage of the cooling water and continuously sending the cooling water to the container 61.

[0040] When the temperature and pressure of the air inside the reactor containment vessel 11 decrease, the heat exchanger 33 terminates the cooling of the air inside the reactor containment vessel 11 with the cooling water. Here, when the temperature and pressure of the air inside the reactor containment vessel 11 decrease, the air contracts and the pressure decreases. Then, the hydraulic unit 31 has the air in the first chamber R1 sucked into the reactor containment vessel 11, the piston 42 moves upward, the first chamber R1 shrinks, and the second chamber R2 expands. Then, the hydraulic unit 31 sucks the hydraulic oil of the water-cooling unit 32 through the hydraulic connection pipe 53.

[0041] In the water-cooling unit 32, the hydraulic oil in the third chamber R3 is sucked into the second chamber R2 of the hydraulic unit 31, the piston 52 moves upward, the third chamber R3 shrinks, and the fourth chamber R4 expands. Then, the water-cooling unit 32 sucks the cooling water of the heat exchanger 33 through the water-cooling connection pipe 63. Since the cooling water inside the container 61 of the heat exchanger 33 is sucked into the fourth chamber R4 of the water-cooling unit 32 and the inside of the container 61 becomes a negative pressure, the heat exchanger 33 sucks the air outside the reactor containment vessel 11 through the nozzle 62. Then, the hydraulic unit 31, the water-cooling unit 32, and the heat exchanger 33 return to their original states. In addition, if necessary, the cooling water of the water-cooling unit 32 and the heat exchanger 33 is replenished. In this case, for example, one end of a cooling water replenishment line 71 is connected to the nozzle 62 of the heat exchanger 33, and the other end of the cooling water replenishment line 71 is preferably connected to a cooling water tank (such as the sea) 73 via a pump device (such as a pump truck) 72.

[0042] [Operation and Effect of this Embodiment] The cooling device for a reactor containment vessel according to the first aspect is disposed inside the reactor containment vessel 11. A piston 42 inside a cylinder 41 partitions a first chamber R1 and a second chamber R2. The first chamber R1 communicates with the inside of the reactor containment vessel 11. The second chamber R2 is filled with hydraulic oil. A hydraulic unit 31 is provided. A piston 52 inside a cylinder 51 partitions a third chamber R3 and a fourth chamber R4. The third chamber R3 is connected to the second chamber R2 of the hydraulic unit 31 via a hydraulic connection pipe 53. The fourth chamber R4 is filled with cooling water. A water-cooling unit 32 is provided. A heat exchanger 33 is disposed inside the reactor containment vessel 11. One end of the heat exchanger 33 is connected to the fourth chamber R4 of the water-cooling unit 32 via a water-cooling connection pipe 63, and the other end is open to the outside of the reactor containment vessel 11.

[0043] According to the cooling device for a reactor containment vessel according to the first aspect, when the pressure and temperature inside the reactor containment vessel 11 increase, the air expands and the pressure also increases. The increased air pressure acts on the first chamber R1 of the hydraulic unit 31 from the communication pipe 43, moving the piston 42. Then, the hydraulic oil in the second chamber R2 is supplied to the third chamber R3 of the water-cooling unit 32 through the hydraulic connection pipe 53, moving the piston 52. Then, the cooling water in the fourth chamber R4 is sent to the heat exchanger 33 through the water-cooling connection pipe 63. The heat exchanger 33 exchanges heat between the cooling water sent from the water-cooling unit 32 and the high-temperature and high-pressure air inside the reactor containment vessel 11, cooling the high-temperature and high-pressure air inside the reactor containment vessel 11. As a result, even when the power supply in the nuclear power facility 10 is lost, the reactor containment vessel 11 can be cooled early.

[0044] Also, according to the cooling device for the reactor containment vessel according to the first aspect, the air inside the reactor containment vessel 11 only flows up to the first chamber R1 of the hydraulic unit 31 disposed inside the reactor containment vessel 11. The hydraulic unit 31 and the water-cooling unit 32 are isolated inside the second chamber R2, the third chamber R3, and the water-cooling connection pipe 63. The cooling water filled in the fourth chamber R4 of the water-cooling unit 32 disposed outside the reactor containment vessel 11, the water-cooling connection pipe 63, and the heat exchanger 33 does not come into direct contact with the air inside the reactor containment vessel 11. Even when the air inside the reactor containment vessel 11 is contaminated, leakage of the contaminated air to the outside of the reactor containment vessel 11 is suppressed.

[0045] The cooling device for the reactor containment vessel according to the second aspect is the cooling device for the reactor containment vessel according to the first aspect. Further, the hydraulic unit 31 and the water-cooling unit 32 are vertically arranged inside and outside with the wall portion of the reactor containment vessel 11 interposed therebetween. The hydraulic connection pipe 53 penetrates the wall portion of the containment vessel main body 13, and one end is connected to the second chamber R2 disposed at the lower part of the hydraulic unit 31, and the other end is connected to the third chamber R3 disposed at the upper part of the water-cooling unit 32. Thereby, the hydraulic unit 31 and the water-cooling unit 32 can be efficiently arranged inside the reactor containment vessel 11.

[0046] The cooling device for the reactor containment vessel according to the third aspect is the cooling device for the reactor containment vessel according to the first aspect or the second aspect. Further, the heat exchanger 33 is disposed above the hydraulic unit 31. Thereby, the air at the upper part of the reactor containment vessel 11, which is likely to become high temperature and high pressure, can be actively cooled.

[0047] The cooling device for the reactor containment vessel according to the fourth aspect is the cooling device for the reactor containment vessel according to any one of the first to third aspects, and further, one end of the hydraulic unit 31 is connected to the first chamber R1 and the other end opens into the inside of the reactor containment vessel 11. A communication pipe 43 is provided with an opening valve 44 that opens according to the pressure inside the reactor containment vessel 11. Thereby, until the pressure inside the reactor containment vessel 11 reaches a predetermined pressure, the hydraulic unit 31 does not operate. By opening the opening valve 44 with air at a predetermined pressure and acting on the first chamber R1, the cooling water is appropriately supplied to the heat exchanger 33 through the hydraulic oil, and the air in the reactor containment vessel 11 can be efficiently cooled.

[0048] The cooling device for the reactor containment vessel according to the fifth aspect is the cooling device for the reactor containment vessel according to the fourth aspect, and further, the opening valve 44 has a rupture disk. Thereby, the structure of the opening valve 44 can be simplified.

[0049] The nuclear power facility according to the sixth aspect includes a reactor containment vessel 11, a reactor 15 disposed inside the reactor containment vessel 11, and a cooling device 30 for the reactor containment vessel. Thereby, even when the power supply in the nuclear power facility 10 is lost, the cooling device 30 for the reactor containment vessel can cool the reactor containment vessel 11 at an early stage, and the safety can be improved.

Explanation of reference numerals

[0050] 10 Nuclear power facility 11 Reactor containment vessel 12 Base part 13 Containment vessel main body 14 Structure 15 Reactor 16 Space part 17 Steam generator 18 Cooling water pipe 19 Cavity 20 Cooling water pit 21 Cooling water injection device 22 Cooling water path 23 Cooling water pump 24 Reactor vessel 25 Core 30 Cooling device for reactor containment vessel 31 Hydraulic unit 32 Water-cooling unit 33 Heat exchanger 41 Cylinder 42 Piston 43 Connecting pipe 44 Open valve 51 Cylinder 52 Piston 53 Hydraulic connecting pipe 61 Container 62 Nozzle 63 Water-cooling connecting pipe 71 Cooling water replenishment line 72 Pump device 73 Cooling water tank R1 First chamber R2 Second chamber R3 Third chamber R4 Fourth chamber

Claims

1. An oil pressure unit disposed inside the reactor containment vessel, in which a piston inside a cylinder partitions a first chamber and a second chamber, the first chamber communicates with the inside of the reactor containment vessel, and the second chamber is filled with hydraulic oil; A water cooling unit disposed outside the reactor containment vessel, in which a piston inside a cylinder partitions a third chamber and a fourth chamber, the third chamber is connected to the second chamber of the oil pressure unit via a hydraulic connection pipe, and the fourth chamber is filled with cooling water; A heat exchanger disposed inside the reactor containment vessel, one end of which is connected to the fourth chamber of the water cooling unit via a water cooling connection pipe, and the other end of which is open to the outside of the reactor containment vessel; A cooling device for a reactor containment vessel comprising the above components.

2. The oil pressure unit and the water cooling unit are vertically arranged inside and outside with the wall of the reactor containment vessel therebetween, the hydraulic connection pipe penetrates the wall, one end is connected to the second chamber disposed at the lower part of the oil pressure unit, and the other end is connected to the third chamber disposed at the upper part of the water cooling unit; The cooling device for a reactor containment vessel according to Claim 1.

3. The heat exchanger is disposed above the oil pressure unit; The cooling device for a reactor containment vessel according to Claim 1 or Claim 2.

4. The oil pressure unit is provided with a communication pipe having one end connected to the first chamber and the other end opening to the inside of the reactor containment vessel, and an opening valve that opens according to the pressure inside the reactor containment vessel is provided in the communication pipe; The cooling device for a reactor containment vessel according to Claim 1.

5. The opening valve has a rupture disk; The cooling device for a reactor containment vessel according to Claim 4.

6. A reactor containment vessel; A reactor disposed inside the reactor containment vessel; The cooling device for a reactor containment vessel according to Claim 1; A nuclear power facility comprising the above components.

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