JPH08334585A - Reactor equipment and its operation method - Google Patents

Abstract

PURPOSE: To provide a reactor equipment capable of preventing the breakage of a reactor containment and the internal equipment of the containment and maintaining the integrity of the reactor containment and its operational method. CONSTITUTION: The reactor equipment is provided with a reactor containment 33, a reactor pressure vessel 2 arranged in the reactor containment and containing a core 1, a drywell 3 and a wetwell 6 containing the reactor pressure vessel 2, an operation floor 8 formed at the upper part of the reactor containment 2 and a rupture disk 9 placed in between the operation floor 8 and the wetwell 6. Also, it is provided with, on the operation floor 8, a gas reaction suppression device 12 for injecting material suppressing the reaction of hydrogen and oxygen upon receiving an accident occurrence signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nuclear reactor facility and a method of operating the same in an emergency, and more particularly to a nuclear reactor capable of suppressing a reaction between combustible gas and oxygen generated in a reactor containment vessel at the time of an accident. The present invention relates to equipment and its operation method in an emergency.

[0002]

2. Description of the Related Art At the time of a design standard accident, which is to be considered in designing a nuclear reactor, a small amount of hydrogen and oxygen are generated by zirconium-water reaction and radiolysis of water, and are accumulated in the reactor containment vessel. In order to suppress this rapid reaction between hydrogen and oxygen, in the present nuclear power plant, the atmosphere in the reactor containment vessel is replaced with nitrogen to remove oxygen in the reactor containment vessel, and then the hydrogen and oxygen are regenerated. A flammable gas concentration control system (FCS) equipped with a coupler is installed, and measures are taken to keep the concentrations of hydrogen and oxygen below the reaction range.

There is also an equipment called an emergency gas treatment system (SGTS) for discharging the gas in the reactor containment vessel to the outside of the reactor containment vessel while monitoring the radioactive level. However, in the event of an accident with a very low probability of occurrence and an event that is unlikely to occur, a large amount of hydrogen is generated due to the zirconium-water reaction, and the combustible gas concentration control system and emergency gas It cannot be handled by the processing system. Further, the diffusion of hydrogen in a large-sized containment vessel at high temperature and high pressure is uncertain, and it is necessary to design the capacities of the flammable gas concentration control system and the emergency gas treatment system to be excessively large, which increases equipment costs.

On the other hand, although a pressure increase in the reactor containment vessel due to the gas pressure of hydrogen poses a problem, a pressure resistant vent is proposed in which gas is released from the dry well and the wet well to suppress the pressure increase. Furthermore, as a measure to avoid the operation of pressure vents even in severe accidents where the probability of occurrence is low, in order to suppress the pressure rise in the reactor containment vessel, the operating floor and the wet well are separated by a rupture disk,
There is also the idea of using the driving floor in the event of an accident.

As a conventional technique for suppressing the rapid reaction between hydrogen and oxygen and maintaining the soundness of the reactor containment vessel, for example, as shown in JP-A-59-116581, a flammable gas is used. There is a method in which a hydrogen storage metal is installed in a part of the concentration control system to reduce the hydrogen concentration. further,
Regarding a technique for injecting a substance that suppresses a combustion reaction into an atmosphere of a reactor containment vessel at the time of an accident and capturing active chemical species, JP-A-2-18496 or JP-A-4-03
6695, and a technique for shutting off oxygen in the atmosphere of the reactor containment vessel from combustible gas is described in JP-A-5-11090.

[0006]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention Reactor equipment targeted by the present invention has a dry well and an operating floor above the wet well in the reactor containment vessel. Are separated by an openable device such as a rupture disc or a valve.

In a reactor installation including such a reactor containment vessel, at the time of a design standard accident, the reactor containment vessel cooling system operates to cool the reactor containment vessel without opening the rupture disk. It is possible to suppress the pressure rise. However, since a large amount of hydrogen is generated at the time of an accident with a low probability of occurrence, when the pressure in the wet well rises, the rupture disk will open and a countermeasure will be taken to suppress the pressure rise in the reactor containment vessel. There is.

[0008] In this case, since the operating floor is normally in an air atmosphere so as to be ready for regular inspections, the hydrogen accumulated in the wet well flows into the operating floor by opening the rupture disk. A sudden reaction between the hydrogen and the oxygen on the operating floor may occur, causing damage to the reactor containment vessel and its internal equipment, which may impair the integrity of the reactor containment vessel.

The present invention has been made in view of this, and an object thereof is to prevent damage to the reactor containment vessel and internal equipment of the containment vessel and to maintain the soundness of the reactor containment vessel. Kind Code: A1 A type of nuclear reactor equipment and its operating method are provided.

[0010]

That is, the present invention is to provide a reactor containment vessel, a reactor pressure vessel arranged in the reactor containment vessel and containing a core, and the reactor pressure vessel. Dry well and wet well
An operating floor formed in the upper part of the reactor containment vessel, and reactor equipment provided with a rupture disc provided between the operating floor and the wet well, in the operating floor, an accident occurrence signal, A gas reaction suppressing device is provided to inject a substance that suppresses the reaction between hydrogen and oxygen to achieve the intended purpose.

Further, between the operating floor and the nitrogen supply device, a nitrogen substitution flow path is provided for supplying nitrogen to the operating floor in response to an accident occurrence signal and performing nitrogen substitution on the operating floor. . Further, in such a nuclear reactor facility, the rupture disk provided between the operating floor and the wet well is formed so as to be opened after completion of nitrogen replacement in the operating floor.

Further, a reactor containment vessel, a reactor pressure vessel arranged in the reactor containment vessel and containing a reactor core, a dry well and a wet well for storing the reactor pressure vessel, and the reactor. The operation floor formed in the upper part of the containment vessel, a rupture disk provided between the operation floor and the wet well, and a nitrogen supply device for supplying nitrogen to the dry well and the wet well, At the time of occurrence, in an operating method of a nuclear reactor facility which receives an accident occurrence signal and supplies nitrogen to the wet well and the dry well, when an accident occurs, nitrogen is supplied to the operating floor and nitrogen is supplied to the operating floor. It is designed to be replaced.

[0013]

In other words, in the nuclear reactor facility thus formed, when an accident occurs, a substance that suppresses the reaction between hydrogen and oxygen, such as nitrogen, is injected into the operating floor, and the operating floor is replaced with nitrogen. Even if the hydrogen generated at the time of the accident shifts to the operating floor, the oxygen concentration in the operating floor is low, so a rapid reaction between hydrogen and oxygen does not occur, thus preventing damage to the reactor containment vessel and internal equipment of the containment vessel. The soundness of the containment vessel can be maintained.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 shows the reactor equipment in cross section. The reactor containment vessel to which the present invention is applied includes a reactor pressure vessel 2 containing a reactor core 1 and a reactor pressure vessel 2
For storing the dry well 3, the pressure suppression chamber 4 for holding the pressure suppression pool 4 and the wet well 6, the vent pipe 7 for connecting the dry well 3 and the pressure suppression pool 4, and the operation of the upper part of the reactor containment vessel 33. The floor 8 and the rupture disc 9 between the wet well 6 and the operating floor 8 are configured.

The constituent elements of this embodiment are the nitrogen injection pipe 10 connected from the operating floor 8 to the existing pipe 17 and the existing pipe 18.
And a gas discharge pipe 11, valves 19 and 20 installed in the respective pipes, an oxygen concentration level detector 16 and an alarm device 15 installed in the operating floor 8.

According to this method, when cooling of the core 1 in the reactor pressure vessel 2 fails and an accident with a very low probability of occurrence of the molten core 21 occurs, zirconium and water, which are materials for the fuel cladding tube, etc. The reaction produces hydrogen. Also,
A countermeasure against overheating has been proposed in which water is injected from the outside of the reactor containment vessel 33 after an accident occurs, and further zirconium reacts with water to generate a large amount of hydrogen.

Therefore, the fact that an accident has occurred is notified to the operating floor 8 by an alarm device 15 to confirm that the evacuation of workers has been completed, and the valve 19 installed in the nitrogen injection pipe 10
The valve 20 installed in the gas exhaust pipe 11 is opened, nitrogen is injected from the nitrogen injection system 12, and nitrogen replacement is started. This time,
While checking the level with the radiation level detector 14, the air on the operating floor 8 is discharged to the gas discharge system 13.

On the other hand, although the temperature rise in the reactor containment vessel 33 is suppressed by the residual heat removal system and the like, the hydrogen generation amount increases as shown in FIG. 2, and hydrogen is wet well 6 as shown in FIG. Then, the pressure increase in the reactor containment vessel 33 is continued. 3 shows the reaction limit of hydrogen and oxygen, the oxygen concentration level detector 16 installed on the operating floor 8 confirms that the oxygen concentration level falls below the hatched range, and the nitrogen injection pipe 10 The valve 19 installed in the gas exhaust pipe 11 and the valve 19 installed in the gas exhaust pipe 11 are closed. At this time, the rupture disk 9 installed between the operating floor 8 and the wet well 6 is not open, and the pressure in the reactor containment vessel 33 is lower than the rupture disk 9 operating pressure. Each event time is 4 hours, including 1 hour for evacuation and valve operation, 2.5 hours for nitrogen replacement, and 0.5 hour for preliminary operation. Here, the time of nitrogen replacement of 2.5 hours is calculated from the time related to nitrogen replacement of the dry well 3 and the wet well 6 performed in the present nuclear power plant, from the volume of the dry well 3 and the wet well 6 and the operation. It is calculated by the ratio of the volumes of floors 8.

That is, by using the equipment for nitrogen replacement of the dry well 3 and the wet well 6 which is the normal equipment of the plant, nitrogen replacement on the operating floor can be carried out in a short time. FIG. 4 shows the pressure change in the reactor containment vessel 33. It takes about 10 hours until the rupture disk 9 opens when the dynamic system does not operate, and nitrogen replacement is performed before the rupture disk 9 opens. Can be surely ended. Therefore, even if the pressure in the reactor containment vessel 33 reaches the rupture disk 9 operating pressure, the rupture disk 9 is opened, and hydrogen is transferred to the operating floor 8, the oxygen concentration is low and the rapid reaction between hydrogen and oxygen occurs. Does not occur, damage to the reactor containment vessel 33 and the internal equipment can be prevented, and the soundness of the reactor containment vessel 33 can be maintained.

The present invention is also applicable to a concrete storage container 34 in which the dry well 3 and the operating floor 8 or the wet well 6 and the operating floor 8 are separated by a rupture disk 9 as shown in FIGS. 5 and 6. It is possible.

Another embodiment of the present invention will be described with reference to FIG. The reactor containment vessel to which this embodiment is applied has the same configuration as that of the embodiment described with reference to FIG. 1, and the constituent features of this embodiment are installed between the wet well 6 and the operating floor 8. It is a rupture disc 9 that operates at a pressure other than the differential pressure.

In this method, the rupture disc 9 can be forcibly opened by a mechanical operation. That is, for example, as shown in FIG. 7, a knife-shaped object A2
2 is installed on the upstream side of the rupture disk 9, that is, on the wet well 6 side, and at the time of completion of nitrogen substitution, the operating device 23
Then, the object A22 is brought into contact with the rupture disc 9 to open the rupture disc 9.

As a result, compared with the rupture disc 9 that operates at a differential pressure, the operation timing is earlier, and the momentary pressure increase when the rupture disc 9 is opened and the operating floor 8 is opened can be suppressed, and the operating floor can be suppressed. 8 and containment vessel 3
The soundness of 3 can be maintained.

Another embodiment of the present invention will be described with reference to FIG. The reactor containment vessel to which this embodiment is applied is shown in FIG.
With the same configuration as that of the embodiment described with reference to FIG. 3, the characteristic component of this embodiment is a valve installed in each of the nitrogen injection pipe 10 and the gas discharge pipe 11 in consideration of airtightness and controllability.

According to this method, nitrogen can be quickly injected after an accident with a low probability of occurrence and gas leakage from the operating floor 8 to the outside of the reactor containment vessel 33 can be prevented when the rupture disk 9 is opened. Upon receiving the accident occurrence signal, the quick opening valve 24 installed in the nitrogen injection pipe 10 and the gas exhaust pipe 11 is instantly opened. Then, when the oxygen concentration level detector 16 causes the oxygen concentration level to fall below the reaction limit, the rapid opening valve 24 is closed and the nitrogen replacement work is completed, which leads to an improvement in valve controllability. Further, the motor-operated valves 25 installed in the nitrogen injection pipe 10 and the gas discharge pipe 11 are closed in order to enhance airtightness.

Therefore, even if the rupture disk 9 is opened, the gas on the operating floor 8 will not leak out of the reactor containment vessel 33 through the pipe. The above operation can be realized by using a check valve or the like instead of the electric valve 25.

Another embodiment of the present invention will be described with reference to FIG. The reactor containment vessel to which this embodiment is applied is shown in FIG.
The constituent element that is characteristic of this embodiment with the same configuration as the embodiment described by using is the hydrogen reaction inhibitor injected into the operating floor 8 instead of nitrogen.

In this method, for example, by injecting a halogen compound or a metal compound vapor instead of nitrogen from the combustion inhibitor injection system 26, active chemical species for continuing the reaction between hydrogen and oxygen can be captured. The reaction between hydrogen and oxygen is suppressed.

The above reaction does not occur by direct reaction of stable molecules H2 and O2, but occurs by reaction of active chemical species such as H, OH and O. Therefore, by injecting a substance capable of capturing active chemical species, a rapid reaction between hydrogen and oxygen can be suppressed. Further, after the accident, the radioactive material diffused in the pressure suppression pool 5 easily moves to the wet well 6 when the pool water becomes acidic. Therefore, the material injected into the operating floor 8 does not make the pool water acidic. Use substances,
Alternatively, if the pool water is mixed with an alkaline substance to make it neutral, then the reaction between hydrogen and oxygen can be suppressed without any problem.

FIG. 10 further shows another embodiment of the present invention. The reactor containment vessel to which this embodiment is applied has the same configuration as that of the embodiment described with reference to FIG. 1, and the constituent features of this embodiment are that the zirconium-water reaction installed in the reactor containment vessel 33 It is a hydrogen storage facility that can selectively store or permeate only the generated hydrogen.

According to this method, several thin plate-shaped hydrogen storage alloys 27 are arranged side by side at several locations on the wall surfaces of the dry well 3 and the wet well 6 in the reactor containment vessel 33, and the storage area is made large so that an accident occurs. Sometimes rupture disc 9
Even if the open position is opened, hydrogen can be adsorbed by the hydrogen storage alloy 27 installed in the dry well 3 and the wet well 6, the concentration of a large amount of generated hydrogen can be lowered, the reaction suppressing effect can be enhanced, and the soundness of the reactor containment vessel 33 can be improved. Can be maintained.

Further, as shown in FIG. 10, the hydrogen permeable film 28
On the surface of the hydrogen storage alloy 27 or the hydrogen permeable film 28.
By storing hydrogen in the hydrogen storage alloy 27 through the hydrogen storage alloy 27, it is possible to store high-purity hydrogen, so that the hydrogen storage function is also efficiently performed. Furthermore, since the influence of impurities can be excluded, the performance of the hydrogen storage alloy 27 can be improved. Further, by installing the hydrogen storage alloy 27 on the operating floor 8 as well, the hydrogen storage alloy 27 or the hydrogen permeable membrane 2 can be used when the hydrogen accumulated in the reactor containment vessel 33 is discharged at the end of the accident.
Since the hydrogen concentration is lowered in No. 8, hydrogen in the reactor containment vessel 33 can be safely discharged.

Although the individual embodiments have been described, if these embodiments, that is, the embodiments shown in FIGS. 1, 7 and 8 are combined, further, the reactor containment vessel 33 is further provided. Could improve the safety and reliability of the.

FIG. 11 also shows another embodiment of the present invention. The reactor containment vessel to which this embodiment is applied has the same configuration as that of the embodiment described with reference to FIG. 1, and the characteristic component of this embodiment is the reaction of hydrogen and oxygen installed for each rupture disk 9. It is a hydrogen reaction facility 29 capable of promoting

In this method, for example, hydrogen reaction equipment 29
By using an igniter, a recombiner, or the like, the reaction between hydrogen and oxygen can be promoted. Since there is only a route from the rupture disc 9 to transfer hydrogen to the operating floor 8, it is more efficient to install an igniter or recombiner at the rupture disc 9 installation place than to install it at each place on the operating floor 8. Oxygen reaction can be expected.

12 and 13 show details of the hydrogen reaction facility 29. When the rupture disk 9 is opened, hydrogen flows into the hydrogen reaction equipment 29. At the same time, the structure 30 in the hydrogen reaction equipment 29 can suck oxygen in the operating floor 8 to promote the reaction between hydrogen and oxygen in the reaction space 31 in the upper part of the hydrogen reaction equipment 29.
In addition, by installing the hydrogen reaction equipment 29 continuously along the inner wall surface of the reactor containment vessel 33, the heat generated during the reaction of hydrogen and oxygen is naturally generated from the outside of the reactor containment vessel 33. The heat can be removed by ventilation or the like, the pressure increase in the reactor containment vessel 33 can be suppressed, and the soundness of the reactor containment vessel 33 can be maintained.

Further, another embodiment of the present invention will be described with reference to FIG. The reactor containment vessel to which this embodiment is applied is
With the same configuration as the embodiment described with reference to FIG. 1, the characteristic components of this embodiment are an oxygen concentration level detector 16, an alarm device 15, and a control system combining them.

In this method, there are two types of control methods for preparing for an abnormality or accident in the driving floor 8 during normal operation.
In the former control, if nitrogen or the like leaks from the dry well 3 or the wet well 6 to the operating floor 8, an abnormality is detected by the oxygen concentration level detector 16, and the alarm 15
By informing the worker on the operating floor 8 of the danger, evacuating the worker and controlling the valve B20 installed in the gas exhaust pipe 11 etc. of the present invention to perform the gas exhaust processing, The reliability and safety of the workers who work are improved.

Similarly to the above-mentioned detector, the radiation level detector 14 also sounds an alarm to the operating floor 8 when an abnormality occurs, and the gas exhaust pipe 11 and the existing pipes connected to the dry well 3, the wet well 6 and the operating floor 8 are provided. Whether or not there is a leak from the valve of B18 can be confirmed.

On the other hand, in the latter control, when an accident with a low probability of occurrence is assumed, the alarm signal is received by the alarm device 15 and an alarm is sounded at the operating floor 8. Then, at the same time that the safety of the worker is ensured, the control device 32 causes the valve A19 and the valve B2 to operate.
Open 0 and start nitrogen substitution. At this time, it is confirmed that there is no abnormality in the signals of the radiation level detector 14 and the oxygen concentration level detector 16, and when the signal of the oxygen concentration level detector 16 becomes less than the reaction level concentration with hydrogen, the valve A19,
Close valve B20. Therefore, abnormality can be detected from various viewpoints, which leads to improvement in safety and controllability.

As described above, according to the reactor equipment and the method of operating the same of the present invention, by receiving an accident occurrence signal with a low probability of occurrence and replacing the operating floor with nitrogen, a large amount of zirconium-water reaction occurs. Since it is possible to suppress a rapid reaction between the hydrogen and the oxygen existing in the operating floor, damage to the reactor containment vessel and the internal equipment can be prevented, and the soundness of the reactor containment vessel can be maintained.

Further, since the rupture disc is opened after the replacement is completed, and the opening is performed by operating the differential pressure, that is, by applying a mechanical action, it can be realized more reliably and the reliability is improved. Connect
Further, since the rupture disc can be opened at the same time as the nitrogen replacement work is completed or before the rupture disc operating pressure, it is possible to suppress a rapid pressure increase at the operating floor when the rupture disc is opened.

Further, since the replacement of nitrogen in the operating floor and the replacement of nitrogen in the wet well and the dry well are performed from the same nitrogen supply device, the present invention can be easily realized and leads to cost reduction. . In addition, by installing a hydrogen storage alloy in the reactor containment vessel, the concentration of hydrogen generated during an accident can be reduced and the reaction suppression effect can be increased,
The integrity of the containment vessel can be maintained. Further, by combining the hydrogen permeable membrane, the hydrogen storage effect can be efficiently performed, and the performance of the hydrogen storage alloy can be further enhanced.
When the hydrogen is discharged from the reactor containment vessel at the end of the accident, the hydrogen concentration is lowered by the hydrogen storage alloy or hydrogen permeable membrane, so it is possible to safely discharge the hydrogen in the reactor containment vessel and reduce the pressure. Can be made.

By installing hydrogen reaction equipment at the same number as or more than the rupture disks at the rupture disk installation location, the concentrations of hydrogen and oxygen are controlled, the reaction of hydrogen and oxygen is promoted, and the pressure inside the reactor containment vessel is increased. The rise can be suppressed. In addition, by cooling the reaction heat in the event of an accident via the wall of the reactor containment vessel, that is, the heat from the reaction of hydrogen and oxygen is removed by cooling from outside the reactor containment vessel. The integrity of the storage container can be maintained.

Further, by installing an oxygen concentration level detector and an alarm device on the operating floor, a worker working on the operating floor sounds an alarm indicating a danger when an accident occurs or an abnormality occurs on the operating floor. Improves reliability and safety. Further, since the valve can be controlled by the accident occurrence signal or the signal from the oxygen concentration level detector, the operability of the nitrogen replacement work is improved.

[0046]

As described above, according to the present invention, when an accident occurs, a substance that suppresses the reaction between hydrogen and oxygen is injected into the operating floor, and the operating floor is replaced with the substance. Even if the generated hydrogen moves to the operating floor, the oxygen concentration in the operating floor is low, and a rapid reaction between hydrogen and oxygen does not occur.Therefore, damage to the reactor containment vessel and internal equipment of the containment vessel can be prevented, and the reactor containment It is possible to obtain a reactor facility of this kind that can maintain the integrity of the vessel.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a nuclear reactor facility of the present invention.

FIG. 2 is a characteristic diagram showing a relationship between an elapsed time from the occurrence of an accident and a hydrogen generation amount.

FIG. 3 is a characteristic diagram showing a reaction limit between hydrogen and oxygen.

FIG. 4 is a characteristic diagram showing the elapsed time from the occurrence of an accident and the pressure change in the reactor containment vessel.

FIG. 5 is a vertical sectional side view showing another embodiment of the nuclear reactor equipment of the present invention.

FIG. 6 is a vertical sectional side view showing another embodiment of the nuclear reactor equipment of the present invention.

FIG. 7 is a partial cross-sectional view of the reactor containment vessel showing another embodiment of the nuclear reactor equipment of the present invention.

FIG. 8 is a partial cross-sectional view of the reactor containment vessel showing another embodiment of the nuclear reactor equipment of the present invention.

FIG. 9 is a vertical sectional side view showing another embodiment of the nuclear reactor equipment of the present invention.

FIG. 10 is a vertical sectional side view showing another embodiment of the nuclear reactor equipment of the present invention.

FIG. 11 is a vertical sectional side view showing another embodiment of the nuclear reactor equipment of the present invention.

FIG. 12 is a vertical sectional side view of a hydrogen reaction facility according to an embodiment of the present invention.

13 is a cross-sectional view taken along the line AA of FIG.

FIG. 14 is a vertical cross-sectional side view of a reactor facility showing a control system of the reactor facility of the present invention.

[Explanation of symbols]

1 ... Reactor core, 2 ... Reactor pressure vessel, 3 ... Dry well, 4 ... Pressure suppression chamber, 5 ... Pressure suppression pool, 6 ... Wet well, 8 ... Operating floor, 9 ... Rupture disk, 10
... Nitrogen injection pipe, 11 ... Gas exhaust pipe, 14 ... Radiation level detector, 33 ... Containment container.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Kashiwai 7-2-1, Omika-cho, Hitachi-shi, Ibaraki Hitachi, Ltd. Power & Electric Machinery Development Division

Claims (12)

[Claims] 1. A reactor containment vessel, a reactor pressure vessel arranged in the reactor containment vessel and containing a reactor core, a dry well and a wet well for storing the reactor pressure vessel, and In a reactor facility including an operating floor formed in the upper part of the reactor containment vessel and a rupture disc provided between the operating floor and the wet well, the operating floor receives an accident occurrence signal. A nuclear reactor facility characterized in that a gas reaction suppressing device for injecting a substance that suppresses a reaction between hydrogen and oxygen is provided. 2. A reactor containment vessel, a reactor pressure vessel arranged in the reactor containment vessel and containing a core, a dry well and a wet well for storing the reactor pressure vessel, and the reactor. The operation floor formed in the upper part of the containment vessel, a rupture disk provided between the operation floor and the wet well, and a nitrogen supply device for supplying nitrogen to the dry well and the wet well, In a nuclear reactor facility configured to supply nitrogen to the wet well and the dry well from the nitrogen supply device at the time of occurrence, an operating floor receiving an accident occurrence signal between the operating floor and the nitrogen supply device Reactor equipment characterized in that a nitrogen replacement flow passage is provided for supplying nitrogen to and supplying nitrogen to the operating floor. 3. The nuclear reactor facility according to claim 2, wherein the rupture disk provided between the operating floor and the wet well is formed so as to be opened after completion of nitrogen replacement in the operating floor. 4. The nuclear reactor installation according to claim 3, wherein the opening of the rupture disk is operated by a differential pressure. 5. A reactor containment vessel, a reactor pressure vessel arranged in the reactor containment vessel and containing a reactor core, a dry well and a wet well for storing the reactor pressure vessel, and the reactor. The operation floor formed in the upper part of the containment vessel, a rupture disk provided between the operation floor and the wet well, and a nitrogen supply device for supplying nitrogen to the dry well and the wet well, In a nuclear reactor facility configured to supply nitrogen from the nitrogen supply device to the wet well and the dry well at the time of occurrence, a device capable of selectively storing or separating only hydrogen is installed in the reactor containment vessel. At the same time, nitrogen is supplied to the operating floor between the operating floor and the nitrogen supply device in response to an accident occurrence signal to replace the operating floor with nitrogen. Reactor facility is characterized in that so as to provide a diversion path. 6. A reactor containment vessel, a reactor pressure vessel arranged in the reactor containment vessel and containing a reactor core, a dry well and a wet well for storing the reactor pressure vessel, and the reactor. An operating floor formed in the upper part of the containment vessel, a rupture disc or valve provided between the operating floor and the wet well, and a nitrogen supply device for supplying nitrogen to the dry well and the wet well. In a reactor facility in which nitrogen is supplied from the nitrogen supply device to the wet well and the dry well at the time of an accident, the hydrogen concentration and operation when the rupture disc or valve is opened are Install hydrogen reaction equipment that can control the oxygen concentration on the floor and accelerate the reaction between hydrogen and oxygen. Nuclear reactor equipment, characterized in that it was. 7. The hydrogen reaction equipment is installed on the inner wall surface of the reactor containment vessel, and heat generated during a rapid reaction between hydrogen and oxygen is cooled through the wall of the reactor containment vessel. Reactor equipment. 8. A reactor containment vessel, a reactor pressure vessel arranged in the reactor containment vessel and containing a reactor core, a dry well and a wet well storing the reactor pressure vessel, and the reactor. The operation floor formed in the upper part of the containment vessel, a rupture disk provided between the operation floor and the wet well, and a nitrogen supply device for supplying nitrogen to the dry well and the wet well, At the time of occurrence, in an operating method of a nuclear reactor facility that receives an accident occurrence signal and supplies nitrogen to the wet well and the dry well, the operation floor receives the accident occurrence signal and reacts with hydrogen and oxygen. A method for operating a nuclear reactor facility, which comprises injecting a substance that suppresses 9. A reactor containment vessel, a reactor pressure vessel arranged in the reactor containment vessel and containing a reactor core, a dry well and a wet well storing the reactor pressure vessel, and the reactor. The operation floor formed in the upper part of the containment vessel, a rupture disk provided between the operation floor and the wet well, and a nitrogen supply device for supplying nitrogen to the dry well and the wet well, When an accident occurs, in a method of operating a nuclear reactor facility that receives an accident occurrence signal and supplies nitrogen to the wet well and the dry well, when an accident occurs, nitrogen is supplied to the operating floor and nitrogen is supplied to the operating floor. A method for operating a nuclear reactor facility, which is characterized in that replacement is performed. 10. A reactor containment vessel, and a reactor pressure vessel arranged in the reactor containment vessel and containing a reactor core.
A dry well and a wet well for storing the reactor pressure vessel, an operating floor formed in the upper part of the reactor containment vessel, a rupture disk provided between the operating floor and the wet well, and A method for operating a nuclear reactor facility, comprising a nitrogen supply device for supplying nitrogen to a dry well and a wet well, and receiving an accident occurrence signal to supply nitrogen to the wet well and the dry well when an accident occurs. When an accident occurs, nitrogen is supplied to the operating floor to replace the operating floor with nitrogen, and after the nitrogen replacement is completed, the rupture disk is opened so that the operating floor and the wet well are communicated with each other. Operating method of nuclear reactor equipment. 11. The method of operating a nuclear reactor facility according to claim 10, wherein the replacement of nitrogen in the operating floor and the replacement of nitrogen in the wet well and dry well are performed from the same nitrogen supply device. 12. An oxygen concentration level detector is installed on the operating floor, and during normal operation, leakage of nitrogen and the like from the dry well and the wet well to the operating floor is detected by a signal from the oxygen concentration level detector to operate. In addition to sounding an alarm on the floor, an alarm is sounded on the driving floor even when an accident occurs, and the valves of the nitrogen injection path and the gas discharge path are controlled by the accident occurrence signal, the radiation level detector signal or the oxygen concentration level detector signal. The method of operating a nuclear reactor facility according to claim 8, 9, 10 or 11.