JPH09145881A - Nuclear power plant building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the economy, control and operability of a nuclear power plant by reducing equipment installation as well as the installation space of an equipment room or a repair room. SOLUTION: A two-plant reactor building 13 with a first nuclear power plant 14 and a second nuclear power plant 15 disposed is provided therein with a common repair room 16 that can be communicated with secondary housing facilities 32 of the plants 14, 15, in a position in contact with the secondary housing facilities 32. This repair room 16 is provided with airtight entrance doors 4 to the respective plants 14, 15, and a changeover operating or electrical interlock is provided for door opening/closing between the respective plants. Drain disposal and air conditioning in the repair room 16 can be switched to one plant and are interlocked with the electrical interlock. Equipment repair in the repair room 16 can therefore be performed without mixing between two plants of the secondary housing facilities so as to improve economy, plant control and operability through the reduction of a repair room area and equipment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided for the purpose of arranging first and second nuclear power plants in a single two-plant reactor building and providing them to any one of these plants. The present invention relates to a nuclear power plant building having a repair room or an equipment room.

[0002]

2. Description of the Related Art A nuclear reactor building is composed of a reactor containment vessel surrounding the reactor pressure vessel and a secondary containment facility surrounding the outside of the reactor containment vessel. It is configured. In this secondary containment facility, an equipment room directly related to the reactor equipment and a repair room where these can be inspected and repaired are separately provided. Typical ones will be described below with reference to FIGS.

Referring to FIG. 8, as a first conventional example, one nuclear power plant is arranged in one reactor building, and a control rod drive mechanism or a recirculation pump with a built-in reactor is repaired in this reactor building. An example in which a room (hereinafter referred to as a CRD / RIP repair room) is provided will be described.

In FIG. 8, a CRD is installed in the reactor building 1.
A RIP repair room 2 and a reactor containment vessel 3 are provided. This repair room 2 is located near the equipment loading / unloading port 5 provided in the reactor containment vessel 3, and is used for periodic inspections of nuclear power plants and disassembly / inspection / inspection of equipment such as pumps during plant operation.
Used during repairs. The entrance door 4 to the repair room 2 is a door that is not airtight, and drain water treatment and air supply / exhaust air conditioning are handled by the equipment of the own plant.

Next, as a second conventional example, an example in which a main steam isolation valve or a relief safety valve repair room (hereinafter referred to as MSIV / SRV repair room) is provided in the reactor building 1 will be described with reference to FIG. The MSIV / SRV repair room 6 is installed near the equipment loading / unloading port 8 provided in the reactor containment vessel 3. The repair room 6 is used during the periodic inspection of the plant. The entrance door 7 to the repair room 6 is a door that is not airtight, and the drain water treatment and the air supply / exhaust air conditioning are handled by the equipment of the own plant.

Next, referring to FIG. 10, as a third conventional example, an example in which an equipment room (hereinafter referred to as an FCS room) having a combustible gas concentration control device is provided in the reactor building 1 will be described. Since the FCS chamber 9 is for controlling the concentration of the combustible gas in the reactor containment vessel 3 at the time of a pipe breakage accident, etc., it is installed near the reactor containment vessel 3. The entrance / exit door 10 to the FCS chamber 9 is a door that is not airtight, and the drain water treatment and the air supply / exhaust air conditioning are handled by the facilities of the own plant.

Next, an example in which an equipment room (hereinafter referred to as an SGTS room) having an emergency gas treatment device is provided in the reactor building 1 will be described as a fourth conventional example with reference to FIG.
The SGTS room 11 is installed in the secondary containment facility because it is for treating the radioactive gas generated in the secondary containment facility at the time of a pipe breakage accident in the reactor containment vessel 3. The entrance / exit door 12 to the SGTS room 11 is not airtight, and the drain water treatment and the air supply / exhaust air conditioning are handled by the equipment of the own plant.

On the other hand, in view of the recent trend of difficulty in securing a location point for a nuclear power plant, not only the economic efficiency of the plant but also the maintainability, management / operability, etc. should be improved. Is desired. Under such circumstances, as a compact plant concept of urban proximity type, 2
The concept of arranging the basic reactor plant in a single reactor building is under consideration.

[0009]

In the conventional repair rooms or equipment rooms, one reactor room or equipment room is required for each reactor building, so the compact plant concept described above is required. In the case of a two-plant reactor building that integrates two reactor buildings in which a single plant is placed into one reactor building as shown below,
Secondary containment facilities will be installed so that both plants can be independent.

In this case, since the repair room or the equipment room is installed separately for each one reactor plant by clearly separating it with a concrete wall or the like, two repair room spaces or equipment room spaces for two reactor plants are provided inside the reactor building. Need to secure.

However, due to the deterioration of the economy due to the increase of the building volume and the provision of the repair room or equipment room for two plants, the management of the workers who enter the repair room or equipment room at the time of regular inspection is 2 Since management equipment for the base plant is required, there is a problem that its management and operability become complicated.

The present invention has been made to solve the above problems, and an object thereof is to provide a nuclear power plant building capable of improving economic efficiency without complicating management and operability of repair room equipment or equipment room equipment. To do.

[0013]

According to the first aspect of the present invention, there is provided the following:
No. 2 nuclear power plant and second nuclear power plant were placed
In the plant reactor building, a shared repair room or equipment room is provided at a position in contact with the secondary containment facilities of each of the plants so as to be able to communicate with both of the secondary containment facilities.

According to a second aspect of the present invention, the common repair room or the equipment room is provided with an entrance / exit door capable of entering / exiting the secondary storage facilities of both plants, and these entrance / exit doors have airtightness, and The second nuclear power plant side is provided with an interlock for controlling the closed state when the nuclear power plant side is open.

According to a third aspect of the present invention, the common repair room or equipment room is provided with drain drainage facilities capable of respectively draining the floor drain or equipment drain in the room to the first nuclear power plant side and the second nuclear power plant side, This drain drainage facility is characterized in that an interlock is provided for controlling the second nuclear power plant side to be closed when draining to the first nuclear power plant side.

According to a fourth aspect of the present invention, there is provided an air supply / exhaust air conditioning duct communicating from the common repair room or the equipment room to the first nuclear power plant side and the second nuclear power plant side, respectively.
An isolation valve is provided in the air supply / exhaust air-conditioning duct, and the isolation valve is provided with an interlock for controlling the second nuclear power plant side to the closed state when the first nuclear power plant is in the open state.

The invention of claim 5 is characterized in that an airtight entrance / exit door, a drain drainage facility, and a supply / exhaust air conditioning duct are provided in the common repair room or equipment room. According to the invention of claim 6, the common repair room or the equipment room is a door as a part of the secondary containment facility of the first nuclear power plant during normal operation,
An interlock is provided to operate the air conditioner and drain drainage port, and switch the door, air conditioner, and drainage drainage port to operate as a secondary storage facility for the second plant when the second nuclear power plant is out of service such as periodic inspection. It is characterized by

In each common repair room or equipment room having the above-mentioned structure, the doors, valves, and isolation valves are controlled by interlocks so that the other plant side is closed when the own plant side is open. Can be used interchangeably with each other and there will be no hindrance to plant operation.

Further, by providing a repair room or equipment room for two plants in one reactor building, the space is reduced to about half as compared with the conventional case where each plant is provided individually. Moreover, each repair facility or each equipment facility is also reduced. Further, since the management equipment for the workers who enter the repair room or the equipment room at the time of the periodic inspection is reduced, the management and operability of the plant can be improved.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a nuclear power plant building according to the present invention will be described with reference to FIGS. FIG. 1 is a plan layout schematically showing a nuclear power plant building according to the present embodiment.

Reference numeral 13 in FIG. 1 is a two-plant reactor building in which two conventional reactor buildings are combined into one, and this reactor building 13
Is the first nuclear power plant 14 and the second nuclear power plant 15
Are adjacent to each other. A reactor containment vessel 3 is installed in each plant 14 and 15, and the reactor containment vessel 3 is surrounded by a secondary containment facility 32.

A shared CR capable of communicating with the secondary storage facilities 32 of both plants 14 and 15 at a position in contact with the secondary storage facility 32.
A D / RIP repair room (hereinafter referred to as a repair room) 16 is provided. That is, this repair room 16 is located adjacent to the reactor containment vessel 3 of both plants 14 and 15 and located in the center of both plants 14 and 15, and is a common repair room for both plants 14 and 15. .

An entrance door 4 having airtightness is provided at the entrance of each of the plants 14 and 15 of the repair room 16. The secondary storage facility boundary 17 is shown in FIG. 2 by a bold line. Further, the repair room 16 is provided with a drain drainage facility as shown in FIGS. 3 (a) and 3 (b) and an air conditioning facility as shown in FIGS. 4 (a) and 4 (b).

Next, the concept of the wastewater treatment method for radioactive waste liquid (drain from the floor and equipment) generated in the repair room 16 will be described with reference to FIGS. 3 (a) and 3 (b). That is, the drain of the repair room 16 shared by the first plant 14 and the second plant 15 is drained to the plant on the regular inspection side by the switching method of the following two. (1) As shown in Fig. 3 (a), general floor drain (drainage to the common sump 19) (2) As shown in Fig. 3 (b), drain from equipment (backwash receiving tank 21)

In FIG. 3A, the airlock of the door 4 on the first plant 14 side is opened, and the airlock of the door 4 on the second plant 15 side is closed.
The floor drain pipe 18 is provided between the sump 19 and the drain cap 20, and secures the drain cap 20 or the water seal on the first plant 14 side for draining.

In (b), the backwash receiving tank 21 and the water tank
The pipe 24, the valve 23 and the pump 25 are connected to the pipe 24 to drain water from the water tank 24. 2 plants 1
In order to maintain the boundary of the secondary containment facility between 4th and 15th, the floor drain pipe 18 is water-sealed with the sump 19 and the drain cap 20 is provided, while the drain from the equipment is connected to the backwash receiving tank 21. A valve 23 is provided on the valve and the valve 23 is closed to shut off the ventilation between the two plants.

Next, referring to FIGS. 4 (a) and 4 (b), the repair room 16
Explain the concept of air supply and exhaust in the area. Air supply / exhaust in the repair room 16 area is always configured to correspond to the air conditioning duct 26 of the plant on the regular inspection side, and the air conditioning duct 27 of the other plant side is used.
A secondary containment facility boundary between the two plants will be maintained by installing an isolation valve 28 in the plant.

In the repair room 16 having the above-mentioned structure, the door 4 and the valve 23 of the pipe 22 and the isolation valve 28 of the air conditioning duct are closed on the side of the second nuclear plant 15 when the side of the first nuclear plant 14 is open. To turn on the lamp, visually check,
By operating with an electrical interlock, it can be used mutually in both plants and there will be no problems in plant operation.

According to the present embodiment, the repair room has
The space is reduced to about 70% compared to the case where it is installed alone in the plant, and the repair equipment is also halved. Therefore, the equipment space in the building is reduced, and the management equipment for the workers who enter the repair room at the time of the periodic inspection is also reduced, so that the management and operability of the plant can be improved.

Next, a second embodiment of the nuclear power plant building according to the present invention will be described with reference to FIG. Note that the drainage drain and the air-conditioning equipment of the present embodiment are referred to FIGS. 3 and 4 and the description thereof.

FIG. 5 shows a shared MSIV / according to this embodiment.
The schematic plan view of the SRV repair room 29 is shown. Shared M
SIV / SRV repair room 29 has two nuclear power plants 14, 15
Are located in the two-plant reactor building 13, and both plants
Adjacent to 14 and 15 reactor containment vessels 3 and both plants 1
Located in the center of 4,15. The repair room 29 is a shared repair room for two plants. An entrance door 7 having airtightness is provided at each entrance of both plants of the repair room 29.

Further, the concept of the waste water treatment method of radioactive waste liquid (drain from the floor and equipment) generated in the repair room 29 is as shown in FIG. 3, and the air supply and exhaust in the repair room 29 area are also shown. The concept of is as shown in FIG.

In the MSIV / SRV repair room 29 having the above structure, the door 7 and the valve 23 of the pipe 22 shown in FIG. 3 and the isolation valve 28 of the air conditioning duct shown in FIG. 4 are in the open state on the side of the first nuclear power plant 14. Sometimes the second nuclear power plant 15 side can be used mutually by both plants by operating by turning on the lamp so that it will be in a closed state, visual confirmation, and electrical interlock. Does not occur.

According to the present embodiment, the repair room has a conventional
The space will be reduced to about half compared to the case where it is installed independently at the plant, and the repair equipment will also be halved. Therefore, the facility space in the building is reduced, and the management facility for the personnel who enter the repair room at the time of the periodic inspection is also reduced, so that the management and operability of the plant can be improved.

Next, a third embodiment of the nuclear power plant building according to the present invention will be described with reference to FIG. The operation of this embodiment is based on FIGS. 3 and 4 and the description thereof.
FIG. 6 shows a schematic plan layout view of the shared FCS chamber 30 according to the present embodiment. The shared FCS room 30 has two nuclear power plants 14 and 15 arranged in the two-plant reactor building 13, is adjacent to the reactor containment vessels 3 of both plants 14 and 15, and is located in the center of both plants. . There are 2 shared FCS rooms 30
It is a shared equipment room of the plant. An entrance door 10 having airtightness is provided at the entrance of both plants 14 and 15 of the shared FCS room 30.

The concept of the wastewater treatment method of radioactive waste liquid (drain from the floor and equipment) generated in the shared FCS room 30 is as shown in FIG. 3, and the concept of air supply / exhaust in the shared FCS room 30 area. Is as shown in FIG.

In the shared FCS chamber 30 having the above-mentioned structure, the door 10 and the valve 23 of the pipe 22 shown in FIG. 3 and the isolation valve 28 of the air conditioning duct shown in FIG. At times, the second nuclear power plant 15 side can be used mutually by both plants by operating by turning on the lamp so that it will be in a closed state, visual confirmation, and an electrical interlock. No hindrance will occur.

According to the present embodiment, the space is reduced to about half and the equipment is also halved as compared with the case where the common FCS room 30 is provided separately in two conventional plants. Therefore, the facility space in the building is reduced, and the management facility for the personnel who enter the shared FCS room 30 at the time of the periodic inspection is also reduced, so that the management and operability of the plant can be improved. .

Next, a fourth embodiment of the nuclear power plant building according to the present invention will be described with reference to FIG. The operation of this embodiment is based on FIGS. 3 and 4 and the description thereof.
FIG. 7 shows a schematic plan layout view of the SGTS chamber 31 according to the present embodiment.

The SGTS room 31 has two nuclear power plants 14,
15 is located in the two-plant reactor building 3 and is adjacent to the reactor containment vessel 3 of both plants 14 and 15, and both plants
Located in the center of 14,15. Also, this SGTS room 31 has 2
It is a shared equipment room for plants 14 and 15. Shared SGT
An entrance door 12 having airtightness is provided at the entrance of each of the plants 14 and 15 of the S room 31.

Further, the concept of the wastewater treatment method of radioactive waste liquid (drain from the floor and equipment) generated in the common SGTS room 31 is as shown in FIG.
The concept of air supply / exhaust in the 31 areas is as shown in Fig. 4.

In the common SGTS room 31 having the above structure,
The door 12 and the valve 23 of the pipe 22 shown in FIG. 3 and the isolation valve 28 of the air conditioning duct shown in FIG. 4 are set so that the second nuclear plant 15 side is closed when the first nuclear plant 14 side is open. By operating by turning on the lamp, visual confirmation, and electrical interlock, it is possible to use both plants mutually and there will be no problems in plant operation.

According to the present embodiment, the space is reduced to about half and the equipment is also halved compared to the case where the common SGTS room 31 is provided separately in two conventional plants. Therefore, the equipment space inside the building is reduced, and the management equipment is also reduced from the management side of the workers who enter the common SGTS room 31 at the time of periodic inspection, so the management and operability of the nuclear power plant is improved. be able to.

[0044]

According to the present invention, the repair room or equipment room is shared by two plants, the doors from each plant are made airtight, and drain processing and air conditioning can be switched to one plant. Therefore, it is possible to repair the equipment in the repair room without mixing the two plants of the secondary storage facility. Therefore,
Since the repair room area, the equipment room area, and the economy are improved by reducing the equipment, and the management area range is reduced by the area reduction, plant management and operability can be improved.

[Brief description of the drawings]

FIG. 1 is a plan layout view schematically showing a first embodiment of a nuclear power plant building according to the present invention.

2 is a plan layout view for explaining a secondary storage facility boundary of the building in FIG. 1. FIG.

3 (a) is a conceptual diagram for explaining the wastewater treatment means for the floor drain of the building in FIG. 1, and FIG. 3 (b) is a conceptual diagram for explaining the same wastewater treatment means from aquariums.

4A is a conceptual diagram for explaining the air supply / exhaust means of the first unit of the building in FIG. 1, and FIG. 4B is a conceptual diagram for explaining the air supply / exhaust unit of the second unit.

FIG. 5 is a plan layout view schematically showing a second embodiment of the nuclear power plant building according to the present invention.

FIG. 6 is a plan layout view schematically showing a third embodiment of a nuclear power plant building according to the present invention.

FIG. 7 is a plan layout view schematically showing a fourth embodiment of a nuclear power plant building according to the present invention.

FIG. 8 is a plan layout view schematically showing a first example of a conventional nuclear power plant building.

FIG. 9 is a plan layout view schematically showing a second example of the conventional nuclear power plant building.

FIG. 10 is a plan layout view schematically showing a third example of the conventional nuclear power plant building.

FIG. 11 is a plan layout view schematically showing a fourth example of the conventional nuclear power plant building.

[Explanation of symbols]

1 ... Reactor building, 2 ... CRD / RIP repair room, 3 ... Reactor containment vessel, 4 ... Entrance / exit door, 5 ... Equipment entrance / exit, 6 ... M
SIV / SRV repair room, 7 ... entry door, 8 ... equipment carrying in / out port, 9 ... FCS room, 10 ... entry door, 11 ... SGTS room, 12
… Gateway, 13… 2 plant reactor building, 14… First nuclear power plant, 15… Second nuclear power plant, 16… Common C
RD / RIP repair room, 17 ... Secondary storage facility boundary, 18
… Floor drain piping, 19… Sump, 20… Drain cap, 21
… Backwash tank, 22… Piping, 23… Valve, 24… Water tank, 25…
Pump, 26 ... First air conditioning duct, 27 ... Second air conditioning duct, 28 ... Isolation valve, 29 ... Shared MSIV / SRV repair room, 30
… Common FCS room, 31… Common SGTS room, 32… Secondary storage facility.

Claims (6)

[Claims] 1. A two-reactor building in which a first nuclear power plant and a second nuclear power plant are arranged, which can contact both of the secondary containment facilities at a position in contact with the secondary containment facility of each of the plants. A nuclear power plant building with a shared repair room or equipment room. 2. The common repair room or equipment room is provided with entrance / exit doors capable of entering / exiting the secondary storage facilities of both plants, and these entrance / exit doors are airtight and the first nuclear power plant side is open. The nuclear power plant building according to claim 1, wherein the second nuclear power plant side is provided with an interlock for controlling the closed state when in the state. 3. The common repair room or equipment room is provided with drain drainage equipment capable of draining the floor drain or equipment drain in this room to the first nuclear power plant side and the second nuclear power plant side, respectively. The nuclear power plant building according to claim 1, wherein an interlock for controlling the second nuclear power plant side to a closed state is provided when draining to the first nuclear power plant side. 4. The first from the common repair room or equipment room
Supply / exhaust air conditioning ducts communicating with the nuclear power plant side and the second nuclear power plant side, respectively, and an isolation valve is provided in the air supply / exhaust air conditioning duct. 2. The nuclear power plant building according to claim 1, wherein the nuclear power plant side is provided with an interlock for controlling the closed state. 5. The nuclear power plant building according to claim 1, wherein an airtight entrance / exit door, a drain drainage facility, and an air supply / exhaust air conditioning duct are provided in the common repair room or equipment room. 6. The common repair room or equipment room operates as a part of the secondary containment facility of the first nuclear power plant during normal operation such as a door, an air conditioner, and a drain drainage port, and regularly checks the second nuclear power plant. 2. The nuclear plant building according to claim 1, further comprising an interlock for switching the door, the air conditioner, and the drain drainage port to operate as a second secondary storage facility when the operation of the plant is stopped.