JPH1194988A - Emergency power equipment of reactor power station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide emergency power equipment of reactor power station capable of receiving power provision from other reactor power station even in the case one of two or more adjacent reactor power station units goes into total loss of AC power with battery failure. SOLUTION: When power is supplied from one reactor power station to the direct power panel 20 of other failed power station, breakers 23 and 24 are switched on to supply power from the emergency low voltage bus 11C and 11D to the preliminary charger 15 of other reactor power station by way of the breakers 23 and 24. By this, power is supplied via the preliminary charger 15 to a direct current power source panel 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency power supply system of a nuclear power plant for supplying power to each device when an abnormality occurs in an in-plant power supply.

[0002]

2. Description of the Related Art An emergency high-voltage bus of a nuclear power plant is basically provided independently for each plant and for each emergency power supply. FIG. 12 is a single line connection diagram of an in-house power supply for an emergency high-voltage bus of one nuclear power plant.

During normal operation of a nuclear power plant, the emergency high-voltage buses 3A and 3B are connected to the service / emergency high-voltage bus connections 1A and 1A.
Power is received from B via the emergency high-voltage bus power receiving circuit breakers 2A and 2B, respectively. This emergency high-voltage bus 3A, 3B
Are power transformers 7A and 7B via circuit breakers 5A and 5B, respectively.
To the emergency low-voltage buses 9A and 9B via power transformers 7A and 7B and circuit breakers 8A and 8B. Diesel generators 6A and 6B, which are emergency power supplies, are connected to the emergency high-voltage buses 3A and 3B via circuit breakers 4A and 4B, respectively. Usually, three emergency diesel generators 6A and 6B are provided (only two are shown in FIG. 12).

The emergency low-voltage buses 9A and 9B are respectively connected to the emergency low-voltage buses 11A and 11B via circuit breakers 10A and 10B.
1A and connected to the emergency low-voltage buses 11A and 11B via circuit breakers 12A and 12B, respectively.
It is connected to the 4A, B system service device 14B. The emergency low-voltage buses 11A and 11B are connected to circuit breakers 13A and 13B, respectively.
Both are connected to the pre-charger 15 via B.

Here, the type of power supplied to the emergency low-voltage buses 11A and 11B is AC, but by passing through these chargers 14 and 15, the type of power is converted to DC. From the A-system service charger 14A and the B-system service charger 14B, respectively, via circuit breakers 18A and 18B,
DC power is supplied from the pre-charger 15 to the DC power supply panels 20A and 20B via circuit breakers 19A and 19B, respectively.

Further, the storage batteries 16A, 16B are connected to the DC power supply panels 20A, 20B by the emergency low-voltage buses 11A, 1B.
1B, the DC power supply panel 20
A and 20B are supplied with DC power. That is, when the DC power supply panel 20A cannot receive power from the emergency low-voltage bus 11A via the electric circuit including the circuit breaker 12A, the A-system service charger 14A, and the circuit breaker 18A, the circuit breaker 13
A, when power cannot be received via the electric circuit including the pre-charger 15 and the circuit breaker 19A, or when power cannot be received via the electric circuit including the circuit breaker 13B, the pre-charger 15, and the circuit breaker 19A, , DC power panel 20B from emergency low-voltage bus 11B to circuit breaker 12B, B-system regular charger 14
B, when power cannot be received via the electric circuit constituted by the circuit breaker 18B, the circuit breaker 13B, the pre-charger 15, the circuit breaker 19
Each is installed in case that power cannot be received via the electric circuit constituted by B or when power cannot be received via the electric circuit constituted by the circuit breaker 13A, the pre-charger 15 and the circuit breaker 19B.

In storage batteries 16A and 16B, DC power is supplied to DC power supply panel 20 through circuit breakers 17A and 17B, respectively.
A, supply power to 20B. By supplying the DC power to the DC power panels 20A and 20B in this manner, various devices (not shown) connected to the DC power panels 20A and 20B,
For example, the configuration is such that DC power can be supplied to safety-related electrical equipment in a nuclear power plant.

Here, if a situation occurs in which the external power supply is lost, the emergency high-voltage buses 3A and 3B cannot receive power from the service / emergency high-voltage bus connections 1A and 1B, causing a power outage, and the emergency low-voltage buses 9A, 9B and 11A. , 11B cannot be supplied, and these buses also lose power. Therefore, the emergency low-voltage bus 11A to the circuit breaker 12A, the A-system regular charger 14
A, in the electric circuit constituted by the circuit breaker 18A, the electric circuit constituted by the circuit breaker 13A, the preliminary charger 15, and the circuit breaker 19A, or the electric circuit constituted by the circuit breaker 13B, the preliminary charger 15, and the circuit breaker 19A Also, the power supply to the DC power supply panel 20A is cut off. Similarly, an electric circuit including the emergency low-voltage bus 11B to the circuit breaker 12B, the B-system service charger 14B, and the circuit breaker 18B, an electric circuit including the circuit breaker 13B, the preliminary charger 15, and the circuit breaker 19B, or a circuit breaker. The power supply to the DC power supply panel 20B is also cut off in any of the electric circuits formed by 13A, the pre-charger 15, and the circuit breaker 19B.

Since the DC power panels 20A and 20B are connected to emergency electric equipment which is important for operating the nuclear power plant, it is necessary to ensure the operation in any state. Therefore, when the external power supply loss is detected, FIG.
In this case, the two emergency diesel generators 6A and 6B are automatically started, and the diesel power receiving circuit breakers 4A and 4B are automatically closed, so that the power generated by each of the diesel generators 6A and 6B is transferred to the emergency high-voltage bus. 3A and 3B.

Thus, the emergency low-voltage buses 9A, 9B,
11A and 11B can receive electric power, and a circuit breaker 12A and an A-system regular charger 14 are connected to the emergency low-voltage bus 11A.
A, an electric circuit composed of circuit breaker 18A, an electric circuit composed of circuit breaker 13A, preliminary charger 15, and circuit breaker 19A, or an electric circuit composed of circuit breaker 13B, preliminary charger 15, and circuit breaker 19A , Power can be supplied to the DC power supply panel 20A. Similarly, an electric circuit including the emergency low-voltage bus 11B to the circuit breaker 12B, the B-system service charger 14B, and the circuit breaker 18B, an electric circuit including the circuit breaker 13B, the preliminary charger 15, and the circuit breaker 19B, or a circuit breaker. Power can be supplied to the DC power supply panel 20B via any one of the electric circuits constituted by the power supply panel 13A, the pre-charger 15, and the circuit breaker 19B, and can drive devices connected to the DC power supply panels 20A and 20B. it can. When the external power supply is lost,
A and 2B are automatically shut off.

Further, when the emergency diesel generators 6A and 6B cannot be started due to a failure when the external power is lost, and the emergency power cannot be supplied to the emergency high-voltage buses 3A and 3B (hereinafter, this state is referred to as a loss of all AC power). DC power panel 2
0A and 20B supply DC power from storage batteries 16A and 16B to DC power supply panels 20A and 20B via circuit breakers 17A and 17B, respectively. Thereby, the DC power panels 20A, 20
The device connected to B can be driven. When all the AC power is lost, the circuit breakers 18A and 18B are automatically shut off.

[0012]

By the way, when all the AC power is lost, the breakers 17A and 16B break down due to a failure.
If power cannot be supplied to the DC power supply panels 20A and 20B via the terminals A and 17B, the DC power supply panels 20A and 20B cause a power failure, and the power supply to the devices connected to the DC power supply panels 20A and 20B stops. Resulting in.

It is desirable that the nuclear power plant be configured to ensure safety, and it is necessary to take measures against events that occur with a low probability in terms of safety measures. However, due to the emergence of several times during the life of the reactor,
Backing up the storage batteries 16A and 16B for supplying emergency DC power to the DC power panel 20 has a significant effect on space and cost.

Therefore, as a countermeasure, it is conceivable to install a communication line from the regular high-voltage bus of the adjacent nuclear power plant to the emergency power supply equipment of the nuclear power plant. However, although it is possible in principle to supply power to the DC power panel 20 of the other nuclear power plant using this communication line, there are the following problems.

Various types of circuit breakers have various interlock conditions determined during normal operation and for other cases, and it is necessary to rearrange these conditions to determine new interlock conditions. In addition, the loss of all AC power and the failure of the storage battery described above are assumed to occur when a large earthquake or the like occurs.When such a situation occurs, emergency power must be supplied through the service high-voltage bus. Does not make much sense in safety measures. That is, if the building that houses these service high-voltage buses is not a reactor building, the structure of the building is relatively compared to a reactor building that has been subjected to many times the standard building standards as safety equipment such as seismic design. Because it is weak.

An object of the present invention is to provide power supply from one of two or more adjacent nuclear power plants even if one of the two or more nuclear power plants loses all AC power and a battery fails. It is possible to provide emergency power equipment for nuclear power plants.

[0017]

According to a first aspect of the present invention, there is provided an emergency power supply system for a nuclear power plant, comprising: an emergency low voltage bus receiving power supply from an emergency high voltage bus in the nuclear power plant; A regular charger that charges AC power and converts it to DC power, a spare charger that is provided as a backup for the charger and charges AC power from the emergency low-voltage bus and converts it to DC power, a charger and a preliminary charger Power supply panel to receive DC power from the power supply and power supply when supplying power from the emergency low-voltage bus of one of two or more adjacent nuclear power plants to the spare charger of the other nuclear power plant And a circuit breaker.

In the emergency power supply system for a nuclear power plant according to the first aspect of the present invention, when power is supplied from one nuclear power plant to the DC power panel of the other failed nuclear power plant, a circuit breaker is turned on. Power is supplied from the emergency low-voltage bus of one of the nuclear power plants via its circuit breaker to the pre-charger of the other nuclear power plant. Thereby, power is supplied to the DC power supply panel via the pre-charger.

According to a second aspect of the present invention, there is provided an emergency power supply system for a nuclear power plant, which charges an emergency low-voltage bus receiving power supply from an emergency high-voltage bus and an AC power supply from the emergency low-voltage bus. A charger for converting to a DC power supply, a pre-charger provided as a backup for the charger, charging an AC power supply from the emergency low-voltage bus, and converting the power supply to a DC power supply, and receiving DC power supply from the charger and the preliminary charger. It comprises a DC power supply panel and a communication circuit for supplying power from the emergency low-voltage bus of one of the two or more adjacent nuclear power plants to the spare charger of the other nuclear power plant.

In the emergency power supply equipment for a nuclear power plant according to the second aspect of the present invention, when power is supplied from one nuclear power plant to the DC power panel of the other failed nuclear power plant, the power supply of one nuclear power plant is Power is supplied from the emergency low-voltage bus to the reserve charger of the other nuclear power plant via the communication line. Thereby, power is supplied to the DC power supply panel via the pre-charger.

According to the third aspect of the present invention, the emergency power supply system for a nuclear power plant charges an emergency low-voltage bus that receives power supply from an emergency high-voltage bus in the nuclear power plant and an AC power supply from the emergency low-voltage bus. A charger for converting to a DC power supply, a pre-charger provided as a backup for the charger, charging an AC power supply from the emergency low-voltage bus, and converting the power supply to a DC power supply, and receiving DC power supply from the charger and the preliminary charger. A DC power supply panel, and a circuit breaker that is turned on when power is supplied from the emergency low-voltage bus of one of the two or more adjacent nuclear power plants to the service charger of the other nuclear power plant It is a thing.

In the emergency power supply system for a nuclear power plant according to the third aspect of the present invention, when power is supplied from one nuclear power plant to the DC power panel of the other failed nuclear power plant, a circuit breaker is turned on. Power is supplied from the emergency low-voltage bus of one nuclear power plant to the service charger of the other nuclear power plant via the circuit breaker. Thereby, power is supplied to the DC power supply panel via the regular charger.

According to a fourth aspect of the present invention, an emergency power supply system for a nuclear power plant charges an emergency low-voltage bus receiving power from an emergency high-voltage bus and an AC power supply from the emergency low-voltage bus in the nuclear power plant. A charger for converting to a DC power supply, a pre-charger provided as a backup for the charger, charging an AC power supply from the emergency low-voltage bus, and converting the power supply to a DC power supply, and receiving DC power supply from the charger and the preliminary charger. It comprises a DC power supply panel and a communication circuit for supplying power from the emergency low-voltage bus of one of the two or more adjacent nuclear power plants to the service charger of the other nuclear power plant.

In the emergency power supply system for a nuclear power plant according to the present invention, when power is supplied from one of the nuclear power plants to the DC power supply panel of the other failed nuclear power plant, the emergency power supply equipment of the one of the nuclear power plants is used. Power is supplied from the emergency low-voltage bus to the service charger of the other nuclear power plant via the communication line. Thereby, power is supplied to the DC power supply panel via the regular charger.

An emergency power supply system for a nuclear power plant according to the invention of claim 5 charges an emergency low-voltage bus that receives power supply from the emergency high-voltage bus and an AC power supply from the emergency low-voltage bus in the nuclear power plant. A charger for converting to a DC power supply, a pre-charger provided as a backup for the charger, charging an AC power supply from the emergency low-voltage bus, and converting the power supply to a DC power supply, and receiving DC power supply from the charger and the preliminary charger. The power supply is supplied from the DC power panel and the emergency high-voltage bus or the emergency low-voltage bus of both nuclear power plants of two or more adjacent nuclear power plants to supply power to the spare charger of each nuclear power plant. The power supply includes a low-voltage bus for power supply and a circuit breaker that is turned on when power is supplied from the high-voltage bus for emergency use or the low-voltage bus for emergency use to the low-voltage bus for power supply use.

In the emergency power supply system for a nuclear power plant according to the invention of claim 5, when power is supplied from one of the nuclear power plants to the DC power panel of the other failed nuclear power plant, a circuit breaker is turned on. Power is supplied from both emergency high voltage or emergency low voltage buses to the power interchange low voltage bus. Then, power is supplied to each DC power panel by supplying power from the low-voltage bus for power supply to the spare charger of each nuclear power plant.

The emergency power supply equipment for a nuclear power plant according to the invention of claim 6 charges an emergency low-voltage bus receiving power supply from the emergency high-voltage bus and a AC power supply from the emergency low-voltage bus in the nuclear power plant. A charger for converting to a DC power supply, a pre-charger provided as a backup for the charger, charging an AC power supply from the emergency low-voltage bus, and converting the power supply to a DC power supply, and receiving DC power supply from the charger and the preliminary charger. The power supply is supplied from the DC power panel and the emergency high-voltage bus or the emergency low-voltage bus of both nuclear power plants of two or more adjacent nuclear power plants to supply power to the spare charger of each nuclear power plant. It has a low-voltage bus for power supply interchange and a communication line for supplying power from the high-voltage bus for emergency use or the low-voltage bus for emergency use of both nuclear power plants to the low-voltage bus for power supply interchange.

In the emergency power supply system for a nuclear power plant according to the invention of claim 6, when power is supplied from one of the nuclear power plants to the DC power panel of the other failed nuclear power plant, both emergency high-voltage power supplies or Power is supplied from the emergency low-voltage bus to the power interchange low-voltage bus via the communication line. Then, power is supplied to each DC power panel by supplying power from the low-voltage bus for power supply to the spare charger of each nuclear power plant.

The emergency power supply equipment for a nuclear power plant according to the invention of claim 7 is for charging an emergency low voltage bus receiving power supply from an emergency high voltage bus and a AC power supply from the emergency low voltage bus in the nuclear power plant. A charger for converting to a DC power supply, a pre-charger provided as a backup for the charger, charging an AC power supply from the emergency low-voltage bus, and converting the power supply to a DC power supply, and receiving DC power supply from the charger and the preliminary charger. Power is supplied from the DC power panel and the emergency high-voltage bus or the emergency low-voltage bus of both nuclear power plants of two or more adjacent nuclear power plants to supply power to the service charger of each nuclear power plant. The power supply includes a low-voltage bus for power supply and a circuit breaker that is turned on when power is supplied from the high-voltage bus for emergency use or the low-voltage bus for emergency use to the low-voltage bus for power supply use.

In the emergency power supply system for a nuclear power plant according to the invention of claim 7, when power is supplied from one nuclear power plant to the DC power panel of the other failed nuclear power plant, a circuit breaker is turned on. Power is supplied from both emergency high voltage or emergency low voltage buses to the power interchange low voltage bus. Then, power is supplied from the low-voltage bus for power supply to the regular chargers of each nuclear power plant to supply power to each DC power panel.

The emergency power supply system for a nuclear power plant according to the invention of claim 8 is for charging an emergency low-voltage bus receiving power supply from an emergency high-voltage bus and a AC power supply from the emergency low-voltage bus in the nuclear power plant. A charger for converting to a DC power supply, a pre-charger provided as a backup for the charger, charging an AC power supply from the emergency low-voltage bus, and converting the power supply to a DC power supply, and receiving DC power supply from the charger and the preliminary charger. Power is supplied from the DC power panel and the emergency high-voltage bus or the emergency low-voltage bus of both nuclear power plants of two or more adjacent nuclear power plants to supply power to the service charger of each nuclear power plant. It has a low-voltage bus for power supply interchange and a communication line for supplying power from the high-voltage bus for emergency use or the low-voltage bus for emergency use of both nuclear power plants to the low-voltage bus for power supply interchange.

In the emergency power supply system for a nuclear power plant according to the invention of claim 8, when power is supplied from one of the nuclear power plants to the DC power supply panel of the other failed nuclear power plant, both of the emergency high-voltage power supplies or Power is supplied from the emergency low-voltage bus to the power interchange low-voltage bus via the communication line. Then, power is supplied from the low-voltage bus for power supply to the regular chargers of each nuclear power plant to supply power to each DC power panel.

The emergency power supply system for a nuclear power plant according to the ninth aspect of the present invention charges an emergency low-voltage bus that receives power supply from the emergency high-voltage bus and an AC power supply from the emergency low-voltage bus. A charger for converting to a DC power supply, a pre-charger provided as a backup for the charger, charging an AC power supply from the emergency low-voltage bus, and converting the power supply to a DC power supply, and receiving DC power supply from the charger and the preliminary charger. The power is supplied from the emergency high-voltage bus or the emergency low-voltage bus of both the DC power panel and the two or more adjacent nuclear power stations, and power is supplied to the DC power panel of each nuclear power station. It is provided with a common pre-charger and a circuit breaker that is turned on when power is supplied to the common pre-charger from the emergency high-voltage bus or the emergency low-voltage bus of both nuclear power plants.

In the emergency power supply system for a nuclear power plant according to the ninth aspect of the present invention, when power is supplied from one nuclear power plant to the DC power panel of the other failed nuclear power plant, a circuit breaker is turned on. Power is supplied to the common precharger from both emergency high voltage or emergency low voltage buses. And
Power is supplied from the common spare charger to each DC power panel of each nuclear power plant.

The emergency power supply equipment for a nuclear power plant according to the tenth aspect of the present invention charges an emergency low-voltage bus receiving power supply from an emergency high-voltage bus and a AC power supply from the emergency low-voltage bus in the nuclear power plant. A charger for converting to a DC power supply, a pre-charger provided as a backup for the charger, charging an AC power supply from the emergency low-voltage bus, and converting the power supply to a DC power supply, and receiving DC power supply from the charger and the preliminary charger. The power is supplied from the emergency high-voltage bus or the emergency low-voltage bus of both the DC power panel and the two or more adjacent nuclear power stations, and power is supplied to the DC power panel of each nuclear power station. It is provided with a common precharger and a communication circuit for supplying power to the common precharger from the emergency high-voltage bus or the emergency low-voltage bus of both nuclear power plants.

In the emergency power supply system for a nuclear power plant according to the tenth aspect, when power is supplied from one of the nuclear power plants to the DC power panel of the other failed nuclear power plant, both emergency high-voltage power supplies or Power is supplied from the emergency low-voltage bus to the common precharger via the communication line. Then, power is supplied from the common spare charger to each DC power panel of each nuclear power plant.

An emergency power supply system for a nuclear power plant according to the invention of claim 11 is for charging an emergency low-voltage bus receiving power supply from the emergency high-voltage bus and a AC power supply from the emergency low-voltage bus in the nuclear power plant. A charger for converting to a DC power supply, a pre-charger provided as a backup for the charger, charging an AC power supply from the emergency low-voltage bus, and converting the power supply to a DC power supply, and receiving DC power supply from the charger and the preliminary charger. DC power panel and power supply when power is supplied from one emergency high-voltage bus or emergency low-voltage bus of two or more adjacent nuclear power plants to the emergency high-voltage bus or emergency low-voltage bus of the other nuclear power plant And a circuit breaker.

In the emergency power supply system for a nuclear power plant according to the invention of claim 11, when power is supplied from one of the nuclear power plants to the DC power supply panel of the other failed nuclear power plant, a circuit breaker is turned on. Power is supplied from one emergency high-voltage bus or emergency low-voltage bus via the circuit breaker to the emergency high-voltage bus or emergency low-voltage bus of the other nuclear power plant. Then, power is supplied to the DC power panel from the emergency power bus of the other nuclear power plant to which the power has been supplied, via the service charger or the spare charger.

[0039]

Embodiments of the present invention will be described below. FIG. 1 is a configuration diagram of an emergency power supply system of a nuclear power plant according to a first embodiment of the present invention. This first embodiment is different from the conventional example shown in FIG.
In the emergency power supply system of one nuclear power plant, the emergency low-voltage buses 11C and 11D of one nuclear power plant and the spare charger 1 of the other nuclear power plant via circuit breakers 23 and 24
5 so that power can be supplied to each of the DC power supply panels 20A and 20B.

In FIG. 1, the chargers 14, 1 connected to the emergency low-voltage buses 11C, 11D of one of the nuclear power plants are shown.
Although illustration of the DC power supply panel 5 and the DC power supply panel 20 is omitted, emergency power can be supplied to one of the nuclear power plants from the emergency low-voltage buses 11A and 11B of the other nuclear power plant. In other words, although not shown, the power supply can be provided between adjacent nuclear power plants.

In FIG. 1, the same elements as those shown in FIG. 12 are denoted by the same reference numerals, and description thereof will be omitted. Now, when all the AC power is lost at the nuclear power plant, the emergency high-voltage buses 3A and 3B are cut off. For example, when the external power supply is lost, the emergency high-voltage buses 3A and 3B cannot receive power from the service high-voltage bus via the service / emergency high-voltage bus connections 1A and 1B. When the generators 6A and 6B fail to start and become unable to receive power from the emergency diesel generators 6A and 6B, all AC power is lost.
In this case, the emergency high-voltage buses 3A and 3B lose power.

For this reason, the emergency low-voltage buses 9A and 9B connected to the emergency high-voltage buses 3A and 3B also lose power, and the emergency low-voltage buses 11A and 11B connected to the emergency low-voltage buses 9A and 9B also lose power. Becomes Further, the regular charger 14 connected to the emergency low-voltage buses 11A, 11B
A and 14B cannot receive power supply, and in this state, no power is supplied to DC power supply panels 20A and 20B.

In this case, since emergency equipment important for the operation of the nuclear power plant is connected to the DC power supply panels 20A and 20B, power is always supplied to operate these equipment in any state. There is a need. Therefore, in preparation for the loss of all AC power, the storage batteries 16A, 1
6B is provided in the nuclear power plant, and the DC power supply panel 20B is provided.
Circuit breakers 17A, 17B to prevent power outages of A, 20B
B from the storage batteries 16A, 16B
A and 20B are supplied with power.

When all AC power is lost, the storage battery 1
6A and 16B supply power to the DC power supply panels 20A and 20B to perform a safe stop operation of the nuclear power plant. In addition, when a failure occurs in the storage batteries 16A and 16B, the circuit breakers 17A and 17B are left as they are. Power cannot be supplied from the storage batteries 16a, 16b to the DC power supply panels 20A, 20B via the storage batteries 16a, 16b, and the power is supplied by turning on the circuit breakers 23, 24 from the power supply system in the adjacent nuclear power plant. The power station can be safely stopped.

That is, when the power supply system in the adjacent nuclear power plant is sound, all the AC power is lost from the emergency low-voltage bus 11C or the emergency low-voltage bus 11D and the nuclear power generation in which the storage battery 16 has failed. The power is supplied to the pre-charger 15 of the emergency power supply equipment at the place. for that reason,
One of the circuit breakers 23 and 24 is turned on, and power is supplied through the communication line 21 between the emergency low-voltage bus 11C and the preliminary charger 15 or the communication line 22 between the emergency low-voltage bus 11D and the preliminary charger 15. . Next, in order to supply power from the pre-charger 15 to the DC power supply panels 20A, 20B, the circuit breakers 19A, 1
9B, the DC power supply panels 20A, 20B
Power outage can be prevented.

By performing the above operation, power can be supplied to the DC power supply panels 20A and 20B, and the DC power supply for safely stopping the nuclear power plant even if all the AC power is lost and the storage battery 16 fails. Equipment can be driven.

Next, a second embodiment of the present invention will be described. FIG. 2 is a configuration diagram of an emergency power supply facility of a nuclear power plant according to a second embodiment of the present invention. This second embodiment is different from the first embodiment shown in FIG. 1 in that communication lines 21 and 22 between the emergency low-voltage buses 11C and 11D of each nuclear power plant and the precharger 15 are provided. Circuit breakers 23 and 24 for switching between closing and opening are eliminated. This makes it possible to rationalize the equipment and to reliably supply necessary electric power to the electric equipment connected to the DC power supply panel 20 even when all the AC power is lost and the storage battery 16 fails. It is.

In FIG. 2, the chargers 14, 1 connected to the emergency low-voltage buses 11C, 11D of one of the nuclear power plants are shown.
Although illustration of the DC power supply panel 5 and the DC power supply panel 20 is omitted, emergency power can be supplied to one of the nuclear power plants from the emergency low-voltage buses 11A and 11B of the other nuclear power plant. In other words, although not shown, the power supply can be provided between adjacent nuclear power plants.

In FIG. 2, when all the AC power is lost, the safe stop operation of the nuclear power plant is performed by supplying power from the storage batteries 16A and 16B to the DC power panels 20A and 20B. In addition, when a failure occurs in the storage batteries 16A and 16B, the connection power supply line 2
Power is supplied through the first and second terminals 22.

That is, when the power supply system in the adjacent nuclear power plant is sound, all the AC power is lost from the emergency low-voltage bus 11C or the emergency low-voltage bus 11D, and the batteries 16A and 16B fail. Power is supplied to the spare charger 15 of the other nuclear power plant. That is, the communication line 21 between the emergency low-voltage bus 11C and the preliminary charger 15 or the communication line 2 between the emergency low-voltage bus 11D and the preliminary charger 15
Power is supplied to the pre-charger 15 via the power supply 2. And the circuit breakers 19A and 19 of the emergency power supply equipment of the other nuclear power plant
B, power is supplied from the pre-charger 15 to the DC power panels 20A and 20B, and the DC power panels 20A and 20B are supplied.
0B power failure is prevented.

By performing the above operations, power can be supplied to the DC power supply panels 20A and 20B, and DC electric equipment for safely stopping the nuclear power plant even if all AC power is lost and the storage battery 16 fails. Can be driven.

Next, a third embodiment of the present invention will be described. FIG. 3 is a configuration diagram of an emergency power supply facility of a nuclear power plant according to a third embodiment of the present invention. This third embodiment is different from the first embodiment shown in FIG. 1 in that an emergency power supply is supplied to service chargers 14A and 14B instead of the preliminary charger 15. is there.

In FIG. 3, the chargers 14, 1 connected to the emergency low-voltage buses 11C, 11D of one of the nuclear power plants are shown.
Although illustration of the DC power supply panel 5 and the DC power supply panel 20 is omitted, emergency power can be supplied to one of the nuclear power plants from the emergency low-voltage buses 11A and 11B of the other nuclear power plant. In other words, although not shown, the power supply can be provided between adjacent nuclear power plants.

In FIG. 3, when all the AC power is lost, the safety stop operation of the nuclear power plant is performed by supplying power from the storage batteries 16A and 16B to the DC power panels 20A and 20B. In addition, when a failure occurs in the storage batteries 16A and 16B, the circuit breaker 2 is connected to the in-house power supply system of the adjacent nuclear power plant.
3 and 24 are turned on, and power is supplied via the communication lines 21 and 22.

That is, when the power supply system in the adjacent nuclear power plant is sound, all the AC power is lost from the emergency low-voltage bus 11C or the emergency low-voltage bus 11D and the batteries 16A and 16B fail. Power is supplied to the regular chargers 14A and 14B of the other nuclear power plant.

That is, the circuit breaker 23 is turned on to make use of the communication line 21 between the emergency low-voltage bus 11C and the regular charger 14B, or the circuit breaker 24 is turned on to turn on the emergency low-voltage bus 11D.
Power is supplied to the service chargers 14A and 14B by utilizing the communication line 22 of the service charger 14A and the service charger 14A. Then, by turning on the circuit breakers 18A and 18B of the emergency power supply equipment of the other nuclear power plant, power is supplied from the service chargers 14A and 14B to the DC power supply panels 20A and 20B, and the DC power supply panels 20A and 20B are turned on.
Prevent 20B power outage.

By performing the above operation, power can be supplied to the DC power supply panels 20A and 20B, and the DC power supply for safely stopping the nuclear power plant even if all the AC power is lost and the storage batteries 16A and 16B fail. Electric equipment can be driven.

Next, a fourth embodiment of the present invention will be described. FIG. 4 is a configuration diagram of emergency power supply equipment of a nuclear power plant according to a fourth embodiment of the present invention. This fourth embodiment is different from the third embodiment shown in FIG. 3 in that a communication line 21 between emergency low-voltage buses 11C and 11D of a nuclear power plant and service chargers 14B and 14A is provided. Circuit breakers 23 and 24 for switching the closing and opening of 22 are omitted. In this way, the equipment can be rationalized, and even if all the AC power is lost and the storage batteries 16B, 16A fail, the necessary power is supplied to the DC power panel 20B,
20A can be reliably supplied.

In FIG. 4, the chargers 14, 1 connected to the emergency low-voltage buses 11C, 11D of one of the nuclear power plants are shown.
Although illustration of the DC power supply panel 5 and the DC power supply panel 20 is omitted, emergency power can be supplied to one of the nuclear power plants from the emergency low-voltage buses 11A and 11B of the other nuclear power plant. In other words, although not shown, the power supply can be provided between adjacent nuclear power plants.

In FIG. 4, when all the AC power is lost, the power supply from the storage batteries 16A and 16B to the DC power panels 20A and 20B performs a safe stop operation of the nuclear power plant. In addition, when a failure occurs in the storage batteries 16A and 16B, the connection power supply line 2
Power is supplied through the first and second terminals 22.

That is, when the in-plant power supply system of the adjacent nuclear power plant is sound, all the AC power is lost from the emergency low-voltage bus 11C or the emergency low-voltage bus 11D, and the storage batteries 16A and 16B fail. Power is supplied to the regular chargers 14A and 14B of the other nuclear power plant.

That is, the communication line 21 between the emergency low-voltage bus 11C and the service charger 14B, or the connection circuit 2 between the emergency low-voltage bus 11D and the service charger 14A by turning on the circuit breaker 24.
Power is supplied to the service chargers 14A and 14B via the power supply 2. And the circuit breaker 1 of the emergency power supply equipment of the other nuclear power plant
8A and 18B, the regular charger 14
A and 14B supply power to the DC power panels 20A and 20B to prevent power failure of the DC power panels 20A and 20B.

By performing the above operations, power can be supplied to the DC power supply panels 20A and 20B, and the DC power supply for safely stopping the nuclear power plant even if all the AC power is lost and the storage batteries 16A and 16B fail. Electric equipment can be driven.

Next, a fifth embodiment of the present invention will be described. FIG. 5 is a configuration diagram of an emergency power supply facility of a nuclear power plant according to a fifth embodiment of the present invention. The fifth embodiment is different from the first embodiment shown in FIG. 1 in that the emergency low-voltage buses 11A, 11B, 11
C, 11D to circuit breakers 26A, 26B, 26C, 26D
A low-voltage bus 28 for power supply connected via a power supply is provided, and a communication line 27 is provided from the low-voltage bus 28 for power supply connection to the precharger 15 installed in each nuclear power plant. Thus, even if one of the nuclear power plants loses all AC power and the storage batteries 16A and 16B fail, the DC power panels 20A and
0B can be supplied with power.

In FIG. 5, the chargers 14, 1 connected to the emergency low-voltage buses 11C, 11D of one of the nuclear power plants are shown.
Although the illustration of the DC power supply panel 5 and the DC power supply panel 20 is omitted, the emergency power supply can be supplied to the chargers 14 and 15 and the DC power supply panel 20 (not shown) from the power supply low-voltage bus 28.

In FIG. 5, when all the AC power is lost, the safe stop operation of the nuclear power plant is performed by supplying power from the storage batteries 16A and 16B to the DC power panels 20A and 20B. In addition, when a failure occurs in the storage batteries 16A and 16B, power is supplied from the power supply low-voltage bus 28 via the communication line 27.

Since the power supply low-voltage bus 28 is supplied with power from both of the adjacent nuclear power plants, even if the emergency power supply of one of the nuclear power plants fails, the other nuclear power plant When the emergency power supply equipment is healthy, power is supplied to the low-voltage bus 28 for power supply interchange.

That is, when any of the adjacent nuclear power plants is healthy, the emergency low-voltage buses 11A, 11A
Power is supplied from any one of B, 11C, and 11D to the low-voltage bus 28 for power supply interchange. Therefore, all the AC power is lost from the low-voltage bus 28 for power supply interchange and the storage batteries 16A, 16A,
Spare charger 1 for nuclear power plant with 6B failure
Supply power to 5.

That is, the emergency circuit breaker 26C or 26D of the emergency power supply facility of the nuclear power plant is turned on,
Power is supplied to the low-voltage bus for power supply interchange 28 via the communication line 25C or 25D. In this state, power is supplied to the pre-charger 15 via the communication line 27 connecting the low-voltage bus 28 for power supply interchange and the pre-charger 15. And
By turning on the circuit breakers 19A and 19B of the emergency power supply equipment of the other failed nuclear power plant, the pre-charger 15
Supplies power to the DC power supply panels 20A and 20B to prevent power failure of the DC power supply panels 20A and 20B.

In the above description, the emergency low-voltage buses 11A, 11B, 11C, 1
Although power is supplied from the 1D to the low-voltage bus for power supply interchange 28, power may be supplied from the emergency high-voltage buses 3A, 3B, 3C, and 3D.

Next, a sixth embodiment of the present invention will be described. FIG. 6 is a configuration diagram of an emergency power supply system of a nuclear power plant according to a sixth embodiment of the present invention. This sixth embodiment differs from the fifth embodiment shown in FIG. 5 in that the emergency low-voltage buses 11A, 11B, 11C,
Communication line 25 between 11D and power supply low-voltage bus 28
Circuit breakers 26A, 26B, 26C, 26D for switching between closing and opening of A, 25B, 25C, 25D are deleted. Thus, the equipment can be rationalized and the necessary power can be supplied to the DC power supply panel 20 even when all AC power is lost and the storage batteries 16A and 16B fail.
A and 20b can be reliably supplied to the electric equipment connected thereto.

In FIG. 6, the chargers 14, 1 connected to the emergency low-voltage buses 11C, 11D of one of the nuclear power plants are shown.
Although the illustration of the DC power supply panel 5 and the DC power supply panel 20 is omitted, the emergency power supply can be supplied to the chargers 14 and 15 and the DC power supply panel 20 (not shown) from the power supply low-voltage bus 28.

In FIG. 6, when all the AC power is lost, the safe stop operation of the nuclear power plant is performed by supplying power from the storage batteries 16A and 16B to the DC power panels 20A and 20B. In addition, when a failure occurs in the storage batteries 16A and 16B, power is supplied from the power supply low-voltage bus 28 via the communication line 27.

Since the power supply low-voltage bus 28 is supplied with power from both of the adjacent nuclear power plants, even if the emergency power supply equipment of one of the nuclear power plants fails, the other nuclear power plant When the emergency power supply equipment is healthy, power is supplied to the low-voltage bus 28 for power supply interchange.

That is, when any of the adjacent nuclear power plants is healthy, the emergency low-voltage buses 11A, 11A
Power is supplied from any one of B, 11C, and 11D to the low-voltage bus 28 for power supply interchange. Therefore, all the AC power is lost from the low-voltage bus 28 for power supply interchange and the storage batteries 16A, 16A,
Spare charger 1 for nuclear power plant with 6B failure
Supply power to 5.

That is, power is supplied to the low-voltage bus 28 for power supply through the communication line 25C or the communication line 25D of the emergency power supply facility of the nuclear power plant that is sound. Therefore,
Power is supplied to the pre-charger 15 via the communication line 27 connecting the low-voltage bus 28 for power supply and the pre-charger 15. Then, by turning on the circuit breakers 19A and 19B of the emergency power supply equipment of the other failed nuclear power plant, power is supplied from the preliminary charger 15 to the DC power supply panels 20A and 20B, and the power failure of the DC power supply panels 20A and 20B is performed. To prevent

In the above description, the emergency low-voltage buses 11A, 11B, 11C, 1
Although power is supplied from the 1D to the low-voltage bus for power supply interchange 28, power may be supplied from the emergency high-voltage buses 3A, 3B, 3C, and 3D.

Next, a seventh embodiment of the present invention will be described. FIG. 7 is a configuration diagram of an emergency power supply facility of a nuclear power plant according to a seventh embodiment of the present invention. The seventh embodiment is different from the fifth embodiment shown in FIG. 5 in that an emergency power supply is supplied to the service chargers 14A and 14B instead of the spare charger 15. is there.

In FIG. 7, the chargers 14, 1 connected to the emergency low-voltage buses 11C, 11D of one of the nuclear power plants are shown.
Although the illustration of the DC power supply panel 5 and the DC power supply panel 20 is omitted, the emergency power supply can be supplied to the chargers 14 and 15 and the DC power supply panel 20 (not shown) from the power supply low-voltage bus 28.

In FIG. 7, when all the AC power is lost, the safe stop operation of the nuclear power plant is performed by supplying power from the storage batteries 16A and 16B to the DC power panels 20A and 20B. In addition, when a failure occurs in the storage batteries 16A and 16B, power is supplied from the power supply low-voltage bus 28 via the communication lines 29 and 30.

Since the power supply low-voltage bus 28 is supplied with power from both of the adjacent nuclear power plants, even if the emergency power supply equipment of one of the nuclear power plants fails, the other nuclear power plant When the emergency power supply equipment is healthy, power is supplied to the low-voltage bus 28 for power supply interchange.

That is, if any of the adjacent nuclear power plants is healthy, the emergency low-voltage buses 11A, 11A
Power is supplied from any one of B, 11C, and 11D to the low-voltage bus 28 for power supply interchange. Therefore, all the AC power is lost from the low-voltage bus 28 for power supply interchange and the storage batteries 16A, 16A,
Service charger 1 for nuclear power plant with 6B failure
Power is supplied to 4A and 14B.

That is, the emergency circuit breaker 26C or 26D of the emergency power supply facility of the nuclear power plant is turned on,
Power is supplied to the low-voltage bus for power supply interchange 28 via the communication line 25C or 25D. In this state, power is supplied to the spare charger 15 via the communication lines 29 and 30 connecting the low-voltage bus 28 for power supply and the regular chargers 14A and 14B. Then, by turning on the circuit breakers 18A and 18B of the emergency power supply equipment of the other failed nuclear power plant, the DC power supply panel 20A,
Power is supplied to the DC power supply panel 20B to prevent a power failure of the DC power supply panels 20A and 20B.

In the above description, the emergency low-voltage buses 11A, 11B, 11C, 1
Although power is supplied from the 1D to the low-voltage bus for power supply interchange 28, power may be supplied from the emergency high-voltage buses 3A, 3B, 3C, and 3D.

Next, an eighth embodiment of the present invention will be described. FIG. 8 is a configuration diagram of an emergency power supply system of a nuclear power plant according to an eighth embodiment of the present invention. This eighth embodiment is different from the seventh embodiment shown in FIG. 7 in that the emergency low-voltage buses 11A, 11B, 11C,
Communication line 25 between 11D and power supply low-voltage bus 28
Circuit breakers 26A, 26B, 26C, 26D for switching between closing and opening of A, 25B, 25C, 25D are deleted. Thus, the equipment can be rationalized and the necessary power can be supplied to the DC power supply panel 20 even when all AC power is lost and the storage batteries 16A and 16B fail.
A and 20b can be reliably supplied to the electric equipment connected thereto.

In FIG. 8, the chargers 14, 1 connected to the emergency low-voltage buses 11C, 11D of one of the nuclear power plants are shown.
Although the illustration of the DC power supply panel 5 and the DC power supply panel 20 is omitted, the emergency power supply can be supplied to the chargers 14 and 15 and the DC power supply panel 20 (not shown) from the power supply low-voltage bus 28.

In FIG. 8, when all the AC power is lost, the safety stop operation of the nuclear power plant is performed by supplying power from the storage batteries 16A and 16B to the DC power panels 20A and 20B. In addition, when a failure occurs in the storage batteries 16A and 16B, power is supplied from the power supply low-voltage bus 28 via the communication lines 29 and 30.

Since the power supply low-voltage bus 28 is supplied with power from both of the adjacent nuclear power plants, even if the emergency power supply of one of the nuclear power plants fails, the other nuclear power plant When the emergency power supply equipment is healthy, power is supplied to the low-voltage bus 28 for power supply interchange.

That is, when any of the adjacent nuclear power plants is healthy, the emergency low-voltage buses 11A, 11A
Power is supplied from any one of B, 11C, and 11D to the low-voltage bus 28 for power supply interchange. Therefore, all the AC power is lost from the low-voltage bus 28 for power supply interchange and the storage batteries 16A, 16A,
Service charger 1 for nuclear power plant with 6B failure
Power is supplied to 4A and 14B.

That is, the power is supplied to the low-voltage bus 28 for power supply through the communication line 25C or 25D of the emergency power supply facility of the nuclear power plant which is sound. Therefore,
The backup charger 15 is connected via the communication lines 29 and 30 connecting the low-voltage bus 28 for power supply and the regular chargers 14A and 14B.
Is supplied with power. Then, by turning on the circuit breakers 18A and 18B of the emergency power supply equipment of the other failed nuclear power plant, power is supplied from the service chargers 14A and 14B to the DC power supply panels 20A and 20B, and the DC power supply panels 20A and 20B are supplied.
Prevent B power outage.

In the above description, the emergency low-voltage buses 11A, 11B, 11C, 1
Although power is supplied from the 1D to the low-voltage bus for power supply interchange 28, power may be supplied from the emergency high-voltage buses 3A, 3B, 3C, and 3D.

Next, a ninth embodiment of the present invention will be described. FIG. 9 is a configuration diagram of an emergency power supply system of a nuclear power plant according to a ninth embodiment of the present invention. The ninth embodiment is different from the fifth embodiment shown in FIG. 5 in that a common preliminary charger 31 is provided instead of the preliminary charger 15 and the low-voltage bus for power supply interchange. This common spare charger 31 includes emergency low-voltage buses 11A, 11 of each nuclear power plant.
Emergency power is supplied from B, 11C and 11D.

In FIG. 9, the chargers 14, 1 connected to the emergency low-voltage buses 11C, 11D of one of the nuclear power plants are shown.
Although the illustration of the DC power supply panel 5 and the DC power supply panel 20 is omitted, the emergency power supply can be supplied from the common preliminary charger 31 to the chargers 14 and 15 and the DC power supply panel 20 not shown.

In FIG. 9, when all the AC power is lost, the nuclear power plant is safely stopped by supplying power from the storage batteries 16A and 16B to the DC power panels 20A and 20B. In addition, when a failure occurs in the storage batteries 16A and 16B, power is supplied from the common preliminary charger 31 via the communication line 27.

[0095] The common spare charger 31 is connected to the circuit breakers 26A, 26B, 26C, 26D from both of the adjacent nuclear power plants.
Also, since power is supplied via the communication lines 25A, 25B, 25C, and 25D, even if the emergency power supply equipment of one of the nuclear power plants breaks down, When the emergency power supply equipment is sound, power is supplied to the common spare charger 31.

That is, when any of the adjacent nuclear power plants is healthy, the emergency low-voltage buses 11A, 11A
B, 11C, or 11D from any one of the shared spare chargers 31
Is supplied with power. Accordingly, the DC power supply panels 20A, 20A, 2B of the nuclear power plant in which all the AC power is lost and the storage batteries 16A, 16B have failed from the common spare charger 31.
Supply power to OB.

That is, power is supplied to the DC power supply panel 31 via the communication power supply line 25C or the communication power supply line 25D of the emergency power supply facility of the nuclear power plant that is sound. Therefore, the circuit breaker 18A of the emergency power supply of the other nuclear power plant that has failed,
By turning on the power supply 18B, power is supplied from the common charger 31 to the DC power supply panels 20A and 20B via the communication line 27, thereby preventing a power failure of the DC power supply panels 20A and 20B.

In the above description, the emergency low-voltage buses 11A, 11B, 11C, 1
Although power is supplied from the 1D to the low-voltage bus for power supply interchange 28, power may be supplied from the emergency high-voltage buses 3A, 3B, 3C, and 3D.

Next, a tenth embodiment of the present invention will be described. FIG. 10 is a configuration diagram of an emergency power supply facility of a nuclear power plant according to a tenth embodiment of the present invention. This first
Embodiment 0 is different from the ninth embodiment shown in FIG. 9 in that the emergency low-pressure buses 11A, 11B,
Circuit breakers 26A, 26B, 26C, 26D for switching between closing and opening of communication lines 25A, 25B, 25C, 25D between 11C, 11D and common preliminary charger 31.
Is deleted. In this way, the equipment can be rationalized and the necessary power can be reliably supplied to the electric devices connected to the DC power supply panels 20A and 20b even when all AC power is lost and the storage batteries 16A and 16B fail. Becomes possible.

In FIG. 10, the charger 14, which is connected to the emergency low-voltage buses 11C and 11D of one of the nuclear power plants,
Although illustration of the DC power supply panel 15 and the DC power supply panel 20 is omitted, the common power supply 31 is configured to supply emergency power to the chargers 14 and 15 and the DC power supply panel 20 (not shown).

In FIG. 10, when all the AC power is lost, the safety stop operation of the nuclear power plant is performed by supplying power from the storage batteries 16A and 16B to the DC power panels 20A and 20B. In addition, when a failure occurs in the storage batteries 16A and 16B, power is supplied from the common preliminary charger 31 via the communication line 27.

[0102] The common standby charger 31 is connected to the communication lines 25A, 25B, 25C, 25 from both of the adjacent nuclear power plants.
Since power is supplied via D, even if the emergency power supply of one nuclear power plant fails, the emergency power supply of the other nuclear power plant is sound Means that power is supplied to the common preliminary charger 31.

That is, when any of the adjacent nuclear power plants is healthy, the emergency low-voltage buses 11A, 11A
B, 11C, or 11D from any one of the shared spare chargers 31
Is supplied with power. Accordingly, the DC power supply panels 20A, 20A, 2B of the nuclear power plant in which all the AC power is lost and the storage batteries 16A, 16B have failed from the common spare charger 31.
Supply power to OB.

That is, power is supplied to the DC power supply panel 31 via the communication line 25C or the communication line 25D of the emergency power supply facility of the nuclear power plant which is sound. Therefore, the circuit breaker 18A of the emergency power supply of the other nuclear power plant that has failed,
By turning on the power supply 18B, power is supplied from the common charger 31 to the DC power supply panels 20A and 20B via the communication line 27, thereby preventing a power failure of the DC power supply panels 20A and 20B.

In the above description, the emergency low-voltage buses 11A, 11B, 11C, 1
Although power is supplied from the 1D to the low-voltage bus for power supply interchange 28, power may be supplied from the emergency high-voltage buses 3A, 3B, 3C, and 3D.

Next, an embodiment of the present invention will be described. FIG. 11 is a configuration diagram of an emergency power supply facility of a nuclear power plant according to an eleventh embodiment of the present invention. This eleventh embodiment is used when power is supplied from one of the emergency low-voltage buses 11C and 11D of two or more adjacent nuclear power plants to the emergency low-voltage buses 11A and 11B of the other nuclear power plant. Circuit breakers 26A, 26B, 26C, 26D.

In FIG. 11, the charger 14, which is connected to the emergency low-voltage buses 11C and 11D of one of the nuclear power plants,
Although illustration of the DC power supply panel 15 and the DC power supply panel 20 is omitted, emergency power can be supplied to the chargers 14 and 15 and the DC power supply panel 20 (not shown) from the emergency low-voltage buses 11A and 11B of the other nuclear power plant. It is configured as follows.

In FIG. 11, when all the AC power is lost, the power supply from the storage batteries 16A and 16B to the DC power panels 20A and 20B performs the safety stop operation of the nuclear power plant. In addition, when the failure of the storage batteries 16A, 16B occurs, the circuit breakers 26C, 26D and the communication lines 32, 33
Power is supplied via.

That is, if any of the adjacent nuclear power plants is healthy, a sound emergency low-voltage bus 11
C, 11D and emergency low-voltage buses 11A, 11 with power supply stopped
Circuit breakers 26C, 2
6D and the corresponding circuit breakers 26A, 26B are turned on. As a result, power is supplied to the emergency low-voltage buses 11A and 11B that are stopped, and the emergency low-voltage buses 11A and 11B are utilized. Thereby, the regular charger 14
A, 14B or DC power supply panel 2
Supply power to 0A and 20B.

That is, power is supplied to the DC power supply panel 31 via the communication line 32 or the connection line 33 of the emergency power supply facility of the nuclear power plant which is sound. Accordingly, the circuit breakers 12A, 12A of the emergency power supply equipment of the other failed nuclear power plant
By supplying B, 13A, and 13B, power is supplied from each of the chargers 14 and 15 to the DC power supply panels 20A and 20B, and power failure of the DC power supply panels 20A and 20B is prevented.

In the above description, the emergency low-voltage buses 11A and 11B and the emergency low-voltage buses 11C and 11D of the emergency power supply equipment of each nuclear power plant are connected to circuit breakers 26A, 26B and 26.
C, 26D, but the emergency high-voltage bus 3
A, 3B and the emergency high-voltage buses 3C, 3D
A, 26B, 26C, and 26D may be used for connection.

[0112]

As described above, according to the present invention, emergency power can be supplied to the DC power panel even when external power is lost or the storage battery is broken.
Therefore, the safety of the nuclear power plant is further improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an emergency power supply facility of a nuclear power plant according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of emergency power supply equipment of a nuclear power plant according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of emergency power supply equipment of a nuclear power plant according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram of an emergency power supply facility of a nuclear power plant according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of an emergency power supply system of a nuclear power plant according to a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram of an emergency power supply facility of a nuclear power plant according to a sixth embodiment of the present invention.

FIG. 7 is a configuration diagram of an emergency power supply system of a nuclear power plant according to a seventh embodiment of the present invention.

FIG. 8 is a configuration diagram of emergency power supply equipment of a nuclear power plant according to an eighth embodiment of the present invention.

FIG. 9 is a configuration diagram of an emergency power supply facility of a nuclear power plant according to a ninth embodiment of the present invention.

FIG. 10 is a configuration diagram of emergency power supply equipment of a nuclear power plant according to a tenth embodiment of the present invention.

FIG. 11 is a configuration diagram of an emergency power supply system of a nuclear power plant according to an eleventh embodiment of the present invention.

FIG. 12 is a single-line diagram of a conventional power supply in a nuclear power plant.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Normal / emergency high-voltage bus communication 2, 4, 5 Circuit breaker 3 Emergency high-voltage bus 6 Emergency diesel generator 7 Power transformer 8, 10 Circuit breaker 9, 11 Emergency low-voltage bus 12, 13 Circuit breaker 14 Regular charge Unit 15 Pre-charger 16 Storage battery 17, 18, 19 Circuit breaker 20 DC power panel 21, 22 Communication circuit 23, 24, 26 Circuit breaker 25, 27 Communication circuit 28 Low-voltage bus for power supply interchange 29, 30 Communication circuit 31 Shared pre-charging Container 32, 33 Communication line

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Masami Yoshizumi 8 Shinsugitacho, Isogo-ku, Yokohama-shi, Kanagawa Inside the Toshiba Yokohama Office

Claims (11)

[Claims] 1. An emergency low-voltage bus receiving power supply from an emergency high-voltage bus in a nuclear power plant; a regular charger for charging an AC power supply from the emergency low-voltage bus and converting the AC power into a DC power supply; A nuclear power plant comprising: a spare charger provided as a spare for charging an AC power supply from the emergency low-voltage bus and converting the AC power supply to a DC power supply; and a DC power supply panel for receiving the DC power supply from the charger and the preliminary charger. Breaker that is turned on when power is supplied from the emergency low-voltage bus of one of two or more adjacent nuclear power plants to the standby charger of the other nuclear power plant Emergency power supply equipment for nuclear power plants characterized by the provision of: 2. An emergency low-voltage bus receiving power supply from an emergency high-voltage bus in a nuclear power plant, a charger for charging an AC power supply from the emergency low-voltage bus and converting it into a DC power supply, and a spare for the charger. A nuclear power plant comprising: a pre-charger for charging an AC power supply from the emergency low-voltage bus and converting the power supply to a DC power supply; and a DC power supply panel for receiving the DC power supply from the charger and the pre-charger. The emergency power supply system of (1), characterized in that a communication line for supplying power from the emergency low-voltage bus of one of the two or more adjacent nuclear power plants to the spare charger of the other nuclear power plant is provided. Emergency power supply equipment for nuclear power plants. 3. An emergency low-voltage bus receiving power supply from an emergency high-voltage bus in a nuclear power plant; a charger for charging an AC power supply from the emergency low-voltage bus to convert it to a DC power supply; A nuclear power plant comprising: a pre-charger for charging an AC power supply from the emergency low-voltage bus and converting the power supply to a DC power supply; and a DC power supply panel for receiving the DC power supply from the charger and the pre-charger. In the emergency power supply equipment of (1), a circuit breaker that is turned on when power is supplied from the emergency low-voltage bus of one of the two or more adjacent nuclear power plants to the service charger of the other nuclear power plant Emergency power supply equipment for nuclear power plants, which is provided. 4. An emergency low-voltage bus receiving power supply from an emergency high-voltage bus in a nuclear power plant, a charger for charging an AC power supply from the emergency low-voltage bus and converting the AC power into a DC power supply, and a spare for the charger. A nuclear power plant comprising: a pre-charger for charging an AC power supply from the emergency low-voltage bus and converting the power supply to a DC power supply; and a DC power supply panel for receiving the DC power supply from the charger and the pre-charger. The emergency power supply equipment, characterized in that a communication line is provided for supplying power from the emergency low-voltage bus of one of the two or more adjacent nuclear power plants to the service charger of the other nuclear power plant. Emergency power supply equipment for nuclear power plants. 5. An emergency low-voltage bus receiving power supply from an emergency high-voltage bus in a nuclear power plant, a charger for charging an AC power supply from the emergency low-voltage bus and converting the AC power into a DC power supply, and a spare for the charger. A nuclear power plant comprising: a pre-charger for charging an AC power supply from the emergency low-voltage bus and converting the power supply to a DC power supply; and a DC power supply panel for receiving the DC power supply from the charger and the pre-charger. Power supply is supplied from the emergency high-voltage bus or emergency low-voltage bus of both nuclear power plants of two or more adjacent nuclear power plants and supplies power to the standby charger of each nuclear power plant And a circuit breaker that is turned on when power is supplied from the emergency high-voltage bus or the emergency low-voltage bus of both nuclear power plants to the power-interchange low-voltage bus. Emergency power supply equipment for nuclear power plants. 6. An emergency low-voltage bus receiving power supply from an emergency high-voltage bus in a nuclear power plant, a charger for charging an AC power supply from the emergency low-voltage bus and converting the AC power into a DC power supply, and a spare for the charger. A nuclear power plant comprising: a pre-charger for charging an AC power supply from the emergency low-voltage bus and converting the power supply to a DC power supply; and a DC power supply panel for receiving the DC power supply from the charger and the pre-charger. Power supply is supplied from the emergency high-voltage bus or emergency low-voltage bus of both nuclear power plants of two or more adjacent nuclear power plants and supplies power to the standby charger of each nuclear power plant A low-voltage bus for power supply and a communication line for supplying power to the low-voltage bus for power supply from an emergency high-voltage bus or an emergency low-voltage bus of both nuclear power plants. Emergency power equipment at a nuclear power plant. 7. An emergency low-voltage bus receiving power supply from an emergency high-voltage bus in a nuclear power plant, a charger for charging an AC power from the emergency low-voltage bus and converting the AC power into a DC power, and a spare for the charger. A nuclear power plant comprising: a pre-charger for charging an AC power supply from the emergency low-voltage bus and converting the power supply to a DC power supply; and a DC power supply panel for receiving the DC power supply from the charger and the pre-charger. Emergency power supply equipment, power is supplied from the emergency high-voltage bus or emergency low-voltage bus of both nuclear power plants of two or more adjacent nuclear power plants, and power is supplied to the service charger of each nuclear power plant And a circuit breaker that is turned on when power is supplied from the emergency high-voltage bus or the emergency low-voltage bus of both nuclear power plants to the power-interchange low-voltage bus. Emergency power supply equipment for nuclear power plants. 8. An emergency low-voltage bus receiving power supply from an emergency high-voltage bus in a nuclear power plant, a charger for charging an AC power supply from the emergency low-voltage bus and converting the AC power into a DC power supply, and a spare for the charger. A nuclear power plant comprising: a pre-charger for charging an AC power supply from the emergency low-voltage bus and converting the power supply to a DC power supply; and a DC power supply panel for receiving the DC power supply from the charger and the pre-charger. Emergency power supply equipment, power is supplied from the emergency high-voltage bus or emergency low-voltage bus of both nuclear power plants of two or more adjacent nuclear power plants, and power is supplied to the service charger of each nuclear power plant A low-voltage bus for power supply and a communication line for supplying power to the low-voltage bus for power supply from an emergency high-voltage bus or an emergency low-voltage bus of both nuclear power plants. Emergency power equipment at a nuclear power plant. 9. An emergency low-voltage bus receiving power supply from an emergency high-voltage bus in a nuclear power plant, a charger for charging an AC power supply from the emergency low-voltage bus and converting the AC power into a DC power supply, and a spare for the charger. A nuclear power plant comprising: a pre-charger for charging an AC power supply from the emergency low-voltage bus and converting the power supply to a DC power supply; and a DC power supply panel for receiving the DC power supply from the charger and the pre-charger. Power supply is supplied from the emergency high-voltage bus or the emergency low-voltage bus of both nuclear power plants of two or more adjacent nuclear power plants and supplies power to the DC power panel of each nuclear power plant And a circuit breaker that is turned on when power is supplied to the common spare charger from the emergency high-voltage bus or the emergency low-voltage bus of both nuclear power plants. Emergency power supply equipment for nuclear power plants. 10. An emergency low-voltage bus receiving power supply from an emergency high-voltage bus in a nuclear power plant, a charger for charging an AC power supply from the emergency low-voltage bus and converting the AC power into a DC power supply, and a spare for the charger. A nuclear power plant comprising: a pre-charger for charging an AC power supply from the emergency low-voltage bus and converting the power supply to a DC power supply; and a DC power supply panel for receiving the DC power supply from the charger and the pre-charger. Power supply is supplied from the emergency high-voltage bus or the emergency low-voltage bus of both nuclear power plants of two or more adjacent nuclear power plants and supplies power to the DC power panel of each nuclear power plant And a communication line for supplying power from the emergency high-voltage bus or the emergency low-voltage bus of both nuclear power plants to the common standby charger. Emergency power supply for child power plant. 11. An emergency low-voltage bus that receives power supply from an emergency high-voltage bus in a nuclear power plant, a charger that charges AC power from the emergency low-voltage bus and converts the AC power into a DC power, and a spare for the charger. A nuclear power plant comprising: a pre-charger for charging an AC power supply from the emergency low-voltage bus and converting the power supply to a DC power supply; and a DC power supply panel for receiving the DC power supply from the charger and the pre-charger. When power is supplied from one emergency high-voltage bus or emergency low-voltage bus of two or more adjacent nuclear power plants to the emergency high-voltage bus or emergency low-voltage bus of the other nuclear power plant Emergency power supply equipment for nuclear power plants, characterized in that a circuit breaker is provided for the nuclear power plant.