JP2002267784A - Water injection flow rate adjusting facility for nuclear reactor water injection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a flow rate adjustment by pump or turbine such as mechanical control with an optionally fixed flow rate. SOLUTION: A sealing water pump 3, a system flowmeter 10, a water injection flowmeter 12, and an injection valve 6 are mounted on a water filling pipe 5 for connecting a reactor pressure vessel 7 to a condensate storage tank 1 and a suppression pool 2. A condensate storage tank return pipe 17 is branch- connected to the water filling pipe 5 between the water injection flowmeter 12 and the system flowmeter 10, and a return flowmeter 11 and a flow regulating valve 15 are mounted on the return pipe 17. Accordingly to such a structure, the difference of the system flow rate is returned to the reactor pressure vessel 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turbine-driven water injection flow control system for a reactor water injection system that distributes and injects cooling water to a water source such as a reactor pressure vessel and a condensate storage tank or a suppression pool.

[0002]

2. Description of the Related Art Generally, a boiling water nuclear power plant is provided with a turbine driven reactor water injection system capable of adjusting a water level by injecting cooling water into a reactor pressure vessel when the reactor is isolated. Referring to FIGS. 6A and 6B, first and second examples of a conventional water injection flow rate adjusting device for a turbine driven reactor water injection system will be described.

In a first example shown in FIG. 6A, a turbine-driven reactor water injection system includes a condensate storage tank 1 serving as a first water source for storing condensed water and a suppression pool water. Suppression pool 2 to be the second water source
And an injection pump 3 for injecting condensate or suppression pool water as cooling water into the reactor pressure vessel 7 in an emergency.

A steam supply pipe 9 having a steam control valve 8 for supplying steam generated in the reactor pressure vessel 7, and a water injection pump 3 connected to the steam supply pipe 9 and utilizing steam.
Is driven by a rotary shaft 26. Further, a flow rate calculator 20 for controlling the number of revolutions of the pump driving turbine 4 is provided on the steam control valve 8 via a signal line 27.

[0005] Condensate storage tank 1 and suppression pool 2
Of the reactor pressure vessel 7 by driving the water injection pump 3 from the water source
A water injection pipe 5 having an injection valve 6 and a system flow meter 10 for transferring cooling water to the cooling water supply port is connected.

[0006] A recirculation pipe 22 having a recirculation valve 21 returning to the suppression pool 2 is provided, which is branched from the water injection pipe 5 provided between the injection valve 6 and the system flowmeter 10. In the second example shown in FIG. 6B, the recirculation pipe 22 is provided so as to return to the condensate storage tank 1 instead of the suppression pool 2.

Further, a turbine exhaust pipe 24 for connecting the pump driving turbine 4 to the suppression pool 2 and a communication pipe 25 for communicating the lower part of the condensate storage tank 1 with the water injection pipe 5 are provided. The system flow meter 10 and the flow rate calculator 20 are electrically connected by a signal line 28.

Here, the cooling water injected into the reactor pressure vessel 7 utilizes the condensed water in the condensate storage tank 1 as a first cooling water source and the suppression pool water of the suppression pool 2 as a second cooling water source. ing. The injection valve 6 is opened, and the cooling water is injected from the condensate storage tank 1 or the suppression pool 2 to the reactor pressure vessel 7 through the injection pipe 5 by the operation of the injection pump 3.

The water injection flow rate is determined by the flow rate of the system flow meter 10 provided in the water injection pipe 5, the pressure in the reactor pressure vessel 7,
By controlling the steam control valve 8 provided in the steam supply pipe 9 by the signal processed by the flow rate calculator 20 from the specified flow rate input value, and controlling the rotation speed of the pump driving turbine 4, the flow rate is controlled to a constant flow rate. Is done. The flow value itself can be set in the flow calculator 20 and the flow is adjusted accordingly.

Further, the cooling water is returned from the condensate storage tank 1 or the suppression pool 2 to the suppression pool 2 shown in FIG. 6A by the water injection pump 3 from the recirculation pipe 22 branched and connected to the water injection pipe 5. Without cooling water being injected into the reactor pressure vessel 7 during normal operation of the reactor,
The system integrity of the turbine driven reactor water injection system can be confirmed.

By using the steam in the reactor pressure vessel 7 as a power source, the pump driving turbine 4 is driven, and the turbine 4 drives the water injection pump 3 to operate the reactor pressure vessel 7.
For example, Japanese Patent Laid-Open No. 9-113669 discloses a reactor water injection system for injecting water into the reactor.
No. 6,086,045.

In this publication, a water injection pump for injecting water into a reactor pressure vessel and a steam turbine for driving the water injection pump are provided, and the steam turbine is formed so as to also drive a generator. Equipment is disclosed,
The steam turbine and the generator are connected via a speed converter, and the speed converter is controlled so that the rotation speed of the generator is constant regardless of a change in the speed of the steam turbine.

The flow rate of injection from the injection pump to the reactor pressure vessel can be freely controlled without being influenced by peripheral equipment, and the output frequency of the generator is constant and stable regardless of the control of the flow rate of water injection. Power supply is possible.

The test line of the reactor water injection equipment according to the above publication is a conventional nuclear power plant (BWR-4, 5).
This is a general test line constructed for the purpose of checking pump water injection during plant operation.

[0015]

By the way, the facilities of the conventional water injection pump 3 and the pump driving turbine 4 are complicated in peripheral equipment and large in equipment. For this reason, it is desired to introduce a further simplified reactor water injection system pump and turbine equipment.

In a simplified reactor water injection pump and turbine equipment, the system flow rate, steam pressure,
A system for monitoring system pressure and mechanically adjusting a steam control valve based on the balance to adjust the flow rate to a predetermined flow rate is also included.

However, in the simplified reactor water injection pump and turbine equipment, the flow rate cannot be set to a predetermined flow rate, and the flow rate can be adjusted by freely changing the designation of the flow rate in the conventional equipment. Is not attached. Therefore, in the simplified reactor water injection system pump and turbine equipment, there is a problem that the adjustment of the reactor pressure vessel water level by adjusting the flow rate of the operator is inferior to the conventional equipment.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a water injection flow rate of a reactor water injection system capable of easily adjusting a flow rate in a pump or a turbine for mechanical control in which a system is simplified and a flow rate is arbitrarily fixed. It is to provide an adjustment facility.

[0019]

According to the first aspect of the present invention,
A reactor pressure vessel, a steam supply pipe connected to the reactor pressure vessel, a pump drive turbine connected to the steam supply pipe via a steam control valve, and a turbine on the exhaust side of the pump drive turbine. A suppression pool connected via an exhaust pipe, a water injection pipe connected between the suppression pool and the reactor pressure vessel,
A water injection pump attached to the water injection pipe and driven by the pump driving turbine, and a system flow meter, a water injection flow meter, and a water flow meter sequentially attached to the water injection pipe from the discharge side of the water injection pump toward the reactor pressure vessel. Injection valve, a water source return pipe branched and connected to the water injection pipe provided between the system flow meter and the water injection flow meter, a return flow meter and a flow control valve attached to the water source return pipe, And a water source comprising a condensate storage tank connected to the downstream side of the water source return pipe and / or the suppression pool or both.

According to the invention of claim 1, cooling water is injected by the injection pump through the injection pipe and the return pipe,
The water injection flow rate is adjusted by adjusting the return flow rate at the flow control valve on the return pipe, and the simplified reactor water injection pump and turbine equipment has a flow adjustment function equivalent to that of the conventional equipment.

According to a second aspect of the present invention, there is provided the system flow meter,
At least two of the water injection flow meter and the return flow meter are connected to a flow calculator.
Further, according to this configuration, the injection flow rate is easily adjusted without adjusting the flow rate of the injection pipe on the turbine system side, particularly at the start of the reactor or when the reactor is stopped, where the injection flow rate is likely to change greatly. be able to.

According to the invention of claim 2, the system flow rate,
A turbine-driven reactor water injection system that monitors the reactor pressure vessel injection flow rate and water source return flow rate while adjusting the flow rate of water source cooling water to the reactor pressure vessel and injecting water, enabling operator system batch monitoring. Water injection flow control equipment can be provided.

According to a third aspect of the present invention, there is provided an automatic adjusting device for automatically adjusting a return flow from the water injection pump to the water source. According to the invention according to claim 3, since the flow rate of the cooling water of the water source can be adjusted and injected into the reactor pressure vessel, the flow rate specified by the operator can be automatically adjusted, and the flow rate adjustment by the operator can be reduced. .

According to a fourth aspect of the present invention, in the first aspect of the invention, the flow regulating valve is an electric valve, a pneumatic valve,
It is characterized by comprising a valve for adjusting a flow rate by combining an orifice or an automatic flow control valve.

According to the fourth aspect of the present invention, since the load can be distributed to the flow control valve, the pressure can be distributed to the high pressure turbine driven reactor water injection system, and the valve design conditions can be reduced. It can be advantageous.

The invention according to claim 5 is characterized in that the rotation system of the water injection pump and the steam control valve are electrically connected. According to the invention according to claim 5, the steam flow rate flowing from the reactor pressure vessel to the pump driving turbine through the steam supply pipe is adjusted by the steam control valve, and the reactor pressure is adjusted by adjusting the rotation speed of the water injection pump. The flow rate of water injection into the container can be adjusted.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1 (a), an example of a system configuration in a water injection flow control facility of a reactor water injection system according to a first embodiment will be described. In FIG. 1A, FIG.
The same parts as those described above are denoted by the same reference numerals and described. That is,
A condensate storage tank 1 as a first water source for storing condensed water injected into the reactor pressure vessel 7 and a suppression pool 2 as a second water source for storing suppression pool water are provided. . Further, a water injection pump 3 for injecting condensed water or suppression pool water as cooling water into the reactor pressure vessel 7 is provided.

A pump driving turbine 4 for driving the water injection pump 3 with steam generated from the reactor pressure vessel 7,
An injection valve 6 that connects the water injection pump 3 to the reactor pressure vessel 7 and transfers cooling water, and a water injection pipe 5 provided with a system flow meter 10 are provided.

A condensate storage branching from a water injection pipe 5 between the injection valve 6 and the system flow meter 10 and having a flow regulating valve 15 and a return flow meter 11 for returning a part of the cooling water to the condensate storage tank 1 Tank return piping
17 are connected and configured. The water injection pump 3 and the steam control valve 8 are electrically connected by a signal line 32. The return pipe 17 of the condensate storage tank can perform the same function by installing the flow meter 11 in the conventional recirculation pipe 22.

Next, the operation of the water injection flow rate adjusting equipment of the turbine driven reactor water injection system according to the present embodiment will be described. In FIG. 1A, the condensed water can be transferred from the condensed water storage tank 1 to the water injection pipe 5 by the water injection pump 3 and injected into the reactor pressure vessel 7. Here, the flow rate of water injected into the reactor pressure vessel 7 is adjusted by returning the flow rate control valve 15 on the return pipe 17 of the condensate storage tank branched and connected to the water injection pipe 5 by returning the flow meter 11
It is possible to adjust while monitoring, and to adjust the return flow rate to the condensate storage tank 1.

According to this configuration, the flow rate can be adjusted at the initial stage of reactor start-up or when the reactor is shut down, in which the injection flow rate is apt to change greatly, without adjusting the flow rate flowing from the pump start-up turbine 4. It can be easily implemented.

As shown by a broken line in FIG. 1A, instead of or in addition to the return flow meter 11, a water injection flow meter 12 mounted downstream of the water injection pipe 5 is connected to the return pipe 17 of the condensate storage tank. It is also possible to adjust the flow rate by installing it downstream.

In this case, the water injection flow rate is adjusted by adjusting the return flow rate, and the water injection flow rate of the reactor water injection system having a flow rate adjustment function equivalent to that of the conventional equipment in a simplified reactor water injection system pump and turbine equipment. Conditioning equipment can be provided. In addition, by using this flow rate adjustment method, it is also possible to change to the same flow rate control method in the conventional equipment.

Next, a second embodiment of the water injection flow rate adjusting equipment for a reactor water injection system according to the present invention will be described with reference to FIG. 1 (b). This embodiment is different from the first embodiment in that the water source is the pool water of the suppression pool 2 and a part of the suppression pool water is used as the suppression pool 2.
To return to.

That is, in FIG. 1 (b), a suppression pool 2 for storing suppression pool water to be injected into the reactor pressure vessel 7, a condensate storage tank 1 for storing condensed water, and cooling water as cooling water. Injection pump 3 for injecting condensate or suppression pool water into reactor pressure vessel 7
It has.

A pump driving turbine 4 for driving the water injection pump 3 by steam generated from the reactor pressure vessel 7, an injection valve 6 for connecting the water injection pump 3 and the reactor pressure vessel 7 and transferring cooling water; A water supply pipe 5 having a system flow meter 10, and a suppression pool return pipe 18 having a flow control valve 15 and a return flow meter 11, which is branched and connected to the water supply pipe 5 and returns a part of the cooling water to the suppression pool 2. I have. The suppression pool return pipe 18 can perform the same function by installing the return flow meter 11 in the conventional recirculation pipe 22.

According to the present embodiment, the suppression pool water can be transferred from the suppression pool 2 to the water injection pipe 5 by the water injection pump 3 and injected into the reactor pressure vessel 7. Here, the flow rate of water injection into the reactor pressure vessel 7 is adjusted while monitoring the flow rate control valve 15 on the suppression pool return pipe 18 branched and connected to the water injection pipe 5 with the return flow meter 11, and the flow rate to the suppression pool 2 is adjusted. It becomes possible by adjusting the return flow rate.

As shown by the broken line in FIG. 1 (b), it is also possible to install the water injection flow meter 12 instead of or in addition to the return flow meter 11 downstream of the suppression pool return pipe 18 of the water injection pipe 5. The flow rate can be adjusted.

In this case, the water injection flow rate is adjusted by adjusting the return flow rate, and in a simplified reactor injection system pump and turbine equipment, a turbine driven reactor injection system having a flow adjustment function equivalent to that of the conventional equipment is provided. Water injection flow control equipment can be provided. In addition, by using this flow rate adjustment method, it is also possible to change to the same flow rate control method in the conventional equipment.

Next, referring to FIG. 2, a third embodiment of a water injection flow rate adjusting device for a reactor water injection system according to the present invention will be described. This embodiment is different from the first and second embodiments in that the water source is selected from condensate or suppression pool water, and a part of the condensate or suppression pool water is condensed in the storage tank 1 or the suppression pool 2. Is to choose back.

In the present embodiment, as shown in FIG. 2, the suppression pool 2 for storing the suppression pool water to be injected into the reactor pressure vessel 7 and the condensate to be injected to the reactor pressure vessel 7 are stored. A condensate storage tank 1 to be kept and a water injection pump 3 for injecting condensate or suppression pool water as cooling water into the reactor pressure vessel 7.

Further, a pump driving turbine 4 for driving the water injection pump 3 by steam generated from the reactor pressure vessel 7, an injection valve 6 for connecting the water injection pump 3 and the reactor pressure vessel 7 and transferring cooling water; A return flow meter 11 and a flow control valve 15 which are branched and connected to a water supply pipe 5 having a system flow meter 10 and a part of the condensate or suppression pool water to the condensate storage tank 1 or the suppression pool 2 And a condensate storage tank / suppression pool return pipe 19 having a switching valve 16.

Returning to the conventional recirculation pipe 22, the flow meter 1
1. The same function can be achieved by installing the flow control valve 15, adding a return pipe to the other return destination to which the recirculation pipe is not connected, and installing the switching valve 16.

According to the present embodiment, the condensate is transferred from the condensate storage tank 1 or the suppression pool water from the suppression pool 2 to the injection pipe 5 by the injection pump 3 and injected into the reactor pressure vessel 7. can do.

Here, the flow rate of the water injected into the reactor pressure vessel 7 is adjusted by returning the flow rate adjusting valve 15 of the condensate storage tank / suppression pool return pipe 19 branched and connected to the water injection pipe 5 to the flow meter.
It adjusts while monitoring at 11, and it is possible to select the switching to the condensate storage tank 1 or the suppression pool 2 by the switching valve 16, and to adjust the return flow rate.

As shown by the broken line in FIG.
Instead of or in addition to the return flow meter 11, the flow rate can also be adjusted by installing the water injection flow meter 12 downstream of the condensate storage tank / suppression pool return pipe 19 of the water injection pipe 5. Further, the flow control valve 15 can also provide the switching valve 16 with a function.

In this case, the water injection flow rate is adjusted by adjusting the return flow rate. In a simplified reactor injection system pump and turbine equipment, a turbine driven reactor injection system having a flow adjustment function equivalent to that of the conventional equipment is provided. Water injection flow control equipment can be provided. In addition, by using this flow control equipment, it is also possible to change to the same flow control method in the conventional equipment.

Next, an example of the flow monitoring equipment applied to the first to third embodiments will be described with reference to FIGS. That is, in the first to third embodiments, the flow rate monitoring equipment for the system flow rate, the flow rate of water injection into the reactor pressure vessel 7, and the return flow rate to the condensate storage tank return pipe 17 or the suppression pool return pipe 18 is shown. is there.

The first example shown in FIG.
Condenser storage tank return pipe 17 or suppression pool return pipe 18 or a return pipe 19 for both of them.
When the flow meter 11 is attached to the reactor, a differential flow meter (DF) 13 is provided between the return flow meter 11 and the system flow meter 10 to check the flow rate of water injected into the reactor pressure vessel 7 and the This is an example of connecting to.

The second example shown in FIG.
When the return flow meter 11 is attached to the return pipe 17 or the suppression pool return pipe 18 or the return pipe 19 of both of them, the return flow meter 11 and the injection flow meter are used to check the system flow rate. This is an example in which an addition flow meter (PF) 14 is provided and electrically connected.

In the third example shown in FIG. 3C, the flow control valve 15 is attached to the return pipe 17 of the condensate storage tank, the return pipe 18 of the suppression pool, or both of them, and provided in the water injection pipe 5. A water flow meter 12, a differential flow meter 13, and a system flow meter 10 are provided along the injection pump 3 side of the injection valve 6 to check the return flow of the condensate storage tank or the return flow of the suppression pool by the differential flow meter 13. This is an example that can be used.

The fourth example shown in FIG.
Condenser storage tank return pipe 17 or suppression pool return pipe 18 or a return pipe 19 for both of them.
Return to and attach the flow meter 11 and the flow adjustment valve 15,
Injection valve 6, water injection flow meter 12, and system flow meter 10
In this example, each flow rate can be monitored. In this example, since the flow rates before and after the branch can be monitored collectively, the workability of the operator can be improved.

Next, an example of equipment for automatically controlling the flow rate of water injection into the reactor pressure vessel applied to the embodiment according to the present invention will be described with reference to FIGS. That is, in the first to third embodiments, by automatically controlling the return flow rate of the return pipe 17 of the condensate storage tank, the return pipe 18 of the suppression pool, or both return pipes 19, the water injection into the reactor pressure vessel is performed. This is a method for automatically adjusting the flow rate.

First, a first example shown in FIG. 4A is based on the flow rate of the water flow meter 12 provided in the water supply pipe 5, the flow signal to be adjusted, and the open / close state of the flow control valve 15, Arithmetic unit
The flow control valve 15 provided in the condensate storage tank return pipe 17 or the suppression pool return pipe 18 or the return pipe 19 of both of them automatically adjusts the return flow rate by 20 and adjusts the water injection flow rate.

An example of the adjustment of the return flow rate by the flow rate calculator 20 in the first example will be described. That is, the target value is set to α by the flow rate target value setting means (not shown) for setting the target value of the flow rate in the water injection flow meter 12 guided to the reactor pressure vessel 7 by the injection pipe 5. The operation of inputting these setting conditions to the flow rate calculator 20 is indicated by arrows in a simplified manner in FIG. At this time, the flow calculator 20
Then, α is compared with an actual measured value β by the water injection flow meter 12 and when the value of (β−α) becomes larger than a predetermined positive value, the opening of the flow regulating valve 15 is changed. Adjust so that the flow rate on the return pipe 17 (or 18 or 19) side becomes larger. When the value of (β−α) is smaller than a predetermined negative value, the opening of the flow control valve 15 is reduced or closed, and the reactor pressure vessel 7
Adjust so that the flow rate of water injection to the side becomes large.

A second example shown in FIG. 4B is a return pipe 17 for a condensate storage tank or a return pipe for a suppression pool.
Based on the flow rate of the return flow meter 11 provided in the return pipe 19 and the flow rate signal to be adjusted and the open / close state of the flow rate adjustment valve 15, the flow rate arithmetic unit 20 automatically controls the The return flow is to be adjusted and the injection flow is to be adjusted.

An example of the adjustment of the return flow rate by the flow rate calculator 20 in the second example will be described. That is, the target value is set to α by flow rate target value setting means (not shown) for setting the target value of the flow rate in the return flow meter 11 returned to the condensate storage tank 1 or the suppression pool 2 by the return pipe 17 (18, 19). Is set in the flow rate calculator 20,
α is compared with an actual measured value β by the return flow meter 11, and when the value of (β−α) becomes larger than a predetermined positive value, the opening of the flow regulating valve 15 is reduced. Alternatively, it is closed so that the flow rate of water injected into the reactor pressure vessel 7 is increased. When the value of (β−α) is smaller than a predetermined negative value, the opening of the flow control valve 15 is increased so that the flow on the return pipe 17 (18, 19) side is further increased. Make adjustments.

The third example shown in FIG. 4 (c) is a condensate storage tank return pipe 17 or a suppression pool return pipe.
An automatic flow control valve (FCV) 23 is provided in the return pipe 18 or both return pipes 19, and the return flow is automatically adjusted by specifying the flow rate to be adjusted, thereby adjusting the water injection flow rate. In this example, the flow rate can be automatically adjusted only by the operator designating the flow rate, so that the operability for the operation of the flow rate adjustment valve by the operator can be improved.

Next, as shown in FIGS. 5A to 5D, as a configuration of the flow regulating valve 15 applied to the present embodiment, a flow regulating device combining an electric valve, a pneumatically operated valve, an orifice, and an automatic flow regulating valve 23. Will be described.

The first example shown in FIG.
The injection valve 6 attached to the valve is an electric valve or a pneumatic valve, and this valve is combined with an orifice 29 to adjust the flow.

The second example shown in FIG. 5 (b) consists in combining the automatic flow control valve 23 and the orifice 29 to adjust the flow rate. The third example shown in FIG. 5 (c) shows a plurality of electrically operated or pneumatically operated valves 31 and orifices 29.
To adjust the flow rate.

In the fourth example shown in FIG. 5D, a bypass pipe 30 is attached to a recirculation pipe 22 which is also conventionally installed, and a flow control valve 15 and an orifice 29 are connected to the bypass pipe 30.
To adjust the flow rate. An electric or pneumatic valve 31 and an orifice 29
Are connected in series. According to this example, pressure distribution to the turbine-driven reactor water injection system at high pressure can be performed, and valve design conditions can be made advantageous.

[0063]

According to the present invention, since the flow rate of water injection into the reactor pressure vessel can be adjusted, the simplified flow injection pump and turbine equipment of the reactor has a flow adjustment function equivalent to that of the conventional equipment. You can have it. Also,
Advantages to operator system monitoring, flow control operability, and valve design conditions can be added.

[Brief description of the drawings]

FIG. 1 (a) is a system diagram showing a first embodiment of a water injection flow control device for a reactor water injection system according to the present invention, and FIG. 1 (b) is a system diagram showing a second embodiment of the same.

FIG. 2 is a system diagram showing a third embodiment.

FIG. 3A is a system diagram showing a first example of a flow monitoring facility applied in the embodiment of the present invention, FIG. 3B is a system diagram showing a second example, and FIG. 3 is a system diagram showing an example of FIG. 3, and (d) is a system diagram showing a fourth example.

FIG. 4A is a system diagram showing a first example of an automatic flow control device applied in an embodiment of the present invention, FIG. 4B is a system diagram showing a second example, and FIG. Third system diagram.

5A is a system diagram showing a first example of a flow control valve applied in an embodiment of the present invention, FIG. 5B is a system diagram showing a second example, and FIG. 3 is a system diagram, and (d) is a fourth system diagram.

FIG. 6 (a) is a system diagram showing a first example of a conventional water injection flow control device for a turbine driven reactor water injection system, and FIG. 6 (b) is a system diagram showing a second example of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Condenser storage tank, 2 ... Suppression pool, 3 ... Water injection pump, 4 ... Turbine for pump drive, 5 ... Water injection pipe, 6
... Injection valve, 7 ... Reactor pressure vessel, 8 ... Steam control valve, 9 ...
Steam supply piping, 10… System flow meter, 11… Return flow meter, 12…
Injection flow meter, 13… Differential flow meter, 14… Additional flow meter, 15… Flow control valve, 16… Switching valve, 17… Condensate storage tank return pipe, 18… Suppression pool return pipe, 19… Return pipe of both, 20
... Flow calculator, 21 ... Recirculation valve, 22 ... Recirculation pipe, 23 ... Automatic flow control valve, 24 ... Turbine exhaust pipe, 25 ... Communication pipe, 26
… Rotary axis, 27… signal line, 28… signal line, 29… orifice,
30… Bypass piping, 31… Electric valve or pneumatic valve, 32
…Signal line.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuji Yamamoto 8th Shinsugita-cho, Isogo-ku, Yokohama, Kanagawa Prefecture Inside the Toshiba Yokohama Office (72) Inventor Akira Murase 8th Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa (72) Inventor Kazuo Hisashima 8-8 Shinsugita-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture F-term (reference) 2G075 AA03 BA12 CA27 DA05 EA10 FA11 FC04 FC14 GA24 GA28

Claims (5)

[Claims] 1. A reactor pressure vessel, a steam supply pipe connected to the reactor pressure vessel, a pump drive turbine connected to the steam supply pipe via a steam control valve, and a pump drive turbine Pool connected to the exhaust side of the turbine via a turbine exhaust pipe, a water injection pipe connected between the suppression pool and the reactor pressure vessel, and driven by the pump driving turbine attached to the water injection pipe A water injection pump, a system flow meter, a water injection flow meter, and an injection valve sequentially attached to the water injection pipe from the discharge side of the water injection pump toward the reactor pressure vessel, and the system flow meter and the water injection flow meter A water source return pipe branched and connected to the water injection pipe provided between the water source return pipe, a return flow meter and a flow rate adjustment valve attached to the water source return pipe, A water injection flow control facility for a reactor water injection system, comprising: a condensate storage tank connected to a downstream side of a return pipe; and a water source including the suppression pool or both. 2. The reactor water injection system according to claim 1, wherein at least two of the system flow meter, the water injection flow meter, and the return flow meter are connected to a flow calculator. Flow control equipment. 3. The water injection flow rate adjusting equipment for a reactor water injection system according to claim 1, further comprising an automatic adjusting device for automatically adjusting a return flow rate from said water injection pump to said water source. 4. The reactor water injection system according to claim 1, wherein the flow control valve comprises a valve for adjusting a flow rate by combining an electric valve, a pneumatically operated valve, an orifice, or an automatic flow control valve. Flow control equipment. 5. The rotary system of the water injection pump and the steam control valve are electrically connected.
Water injection flow control equipment for the reactor water injection system described in the table.