KR101022268B1 - Pump unit for loca test system and method of controlling the same - Google Patents

Abstract

PURPOSE: A pump unit for a LOCA(Loss of Coolant Accident) test system and a method for controlling the same are provided to reduce time during which an erroneous pump is replaced with a new pump. CONSTITUTION: The first pump(121) is arranged in the first branched pipe(131) branched from an inlet pipe(110). The second pump(122) is arranged the second branched pipe(132) branched from the inlet pipe. An outflow pipe(160) couples the first branched pipe with the second branched pipe. A pressure measurement unit(150) measures pressure of flowing fluid. The first load supplies fluid to the first and second pumps until the amount of fluid of the first branched pipe is the same as the amount of fluid of the second branched pipe. A controller compares measured pressure with preset pressure to control a pump.

Description

Pump unit for LOCA test system and method of controlling the same}

The present invention relates to a pump unit and a pump unit control method, and more particularly, to a pump unit for a locatest system and a pump unit control method for a locatest system.

In general, the LOCA teat chamber system is used for testing reactor coolant loss incidents. Loss-of-coolant accident (LOCA) is an accident that occurs due to rupture damage of the reactor coolant system.

Locatest system is a device that simulates the above-mentioned accident, a system for testing the environmental resistance and operability of the peripheral device for the above-mentioned accident and the conventional locatest system is provided with a steam boiler for generating steam, A pipe through which steam flows is provided. In addition, a control valve provided in the pipe to control the amount of steam flowing in the pipe is provided.

Meanwhile, the locatest system may include a first pump and a second pump to supply fluid to the locatest chamber. In this case, when the locatest system is generally operated, the locatest system is driven by using the first pump or the second pump. At this time, the second pump is not operated when the first pump is used. Therefore, when the first pump failed, the experimenter manually switched the second pump to operate the locatest system.

However, in this case, the operation of the locatest system was stopped until the first pump was stopped and the second pump was operated. Therefore, during the above time, the efficiency of the Locatest system was reduced and a safety accident occurred.

Embodiments of the present invention are to provide a pump unit for a Rocatest system and a pump unit control method for a Rocatest system to control the pump by measuring the pressure change.

One aspect of the present invention, the first pump disposed in the first branch pipe branched from the inlet pipe, the second pump disposed in the second branch pipe branched from the inlet pipe, the first branch pipe and the first An outlet pipe coupled to the second branch pipe, a pressure measurer disposed in the outlet pipe to measure a pressure of the fluid flowing through the outlet pipe, and an amount of fluid flowing through the first branch pipe and the second branch pipe; Applying a first load to the first pump and the second pump so that the same, and compares the pressure of the fluid measured in the pressure measuring unit with a predetermined set pressure to the pressure of the fluid measured in the pressure measuring unit If it is determined that the pressure is less than the set pressure, the locatest system including a control unit for controlling to apply a second load twice the first load to the first pump and the second pump It may provide a pump unit for.
In addition, when it is determined that the pressure of the fluid measured by the pressure measuring unit exceeds the set pressure, the controller may apply the third load smaller than the first load to the first pump and the second pump. have.
In addition, when the pressure of the fluid measured by the pressure measuring unit is equal to the set pressure, the controller may maintain the state of the first pump and the second pump.
The apparatus may further include a first pump controller configured to control the first pump by receiving a control signal from the controller.
The apparatus may further include a second pump controller configured to control the second pump by receiving a control signal from the controller.
The apparatus may further include a first check valve disposed between the first branch pipe and the outlet pipe to control the first branch pipe.
The apparatus may further include a second check valve disposed between the second branch pipe and the outlet pipe to control the second branch pipe.
According to another aspect of the present invention, there is provided a first step of driving a first load by inputting a first load to a first pump and a second pump; A third step of inputting a second load equal to twice the first load to the first pump and the second pump when the pressure of the fluid is less than a preset set pressure; It can provide a pump unit control method for a Rocatest system comprising a.
Further, when the pressure of the fluid measured in the third step exceeds the set pressure, the third load smaller than the first load may be applied to the first pump and the second pump.
In addition, when the pressure of the fluid measured in the third step is equal to the set pressure, the first load may be continuously input to the first pump and the second pump.

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The embodiments of the present invention can stably operate the locatest system by operating the first pump or the second pump even when the first pump or the second pump fails. In addition, it is possible to easily control the first pump and the second pump to increase the performance of the locatest system.

1 is a circuit diagram showing a pump unit for a Locatest system according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a control flow of the pump unit for the locatest system shown in FIG. 1.
FIG. 3 is a flowchart showing a control procedure of the pump unit for the locatest system shown in FIG. 1.

1 is a circuit diagram illustrating a pump unit 100 for a locatest system according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the pump unit 100 for the locatest system may include an inlet pipe 110. In this case, the inflow pipe 110 may flow by flowing fluid from the outside.

The pump unit 100 for the locatest system may include a first branch pipe 131 branched from the inlet pipe 110. The first branch pipe 131 may branch and flow the fluid flowing through the inlet pipe 110.

The pump unit 100 for the locatest system may include a second branch pipe 132 disposed on one side of the first branch pipe 131. The second branch pipe 132 may be branched from the inlet pipe 110 so that one end thereof is fastened to the first branch pipe 131. At this time, one end of the first branch pipe 131 and the second branch pipe 132 may be integrally formed with each other.

Meanwhile, the first branch pipe 131 and the second branch pipe 132 may be branched from the inflow pipe 110 to be joined to each other at the other end.

The pump unit 100 for the locatest system includes a first pump 121 disposed in the first branch pipe 131. The first pump 121 may apply an operating force to flow the fluid of the first branch pipe 131.

The pump unit 100 for the locatest system includes a second pump 122 disposed in the second branch pipe 132. The second pump 122 may apply an operating force to flow the fluid in the second branch pipe 132.

In this case, the first pump 121 and the second pump 122 may have the same capacity. In addition, the capacity of the first pump 121 and the second pump 122 may vary depending on the load applied thereto.

On the other hand, the pump unit 100 for the Locatest system includes an outlet pipe 160 that is fastened with the first branch pipe 131 and the second branch pipe 132. At this time, the outlet pipe 160 may be a fluid that is combined with the fluid flowing through the first branch pipe 131 and the second branch pipe 132.

The outlet pipe 160 may supply a flowing fluid to an external device. At this time, the pressure of the fluid flowing through the outlet pipe 160 may be kept constant.

The pump unit 100 for the rocatest system may include a first check valve 141 disposed between the first branch pipe 131 and the outlet pipe 160 to control the first branch pipe 131. In addition, the pump unit 100 for the locatest system may include a second check valve 142 disposed between the second branch pipe 132 and the outlet pipe 160 to control the second branch pipe 132. have.

In this case, the first check valve 141 may be disposed and operate in the same or similar manner as the second check valve 142. Hereinafter, for convenience of description, the first check valve 141 will be described in detail.

The first check valve 141 may be disposed in the first branch pipe 131. The first check valve 141 may prevent the fluid in the outlet pipe 160 from flowing back toward the first pump 121 when the first pump 121 is not operated. Therefore, when the first pump 121 breaks or breaks, it is possible to prevent the pressure of the outlet pipe 160 from being significantly reduced.

The pump unit 100 for the locatest system includes a pressure measuring unit 150 disposed in the outlet pipe 160. The pressure measuring unit 150 may measure the pressure of the fluid flowing through the outlet pipe 160. At this time, the pressure measuring unit 150 may include any device capable of measuring the pressure of the fluid flowing through the outlet pipe 160.

Meanwhile, the pump unit 100 for the locatest system includes a controller 170 that controls the first pump 121 and the second pump 122 based on the pressure of the fluid measured by the pressure measuring unit 150. .

In this case, the controller 170 may be variously formed. For example, the controller 170 may be an electronic component having a logic circuit. In addition, the controller 170 may be a personal computer.

The locatest system pump unit 100 may include a first pump control unit 181 for controlling the first pump 121 by receiving a control signal from the controller 170. In addition, the locatest system pump unit 100 may include a second pump control unit 182 to control the second pump 122 by receiving the control signal.

In this case, the first pump control unit 181 and the second pump control unit 182 may control the load applied to the first pump 121 and the second pump 122, respectively.

On the other hand, it will be described in detail with respect to the control method of the pump unit 100 for the loca test system.

FIG. 2 is a block diagram showing the control flow of the pump unit 100 for the locatest system shown in FIG. 1. FIG. 3 is a flowchart showing a control procedure of the pump unit 100 for the locatest system shown in FIG. 1.

2 and 3, when the experimenter operates the locatest system (not shown), the first pump 121 and the second pump 122 operate.

At this time, the control unit 170 controls the first pump 121 and the second pump 122 so that the pressure (X) of the fluid flowing through the outlet pipe 160 is a set pressure (Y).

That is, the controller 170 applies the first control signal to the first pump controller 181 and the second pump controller 182, respectively. When the first control signal is applied, the first pump control unit 181 and the second pump control unit 182 input the first load to the first pump 121 and the second pump 122, respectively.

The first pump 121 and the second pump 122 may be controlled to reach the set pressure Y by operating in the same manner when the first load is input.

For example, when the set pressure (Y) is 1 Bar, when the first load is input, the first pump 121 is the outlet pipe 160 so that the pressure of the fluid flowing through the outlet pipe 160 to form a 0.5 Bar. ) Can be supplied with fluid.

In addition, when the first load is input, the second pump 122 may operate in the same manner as the first pump 121 operates. (Step S110)

While the above process continues, the pressure measuring unit 150 measures the pressure X of the outlet pipe 160. At this time, the pressure measuring unit 150 transmits the measured pressure (X) of the measured outflow pipe 160 to the control unit 170 (step S120).

In this case, the pressure measuring unit 150 transmits the measured pressure X to the controller 170. The controller 170 compares the transmitted pressure X with the set pressure P (step S130).

If it is determined that the transmitted pressure X is equal to the set pressure Y, the controller 170 does not increase or decrease the load. In this case, the controller 170 may maintain the loads applied to the first pump 121 and the second pump 122 as the first load.

On the other hand, if it is determined that the transmitted pressure X is less than the set pressure P, the controller 170 may increase the pump unit 100 for the locatest system. In addition, the controller 170 may allow an external experimenter to recognize a malfunction of the pump unit 100 for the loca test system through an alarm or the like.

In particular, while the Locatest system continues to operate, either the first pump 121 or the second pump 122 may fail or break. Since the first pump 121 or the second pump 122 is similarly controlled when a failure or breakage occurs, the following description will focus on the case where the second pump 122 breaks or breaks.

When the second pump 122 stops due to failure or damage, the pressure X of the outlet pipe 160 measured by the pressure measuring unit 150 decreases momentarily. At this time, the pressure measurement unit 150 may be reduced by about half than the general case.

The controller 170 may increase the first pump 121 and the second pump 122 by inputting a second load to the first pump 121 and the second pump 122. The controller 170 may control the first pump controller 170 and the second pump controller 170 to input a second load to the first pump 121 and the second pump 122.

In this case, the second load may be set larger than the first load. For example, the second load may be set to twice the first load. At this time, when the second load is input, the first pump 121 may pump twice the fluid.

Therefore, the controller 170 may maintain a constant amount of fluid flowing through the outlet pipe 160 when the second pump 122 is broken or broke. (Step S140)

On the other hand, the second check valve 142 may prevent the fluid from flowing back from the outlet pipe 160 to the second branch pipe 132.

If the controller 170 determines that the transmitted pressure X exceeds the set pressure Y, the controller 170 controls the first pump control unit 181 and the second pump control unit 182, respectively. The third load is input to the first pump 121 and the second pump 122.

At this time, when the second pump control unit 182 inputs the third load to the second pump 122, the second pump 122 is stopped and does not operate.

On the other hand, when the first pump control unit 181 inputs the third load to the first pump 121, the first pump 121 may operate. In this case, the third load may be set smaller than the first load.

When the third load is applied to the first pump 121, the first pump 121 may pump less fluid than when the first load is input (S150).

Therefore, the pump unit 100 for the locatest system may send a fluid having a constant pressure to the outside. In addition, the pump unit 100 for the Rocatest system does not have a time delay for the replacement of the first pump 121 and the second pump 122, so that a safety accident that may occur due to the absence of fluid may be effectively prevented. have.

As mentioned above, although embodiment of this invention was described, the person of ordinary skill in the art should add, change, delete, add, etc. the component within the range which does not deviate from the idea of this invention described in the claim. The present invention may be modified and changed in various ways, which will also be included within the scope of the present invention.

100: pump unit for Rocatest system
110: inlet pipe
121: the first pump
122: second pump
131: first branch pipe
132: second branch pipe
141: first check valve
142: second check valve
150: pressure measuring unit
160: outflow pipe
170: control unit
181: first pump control unit
182: second pump control unit

Claims (16)

A first pump disposed in the first branch pipe branched from the inlet pipe,
A second pump disposed in a second branch pipe branched from the inlet pipe,
An outlet pipe connected to the first branch pipe and the second branch pipe,
A pressure measuring unit disposed in the outlet pipe and measuring a pressure of a fluid flowing through the outlet pipe;
A first load is applied to the first pump and the second pump such that the amount of fluid flowing through the first branch pipe and the second branch pipe is the same, and the pressure and the preset pressure of the fluid measured by the pressure measuring unit are preset. Control unit for controlling to apply a second load twice the first load to the first pump and the second pump when it is determined that the pressure of the fluid measured by the pressure measuring unit is less than the set pressure by comparing the set pressure Locatest system pump unit comprising a. delete delete delete delete The method according to claim 1,
If it is determined that the pressure of the fluid measured by the pressure measuring unit exceeds the set pressure, the control unit applies the third load smaller than the first load to the first pump and the second pump. Pump unit. The method according to claim 1,
And the control unit maintains the states of the first pump and the second pump when the pressure of the fluid measured by the pressure measuring unit is equal to the set pressure. The method according to claim 1,
And a first pump control unit configured to receive a control signal from the control unit to control the first pump. The method according to claim 1,
And a second pump controller configured to receive a control signal from the controller to control the second pump. The method according to claim 1,
And a first check valve disposed between the first branch pipe and the outlet pipe to control the first branch pipe. The method according to claim 1,
And a second check valve disposed between the second branch pipe and the outlet pipe to control the second branch pipe. A first step of inputting and driving a first load to the first pump and the second pump;
A second step of measuring the pressure of the fluid flowing through the outlet pipe in the pressure measuring unit; And
When the measured pressure of the fluid is less than a predetermined set pressure, a third load is input to the first pump and the second pump twice the first load to match the pressure of the fluid and the set pressure; The pump unit control method for a locatest system comprising a. delete delete The method of claim 12,
When the pressure of the fluid measured in the third step exceeds the set pressure, the pump unit control method for the locatest system for applying the third load less than the first load to the first pump and the second pump. . The method of claim 12,
And when the pressure of the fluid measured in the third step is equal to the set pressure, continuously inputting the first load to the first pump and the second pump.

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