KR200223712Y1 - Test Equipment for Optical Isolator and Logic Module on Reactor No. 1 Shutdown system - Google Patents

Abstract

The present invention relates to a test device for an optical isolator / logic module for a reactor first stop system, and includes: a slot (30) formed to mount the optical isolator (10); A slot 40 formed to mount the logic module 20; An optical isolator digital measuring means (50) having an interface (11) connectable to a corresponding terminal of the optical isolator (10) and including a circuit portion (12) for determining whether to operate normally for each channel through the interface; A circuit unit 14 having an interface 13 connectable to a corresponding terminal of the stop rod logic module 20 and a time measurement means for measuring the clutch coil power supply cutoff time for measuring the circuit portion 14 for measuring the voltage between both ends of the clutch power supply through the interface. Digital measuring means for logic module (60) comprising a; A power supply device 70 for supplying power required inside the apparatus; And a selection switch unit 80 composed of a plurality of switches to select a specific circuit requiring a test. According to the above configuration, the functions of the optical isolator and logic module, which have been difficult to measure in the past, can be easily mounted and tested in the slot, thereby reducing labor costs according to the reduction of working time, improving the reliability of the power plant by improving maintenance quality, and precision of measurement control. The improvement enables the safety of the reactor and the process system, as well as individual tests, so that fault checks have a quick effect.

Description

Test Equipment for Optical Isolator and Logic Module on Reactor No. 1 1 Shutdown system}

The present invention relates to a test device for a reactor 1 stop system optical isolator / logic module, and more specifically, an optical isolator and a Shut Off Rod Drop Logic Module (hereinafter referred to as a 'logic module'). It is related to a test apparatus configured to easily test a function by simply removing a field from the field and simply attaching it to a slot.

The emergency stop of the reactor when the operating parameters of the nuclear power plant exceeds the operating limit is to add a large amount of side reactivity to the core by dropping the stop rod into the moderator in the vertical direction. The fall of the stop rod is made by disconnecting the clutch coil power through the optical isolator / logic module. Therefore, functional test of optical isolator / logic module is very important, but until now, there is no way to test them individually. For example, during the SDS # 1 Trip Logic Control Loop test, the operator judges the loop test performance and soundness only by the lamp in the switchboard. Such a method can not help to solve the problem quickly, it acts as a risk to the safety operation of nuclear power plants, and has emerged as a barrier to securing reliability.

The present inventors provide a device that is easy to carry and overcomes the limitations of the prior art as described above, and can be easily tested by attaching the optical isolator and logic module to the device. It is for the purpose of the present invention.

For this purpose, the inventor

A slot formed to mount an optical isolator;

A slot formed to mount a logic module;

An optical isolator digital measuring means having an interface connectable with a corresponding terminal of the optical isolator and including a circuit unit for determining whether normal operation is performed for each channel through the interface;

A digital measurement means for a logic module having an interface connectable with a corresponding terminal of the stop rod logic module and including a circuit portion for measuring voltage between both ends of the clutch power supply and a time measurement means for measuring a clutch coil power cut-off time through the interface; ;

A power supply for supplying power required inside the apparatus; And

It is intended to achieve the above object by including a selector switch unit composed of a plurality of switches to select a specific circuit requiring a test.

1 is a circuit diagram of a reactor 1 stop system.

2 is a detailed circuit diagram of an optical isolator.

3 is a detailed circuit diagram constituting a logic module.

4 is a test apparatus of the present invention.

Figure 5 is an embodiment of a circuit portion for testing the optical isolator of the device of the present invention.

Figure 6 is an embodiment of a circuit portion for testing a logic module of the device of the present invention.

*** Explanation of symbols on main parts of drawings ***

1: LED lamp, 3: Pushbutton, 10: Photoisolator,

20: logic module, 21: clutch coil, 30, 40: slot,

11,13: terminal connection interface, 12,14: circuit portion, 15: drop switch,

16: time measuring means, 17: switch lamp, 50: digital measuring means for isolator,

60: digital measuring means for the logic module, 70: power supply, 80: selector switch

The present invention includes a test device for an optical isolator / logic module for a reactor first stop system.

The optical isolator includes a circuit for stopping the reactor by dropping the stop rod by shutting off the power of the clutch coil through the logic module when an abnormal state of the reactor occurs. Normally, the measured variables used in the case of abnormal state of the reactor constitute 3 channels each, and when the problem occurs in 2 or more of the channels, that is, when the 2 of 3 logic is satisfied, the power supply of the clutch coil By stopping the stop rod and stopping the stop rod, a series of processes to stop the nuclear reaction. This is called a first stop system, and the optical isolator is used for signal isolation of the stop circuit.

A circuit configuration diagram of the entire first stop system including the two logic circuits of the third is shown in FIG. 1. The optical isolator 10 is composed of two channels (a, b) and is configured to allow a current to flow in only one direction through each channel (terminal A to B). In addition, the external LED lamp 1 is installed to measure the health of whether the optical isolator constituting each channel (a, b) is operating normally. Therefore, it is possible to determine whether the circuit is operating normally by the blinking of the LED lamp through the above configuration.

2 is a detailed circuit diagram of the optical isolator. These circuits will be briefly described in a known configuration. First, the circuit includes a primary circuit on the left side and a secondary circuit on the right side. If any one of the three channels (D, E, F) connected to the outside while the predetermined voltage is applied to the terminals A, B is in a fail state, the driving voltage is caused by R3 between the base and the collector of the transistor Q1. And the Photocupola 2 of U1 is operated. At this time, the terminal L operates the Q2 by the operation of the U1 while a predetermined voltage is applied to turn on the LED lamp connected to the K and H terminals.

On the contrary, if Q1 is not operated, U1 is not operated and the LED lamp is turned off.

The logic module 20 of FIG. 1 includes a circuit operated by receiving a voltage according to the operation state of the optical isolator, and serves to temporarily shut off power of the clutch coil 21 of the stop rod during abnormal operation of the reactor. A detailed circuit constituting the logic module 20 is as shown in FIG. 3. The logic module is also briefly described with a known circuit configuration. In the normal state, the voltage through the optical isolator 10 is supplied to the J terminal, and the U1 photo cupola in the logic module is operated to be predetermined at both ends of the clutch coil (E, F). Maintain the voltage to keep the stop rod stationary. If an abnormal condition occurs in the 2 logic circuit of 3, the voltage supply through the optical isolator 10 is cut off and U1 does not operate, which eventually causes the stop rod to drop by shutting off the power of the clutch coil, and the stop rod is involved in the reaction. Absorb neutrons and completely stop the fission reaction in the reactor.

Push button 3 of Figure 1 is for the triggering (triggering) of the stop rod fall is necessary for the functional test of the entire stop rod. Typically, the logic module 20 is provided with a drop time control means to control the drop time of the maintenance rod. Therefore, the function of the specific stop rod can be tested by cutting off the voltage of the clutch coil for a predetermined time by setting the trigger by the push button 3 as a signal.

As a method for testing the normal operation of the conventional optical isolator 10 and the logic module 20 as described above, input side current / voltage, output side current / voltage, stop rod fall time measurement, or the like can be used. In more detail, the A and B terminals of the optical isolator are for supplying the primary side power of the optical isolator and can measure the health of the circuit given to the '0' bolt module centered on Q1 inside the module. It is connected to a resistor having the size of and when a current of a predetermined size is detected, it is determined to be normal. Terminals H and K can also be provided to test the operation and function of the Photo Cupola by connecting the LEDs to the secondary circuit. In this case, the output voltage and the current can be measured by connecting a predetermined resistor to the terminal K, and it can be determined whether or not the abnormal state by comparing with the value given during normal operation.

In addition, in the case of the logic module 20, it is possible to test whether the clutch is operated through the stop rod clutch coil terminals E and F.

The present invention includes a device for testing the normal operation of the optical isolator 10 and the logic module 20 as described above. In other words, the test apparatus of the present invention is an optical isolator / logic module for the reactor 1st stop system that can determine whether the equipment is normally operated by simply inserting the optical isolator and logic module used for various nuclear power generation into the test apparatus slot. It includes the test apparatus of.

4 shows a test apparatus of the present invention.

The functional test apparatus of the present invention includes a slot 30 formed to attach the optical isolator 10, a slot 40 formed to mount the logic module 20, and a corresponding terminal of the optical isolator 10. And a digital measuring means (50) for the optical isolator and a logic module (20) including an interface (11) connectable therewith and including a circuit portion (12) for determining normal operation of each channel through the interface. A digital measuring means for logic module having an interface (13) connectable to a corresponding terminal and including a circuit portion (14) for measuring the voltage across the clutch power supply and the time measurement means for measuring the clutch coil power off time through the interface. A wire composed of a plurality of switches 60 and a power supply 70 for supplying the power required in the apparatus, and a specific circuit requiring a test A switch unit 80. The selection switch unit 80 is indicated by an arrow in the figure.

The circuit constituting the optical isolator 10 is as described above, and each terminal is preferably connected at the same time as the insertion through the interface (connector) of the terminal formed on the inner surface of the slot constituting the device.

5 shows one embodiment of a circuit portion 12 for testing the optical isolator 10. In the circuit section, A, B, G, H, K, L, and S are terminals of circuits (not shown) constituting the optical isolator, and are connected to the circuit section 12 through the interface 11. The A and B terminals supply the primary power of the optical isolator. When the A and B terminals are connected to No. 2 (10kΩ) to test the integrity of the circuit given to the '0' volt module centering on Q1 inside the module, Indicates a selector switch for 135 mA. If the current measured at 2 times is 135mA, it can be determined as normal.

The terminal G maintains the signal ground state, and H and k can be used for the operation and function test of the photocupola. Specifically, in the embodiment, the resistors of 10 ㏀ and 100 연결 are connected to the LED through the selection switch. It is intended to test the flowing voltage. Then, when a predetermined voltage (eg, + 95V DC) is applied to the L terminal and U1 is operated, the LED is turned on. When the input / output switch is selected as 1, each voltage can be measured through the resistor connected to the K terminal. do. At this time, the measured voltage is output through the digital measuring means 50, and the operation of the switch 80-1 for selecting the channels a and b can check the measurement result according to the corresponding channel. The switch 80-1 may be configured integrally or separately from the digital measuring device.

6 shows one embodiment of a circuit portion 14 for testing the logic module 20. In the figure, terminals A, C, E, F, H, and J are terminals of circuits (not shown) constituting the logic module, and are connected to the circuit unit 14 through the interface 13 similarly to the optical isolator. . A terminal is for receiving a predetermined voltage supplied from the power supply for driving the logic module 20, the voltage supplied from the optical isolator 10 is made through the J terminal. The logic module of the present invention includes a drop switch 15 in the circuit unit 14 instead of a push button used in the field. The drop switch is connected to terminal C to turn on / off a + 95V DC power supply and the E terminal maintains ground. In the drawing, the F terminal is a voltage return through the optical isolator 10, and the H terminal supplies a voltage through a stop rod selector (not shown). In the figure, E and F terminals are terminals of the clutch coil, and in this embodiment, the switch lamp 17 of 100 장착 is mounted to check the contact, and the contact signal is displayed by the time measuring means 16 to determine the module to be tested. The function is tested and the voltage across the clutch is checked by means of digital measuring means 60.

According to the present invention, the functions of the optical isolator and logic module, which were previously difficult to measure, can be easily mounted and tested in the slot, thereby reducing labor costs according to the reduction of working time, improving the reliability of the power plant by improving maintenance quality, and precision of measurement control. The improvement enables the safety of the reactor and the process system, as well as individual tests, so that fault checks have a quick effect.

Claims (1)

A slot 30 formed to mount the optical isolator 10; A slot 40 formed to mount the logic module 20; An optical isolator digital measuring means (50) having an interface (11) connectable to a corresponding terminal of the optical isolator (10) and including a circuit portion (12) for determining whether to operate normally for each channel through the interface; A circuit unit 14 having an interface 13 connectable to a corresponding terminal of the stop rod logic module 20 and a time measurement means for measuring the clutch coil power supply cutoff time for measuring the circuit portion 14 for measuring the voltage between both ends of the clutch power supply through the interface. Digital measuring means for logic module (60) comprising a; A power supply device 70 for supplying power required inside the apparatus; And A test device for an optical isolator / logic module for a nuclear reactor first stop system, comprising: a selector switch unit (80) composed of a plurality of switches to select a specific circuit requiring a test.