JPH04242122A - Safety-test supporting apparatus - Google Patents

Abstract

PURPOSE:To make the safety test more effective and to achieve the safe operation of a plant by positively utilizing the history of the safety tests on the next safety test. CONSTITUTION:A test-result judging part 18 judges whether an apparatus is excellent or not based on the data obtained by the safety test, and a test instruction processing part 17 gives the instruction for performing the safety test periodically to the control device of the apparatus and gives the instruction for performing the safety test again to the control device of the apparatus when it is judged that the apparatus is defective by the safety test, are provided.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety test support device that supports the implementation of safety tests on various types of equipment in a plant.

0002

[Prior Art] Conventionally, safety test support devices that support the implementation of safety tests on various equipment in plants include:
For example, JP-A-63-135202 and JP-A-62
There is one described in Japanese Patent No.-118407.

The former type of security test support device confirms the safety test conditions, suppresses fluctuations in the operating state of the target equipment prior to the safety test, returns to the normal operating state after the test is completed, and performs the safety test. This allows testing to be conducted in as stable a manner as possible. Furthermore, the latter safety test support device is provided with a storage means for storing the results of the safety tests, and is capable of sequentially displaying the history of the safety tests stored in the storage means.

0004

[Problem to be Solved by the Invention] When the results of a security test are negative, the equipment subject to the security test is inspected and sometimes repaired, but in general, once the equipment has been repaired, it is There is a high possibility that something abnormal will occur in our house. Conventional security test support equipment does not utilize such test results at all for the next security test, and because the test is performed at the same interval as the previous test interval, it is possible to detect equipment failure before the next security test is conducted. This was a frequent occurrence, rendering safety tests meant to prevent equipment failures meaningless.

[0005] Furthermore, when the results of a security test are negative, the cause of the failure in the equipment subject to the security test has conventionally been determined by directly inspecting various parts of the equipment, or by checking from a support device. The operator called up the safety test history of the device in question, and looked at this huge amount of data to estimate the cause of the failure.

[0006] As described above, such conventional safety test support devices only display the history of the safety test, and cannot utilize the history of the safety test for the next safety test.
There was a problem in that it was not possible to conduct an effective safety test.

[0007] The present invention has been made by focusing on these conventional problems, and utilizes the history of safety tests in the next safety test to make the safety tests more effective and to ensure stable operation of the plant. The purpose of this invention is to provide a security test support device that can perform the following tasks.

[0008]

[Means for Solving the Problems] A security test support device for achieving the above-mentioned purpose has an equipment status determining means for determining whether or not the target equipment is in good condition based on data obtained through a security test. and periodically instructs the control device of the device to conduct a security test, and if the device is determined to be defective through the security test, the control device of the device is instructed to perform a security test again. The present invention is characterized by comprising a test instruction means for instructing execution of a test.

[0009] Another security test support device for achieving the above object includes an implementation interval storage means for storing the implementation interval of the security test, and a test target according to the implementation interval stored in the implementation interval storage means. test instructing means for instructing a control device of the equipment to carry out a security test; equipment status determining means for determining whether the equipment is in good condition based on data obtained by the security test; The present invention is characterized by comprising an execution interval changing means for shortening the execution interval stored in the execution interval storage means when the equipment is determined to be defective.

[0010] Here, the execution interval changing means changes the execution interval when it is determined that the equipment is in good condition once or twice or more consecutively in a safety test that is conducted after once shortening the execution interval. Preferably, the interval can be changed to the original implementation interval.

[0011]Furthermore, the security test support device for achieving the above object includes an input means for inputting the cause of failure of the target equipment, the result of the security test, and the above-mentioned information corresponding to the result of the security test. a memory means for storing the cause of the failure; and when the equipment is determined to be defective by the safety test, a past security test similar to the result of the safety test is selected, and the cause of the failure in the past safety test is stored; The present invention is characterized by comprising a defect cause extracting means for extracting the cause of the defect, and a display means for displaying the extracted cause of the defect.

0012

[Effect] Generally, when a device is determined to be defective through a security test, the security test is conducted again to determine whether the device itself is defective or the test environment, etc., is defective. Often implemented. Furthermore, if a device is determined to be defective and is actually defective, there is a high possibility that it will fail again within a short period of time, so the next safety test is often conducted early.

Therefore, in the present invention, when the equipment status determining means determines that the target equipment is defective, the test instructing means immediately activates the control device of the equipment in order to conduct the security test again. A security test is instructed to be carried out, and a retest is automatically carried out. Also,
When the target device is determined to be defective, the implementation interval changing means shortens the implementation interval stored in the implementation interval storage means, thereby shortening the interval until the next implementation.

[0014] In this way, depending on the results of the safety test,
By automatically changing the period until the next safety test, not only does it reduce operator labor, but it also prevents plant abnormalities caused by equipment defects, thereby ensuring stable plant operation. Can be done.

[0015] If a device is found to be defective through a security test, it is necessary to immediately inspect and repair the device. In this repair, if the cause of the defect is known in advance, there is no need to repair parts that do not need repair, and the work can be completed in a short time. Therefore, in the present invention, a defect cause extraction means is provided so that the operator can immediately know the cause of the defect.

[0016] Each time a safety test is conducted, the cause of the defect is stored in the storage means in association with the result. When a security test is conducted and it is determined that the device is defective, the failure cause extraction means selects one from among the past security tests stored in the storage means that is similar to the results of the security test conducted. The cause of the failure corresponding to this is extracted. The extracted defect cause is displayed on the display means.

[0017] In this way, by estimating the cause of failure using the history of past safety tests, equipment repair work can be carried out quickly and reliable repairs can be carried out, thereby improving plant efficiency. Stable operation can be achieved.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 14.

As shown in FIG. 1, a security test support device 1
0 is connected to a process equipment control device 23 that controls various devices in the plant, and a process information processing device 24 that processes data from various devices in the plant.

The safety test support device 10 includes an input section 11 for inputting various information, a test execution timing processing section 12 that stores the safety test implementation interval and has a timer function and specifies the safety test implementation timing. A test permission condition determination processing unit 13 that determines whether the device is in a state suitable for implementing the security test based on data from the process information processing device 24 after the security test implementation period has elapsed, and the results of the security test, etc. A test result storage unit 15 that stores
and test result storage section 15 by controlling data from each section.
A storage processing unit 14 stores the data in the test result storage unit 15 and organizes the content stored in the test result storage unit 15 and outputs it to each unit, a display unit 16 displays various data, and a process equipment A test instruction processing unit 17 for the control device 23 and a process information processing device 24
The test result determination unit 18 determines whether or not the target device is in good condition based on the safety test result data from. The plant equipment group 26 is equipped with a test switch 2 so that a safety test can be performed manually by an operator.
8 is provided.

As shown in FIG. 2, the safety test support device 10 is provided as a device for performing safety tests on various plant equipment in a plant to which a combined cycle is applied.

The plant equipment group 26 of this plant includes an air compressor 26A, a gas turbine 26B, a generator 26C,
Steam turbine 26D, condensate pump 26E, circulating water pump 26F, condenser backwash valve 26G, high pressure steam control valve 26H,
It consists of a low-pressure steam control valve 26I, a high-pressure main steam stop valve 26J, a low-pressure main steam stop valve 26K, a condenser 26L, etc., and the output of a sensor (not shown) for detecting the status of each device is connected to the plant. It is supplied to the process information processing device 24 as process information indicating the operating state.

Next, the operation of the security test support device 20 configured as described above will be explained in detail by taking a security test for each type of equipment as an example.

First, a safety test of the high pressure main steam stop valve 26J will be explained based on FIGS. 3 to 8. FIG. 3 is for explaining the operation of each part in a safety test of the high-pressure main steam stop valve 26J. In addition, in the same figure, symbols T1 and T2 are timers, A1, A2, A3, A4, and A5.
, A6, A7 indicate AND logic, O1, O2 indicate OR logic, and N1, N2, N3, N4 indicate NOT logic.

In this embodiment, the time when the state of the equipment to be tested becomes ready for testing is the time when the high pressure main steam stop valve 26J has been fully open for 24 hours. The fully open state is monitored, and when the fully open state continues for 24 hours, a signal is output from the timer T1 in the test execution timing processing section 12. This is because the safety test for the high-pressure main steam stop valve 26J is performed once a day, so the safety test may be performed 24 hours after the previous test. Therefore, when the high-pressure main steam stop valve 26J is fully open for 24 hours, the timer T1 outputs a signal for designating the test timing. Furthermore, since the high pressure main steam stop valve 26J is often closed once within 24 hours, the test period for the high pressure main steam stop valve 26J was set to 24 hours.
This is because if the time is set, the safety test for the high pressure main steam stop valve 26J can be omitted. That is, the purpose of the safety test for the high-pressure main steam stop valve 26J is to confirm that the valve is not stuck and can be closed when tripped to properly shut off steam. For this reason,
By setting the test timing as described above, unnecessary test operations can be omitted.

When carrying out a safety test on the high-pressure main steam stop valve 26J, before starting the safety test, the test permission condition judgment processing unit 13 judges whether the operating state of the plant satisfies the test conditions. When making this determination, if the load of the plant, for example the load of the generator, has been 50% or more for more than 10 minutes, the low pressure main steam stop valve 2
K fully open, high pressure steam control valve 26H fully open, low pressure steam control valve 2
It is determined whether the AND conditions of 6I fully open and normal vacuum of condenser 26L are satisfied. When this AND condition is satisfied and the high-pressure main steam stop valve 26J is fully open for 24 hours, the test instruction processing unit 17 sends the process equipment control device 23 to perform a safety test on the high-pressure main steam stop valve 26J. encourage. When the test switch 28 is operated to the automatic side, the test electromagnetic valve is energized by the implementation command, and the high-pressure main steam stop valve 26J is closed.

Note that when the test switch 28 is not operated to the automatic side, the operation message "Please perform the opening/closing test of the high pressure main steam stop valve" is displayed on the display device 3.
displayed on the second screen. Then, when the operator operates the manual test switch 28 based on this operation message, the test solenoid valve is energized, and the high-pressure main steam stop valve 26J is energized.
becomes closed. Further, the operation message can also be sent by voice. Outputting the operation message is effective in case the operator forgets to operate the test switch 28.

After the high pressure main steam stop valve 26J is closed, the test solenoid valve becomes de-energized, and the high pressure main steam stop valve 26J is closed.
6J returns to the fully open state and the safety test ends. When the safety test is completed, based on the test results, the high pressure main steam stop valve 26
The test result determining unit 18 determines whether J is good or not. This judgment is made based on the following three items. (1) The time required for the test is within the specified value (2) The rate of change in valve opening degree during the short period of time during the test is within the specified value (
3) Almost the same as normal valve opening/closing pattern (time vs. valve opening degree) When all the conditions of the above three items are satisfied, the test result is displayed as OK, and otherwise, the test result is displayed as Fail.

[0029]More accurate judgment results can be obtained by setting the required time for the test and the specified value (normal value) of the rate of change of the valve opening degree in advance using the main steam pressure as a parameter. . Further, by preparing a plurality of valve opening/closing patterns using main steam pressure as a parameter, it is possible to obtain more accurate determination results. In addition, safety tests are performed during load operation, but if the plant is controlled by AFC signals from the central power dispatch center, the load control ALR mode (main control mode on the power plant side) can be used to improve stability. This makes it possible to conduct safety tests under safe conditions.

[0030] In this way, in this embodiment, the safety test can be automatically carried out only when the operating state of the plant is suitable for the safety test, so that the operating state of the plant is not adversely affected. It is possible to carry out safety tests without having to use the system, and at the same time, it is possible to reduce the burden on the operator.

[0031] Here, a display example of the safety test results will be explained using FIG. 4. The safety test display screen displays operation item names, test date and time, test pass/fail judgment results, operating curves, etc. This screen is constantly displayed on the screen of the display unit 16 during the test, and the test process can be monitored using the operating curve.
It is also possible to display it automatically only when In addition, since the previous performance is often used as a reference for safety tests, the results of the previous or earlier tests (indicated by the two-dot dashed line among the operating curves in Figure 4) were used this time ( Among the operating curves in Figure 4, those indicated by solid lines)
It is also possible to display it in addition to. The results of the safety test are stored in the test result storage section 15 as a safety test history, and the contents can be sequentially displayed on the display section 16 by operating the input section 11. When it is determined that the high pressure main steam stop valve 26J is defective through the safety test, "failure" is displayed on the screen, and the cause of the defect is also displayed.

The display of the cause of the defect will be explained according to the flowchart shown in FIG. When you perform a security test (
Step 11), the test result determining unit 18 determines whether the test result is acceptable or not (step 12). If the test result is good, "Good" is immediately displayed on the screen (step 13). If the test result is poor, the storage processing unit 14 searches the test result storage unit 15 (step 14), and if there is no similar track record (step 15),
In addition to displaying the test result "failure", pre-registered failure cause candidates are also displayed (step 17). Here, possible causes of failure of the high-pressure main steam stop valve 26J include "valve stem sticking abnormality,""test solenoid valve abnormality," and "valve opening detection system abnormality." Now let's display all of these. Also, if there is a similar track record (step 15), the test result will be "fail".
At the same time, among the defect cause candidates mentioned above, causes of defects with similar results are displayed separately from other causes of defects (
Step 16).

In this embodiment, since the cause of failure in a similar performance was "valve stem stick abnormality," the color of the display area was changed to distinguish this from other causes of failure. Past similar results (indicated by a one-dot broken line among the operating curves in FIG. 4) are displayed on the screen together with the current results and the previous results.

The cause of the defect is actually confirmed during the inspection of the equipment after the result of the safety test is determined to be defective, and this is associated with the safety test result from the input section 11 and stored as the test result. Enter it in section 15. Note that the operation of extracting the cause of the defect from past results in steps 14 and 15 is performed by the storage processing unit 14. In this way, when the cause of the failure is displayed, the operator takes measures to eliminate the cause of the failure, but in reality, the same safety test is repeated again in what is called a "reproduction test." This often involves investigating the detailed cause.

[0035] In this embodiment, a re-run security test is automatically carried out. This operation will be explained using the flowchart of FIG. When a safety test is carried out (step 21) and the test result is determined to be good (step 22), "Good" is immediately displayed as described above (step 27), but the test result is poor. If it is determined (step 22), the security test is performed again (step 23). After the number of retests is counted (step 24), the result of the retest is determined (step 25). At this time, if the test result is bad, "fail" is immediately displayed. Further, if the test result is good, it is determined whether or not the number of retests is the first time (step 26), and then the retest is performed again (step 23). If the test result is bad (step 25), "fail" is displayed on the screen (step 28), and if the test result is good (step 2
5) Since the second retest was successful, it is determined that the first security test was a test error due to the influence of the test environment, etc., and "Good" is displayed on the screen (step 27). Here, the retest instruction is carried out by the test instruction processing section 17 in the same way as the first safety test, but the AND condition with the timer T1 is not taken into consideration in the judgment by the test permission condition judgment processing section 13. In other words, the timing of the test is not taken into consideration.
Only consideration is given to whether or not the high pressure main steam stop valve 26J is in a suitable condition for conducting the test.

In this embodiment, the retest is performed twice, but the number of retests cannot be determined fixedly, but is determined for each device, taking into account the importance of the device. It is something that should be done. Therefore, the number of retests may be one if the device is of low importance, or three or more times if the device is of high importance.

[0037] If the result of the safety test is poor, there is a method of immediately retesting as described above.
Separately or in combination with this, it is also possible to shorten the interval between safety tests. In other words, if the results of the safety test are negative, we will investigate the cause and take countermeasures, such as by conducting the above-mentioned retest.
It is conceivable that once a malfunction has occurred in a device, the malfunction will occur again, and for this reason, it is desirable to carry out the next safety test earlier (for example, by half the normal cycle). To use a human analogy, if a physical abnormality is discovered during a regular health checkup once a year,
Even if this condition is completely cured, the frequency of diagnosis will be limited to, for example, once every six months for the time being.

A method for shortening the interval between safety tests when the result of the safety test is negative will be explained using the flowchart shown in FIG. Conducted safety tests (
In step 31), if the test result is good (step 32), the next safety test is carried out without shortening the test execution interval (step 37). If the result of the security test is negative (step 32), the interval between security tests is shortened (step 32). Shortening of the execution interval is performed by the test execution timing processing unit 12 changing the execution interval stored in itself in response to an instruction from the test result determination unit 18. Then, the next safety test is performed at the shortened implementation interval (step 34), and it is determined whether the test result is good or not (step 35). If the test result is good, the test interval is returned to its original value (step 36), and the next safety test will be carried out at regular test intervals (step 37). If the test result is unsatisfactory, the next safety test is carried out with the interval shortened (step 37). Note that when the test results are determined to be defective twice in a row, the interval between tests may be further shortened. In addition, when restoring the test interval, rather than restoring the test interval when one test result is good, we will restore the test interval only when the test result is good two or more times in a row. You may also do so.

Next, a safety test of the high pressure steam control valve 26H will be explained based on FIG. 8. When performing a safety test on the high-pressure steam control valve 26H, as shown in FIG. 8, by setting the implementation period to one month, the safety test can be automatically performed in the same way as the high-pressure main steam stop valve 26J. .

Next, ST (Steam Turbin)
A safety test of the trip solenoid valve will be explained based on FIG. 9. Although not shown in FIG. 2, the ST trip solenoid valves control the high-pressure main steam stop valve 26J, and two ST trip solenoid valves are connected in series to the actuator of the high-pressure main steam stop valve 26J.

[0041] The safety test of the ST trip solenoid valve is carried out for one solenoid valve 1 for one week, for the other one solenoid valve for one week + α, and for further testing. The determination condition is that the steam turbine 26D is not in the stop phase. Steam turbines normally trip once a week, so the previous test
It can be done in a week. That is, since the ST trip solenoid valve will necessarily become de-energized within one week due to unit stoppage, this operation will serve as a safety test for the ST trip solenoid valve, making it possible to omit the safety test. However, since the ST trip solenoid valve outputs a trip signal in a de-energized state, two solenoid valves are installed to prevent malfunction, and the interlock is ANDed.
conditions to generate a turbine trip signal.

Therefore, the ST trip solenoid valve must be tested one by one. That is, both S
If the T-trip solenoid valves go into a de-energized state at the same time, the unit will stop, so a slight difference α is made between the timings at which the two ST-trip solenoid valves operate. This difference α needs to be greater than the time required for the ST trip solenoid valve test.

Next, a safety test of the ST advance emergency governor circuit will be explained based on FIG. 10. The ST preceding emergency governor circuit is a circuit for preventing a sudden increase in the rotation speed of the turbine when the load on the steam turbine 26D is suddenly removed. Note that this circuit is not shown in FIG. The safety test for the ST preceding emergency governor circuit is set to be carried out for one week for each circuit A, B, and C, and the judgment condition for carrying out the safety test is that it is neither a start phase nor a stop phase. That is, this is performed on the condition that the steam turbine is in operation.

Next, the safety test of the ST emergency oil pump will be explained based on FIG. 11. To conduct the safety test of the ST emergency oil pump, the condition where the oil pump is stopped is 1.
The period of time that has been continued for a week is set as the implementation period, and as a test condition determination item, it is detected that the test is neither a start phase nor a stop phase. Then, according to the execution command, the oil pump is turned off, the oil pressure is lowered, and the oil pump is started. When stopping the oil pump, the test valve is set to the normal side and the oil pump is stopped on condition that the discharge pressure of the oil pump continues to be equal to or higher than a specified value for a certain period of time.

Next, a safety test of the condenser backwash valve 26G will be explained based on FIG. 12.

The safety test of the condenser backwash valve 26J is carried out when the backwash valve normal wash position continues for 24 hours.
Seawater system master is not in progress, circulating water pump 26F
is in operation, the test condition is that the condenser 26L has a normal vacuum.

When automatically carrying out the safety test of the condenser backwash valve 26G, the condition is that the backwash operation of the condenser backwash valve 26G is automatically performed and the backwash position has been reached. 30
After a few minutes, the backwash valve 26G is returned to the normal wash position. Then, the quality of the implementation result is displayed depending on whether the backwash valve 26G is in the backwash state or the forward wash state. If the implementation result is negative, the probable cause is backwash valve stick,
A fault in the electrical system of the backwash valve motor is displayed.

[0048] Above are the specific safety tests for the high-pressure main steam stop valve 26J, high-pressure steam control valve 26H, ST trip solenoid valve, advance emergency governor circuit, ST emergency oil pump, and condenser backwash valve 26G. However, these valves other than the high-pressure main steam stop valve 26J can be re-tested,
Needless to say, the cause of the defect will be displayed.

As mentioned above, the results of the safety tests on the various types of equipment are stored in the test result storage unit 15, but there are many pieces of equipment that are subject to safety tests in one plant, and they are periodically tested. Since security tests are performed repeatedly, the storage capacity required for the security test support device 10 becomes enormous. To save safety test results,
There is a storage period based on laws and regulations or standards established by each power plant, etc., and items that have passed this period will be subject to unnecessary memory expansion,
To avoid information confusion, it will be deleted.

Since various methods can be considered for erasing the security test results, the erasing methods will be explained using FIG. 13. Conduct a security test (steps 41, 42),
When saving these results, the storage processing unit 14 determines whether or not any of the results stored in the test result storage unit 15 have passed the storage period (step 4).
3). If there is no test result whose storage period has passed, this test result is immediately stored in the test result storage section 15. If there are any items whose storage period has passed, they will be deleted using the following three methods, taking into account the importance of the test results and the equipment involved. Case 1: All items whose retention period has passed are deleted (step 44-1). Case 2: Among the items whose storage period has passed, all items other than those with poor test results are deleted (step 44-2). Therefore, even if the storage period has passed, those with poor test results will be stored. Case 3: Among the items whose storage period has passed, all items other than those with poor test results, test items with good test results, and implementation dates are deleted (step 44-3).
). When the deletion of the items whose storage period has passed is completed, the test results are stored (step 45). When saving test results, the retest results are of course saved, but it is not possible to save the test results before the retest by rewriting them or by adding the retest results to the test results before the retest. I do not care.

[0051] Even if the storage period has passed, for items that must be saved, such as extremely rare test results, a code indicating that they cannot be deleted is added to the beginning of the test result data. It may also be made so that it cannot be deleted.

[0052] The results of the security test can be displayed in detail as explained based on FIG. 4, but as shown in FIG. You can also do that. This display screen displays test items, execution date and time, execution results, cause of failure, etc. These can be sequentially recalled from the test result storage section 15 and displayed on the display section 16 as needed, and can also be output as a safety test implementation result report from a printer, although not shown in FIG. can.

[0053]

[Effects of the Invention] According to the present invention, the timing of the next safety test can be advanced according to the results of the safety test, and the safety test can be conducted before plant abnormalities caused by equipment failure occur. Therefore, plant abnormalities can be prevented and stable operation of the plant can be achieved.

[0054]Furthermore, by using the history of past safety tests, the cause of the defect can be estimated and the cause of the defect can be ascertained, so that repair work on the equipment can be carried out quickly and repairs can be carried out reliably. As mentioned above,
Stable operation of the plant can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of a security test support device according to an embodiment of the present invention.

FIG. 2 is a system diagram of a power generation plant according to this embodiment.

FIG. 3 is an explanatory diagram showing the operation of a safety test of the high-pressure main steam stop valve according to the present embodiment.

FIG. 4 is an explanatory diagram of a display screen for safety test results according to the present embodiment.

FIG. 5 is a flowchart for estimating the cause of failure in this embodiment.

FIG. 6 is a flowchart showing a procedure for performing a re-security test according to the present embodiment.

FIG. 7 is a flowchart illustrating a security test implementation procedure with a shortened implementation interval according to the present embodiment.

FIG. 8 is an explanatory diagram showing the operation of a safety test of the high-pressure steam control valve according to the present embodiment.

FIG. 9 is an explanatory diagram showing the operation of a safety test of the ST trip solenoid valve according to the present embodiment.

FIG. 10 is an explanatory diagram showing the operation of the safety test of the advance emergency governor circuit according to the present embodiment.

FIG. 11 is an explanatory diagram showing the operation of the safety test of the ST emergency oil pump according to the present embodiment.

FIG. 12 is an explanatory diagram showing the operation of a safety test of the condenser backwash valve according to the present embodiment.

FIG. 13 is a flowchart showing a procedure for recording security test results in this embodiment.

FIG. 14 is an explanatory diagram for explaining the contents of the safety test implementation result report of this embodiment.

[Explanation of symbols]

10... Security test support device, 11... Input section, 12... Test implementation timing processing section, 13... Test permission condition determination processing section, 14... Storage processing section, 15... Test result storage section, 1
6... Display section, 17... Test instruction processing section, 18... Test result judgment section, 23... Process equipment control device, 24... Process information processing device, 26... Plant equipment group.

Claims (10)

[Claims] Claims: 1. A safety test support device that supports the implementation of safety tests on various types of equipment in a plant, including equipment status that determines whether or not the equipment is in good condition based on data obtained from the safety test. A determining means periodically instructs the control device of the device to conduct a security test, and if the device is determined to be defective by the security test, the device instructs the control device of the device again. 1. A security test support device comprising: test instruction means for instructing implementation of a security test. 2. A safety test support device for supporting the implementation of safety tests performed on various equipment in a plant, comprising: an implementation interval storage means for storing an implementation interval of the safety test; a test instructing means for instructing a control device of the equipment to carry out a security test according to the implementation interval; and an equipment status judgment device for determining whether the equipment is in good condition based on data obtained from the security test. and an implementation interval changing unit that shortens the implementation interval stored in the implementation interval storage unit when the equipment is determined to be defective. 3. The execution interval changing means, when it is determined that the equipment is in good condition once or twice or more consecutively in a safety test conducted after once shortening the execution interval,
3. The security test support apparatus according to claim 2, wherein the execution interval is changed to the original execution interval. 4. The security system according to claim 1, further comprising storage means for storing the results of the security test and display means for displaying the contents stored in the storage means. Test support equipment. 5. Storage means for storing the results of the security test; and when it is determined that the equipment is defective as a result of the security test, the results are stored in the storage means together with the results of the security test. 4. The safety test support device according to claim 1, further comprising display means for displaying the results of the previous safety test among the contents. 6. A safety test support device for supporting the implementation of safety tests performed on various equipment in a plant, comprising: an input means for inputting a cause of failure of the equipment; a result of the safety test; a storage means for storing the cause of the failure in correspondence with the result; and a storage means for storing the cause of the failure in correspondence with the result; 1. A safety test support device comprising: a defect cause extraction means for extracting a defect cause in a safety test; and a display means for displaying the extracted defect cause. 7. The safety test support apparatus according to claim 6, wherein the display means displays the cause of the defect and also displays the corresponding results of the past safety test. 8. A security test support device for supporting the implementation of security tests performed on various equipment in a plant, comprising: a storage means for storing the results of the security tests; A security test support device comprising: erasing means for erasing the results of the test. [Claim 9] From data obtained from a security test,
A device status determining means is provided for determining whether the device is in good condition, and the deleting device is configured to delete a security test result in which the device is determined to be in good condition among the results of the security test for which a predetermined retention period has passed. 9. The security test support device according to claim 8, wherein only the results of the test are deleted. 10. Equipment status determining means for determining whether or not the equipment is in good condition based on data obtained by a security test, wherein the erasing means deletes data from the security test for which a predetermined retention period has passed. 9. The security test support device according to claim 8, wherein only predetermined contents are deleted from among the results of the security test in which the device is determined to be in good condition.