CN112420229A - Out-of-pile nuclear instrument system periodic test device and test method thereof - Google Patents
Out-of-pile nuclear instrument system periodic test device and test method thereof Download PDFInfo
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- CN112420229A CN112420229A CN202011294857.0A CN202011294857A CN112420229A CN 112420229 A CN112420229 A CN 112420229A CN 202011294857 A CN202011294857 A CN 202011294857A CN 112420229 A CN112420229 A CN 112420229A
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- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
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- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
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Abstract
The invention discloses a device and a method for regularly testing an out-of-reactor nuclear instrument system, relates to the field of regularly testing the out-of-reactor nuclear instrument system of a nuclear power plant, and solves the problem of performing regular tests under the normal operation and shutdown states of a reactor. The device is used for generating a signal for simulating a neutron detector and sending the signal to the out-of-stack nuclear instrument system; the configuration unit is communicated with the signal source case, the signal source case provides source signals for the configuration unit, and the configuration unit processes the source signals and outputs analog signals. The device can complete all regular test items of the out-of-pile nuclear instrument system and timely find out equipment faults so that personnel can take corresponding measures to ensure the safe, stable and reliable operation of the nuclear instrument system and the safety of a nuclear power plant.
Description
Technical Field
The invention relates to a periodic test device for an out-of-core instrument system of a nuclear power plant, in particular to a periodic test device for an out-of-core instrument system and a test method thereof.
Background
The function of the nuclear instrumentation system outside the nuclear power plant is to continuously monitor changes in reactor power, power levels and power distribution. For this purpose, the nuclear instrument system outside the reactor is provided with a series of neutron detectors outside the reactor pressure vessel and corresponding signal processing equipment. The measured signals are indicated or recorded so as to provide the operator with information on the reactor status during core loading, shutdown, startup, and power operations.
The out-of-reactor nuclear instrument system belongs to a part of a reactor protection system, and in order to ensure the reliability of the system, a periodic test needs to be carried out under the normal operation and shutdown states of a reactor.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the invention provides a periodic test device and a periodic test method for a nuclear instrument system outside a reactor, which solve the problems.
The invention is realized by the following technical scheme:
a periodic test device for an out-of-stack nuclear instrument system comprises a test device connected with the out-of-stack nuclear instrument system, wherein the test device reads output data of the out-of-stack nuclear instrument, and is used for generating a signal simulating a neutron detector and sending the signal to the out-of-stack nuclear instrument system;
the device comprises a configuration unit and a signal source case, wherein the configuration unit and the signal source case are integrated in the device;
the configuration unit is a portable ruggedized computer, is limited in the device and is communicated with the signal source case, the signal source case provides source signals for the configuration unit, and the configuration unit processes the source signals and outputs analog signals.
Further, the configuration unit outputs current signals of three types of analog neutron detectors, wherein the current signals of the analog neutron detectors comprise constant current, step current and exponential current.
Furthermore, the test device is connected with the out-of-stack nuclear instrument system through a cable, the cable transmits data in two directions, the test device sends a simulated neutron detector signal to the out-of-stack nuclear instrument system and receives an output signal of the out-of-stack nuclear instrument system, and the test device analyzes the output signal of the out-of-stack nuclear instrument system and outputs an analysis conclusion.
Preferably, the output range of the constant current is (1.00E-11-3E-03) A;
the accuracy is given in the following table:
preferably, the step current output by the configuration unit is: and switching and outputting the constant direct current signal with the interval less than 1ms twice, wherein the frequency of the constant direct current signal output at the last time is ten times that of the constant direct current signal output at the last time.
Preferably, the exponential current output by the device is:
wherein I0＝10-11A, t is time and can generate an exponential signal of at least 100 s;
or the exponential current output by the configuration unit is as follows:
wherein I0＝10-3A and t are time and can generate an exponential signal of at least 100 s.
A periodic test method for an out-of-stack nuclear instrument system is based on the periodic test device for the out-of-stack nuclear instrument system to perform periodic test, and functions of a neutron detector and the out-of-stack nuclear instrument system comprise the following steps:
(1) the testing device sends a control instruction to the out-of-stack nuclear instrument system, the out-of-stack nuclear instrument system controls the neutron detector according to the control instruction, the controlled neutron detector outputs a test signal to the out-of-stack instrument device, and the out-of-stack nuclear instrument system receives an output signal of the neutron detector;
(2) the testing device reads the testing signal output by the neutron detector through the out-of-pile nuclear instrument system, analyzes the output testing signal according to the type of the control command, and outputs an analysis conclusion.
Further, the control instruction comprises a high-voltage command for controlling the neutron detector, a discrimination voltage command for controlling a proportional counter in the neutron detector and an insulation resistance value acquisition command;
when the control instruction is a high-voltage command for controlling the neutron detector, the test device reads a test signal output by the neutron detector, draws a neutron detector plateau curve, automatically analyzes according to the neutron detector plateau curve, and outputs an analysis conclusion;
when the control instruction is a discrimination voltage command for controlling a proportional counter in the neutron detector, the testing device reads a test signal output by the neutron detector, draws a discrimination curve of the neutron detector, automatically analyzes according to the discrimination curve of the neutron detector, and outputs an analysis conclusion;
when the control instruction is an insulation resistance value acquisition command, the testing device reads a test signal output by the neutron detector, automatically analyzes the insulation resistance value and outputs an analysis conclusion.
A periodic test method of a nuclear instrument system outside a reactor is based on the periodic test device of the nuclear instrument system outside the reactor to carry out periodic test, and the self-checking function of the test device comprises the following steps:
(A) the testing device inputs a certain type of simulated neutron detector signal to the out-of-pile nuclear instrument system through a cable, and the out-of-pile nuclear instrument system correspondingly processes the simulated neutron detector signal according to the certain type and outputs a corresponding processing result;
(B) the testing device directly reads the output signal of the out-of-pile nuclear instrument system, automatically analyzes the output result according to a certain type of correspondence, and outputs a self-checking analysis conclusion.
A periodic test method of an out-of-stack nuclear instrument system is based on the periodic test device of the out-of-stack nuclear instrument system to carry out periodic test, and the response time of the out-of-stack nuclear instrument system comprises the following steps:
s1, inputting signals to the out-of-pile nuclear instrument system for multiple times through a cable by the test device, wherein the input signals are neutron analog detector signals of a certain type, the out-of-pile nuclear instrument system outputs output signals for processing the neutron analog detector signals to the test device, and the output signals are switching value signals;
and S2, the testing device receives the switching value signals output by the off-core instrument system for multiple times, calculates the time difference of the output signal change caused by the input signal, performs numerical analysis to output the response time of the off-core instrument system, and outputs the calculation result.
The technical indexes of the pulse signal generation of the signal source case are as follows:
repetition frequency range: 1 Hz-10 MHz;
pulse width: 500 ns;
pulse width error: less than or equal to 50 ns;
output impedance: 50 omega.
The invention has the following advantages and beneficial effects:
the invention adopts an integrated design, has compact and light structure and is convenient to carry in a nuclear power plant factory.
The device can complete all regular test items of the out-of-pile nuclear instrument system and timely find out equipment faults so that personnel can take corresponding measures to ensure the safe, stable and reliable operation of the nuclear instrument system and the safety of a nuclear power plant.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the apparatus of the present invention.
Detailed Description
Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive changes, are within the scope of the present invention.
A periodic test device for an out-of-stack nuclear instrument system is shown in figure 1 and comprises a test device connected with the out-of-stack nuclear instrument system, wherein the test device reads output data of the out-of-stack nuclear instrument system and is used for generating a signal simulating a neutron detector and sending the signal to the out-of-stack nuclear instrument system;
the device comprises a configuration unit and a signal source case, wherein the configuration unit and the signal source case are integrated in the device;
the configuration unit is a portable ruggedized computer, is limited in the device and is communicated with the signal source case, the signal source case provides source signals for the configuration unit, and the configuration unit processes the source signals and outputs analog signals.
Further, the configuration unit outputs current signals of three types of analog neutron detectors, wherein the current signals of the analog neutron detectors comprise constant current, step current and exponential current.
Furthermore, the test device is connected with the out-of-stack nuclear instrument system through a cable, the cable transmits data in two directions, the test device sends a simulated neutron detector signal to the out-of-stack nuclear instrument system and receives an output signal of the out-of-stack nuclear instrument system, and the test device analyzes the output signal of the out-of-stack nuclear instrument system and outputs an analysis conclusion.
Preferably, the output range of the constant current is (1.00E-11-3E-03) A;
the accuracy is given in the following table:
| measuring range | Accuracy of measurement |
| 1nA | ≤0.5％ |
| 10nA | ≤0.2％ |
| 100nA | ≤0.2％ |
| 1μA | ≤0.2％ |
| 10μA | ≤0.1％ |
| 100μA | ≤0.1％ |
| 1mA | ≤0.1％ |
| 10mA | ≤0.1％ |
Preferably, the step current output by the configuration unit is: and switching and outputting the constant direct current signal with the interval less than 1ms twice, wherein the frequency of the constant direct current signal output at the last time is ten times that of the constant direct current signal output at the last time.
Preferably, the exponential current output by the device is:
wherein I0＝10-11A, t is time and can generate an exponential signal of at least 100 s;
or the exponential current output by the configuration unit is as follows:
wherein I0＝10-3A and t are time and can generate an exponential signal of at least 100 s.
A periodic test method for an out-of-stack nuclear instrument system is based on the periodic test device for the out-of-stack nuclear instrument system to perform periodic test, and functions of a neutron detector and the out-of-stack nuclear instrument system comprise the following steps:
(1) the testing device sends a control instruction to the out-of-stack nuclear instrument system, the out-of-stack nuclear instrument system controls the neutron detector according to the control instruction, the controlled neutron detector outputs a test signal to the out-of-stack instrument device, and the out-of-stack nuclear instrument system receives an output signal of the neutron detector;
(2) the testing device reads the testing signal output by the neutron detector through the out-of-pile nuclear instrument system, analyzes the output testing signal according to the type of the control command, and outputs an analysis conclusion.
Further, the control instruction comprises a high-voltage command for controlling the neutron detector, a discrimination voltage command for controlling a proportional counter in the neutron detector and an insulation resistance value acquisition command;
when the control instruction is a high-voltage command for controlling the neutron detector, the test device reads a test signal output by the neutron detector, draws a neutron detector plateau curve, automatically analyzes according to the neutron detector plateau curve, and outputs an analysis conclusion;
when the control instruction is a discrimination voltage command for controlling a proportional counter in the neutron detector, the testing device reads a test signal output by the neutron detector, draws a discrimination curve of the neutron detector, automatically analyzes according to the discrimination curve of the neutron detector, and outputs an analysis conclusion;
when the control instruction is an insulation resistance value acquisition command, the testing device reads a test signal output by the neutron detector, automatically analyzes the insulation resistance value and outputs an analysis conclusion.
A periodic test method of a nuclear instrument system outside a reactor is based on the periodic test device of the nuclear instrument system outside the reactor to carry out periodic test, and the self-checking function of the test device comprises the following steps:
(A) the testing device inputs a certain type of simulated neutron detector signal to the out-of-pile nuclear instrument system through a cable, and the out-of-pile nuclear instrument system correspondingly processes the simulated neutron detector signal according to the certain type and outputs a corresponding processing result;
(B) the testing device directly reads the output signal of the out-of-pile nuclear instrument system, automatically analyzes the output result according to a certain type of correspondence, and outputs a self-checking analysis conclusion.
A periodic test method of an out-of-stack nuclear instrument system is based on the periodic test device of the out-of-stack nuclear instrument system to carry out periodic test, and the response time of the out-of-stack nuclear instrument system comprises the following steps:
s1, inputting signals to the out-of-pile nuclear instrument system for multiple times through a cable by the test device, wherein the input signals are neutron analog detector signals of a certain type, the out-of-pile nuclear instrument system outputs output signals for processing the neutron analog detector signals to the test device, and the output signals are switching value signals;
and S2, the testing device receives the switching value signals output by the off-core instrument system for multiple times, calculates the time difference of the output signal change caused by the input signal, performs numerical analysis to output the response time of the off-core instrument system, and outputs the calculation result.
The technical indexes of the pulse signal generation of the signal source case are as follows:
repetition frequency range: 1 Hz-10 MHz;
pulse width: 500 ns;
pulse width error: less than or equal to 50 ns;
output impedance: 50 omega.
The first embodiment is as follows:
in the normal operation process of the nuclear power plant, a certain pile of out-of-core instrument system measuring channel is bypassed, and the periodic test device is connected with the out-of-core instrument system measuring channel signal processing equipment through a cable. The signal source case is controlled by the reinforced notebook computer shown in fig. 1 to output an analog detector signal to the nuclear instrument system signal processing device, and the signal processing device output result is read by the reinforced notebook computer. And the reinforced notebook computer compares the read value with a set value, analyzes the reasonability of data and outputs an analysis result, wherein the signal processing equipment is part of the out-of-pile nuclear instrument system.
Example two:
in the normal operation process of a nuclear power plant, a certain pile of outer nuclear instrument system measuring channel is bypassed, a reinforced notebook computer in a periodic test device is independently used, and the reinforced notebook computer is connected with the pile of outer nuclear instrument system measuring channel signal processing equipment through a cable. The reinforced notebook computer controls the signal processing equipment to output a variable detector high-voltage signal according to a certain rule, reads the detector output signal through the signal processing equipment, draws a high-voltage-signal relation curve (namely a detector plateau curve), analyzes curve data and outputs a test result.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The periodic testing device for the out-of-stack nuclear instrument system is characterized by comprising a testing device connected with the out-of-stack nuclear instrument system, wherein the testing device reads output data of the out-of-stack nuclear instrument system and is used for generating a signal simulating a neutron detector and sending the signal to the out-of-stack nuclear instrument system;
the device comprises a configuration unit and a signal source case, wherein the configuration unit and the signal source case are integrated in the device;
the configuration unit is a portable ruggedized computer, is limited in the device and is communicated with the signal source case, the signal source case provides source signals for the configuration unit, and the configuration unit processes the source signals and outputs analog signals.
2. The periodic testing device for the nuclear instrumentation system outside the reactor as claimed in claim 1, wherein:
the configuration unit outputs current signals of three types of analog neutron detectors, and the current signals of the analog neutron detectors comprise constant current, step current and exponential current.
3. The periodic testing device for the nuclear instrumentation system outside the reactor as claimed in claim 1, wherein the testing device is connected to the nuclear instrumentation system outside the reactor through a cable, the cable transmits data bidirectionally, the testing device sends a simulated neutron detector signal to the nuclear instrumentation system outside the reactor and receives an output signal of the nuclear instrumentation system outside the reactor, and the testing device analyzes the output signal of the nuclear instrumentation system outside the reactor and outputs an analysis conclusion.
4. The periodic testing device for the nuclear instrumentation system outside the reactor as claimed in claim 2, wherein:
the output range of the constant current is (1.00E-11-3E-03) A.
5. The periodic testing device for the nuclear instrumentation system outside the reactor as claimed in claim 4, wherein:
the step current output by the configuration unit is as follows: and switching and outputting the constant direct current signal with the interval less than 1ms twice, wherein the frequency of the constant direct current signal output at the last time is ten times that of the constant direct current signal output at the last time.
6. The periodic testing device for the nuclear instrumentation system outside the reactor as claimed in claim 2, wherein:
the exponential current output by the device is as follows:
wherein I0＝10-11A and t are time;
or the exponential current output by the configuration unit is as follows:
wherein I0＝10-3A and t are time.
7. A method for periodically testing an out-of-stack nuclear instrumentation system, based on the apparatus for periodically testing an out-of-stack nuclear instrumentation system of any one of claims 1 to 6, wherein the functions of the neutron detector and the out-of-stack nuclear instrumentation system are as follows:
(1) the testing device sends a control instruction to the out-of-stack nuclear instrument system, the out-of-stack nuclear instrument system controls the neutron detector according to the control instruction, the controlled neutron detector outputs a test signal to the out-of-stack instrument device, and the out-of-stack nuclear instrument system receives an output signal of the neutron detector;
(2) the testing device reads the testing signal output by the neutron detector through the out-of-pile nuclear instrument system, analyzes the output testing signal according to the type of the control command, and outputs an analysis conclusion.
8. The method for the periodic test of the nuclear instrumentation system outside the reactor as claimed in claim 7, wherein the control command comprises a command for controlling the high voltage of the neutron detector, a command for controlling the discrimination voltage of a proportional counter tube in the neutron detector and a command for collecting the resistance value of the insulation resistor;
when the control instruction is a high-voltage command for controlling the neutron detector, the test device reads a test signal output by the neutron detector, draws a neutron detector plateau curve, automatically analyzes according to the neutron detector plateau curve, and outputs an analysis conclusion;
when the control instruction is a discrimination voltage command for controlling a proportional counter in the neutron detector, the testing device reads a test signal output by the neutron detector, draws a discrimination curve of the neutron detector, automatically analyzes according to the discrimination curve of the neutron detector, and outputs an analysis conclusion;
when the control instruction is an insulation resistance value acquisition command, the testing device reads a test signal output by the neutron detector, automatically analyzes the insulation resistance value and outputs an analysis conclusion.
9. A method for periodically testing a nuclear instrumentation system, which is based on the periodic testing device of any one of claims 1 to 6, and performs periodic testing, wherein the self-checking function of the testing device comprises the following steps:
(A) the testing device inputs a certain type of simulated neutron detector signal to the out-of-pile nuclear instrument system through a cable, and the out-of-pile nuclear instrument system correspondingly processes the simulated neutron detector signal according to the certain type and outputs a corresponding processing result;
(B) the testing device directly reads the output signal of the out-of-pile nuclear instrument system, automatically analyzes the output result according to a certain type of correspondence, and outputs a self-checking analysis conclusion.
10. A method for periodically testing a nuclear instrumentation system, based on the apparatus of any one of claims 1 to 6, wherein the response time of the nuclear instrumentation system is as follows:
s1, inputting signals to the out-of-pile nuclear instrument system for multiple times through a cable by the test device, wherein the input signals are neutron analog detector signals of a certain type, the out-of-pile nuclear instrument system outputs output signals for processing the neutron analog detector signals to the test device, and the output signals are switching value signals;
and S2, the testing device receives the switching value signals output by the off-core instrument system for multiple times, calculates the time difference of the output signal change caused by the input signal, performs numerical analysis to output the response time of the off-core instrument system, and outputs the calculation result.
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| CN113436766A (en) * | 2021-06-07 | 2021-09-24 | 中国核动力研究设计院 | Out-of-pile nuclear instrument system equipment for nuclear power plant |
| CN115482944A (en) * | 2022-10-10 | 2022-12-16 | 中国核动力研究设计院 | Signal source device and system applied to reactor protection system periodic test |
| CN115641973A (en) * | 2022-09-09 | 2023-01-24 | 中国核动力研究设计院 | Verification system and method for reactor core neutron flux measurement system |
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| CN115641973A (en) * | 2022-09-09 | 2023-01-24 | 中国核动力研究设计院 | Verification system and method for reactor core neutron flux measurement system |
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