Portable nuclear instrument system signal detection and fault positioning device

Abstract

The invention provides a portable nuclear instrument system signal detection and fault positioning device. The device comprises a shell, a power supply board, a main control board, a weak current signal acquisition board, a source range pulse signal acquisition board, a high voltage output board and a liquid crystal display board, wherein an accommodating cavity is formed in the shell; the power supply board, the main control board, the weak current signal acquisition board, the source range pulse signal acquisition board and the high voltage output board are all placed in the accommodating cavity; the liquid crystal display panel is fixed on the surface of the shell, and the power panel, the weak current signal acquisition board, the source range pulse signal acquisition board, the high voltage output board and the liquid crystal display panel are all electrically connected with the main control board; the weak current signal acquisition board, the source range pulse signal acquisition board and the high voltage output board are provided with corresponding HN terminals; and the HN terminal is arranged on the surface of the shell. According to the invention, when an abnormal signaloccurs, a fault section can be troubleshot through a segmentation test function of the device, so that troubleshooting and positioning are realized.

Description

technical field [0001] The invention relates to the detection field, in particular to a portable nuclear instrument system signal detection and fault location device. Background technique [0002] Nuclear power plants use nuclear instrumentation systems for online power monitoring. The signals of nuclear instrumentation systems are weak, and are easily affected by the quality of the measurement circuit installation or external interference. In the actual project construction process, the source range neutron count rate flash anomalies of the nuclear instrumentation system have occurred many times. In the past investigations of the cause of the abnormal count rate flashing problem of the source range of the nuclear instrument system, in order to determine the faulty section, the signal cable needs to be untied section by section, but the source range signal and the high voltage are the same cable, and the cable cannot be disconnected. A signal was observed on the cabinet. M...

AI Technical Summary

Problems solved by technology

In the past investigations of the source range abnormal count rate flashing problem of the nuclear instrument system, in order to determine the faulty section, the signal cable needs to be untied section by section, but the source range signal and the high voltage are the same cable, and the cables cannot be untied. Signals observed on the cabinet

And the fault phenomenon is flashing, it may take a long time of continuous monitoring to catch the fault

Moreover, due to the lack of suitable fault location tools, it is difficult to find and locate the root cause of the fault on site. A lot of manpower and material resources are spent in the actual fault handling process. In the end, the most probable cause can only be obtained through the analysis of the fault phenomenon.

[0003] Individual suppliers of nuclear instrumentation systems in domestic nuclear power plants provide simple test devices that can be used to collect source-range pulse signals, but the functions are relatively simple, and the current measurement functions of intermediate range and power range cannot be realized, and the measurement data cannot be stored for a long time. and use effects are very limited, inconvenient for the field

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