System for monitoring loosening part of nuclear reactor and coolant system

Abstract

The invention provides a system for monitoring loosening parts of a nuclear reactor and a coolant system, solving the problems of reliability, compatibility, stability and maintenance convenience and comprising an accelerometer, a charge amplifier, signal conditioning equipment, loosening part detection equipment, alarm processing equipment, sound monitor equipment, data collection equipment, a display, loosening part monitor software and the like. The system adopts a PXI bus technology so as to enable every two modules to be synchronized; a signal conditioning module adopts an FPGA programmable technology; a DSP digital technology is adopted to discriminate a loosening part event; loosening part signal length effective value floating discrimination, time delay, channel recheck combination discrimination, alarm prohibition caused by alarm channel recheck, control rod motion or coolant low pressure, and the like ensure that the system has a strong wrong alarming resistance capacity; the data collection equipment collects data to replace tape records so as to ensure the integrity of event signal records; and event signal waveform display and data storage can carry out display back and secondary analysis on signals.

Description

technical field [0001] The invention relates to a nuclear power plant reactor monitoring system, in particular to a nuclear power plant reactor and coolant system loose parts monitoring system. Background technique [0002] International standards (such as IEC 60988-1990, ASME OM-S-G-2000 (Part 12)) and national standards (GB_11807) stipulate that for reactor vessels and coolant systems in nuclear power plants, loose parts monitoring is required. [0003] There is no report on the development of nuclear power plant reactor and coolant system loose parts monitoring system and related patented technologies by other domestic units. The loose parts monitoring systems equipped in active nuclear power plants are all imported from abroad. The second phase of nuclear power, Daya Bay and Ling Ao nuclear power are O1dB-Stell in France, and Tianwan nuclear power is in Russia. [0004] The KIR loose parts monitoring system of French O1dB~Stell company represents the current level of do...

AI Technical Summary

Problems solved by technology

[0005] (1) The signal conditioning and loose parts detection equipment adopts the PCI bus, and the modules cannot be completely synchronized, which brings systematic errors to the time difference analysis of the loose parts event signal;

[0006] (2) In the detection of loose parts, only amplitude discrimination is used, which leads to poor anti-false alarm ability of the system, and false alarms often occur;

[0007] (3) Using a tape drive as an event recording and playback device, the current event signal cannot be recorded due to the start-up delay; because the tape can only record for 45 minutes at most, if the tape is not replaced in time, the next event signal will not be recorded; the signal The playback must use the tape drive with the same or similar specifications, and it can be viewed with a digital logger or an oscilloscope;

[0008] (4) The loose parts monitoring software lacks the original signal waveform display of the alarm event, so it is impossible to know whether the alarm event is a loose part event;

[0009] (5) The loose parts monitoring software lacks the storage of the original signal data of the alarm event, and it is impossible to trace and re-analyze the alarm event, and it is difficult to diagnose and analyze the alarm event

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