Constant value test system of reactor key process measurement parameters and test method

Abstract

The invention discloses a constant value test system of reactor key process measurement parameters and a test method. The system provided by the invention contaisn three independent and mutual-redundant channels and a maintenance computer, wherein each channel contains a conditioning unit, an I / O unit, a main control unit, a safety logic unit and a signal alarm unit. By a digital DCS system structure, the three mutual-redundant channels are respectively corresponding to three independent DCS control stations. The channels are isolated from each other and independently supply power, and complete computation and threshold comparison and output a corresponding digital signal to trigger the signal alarm unit to give an alarm command or trigger the safety logic unit to give a protection command. The invention has advantages as follows: errors of a constant value test are small; threshold setting is accurate and stable; hardware has low failure rate and good stability; due to diversity of test signal sources, frequency of disconnecting a terminal is minimized; constant value test time is shortened from previous 3 h / time to 1 h / time; and working time of maintenance personnel is saved.

Description

technical field [0001] The invention relates to the field of value-fixed test of measurement parameters of key process of reactor, in particular to a system and test method of value-fixed test of measurement parameter of key process of reactor. Background technique [0002] HFETR (High-throughput Engineering Test Reactor) key process measurement parameter fixed value test device is used to monitor the key process parameters (temperature, pressure, flow and reactor thermal power) of the HFETR primary loop, and perform parameter calculation and logic judgment of exceeding the threshold. And send the alarm control signal to the safety logic unit or the signal alarm unit. When the parameter exceeds the set HFETR safety threshold, the device sends out an alarm signal to trigger the safety logic device to drive the control rod transmission mechanism to make the HFETR shut down safely. Therefore, before HFETR is opened every time, it is necessary to conduct key process parameter f...

AI Technical Summary

Problems solved by technology

[0004] 1) Due to the large number of functional components, it is necessary to configure up to five precision signal sources and signal output detection tools during the parameter setting test, which requires a huge investment in human resources and low work efficiency;

[0005] 2) When using the signal source to input signals to the device, it is necessary to frequently remove and connect a large number of wiring on the terminal and set jumpers. The terminal is damaged greatly, and it is easy to have defects such as wrong cable connection or loose wiring when restoring the wiring;

[0006] 3) Using a multi-turn potentiometer for parameter threshold setting, the adjustment accuracy is not easy to control and the potentiometer is easily damaged;

[0007] 4) Lack of spare parts and difficult maintenance

Images