Online alarm device of control loop power supply and verification method thereof

Abstract

The invention belongs to the field of a reactor safety instrument control system, and particularly relates to an online alarm device of a control loop power supply and a verification method thereof. The online alarm device comprises a driving control module power supply, an overcurrent protecting fuse, a voltage stabilizing diode, an arithmetic logic unit and an online alarm unit. The control module power supply, the overcurrent protecting fuse and the voltage stabilizing diode are successively connected in series. The overcurrent protecting fuse further comprises an overcurrent protecting fuse input end and an overcurrent protecting fuse output end. The arithmetic logic unit is provided with an arithmetic logic unit output end and an arithmetic logic unit input end. Two lines are respectively leaded out of the overcurrent protecting fuse input end and the overcurrent protecting fuse output end for connecting with the arithmetic logic unit input end. The arithmetic logic unit output end is serially connected with the online alarm unit.

Description

technical field [0001] The invention belongs to the field of reactor safety instrument control systems, and in particular relates to an online alarm device for a control loop power supply and a verification method thereof. Background technique [0002] The reactor safety instrumentation and control system of nuclear power plants is mainly used to achieve the safety goals of ensuring reactor subcriticality, maintaining core cooling, and avoiding or reducing the leakage of radioactive materials in case of accidents. The control loop of the safety instrument control system includes signal acquisition, signal logic processing, and valve drive control. The valve drive control part outputs 24V power supply voltage to the on-site valve from the drive control module, and receives the switch feedback signal from the valve at the same time. [0003] The drive control module outputs 24V power supply voltage to supply power to the valve stroke switch, and returns the switch feedback sig...

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Problems solved by technology

[0005] Since the DCS system adopts a centralized control method, the alarm signals are integrated into a comprehensive alarm integrated display, so that the fault point cannot be accurately located when an alarm is generated, and all circuits that can generate the comprehensive alarm can only be checked one by one, which increases maintenance work. difficulty

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