A nuclear critical alarm system and its alarm method

Abstract

The invention discloses a nuclear critical alarm system and an alarm method thereof. The system includes a radiation monitoring host, a plurality of composite detectors and an alarm flute. The radiation monitoring host includes a detector signal acquisition and processing unit, a nuclear critical alarm logic unit, and a display processing unit. unit, power supply unit and interface unit, the composite detector is connected to the input end of the detector signal acquisition processing unit and the nuclear critical alarm logic unit, and the alarm whistle is connected to the output end of the nuclear critical alarm logic unit; the composite detector includes signal processing Module, first GM detector, second GM detector, plastic scintillation detector, source detection LED, first high voltage module and second high voltage module. The system of the present invention is simple in structure, reasonable in design, easy to realize, can be effectively applied in the monitoring of gamma nuclear criticality, has a wide detection range and extremely fast response speed, and can improve the stability and reliability of the nuclear criticality alarm system in combination with the alarm method. The effect is good, and it is convenient to popularize and use.

Description

technical field [0001] The invention belongs to the technical field of nuclear radiation detection, and in particular relates to a nuclear criticality alarm system and an alarm method thereof. Background technique [0002] The nuclear criticality alarm system can monitor the gamma ray or neutron radiation dose of nuclear fuel production, processing, storage, and reprocessing plants or test research reactors to reflect the radiation transients in these places and prevent critical accidents caused by fuel accumulation. Damage to fuel elements or release of radioactivity. When critical accidents occur in these places, sound and light alarms can be issued accurately and in time to prompt personnel to evacuate and take emergency measures. [0003] According to different places of use and monitoring principles, nuclear criticality alarm systems are divided into two types: nuclear gamma criticality alarms and neutron criticality alarms. The nuclear criticality alarm system genera...

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Problems solved by technology

[0006] In the prior art, the detector of the BH3208 nuclear criticality alarm and measurement system of China Nuclear Control System Engineering Co., Ltd. uses three GM tubes, and its measurement range is 0.1μGy / h to 25Gy / h, and theoretically cannot identify the radiation transient of 1ms , can not meet the measurement requirements of critical accident alarm

Moreover, this product has inherent defects in physical methods. The three detectors are all GM tubes. When a critical accident occurs, the GM tube will be saturated due to the instantaneous increase in the measurement dose. At this time, the pulse signal output of the GM tube will be greatly reduced. , cannot meet the function of critical alarm

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