An optimized critical accident alarm method and system

Abstract

The invention relates to an optimized critical accident alarm method and system. The method includes: collecting detector data according to a preset collection period; accumulating the collected data in each collection period to obtain an accumulated value; when the accumulated value reaches the preset value , calculate and store the accumulated dose rate according to the accumulated value and the current accumulated time; when the preset maximum time is reached but the accumulated value fails to reach the preset value, calculate and store the accumulated dose rate according to the accumulated value and the maximum time; compare the accumulated dose rate and the alarm threshold, and decide whether to alarm according to the comparison result. The system includes: a data acquisition module, a data accumulation module, a first data calculation module, a second data calculation module and an alarm module. The beneficial effects of the present invention are as follows: the present invention adopts a data collection period much shorter than that of the conventional one for data collection, can detect critical accident states in time and give an alarm, shortens the alarm time under critical accidents, and provides more detailed and accurate data due to the short collection period .

Description

technical field [0001] The invention belongs to the field of nuclear safety, and in particular relates to an optimized critical accident alarm method and system. Background technique [0002] Nuclear criticality accidents refer to energy and radioactive material release events caused by self-sustaining or divergent neutron chain reactions of fissile substances, and generally refer to prompt supercritical accidents (criticality accidents mentioned later refer to prompt supercritical accident). Although a nuclear criticality accident will not instantly release most of the fission energy of nuclear materials like an atomic bomb explosion, it will still produce a large amount of prompt neutrons and gamma rays when the accident occurs, causing overdose to nearby workers radiation, and even death. [0003] The national standard "GB15146.9-94 Performance and Inspection Requirements for Nuclear Criticality Safety Nuclear Criticality Accident Detection and Alarm System for Fissile ...

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Problems solved by technology

[0005] However, the original criticality alarm system generally has the following problems. The data storage of the original criticality alarm system is generally stored in a cycle of 1 second or longer, and the shortest duration of criticality may only be a few milliseconds or tens of milliseconds. Therefore, at this time The advanced alarm system cannot reproduce and invert the accident process, so it cannot provide detailed and reliable data support for the judgment of the size of the accident after the accident

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