Optimized critical accident alarm method and system

Abstract

The invention relates to an optimized critical accident alarm method and system. The method comprises the following steps: acquiring detector data according to a preset acquisition period; accumulating the acquired data of each acquisition period to obtain an accumulated value; when the accumulated value reaches a preset value, calculating and storing an accumulated dose rate according to the accumulated value and the current accumulated time; when the preset maximum time is reached but the accumulated value does not reach the preset value, calculating and storing an accumulated dose rate according to the accumulated value and the maximum time; and comparing the accumulated dose rate with an alarm threshold, and determining whether to give an alarm or not according to a comparison result.The system comprises 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 invention are that the method carries out the data collection in a period far less than a conventional data collection period, can timely find a critical accident state and give an alarm, shortens the alarmtime under a critical accident, and enables the provided data to be more detailed and precise because of 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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