Critical alarm device and system

A technology of alarm device and critical accident, which is applied in the direction of scintillation detector measurement, etc., can solve problems such as limited range, critical alarm device does not alarm, over-range counting is blocked, etc.

Active Publication Date: 2020-01-17
RATECTION CO LTD
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Problems solved by technology

However, due to the limited range of the above-mentioned gamma dose rate detector, when a critical accident occurs, the over-range counting "blocking" phenomenon is prone to occur, resulting in the critical alarm device not alarming
At the same time, the increase of the gamma dose rate in the monitoring site is not the only characteristic of critical accidents, and the use of gamma dose rate alarms can easily lead to false alarms
In addition, the 3He or BF3 detectors used in the commonly used neutron critical alarm devices are also prone to over-range counting "blocking" phenomenon, resulting in the critical alarm device not alarming
Therefore, also there is above-mentioned defect in traditional critical warning device

Method used

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Embodiment Construction

[0035] In order to better understand the purpose, technical solution and technical effect of the present invention, the present invention will be further explained below in conjunction with the accompanying drawings and embodiments. At the same time, it is stated that the embodiments described below are only used to explain the present invention, and are not intended to limit the present invention.

[0036] An embodiment of the present invention provides a critical alarm device.

[0037] figure 1 It is a block diagram of a critical alarm device module in an embodiment, such as figure 1 As shown, a critical alarm device in one embodiment includes a module 100, a module 101 and a module 102:

[0038] The neutron detection unit 100 is used to detect the number of critical accidental fission neutrons and obtain neutron detection data;

[0039] Alarm unit 101, configured to send an alarm signal;

[0040] The lower computer 102 is used to compare the neutron detection data with ...

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Abstract

The invention relates to a critical alarm device and system. A neutron detection unit detects the number of fission neutrons of a critical accident to obtain neutron detection data, and a lower computer compares the neutron detection data with a set alarm threshold and drives an alarm unit to send an alarm signal when the neutron detection data is greater than or equal to the set alarm threshold.Therefore, the situation that a critical alarm cannot be sent in time due to the fact that a detector exceeds the range under a high dose rate is avoided, and the accuracy and safety of the critical alarm are improved.

Description

technical field [0001] The invention relates to the field of nuclear technology, in particular to a critical alarm device and system. Background technique [0002] Nuclear criticality refers to a self-sustaining chain reaction of fissile substances whose mass, concentration or volume reaches critical conditions. In the process of production, processing, application, storage and transportation of fissile radioactive substances, there are potential dangers of nuclear criticality accidents due to human error, equipment accidents or external events. Although the probability of such an accident is low, once it occurs, the exposure hazards to the workers at the accident site will be extremely serious, and the half-lethal dose of acute whole-body high-dose exposure to personnel is about 3-5Gy. Since 1945, there have been more than 60 criticality accidents, resulting in the death of at least 21 people from exposure to large doses. [0003] When a critical accident occurs, the dose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T3/06
CPCG01T3/06
Inventor 钟华强
Owner RATECTION CO LTD
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