RU2249235C2 - System of automatic inspection of movement of radioactive materials - Google Patents

Abstract

FIELD: check points equipment.

SUBSTANCE: system has units having gamma-ray radiation detection units, neutron radiation detection units, presence detectors, brake-down detectors, controllers, signaling units, electric power sources, accumulator batteries and control boards. All the units are integrated into system by means of data collection server and are provided with video cameras being integrated in set by means videoservers, which are connected with data collection server by means of local network.

EFFECT: improved precision of detection and identification of nuclear radiation sources.

1 dwg

Description

The invention relates to the field of detection of radioactive nuclear materials and is intended for the detection of unauthorized transportation of such materials in hand luggage, cargo and baggage through checkpoints and checkpoints of customs and other objects of national economic purpose.

A similar device is known (see Certificate for Utility Model RU 0003832 U1), which contains gamma-ray detection units, signaling devices for the presence of objects in a controlled space, a metal detector, information processing and signaling equipment. The disadvantages of this device are its insecurity from unauthorized interference in its operation and the inability to detect radioactive materials experiencing spontaneous fission by their neutron radiation.

As a prototype, we consider a patent 2 219289, including gamma radiation detection units, neutron radiation detection units, presence sensors, tamper sensors, controllers, alarm units, power supplies, rechargeable batteries and control panels.

The disadvantage of this device is insufficiently perfect control over the movement of fissile and radioactive materials.

The objective of the invention is to remedy this drawback and improve this control.

The problem is solved due to the fact that the known devices, including gamma radiation detection units, neutron radiation detection units, presence sensors, tamper sensors, controllers, alarm units, power supplies, batteries and control panels, are integrated into a complex via a data acquisition server and additionally contain video cameras connected to the complex using video servers connected via a local network to the specified data collection server.

The drawing shows a block diagram of the proposed complex, where

1 - blocks detecting gamma radiation,

2 - blocks for detecting neutron radiation,

3 - presence sensors,

4 - controllers,

5 - monitor

6 - data collection server,

7 - video cameras,

8 - video servers,

9 - local area network,

10 - database

11 - AWP (workstation).

Let us dwell in more detail on the description of the device. The device comprises monitors 5 equipped with video cameras 7, video recording servers 8, a data collection server 6, automated workstations of operators 11.

The monitor contains gamma radiation detectors 1, neutron radiation detectors 2, object presence sensors 3, controller 4.

Monitors connect to the data acquisition server using the RS-485 bus and use the Modbus protocol to transfer data.

Camcorders connect to a video server. Video recording is controlled by alarms that form monitors.

Video servers connect to the data collection server using Ethernet 9 and use TCP / IP protocols.

The data collection server contains a database 10 of the device.

The operation of the device, which results in the registration of alarms, consists of several stages:

- if there is no object in the control zone, the monitor estimates the background radiation and calculates threshold counts for generating alarms based on this estimate, while to provide information about the object before an alarm occurs, the data collection server remembers the set number of current monitor measurements, and the video server remembers the set number of the last video frames;

- when the presence sensor is triggered, the monitor enters the detection mode and, if the account exceeds the set threshold, sets a digital alarm for the data collection server and turns on the alarm for the video server;

- upon receipt of an alarm, the data collection server generates an alarm record in the database and writes the measurements made by the monitor before and after the alarm to the database;

- when an alarm is received, the video server generates a video consisting of frames preceding the alarm and following the alarm; after the video is finished, the video server sends all the recorded frames to the data collection server;

- upon receipt of the video recording, the data collection server adds video frames to the database and associates them with the alarm record made earlier;

- Thus, information about the alarm, measurements made by the monitor during the alarm (profile of the passage of the object), and video recording of the object that caused the alarm are generated in the database.

In this case, individual measurements and video frames are synchronized with each other, which provides a more accurate localization of the radiation source.

After registering an alarm at the operator’s workplace, a corresponding message appears, according to which the operator performs the necessary actions. In order to process an alarm, the operator must perform a certain set of operations, for example: perform repeated monitoring of an object using a monitor, conduct monitoring using a hand-held device, etc. Each operator action is recorded in the database. The operator cannot make changes to the data received from the control equipment. He can add additional information to the database about the object that caused the alarm. This can be information about the object (passport data), cargo (copies of transport documents), control data with a hand-held device (dose rate, measured spectrum) and other data.

Thus, the device allows you to organize the simultaneous registration and synchronization of two data streams (data on the radiation situation and video images), which improves the quality of detection and identification of radiation sources.

Claims (1)

A complex of automated control over the movement of fissile and radioactive materials, comprising devices including gamma radiation detection units, neutron radiation detection units, presence sensors, tamper sensors, controllers, alarm units, power supply units, storage batteries and control panels, characterized in that devices are integrated into a complex through a data collection server and additionally contain video cameras integrated into a complex using video servers, soy Inonii through local network to said data collection server.