RJ11 Series Channel-Type Vehicle Radiation Monitoring Equipment

Short Description:

The RJ11 series channel radioactive monitoring system is mainly used to monitor whether trucks, container vehicles, trains and other on-board substances contain excessive radioactive substances.

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Product Profile

The monitoring system is equipped with plastic scintillators and standard atmospheric pressure³He neutron tube (atmospheric pressure is optional), with high sensitivity, low detection limit, rapid measurement (200ms response time), can distinguish between natural and artificial, real-time automatic monitoring of channels, with speed detection, video monitoring, license plate recognition, box identification (optional) and other auxiliary functions, effectively prevent the illegal carrying and diffusion of radioactive substances, widely used in nuclear power plants, customs, airport, railway station and other radioactive monitoring and control.

Applicable Place

Medical and health care, renewable resources, metallurgy, steel, nuclear facilities, national defense, customs ports, scientific research / laboratory, hazardous waste industry, etc.

System Composition

Compulsory hardware composition of the system:
Detection assembly: plastic scintillator + low-noise photomultiplier tube
① Support structure: column and waterproof box
② Detector collimation: 5-sided ring lead-lead box
③ Alarm device: 1 set of sound and light alarm for on-site and control center
④ Center management and control system: computer, hard disk, database and analysis software 1 set
⑤ Transmission components: 1 set of TCP / IP transmission components
⑥ Position occupying and speed measurement device: to the radiation type infrared speed measurement system

Detection component: bulk sodium iodide detector + low potassium photomultiplier tube
① Probe-end analysis device: 1024-channel multichannel energy spectrum analyzer
② Support structure: column and waterproof box
③ Detector collimation: 5-sided ring lead-lead box
④ Alarm device: 1 set of sound and light alarm for on-site and control center
⑤ Center management and control system: computer, hard disk, database and analysis software 1 set
⑥ Transmission components: 1 set of TCP / IP transmission components
⑦ Position occupying and speed measurement device: to the radiation type infrared speed measurement system

System optional auxiliary device:
① Neutron detection components: 2-8 long-life neutron ratio counters
② Self-calibration device: 1 low-activity natural radioactive mineral box (non-radioactive source)
③ License plate number identification: hd night vision continuous camera, camera device 1 set
④ SMS alarm system: 1 SMS SMS alarm system set
⑤ Vehicle through management: 1 set of on-site rod lifting system
⑥ Field display system: 1 set of large-screen LED display system
⑦ Live broadcast system: 1 set of microphone + speakers
⑧ Pressure stabilization and endurance device: 1 set of UPS uninterruptible power supply
⑨ Box number identification system: high-definition scanning and storage of container box number and other information (customs selected) 1 set
⑩ Personnel protective device: protective clothing and personal dose alarm device
⑪ Site source search device: portable n, 1 detector
⑫ Dangerous goods treatment device: 1 large lead equivalent source tank, 1 extended radioactive source operating pliers
⑬ Equipment installation foundation: reinforced concrete concrete, rigid platform 1 set

Technical Feature

1. The BIN (Background Identification of Normal) background ignores the technology
The technology can quickly detect low levels of artificial radioactive material in the case of high radiation background, the detection time limit can reach 1.05 times of the background radiation level, detection time can reach 100 ms, at the same time allows the vehicle in the rapid movement of radioactive material detection, suitable for rapid detection, and can ensure that the equipment will not misalarm because of the background increase, and the vehicle caused natural radiation screening reduced compensation, increase the authenticity of the test results, improve the detection probability, especially for weak radioactive detection is very helpful

2. NORM Refunction (40K)
This function is used to determine the natural radioactive substances (40K), such as combining sodium iodide detector and MCA multienergy analyzer can accurately distinguish medical nuclides, industrial nuclides and natural radionuclides

3. Feature SIGMA statistical algorithm
Through the feature SIGMA algorithm, users can easily adjust the equipment detection sensitivity and false alarm probability relationship, can improve the sensitivity of the required detection of extremely weak radioactive sources (radioactive sources such as lost); or in the long-term online monitoring process, to receive and release freely

4. 1017Count long life3He neutron ratio counter (optional)
groovy3The He counter life is approximately 1011Count, our company uses a long life detector to count the life of up to 1017Counts, increase the use time of the detector by one million times, suitable for long-term work in online radiation monitoring and high radiation field

5. MCA multi-channel energy spectrum analyzer (optional)
The bulk sodium iodide detector equipped with multichannel energy spectrum analyzer can realize 1024 analysis of radioactive source and accurately report nuclide type in one second; "this function has outstanding contribution to the detection of sensitive nuclear materials for national defense requirements"

6. Networking (optional)
The measurement data can be uploaded to the management center through the network for unified supervision

7. Nuclide recognition function (optional)
Identify natural and human nuclides, industrial nuclides, medical nuclides, and special nuclear materials.

Natural nuclide	⁴⁰K、²²⁶Ra、²³²Th
Industrial nuclide	²⁴¹Am、¹³⁷Cs、⁶⁰Co、⁵⁷Co、²²Na、¹³³Ba、⁵⁴Mn、⁸⁸Y
Medical nuclides	¹³¹I、²⁰¹Tl、²⁰³Hg、¹⁸F、^99mTc、⁹⁹Mo、¹⁹²Ir
Special nuclear materials	⁵⁷Co、¹⁵²Eu、²³⁸U

Technical Feature

6. Networking (optional)
The measurement data can be uploaded to the management center through the network for unified supervision;

7. Nuclide recognition function (optional)
Identify natural and human nuclides, industrial nuclides, medical nuclides, and special nuclear materials.

Natural nuclide	⁴⁰K、²²⁶Ra、²³²Th
Industrial nuclide	²⁴¹Am、¹³⁷Cs、⁶⁰Co、⁵⁷Co、²²Na、¹³³Ba、⁵⁴Mn、⁸⁸Y
Medical nuclides	¹³¹I、²⁰¹Tl、²⁰³Hg、¹⁸F、^99mTc、⁹⁹Mo、¹⁹²Ir
Special nuclear materials	⁵⁷Co、¹⁵²Eu、²³⁸U

Main Technical Indicators For Nuclide Identification (Optional)

Misalarm rate
In a stable environment:
Use the space sensor, 10000 times, false alarm rate 1
Without using the occupying sensor, the false alarm rate and misidentification rate are used once within 12h

Radiation Response
Occupup 50 times, alarm 49 times

Outrange
Over 100 v S / h, a high radiation alarm is emitted and removed within 1min after the source leaves

Radiation-induced neutron alarm
No neutron alarm is triggered when the dose rate reaches 100 Sv / h

Background influence
When the background change is large enough to cause a large change in the alarm probability, the monitoring system shall issue a warning prompt

Nuclide recognition

Natural nuclide	⁴⁰K、²²⁶Ra、²³²Th
Industrial nuclide	²⁴¹Am、¹³⁷Cs、⁶⁰Co、⁵⁷Co、²²Na、¹³³Ba、⁵⁴Mn、⁸⁸Y
Medical nuclides	¹³¹I、²⁰¹Tl、²⁰³Hg、¹⁸F、^99mTc、⁹⁹Mo、¹⁹²Ir
Special nuclear materials	⁵⁷Co、¹⁵²Eu、²³⁸U
Note: Nuclide identification and neutron detection are optional, not in the standard system

The Key Technical Indexes

Project Name

Specification Information

Admito detector index

Detector type: plate plastic scintillator + low noise photomultiplier tube
Volume: 50,60,100,120,150,200, optional
Dose rate range: 1nSv / h~6Sv / h (100 l)
Energy range: 25keV~3MeV
Sensitivity: 6,240 c p s / Sv / h / L (relative)¹³⁷Cs）
Lower limit of detection: can detect radiation of 5nSv/h(0.5R/h above the background)
Self-calibration: low-activity natural radioactive mineral box (non-radioactive source)

Neutron detector indicator

Probe type: long life³He Neutron detector (1 atmospheric pressure)
Energy range: 0.025eV (hot neutron) ~14MeV
Count of life: 10¹⁷A count
Size of the effective detection area: 54mm 1160mm, 55mm 620mm is optional;
Sensitivity: 75 cps / Sv / h (relative to the other)²⁵²Cf）
Underlying count: <5cps

Online nuclide identification indicators

Detector type: bulk sodium iodide detector + low potassium quartz photomultiplier tube
Detector volume: 1,2,8,16, optional
Measuring range: 1nSv / h~8Sv / h
Energy range: 40keV~3MeV
Sensitivity: 47,500 c p s / Sv / h (relative to the other)¹³⁷Cs）
Underlay: 2,000 c p s
Lower limit of detection: can detect radiation of 5nSv/h(0.5R/h above the background)

System detection sensitivity

Underlying: Gamma reference background of 10u R / h, neutron background of not greater than 5cps (system count rate)
False positives rate: 0.1%
Source distance: the radioactive source is 2.5 meters away from the detection surface
Source shielding: Gamma source unshielded, neutron source unslow, that is, using the naked source test
Source movement speed: 8 km/h
Source activity accuracy: ± 20%
Under the above conditions that can detect the radioactive substances of the activity or quality listed in the following table, the alarm probability within 95% confidence should be 90%:

Isotopic, or the SNM	¹³⁷Cs	⁶⁰Co	²⁴¹Am	²⁵²Cf	enriched uranium ASTM	plutonium (ASTM)γ	plutonium (ASTM)n
Activity or quality	0.6 MBq	0.15MBq	17MBq	20000/s	1000g	10g	200g

Support structure indicators

Level of protection: IP65
Column size: 150mm 150mm 5mm square steel column
Surface treatment process: overall plastic spraying, chrysanthemum grain
Collimator lead equivalent: 510mm lead antimony alloy + 52mm stainless steel wrapped
Total height after installation: 4.92 m

Central control and management system indicators

Computer: i5 above Lenovo brand computer
Computer system: WIN7
Hard drive: 500G
Data storage time: 10 years

Software indicators

Report form: Generate excel spreadsheet permanently; distinguish color display for different alarm types;
Report content: The system will automatically generate the test report, including the vehicle entry channel time, time of exit time, license plate number, container number, radiation level, alarm level, alarm type, alarm level, passing speed, background radiation level, alarm threshold, sensitive nuclear material and other information
Count display mode: digital display combined with real-time waveform display
Field control: allow authorized personnel to enter conclusions on each inspection result
Database: The user can make keyword queries
Administrative permission: the authorized account can enter the background expert mode

Systemic indicators

System sensitivity consistency: 40% change in sensitivity in the height direction of the monitoring area
NORM rejection function: identifying natural radionuclides in cargo (⁴⁰K) the function of
n. Detection probability: greater than or equal to 99.9%
n. False positives rate: less than or equal to 0.1 ‰ (1 in 10,000)
Height: 0.1m~4.8m
Monitoring area width: 4m~5.5m
Speed monitoring method: double-sided infrared reaction shot
Allowed passing speed: 8 km/h ~ 20 km/h
Electronic lever: lever lifting time is less than or equal to 6 seconds, lever can be manually lifted after power off (optional)
Video surveillance: an HD night vision camera
SMS alarm system: full netcom, customer self-provided SIM card
One-time box number system identification rate: greater than or equal to 95%
One-time pass license plate recognition rate: greater than or equal to 95%
Warning decibel: 90~120db; control center 65~90db
Adjustment of alarm threshold and false alarm rate: Key value through SIGMA
Data transmission mode: wired TCP / IP mode
Vehicle overspeed alarm: with the vehicle overspeed alarm function and provide information display, the alarm speed can be set
Radiation source positioning function: the system automatically indicates the location in the compartment of the radioactive source
Large field screen led screen size: 0.5m×1.2m (optional)
Live broadcast system: 120db (optional)
Power-off endurance: The monitoring terminal endurance time is greater than 48 hours (optional)
The equipment meets the requirements of the national standard "Radioactive Materials and Special Nuclear Material Monitoring System" GBT24246-2009 for the portal vehicle monitoring system and the neutron detection efficiency
It meets the requirements of the neutron and detection efficiency of the portal vehicle monitoring system in the Technical and Functional Specifications for Border Monitoring Equipment and IAEA-TECDOC-1312 released in IAEA 2006