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STATE OF ART INSTRUMENTATION FROM AN INNOVATIVE COMPANY
CONTAINER / TRUCK MONITORING SYSTEM (FOR RADIOACTIVE CONTAMINATION) [TYPE: TR1021 / TR1025 / TR1030]
Technical Data

CONTAINER/TRUCK MONITORING SYSTEM Type: TR1030/TR1039 manufactured by NUCLEONIX has been primarily designed to detect Radioactive Contamination (RaC) – Gamma Radiation, present in a moving vehicle loaded with steel scrap metal finished goods. Hence, this system finds use in steel industry, forging units and in large foundries to monitor incoming scrap and also to monitor outgoing finished products at entry and exit gates for radioactive contamination.

This system could also be used to detect clandestine movement of Radioactive and special nuclear material across the borders, sea ports, airports, nuclear and other high security installations in trucks and containers.

Container / Truck Monitoring System is offered in 2 configurations for steel industry.

  • Truck monitoring version - TR1030
  • Container/Truck/Small Vehicle monitoring version – TR1039

The gamma detection system essentially comprises of 2 large volume of plastic scintillation detectors housed inside each detector pillar. Each PVT detector has an active volume of 22400cc. Each gamma detector is provided with necessary lead shielding to minimize the background and to enhance the MDA of the system. .

The gamma detection assembly is housed inside a low Z material based detector pillar. Two such detector pillars are placed along either side of the passage from where the vehicle is going to pass. This installed monitor automatically detects the presence of radioactive material being transported in vehicles if it exceeds preset levels. The monitoring system does this by measuring the radiation level taken while vehicle occupies detection area and comparing this level to the background radiation level that is measured and updated while detection area is unoccupied.

The background radiation levels are continuously measured and automatic adjustment of alarm thresholds enables a constant statistical false alarm rate to be maintained during the system use. Occupancy sensors are used to detect the presence or absence of vehicles as it passes through the monitor to know when to monitor the background and when to monitor the vehicle.

The sensitivity of detectors is dependent upon the closeness of the detector and source as well as the slowness with which they pass each other. For large trucks and vehicles, large volume detector pillars are recommended and maximum distance between pillar is 3.5m. Additionally barriers not obstructing the view of the monitor are to be installed to protect monitor from being damaged by vehicles.

The detector needs to be placed where speed of the vehicle is controlled and reduced. The speed of the vehicle should be less than 4 kmph and the vehicle should not stop while passing through the monitor.

The performance and effectiveness of the installed instrument is strongly dependent on its ability to measure radiation intensity over the search area of interest. As such based on this requirement detector volumes, geometry and dimensions have been adopted.

Alarm indications and displays are available locally and are clearly visible to the officers manning the inspection point and are also available remotely at the central monitoring PC.

This system could be installed at various entry/exit points of the installation and can be under the supervision of security officer.
Features

  • Uses 2 / 4 no. of large volume plastic scintillation detectors.
  • Uses State-of-Art SBC and FPGA Technology in the dataacquisition unit.
  • Ethernet port has been provided for connectivity to plantwide LAN / PC.
  • Automatic / manual mode of vehicle scan supported.
  • Designed to meet ANSI N42.35 specification.
Specifications

(A) GAMMA DETECTION SECTION
Detectors Type: High sensitivity PVT detectors coupled to PMT detector
No. of detectors per pillar: 1. Detector / pillar for TR1021
2. Detector / pillar for TR1025 / TR1030
Volume of each detector : 18000cc
Dimensions of each detector: 1200 x 380 x 40mm
Energy range: 30 KeV to 5 MeV
Sensitivity of each detector: 400 CPS/mR/h (Approx)
Shielding : Suitable thickness lead shielding is provided on all sides of detector except the measuring face to suppress background radiation and to enhance MDA.
High voltage and front-end electronics: High voltage and front-end electronics are all housed together in each of the detector pillar.

(B) RADIATION DETECTION PILLAR :
(i) Each radiation detection pillar comprising of 1/2 numbers of 18000cc large volume plastic scintillation detector along with lead shielding of suitable thickness form part of the gamma detection system (As described in section A)
ii. No. of detector pillars persystem: 2
iii. Distance seperation between detector pillars: 4 - 6m
iv. Height of detector pillar: 3.6 mtrs.

(C) MEASUREMENT & ALARM UNIT:
This unit comprising of advanced electronic circuits with embedded code built-in to receive data from the gamma detector assembly and correct for background levels and generate audio/visual alarms in the event counts due to vehicle monitoring exceed the preset levels set.
Alarm data is automatically transferred at the end of monitoring to the central PC along with the photograph of the vehicle for further investigation by the duty personnel.

Background Updation: Automatic backgrund measurement by sensing the detection area is unoccupied by using occupancy sensors.

Alarm Setting Adjustment: Automatically adjusted based on the current background level.

No. of monitoring channels: 2 for TR1021,
4 for TR1025 / TR1030

Display: 20 x 4 LCD display

User Interface: Front panel keypad (password protected) or through PC

Measurement Unit: CPS

Measurement Range: 0 to 99999 CPS

Alarm Range: 0 to 99999 CPS

Occupancy Sensing: Using IR/proximity sensors to detect vehicle presence.

Detection Area & Performance criteria:
Vertical : 0 to 3.6 mtrs.
Horizontal : 0 to 6m (Parallel to the direction of movement)
Speed of Vehicle : 0-8 Km/h

Audio/ Visual Alarms: Hooter and sounder have been provided for the purpose of generation of audio/visual alarms.

Vehicle Identification (optional): Images /Photographs of all the vehicles scanned for radioactivity are captured automatically by a camera and stored along with the corresponding readings.

PC connectivity : Ethernet port has been provided for PC connectivity.

(D) COMPUTER SOFTWARE & PC CONFIGURATION:
The data acquisition and control application software running on the host PC with a WINDOWS XP OS will communicate with the processing electronics through Ethernet port. This software facilitates remote configuration of paramters, live acquisition of data and analysis of profile for localization of any contamination.
The software is extremely flexible allowing the user to easily configure the system general operations like adjustment of detector parameters and accessing of database of all the individual vehicle scans. The software is so designed that it does not require the duty personnel to understand physics to operate the equipment.

PC Configuration : Standard PIV configuration with WINDOWS XP/2000 operating system (PC not within scope of supply).

System operating conditions :
Analog output :
0-5 volts for full range
Contact output : Potential free contact output provided for detected contamination for gate control
Power supply : 230V AC =/-10%
Temperature : 0 60o C
Humidity : upto 95% RH
Environment Protection : IP-67

Performance specifications & detection capability :
The truck monitoring system manufactured by Nucleonix will detect reliably very low levels of contamination which may be present in the vehicles carrying verity of scrap material. This system will reliably detect any contamination producing an exposure rate of 10mR/hr or 0.1mSv/hr a point source placed on the moving vehicle traveling at a speed of about 8 kmph. Detection capability will increase with decrease in speed.

Minimum Detectable Activity : MDA is computed @1 sec counting time from when the following sources are kept @ 1 meter distance from the middle of detector assembly.

Source MDA
Cs-137
Co-60
Ba-133
90 k Bq
60 k Bq
90 k Bq

TRUCK / CONTAINER MONITORING SYSTEM

Data acquisition and alarm unit

Vehicle with scrap metal at the PVT detector pillars under inspection

 

container with scrap metal


Note : Two such detector pillars are installed on both sides of the path way for the trucks carrying scrap metal or container with scrap metal.

SOFTWARE SPECIFICATIONS :

SYSTEM REQUIREMENTS:

PC (Minimum configuration): Intel i3 CPU or better, 2 GB RAM, 160 GB HDD.
OS: Windows 7. (Windows Vista / XP is not supported)
Antivirus: Norton / Quickheal / Kaspersky
Internet connectivity & Teamviewer software: For remote trouble-shooting COM port / USB-Serial convertor: For connecting Electronic Unit to PC.

INSTALLATION:
To install the software, execute TMS.bat in the installation CD.
Click through the options, until  you  get the message that installation is completed successfully.
In case of any errors, please take a screenshot of the error message and email to Nucleonix Customer Support.

CALIBRATION:
After installation of the system, it is calibrated by Nucleonix Engineer by generating Profiles for   trucks of various Models, Makes, Lengths and Heights. The data related to trucks are stored in a Calibration file. For every acquisition, TMS Software shows the available calibrated Truck profiles &  asks the User to select the Truck profile. This data is used in reports to arrive at a logical conclusion on Contamination. Details  are given in Appendix A. Re-Calibration is required every 1 year.

MAKING CONNECTIONS AND IDENTIFYING COM PORT:
Make the hardware connections as per the Hardware user manual.  Connect the Serial cable from TMS Electronic Unit to PC COM port. In case PC does not have a COM port, connect it to USB-Serial convertor. USB-Serial convertor acts as an equivalent of COM port. The drivers for USB-Serial convertor must be installed before it can be used.

After making connections, the COM port number must be identified. For this, Right click on ‘My computer’ icon on Desktop. Select Properties -> Device Manager -> Ports. You will find the COM port number. For eg. If you find ‘COM3’, it means that COM port number is 3.

EXECUTING THE APPLICATION:
Click on Start -> Programs –> Nucleonix Systems -> TMS or Double click TMS icon on Desktop to run the application. A login window appears as below.

lower part of the screen


Enter “admin” as Username, “Nucleonix” as password and click on Login button. This password can be changed to User’s choice, using the controls on lower part of the screen.

SOFTWARE OPERATION AND FEATURES:
The very first time the application is executed, the below message appears.

COM Port Number

This appears as COM port number is not yet set. Click on Ok button.

Config Menu

Setting the COM Port
Now select Config menu and click on ‘Set COM port’. In the window that pops up, enter the COM port number and click Ok. The application is terminated for the new settings to take effect. Now ReRun the application.

Main Screen of Truck Monitoring System

Let us now explore the other options in Config menu.

Setting the Counting Time
Clicking on ‘Counting Time’ will open a window, where we can set the counting time per reading. It is set to 1000 mSec by default. It is found to be optimum for Truck/Container monitoring application and need not be changed.

Setting IR Sensor Mode
The system has 2 sets of IR sensors that detect the vehicle presence and Start / Stop the Acquisition automatically. The IR sensors are physically placed right next to the detector frame on both sides. They are mounted at a suitable height in such a way that they do not see any gaps in trucks. Acquisition starts when both IR sensors detect the presence of a vehicle, that is, when front part of vehicle fully covers the detector width. The acquisition stops again when rear of the vehicle passes the first IR sensor.
By default, IR Sensor Mode is set to ‘Auto’ meaning that vehicle is detected automatically.
In certain cases, trucks have gaps between driver’s compartment and container. In such cases, ‘Auto’ mode will not work. In such cases, ‘Manual – Button’ mode must be selected. In this case, acquisition must be manually started using ‘Acquire Truck Data’ and stopped using ‘Stop Truck Data Acq’ buttons.


Vehicle Profile Selection
Vehicle profile can be selected from available profiles in Calibration file. 2 modes are available – Auto & Manual. Selecting ‘Manual’ mode will prompt the User to select Truck profile just after acquisition. The selected Truck profile will be the basis for detection of contamination.In certain cases where unmanned operation is required, ‘Auto’ mode can be selected. In this case, we fix the Truck profile to a certain make & model that is the closest match to the vehicle being scanned in terms of dimensions and shape. However, this will not be as accurate as ‘Manual’ mode.

Turning the Alarm on Panel ON/OFF
Alarm indications on Panel can be turned OFF if required. In such cases, indication is provided only on software screen.

Acquire Menu
Click on Acquire -> Start to start the acquisition of Background data. The screen will look like below.

Acquisition of Background data

Notice that there are 2 Graphical windows – one on top is for plotting the Background (BG) spectra and the other for plotting data from Truck. The data from various detectors are indicated in different colours and Sum data is indicated in pink. On top, ‘System health’ grid is shown. There is an indicator – RED / GREEN corresponding to each major component of the system. Failure of any of them turns the corresponding cell RED. System Health checks are performed during IDLE mode. The cells indicate the statuses of:
SBC – Single Board Computer, LV1 & LV2 – Low Voltage supply 1&2, IR1 & IR2 - IR Sensor status 1&2, Dx_Stat – Detector Status – Working or failed, Dx_HV – Detector HV status, Dx_Alrm – Detector Alarm status.

Apart from this, on the right, there is a Grid that shows average background data. There is another grid on bottom right that shows Truck data like Vehicle direction, whether vehicle is detected or not, Acquisition mode, Time out state and vehicle speed.

The system will be ready to acquire the Truck data once it generates 200 data points for Background.
The indication on Truck Monitoring System Electronic Unit (Panel) turns to GREEN and it reads “INSTRUMENT READY TO SCAN VEHICLE”.

Checking Contamination in Trucks
Acquisition of Truck data will start & stop automatically in ‘AUTO’ IR Sensor Mode, as soon as vehicle crosses both the IR sensors. In manual mode, “Acquire Truck Data” button must be pressed to start and “Stop Truck Data acq” to stop acquisition.

Checking Contamination in Trucks

Notice the spectra in 2nd Graphical window that corresponds to Truck data.
The Truck must be allowed to pass between the detectors as slowly as practically possible with a maximum speed less than 2 Km/hr (0.5m/s). Vehicle speed is reported in the bottom right Grid as well as in the report. The slower the truck speed, the better are the chances of detecting radioactive contamination.Once the acquisition is completed, analysis of data is performed based on the selected Truck profile and report is generated.

In cases of Contamination, Audio and Visual alarms are generated on Panel & software. The Panel LCD turns RED with “Vehicle Contaminated” message. The below message appears on PC. Once the User acknowledges, report is shown on the screen. It will be named as “Latest Report_Date_Time” by default and can be renamed & saved as required. The system will be ready to scan the next truck.

TMS

Report Menu
Clicking on Report Menu will show up previously saved reports. They can be selected for viewing, editing & printing.

Interpretation of Reports
Given below is a sample report for a truck carrying steel scrap which is contaminated.
Notice the Alarm Status row, which shows that data from detectors D1, D2, D3, D4, ‘Avg of all detectors’, ‘Sum of all detectors’ - is contaminated.
Notice the % Fall row, which shows that there is an increase of 3.75% in average readings from all detectors for this truck. This again implies that there is contamination. Now notice the Spectrum data Section - ‘Sum’ column. There are several continuous readings which have crossed statistical limits of 3 Sigma (indicated in RED), which again suggests Contamination. Look at the Statistical Observations section. The Sum row shows that ‘Total Events Score’ and ‘Events in Sequence Score’ are both high, which indicates contamination. (Event is the case when current data value exceeded Sigma or 2 Sigma or 3 Sigma.

Interpretation of Reports

Let us now analyze another report shown below, which has much lower contamination:
Notice the Alarm Status row, which shows that data from detectors D1, D2, D3, D4, ‘Avg of all detectors’, ‘Sum of all detectors’ - is contaminated. Notice the % Fall row, which shows that there is an increase of 1.45% in average readings from all detectors for this truck. This again implies that there is contamination. Now notice the Spectrum data Section - ‘Sum’ column. There are 4 continuous readings which have crossed statistical limits of Sigma (indicated in GREEN) & 2 Sigma (ORANGE), which again suggests Contamination. Look at the Statistical Observations section. The Sum row shows that ‘Total Events Score’ and ‘Events in Sequence Score’ are both high, which indicates contamination. (Event is the case when current data value exceeded Sigma or 2 Sigma or 3 Sigma).

TMS Software User manual

Help Menu

Clicking on this command this file is opened. In case there are any upgrades to the software, ask Nucleonix for the latest version of ‘TMS Software User manual’. Copy it to the same folder as TMS application.

Maintenance and Customer Support

Periodic functional checks of system must be performed with Check source as frequently as possible, as per procedure given in Appendix B. This can be done by Customer’s trained employees. Apart from this, PC must be kept free from Virus and backed up by UPS power.
Calibration must be performed every 1 year. You may contact us 1 month prior to completion of 1 year. Customer must enter into Annual Maintenance Contract after Warranty. This will entitle them for preventive maintenance checks, software upgrades, Re-Calibration, etc.
In case of any queries or issues with the software, you may contact us by email / phone / letter / fax. Details are given below:

Customer Support Department

Nucleonix Systems Pvt Ltd
Plot 162 A&B, IDA, Phase-2, Cherlapally,
and Hyderabad, INDIA.  Pin: 5000051.
Ph: +91-40-27263701, 7331104481 / 82, Fax: +91-40-27262146
Email: info@nucleonix.com,  Web: www.nucleonix.com

 

Plot No.162 A & B, Phase-II, IDA, Cherlapally, Hyderabad-500051 India Phone: +91-7207034546, +91-7331104481, 7331104482, Fax : 040-29706486.
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