Nucsafe is supplying a variety of systems for monitoring vehicles and containers. These generation 3 systems include Nucsafe's advanced smart sensor technology. One to sixteen panels can be configured to create a radiation portal capable of monitoring everything from personally owned vehicles (cars) to 7 meter high systems for double stacked containers transported by straddle carriers in ports. The systems are integrated with front cameras with automatic number plate recognition and side cameras for other container markings.
Systems are available for lane widths of 3 to 15 meters. Optional traffic management systems are also available. The systems may be ordered with PVT gross gamma detectors or NaI detectors that provide radionuclide identification. The NaI detectors can also be added later with no change to the existing installation.
Neutron measurements are made using multiple He-3 detectors. Nucsafe can provide standard COTS solutions that address specific requirements including sensitivity, speed and distance to ensure the system will meet your requirements.
The systems are interfaced by Ethernet to multiple computers to provide both primary and secondary inspection locations with relevant data. Handheld radionuclide identifiers are interfaced to the system to allow alarm records to be fully integrated between the primary and secondary inspection points.
The modular design of Nucsafe’s Continuous Radiation Monitor Systems (CRMS) uses one or more radiation portal monitor (RPMs). Each RPM contains one or more neutron smart sensors of 3He gas tubes or neutron-sensitive scintillating glass fiber and one or more gamma ray smart sensors made of polyvinyl toluene (PVT) plastic scintillator or sodium iodide NaI(Tl) detectors. The neutron detectors are surrounded by additional polyethylene moderators designed with MCNP statistical format algorithms to optimize the neutron response to a given source. The gamma ray detectors are shadow-shielded with lead and/or steel to reduce their response from the side and behind the detector. The choice of detectors is typically application driven, but advantages exist for each type of gamma ray and neutron detection technology.
Nucsafe manufactures a variety of permanently installed systems for continuous unattended or attended radiation monitoring for a variety of objects ranging from luggage and packages to pedestrians to personally-owned vehicles, trucks, containers and train cars. Each of the systems has common features and functionality, but differ in the sizes and types of radiation detectors employed for neutron and gamma ray measurements.
The systems can be visible, providing a deterrent, or hidden for inconspicuous measurements. Both one-sided and two-sided systems are standard, although Nucsafe can provide systems with detectors above and below the object being measured. The sensitivity of any system is the product of its detectors’ geometric and intrinsic efficiencies, therefore systems with more detectors and larger detectors subtending a greater percentage of the solid angle provide increased sensitivity.
Nucsafe CRMS systems are full-featured and provide numerous application specific options. The systems are designed to meet a variety of national and international standards with respect to sensitivity, reliability and ruggedness. All of the systems come with options for the types and sizes of detectors employed. For example, for simple red light / green light operation to determine the presence or absence of radioactive materials. Nucsafe provides PVT plastic scintillator detectors for gamma-ray gross counting and either 3He neutron detectors or our proprietary neutron sensitive glass fibre detectors. If nuclide identification is required, sodium iodide (NaI(Tl) sensor is used for the gamma ray detector. In fact, Nucsafe was the first commercial company to offer nuclide identification in stationary monitoring systems.
Other features include vehicle profiling to determine the probable position of a threat in a container, integration of cameras to record the vehicles being measured, optical character recognition of license plates, user definable logging of data that is automated to create daily log files, over sampling of radiation data that allows measurements in vehicles traveling up at high speed, local and remote control and monitoring of the systems and a plethora of other user definable options. Nucsafe software provides the ability to view individual physical detection systems and to create virtual displays consisting of two or more physical systems. Summing data from large arrays of detectors provides enhanced sensitivity, allowing measurement of vehicles at higher speeds. |
