Nuclear Detection: System

GammaCam LT27 - Technology to Enhance Worker Safety

EDO's GammaCam represents a completely new dimension in assessing nuclear radiation fields by producing accurate two-dimensional images of gamma ray emitting objects. The portable system provides real-time pseudo-color gamma ray imagery superimposed on a conventional black and white video picture. Remote operation of the sensor head allows safe acquisition of gamma ray images in high radiation environments while minimizing worker exposure.

Sales and leases to both the Department of Energy (DoE) and commercial nuclear facilities demonstrate that the GammaCam is a useful tool in identifying gamma radiation sources and reducing exposure to personnel. The recorded gamma ray images can be used in multiple applications including survey management, job planning, inspection, and shielding evaluation. In addition to being a valuable ALARA tool, GammaCam improves the initial site characterization of Decontamination and Decommissioning job sites and characterization of unknown sources. By identifying the highest gamma radiation sources, the GammaCam provides valuable dose reduction information. Before and after images captured by the GammaCam are a useful tool in validating gamma radiation source elimination.

GammaCam Applications

Commercial Nuclear Power Plants

• Streamline Critical Path Survey Management
• Safe, Remote Surveys of Large Areas
• Evaluation of Shielding Requirements and Implementation
• Monitoring of Dynamic Radiological Conditions
• Cost Effective Sorting of Radioactive Waste

Homeland Security - Nuclear Material Control

• Homeland Security
  - Counter Terrorism
  - Treaty Verification
  - Security/Inspection Camera
• Emergency Responders
• Port of Call/Border Protection
• Characterize Suspect Vehicles, Containers

Decontamination and Decommissioning (Site Cleanup) - Environmental Restoration Applications

• Expedite Site Characterization Using Remote Surveys
• High Radiation Environments
• Source Term Determination in Curies
• Survey Hard to Access Areas
• Evaluate Effectiveness of Decontamination Activity

Nuclear Navy

• Safe Evaluation of Radiological Areas
• ALARA Tool to Reduce Personnel Exposure
• Clarify Complex Radiological Conditions

Public Health

• Fugitive Sources Located
• Validates DOT Guidelines
• Characterize "Mystery" Sources
• Medical safeguards
• Medical imagery
• Nuclear Medicine Control

GammaCam Model LT27 Sensor Module Specifications

Spectral Range	< 50 keV to > 1.5 MeV
Detector	High density terbium-activated scintillating glass
Sensitivity	1 µR integrated dose for Cs-137 point source and 7:1 SNR (6 µR/hr above background at sensor head)
Exposure Time	User selectable, 1 millisecond - 10 minutes, Software Summing for >10 minutes
Field of View (FOV)	25 degrees Narrow FOV Mode, 50 degrees Wide FOV Mode
Spatial Resolution	1.3 degrees Narrow FOV Mode, 2.6 degrees Wide FOV Mode
Dynamic Range	Instrument: >10E8, Single Image: >20:1
Color or B&W Video FOV	73 degrees Horizontal, 55 degrees Vertical
Temperature	Operation: 5 degrees C - 40 degrees C, Storage: -20 degrees C- 50 degrees C
Humidity	0 - 99% noncondensing
Detection Head	Weight: 45 Pounds, Size: 20 in. Length, 10 in. Width, 10 in. Height, Tripod Mountable
Processor (Optional)	Rugged Laptop Computer (IBM PC Compatible), Intel Pentium CPU, 256 Megabytes RAM (min), Active Matrix LCD Color Display, Internal Hard Drive, CD-RW
Standard Software	GammaSoft™
System Power	120 Watts, 110 - 240 VAC 50/60 Hz

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