Features

• Designed for quantitative passive neutron multiplicity analysis
• Optimized for assay of inventory containers within shipping drum
• Performance exceeds that from most multiplicity well counters
• Accommodates 200 liter drums
• Moderate neutron detection efficiency for ²⁴⁰Pu fission neutrons: 19.4%
• Composite Die-Away Time: 80 ìs
• Fast Amptek electronics
• Dead-time: 200 ns
• Sensitivity - detection levels of <50 mg W.G. Pu
• All HDPE moderator enclosed within metallic skins
• Modular detector assemblies
• Operated using JSR-12, 2150 or JSR-14 shift registers
• Available with NDA 2000 software
• Options
  • Automation
  • Add-A-Source matrix correction
  • Alternate detector configurations
  • Drum rotator
  • Automated load/unload mechanism
  • Larger container sizes

Description

The WM3100 series of passive neutron coincidence counters, based on the successful Waste Drum Assay System (WDAS)¹, is designed to perform accurate quantitative assays on neutron emitting nuclides found in Transuranic (TRU) wastes. The WM3100 measures the plutonium content of the waste drum by detecting coincidence neutrons from the spontaneous fission of the even numbered isotopes of plutonium. The standard system configuration provides a 4ð passive neutron detection efficiency of 19% for 240Pu spontaneous fission neutron emitted with in the center of the assay cavity. The WM3100 is designed to assay 208 liter (55 gallon) drums and provide detection levels on the order of approximately 3 mg of ²⁴⁰Pu effective in a 1800 second count time.