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Lemc

LEMC™

Large Epi-Thermal Multiplicity Counter

The LEMC large epi-thermal multiplicity counter is a high-efficiency, fast-response neutron multiplicity counter engineered for high-precision, non-destructive assay of plutonium and uranium materials, including impure and mixed-oxide (MOX) scrap. With advanced epi-thermal neutron detection and high-efficiency design, the LEMC counter delivers fast, accurate results — ideal for nuclear safeguards, waste management and inventory control.

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Data Sheet

Tag Features

  • Designed for quantitative passive neutron analysis
  • High Detection Efficiency: >50% for 240Pu spontaneous fission neutrons
  • Faster Die-Away Time for Greater Measurement Accuracy: 24 μs
  • Large sample cavity accommodates items up to 40 liters, ideal for bulk materials, scrap and MOX fuel
  • Fast pre-amp electronics with greater performance
  • Low Deadtime for Faster Throughput, Higher Count Accuracy: 41 ns
  • Internal de-randomizing board for accurate, orderly data acquisition
  • Operated using JSR-15™ shift registers
  • Available with NDA 2000™ software, compatible with all Mirion neutron counters and gamma-ray systems

Description

The LEMC Large Epi-Thermal Multiplicity Counter is a high-performance neutron coincidence counter designed for measuring the multiplicity of the neutron emission from spontaneous fission and induced-fission reaction in plutonium and uranium. The LEMC system measures impure plutonium and mixed-oxide (MOX) scrap materials for safeguards and inventory control applications. Intended for the measurement of items up to 40 liters (10 gallons) in volume, the counter offers improved measurement precision through use of multiple cadmium layers and high-pressure (10 atm) 3He proportional tubes.

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