The JCC-41 is a high-performance, well-type neutron coincidence counter designed for in-plant measurement of large plutonium samples. With Monte Carlo-optimized geometry, enhanced shielding and a large sample cavity, it delivers superior efficiency, uniform response, and precision — making it ideal for both high-mass and lowlevel plutonium assay in operational environments.
The Features
- Well-type neutron coincidence counter for in-plant applications
- Uniform Axial Response: special design features (graphite end plugs, cadmium/polyethylene liner) ensure flat spatial response, reducing sensitivity to sample positioning and matrix effects
- Advanced Detector Configuration: Twenty-four 3He tubes arranged in a single optimized ring, grouped into six pre-amp channels with external LED diagnostics
- Fast pre-amp electronics with greater performance
- Large (61 x 24 cm) sample cavity accommodating a wide variety of sample types — including PuO2, MOX, fuel rods, solutions, and scrap — in a 61 × 24 cm cylindrical cavity
- Dual cadmium external shielding minimizes background and provides advanced radiation protection during operation
- High Efficiency & Precision: >22% detection efficiency and >28 cps/g 240Pu response rate enable high throughput and 2.4% precision in 1000 seconds