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Shielding Boronated Polyethylene (BPE)

Boronated Polyethylene is the industry-standard, lightweight, composite material of choice for effective thermal neutron shielding and moderation.
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  • BP-001

  • ABOSN

Boronated Polyethylene is the industry-standard, lightweight, composite material of choice for effective thermal neutron shielding and moderation. Its versatility, ease of use, and cost-performance balance make it indispensable in nuclear technology, medicine, and research. Its performance is always optimized when the boron loading and material form are carefully selected for the specific neutron spectrum and application requirements.


  • Boron Loading: Typically ranges from 1% to 30% by weight of boron carbide. Higher loading increases neutron absorption but can reduce mechanical flexibility.

    • Standard Grade: ~5% B₄C (good balance of properties).

    • High-Performance Grade: ~15-30% B₄C (for maximum absorption in thin profiles).

  • Density: Usually between 0.95 - 1.1 g/cm³.

  • Form Factor: Sheets (common thickness: 1/4", 1/2", 1", 2"), bricks, custom-molded shapes.

  • Color: Typically gray or black due to the boron carbide filler.


Key Properties & Advantages

  • Dual-Function Shielding: Combines the moderating power of hydrogen (from PE) with the high absorption cross-section of boron-10.

  • Lightweight: Much lighter than traditional shielding materials like concrete or lead for equivalent neutron shielding effectiveness.

  • Formable & Flexible: Can be manufactured into sheets, bricks, slabs, custom shapes, and even flexible rolls (depending on boron loading). Easy to machine, cut, and install.

  • Reduced Induced Radioactivity: By absorbing neutrons promptly, it minimizes the activation of surrounding materials and structures.

  • Lower Secondary Gamma Production: Compared to some metals (e.g., cadmium), the boron capture reaction produces less penetrating secondary gamma radiation, though some low-energy gammas are still emitted.

  • Cost-Effective: More economical than many metal-based neutron shields.

Common Applications

Boronated PE is used wherever effective, lightweight neutron shielding is required:

  1. Nuclear Reactors & Research Facilities:

    • Shields for reactor pools, beam ports, and experimental setups.

    • Temporary enclosures for maintenance.

    • Lining for transportation and storage casks for spent nuclear fuel.

  2. Medical & Industrial Applications:

    • Shielding around radiotherapy linear accelerators (linacs) that produce neutrons.

    • Shielding for BNCT (Boron Neutron Capture Therapy) facilities.

    • Around industrial radiography sources and D-T neutron generators.

  3. Nuclear Transport & Storage:

    • Liners in Type B packages for transporting radioactive materials.

    • Criticality control in storage racks for nuclear fuel.

  4. Military & Homeland Security:

    • Shielding for radiation detection systems.

    • In containers for deployed neutron-emitting sources.


Any inquiry, feel free to contact us, Email: wendy@abosn.com


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