Borated UHMWPE Neutron Shielding Round cover plate is a large circular radiation shielding component manufactured from hydrogen-rich ultra-high-molecular-weight polyethylene with uniformly dispersed boron-containing material.
The UHMWPE matrix helps slow fast neutrons, while the boron-containing component helps absorb thermalized neutrons. The round plate is suitable for neutron source containers, shielding access openings, equipment ports, nuclear research facilities and removable radiation protection covers.
Custom outer diameters, thicknesses, center holes, bolt-circle holes, positioning steps, sealing grooves and CNC-machined structures are available according to drawings and installation requirements.
Borated UHMWPE Neutron Shielding Round cover plate is a large circular neutron shielding component manufactured from a hydrogen-rich ultra-high-molecular-weight polyethylene matrix containing uniformly dispersed boron-based material. It is designed for circular equipment openings, neutron source containers, radiation shielding ports, removable access covers and other structures requiring a round or annular shielding component.
The material combines neutron moderation and thermal-neutron absorption within one engineered plastic component. Hydrogen atoms in the polyethylene matrix help reduce the energy of fast neutrons through repeated scattering interactions. After the neutrons have been slowed, the boron-containing phase helps capture the resulting thermal neutrons.
This combined working mechanism makes the product suitable for nuclear research facilities, medical accelerator shielding systems, neutron-generating equipment, isotope-production facilities, radiation testing equipment and custom neutron protection assemblies.
General information about neutron behavior is available in the
Wikipedia explanation of neutron radiation.
More information about boron and its neutron-absorption characteristics can be found in the
Wikipedia explanation of boron.
Polyethylene contains a high proportion of hydrogen atoms. Because the mass of a hydrogen nucleus is close to the mass of a neutron, collisions between fast neutrons and hydrogen nuclei can transfer a significant amount of neutron energy.
Repeated collisions inside the polyethylene matrix gradually slow the fast neutrons. The actual moderation performance depends on the neutron energy spectrum, material density, cover thickness, installation position and structure of the complete shielding system.
After the fast neutrons have been slowed, the boron-containing material helps capture the thermalized neutrons. Boron-10 has a high thermal-neutron capture capability and is commonly associated with neutron-absorbing materials.
The boron-containing phase should be evenly distributed throughout the UHMWPE matrix. Controlled raw-material mixing, compression molding, cooling and machining help reduce local differences in composition and finished product performance.
Standard polyethylene is effective for slowing fast neutrons because of its hydrogen-rich structure. Adding a boron-containing compound enables the material to absorb more of the thermal neutrons created during the moderation process.
The resulting material therefore combines neutron slowing and neutron capture within a single round cover plate. General information about this process is available in the
Wikipedia explanation of neutron capture.
UHMWPE is known for its impact resistance, low moisture absorption, low coefficient of friction and resistance to many corrosive chemicals. Additional material information is available in the
Wikipedia explanation of ultra-high-molecular-weight polyethylene.
The Borated UHMWPE Neutron Shielding Round product can be used in facilities and equipment requiring a circular, annular or removable neutron shielding structure.
For more information about UHMWPE sheets and custom-machined engineering plastic products, visit our
UHMWPE sheet and engineering plastic product center.
| Product Name | Large Borated UHMWPE Neutron Shielding Round Cover Plate |
|---|---|
| Focus Keyword | Borated UHMWPE Neutron Shielding Round |
| Base Material | Ultra-high-molecular-weight polyethylene |
| Main Function | Fast-neutron moderation and thermal-neutron absorption |
| Typical Nominal Boron Content | 5%, 10%, 15%, 20% or 30% |
| Typical Outer Diameter | 300–1500 mm |
| Large Custom Diameter | Larger diameters subject to molding, raw-material and machining feasibility review |
| Typical Thickness | 20–200 mm |
| Extra-Thick Option | Up to approximately 300 mm after production feasibility review |
| Center Opening | Optional and manufactured according to customer drawings |
| Available Shapes | Solid round plate, annular plate, stepped cover and circular shielding plug |
| Available Colors | Black, green, blue or project-specified colors |
| Processing Services | Turning, milling, drilling, countersinking, grooving and CNC machining |
| Optional Structures | Center holes, bolt holes, lifting holes, sealing grooves, positioning steps and installation recesses |
| Supply Form | Finished round covers, annular plates, shielding plugs and machined components |
The dimensions listed above are common production ranges rather than fixed specifications. Final diameter, thickness, dimensional tolerance, flatness, boron formulation and machining structure should be confirmed according to the customer’s drawings and neutron shielding calculations.
Borated UHMWPE Neutron Shielding Round cover plates can be manufactured with different nominal boron contents according to the neutron energy spectrum, required attenuation level and project design. Common nominal options include 5%, 10%, 15%, 20% and 30%.
The specification should clearly state whether the percentage refers to elemental boron, boron carbide, boron oxide or the total weight percentage of another boron-containing compound. These definitions are not interchangeable.
Different boron-containing formulations may influence neutron absorption capability, material density, impact resistance, surface quality, machining performance and dimensional stability. The appropriate formulation should therefore be selected according to technical documentation and professional shielding calculations.
The round cover plate can be manufactured according to the equipment opening, installation method and maintenance requirements. Available structures include:
Stepped, recessed or overlapping structures can help reduce direct gaps around the edge of the shielding cover. The required overlap width and step depth should be determined according to the radiation direction, adjoining shielding structure, plate thickness and installation clearance.
Large Borated UHMWPE Neutron Shielding Round components can be processed using CNC turning, milling and drilling equipment. They can be manufactured from molded circular blanks or cut from large molded UHMWPE plates, depending on the required diameter, thickness and order quantity.
A typical production process may include:
For large-diameter or extra-thick components, sufficient machining allowance should be reserved before final processing. Important dimensions such as the outside diameter, center-hole diameter, bolt-hole position, pitch circle diameter, step depth and sealing-groove dimensions should be clearly marked on the drawing.
Neutron shielding performance may be affected by gaps around the edge of the cover, mounting holes, cable openings, pipe penetrations and other installation details. The cover plate should therefore be designed as part of the complete shielding assembly.
Installation methods may include bolted fixing, recessed installation, stepped joints, overlapping structures or installation inside a metal supporting frame. Metal inserts and reinforcing structures should be positioned carefully to avoid unnecessary direct openings through the shielding material.
Borated UHMWPE Neutron Shielding Round cover plate is primarily intended for neutron moderation and thermal-neutron absorption. It should not automatically be considered a complete standalone shielding material for gamma rays or X-rays.
When neutron radiation is accompanied by significant photon radiation, the complete system may require lead, steel or another high-density material. The arrangement and thickness of the different shielding layers should be determined according to the radiation source and professional shielding calculations.
General information about controlling radiation exposure through shielding, distance and exposure time is available in the
Wikipedia explanation of radiation protection.
Quality inspection for a Borated UHMWPE Neutron Shielding Round cover plate may include raw-material verification, formulation control, molding-process inspection, dimensional measurement, surface inspection and final machining inspection.
Typical inspection items include:
To prepare an accurate quotation, please provide the following information:
The final shielding thickness, boron formulation, cover structure and installation arrangement should be reviewed by a qualified radiation protection engineer, medical physicist, health physicist or other authorized project professional before manufacturing and installation.
Check drawings for full specifications and confirm materials according to service conditions to prevent product defects.
Inspect all key processing steps and fully verify dimensions, holes, grooves and fitting surfaces.
Deburr, chamfer and clean products for easy installation. Ensure uniform quality among batch products.
Choose appropriate packaging solutions based on product features to protect goods from collision, deformation and mixing during transit.
Unlike metal parts, engineering plastic components still require strict control over dimensions, holes, edges, surface, materials and assembly performance for equipment use.
Engineering plastic parts suit friction, guide, support, buffer, anti-corrosion and insulation areas. We supply UHMWPE, POM, PA, PP/PE components for conveyor, food, mining, machinery, chemical and cable systems, with custom OEM service available.
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