| Radiation Type and Energy | Confirm the beta-emitting radionuclide, maximum beta energy, activity, exposure geometry, and operating distance. | Beta particles are high-speed electrons or positrons. Shielding requirements depend more on maximum beta energy and source configuration than on activity alone. | A shield selected without source-energy data may provide insufficient protection or unnecessary thickness. | Technical design review, source information form, shielding calculation, and documented assumptions. |
| Primary Shield Material | Check whether the design uses a low-atomic-number material, such as acrylic or polycarbonate, as the first shielding layer. | Low-Z materials reduce the production of bremsstrahlung X-rays when stopping energetic beta particles. | Using a high-Z material directly against a strong beta source can increase secondary photon radiation. | Material certificate, material grade, density data, and written justification for the material selection. |
| Secondary Photon Shielding | Determine whether a higher-density backing layer is required after the beta particles are slowed or stopped. | Lead or other dense materials may be used behind a low-Z layer to attenuate bremsstrahlung, depending on the source energy and geometry. | A combined low-Z and high-Z design can control both beta particles and generated X-rays. | Shielding analysis showing layer order, thickness, photon dose considerations, and acceptance criteria. |
| Material Options | Compare acrylic, polycarbonate, aluminum, lead, and purpose-designed composite structures according to the application. | Acrylic and polycarbonate are commonly used for beta shielding and visibility. Aluminum can be suitable for some lower-energy beta applications. Lead is generally used for photon attenuation or as a backing layer rather than as the first beta barrier. | Material choice affects radiation performance, visibility, weight, impact resistance, chemical compatibility, and cost. | Material datasheets, sample inspection, chemical-resistance information, and application-specific recommendations. |
| Shield Thickness and Geometry | Review wall thickness, overlap, seams, apertures, viewing windows, penetrations, and distance from the source. | Protection depends on the complete geometry, not only the nominal panel thickness. Gaps and direct-line openings can create dose-rate hot spots. | Correct geometry prevents leakage around edges and supports consistent protection during normal operation. | Dimensioned drawings, 3D models where appropriate, tolerance information, and dose-rate calculation or validation plan. |
| Visibility and Handling | Assess whether operators need a transparent viewing panel, remote handling, integrated grips, wheels, or fixed mounting. | Transparent acrylic or polycarbonate can support visual monitoring while maintaining beta shielding; optical clarity and scratch resistance should also be considered. | Good ergonomics reduce the time spent near the source and help prevent incorrect shield placement. | Prototype or sample panel, handling instructions, load rating, and user-interface design review. |
| Mechanical and Environmental Performance | Check impact resistance, dimensional stability, temperature range, humidity exposure, chemical contact, and cleanability. | Polycarbonate generally offers higher impact resistance than acrylic, while acrylic often provides strong optical clarity and surface hardness. | The shield must remain stable and usable under the actual laboratory, medical, industrial, or research conditions. | Mechanical test data, environmental specifications, chemical compatibility chart, and maintenance requirements. |
| Radiation Safety Documentation | Verify that the supplier can provide safety-related calculations, limitations, and operating instructions. | Shielding performance should be assessed by a qualified radiation-protection professional in accordance with applicable local requirements. | Documentation supports safe installation, regulatory review, operator training, and future inspections. | Shielding report, user manual, warning labels, installation instructions, and inspection checklist. |
| Manufacturing Quality Control | Review dimensional inspection, surface inspection, material traceability, assembly controls, and final acceptance procedures. | Transparent shields should be checked for cracks, bubbles, chips, unacceptable distortion, and edge defects. Composite shields require verification of layer order and bonding quality. | Consistent manufacturing reduces weak points and helps ensure that delivered units match the approved design. | Quality plan, inspection records, material traceability, nonconformance process, and final inspection report. |
| Application Suitability | Match the shield design to the working environment and source-handling method. | Typical applications include radiochemistry, nuclear medicine, laboratory beta counting, isotope production, research facilities, and industrial tracer work. | A bench-top enclosure, mobile screen, instrument shield, and process enclosure have different geometry, access, and maintenance needs. | Application reference designs, risk assessment, installation plan, and evidence of experience with comparable use cases. |
| Customization Capability | Determine whether the supplier can produce custom dimensions, cut-outs, access doors, viewing panels, stands, and modular sections. | Custom features should be incorporated without compromising shielding continuity, structural stability, or cleanability. | Properly integrated customization is safer and more reliable than field modifications made after delivery. | Engineering drawings, design-change procedure, sample approval process, and prototype or first-article inspection. |
| Delivery and Lifecycle Support | Evaluate lead time, packaging, installation support, replacement parts, warranty terms, and service responsiveness. | Large transparent panels and assembled enclosures require protective packaging to prevent scratching, cracking, distortion, and transit damage. | Reliable after-sales support helps maintain protection throughout the shield's service life. | Written quotation, delivery schedule, packaging specification, warranty policy, spare-parts plan, and service contact process. |