Radium Incorporated, 463 Dinwiddie Avenue, Waynesboro, VA 22980.
Health Phys. 2020 Dec;119(6):776-785. doi: 10.1097/HP.0000000000001336.
Radiation protection materials, such as lead (Pb), water, concrete, steel, and aluminum, have been successfully used for decades. Although they are effective shields, these materials do have limitations. For example, lead is heavy and toxic, and water and concrete must be thick to provide significant shielding, all of which renders these materials prohibitive for certain applications. For example, the half-value layer for water to shield against Co is 30.48 cm (12"), which makes it an extremely bulky material. The development of ClearView Radiation Shielding addresses some of the limitations that are faced by traditional radiation protection shields. The product is a transparent liquid gamma radiation shield that can be fabricated in custom sizes and thicknesses. Here, we describe applications of ClearView Radiation Shielding in nuclear plants and hospitals. ClearView Radiation Shielding is used to shield nuclear power plant workers from Co in critical path and high dose in refueling outages to observe automated operations inside the containment, and operations such as cylindrical frisking stations and benchtop sampling. ClearView Radiation Shielding is designed as rolling shields and radionuclide containments in hospitals to protect staff and families during unsealed radionuclide treatment such as MIBG and Lutetium therapies. For successful implementation in hospitals, the product was tested against various radioisotopes, also described in this work. Operational uses of ClearView Radiation Shielding in commercial nuclear and medical industries allows staff working in radioactive environments visibility, better communication and similar levels of radiation protection compared with traditional shielding materials. The product helps improve workflows and reduced total dose received by workers. Additionally, attenuation measurements using ClearView Radiation Shielding against multiple isotopes was performed. With 1.25 cm (0.5") ClearView Radiation Shielding thickness, the shield attenuated 1) 65% of the effective dose from I, 2) 35.15% of the effective dose from Cs, and 3) 22.5% of the effective dose from Co. Isotopes in the range of 35 keV to 1899 keV. 3.81 were attenuated greater than 90% with a ClearView Radiation Shielding shield thickness of 7.62 cm (3"). The half-value layer for Co with a ClearView Radiation Shielding thickness of 3.81 cm (1.5") attenuated the effective dose of F gammas by 85.59%. With a density of 2.3 g cm, ClearView Radiation Shielding was measured to be half the weight of lead for equal shielding. ClearView Radiation Shielding is transparent, lightweight, and an alternative material to conventional radiation shields to reduce radiation exposure.
辐射防护材料，如铅 (Pb)、水、混凝土、钢和铝，已成功应用数十年。尽管它们是有效的屏蔽物，但这些材料确实存在局限性。例如，铅是重金属且有毒，而水和混凝土必须足够厚才能提供显著的屏蔽效果，这使得这些材料在某些应用中变得不切实际。例如，水对 Co 的半值层为 30.48 厘米（12 英寸），这使其成为一种极其庞大的材料。ClearView 辐射屏蔽的开发解决了传统辐射防护屏蔽所面临的一些限制。该产品是一种透明的液体伽马辐射屏蔽物，可以定制尺寸和厚度进行制造。在这里，我们描述了 ClearView 辐射屏蔽在核电站和医院中的应用。ClearView 辐射屏蔽用于保护核电站工作人员免受 Co 在关键路径和高剂量的影响，以便在容器内观察自动化操作，以及圆柱形搜查站和台式采样等操作。ClearView 辐射屏蔽设计为滚动屏蔽物和放射性核素容器，用于在密封放射性核素治疗期间保护工作人员和家属，例如 MIBG 和镥治疗。为了在医院中成功实施，该产品针对各种放射性同位素进行了测试，本工作也对这些同位素进行了描述。ClearView 辐射屏蔽在商业核和医疗行业中的实际应用使在放射性环境中工作的人员具有可见度、更好的沟通能力以及与传统屏蔽材料相当的辐射防护水平。该产品有助于改善工作人员的工作流程并降低其总剂量。此外，还对 ClearView 辐射屏蔽针对多种同位素的衰减进行了测量。使用 1.25 厘米（0.5 英寸）厚的 ClearView 辐射屏蔽，屏蔽物衰减了 1）来自 I 的有效剂量的 65%，2）来自 Cs 的有效剂量的 35.15%，以及 3）来自 Co 的有效剂量的 22.5%。35 keV 至 1899 keV 范围内的同位素。7.62 厘米（3 英寸）厚的 ClearView 辐射屏蔽可以衰减超过 90%的 3.81。对于 3.81 厘米（1.5 英寸）厚的 ClearView 辐射屏蔽，Co 的半值层衰减了 F 伽马的有效剂量的 85.59%。ClearView 辐射屏蔽的密度为 2.3 g cm，其重量为同等屏蔽效果的铅的一半。ClearView 辐射屏蔽是一种透明、轻便的替代传统辐射屏蔽材料，可降低辐射暴露。
