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首页> 外文会议>INMM annual meeting >CONTAINER VERIFICATION USING OPTICALLY STIMULATED LUMINESCENCE
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CONTAINER VERIFICATION USING OPTICALLY STIMULATED LUMINESCENCE

机译：使用光激发的发光度验证容器

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Containment verification is a high priority for safeguards containment and surveillance. Nuclear material containers, safeguards equipment cabinets, camera housings, and detector cable conduit are all vulnerable to tampering. Even with a high security seal on a lid or door, custom-built hinges and interfaces, and special colors and types of finishes, the surfaces of enclosures can be tampered with and any penetrations repaired and covered over. With today’s technology, these repairs would not be detected during a simple visual inspection. Several suggested solutions have been to develop complicated networks of wires, fiber-optic cables, lasers or other sensors that line the inside of a container and alarm when the network is disturbed. This results in an active system with real time evidence of tampering but is probably not practical for most safeguards applications. A more practical solution would be to use a passive approach where an additional security feature was added to surfaces that would consist of a special coating or paint applied to the container or enclosure. One type of coating would incorporate optically stimulated luminescent (OSL) material. OSL materials are phosphors that luminesce in proportion to the ionizing radiation dose when stimulated with the appropriate optical wavelengths. The OSL material fluoresces at a very specific wavelength when illuminated at another, very specific wavelength. The presence of the pre-irradiated OSL material in the coating is confirmed using a device that interrogates the surface of the enclosure using the appropriate optical wavelength band and then reads the resulting luminescence. The presence of the OSL material indicates that the integrity of the surface is intact. The coating itself could be transparent, which would allow the appearance of the container to remain unchanged or the OSL material could be incorporated into certain paints or epoxies used on various types of containers. The coating could be applied during manufacturing, before deployment, or even after the enclosure is already in the field. This paper presents some preliminary investigations into the use of OSL as an inexpensive, easy to implement, containment verification technique.
机译：围堵核查是保障围堵和监视的高度优先事项。核材料容器，保障设备机柜，摄像机外壳和检测器电缆导管都容易受到篡改。即使在盖或门上安装了高安全性的密封件，定制的铰链和接口以及特殊的颜色和类型的饰面，也可以篡改外壳的表面，并修复和覆盖所有的孔洞。使用当今的技术，在简单的外观检查中就不会检测到这些维修。已经提出了几种建议的解决方案来开发复杂的电线，光缆，激光器或其他传感器的网络，这些网络排列在容器内部，并在网络受到干扰时发出警报。这会产生一个具有实时篡改迹象的主动系统，但对于大多数安全保护应用而言可能不切实际。一个更实用的解决方案是使用被动方法，在该方法中，将附加的安全功能添加到表面，该功能将由应用于容器或外壳的特殊涂层或涂料组成。一种类型的涂层将掺入光激发的发光（OSL）材料。 OSL材料是磷光体，当用适当的光波长激发时，其发光强度与电离辐射剂量成正比。当在另一个非常特定的波长下照射时，OSL材料会在非常特定的波长下发出荧光。使用一种设备可以确认涂层中是否存在预辐照的OSL材料，该设备使用适当的光波段来询问外壳的表面，然后读取所产生的发光度。 OSL材料的存在表明表面的完整性是完整的。涂层本身可以是透明的，这将使容器的外观保持不变，或者可以将OSL材料掺入用于各种类型容器的某些涂料或环氧树脂中。该涂层可以在制造过程中，部署之前或什至在外壳已经在现场之后施涂。本文对OSL作为一种廉价，易于实施的密闭验证技术进行了初步研究。

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