标题： JUNO中微子探测器的蒸馏和汽提中试装置：设计、操作和可靠性 显示英文标题

标题： Distillation and stripping pilot plants for the JUNO neutrino detector: design, operations and reliability

摘要： 本文描述了在大亚湾中微子实验室测试的蒸馏和汽提中试装置的设计、构造原理和操作，旨在将这些工艺、系统清洁度和气密性适应到将用于JUNO中微子探测器中液体闪烁体纯化的最终全尺寸装置。 这些装置的主要目标是在去除液体闪烁体中的放射性杂质的同时，增加其光学衰减长度。 液体闪烁体的纯化将采用结合氧化铝、蒸馏、水萃取和蒸汽（或N2气体）汽提的系统。 这种组合系统旨在获得430纳米波长下大于20米的总衰减长度，并且238U和232Th的体辐射纯度在10-15至10-17克/克范围内。 中试装置的调试和运行也提供了关于其主要部件可靠性的有价值信息，这将对JUNO液体闪烁体最终全尺寸纯化设备的设计特别有用。 本文描述了五个中试装置中的两个，因为氧化铝柱、荧光混合和水萃取装置由中国合作方负责。 显示英文摘要

摘要： This paper describes the design, construction principles and operations of the distillation and stripping pilot plants tested at the Daya Bay Neutrino Laboratory, with the perspective to adapt this processes, system cleanliness and leak-tightness to the final full scale plants that will be used for the purification of the liquid scintillator used in the JUNO neutrino detector. The main goal of these plants is to remove radio impurities from the liquid scintillator while increasing its optical attenuation length. Purification of liquid scintillator will be performed with a system combining alumina oxide, distillation, water extraction and steam (or N2 gas) stripping. Such a combined system will aim at obtaining a total attenuation length greater than 20 m at 430 nm, and a bulk radiopurity for 238U and 232Th in the 10-15 to 10-17 g/g range. The pilot plants commissioning and operation have also provided valuable information on the degree of reliability of their main components, which will be particularly useful for the design of the final full scale purification equipment for the JUNO liquid scintillator. This paper describe two of the five pilot plants since the Alumina Column, Fluor mixing and the Water Extraction plants are in charge of the Chinese part of the collaboration.