Application of Induction Accelerators for Electron Beam Radiolysis of Contaminated Water

目前，人们对开发净化和消毒废水的改进方法非常感兴趣。直接电子束照射是有吸引力的，因为自由基的形成和对污染物的攻击是能量有效的和相对非选择性的。有效的去污已被证明与能源投资远低于1.0兆拉德。虽然已经应用了各种电子加速器，但大规模实施受到过大尺寸、初始成本、可靠性或可扩展性的阻碍。在科学研究实验室（SRL）开发的感应加速器技术提供了克服这些限制的希望。这项工作的目的是开发一种新的，低成本和可靠的工艺和废水净化使用线性感应加速器技术。SRL加速器在紧凑的结构中产生电子束，该结构采用全固态开关的可靠性，通过高脉冲速率提供高平均功率。SRL在1.2 MeV电子能量下的初步试验表明，有效和高效地破坏了水中的有机污染物。拟议的第一阶段工作将把这些数据扩大到更宽的初始浓度范围（1-1000 ppm）和更宽的剂量范围（0.05-6.0 Mrad），为系统概念设计、优化和成本计算提供基础。此外，由于感应加速器的峰值剂量率高于（100-1000倍）由静电加速器提供的速率，该参数将被改变，以寻求潜在的进一步提高系统效率。SRL现有的SNOMAD-IV感应加速器最近升级到1.5 MeV，将用于这项工作。该系统已被耦合到一个流动的污染水系统，为拟议的研究提供了一个独特的设施。

There is currently an active interest in the development of improved methods to decontaminate and disinfect waste water. Direct electron beam irradiation is attractive since radical formation and attack on contaminants is energy efficient and relatively nonselective. Effective decontamination has been demonstrated with an energy investment well below 1.0 MRads. Although various electron accelerators have been applied, large scale implementation has been impeded by excessive size, initial cost, reliability, or scaleability. Induction accelerator technology as developed at Science Research Laboratory (SRL) offers the promise to surmount these limitations. The objective of this effort is to develop a new, low cost and reliable process for decontamination of process and wastewater using linear induction accelerator technology. Electron beams are produced with the SRL accelerator in a compact configuration which employs the reliability of all-solid-state switching to provide high average power through high pulse rate. Preliminary tests at SRL at 1.2 MeV electron energy have shown effective and efficient destruction of organic contaminants in water. The proposed Phase I work will expand these data to a wider range (1-1000 ppm) in initial concentrations, and a wider range (0.05-6.0 MRads) in dosage to provide a basis for system conceptual design, optimization and costing. In addition, since peak dose rate for induction accelerators is higher (100-1000 times) than rates delivered by electrostatic accelerators, this parameter will be varied to seek potential further improvement in system efficiency. The existing SNOMAD-IV induction accelerator at SRL with recent upgrade to 1.5 MeV will be used in this effort. This system has been coupled to a flowing contaminated water system to provide a unique facility for the proposed research.