Development of a Fast Neutron Computed Tomography System for Non-Invasive Testing

用于非侵入性测试的快中子计算机断层扫描系统的开发

• 批准号: 532146-2018
• 负责人: Novog, David
• 金额: $ 7.63万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=697331
• 关键词: Development; Fast; Neutron; Computed; Tomography

This research grant aims to develop a novel computed tomography system which is capable of measuring 3-dimensional phasic distributions inside complex engineering structures. Phase-change phenomena greatly impact the physics in many engineering systems but direct measurement of the 3-dimensional phase field has historically involved intrusive measurements and/or may not be applied universally to systems that operate under boiling conditions at high pressure and temperatures. The industrial collaborator for this work is the CANDU Owners Group and their goal is to obtain measurements of the phase field inside a CANDU fuel string simulator where boiling occurs and pressures can exceed 10 MPa in order to generate data for model improvement and multi-phase computational fluid dynamics validation. A review of existing commercially available measurements has indicated that there is a need for new advancements in 3D non-destructive testing in this area with application to the nuclear industry as well as other sectors where phase change phenomena can occur. This project will develop a fast-neutron computed tomography (FCNT) system capable of imaging 3-dimensional phase-field distributions in complex geometries and involving thick pressure boundaries. The new technology development is possible today due to radical improvements in mobile nuetron generator technologies which have increased in neutron output from 1e7 to 1e10 over the last ten years. It integrates new developments in the area of accelerator based neutron generators, new Silicon-Photo multiplier (SiPM) technologies with existing CT schemes to obtain a new mobile system capable of meeting current and future R&D demands. The goal is to have the technology render distributions with 1cm or better resolution and scan times which are acceptable to industry (on the order of 1 hour as opposed to multiple hours or days required with some historical system). The work represents the first-of-its-kind technology in Canada and will have wide ranging applications across various R&D sectors in Canada.

该研究经费旨在开发一种新型计算机断层扫描系统，该系统能够测量复杂工程结构内的 3 维相位分布。 相变现象极大地影响了许多工程系统中的物理现象，但 3 维相场的直接测量历来涉及侵入式测量和/或可能无法普遍应用于在高压和高温沸腾条件下运行的系统。 这项工作的工业合作者是 CANDU Owners Group，他们的目标是获得 CANDU 燃料管模拟器内发生沸腾且压力可能超过 10 MPa 的相场测量结果，以便生成用于模型改进和多相计算流体动力学验证的数据。 对现有商用测量的审查表明，该领域的 3D 无损检测需要取得新的进步，并将其应用于核工业以及可能发生相变现象的其他领域。 该项目将开发一种快中子计算机断层扫描 (FCNT) 系统，能够对复杂几何形状并涉及厚压力边界的 3 维相场分布进行成像。 由于移动中子发生器技术的彻底改进，过去十年中中子输出从 1e7 增加到 1e10，今天新技术的开发成为可能。 它将基于加速器的中子发生器领域的新发展、新的硅光电倍增器（SiPM）技术与现有的CT方案相结合，以获得能够满足当前和未来研发需求的新移动系统。 目标是让该技术以 1 厘米或更好的分辨率和行业可接受的扫描时间渲染分布（大约 1 小时，而不是某些历史系统所需的数小时或数天）。 这项工作代表了加拿大首创的技术，并将在加拿大各个研发部门得到广泛应用。