Computational modeling of the fluid/thermal fields inside the moderator of CANDU reactors

CANDU 反应堆慢化剂内流体/热场的计算模型

• 批准号: 469112-2014
• 负责人: Ashgriz, Nasser
• 金额: $ 4.14万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=577374
• 关键词: Computational; modeling; fluid; thermal; fields

This proposal is aimed at determining the fluid and thermal behavior of the moderator flows inside two different nuclear reactors, namely, Bruce A and Pickering A, as well as modeling of a scaled down test facility. The latter is being designed to perform small scale tests. Because of the complexityof the system, it is difficult to use generalized scaling parameters, such as Reynolds and Archimedes numbers to scale down a real reactor. The present studyis aimed at developing criteria for the scaling and design of a scaled down testing facility. In order to achieve this goal, first using Computational Fluid Dynamics (CFD) modeling, the information on the fluid/thermal behavior of a real reactor will be determined. Then the inlet flow characteristics as well as the power inputs for a scaled down testing system will be obtained so that it provides similar fluid/thermal as in thereal reactor. We have previouslyused CFD modeling to simulate several different moderators. The results haverevealed details of the fluid flow and temperature patterns inside the moderator. In the current study, large eddysimulation (LES) of the moderator flows inside of Bruce A and Pickering A are proposed.

该提案旨在确定两个不同核反应堆（即 Bruce A 和 Pickering A）内慢化剂流的流体和热行为，以及对按比例缩小的测试设施进行建模。后者旨在执行小规模测试。由于系统的复杂性，很难使用广义的缩放参数，例如雷诺数和阿基米德数来缩小真实反应堆的尺寸。本研究旨在制定缩小测试设施的规模和设计标准。为了实现这一目标，首先使用计算流体动力学（CFD）建模，确定真实反应堆的流体/热行为信息。然后，将获得按比例缩小的测试系统的入口流量特性以及功率输入，以便它提供与真实反应器中类似的流体/热量。我们之前使用 CFD 建模来模拟几种不同的调节器。结果揭示了慢化器内部流体流动和温度模式的细节。在当前的研究中，提出了 Bruce A 和 Pickering A 内部慢化剂流的大涡模拟 (LES)。