Development of a computer model for predicting CANDU fuel string vibration induced by turbulent coolant flow

开发用于预测冷却剂湍流引起的 CANDU 燃料管柱振动的计算机模型

• 批准号: 396148-2009
• 负责人: Yu, Shudong
• 金额: $ 1.03万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=487448
• 关键词: Development; computer; model; predicting; CANDU

Fuel endplate failures and severe pressure tube wear were discovered in some CANDU reactors only a few years after their commercial operations. Investigations revealed that (i) the fuel endplate failure was caused by the acoustics originated at the primary heat transport pump and (ii) the presence of moderate to severe fretting marks on the inside surfaces of the pressure tubes was caused by the excessive movement (vibration) of the bearing pads. Further investigations showed that fretting of varying degrees was present in all fuel channels. Fuel string fretting thus becomes an integrity concern for the CANDU reactors.

一些CANDU反应堆在商业运行后仅几年就发现了燃料端板失效和压力管严重磨损。调查表明，（i）燃料端板故障是由主传热泵产生的噪音引起的，（ii）压力管内表面上存在中度至重度微动磨损痕迹是由轴瓦过度移动（振动）引起的。进一步的调查表明，不同程度的微动磨损存在于所有的燃料通道。 因此，燃料串微动成为CANDU反应堆的完整性问题。