核设施安全级离心风机的相似法抗震鉴定

Seismic Qualification of Centrifugal Fan Used in Nuclear Facilities by Similarity Analysis

摘要: 核设施中的能动机械设备结构复杂、零部件装配要求高，在安全停堆地震下不仅要保证其结构完整性，还可能要保持其可运行性。近年来，借助已鉴定样机通过相似法开展待鉴定样机的抗震鉴定由于时间短、花费少，受到设计单位、制造单位、营运单位和监管部门的高度关注。本文论述了采用相似法抗震鉴定的基本要求、补充分析评定的评定准则，并结合安全级风机的主要失效模式给出了采用相似法和补充分析法进行抗震鉴定的示例。

Abstract: Due to the complex structure and high assembly requirements of the active mechanical equipment used in nuclear facilities, it is necessary to ensure its structural integrity and maintain its operability under the safe shutdown earthquake. With the help of the identified prototype, the seismic evaluation of the prototype to be evaluated by similarity method is highly valued by the design unit, manufacturing unit, operation unit and supervision unit due to its short time and low cost. This paper discusses the basic requirements of seismic appraisal by using similarity method and the evaluation criteria of supplementary analysis. Combined with the main failure modes of safety grade fans, an example of seismic appraisal by using similarity method and supplementary analysis is given.