摘要
主要研究快速提升功率(RAMP)对包壳应力的影响,并为芯块—包壳机械作用(PCMI)的分析提供依据。分析采用包壳效应力作为指标,参照相关试验的功率,使用燃料棒性能分析程序RoPE模拟相应工况,归纳整理包壳效应力随RAMP速率变化的规律。分析结果显示,随着RAMP速率的增大,最大包壳效应力也会相应的升高,但当速率大于10 kW·m^(-1)·min^(-1)后,应力趋于饱和。这一规律与热学分析结果相吻合。故在PCMI分析与试验中采用此RAMP速率是合理的。
The purpose of this paper is to study the effect of RAMP rate on cladding stress,and to provide a basis for PCMI. By selecting the effective stress of cladding as the index,the trend of the change of cladding stress corresponding to the change of RAMP is summarized with the simulated operating conditions（ by RoPE） and relevant experiments. The results show that with the increase of RAMP rate,the maximum effective stress grows correspondingly; however,when the rate is more than 10 kW·m-1·min-1,the stress tends to be saturated. This rule meets the results of thermal analysis. Consequently,it is reasonable to adopt this RAMP rate in PCMI analysis and testing.
作者
韦享雨
Wei Xiɑnɡyu(Shanghai Nuclear Engineering Research ＆Design Institute, Shanghai 200233, Chin)
出处
《核安全》
2018年第2期48-51,共4页
Nuclear Safety
