稳压器波动管热分层分析

Thermal Stratification Study for Pressurizer Surge Line

为评价热分层对稳压器波动管结构完整性的影响,从理论上分析了稳压器波动管热分层发生的条件。以百万千瓦级三环路压水堆核电厂核反应堆启堆为例,建立了热分层瞬态,研究了热分层应力计算方法,从理论上将一个复杂的三维应力分析问题简化为一维和二维组合问题。结合ANSYS程序功能,提出了波动管热分层应力计算的工程方法。

In order to confirm the structural integrity of pressurizer surge line affected by thermal stratification, this paper theoretically analyzes the criterion of thermal stratified occurrence, establishes the thermal stratified transient by start-up of reactor, and studies the calculation method of thermal stratified stress. A complex 3-dimension problem is simplified into a combined one of 1-dimension and 2-dimension. Considering ANSYS code function, an engineering method is put forward for thermal stratified stress calculation of pressurizer surge line.