蒸气发生器瞬态特性分析的数学模型

A MATHEMATICAL MODEL FOR TRANSIENT ANALYSIS OF STEAM GENERATOR

充分考虑蒸气发生器热工水力和结构特点，从基本的质量、动量、能量守恒方程和基本的传热、传质、流动规律出发，推导出用以求解核电厂蒸气发生器稳态运行及扰动和事故工况下各参数瞬态变化规律的数学方程，并和与之配套的传热系数关系式、阻力系数关系式、物性求解方程等一起，构成了核电厂蒸气发生器瞬态特性分析数学模型，此模型与经核电厂试验验证的Ｋｅｒｌｉｎ计算模型结果一致。

Based on the conservation equations of mass,energy and momentum,and fundamentalthermal-hydraulic laws,a new dynamic nodal calculation model of which the U-tube steamgeanerator was proposed which can be used in analysing the steam generator′s characteristicsfor both steady state and transient behaviors under accident condition,In this model,steamgenerator′s structure and thermal-hydraulic characteristics were taken into account.Manysubmodels such as the determinations of heat transfer coefficients,resistance coefficients,water and steam′s property were included in this model.Based on this model,a calculationprogram which simulates the transient behaviors of steam generator was developed.It wasused to study the transient behavior response to some disturbance,and the calculated resultswere in good agreement with those of Kerlin′s model which was verified by actual nuclearpower plant.