A Nonequilibrium Three-Region Model for Transient Analysis of Pressurized Water Reactor Pressurizer
A Nonequilibrium Three-Region Model for Transient Analysis of Pressurized Water Reactor Pressurizer
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DOI：
10.13182/nt86-a33828
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发表时间：
1986-09
影响因子：
1.5
通讯作者：
S. Baek;H. No;In Yong Park
中科院分区：
文献类型：
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作者：
S. Baek;H. No;In Yong Park
为了准确预测稳压器在瞬态和事故工况下的压力，建立了一个非平衡三区模型，该模型从一般守恒方程出发，包括稳压器中发生的所有重要热工水力过程：本体闪蒸和冷凝、壁冷凝和界面传热和传质，通过对实验结果的拟合，得到了界面换热系数的Stanton数。气泡上升和雨出模型分别描述散装闪蒸和冷凝，。采用旋转法求解一维热传导方程，得到壁面凝结率，并采用回代和逐次迭代法对数学模型进行数值求解，以保证快速收敛和稳定性。为了验证数值计算的正确性，对某核电站的一次温和瞬态进行了数值试验。
A nonequilibrium three-region model is developed for the accurate prediction of the pressure in the pressurizer under both transient and accident conditions.The mathematical model derived from the general conservation equations includes all of the important thermal-hydraulics processes occurring in the pressurizer: bulk flashing and condensation, wall condensation, and interfacial heat and mass transfer, etc. The Stanton number for the interfacial heat transfer coefficient is obtained by fitting the experimental results in terms of the surge rate. The bubble rising and rain-out models are developed to describe bulk flashing and condensation, respectively. To obtain the wall condensation rate, a one-dimensional heat conduction equation is solved by the pivoting method.The mathematical model is numerically solved by the back substitution and successive iteration method for fast convergence and stability.For verification, several numerical tests are done on a mild transient in the Shippingport nuclear power ...