应用 GOTHIC8.0程序模拟非能动安全壳冷却系统冷凝和蒸发现象的适用性研究

摘要

在非能动安全壳冷却系统(PCS)设计基准事故的排热过程中，安全壳内壁面蒸汽冷凝现象和安全壳外壁面水膜蒸发现象是两种非常关键的排热途径。本文应用 GOTHIC8.0程序模拟了安全壳内壁面蒸汽冷凝和安全壳外壁面水膜蒸发传热过程，并通过蒸汽冷凝试验和水膜蒸发试验数据，对 GOTHIC程序的模拟结果进行了分析和评价。研究结果表明：GOTHIC 程序的蒸汽冷凝模型可较好地模拟蒸汽冷凝传热现象；水膜蒸发模型明显低估了水膜蒸发换热量，这对设计基准事故安全壳完整性分析是非常保守的，建议对 GOTHIC 程序进行适当开发，更好地模拟水膜蒸发换热过程。%The steam condensation on the inside wall of containment and film evapora-tion on the outside wall of containment are very important phenomena during passive containment cooling system (PCS)heat removal process.The GOTHIC8.0 code was used to simulate condensation and evaporation heat removal processes in this paper.The code prediction results were compared and evaluated based on experimental data of condensation and evaporation tests.The results show that the condensation model in GOTHIC can simulate steam condensation heat transfer process quite well.The film evaporation rate from GOTHIC model is lower than that from evaporation test. Although GOTHIC model is conservative to analyze containment response during design benchmark accident,it is suggested that further work should focus on making code development to better simulate film evaporation phenomenon.