基于FDS程序的钠火事故情景模拟技术研究

Sodium Fire Accident Scenario Simulation Technology Study Based on FDS Code

钠火是钠冷快堆的典型事故,钠火事故情景计算机模拟仿真是对钠火事故风险评价的有力工具。本文以常规火灾三维计算流体力学软件FDS为平台,增加钠火燃烧模型,包括燃烧热模型、燃烧速率模型、喷射液钠粒径分布模型等,完成了钠火情景模型的开发,并通过与SPHINCS钠火试验和计算结果的温度分布与氧气含量对比,验证了模拟技术和模型开发方案的可行性。本文的研究成果能为后续钠火仿真模拟程序的开发提供研究基础和经验参考。

Sodium fire is a typical accident of sodium-cooled fast reactor.Simulation of sodium fire accident scenario by software is a powerful tool for risk assessment of sodium fire accident.In this paper,the conventional fire three-dimensional computational fluid dynamics software FDS was used as a platform to add a sodium fire combustion model,including combustion heat model,combustion rate model,spray liquid sodium particle size distribution model,etc.,and complete the development of sodium fire scenario modeling analysis program.And through the comparison with SPHINCS sodium fire test and calculation results,the feasibility of the method and development plan was verified.The research results of this paper can provide the research basis and experience reference for the development of the subsequent sodium fire simulation program.