破口事故比例模拟中安全壳破口源项参数评估研究

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Study on Source Term Evaluation Method in Simulation and Scaling for Containment during LOCA

I. INET of Tsinghua University, Beijing, 100084, China;
2. Key Laboratory of Nuclear Engineering and Safety of MOE, Beijing, 102201, China

摘要: 采用基于破口总焓相似、强迫射流及浮力羽流流场相似及传热传质过程相似的多约束分析体系,归纳与质能源项相关的传热传质过程、耗散过程以及自然循环过程的时间尺度,确定模拟实验源项满足的各种模拟工况所必须遵循的设计约束条件。分析表明,自然循环过程时间常数是约束不同物理过程最重要的基础参数,也是模拟装置设计的基本约束参数。给出适用于确定安全壳破口源项试验参数的计算关系式,用于计算获得试验装置的几何参数和试验边界条件。
- 安全壳 /
- 相似分析 /
- 破口源项 /
- 射流 /
- 传热传质
Abstract: Source term is one of the most important parameters involved in the simulation of LOCA inside containment.It may affect facilities scale,simulation stage,equipment design level and simulating authentic.Based on the scaling rules related to the total break enthalpy,force jet and buoyant plume and heat and mass transfer process,the time scale of heat/mass transfer and flow dissipation are normalized to the time scale of natural circulation.It proves that the natural circulation process time ratio is the dominant parameter for whole system design.Functions which can be applied for geometry sizes and boundary conditions are also provided.
- Containment /
- Scaling analysis /
- Break source term /
- Jet /
- Heat and mass transfer