Study on Effect of Reverse Density Difference on Natural Circulation of Reactor Primary System
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摘要: M310型核电厂在反应堆停堆、主泵停运并维持轴封注入工况下,一回路过渡段存在反向密度位差,堆芯余热较低时会终止自然循环。本文给出M310型反应堆一回路自然循环计算模型,分析造成自然循环终止的原因,并采用工程计算软件MATHCAD计算维持自然循环所需最小余热。Abstract: For M310 nuclear power plant, when reactor and coolant pumps trip, reverse density difference occurs in the crossover leg at seal injection condition, the natural circulation ceases if the core power decreases too much. This paper introduces the calculation model of the natural circulation, analyzes the reason for the ceasing of the natural circulation, and utilizes MATHCAD code to calculate the minimum core power.
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Key words:
- Natural circulation /
- Minimum power /
- Protection of boron dilution
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