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Theoretical investigation on the steady-state natural circulation characteristics of a new type of pressurized water reactor

机译:新型压水堆稳态自然循环特性的理论研究

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This article presents a theoretical investigation on the steady-state natural circulation characteristics of a new type of pressurized water reactor. Through numerically solving the one-dimensional steady-state single-phase conservative equations for the primary circuit and the steady-state two-phase drift-flux conservative equations for the secondary side of the steam generator, the natural circulation characteristics were studied. On the basis of the preliminary calculation analysis, it was found that natural circulation mass flow rate was proportional to the exponential function of the power and that the value of the exponent is related to the operating conditions of the secondary side of the steam generator. The higher the outlet pressure of the secondary side of the steam generator, the higher the primary natural circulation mass flow rate. The larger height difference between the core center and the steam generator center is favorable for the heat removal capacity of the natural circulation.
机译:本文对新型压水堆的稳态自然循环特性进行了理论研究。通过数值求解一次回路的一维稳态单相保守方程和二次回路的稳态两相漂移通量保守方程,研究了自然循环特性。在初步计算分析的基础上,发现自然循环质量流量与功率的指数函数成正比,并且指数的值与蒸汽发生器次级侧的工作条件有关。蒸汽发生器的次级侧的出口压力越高,初级自然循环质量流量就越高。堆芯中心与蒸汽发生器中心之间较大的高度差有利于自然循环的散热能力。

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