単相閉ループ内の自然循環流動特性に関する研究 : 第3報,5種類のクーラ形状に関する実験と解析結果

概要

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Experiments on single-phase natural circulation were conducted for five cooler configurations in the loop-type PWR for marine applications. The loop consisted of a heating box, a cooler, and connecting pipes. The transient circulation velocity and transient temperatures at different locations after pump tripping were obtained at atmospheric pressure by holding the heater input constant (Q=0.25 kW to 4 kW). The flow stability maps are shown for heat input and elevation difference, and the effects of the cooler configurations on the flow stability are clarified. In parallel with the experiments, a one-dimensional nonlinear analysis was carried out and the results were compared with the experimental results. Both agreed well qualitatively and quantitatively. Further, the effects of parameters such as overall heat transfer coefficient and pressure losses on the flow stability were obtained by this analytical simulation.
1988-08-25