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Improved drift-flux correlation to enhance the prediction of void fraction in nuclear reactor fuel bundles at low flow and elevated pressure conditions
Journal of Nuclear Science and Technology ( IF 1.2 ) Pub Date : 2019-12-17 , DOI: 10.1080/00223131.2019.1700843
Ikuo Kinoshita 1 , Joshua P. Schlegel 2 , Takashi Hibiki 3
Affiliation  

ABSTRACT The EPRI (1991) and the Clark et al. (2014) drift-flux correlations implemented in RELAP5/MOD3 code were benchmarked against the low-pressure void fraction data collected by Clark et al. (2014) at Purdue University and the high-pressure data collected by Anklam and Miller (1982) at ORNL. The Clark et al. correlation (2014) was found to perform best at low pressures of Clark et al. tests (2014), but the accuracy was deteriorated at higher pressures of Anklam and Miller tests (1982). To account for this effect, a pressure scaling factor has been added to the distribution parameter correlation to reduce the distribution parameter peaking at high pressures. This factor is dependent on the density ratio and it eliminates the distribution parameter enhancement effect for pressures over 0.5 MPa. It was confirmed that the new correlation with the correction improved the void fraction prediction performance at a higher pressure of Anklam and Miller tests (1982). The new correlation provides a transition between the Clark et al. correlation (2014) at low pressures and the correlation of Ozaki et al. (2013) and Ozaki and Hibiki (2015) at high pressures, which is excellent both in physical characteristics and scalability of two-phase flow in rod bundles.

中文翻译:

改进的漂移通量相关性以增强对低流量和高压条件下核反应堆燃料束中空隙率的预测

摘要 EPRI (1991) 和 Clark 等人。(2014) 在 RELAP5/MOD3 代码中实现的漂移-通量相关性根据 Clark 等人收集的低压空隙率数据进行了基准测试。(2014) 在普渡大学以及 Anklam 和 Miller (1982) 在 ORNL 收集的高压数据。克拉克等人。发现相关性(2014)在克拉克等人的低压下表现最佳。测试(2014 年),但精度在 Anklam 和 Miller 测试(1982 年)的较高压力下恶化。为了解决这种影响,已将压力缩放因子添加到分布参数相关性中,以减少分布参数在高压下的峰值。该因素取决于密度比,它消除了压力超过 0.5 MPa 时的分布参数增强效应。Anklam 和 Miller 测试 (1982) 证实,与校正的新相关性提高了更高压力下的空隙率预测性能。新的相关性提供了克拉克等人之间的过渡。低压下的相关性 (2014) 和 Ozaki 等人的相关性。(2013) 和 Ozaki 和 Hibiki (2015) 在高压下,在棒束两相流的物理特性和可扩展性方面都非常出色。
更新日期:2019-12-17
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