B108 横型 PCCS 蒸気ブランケット効果の解析

概要

論文の詳細を見る
A passive containment cooling system (PCCS) in under planning to use in a next-generation-type BWR for long-term cooling by condensing steam using horizontal heat exchangers. Heat transfer behavior in a secondary water pool is one of important phenomena governing heat removal performance of the PCCS. It was concerned that heat transfer tubes are covered by steam under high heat flux regions and the heat transfer is degraded in the region (Steam-blanket effect). This study evaluated the steam-blanket effect through analyses of thermal-hydraulic behaviors in the secondary water pool by multi-dimensional two-fluid model code ACE-3D. Before the analyses, turbulent Prandtl number was optimized using experimental data of steam jet into a water pool. It was found from the steam-blanket analyses that no any heat transfer tubes are covered only by steam and no significant heat transfer degradation is occurred.
一般社団法人日本機械学会の論文
2000-10-30