CHF Experiments Using a 2-D Curved Test Section With Additives for IVR-ERVC Strategy

Abstract

This study describes critical heat flux (CHF) experiments using a 2-D curved test section with trisodium phosphate (TSP : Na3PO4) and boric acid (BA : H3BO5). The CHF values of TSP solution, BA solution, and TSP + BA solution were enhanced by as much as 50% for all experimental conditions except the condition of 150 mm radius with BA solution. The enhancement can be explained by wettability enhancement and decrease of bubble departure diameter. This CHF enhancement could provide additional thermal margin for the IVR-ERVC strategy.