The Kansai Electric Power Co., Inc. introduced High-AVT (LO) water treatment to Himeji No.2 Power Station which was newly built in 2013, based on the research results at Himeji No.1 Power Station. This water treatment maintains a pH value higher than the existing method, and hydrazine is not injected into feedwater. It was confirmed through the water quality analysis and equipment inspections that High-AVT(O) water treatment is effective, and this paper presents these results. This achievement is reflected in the 2015 revision of JIS B 8223: Water conditioning for boiler feed water and boiler water.
