[en] Steam generator cleaning procedure is discussed including description of Rinse phase, Heatup phase, Acid phase and the final Rinsing and Passivation phase. Results are summarized and it is concluded that preoperational chemical cleaning of the Sequoyah Nuclear Plant Unit 1 steam generators was an overall success, having accomplished the purposes of removing the rust and debris from the units as well as demonstrating the viability of the cleaning process. The reasons are presented why the fill-and-drain technique is believed to have considerable merit over a continuous circulation technique in steam generator applications