@thesis{thesis, author={HAULIAN KEVIN and Prayudi Prayudi}, title ={ANALISIS LAJU KOROSI SUMURAN PADA RUNNER TURBIN FRANCIS UNIT III PLTA SAGULING}, year={2019}, url={http://156.67.221.169/375/}, abstract={The Saguling Power Plant Business Unit is one of the implementing units for exploiting electricity resources that uses water as primary energy to produce electricity with a total power of 700.72 MW. To improve plant reliability, the Reliability & Integrity Improvement Program is carried out. Part of this activity is Annual Inspection. and Major Overhoul. The objective is to find out the failure mode of the unit during operation, repair or replace components that have passed operating hours. In this activity the effect of synchronous condenser operation is operating patterns that utilize smaller guide vane openings with the same Head and discharge and stable turbine rotation, which is directly related to the rate of corrosion of the pits and the cavitation phenomenon in the French turbine runner because. To find out how much corrosion rate can be seen from the value of heavy metal turbine losses and blade thickness per 8000 operating hours since Annual Inspection 2011 -Anual Inspection 2017. Corrosion rate indicators are seen from the generator operating pattern, then actual guide vane openings, specific speed (Ns) and cavitation coefficients (?). From calculation results, weight / year material losses, maximum depth cavitation to runner wear rates per The biggest 8000 hours occurred during Annual Inspection 2017, which was 5.16 Kg / year, 9.24 mm and 6.18 Kg. While the Ns value decreased from AI 2011-2017 on the guide vane openings of 20% -60%. More specific speeds low of the specific speed of design affects the value of the cavitation coefficient} }