PERHITUNGAN PERFORMA HIGH PRESSURE HEATER #1 TIPE SHELL AND TUBE DI UNIT 2 PLTU 1 JAWA TIMUR PACITAN PADA BEBAN 200 MW ( CALCULATION PERFORMANCE OF HIGH PRESSURE HEATER #1 TYPE SHELL AND TUBE IN UNIT 2 PLTU 1 JAWA TIMUR PACITAN ON 200 MW LOAD ) - Priyangga, Riwi Narotama (2014)