procurement of different spares of main turbine of 500mw set at sgtpp, wbpdcl , fitted key, p / n-38-journal brg d250x180 for 500mw turbine bhel drg. no-01160418000, var-00 , fitted key, p / n-12- radial thrust brg for 500mw turbine ( for bearing size-d380x290 ) , bhel drg. no-01170327000, var-00 , fitted key, p / n-36-journal brg d500x450 for 500mw turbine bhel drg. no-01181402000, var-00 , fitted key, p / n-7, lp casing assembly, for 500mw turbine drg no.-01074441500, var-00 , parallel keys ( hp casing assy ) , item-17 for hpt of main turbine of 500mw set bhel drg.no-01050109000, var-00 , screw hex -hp casing assly, p / n-54 bhel drg. no-01050109000, var-00 for 500mw set , screw hex am24x90 ( hp shaft seal rear ) for main turbine of 500mw set item no-3, bhel drg.no-01050609000, var-00 , spacer - ip casing assy, for 500mw ip turbine bhel drg no - 01062536000, var-00, p / n 17 , sliding plate, p / n-5-ip-lp pedestal for 500 mw turbine bhel drg. no-01183141000, var-00 , balancing weight, high density, s=41-wha bhel item no 01, drg no 81020127001for lp shaft , sealing strips 7.5x467 ( hp shaft seal fr ) for hpt of main turbine of 500mw set for front side, item no-20, bhel drg. no-01050509000, var-00 => limited