Main shaft of Primary Circuit Sodium Pump for Prototype Fast Breeder Reactor.
Size: 700 mm diameter x 11 meter long
Critical Requirement: Position accuracy within 0.5 mm
Made from three parts, two solid forgings about 3.5 meters long and one hollow forged pipe about 5 meters long, at the centre
Shaft to be dynamically balanced at 600 rpm
Reconditioning and calibration of lathe to deliver 50 microns over 12 meter length.
Development of line boring 650 mm ID x 5 meter long and honing of centre piece
Optical alignment and welding of 3 pieces together within 2 mm over 12 meter length.
Development of machining process, parameters to deliver accuracy of 50 microns over entire 12 meter length.
Bearing diameter grinding
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Prashant (Godrej)
, Mumbai Harbour, Maharashtra, India
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