A boiler supplies steam to a turbine at 10 000 kPa and 600C. The turbine exhausts at 5.0 kPa. Natural gas with a heating value of 37.4 MJ/m3 at 15C and 101.3 kPa is supplied to the boiler at 588 m/min. The turbine drives a generator which produces 150 MW and is 90% efficient. If the plant consumes 3.2 MW, calculate the overall plant efficiency. Assuming a turbine efficiency of 82%, what is the steam flow rate from the boiler. (40.1%, 483 000 kg/h)