A flashed-steam geothermal power plant is located where underground hot water is available at 15 MPa and 300ºC. To produce a steam-water mixture in the separator where the unflashed water is removed, this water is throttled to a pressure of 1 MPa. The flashed steam which is dry and saturated passes through the steam collector and enters the efficiency is 80% and the generator efficiency is 95%. For a generator output of 12 MW, calculate the ground water flow rate in kg per hour required for continuous operation