i have just installed a new mini power plant, designed to generate 10kW, operated at 9 bar pressure and 1 bar pressure after expanded by turbine. the steam is operated in saturated vapor condition.

Last week, the plant was trying to operate. First, the plant was starting up until it reached 9bar, the valve was closed in starting time. Then, after the pressure reached, valve was opened and the system operate. But suddenly, the pressure drop about 2bar in a minute. And continue dropping. After 10minutes, the pressure dropped until 1,5bar. And no power generated anymore.

Would you mind helping to find the causes of this condition?
assume: there were any leakages in a system.