| 摘要 |
PURPOSE:To achieve quick staring by providing a nozzle boxes in the downstream of regulation valves for superhigh and high pressure turbine sections while providing bypath system and vacuum system respectively. CONSTITUTION:A nozzle box 91 is provided in the downstream of regulation valve 81 for super high turbine section 3 to be coupled to a steam generator 1 while a nozzle box 92 is provided in the downstream of regulation valve 82 of high pressure section 4 to be coupled to first reheater 21. While a bypath system having VHP bypath valve 131 is provided between the steam inlet and outlet pipings of super high pressure section and a vacuum system having VHP ventilator valve 141 is provided in the outlet piping. Similarly, HP bypath valve 132 and HP ventilator valve 142 are provided to the high pressure section 4. Since the super high and high pressure section can be started independently, quick starting is achieved. |
