초록 ▼

The steam turbine includes the high-and-intermediate pressure turbine of the single flow type, the intermediate-pressure turbine of the single flow type, and the steam passage that communicates a location on a part way of the steam flow inside the high-and-intermediate pressure turbine, to the steam

The steam turbine includes the high-and-intermediate pressure turbine of the single flow type, the intermediate-pressure turbine of the single flow type, and the steam passage that communicates a location on a part way of the steam flow inside the high-and-intermediate pressure turbine, to the steam inlet of the intermediate-pressure turbine. The high-and-intermediate pressure turbine includes the high-pressure part on the steam inlet side and the intermediate-pressure part on the steam outlet side. The steam passage feeds a part of the steam having passed through the high-pressure part, from the location between the high-pressure part and the intermediate-pressure part, to the intermediate-pressure turbine.

대표청구항 ▼

1. A method for operating a steam turbine, the steam turbine comprising a single flow high-and-intermediate pressure turbine, the high-and-intermediate pressure turbine having a high-pressure part and an intermediate-pressure part on a downstream side of the high-pressure part;a single flow intermed

1. A method for operating a steam turbine, the steam turbine comprising a single flow high-and-intermediate pressure turbine, the high-and-intermediate pressure turbine having a high-pressure part and an intermediate-pressure part on a downstream side of the high-pressure part;a single flow intermediate-pressure turbine; anda low-pressure turbine,the high-and-intermediate pressure turbine, the intermediate-pressure turbine, and the low-pressure turbine being disposed between a steam inlet and a steam outlet,the method comprising: expanding a steam supplied through the steam inlet of the high-and-intermediate pressure turbine in the high-pressure part;branching a flow of the steam having passed through the high-pressure part into a flow of a first steam and a flow of a second steam;expanding the first steam in the intermediate-pressure part of the high-and-intermediate pressure turbine;leading the second steam into the intermediate-pressure turbine so as to expand the second steam in the intermediate-pressure turbine; andleading the first steam having passed through the intermediate-pressure part and the second steam having passed through the intermediate-pressure turbine into the low-pressure turbine. 2. A steam turbine comprising: a single flow high-and-intermediate pressure turbine configured to have a steam stream fed through a steam inlet to a steam outlet via a high-pressure part and a downstream intermediate-pressure part within the high-and-intermediate pressure turbine;a single flow intermediate-pressure turbine;a steam passage configured to communicate a location between the high-pressure part and the intermediate-pressure part of the high-and-intermediate pressure turbine to an inlet of the intermediate-pressure turbine;a low-pressure turbine; anda steam line configured to communicate a steam inlet of the low-pressure turbine to the steam outlet of the high-and-intermediate pressure turbine and a steam outlet of the intermediate pressure turbine,wherein the steam passage is configured to feed a part of the steam having passed through the high-pressure part of the high-and-intermediate pressure turbine to the intermediate-pressure turbine, andwherein the steam line is configured to feed the steam having passed through the intermediate-pressure part of the high-and-intermediate pressure turbine and the steam having passed through the intermediate pressure turbine to the low-pressure turbine. 3. The steam turbine according to claim 2, wherein the high-and-intermediate pressure turbine and the intermediate-pressure turbine are housed in a common casing. 4. The steam turbine according to claim 3, wherein the steam passage is disposed inside the common casing. 5. The steam turbine according to claim 3, wherein the steam passage is disposed at least partially outside the common casing. 6. The steam turbine according to claim 5, further comprising a moisture separation device disposed in the steam passage outside the common casing and being configured to separate moisture of the steam streaming through the steam passage. 7. The steam turbine according to claim 6, further comprising: a heating device disposed in the steam passage outside the common casing and being configured to heat up the steam streaming through the steam passage. 8. The steam turbine according to claim 2, wherein the steam turbine further comprises a moisture separation device disposed in the steam passage, and being configured to separate moisture of the steam streaming through the steam passage. 9. The steam turbine according to claim 8, wherein the steam turbine further comprises a heating device disposed in the steam passage, and being configured to heat-up the steam streaming through the steam passage. 10. The steam turbine according to claim 2, wherein the steam turbine is configured to enable a flow rate of the steam streaming through the intermediate-pressure part in the high-and-intermediate pressure turbine to be approximately equal to a flow rate of the steam streaming through the intermediate-pressure turbine. 11. The steam turbine according to claim 2, wherein the high-and-intermediate pressure turbine and the intermediate-pressure turbine are arranged to be on a same axis; andthe high-and-intermediate pressure turbine is configured so as to enable a direction of a steam flow to be opposite to a direction of a steam flow in the intermediate-pressure turbine. 12. The steam turbine according to claim 2, wherein the high-and-intermediate pressure turbine and the intermediate turbine are disposed on a same axis such that a direction of a steam flow in the high-and-intermediate pressure turbine is opposite to a direction of a steam flow in the intermediate-pressure turbine, andwherein the steam turbine further comprises a dummy disposed on the same axis between the high-and-intermediate pressure turbine and the intermediate turbine and being configured to reduce total thrust force acting on the high-and-intermediate pressure turbine and the intermediate turbine. 13. A power plant comprising: a steam turbine; anda generator configured to be driven by the steam turbine to produce power,wherein the steam turbine comprises:a high-and-intermediate pressure turbine of a single flow type in which a steam stream fed through a steam inlet to a steam outlet via a high-pressure part and a downstream intermediate-pressure part within the high-and-intermediate pressure turbine;an intermediate-pressure turbine of a single flow type;a low-pressure turbine; anda steam line configured to communicate a steam inlet of the low-pressure turbine to the steam outlet of the high-and-intermediate pressure turbine and a steam outlet of the intermediate pressure turbine,a steam passage that communicates a location between the high-pressure part and the intermediate-pressure part of the high-and-intermediate pressure turbine to an inlet of the intermediate-pressure turbine,wherein a part of the steam having passed through the high-pressure part of the high-and-intermediate pressure turbine is fed to the intermediate-pressure turbine via the steam passage, andwherein the steam line is configured to feed the steam having passed through the intermediate-pressure part of the high-and-intermediate pressure turbine and the steam having passed through the intermediate pressure turbine to the low-pressure turbine. 14. The power plant according to claim 13, further comprising a nuclear reactor configured to generate the steam to be fed to the high-and-intermediate pressure turbine, wherein the steam turbine further comprisesa low-pressure turbine configured to be supplied with the steam having passed through the intermediate-pressure part of the high-and-intermediate pressure turbine, andthe steam having passed through the intermediate-pressure turbine.