Patent ID: 8591180

Claim:
A steam turbine diaphragm assembly comprising: an inner diaphragm ring segment; an outer diaphragm ring segment; a static nozzle blade positioned between the inner diaphragm ring segment and the outer diaphragm ring segment; a first cavity between the static nozzle blade and the inner diaphragm ring segment; wherein the inner diaphragm ring segment includes a first aperture fluidly connected with the first cavity, wherein the first aperture includes an inlet at a radially inward surface of the inner diaphragm ring segment and an outlet at a outward surface of the inner diaphragm ring segment; and a second cavity between the static nozzle blade and the outer diaphragm ring segment; wherein the outer diaphragm ring segment includes a second aperture fluidly connected with the second cavity, wherein the second aperture includes an inlet at a radially outward surface of the outer diaphragm ring segment and an outlet at a radially inward surface of the outer diaphragm ring segment, and wherein the inlet and the outlet of the first aperture are fluidly separated from the inlet and the outlet of the second aperture.