Turbine assembly and method for assembling a turbine

A method for assembling a turbine, the method comprising:

• coupling a first member to a second member to form a seal assembly, the first member and second member having different rates of thermal expansion;
• positioning the seal assembly in an axial recess in an outer stationary component;
• and
• positioning an inner stationary component radially inside the outer stationary component, where a first key feature on the inner stationary component is received by a second key feature in the outer stationary component, the axial recess being located in the second key feature, the seal assembly positioned between the first and second key features to reduce fluid flow in a substantially radial direction between the first and second key features.

A turbine assembly comprising:

• a first stationary component;
• a second stationary component positioned radially outside the first stationary component;
• a first key feature on the first stationary component configured to mate to a second key feature on the second stationary component;
• and
• a seal assembly positioned between the first and second key features to reduce fluid flow between the first and second key features, the seal assembly comprising:
• a first member;
• a second member within the first member, the second member having a higher rate of thermal expansion than the first member;
• and
• a latch feature coupled to the first member configured to expand the seal assembly from a compressed state to an expanded sealing state when the seal assembly is subject to an elevated temperature, wherein the expanded sealing state causes the seal assembly to contact substantially parallel radial surfaces on the first and second key features and to reduce flow in a radial direction.