The 180 MW(e) Dartmouth turbine casing failed due to a water hammer transient in May 1990. This paper describes the failure of the turbine casing, which acts as a pressure vessel and was failed by the overload transient. The overload caused 12 separate low ductility failures at the stay vanes which form part of the pressure containment. This paper assesses the pressure transient in the turbine, the stress conditions which existed in the structure and outlines the fracture mechanics conditions of the failure.
|Number of pages||8|
|Journal||International Journal of Pressure Vessels and Piping|
|Publication status||Published - 1998|