Fatigue is a major concern in the lifetime of wind turbine components and is one of the most important design parameters in wind power from a structural point of view. The fatigue life is influenced by the components residual stresses. To improve the fatigue life of wind turbine components, understanding and predicting residual stresses are of great interest.This projects aims to measure the residual stresses in cast wind turbine component with neutron scattering. Measured and modelled residual stresses will be compared to validate a method for predicting the residual stress of the cast steel components. The proposed experiment will be a first step in this project. The idea being to provide stress maps (profiles) on dedicated location for a critical component of the wind turbine.