Small Angle Neutron Scattering (SANS) is performed to analyse the microstructural state of reference CuCrZr material with carefully controlled heat treatments, small-scale manufacturing mock-ups of assemblies and high-heat-flux exposed mock-ups. The information derived from the SANS data corresponds well to existing literature data based on microscopic scale techniques. The manufacturing method as well as high-heat-flux testing conditions are confirmed to have little impact on the microstructural properties. The work also demonstrates that SANS can be used for millimetre-scale analysis of small engineering components with minimal surface preparation.