Following the Generation IV International Forum, interest in advanced reactor systems based on liquid metal cooling increased significantly in the last years. This has led to a greater demand for deterministic tools that can guarantee reliable results at a low computational cost. The ECCO cell code, adopted by the newcleo company for the design of its LFR units, produces condensed and homogenised cross sections for subsequent core calculations in ERANOS. Although ECCO was extensively validated for sodium fast reactor applications in the past, more limited studies have been carried out so far for lead fast reactors. The same applies to the generation of the input nuclear data libraries for the ECCO code.