The purpose of the EUROMET project 297 was to compare the standardisation of 63-Ni and 55-Fe by liquid scintillation counting (LSC) and especially to test the main LSC activity measurement methods currently used in radionuclides metrology and exchange models and ideas on LSC. Eleven laboratories participated in thids action coordinated by LPRI, France.JRC.D-Institute for Reference Materials and Measurements (Geel