The National Center for Scientific Research “Demokritos” (CNRD) has developed specific facilities and methodology for the radiological characterization of nuclear materials! Indeed, nuclear fusion research requires the investigation of the radiological properties of ITER material samples after neutron irradiation, the validation of neutron streaming and material activation calculations at positions close and far from the plasma source and finally the development of a new  activation detector for neutron fluence measurements and spectrum evaluation in the breeding blanket of future fusion power plants. Radiation measurements of materials, in conjunction to radiation transport simulations, are available at their lab for use in nuclear, environmental, industrial and medical applications, where accurate non-destructive measurements of radioactivity in samples of up to several liters in volume are required.