Microdosimetry Study of Radiobiological Facilities at the RSV - Tapiro Reactor

The standard irradiation facility of the RSV-Tapiro fast reactor at ENEA Casaccia consists of a vertical channel of 10 cm diameter through which biological samples can be shipped down near to the reactor core. A new irradiation facility was designed by extracting laterally the thermal column to enable irradiation of larger matrices. Microdosimetric measurements were performed using a Rossi counter (d = 2 µm) to provide a quantitative assessment of radiation quality for both facilities. The lineal energy spectra were also computed using calculated neutron fluence spectra to compare the influence of different energy components, and extend the microdosimetric data to simulated diameters of 1-0.3 µm.