Speaker: Danas Ridikas (CEA Saclay)

Feasibility Study of New Microscopic Fission Chambers Dedicated for ADS

In the frame of the MegaPie project we propose to measure the neutron flux inside the molten 1 MW Pb-Bi target at PSI (Switzerland). For this purpose a new type of microscopic fission chambers, developed for on-line measurements of the actinide incineration rates in the high neutron fluxes, will be placed in the central rod of the Pb-Bi target to determine both thermal and fast components of the neutron spectra. In addition to the neutron flux measurements in absolute value, both time- and space-dependent variations of it will be monitored on-line with a precision better than 10%. In this work we show that these measurements are feasible.