Development of a prompt gamma neutron activation analysis facility for 10B concentration measurements at RA-3: Design stage

A PGNAA facility is being developed for 10B concentration measurements at RA-3 reactor. Its design targets detection limits better than tenths of microgram and irradiation times on the order of minutes. Computational models were developed, which estimated thermal neutron fluxes in irradiation position larger than 10^9 n·cm^(−2)s^(−1). Calculated amounts of photons and fast neutrons make necessary filter/moderator arrangements. An irradiation device was designed and numerically tested, which is being built and is to be used for performing characterizing measurements.