Measurement of prompt gamma field above the VR-1 water level

Pool-type reactors are an excellent source of high energy photons without neutrons because the water above fuel acts as outstanding neutron shielding, whereas for photons, it is nearly transparent. The absence a valuable property essential testing semiconductor detectors they sensitive to neutrons, which might cause their damage. gammas worth studying responsible radiation induced heating reactor internal components in producing reactors, lead damage by void swelling. At this effect, helium produced (n,α) reactions influenced locally increased temperature clusters into bigger bubbles, increasing material volume, and therefore changing geometry internals. referred method could be utilized e.g. resource exploration detecting prompt capture gammas. gamma field was measured at VR-1 with two different cores levels. stilbene measurements showed relatively good agreement spectrum shape computed MCNP6.2. An important result confirmation that deconvolution matrix can used rotated crystal. measurement HPGe possibility such type geometry.