SM-3 reactor core: 1 – shim rod tube sockets; 2 – automatic controller tube socket; 3 – support grid lower plate; 4 – cladding integrity monitoring tube; 5 – support grid rack; 6 – automatic controller tube; 7 – FA sockets; 8 – support grid upper plate; 9 – beryllium blocks; 10 – FA sockets; 11 – cladding intregrity monitoring tubes; 12 – central trap; 13 – CTTA beryllium inserts; 14 – reflector hold-down grid; 15 – working FA; 16 – vessel; 17 – reactor vessel shield; 18 – FA storage No. 1.