Burnup measuring and positioning device applied to pebble-bed high-temperature reactor

The invention discloses a burnup measuring and positioning device applied to a pebble-bed high-temperature reactor, and relates to the technical field of reactor engineering. The pressure-bearing unit comprises a pressure-bearing box body and an end flange, an allocation space is formed in the pressure-bearing box body, and the end flange is connected to the opening side of the pressure-bearing box body; the rotor unit comprises a rotating shaft, a material taking disc and a material distributing disc, and the material taking disc and the material distributing disc are connected to the rotating shaft in a sleeving mode and installed in the allocation space; the lining unit comprises a first lining and a second lining, and the first lining and the second lining are connected to the material taking disc and the material distributing disc in a sleeving mode. The non-return unit is sleeved on the rotating shaft and is connected with the end flange; the bearing assembly comprises a first bearing and a second beari