Consideration on Improvement of Failed Fuel Separator Roller in High Temperature Gas-Cooled Reactor

Since the existing high-temperature gas-cooled reactor failed fuel separator roller adopts a straight-toothed rack, and the redirecting teeth are embedded on the rack, the fuel balls will collide when passing through the redirecting teeth, which is easy to cause the fuel balls to be damaged, and cause the device to vibrate; At the same time, the structure can not ensure that all unqualified fuel balls are sorted out, and the detection rate is uncontrollable. In this paper, the roller of the failed fuel separator is improved by adopting a spiral V-shaped groove self-disturbing roller; the structure principle of the roller is described, the curved surface equation of the V-shaped groove of the roller is given, and the scanning trajectory of the fuel ball is simulated. The improvement results show that the fuel balls can adjust their posture by themselves, which can achieve the purpose of stable operation, high detection rate and avoiding collision. It is worthy to be popularized and applied in this reactor type.