Replacement Scheme Design of Reserve Helium Circulator of 10 MW High Temperature Reactor

As one of the crucial innovations of 10MW high temperature reactor（HTR-10）,the current helium circulator using rolling bearings will be replaced by the reserve one using electromagnetic bearings.The feasibility of construction was certified by comparison between the two helium circulators and radiac measurement of the primary circuit.The construction schemes of inside vessel and outside vessel were proposed and simulated by 3-D digital emulation.The scheme of inside vessel was considered to be more feasible by comprehensive evaluation such as safety,difficulty and work amount.