Blade Fracture Accident Analysis of Helium Turbine For HTR-10GT

摘要

Blade fracture of turbine is the severe accident for helium turbine system coupled with HTGR. A model was established and the consequences of turbine blade fracture were investigated. 1. Blade fracture would vastly increase the mass flow rate in turbine and reach its peak quickly, then it would decease and stabilize in a quite high value if the helium turbine system connected with power grid. Meanwhile, the mass flow rate in other components would also increase. 2. The results indicated that disconnecting helium turbine system from grid was an effective measurement to mitigate the accident consequences of turbine blade fracture. It can reduce the mass flow rates, rotor's rotating speed and decrease the reactor power.