| 摘要 |
PURPOSE:To enable to exhaust abnormal evaporation gas without affecting the adverse influence to a spiral recovery tube side by exhausting the gas directly from the tube while regulating an emergency safety valve. CONSTITUTION:An abnormal evaporation gas exhausting unit is formed of a direct recovery tube 31 connected with a coolant storage tank 2 in parallel with a spiral recovery tube 22 in a hollow rotary shaft 11, and an adjustable emergency safety valve 32 provided at the exterior of a helium supplying and exhausting unit 17. The abnormal evaporation gas can be exhausted while regulating the valve 32 without adverse influence to the tube 22 side. |
