Abstract
The thermo-hydraulic analysis shows that a total of 300 g/s supercritical helium (SHe) flow is required for the superconducting magnet system (SCMS) of steady state superconducting tokamak, SST-1, including the bus lines to keep sufficient temperature margin of the conductor. The heat received from the SCMS is removed from the circulating SHe through a heat exchanger placed in the main control dewar (MCD). SHe flow distribution among different paths of SCMS has been optimized on the basis of steady state as well as pulsed heat load as per required stability margins of the coils. An integrated flow distribution and control (IFDC) system has been designed, fabricated, installed and tested to control the flow rate in SCMS. The IFDC system has been designed also to take care for safe handling of cryogen following quench in SCMS. The paper describes the cooling scheme of SCMS with the refrigerator/liquefier (R/L) and the role of IFDC system toward all operational modes of SCMS with the R/L.
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