R. Panchal, GLN Srikanth, K. Patel, P. Shah, P. Panchal, R. Patel, G. Mahesuria, D. Sonara, N. Bairagi, A. Garg, R. Sharma, H. Nimavat, D. Christian, J. C. Patel, G. Singh, V. L. Tanna and S. Pradhan Upgradation of Integrated flow distribution and control system of SST-1 Institute for Plasma Research Near Indira bridge, Bhat, Gandhinagar-382428 E-mail: rpanchal@ipr.res.in ICEC26 – ICMC2016/10-O-6A-4 1 Date : March 10, 2016

Outline of Presentation Introduction PF coils behaviour in SST-1 Objectives of IFDCS upgradation 3S-2R cryo transfer line Valve sizing and selection Installation and commissioning of upgraded IFDCS Operation and control of upgraded IFDCS Results Conclusions ICEC26 – ICMC2016/10-O-6A-4 2 Date : March 10, 2016

SST-1 SCMS consists of TF and PF magnets being superconducting 16 TF coils with equal parallel flow path lengths of 48 m. 9 PF coils with different path lengths in the range of 67 – 130 m. Existing IFDC system has shown limitation since it has only one common valve at the return to control the flow in all the PF coils. During SST-1 Campaign, it was found that it is difficult to provide uniform cooling among the PF paths. Looking at the different hydraulic path lengths of individual PF coils, it is essential to group equal hydraulic path lengths to control more precisely to provide smooth cool-down of the PF superconducting coils. Therefore, it is mandatory requirement to upgrade the IFDC Introduction ICEC26 – ICMC2016/10-O-6A-4 3 Date : March 10, 2016

Existing IFDCS IFDCS links Helium plant to (Superconducting Magnet System) SCMS of SST1 Separate path for TF, PF and CASE Each path have ON/OFF valve at inlet and Control valve at outlet 1S-1R transfer line from Cold box to inlet of IFDCS 3S-3R transfer line from IFDCS to SST1 Provision for supply SHe to Bus duct and test chamber ICEC26 – ICMC2016/10-O-6A-4 4 Date : March 10, 2016

Existing IFDCS mimic ICEC26 – ICMC2016/10-O-6A-4 5 Date : March 10, 2016

PF Hydraulics Flow Distribution SST1 Campaign - 9 Temperature v/s Flow Experimental Data ICEC26 – ICMC2016/10-O-6A-4 6 Date : March 10, 2016

PF Hydraulics Flow Distribution Date & Time Pressure (BarA) Flow (g/s) PF Hydraulics Flow Distribution ICEC26 – ICMC2016/10-O-6A-4 7 Date : March 10, 2016 SST1 Campaign - 9 Pressure v/s Flow Experimental Data

PF coils temperature trend Thermal Runaway ICEC26 – ICMC2016/10-O-6A-4 8 Date : March 10, 2016

Objectives of IFDCS upgradation To redistribute the PF flow path for proper flow of cryogens and cool-down of PF coils To facilitate the reliable and uniform cooling of the PF coils system To avoid unwanted thermal runaway situation in the PF coils system To make the PF coils being Superconducting To provide balanced hydraulics with appropriate smart controls for ease of operation Objectives of IFDCS upgradation ICEC26 – ICMC2016/10-O-6A-4 9 Date : March 10, 2016

Helium Flow paths and Flow rate details of PF hydraulics Modified Grouping of PF Coils Group1: PF3(U) and PF3(L) :: ~67-84m each [17.84 g/s] Group2: PF1, PF2(U), PF2(L), PF4(U) and PF4(L) :: ~113m each [10.64 g/s] Group3: PF5(U) and PF5(L) :: ~130m [6.56 g/s] ICEC26 – ICMC2016/10-O-6A-4 10 Date : March 10, 2016

Outcome of feasibility study Three option to facilitate PF coils redistribution Replace existing IFDCS with new one (Costly) Separate chamber for PF only (No space) Modification in existing IFDCS Out of Three Option, Option 3 was most suitable Existing PF lines used for one of the group 13 top and bottom ports of SST1 used to connect with PF coils ICEC26 – ICMC2016/10-O-6A-4 11 Date : March 10, 2016

Process and Flow Diagram (PFD) of upgraded IFDCS ICEC26 – ICMC2016/10-O-6A-4 12 Date : March 10, 2016

Model of Interfacing 3S-2R Cryoline to SST-1 Cryostat 3S-2R transfer line Port No:13 IFDCS ICEC26 – ICMC2016/10-O-6A-4 13 Date : March 10, 2016

Valve sizing for IFDCS upgradation =0.025 bar Sr. No. Group Operating mass flow-rate in g/s Max. mass flow-rate in g/s rho in Kg/m3 Kv Cv Valve size Heat load for 600mm stem length 1 CV Group1 17.75 24.85 1.3 4.36 5.06 DN15 0.69 W (300K-4K) 2 CV Group2 10.5 14.7 2.58 2.99 3 CV Group3 7 9.8 1.72 2.00 DN10 0.42 W (300K-4K) 4 ON/OFF valve Group1 5 ON/OFF valve Group2 6 ON/OFF valve Group3 ICEC26 – ICMC2016/10-O-6A-4 14 Date : March 10, 2016

In-house development, testing, installation and commissioning of 3S-2R Cryoline for helium service Group Supply line size Return line size Group:1 PF3(U) & PF3(L) DN20 SCH 5S Group:2 PF5(U) & PF5(L) DN15 SCH 40S Group: 3 PF1, PF2(U) & PF2(L), PF4(U) & PF4(L) Existing PF lines Central Solenoid OD:15.87 mm, 1.65 mm thickness Return goes to CLs ICEC26 – ICMC2016/10-O-6A-4 15 Date : March 10, 2016

Testing of 3S-2R cryo transfer line at 300K and 80K Del P (mbar) Mass flow rate (g/s) ICEC26 – ICMC2016/10-O-6A-4 16 Date : March 10, 2016

IFDC Upgradation Installation ICEC26 – ICMC2016/10-O-6A-4 17 Date : March 10, 2016

3S-2R Cryo transfer line Installation ICEC26 – ICMC2016/10-O-6A-4 18 Date : March 10, 2016

MIMIC in SCADA for upgraded IFDCS operation and control ICEC26 – ICMC2016/10-O-6A-4 19 Date : March 10, 2016

Engineering commissioning of upgraded IFDCS Engineering commissioning includes, Leak test of Process lines with valves and IFDCS chambers Commissioning of Control and on/off valves with std. protocol Functionality check of control and on/off valves Simulation of Programmable Logic Controller (PLC) and SCADA program Testing of Pressure and flow transmitter with SCADA Temperature sensor with transmitter checked in PLC and SCADA Purge and evacuation of process lines ICEC26 – ICMC2016/10-O-6A-4 20 Date : March 10, 2016

Results: Temperature trend of PF coils with upgraded IFDCS ICEC26 – ICMC2016/10-O-6A-4 21 Date : March 10, 2016 PF inlet Pressure No Thermal Runaway

Conclusion The option of modification within existing IFDCS implemented and seems to be more economical, feasible and time saving solution. In house development of 3S-2R cryo compatible transfer line has made very important role in realizing the IFDCS upgradation. Successfully installed and commissioned cryo compatible control and on/off valves in IFDCS with process lines layout and proper flexibility provided. During recent SST-1 Campaign successfully operated upgraded IFDCS. No Thermal runaway observed during SST-1 Campaign. Appropriate precise control and valve adjustment provided in future SST1 operation to make PF coils superconducting. ICEC26 – ICMC2016/10-O-6A-4 22 Date : March 10, 2016

Thank You For Your kind attention ICEC26 – ICMC2016/10-O-6A-4 23 Date : March 10, 2016 CEC / ICMC 2011 JUNE 16, 2011