1. 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
ICEC26 – ICMC2016/10-O-6A Date : March 10, 2016

2. 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 Date : March 10, 2016

3. 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 Date : March 10, 2016

4. 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 Date : March 10, 2016

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

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

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

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

9. 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 Date : March 10, 2016

10. 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 Date : March 10, 2016

11. 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 Date : March 10, 2016

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

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

14. 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 Date : March 10, 2016

15. In-house development, testing, installation and commissioning of 3S-2R Cryoline for helium service
Group
Supply line size
Return line size
Group: PF3(U) & PF3(L)
DN20 SCH 5S
Group: PF5(U) & PF5(L)
DN15 SCH 40S
Group: 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 Date : March 10, 2016

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

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

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

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

20. 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 Date : March 10, 2016

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

22. 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 Date : March 10, 2016

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