India’s contribution to ITER Cooling Water System enters commissioning phase

08-Feb-2022
Image of Cooling Water System

The heat generated in the ITER Tokamak along with the heat generated by auxiliary heating systems and supporting systems (approximately 1150 MW) will be transferred to the atmosphere with the help of Cooling Water System (CWS). The CWS consists of four sub-systems, viz. Tokamak Cooling Water System (TCWS), Component Cooling Water System (CCWS), Chilled Water System (CHWS) and Heat Rejection System (HRS). Among these sub-systems, the supply of CCWS, CHWS and HRS is part of India’s in-kind contribution to ITER project as one of the nine procurement packages. 

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Power Supplies

Multi-Megawatt Power Supplies

Multi-Megawatt Power Supplies

This package includes power supplies for:

  • Diagnostic neutral beam : 10 kV, 140 A extraction power supply, 90 kV 70 A acceleration power supply for the diagnostic neutral beam source, 200 kW 1 MHz RF generators, 4 nos. and a 10 kV 60 A power supply for the electrostatic residual ion dump
  • The ICRH system : Driver stage 8-18 kV 250 kW and end stage 27 kV 2.8 MW power supplies Electron Cyclotron Emission (ECE)
  • The ECRH system: 55 kV, 5.5 MW power supply

 

The developments include:

Cryogenic System

Cryogenic System

The cryogenic requirements of ITER include a network of 4 km cryolines and 7 km warm lines together with 9 cryodistribution boxes. This network transfers cryogens from cryoplants of capacities 75 kW @ 4.5 K and 1 MW @ 80 K.

Some Diagnostics

Some Diagnostics

The Diagnostic Package includes India's participation in:

  • X-Ray Crystal Spectroscopy (XRCS) : Set of spectrometers (X-ray crystals, Detectors , Vacuum chamber), Calibration source, Instrumentation & Control (I&C)
  • Electron Cyclotron Emission (ECE) : Set of Michelson Interferometers & Radiometers, Polarization splitter unit, Transmission line, Calibration source, Instrumentation & Control (I&C)
  • CXRS : Optical Fibers, Visible Spectrometers, Detectors, opto-mechanical components

Diagnostic Neutral Beam System

Diagnostic Neutral Beam System

The ITER diagnostic neutral beam (DNB) is to be used to diagnose He ash content of the ITER plasma during its DT operation phase using the CXRS diagnostic technique. The measurements shall be performed using a 100 keV 20 A neutral hydrogen beam. The measurements are performed at 21 m from the place where the beam is produced. It uses the step of ion beam production, acceleration, neutralization and charge separation to achieve the desired beam parameters.

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