The ITER tokamak will use three interconnected cooling systems. Most of the heat will be removed by a primary water cooling loop, itself cooled by water through a heat exchanger within the tokamak building's secondary confinement. The secondary cooling loop will be cooled by a larger complex, comprising a cooling tower, a 5 km pipeline supplying water from Canal de Provence , and basins that allow cooling water to be cooled and tested for chemical contamination and tritium before being released into the Durance River . This system will need to dissipate an average power of 450 MW during the tokamak's operation. A liquid nitrogen system will provide a further 1,300 kW of cooling to 80 kelvins , and a liquid helium system will provide 75 kW of cooling to K . The liquid helium system will be designed, manufactured, installed and commissioned by Air Liquide .