It's purpose certainly is to demonstrate net positive energy production. https://en.m.wikipedia.org/wiki/ITER https://en.m.wikipedia.org/wiki/ITER Thereby the

It's purpose certainly is to demonstrate net positive energy production. https://en.m.wikipedia.org/wiki/ITER https://en.m.wikipedia.org/wiki/ITER Thereby the machine aims to demonstrate, for the first time in a fusion reactor, the principle of producing more thermal power than is used to heat the plasma. The total electricity consumed by the reactor and facilities will range from 110 MW up to 620 MW peak for 30-second periods during plasma operation.[6] Being a research reactor,[3] thermal-to-electric conversion is not intended, and ITER will not produce sufficient power for net electrical production. Instead, the emitted heat will be vented.