O maior projeto de fusão nuclear do mundo fracassa: ITER precisará de mais de uma década para implementar mudanças e tentar revolucionar a energia

World’s Largest Nuclear Fusion Project Fails: ITER Will Need Over a Decade to Implement Changes and Attempt to Revolutionize Energy

Written by Noel Budeguer

Published on 01/04/2025 at 19:02

Updated on 01/04/2025 at 19:03

O maior projeto de fusão nuclear do mundo fracassou antes da primeira ignição: ITER precisa de uma década para fazer mudanças e revolucionar a energia

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The Largest Nuclear Fusion Project in the World, ITER, Delays Its Inauguration to 2033. Design Changes and New Timelines Promise to Revolutionize Clean and Unlimited Energy Production

The ITER council has formalized a widely known secret: the world’s largest and most expensive nuclear fusion reactor, crucial for the future of energy, has delayed its inauguration by a decade. There is a new development plan, which includes significant design changes.

What Is ITER and How Can It Revolutionize Energy?

The International Thermonuclear Experimental Reactor (ITER) is a monumental scientific project of nuclear fusion, involving 35 of the largest economies in the world. The European Union contributes 40% of the funding, while China, India, Japan, South Korea, Russia, and the United States provide the remaining 60%.

The reactor is under construction in Cadarache, in southern France. It is based on the Tokamak design, a toroidal device that uses a powerful magnetic field to confine hot plasma at extremely high temperatures (about 150 million degrees Celsius), enabling the fusion of hydrogen nuclei and releasing clean and virtually unlimited energy.

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A New Timeline

An ambitious project faces all kinds of difficulties, and ITER has known for years that it would be unable to meet the goals of the plan set since 2016, neither in terms of deadlines nor budgets. However, it was only now that they decided to halt the snowball with design changes and a new reference plan.

The old plan aimed to complete the assembly of the reactor and achieve the first plasma in 2025, with a brief low-energy test. The new plan postpones this to 2033, but with a full-duration test to allow for a research operation phase starting in 2024.

The new plan also delays the attainment of full magnetic power from 2033 to 2036. And the start of the final operation phase from 2035 to 2039.

Design Changes

The new reference plan also provides the necessary time to implement changes in the reactor’s design. The most important change is that ITER will use tungsten instead of beryllium in the first wall, the one facing the plasma directly.

No fusion reactor uses beryllium, and ITER admits that this choice was a mistake. Tungsten is more relevant for future demonstration machines and commercial nuclear fusion devices in 2060.

Reasons for the Delay

In a press conference by the council, Pietro Barabaschi, the director-general of ITER, blamed the delay on:

The COVID-19 pandemic, which impacted the project with reduced personnel, factory closures, and delays in shipments and inspections
Issues with the availability of components and suboptimal quality in the reactor’s design
Internal cultural problems and an overly optimistic timeline for reactor assembly and plasma achievement

The new plan prioritizes the installation of critical components from the start and delays plasma attainment by almost a decade, but in exchange for a reactor better prepared for ITER operations.

Objectives and Challenges

The main objective of the ITER project is to achieve a fusion efficiency of Q≥10 over intervals of 400 seconds.

This means that the reactor will have demonstrated its viability if it can generate 500 MW of fusion thermal power using only 50 MW to heat the plasma. In the long term, ITER expects to achieve Q≥5 continuously.

The ITER complex began construction in 2013. The initial budget was around 6,000 million euros, but the total price is expected to exceed 22,000 million euros. Other estimates place the cost between 45,000 and 65,000 million dollars, making it one of the most expensive international projects in history.

Image | ITER

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World’s Largest Nuclear Fusion Project Fails: ITER Will Need Over a Decade to Implement Changes and Attempt to Revolutionize Energy

The Largest Nuclear Fusion Project in the World, ITER, Delays Its Inauguration to 2033. Design Changes and New Timelines Promise to Revolutionize Clean and Unlimited Energy Production

What Is ITER and How Can It Revolutionize Energy?

A New Timeline

Design Changes

Reasons for the Delay

Objectives and Challenges

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World’s Largest Nuclear Fusion Project Fails: ITER Will Need Over a Decade to Implement Changes and Attempt to Revolutionize Energy

The Largest Nuclear Fusion Project in the World, ITER, Delays Its Inauguration to 2033. Design Changes and New Timelines Promise to Revolutionize Clean and Unlimited Energy Production

What Is ITER and How Can It Revolutionize Energy?

A New Timeline

Design Changes

Reasons for the Delay

Objectives and Challenges

Engineers want to carve through Africa with a giant canal to bring water from the world’s second-largest river to a dying lake on the edge of the Sahara Desert that has already lost 90% of its water.

A giant brown band visible from space, approximately 8,850 kilometers long, connected Africa to America in the Atlantic Ocean, and satellites revealed that it is neither land nor pollution, but the largest accumulation of seaweed in the world, which broke records in 2025.

Instead of burning or burying old tires, an American city is transforming about 2,000 of them into the street itself, paving its first sections with a quieter and more durable rubber asphalt.

In just one cast, fishermen are surprised to capture 14,096 mullets in Bombinhas and close a historic season with 58,000 fish; scene recorded in the Santa Catarina paradise marks the last day of the 2026 season.

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