The International Fusion Materials Irradiation Facility (IFMIF) will count on a world leading accelerator to mimic the neutronic conditions of the first wall in future fusion demonstration and commercial power plants. The role of F4E is to coordinate the European activities supported by the voluntary contributions of Belgium, France, Germany, Italy, Spain and Switzerland. F4E’s main responsibilities are the integration and follow‐up of the activities conducted by the European groups working on the prototype accelerator, the test facility and the target facility. The prototype systems have to be designed, manufactured, installed, commissioned and tested in order to validate the newly developed features. 

Following months of preparatory work, the installation activities for the Linear Prototype Accelerator (LIPAc) have now started with the set-up of the deuteron injector. This was designed and manufactured at CEA Saclay, one of the voluntary contributions from France to the IFMIF/EVEDA project. The injector, whose target was to generate a 140 mA deuteron beam at 100 keV, passed the acceptance tests and was then shipped to Rokkasho, Japan. In mid-November a joint team of European and Japanese engineers unpacked the injector components and proceeded with the pre-installation activities under the guidance of Raphael Gobin and Patrick Girardot, experts from CEA. The first phase was completed at the end of last year and the installation phase has been initiated under the monitoring of F4E’s Broader Fusion Development Department based Garching, Germany. The aim is to complete the assembly of the accelerator components and begin testing by early 2017.

Source: F4E

CNIM Industrial Systems and SIMIC Spa have started manufacturing the first of the 70 radial plates that will support the superconducting cables of ITER’s Toroidal Field coils. The components will essentially confine the hot plasma with the help of powerful magnets. Each company will have to manufacture 35 radial plates that measure 14m by 9m. We visited the facilities of the two companies to find out how works are advancing.

CNIM’s building at its Brégaillon industrial site has been renovated, and a brand new 3000m² production hall has been constructed close to the sea, to facilitate the transportation of large items that will be manufactured. The new building is fully air-conditioned to enable equipment to be kept at a constant temperature during its final machining. Inside the building, a 36m by 9m portal machining centre stands out “ready to machine two radial plates simultaneously to a precision of several tens of microns”, as Jean-Claude Cercassi, CNIM Commercial Development Manager, confirms. Work is progressing fast at CNIM after the first batches of raw materials were delivered. “The stainless steel segments have been machined and we are about to start with the electron beam welding,” Cercassi explains. This is now possible thanks to the installation of a dismountable vacuum chamber.

SIMIC Spa has also built a new industrial building in Porto Marghera to accommodate the production of the radial plate prototype, with brand new facilities and tooling, in order to support the production of the radial plates. A massive portal machine has been installed, which will operate in addition to the existing one that was used for the machining of the prototype, to manufacture the 35 radial plates. Marianna Ginola, SIMIC Spa, explains that “the manufacturing phase of the radial plates is the most exciting part of our contribution to the project. Our new building is ready, new tooling is in place. The production of the radial plates has started! This is a turning point for the project because the design starts taking shape and the impressive milling machine that SIMIC has invested into is put to operation. Our expertise will be fully deployed to deliver these key components”.

The first radial plates are scheduled to be completed in July, when they will be transported by sea to La Spezia (Italy) to be fitted inside the ITER Toroidal Field coils at a facility run by ASG Superconductors. After producing a second radial plate five weeks later, CNIM and SIMIC Spa are expected to accelerate production to a rate of one plate every four weeks.

Source: F4E

The world’s biggest energy research project, the $20bn ITER nuclear fusion reactor, entered a key construction phase last month, as contractors began to pour 15,000 cubic metres of concrete into a pit in the south of France. It will house a huge doughnut-shaped machine, where scientists hope to tame the fusion reaction that powers the sun as a source of clean energy on Earth.

ITER is the standard bearer in a quest to generate power by fusing together the nuclei of hydrogen atoms, which dates back to the years after the second world war. This turned out to be far harder than it was to exploit fusion in explosive form in the H-bomb.

Because the potential benefits of fusion power are so great – it produces far less radioactive waste than nuclear fission (splitting heavy atoms such as uranium) and its raw materials are almost inexhaustible – the industrialised world has persisted in the costly quest, in the face of sceptics who claim that its commercial application will always lie half a century in the future.

The ITER project was born at the Geneva Superpower Summit in 1985, when Mikhail Gorbachev of the Soviet Union and Ronald Reagan of the US agreed to launch an international initiative aimed at developing fusion energy for peaceful purposes. The initial signatories to what was originally known as the International Thermonuclear Energy Reactor – Russia, the US, EU and Japan – were joined later by China, South Korea and India.

Conceptual design work began in 1988, followed by increasingly detailed engineering design phases until members approved ITER’s basic design in 2001. But it was then a reactor without a site. A battle over its location finally ended in 2005 with agreement to build ITER at Cadarache, near Aix-en-Provence.

Since construction started in 2010, the project has fallen further behind the original schedule for a variety of technical, contractual and financial reasons. Now the organisation expects to begin experiments in 2020, though fusion fuel – the heavy isotopes of hydrogen: deuterium and tritium – will not be fed into the reactor until 2027.

The plan is then to have a superheated “plasma” of reactants, burning at 150m degrees and generating 500MW of energy – comparable to a medium-sized power station – for several minutes at a time.

David Campbell, the project’s head of plasma operation, says: “Although there are a lot of uncertainties in fusion plasma physics and it will take some time to optimise conditions in the reactor, the work already done [in smaller experiments and computer modelling] makes me confident there are no show-stoppers to prevent us producing a few hundred megawatts of fusion power.”

The latest design changes – adding more magnetic coils inside the reactor to control the plasma and lining the vessel with metal (tungsten and beryllium) instead of carbon – are intended to smooth the way to its successful production of fusion energy.

Meanwhile, tests elsewhere are contributing invaluable data. The Joint European Torus or JET, an EU facility hosted by the UK Atomic Energy Authority at Culham, Oxfordshire, is the most important, because it is the world’s largest existing fusion reactor and the closest to ITER in design.

JET has been running for more than 30 years, but still has several years working life. Its greatest moment so far came in 1997 when it created a world record 16MW of fusion power in short bursts of up to a second.

Since then, experiments at JET have used non-reactive hydrogen to test plasma physics, systems and materials for ITER. But Steven Cowley, UKAEA chief executive, is looking forward to another power-generating run with deuterium-tritium fuel in two or three years. “We are planning to break our world record by sustaining a fusion output of perhaps 20MW for six or seven seconds,” he says.

The next step beyond ITER will be DEMO, a similar sized machine likely to be built in Asia. Its job will be to demonstrate sustained large-scale production of electric power and self-sufficiency in tritium fuel. If all goes well – politically and financially as well as technically – DEMO will be designed as ITER is running, in the hope that it could begin operations in the 2030s and feed fusion power into an electric grid in the early 2040s.

The ITER approach of magnetic confinement, confining the D-T fuel within an extremely powerful magnetic field, is the most generously funded fusion technology but not the only one. An alternative approach, called inertial confinement, involves focusing an array of ultra-powerful lasers or ion beams on a small pellet of D-T fuel – though its showcase, the US National Ignition Facility in California, is making progress more slowly than expected.

It remains to be seen whether fusion will confound the sceptics and meet what is likely to be a desperate need for clean, affordable power in the late 21st century. But the world’s leading industrial powers judge the prospect of success to be high enough to justify many billions of dollars further investment.

Source: Peak Oil

Nowhere was that conversation more stark than at a fusion experiment at the Massachusetts Institute of Technology, which was slated to be zeroed out altogether in the federal budget. The scientists began a spirited save-our-experiment campaign, but all appeared to be lost last year. The Alcator C-Mod experiment at MIT had stopped accepting new graduate students in 2012, and 70 employees were facing layoffs.

Those researchers, engineers, and technicians breathed a sigh of relief this week, with the unexpected news that the budget deal released by Congress Monday night included $22 million for the experiment, which had been slated to shut down completely. The goal of the experiment is to learn how to harness nuclear fusion—combining atoms—to produce energy.

With the flush of new funding, the experiment will run for its typical span, 12 to 14 weeks this year. No one will be laid off, according to Miklos Porkolab, director of the Plasma Science and Fusion Center where the project is housed. On Friday, the scientists will meet to talk about the experiments and the research schedule.

Porkolab said that the project had gone into survival mode. Layoffs that had been expected to take place in December were delayed when the Department of Energy gave MIT enough money for the researchers to maintain the experiment in a “warm shutdown” phase, at least until the budgetary situation was settled.

Although the funding announcement is great news for the project, it doesn’t resolve the larger problem—the project was treading water month-to-month. Even with the new funding, which ensures the experiment can continue until the end of the September, the reprieve is short on a scientific time scale.

“What we’d like to do is again resume bringing in more graduate students. At this funding level, we could do that. The only issue is what happens in 2015,” Porkolab said. “If we bring in students, they expect five years of support for a Ph.D.”

Porkolab said a significant number of new applicants for graduate school at MIT have expressed interest in plasma research, but that when the Obama Administration’s budget proposal for the next fiscal year is unveiled, it may not have set aside any money for the fusion experiment for next year.

“We may have to go through the same cycle again,” Porkolab said. The uncertainty, he said, takes its toll on the science, the ability to plan research projects, and the people who work on the experiment.