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World’s biggest experimental nuclear fusion reactor launched in Japan (www.theguardian.com)

submitted 11 months ago by [email protected] to c/[email protected]

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Joint project with EU involves more than 500 scientists and engineers and more than 70 companies

The world’s biggest operational experimental nuclear fusion reactor – a technology in its infancy but billed by some as the answer to humanity’s future energy needs – has been inaugurated in Naka, Japan.

Fusion differs from fission, the technique used in nuclear power plants, by fusing two atomic nuclei instead of splitting one.

The goal of the JT-60SA reactor is to investigate the feasibility of fusion as a safe, large-scale and carbon-free source of net energy – with more energy generated than is put into producing it.

The six-storey-high machine, in a hangar in Naka, north of Tokyo, comprises a doughnut-shaped “tokamak” vessel set to contain swirling plasma heated up to 200mC (360mF).

It is a joint project between the European Union and Japan, and is the forerunner for its big brother in France, the under-construction International Thermonuclear Experimental Reactor (ITER).

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[–] [email protected] 1 points 11 months ago (2 children)

Researchers at ITER, which is over budget, behind schedule and facing major technical problems

Sounds promising

[–] [email protected] 1 points 11 months ago

as megaprojects expert Bent Flyvbjerg explains in the following article, these grandiose projects operate by an iron law: over budget, over time, over and over again

Performance data for megaprojects speak their own language. Nine out of ten such projects have cost overruns. Overruns of up to 50 percent in real terms are common, over 50 percent not uncommon. Cost overrun for the Channel Tunnel, the longest underwater rail tunnel in Europe, connecting the UK and France, was 80 percent in real terms. For Boston’s Big Dig, 220 percent. The Sydney Opera House, 1,400 percent. Similarly, benefit shortfalls of up to 50 percent are also common, and above 50 percent not uncommon.

https://www.cato.org/policy-report/january/february-2017/megaprojects-over-budget-over-time-over-over

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