nuclear-news

The nuclear fusion dream – ever elusive

Fusion: Maybe Less Than 30 Years, But This Year Unlikely Bill Chameides Dean, Duke University’s Nicholas School of the Environment, August 2012 No ignition at the U.S. National Ignition Facility , home to the world’s largest laser….. Scientists have been thinking about how to bring this game changer into the energy game for decades. (See fusion/fission timeline .) As far back as 1946, two British scientists — Sir George Paget Thomson and Moses Blackman — filed the first patent for a fusion power plant .

But there have been a couple of hold-ups . To get a fusion reaction started, you need to slam the hydrogen atoms together really, really hard and that requires a lot of energy. (In a hydrogen bomb, the fusion reaction gets ignited by an atomic bomb, using fission. Not exactly the preferred method for your local fusion power plant.)

Even trickier is controlling the fusion reaction. It’s one thing to make a fusion bomb, it’s a lot harder to get the reaction going and keep it under control in a way that the amount of energy extracted is larger than that expended to initiate and manage the reaction.

Over the almost 70-year pursuit of the fusionary holy grail, it’s been fairly common for scientists working on the problem to say that they’re about 30 years away from achieving a power plant based on fusion. (See here  and here .) The problem has been that while time has marched on, the 30-year horizon has remained fixed. Suffice to say it has proven to be a very tough problem…. http://www.huffingtonpost.com/bill-chameides/fusion-maybe-less-than-30_b_1949573.html

October 10, 2012 - Posted by Christina Macpherson | Reference, technology, USA