Archive for fast reactors
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President Obama spoke about a renewed push for nuclear-based energy solutions in his SOTU speech, and Friday DOE Secretary Chu announced the appointment of the “Blue Ribbon Commission on America’s Nuclear Future.” The misnamed commission is supposed to provide “advice and make recommendations on issues including alternatives for the storage, processing, and disposal of civilian and defense spent nuclear fuel and nuclear waste.” I say misnamed because finding a solution to used fuel and waste is a big problem – but not the only big problem with the nation’s “Nuclear Future.”
To be sure, I am glad that the administration is acting quickly on its promise. But based on the commission’s makeup, I think the Obama/DOE strategy to a large extent is misdirected. The commission is being co-chaired by former Congressman Lee Hamilton and former National Security Advisor Brent Scowcroft. Other commissioners include some good people from science and academia, but it also has a lot of others who are there for window dressing.
I do get that such commissions have to be bipartisan and cover a range of science-policy/government-industry representatives. Also, I get that there are security aspects to both the inputs and wastes from reactors. But having both chairs be individuals closely tied with national security seems to me to send an odd and misguided message.
For a new generation of nuclear power facilities to be built, the biggest hurdle will be (and has been) a wide range of public fears. A recent Gallup poll showed that while support is growing, it is very tentative: 59% of Americans support nuclear power, but only 27% support it strongly. Support is also very divided by political affiliation and gender. And, despite all of the discusses over the past few years about finding new energy solutions, support for nuclear power has barely inched up from 2005 (54%). And, 63% say they oppose building a new nuclear facility in their area. In other words, the support for a nuclear resurgence could be easily shaken.
To move forward, besides a waste strategy, the administration is going to have to answer two other glaring questions for the public: Do we have the improved technology this time around? and Do we have an effective regulatory system in place given that some of the private operators proved to be unreliable or untrustworthy?
From a science and technology point of view, there are some promising developments, such as fast reactors, that need to be examined. If it turns out they are worthwhile, they need to be explained to the public by people that know what they are talking about, not government mouthpieces or PR staff. Unfortunately, it doesn’t appear that new commission is going to be going in that direction.
Besides Hamilton and Scowcroft, the commission has 13 other members (and you can probably tell who knows anything in particular about domestic nuclear energy generation and who doesn’t):
The commission will produce an interim report within 18 months and a final report within 24 months.
This video, produced by the Science Channel with the assistance of Argonne National Lab, discusses some of the work being done to perfect closed-cycle “fast” nuclear reactors. Nearly all reactors used for energy production are based on a light-water reactor model that are inefficient (fuel rods must be replaced after only 5% of the uranium-235 has been used) and create wastes with very long half lives.
Instead of using water, fast reactors employ a coolant – typically liquid sodium – that doesn’t slow down neutrons. The resulting “fast” neutrons have less tendency to be captured by uranium atoms and be converted to plutonium or higher actinides.
ANL’s fast reactors treat spent reactor fuel not as waste but as a rich source of recycled energy. Because they permit the reprocessing of spent nuclear fuel, fast reactors can operate through what is known as the “closed fuel cycle,” which dramatically increases the efficiency of uranium use and minimizes the discharge of plutonium and minor actinides as waste. A closed fuel cycle could - at least theoretically - use 90 percent of the energy available in uranium.