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France’s latest green idea: underwater nuclear reactors

By | January 20, 2011, 11:50 PM PST

Among the array of viable alternative energy options, nuclear power hasn’t been getting much love from the eco-conscious community. But in France, the technology has become the hands-down way to go green.

For instance, officials at DCNS, a naval company that services the French government, have announced plans to develop a nuclear reactor that will operate offshore and sit somewhere along the ocean floor. Protected inside a cylinder roughly the length of a football field, the proposed “Flexblue” reactor would be capable of producing up to 250 megawatts of energy –  enough to power a million homes.

The news is hardly surprising for a country that gets 80 percent of its electricity from nuclear reactors, according to the TV news program 60 Minutes.

Company executives say that the reactor’s design coupled with the concept of storing it 300 feet below the sea should ease some of the safety qualms people have with nuclear power plants. Scheduled for installation in 2016, the reactor will be able to withstand natural disasters like earthquakes, tsunamis, and floods, according to CEO Patrick Boissier’s interview with the online publication Platt.

He also mentions that it will be far less vulnerable to terrorist attacks than a land-based nuclear reactor, with the added benefit of the ocean as a built-in coolant.

Although these relatively portable reactors can’t compete with large-scale nuclear power plants that supply upwards of 1,200 megawatts of energy to the power-hungry masses, they are much lighter on the wallet. Compared to nuclear power complexes that can require a hefty investment of three to five billion dollars, the estimated cost for one small modular reactor that delivered 25 megawatts of energy, according to an article in IEEE Spectrum magazine, was around 50 million dollars.

While concerns about the technology remain, the potential for significant savings, experts say, can at least sway more people to give nuclear power a closer look.

Photo: DCNS

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Tuan C. Nguyen

About Tuan C. Nguyen

Tuan C. Nguyen was a contributing editor for SmartPlanet from 2011 to 2013.

Tuan C. Nguyen

Tuan C. Nguyen

Contributing Editor

Tuan C. Nguyen is a freelance science journalist based in New York City. He has written for the U.S. News and World Report, Fox News, MSNBC, ABC News, AOL, Yahoo! News and LiveScience. Formerly, he was reporter and producer for the technology section of ABCNews.com. He holds degrees from the University of California Los Angeles and the City University of New York's Graduate School of Journalism.

Follow him on Twitter.

Tuan C. Nguyen

Tuan C. Nguyen

Tuan C. Nguyen does not hold any investments in the technology companies he covers.

He writes for SmartPlanet and is not an employee of CBS.

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+1 Vote
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RE: France's latest green idea: underwater nuclear reactors
I have a business model that will make the cost of such tech, no cost to the buyer.

Need a partner to help implement. Or, any companies to contact me directly.

Thomas Adair
thomasadair@live.com
Posted by riskfreeinvesting
21st Jan 2011
+1 Vote
+ -
What about security?
Just because it's inconvenient to physically access, doesn't mean
it's impossible. What if a terrorist attack or natural disaster occurs?
What is the environmental impact of radioactive material on sea
water and its inhabitants?
Posted by Bit-Smacker
21st Jan 2011
+1 Vote
+ -
RE: France's latest green idea: underwater nuclear reactors
Immediate questions: Maintenance? Access?
By the way, 250 Megawatts of power (not energy).
Posted by duaine@...
21st Jan 2011
+1 Vote
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RE: France's latest green idea: underwater nuclear reactors
I like the idea, but don't kid yourself about it being less vulnerable
to earthquakes (many of which have epicenters off shore),
though structurally, as long as it is not attached to the sea floor, it
won't be cracked and/or torn apart like a land based structure. As
for vulnerability relative to Tsunamis, it depends on how the
Tsunami is generated, as well as other factors. When the big on
occurred in 2005 in Southeast Asia, the cause was a fault line
600+ miles long, which shifted upwards approximately 23 feet.
This generated a wave, which went all the way from the bottom of
the ocean to the surface. Thus a similar causal factor would
potentially impact this technology. There are also phenomenon
known as Turbidity Current (think underwater land slide), which
can wreak havoc on technology, as do freak currents associated
with storm surges. As for a cataclysmic failure of the containment
vessel, I would rather have it happen in the ocean than on land
anytime. It would not be great if it happened, but the overall
impact on life and property would be minimized compared to a
similar breakdown on land.
Posted by PSFTGURU@...
21st Jan 2011
+1 Vote
+ -
RE: France's latest green idea: underwater nuclear reactors
With the added benefit that when these Nuclear power plants reach their EOL, we just unplug from it and walk away...nobody will know that the plant is down there, slowly rusting away...and we won't need to dispose of the spent fuel!
Posted by tech_ed@...
22nd Jan 2011
+1 Vote
+ -
A few flaws..
If I were a terrorist I would see this as a very soft target for numerous and obvious reasons. To call it a tempting target would be an understatement.

As an eco nut I would be all over this as a disaster in the making.

First it would alter the surrounding eco-system by raising the water temperature. As an example, if this were put off the coast of Maine you would see a drop in the quantity and quality of the cold-water lobsters and cod caught in those waters.

Then you have the potential of a radioactive leak getting caught in the ocean currents and dragged all over the Atlantic. Think of Chernobyl happening under the sea. In Russia much of the serious radioactive dust fell in a relatively confined footprint down wind.

Using the Maine example again, you would be talking about the poisoning of ocean based food supplies from the east coast of the USA to Canada, Greenland, Iceland, England, Europe, Africa, etc? I think you get the picture.

Finally what do you do with the leftovers when it hits EOL? Do you abandon it in place as stated by teched? An undersea cleanup would be a challenge.
Posted by Hates Idiots
24th Jan 2011
+2 Votes
+ -
RE: France's latest green idea: underwater nuclear reactors
GREEN IDEA!!!??? Next we'll be calling smog fresh air and acid rain, nature's paint remover. In what insane world does it make more sense to screw up the ocean, which regulates the entire world's weather. Witness the vast issues world-wide caused by el nino and la nina episodes. Droughts and floods in Southeast Asia and Auustralia, massive Typhoons in the Pacific, Katrina, this years winter of record snowfall in the Northeast US. In addition, look at how ocean currents concentrate all the trash that is washed into it from all the surrounding shores into central locations in Pacific and Atlantic ocean which has patches of plastic bottles and other trash hundreds of square miles in extent. Finally a thing which no one seems to recall any more is the heat pollution caused by these reactors. The Calvert Cliffs reactor in Maryland had already altered the ecology (and the weather) of that area of the Chesapeake Bay watershed from the heat being discharged from its cooling water. (I am not referring to the radioactive coolant that contacts the fuel directly but the water that is used to cool off that coolant and to condense the steam used to run the turbines.) At a time of global warming when the ice caps are melting and methane (an even worse greenhouse gas than C02), on the ocean floor is being released into the athmosphere because of the increase in ocean temperatures, does it make sense to pump even more heat into the ocean?!!

In an era of truly stupid ideas, this has got to be one of the stupidest. As Larry Niven is always having his characters say, "You didn't think it through."
Posted by joeller
30th Mar 2011
+1 Vote
+ -
RE: France's latest green idea: underwater nuclear reactors
I can think of better cleaner, environmentally friendly ideas to spend the kind of money this will cost on.

I'm affraid the under sea world of jacques costeaux would not approve. Become a NIMOT like me (Not In My Ocean Thanks).
Non Merci mon amis!

Regards Phillipe
chargehere ltd
Posted by ev_fisheye
25th Apr 2011
0 Votes
+ -
Good Lord!
Sounds like a wonderful combination of the Gulf Coast Disaster and Fukushima. What can they be thinking?
Posted by James Mooney
8th Oct
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