Showing posts with label Nuclear. Show all posts
Showing posts with label Nuclear. Show all posts

Friday, August 12, 2011

Cars Powered by Heavy-Metal Thorium

From wardsauto.com U.S. Researcher Preparing Prototype Cars Powered by Heavy-Metal Thorium

Because thorium is so dense, similar to uranium, it stores considerable potential energy: 1 gm of thorium equals the energy of 7,500 gallons (28,391 L) of gasoline Stevens says. So, using just 8 gm of thorium in a car should mean it would never need refueling.

Friday, December 17, 2010

‎ Who needs Uranium when you can have "clean" Thorium?



An obscure metal that could energise our world... It's called thorium, it's eco-friendly, and there's lots of it. Many scientists say it could even replace uranium as a nuclear power source. But despite its potential, the metal is yet to gain a foothold in the market. RT's Laura Emmett explains why...

Thursday, July 29, 2010

Nuclear Energy Now More Expensive Than Solar

From Slashdot:

"According to an article on the New York Times, a historical cross-over has occurred because of the declining costs of solar vs. the increasing costs of nuclear energy: solar, hardly the cheapest of renewable technologies, is now cheaper than nuclear, at around 16 cents per kilowatt hour. Furthermore, the NY Times reports that financial markets will not finance the construction of nuclear power plants unless the risk of default (which is historically as high as 50 percent for the nuclear industry) is externalized to someone else through federal loan guarantees or ratepayer funding. The bottom line seems to be that nuclear is simply not competitive, and the push from the US government to subsidize it seems to be forcing the wrong choice on the market."

Thursday, March 18, 2010

Bill Gates on energy: Innovating to zero!

At TED2010, Bill Gates unveils his vision for the world's energy future, describing the need for "miracles" to avoid planetary catastrophe and explaining why he's backing a dramatically different type of nuclear reactor. The necessary goal? Zero carbon emissions globally by 2050.

Tuesday, November 10, 2009

10% of US Energy Derived From Old Soviet Nukes

There is a strange irony about this.

"The New York Times reports that about 10 percent of electricity generated in the United States comes from fuel from dismantled nuclear bombs, mostly Russian. 'It's a great, easy source' of fuel, said Marina V. Alekseyenkova, an analyst at Renaissance Bank and an expert in the Russian nuclear industry that has profited from the arrangement since the end of the cold war. But if more diluted weapons-grade uranium isn't secured soon, the pipeline could run dry, with ramifications for consumers, as well as some American utilities and their Russian suppliers.'"

Discussion on Slashdot

Monday, October 19, 2009

Dense Plasma Focus - Clean small scale Nuclear Fusion Energy

Dense Plasma Focus technology is the next best thing to what cold fusion had promised.  Best of all it's real and doesn't use any questionable physics.

Safe, small, low cost, low maintenance and efficient.  It looks like it will be small enough that it could be ran from inside a rail car or truck.

  • Fuel: uses a different fuel, hydrogen and boron rather than the conventional Deuterium and Tritium. 

  • Reactor:  much smaller, inexpensive, reactor in contrast to conventional approaches to fusion like the tokamak

  • Generator: generates electricity directly. The tokamak is designed to generate heat which then has to be converted to electricity using expensive turbines and generator.



Plasma is by it's nature unstable. The current approaches try to make a stable bubble using massive superconducting magnets. The DOD is spending billions with no end in sight to trying to achieve this, and buy there own admission they are still several multi-billion dollar reactors away from reaching unity (where they generate more power then it takes to start).
These tokamak reactors take almost unimaginable amounts of power to fire up. 

Instead Dense plasma focus take advantage of plasmas instability. It uses a high power capacitor bank discharges to compress plasma in to a Plasmoid that when is collapses upon itself pinches the plasma to create a very small intense pocket that is almost 1 Billion Degrees and under a lot of pressure.
So they end up with something that looks like a soda can sized spark plug, who's shape and design are specifically to compress the plasma and create a burst of electricity, Ions and X-Rays.

See this  Excellent Video Lecture 1 hr 4 minutes long.


"The Focus Fusion Society reports that the scientists and engineers at Lawrenceville Plasma Physics have finally built an operational Dense Plasma Focus device. While still at less than half power, they were able to achieve a pinch on their device. The small company that Eric Lerner started recently gathered enough funding to start a two-year study on the validity of his theory regarding fusion-inducing plasmoids. If the theory holds, the device will produce more electricity than it consumes. In contrast to the billions of dollars spent on Tokamak fusion (think ITER), LPP is conducting their research on a budget around a million dollars. Yet, if it works, it will provide nuclear fusion with much simpler equipment and much less cost. Eric Lerner and Focus Fusion have been discussed on Slashdot before."



Method and apparatus for producing x-rays, ion beams and nuclear fusion energy
US Pat. 7482607 - Filed Feb 28, 2006 - Lawrenceville Plasma Physics, Inc.

Articles:

Friday, October 9, 2009

Smaller And More Efficient Nuclear Battery Created

I can just see how green this is when people start tossing these in to landfills.

From: sciencedaily.com

Batteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri researchers are developing a nuclear energy source that is smaller, lighter and more efficient.

“To provide enough power, we need certain methods with high energy density,” said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope battery can provide power density that is six orders of magnitude higher than chemical batteries.”

Kwon and his research team have been working on building a small nuclear battery, currently the size and thickness of a penny, intended to power various micro/nanoelectromechanical systems (M/NEMS). Although nuclear batteries can pose concerns, Kwon said they are safe.

“People hear the word ‘nuclear’ and think of something very dangerous,” he said. “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”

His innovation is not only in the battery’s size, but also in its semiconductor. Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.

“The critical part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure of the solid semiconductor,” Kwon said. “By using a liquid semiconductor, we believe we can minimize that problem.”

Kwon has been collaborating with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, and is working to build and test the battery at the facility. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that the battery could be thinner than the thickness of human hair. They’ve also applied for a provisional patent.