Energy For the Future.
July 21, 2010 Leave a Comment
Energy For the Future.
Babcock & Wilcox announced last week that it’s new subsidiary B&W Modular Nuclear Energy, LLC will be offering a new design that’s passively safe, scalable and modular using the old light water reactor method. That might not sound like a big deal, but in the face of the regulatory thresholds to cross, it’s a very smart strategy.
The new modules are sized to the 125 to 750 MWe outputs. Those sizes get to the good sized plant at the large rating and at the small end offers upgrades to current facilities and module reactors can be added as needs increase. The shift out from reactors that shouldn’t need the giant confinement domes may well be coming, so dropping construction costs.
The reactors are five-year fuel cycle devices or they run continuously for five years without a refueling. Emissions are nil outside of the needs for the building and construction of rectors and the sites. This has to make sensible environment types happy and relieve consumers that sure supply at affordable prices might still be the future.
The B&W site lists these features:
- Integral nuclear system design.
- Passive safety systems.
- Underground containment.
- Five-year operating cycle between refueling.
- Scalable, modular design is flexible for local needs.
- Multi-unit (1 to 10+) plant.
- Used fuel stored in spent fuel pool for life of the reactor (60 years).
- North American shop-manufactured.
These features when viewed in a combined set offer a dramatic change in nuclear power. Today a utility would ask the government for permissions to build something that has already been through the bureaucratic grinder. That something would be an approved design. The application then would go through whatever hoops have been set up by law and the regulations. The process takes years, million of dollars and may or may not be approved. It’s a big risk for the utility and its customers. Remember, utilities can go broke, too.
Having smaller reactors that could be ganged together for larger output could well cut those costs, or perhaps reduce the repeated application process. The passive safety design also sets up a simpler and easier to run training and safety program. Mounted below ground minimizes a wealth of issues that above surface installations would need. Perhaps most importantly is the reactor can be manufactured, permitting the economies of volume and standardization to work, in a factory with the opportunity to have more intense quality control and mass-produced parts. One would really like to see the dollar numbers comparing a manufactured unit vs. an on site, single design, custom built with all the safety and containment paraphernalia a current reactor needs.
B&W believes this optimized ALWR Generation III++ nuclear technology can be certified, manufactured and operated within today’s existing regulatory, industrial supply chain and utility operational infrastructure. If they pull that off, the unit can be delivered by rail. Now that’s a major change, indeed.
Another notable issue is the construction period is; now grab your seat belt, only three years. That aspect also is a cost reducing issue that leads to others when considering the modular design. One can be built and running while others are added over time.
The environment is also going to benefit. The estimate is 57 million tons of CO2 will not be emitted over the life of the new reactors. That really means less coal and natural gas gets burned allowing the supply to feed other markets. The local impacts are minimal as well. These reactors are not very big. Underground installation keeps them out of the way from such as tornadoes and terrorist’s planes. The steam condenser is air cooled, which should be a source for secondary energy recovery.
That’s all for the good. The political side isn’t so bright. Obama has killed the Yucca Mountain used fuel repository. The Republicans showed up for the company’s press conference totaling four, three Senators and a Representative. One Democrat showed up. Not good. But we’re here, watching. Fusion and thorium are years off, so this move by Babcock & Wilcox is timely.
The issue of interest though, reactor fuel efficiency isn’t covered, a disappointment. One would expect good numbers here, as it’s a later design.
Yet it’s timely because this is a certain remedy for using so much coal, the excuse behind the cap and trade scheme. It’s a case of using innovation and technology to improve the electrical power supply that may well lead to more and cheaper. It’s just the medicine for an ailing economy and well, energy for economic growth and progress.
That puts the Hyperion small reactor and now the Babcock and Wilcox “mPower” reactor front and center for uranium fueled reactors. Both are modular, transportable and much less expensive than the old technology and likely the huge later generation reactors for new installations. Things are looking very good form a technology standpoint. Now if the economy and the politicians could catch up, an economy with high efficiency electrical power could come to the future soon.
Using Carbon Nanotubes in Lithium Batteries Can Dramatically Improve Energy Capacity
ScienceDaily (June 21, 2010) — Batteries might gain a boost in power capacity as a result of a new finding from researchers at MIT. They found that using carbon nanotubes for one of the battery’s electrodes produced a significant increase — up to tenfold — in the amount of power it could deliver from a given weight of material, compared to a conventional lithium-ion battery. Such electrodes might find applications in small portable devices, and with further research might also lead to improved batteries for larger, more power-hungry applications.
To produce the powerful new electrode material, the team used a layer-by-layer fabrication method, in which a base material is alternately dipped in solutions containing carbon nanotubes that have been treated with simple organic compounds that give them either a positive or negative net charge. When these layers are alternated on a surface, they bond tightly together because of the complementary charges, making a stable and durable film.
The findings, by a team led by Associate Professor of Mechanical Engineering and Materials Science and Engineering Yang Shao-Horn, in collaboration with Bayer Chair Professor of Chemical Engineering Paula Hammond, are reported in a paper published June 20 in the journal Nature Nanotechnology. The lead authors are chemical engineering student Seung Woo Lee PhD ’10 and postdoctoral researcher Naoaki Yabuuchi.
Batteries, such as the lithium-ion batteries widely used in portable electronics, are made up of three basic components: two electrodes (called the anode, or negative electrode, and the cathode, or positive electrode) separated by an electrolyte, an electrically conductive material through which charged particles, or ions, can move easily. When these batteries are in use, positively charged lithium ions travel across the electrolyte to the cathode, producing an electric current; when they are recharged, an external current causes these ions to move the opposite way, so they become embedded in the spaces in the porous material of the anode.
In the new battery electrode, carbon nanotubes — a form of pure carbon in which sheets of carbon atoms are rolled up into tiny tubes — “self-assemble” into a tightly bound structure that is porous at the nanometer scale (billionths of a meter). In addition, the carbon nanotubes have many oxygen groups on their surfaces, which can store a large number of lithium ions; this enables carbon nanotubes for the first time to serve as the positive electrode in lithium batteries, instead of just the negative electrode.
This “electrostatic self-assembly” process is important, Hammond explains, because ordinarily carbon nanotubes on a surface tend to clump together in bundles, leaving fewer exposed surfaces to undergo reactions. By incorporating organic molecules on the nanotubes, they assemble in a way that “has a high degree of porosity while having a great number of nanotubes present,” she says.
Lithium batteries with the new material demonstrate some of the advantages of both capacitors, which can produce very high power outputs in short bursts, and lithium batteries, which can provide lower power steadily for long periods, Lee says. The energy output for a given weight of this new electrode material was shown to be five times greater than for conventional capacitors, and the total power delivery rate was 10 times that of lithium-ion batteries, the team says. This performance can be attributed to good conduction of ions and electrons in the electrode, and efficient lithium storage on the surface of the nanotubes.
In addition to their high power output, the carbon nanotube electrodes showed very good stability over time. After 1,000 cycles of charging and discharging a test battery, there was no detectable change in the material’s performance.
The electrodes the team produced had thicknesses up to a few microns, and the improvements in energy delivery only were seen at high-power output levels. In future work, the team aims to produce thicker electrodes and extend the improved performance to low-power outputs as well, they say. In its present form, the material might have applications for small, portable electronic devices, says Shao-Horn, but if the reported high power capability were demonstrated in a much thicker form — with thicknesses of hundreds of microns rather than just a few — it might eventually be suitable for other applications such as hybrid cars.
While the electrode material was produced by alternately dipping a substrate into two different solutions — a relatively time-consuming process — Hammond suggests that the process could be modified by instead spraying the alternate layers onto a moving ribbon of material, a technique now being developed in her lab. This could eventually open the possibility of a continuous manufacturing process that could be scaled up to high volumes for commercial production, and could also be used to produce thicker electrodes with a greater power capacity. “There isn’t a real limit” on the potential thickness, Hammond says. “The only limit is the time it takes to make the layers,” and the spraying technique can be up to 100 times faster than dipping, she says.
Lee says that while carbon nanotubes have been produced in limited quantities so far, a number of companies are currently gearing up for mass production of the material, which could help to make it a viable material for large-scale battery manufacturing.
New Method for Producing Graphene Paves Way for Mass Production of Nanomaterial
ScienceDaily (June 22, 2010) — Researchers at Rensselaer Polytechnic Institute have developed a simple new method for producing large quantities of the promising nanomaterial graphene. The new technique works at room temperature, needs little processing, and paves the way for cost-effective mass production of graphene.
An atom-thick sheet of carbon arranged in a honeycomb structure, graphene has unique mechanical and electrical properties and is considered a potential heir to copper and silicon as the fundamental building block of nanoelectronics. Since graphene’s discovery in 2004, researchers have been searching for an easy method to produce it in bulk quantities.
A team of interdisciplinary researchers, led by Swastik Kar, research assistant professor in the Department of Physics, Applied Physics, and Astronomy at Rensselaer, has brought science a step closer to realizing this important goal. By submerging graphite in a mixture of dilute organic acid, alcohol, and water, and then exposing it to ultrasonic sound, the team discovered that the acid works as a “molecular wedge, ” which separates sheets of graphene from the parent graphite. The process results in the creation of large quantities of undamaged, high-quality graphene dispersed in water. Kar and team then used the graphene to build chemical sensors and ultracapacitors.
“There are other known techniques for fabricating graphene, but our process is advantageous for mass production as it is low cost, performed at room temperature, devoid of any harsh chemicals, and thus is friendly to a number of technologies where temperature and environmental limitations exist,” Kar said. “The process does not need any controlled environment chambers, which enhances its simplicity without compromising its scalability. This simplicity enabled us to directly demonstrate high-performance applications related to environmental sensing and energy storage, which have become issues of global importance.”
Results of the study, titled “Stable Aqueous Dispersions of Non-Covalently Functionalized Graphene from Graphite and their Multifunctional High-Performance Applications,” were published online by the journal Nano Letters. The study will also be the cover story of the November print edition of Nano Letters.
Graphene eluded scientists for years but was finally made in the laboratory in 2004 with the help of a common office supply — clear adhesive tape. Graphite, the common material used in most pencils, is made up of countless layers of graphene. Researchers at first simply used the gentle stickiness of tape to pull layers of graphene from a piece of graphite.
Today, graphene fabrication is much more sophisticated. The most commonly used method, however, which involves oxidizing graphite and reducing the oxide at a later stage in the process, results in a degradation of graphene’s attractive conductive properties, Kar said. His team took a different route.
The researchers dissolved 1-pyrenecarboxylic acid (PCA) in a solution of water and methanol, and then introduced bulk graphite powder. The pyrene part of PCA is mostly hydrophobic, and clings to the surface of the also-hydrophobic graphite. The mixture is exposed to ultrasonic sound, which vibrates and agitates the graphite. As the molecular bonds holding together the graphene sheets in graphite start to weaken because of the agitation, the PCA also exploits these weakening bonds and works its way between the layers of graphene that make up the graphite. Ultimately, this coordinated attack results in layers of graphene flaking off of the graphite and into the water. The PCA also helps ensure the graphene does not clump and remains evenly dispersed in the water. Water is benign, and is an ideal vehicle through which graphene can be introduced into new applications and areas of research, Kar said.
“We believe that our method also will be useful for applications of graphene which require an aqueous medium, such as biomolecular experiments with living cells, or investigations involving glucose or protein interactions with graphene,” he said.
Using ultrathin membranes fabricated from graphene, the research team developed chemical sensors that can easily identify ethanol from within a mixture of different gases and vapors. Such a sensor could possibly be used as an industrial leakage detector or a breath-alcohol analyzer. The researchers also used the graphene to build an ultra-thin energy-storage device. The double-layer capacitor demonstrated high specific capacitance, power, and energy density, and performed far superior to similar devices fabricated in the past using graphene. Both devices show great promise for further performance enhancements, Kar said.
Co-authors on the Nano Letters paper are Rensselaer Post Doctoral Research Associate Xiaohong An; Assistant Professor Kim M. Lewis; Clinical Professor and Center for Integrated Electronics Associate Director Morris Washington; and Professor Saroj Nayak, all of the Department of Physics, Applied Physics, and Astronomy; Rensselaer doctoral student Trevor Simmons of the Department of Chemistry and Chemical Biology; along with Rakesh Shah, Christopher Wolfe, and Saikat Talapatra of the Department of Physics at Southern Illinois University Carbondale.
The research project was supported by the Interconnect Focus Center New York at Rensselaer, as well as the National Science Foundation (NSF) Division of Electrical, Communications and Cyber Systems.
Story Source:
The above story is reprinted (with editorial adaptations by ScienceDaily staff) from materials provided by Rensselaer Polytechnic Institute.
Virus-Built Battery Could Power Cars, Electronic Devices
The new virus-produced batteries have the same energy capacity and power performance as state-of-the-art rechargeable batteries being considered to power plug-in hybrid cars, and they could also be used to power a range of personal electronic devices, said Angela Belcher, the MIT materials scientist who led the research team.
The new batteries, described in the April 2 online edition of Science, could be manufactured with a cheap and environmentally benign process: The synthesis takes place at and below room temperature and requires no harmful organic solvents, and the materials that go into the battery are non-toxic.
In a traditional lithium-ion battery, lithium ions flow between a negatively charged anode, usually graphite, and the positively charged cathode, usually cobalt oxide or lithium iron phosphate. Three years ago, an MIT team led by Belcher reported that it had engineered viruses that could build an anode by coating themselves with cobalt oxide and gold and self-assembling to form a nanowire.
In the latest work, the team focused on building a highly powerful cathode to pair up with the anode, said Belcher, the Germeshausen Professor of Materials Science and Engineering and Biological Engineering. Cathodes are more difficult to build than anodes because they must be highly conducting to be a fast electrode, however, most candidate materials for cathodes are highly insulating (non-conductive).
To achieve that, the researchers, including MIT Professor Gerbrand Ceder of materials science and Associate Professor Michael Strano of chemical engineering, genetically engineered viruses that first coat themselves with iron phosphate, then grab hold of carbon nanotubes to create a network of highly conductive material.
Because the viruses recognize and bind specifically to certain materials (carbon nanotubes in this case), each iron phosphate nanowire can be electrically “wired” to conducting carbon nanotube networks. Electrons can travel along the carbon nanotube networks, percolating throughout the electrodes to the iron phosphate and transferring energy in a very short time.
The viruses are a common bacteriophage, which infect bacteria but are harmless to humans.
The team found that incorporating carbon nanotubes increases the cathode’s conductivity without adding too much weight to the battery. In lab tests, batteries with the new cathode material could be charged and discharged at least 100 times without losing any capacitance. That is fewer charge cycles than currently available lithium-ion batteries, but “we expect them to be able to go much longer,” Belcher said.
The prototype is packaged as a typical coin cell battery, but the technology allows for the assembly of very lightweight, flexible and conformable batteries that can take the shape of their container.
Last week, MIT President Susan Hockfield took the prototype battery to a press briefing at the White House where she and U.S. President Barack Obama spoke about the need for federal funding to advance new clean-energy technologies.
Now that the researchers have demonstrated they can wire virus batteries at the nanoscale, they intend to pursue even better batteries using materials with higher voltage and capacitance, such as manganese phosphate and nickel phosphate, said Belcher. Once that next generation is ready, the technology could go into commercial production, she said.
Lead authors of the Science paper are Yun Jung Lee and Hyunjung Yi, graduate students in materials science and engineering. Other authors are Woo-Jae Kim, postdoctoral fellow in chemical engineering; Kisuk Kang, recent MIT PhD recipient in materials science and engineering; and Dong Soo Yun, research engineer in materials science and engineering.
The research was funded by the Army Research Office Institute of the Institute of Collaborative Technologies, and the National Science Foundation through the Materials Research Science and Engineering Centers program.
- Fabricating Genetically Engineered High-Power Lithium Ion Batteries Using Multiple Virus Genes. Science, 2009; DOI: 10.1126/science.1171541
Note: If no author is given, the source is cited instead.
MU Researchers Create Smaller and More Efficient Nuclear Battery
Mizzou scientist develops a powerful nuclear battery that uses a liquid semiconductor
Oct. 07, 2009
Story Contact(s):
Kelsey Jackson, JacksonKN@missouri.edu, (573) 882-8353
COLUMBIA, Mo. – 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.
Kwon’s research has been published in the Journal of Applied Physics Letters and Journal of Radioanalytical and Nuclear Chemistry. In addition, last June, he received an “outstanding paper” award for his research on nuclear batteries at the IEEE International Conference on Solid-State Sensors, Actuators and Microsystems in Denver (Transducers 2009).
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.” The nuclear batteries are providing power for a decade or more. There are various radiation sources for energy levels of watts to kilowatts. Higher power levels would tend to need radiation shielding. The smaller devices would provide a fraction of a watt, but again last for a decade.
The Navy thinks it is feasible to scale liquid nuclear batteries to the 100 kw to 1 MW levels. For that kind of application, you could have the radiation shielding.
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.”
“The hard part of using radioactive decay is that when you harvest the energy, part of that energy goes towards creating defects that damage a solid-state semiconductor,” Robertson, associate director of the research reactor, said. “Our hypothesis is that with a liquid-state semiconductor, the same damage won’t happen. So we created a battery without that part degrading over time.”
A long-lived power source not much larger than a MEMS device could be a hot property in the MEMS manufacturing industry. But Kwon says that there is “a long way to go” before his battery is ready for commercial marketing.
“Not necessarily in terms of a long time, but we have a lot of work before it is ready for industry. At this moment, we’re still at the fundamental research level,” he said.
Kwon, Robertson and their team are currently focused on increasing the power output and shrinking the size of the battery even further – among other things, they are exploring using other materials besides the sulfur-35 isotope they are currently using. They’ve also filed for a provisional patent.
“In the future, the battery can be thinner than the thickness of a human hair,” Kwon said.






Plants are able to assess their environment by analyzing light, and are able to “remember” light they have experienced recently. By analyzing chemical reactions in leaves, scientists have come to appreciate that plants possess a kind of intelligence.



But then, as I listened to Hannity later in the same day I realized…he too thinks every damn thing is amazing. It’s out of control now I guess. So I watched a crow picking at a discarded bag of McDonald’s crap laying in a parking lot. I was waiting for someone and it was 97 ° outside with humidity levels up around the perspiration seepage of a silver back NBA player in double overtime. It was hot out. I wondered if the crow was the least bit concerned with his cholesterol. He was eating a greasy french fry off sweltering pavement. Do crows have issues with arterial blockages? They should if they’re going to be eating crap like McDonald’s french fries. And what about diabetes? Potatoes and other carbs can lead to raised sugar. Do crows get that too? I know my cat is diabetic so why not a stupid ass crow? Fucking thing eats garbage. I suppose as birds go, the crow is their nigger. He was “lovin’ it”! As all this was happening a big black wasp landed on my windshield. It just sat there baking in the AlGore sun, tip toeing around slowly. I leaned up to get a close look. Nigger birds, then nigger bugs…what a day. Mean looking little prick I thought. And I think the little turd was looking back at me. We made eye contact and I think I read its little mind just then. It said, “If I were six feet tall, you’d be fucked.” I had to agree. Imagine if wasps were our size? Jesus man, that would be …fucking amazing!




























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