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Jong-Kyu Park and colleagues predicted a set of distortions that could control ELMs without any additional instabilities. They then tested these distortions at the Korean Superconducting Tokamak Advanced Research (KSTAR)—a ring-shaped magnetic fusion confinement device. Their experiments worked.

“We show for the first time the full 3D field operating window in a tokamak to suppress ELMs without stirring up core instabilities or excessively degrading confinement,” Park said. “For a long time we thought it would be too computationally difficult to identify all beneficial symmetry-breaking fields, but our work now demonstrates a simple procedure to identify the set of all such configurations.”

Continue reading “Nuclear fusion scientists just solved a major problem in harnessing plasma hotter than the Sun” »

Scientists from Princeton University and the Department of Energy’s Princeton Plasma Physics Laboratory (PPPL) have used radio frequency waves and temperature to stabilize the white-hot and volatile plasma that swirls inside of fusion reactors like tokamaks and stellarators.

The radio waves disrupt the magnetic islands that form and disrupt the plasma flow, and temperature magnifies the stabilizing effect. As the saying goes, the disruptor of your disruptor is your friend.

Also could do a magnonic fusion reactor.

Magnetic Islands

But there may be a way to force the plasma into doing what we want more predictably and efficiently, as detailed in a new theoretical paper published in the journal Physics of Plasmas.

Continue reading “Physicists Discover New Trick to Stabilize Fusion Reactors” »

Alloy 617 — a combination of nickel, chromium, cobalt and molybdenum — has been approved by the American Society of Mechanical Engineers (ASME) for inclusion in its Boiler and Pressure Vessel Code. This means the alloy, which was tested by Idaho National Laboratory (INL), can be used in proposed molten salt, high-temperature, gas-cooled or sodium reactors. It is the first new material to be added to the Code in 30 years.

The Boiler and Pressure Vessel Code lays out design rules for how much stress is acceptable and specifies the materials that can be used for power plant construction, including in nuclear power plants. Adhering to these specifications ensures component safety and performance.

INL spent 12 years qualifying Alloy 617, with a USD15 million investment from the US Department of Energy. A team at INL, in collaboration with groups at Argonne National Laboratory and Oak Ridge National Laboratory, as well as industry consultants and international partners, has now received approval from ASME for the alloy’s inclusion in the Code. Designers working on new high-temperature nuclear power plant concepts now have more options when it comes to component construction materials.

A typical nuclear reactor uses only a small fraction of its fuel rod to produce power before the energy-generating reaction naturally terminates. What is left behind is an assortment of radioactive elements, including unused fuel, that are disposed of as nuclear waste in the United States. Although certain elements recycled from waste can be used for powering newer generations of nuclear reactors, extracting leftover fuel in a way that prevents possible misuse is an ongoing challenge.

Now, Texas A&M University engineering researchers have devised a simple, proliferation-resistant approach for separating out different components of nuclear waste. The one-step chemical reaction, described in the February issue of the journal Industrial & Engineering Chemistry Research, results in the formation of crystals containing all of the leftover nuclear fuel elements distributed uniformly.

The researchers also noted that the simplicity of their recycling approach makes the translation from lab bench to industry feasible.

Scientists working at Idaho National Laboratory (INL) have announced the approval of a new high-temperature metal after 12 years and a $15 million Department of Energy investment. Alloy 617, a “combination of nickel, chromium, cobalt and molybdenum,” is tolerant and strong at temperatures of more than 1,700 degrees Fahrenheit. The scientists say this means it could be used in existing high temperature nuclear facilities as well as cutting-edge applications like molten salt reactors.

For any new nuclear plant material, making the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code is like qualifying for the Olympics. Alloy 617 is the first new material to get into “The Code” in 30 years.

The JLTV is the successor to the Humvee, and the Army plans to buy at least 50,000 in the coming decades.
The Army, concerned that civilian adoption of electric vehicles could leave it vulnerable, is looking into making the JLTV itself an EV.
An electric JLTV would reduce the need for diesel fuel at remote outposts, with power provided by solar or nuclear energy.

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#USmilitary
#MilitaryNews

GE offshore wind: massive offshore turbine Haliade-X 12MW looks like a winner.

GE-Hitachi Nuclear Energy may be a receding opportunity.

GE might sell its steam power business and rationalise its fossil fuel interests.

Continue reading “GE Power Plays: Wind Might Blow Coal, Gas And Nuclear Away” »

Could nuclear fusion finally be right around the corner… in 2035?

The International Thermonuclear Experimental Reactor, or ITER, is a 30-year-old project started by President Ronald Reagan and Soviet leader Mikhail Gorbachev. With tens of billions of dollars on the line, this experimental tokamak fusion reactor—a nuclear fusion plasma reactor where extremely hot, charged plasma spins and generates virtually limitless energy—is one of a handful of extremely costly “miniature suns” around the world.