Archive for the ‘nuclear energy’ category: Page 116
Jun 25, 2018
Has This Startup Cracked the Secret to Fusion Energy?
Posted by Genevieve Klien in categories: nuclear energy, particle physics
A new startup hopes that orienting the spins of hydrogen atoms could finally crack the puzzle of commercially viable fusion energy, but some experts are skeptical.
Jun 19, 2018
Washington firm could create nuclear fusion power within decades
Posted by Carse Peel in category: nuclear energy
Olympia, Washington, firm Agni Energy has designed a nuclear fusion reactor that borrows elements from existing designs and could lead it to be the first to crack the Holy Grail of energy production.
Jun 10, 2018
Researchers Have Invented an Awesome And Scary Nuclear Battery Pack
Posted by Shane Hinshaw in categories: materials, nuclear energy
Are we ready?
Batteries powered by radioactive materials have been around for more than a century, but what they promise in power they usually lose in bulk.
Not so with a new kind of power source, which combines a novel structure with a nickel isotope to pack ten times more power than an electrochemical cell of the same size. The only question is, are we ready to go nuclear?
Continue reading “Researchers Have Invented an Awesome And Scary Nuclear Battery Pack” »
Jun 10, 2018
What would solar system travel be like with scaled Mach effect propellantless propulsion?
Posted by Klaus Baldauf in categories: nuclear energy, space travel
James Woodward and the Space Studies Institute has a Phase 2 NASA Innovative Advanced funded study. They are looking at the implementation of an innovative thrust producing technology for use in NASA missions involving in space main propulsion.
Dr. Heidi Fearn explained in a video made in 2017 how just scaling the power and size of the Mach effect propulsion causes problems. (heat, arcing and other problems). They currently believe they can scale the device to one newton of propulsion and then create large arrays of the devices for more thrust. The constant thrust could last for years or decades by using a nuclear power source.
For Mach effect propellantless propulsion it will be better to go to an array of smaller devices.
Jun 8, 2018
Milestone claimed as experimental nuclear reactor reaches temperature of the Sun
Posted by Genevieve Klien in category: nuclear energy
One of the possible pathways to limitless and clean energy can be found in hollow, doughnut-shaped chambers known as tokamak nuclear fusion reactors. A relatively new player on the scene, a UK company called Tokamak Energy, is claiming a new milestone in the area after heating its ST40 device to 15 million degrees Celsius, similar to temperatures found at the center of the Sun.
Jun 1, 2018
Prototype nuclear battery packs 10 times more power
Posted by Klaus Baldauf in categories: biotech/medical, nuclear energy, robotics/AI, space travel
Russian researchers from the Moscow Institute of Physics and Technology (MIPT), the Technological Institute for Superhard and Novel Carbon Materials (TISNCM), and the National University of Science and Technology MISIS have optimized the design of a nuclear battery generating power from the beta decay of nickel-63, a radioactive isotope. Their new battery prototype packs about 3,300 milliwatt-hours of energy per gram, which is more than in any other nuclear battery based on nickel-63, and 10 times more than the specific energy of commercial chemical cells. The paperwas published in the journal Diamond and Related Materials.
Conventional batteries
Ordinary batteries powering clocks, flashlights, toys, and other compact autonomous electrical devices use the energy of so-called redox chemical reactions. In them, electrons are transferred from one electrode to another via an electrolyte. This gives rise to a potential difference between the electrodes. If the two battery terminals are then connected by a conductor, electrons start flowing to remove the potential difference, generating an electric current. Chemical batteries, also known as galvanic cells, are characterized by a high power density — that is, the ratio between the power of the generated current and the volume of the battery. However, chemical cells discharge in a relatively short time, limiting their applications in autonomous devices. Some of these batteries, called accumulators, are rechargeable, but even they need to be replaced for charging. This may be dangerous, as in the case of a cardiac pacemaker, or even impossible, if the battery is powering a spacecraft.
May 18, 2018
Ghostly ‘Lightning’ Waves Discovered Inside a Nuclear Reactor
Posted by Genevieve Klien in categories: climatology, nuclear energy
Weird waves that whisper through the ionosphere have also been discovered inside the plasma of nuclear fusion reactors. They could help stop runaway electrons.
May 4, 2018
A Nuclear Reactor for Space Missions Passes Final Major Ground Tests
Posted by Jeffrey L. Lee in categories: nuclear energy, space
Nuclear power in space is still being pursued for future deep space missions…
A nuclear power plant that could provide power for long-duration crewed missions has passed another developmental milestone at NASA.
May 3, 2018
NASA successfully tested KRUSTY, a nuclear reactor that works in space and could power missions to the Moon or Mars
Posted by Genevieve Klien in categories: habitats, nuclear energy, space travel
If space is an ocean, the International Space Station is a raft tethered to the shore. The moon is a nearby island that we’ve visited briefly. To go any further or stay any longer, humanity needs more power.
Now, NASA may have the source: A tiny nuclear reactor called KRUSTY, for Kilopower Reactor Using Stirling Technology. (If you’re wondering if this is may be a reference to a popular animated series, its predecessor was known as DUFF).
The reactor uses nuclear fission—the energy released by splitting uranium-235 in a reactor core about the size of a paper towel— to produce 10 kilowatts of power for about ten years, which NASA says is enough energy to power several houses. Four of the reactors could power an outpost on the lunar surface.