Archive for the ‘nuclear energy’ category: Page 11

Dec 31, 2023

Tungsten divertors to help Korean Artificial Sun to sustain 100m degrees

Posted by in category: nuclear energy

KSTAR, the Korea Institute of Fusion Energy’s (KFE) artificial Sun, has completed a significant modification that would allow it to function for longer periods at higher temperatures. KSTAR stands for Korea Superconducting Tokamak Advanced Research, an advanced nuclear fusion reactor constructed in 2007.

The development in this regard involved the installation of its newly developed tungsten divertors, “allowing it to operate for extended periods sustaining high-temperature plasma over the 100 million degrees,” according to a statement by the institute.

The team claimed they could complete a plasma experiment with the reactor equipped with the new divertor on December 21. In 2021, KSTAR set a new record by running at one million degrees and maintaining super-hot plasma for 30 seconds.

Dec 30, 2023

A brief tour of the PDP-11, the most influential minicomputer of all time

Posted by in categories: military, nuclear energy, robotics/AI, space

Early PDP-11 models were not overly impressive. The first PDP-11 11/20 cost $20,000, but it shipped with only about 4KB of RAM. It used paper tape as storage and had an ASR-33 teletype printer console that printed 10 characters per second. But it also had an amazing orthogonal 16-bit architecture, eight registers, 65KB of address space, a 1.25 MHz cycle time, and a flexible UNIBUS hardware bus that would support future hardware peripherals. This was a winning combination for its creator, Digital Equipment Corporation.

The initial application for the PDP-11 included real-time hardware control, factory automation, and data processing. As the PDP-11 gained a reputation for flexibility, programmability, and affordability, it saw use in traffic light control systems, the Nike missile defense system, air traffic control, nuclear power plants, Navy pilot training systems, and telecommunications. It also pioneered the word processing and data processing that we now take for granted.

And the PDP-11’s influence is most strikingly evident in the device’s assembly programming.

Dec 28, 2023

How Does The Nucleus Hold Together?

Posted by in categories: chemistry, finance, nuclear energy, particle physics

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Dec 27, 2023

Japan lifts operational ban on world’s biggest nuclear plant

Posted by in category: nuclear energy

TOKYO, Dec 27 (Reuters) — Japan’s nuclear power regulator on Wednesday lifted an operational ban imposed on Tokyo Electric Power’s (9501.T) Kashiwazaki-Kariwa nuclear power plant two years ago, allowing it to work towards gaining local permission to restart.

Tepco has been eager to bring the world’s largest atomic power plant back online to slash operating costs, but a resumption still needs consent from the local governments of Niigata prefecture, Kashiwazaki city and Kariwa village, where it is located.

When that might happen is unknown.

Dec 25, 2023

Neutron Pairs Condense in Excited Helium-8

Posted by in categories: nuclear energy, particle physics, space

In its ground state, the helium-8 (8He) nucleus consists of an alpha particle (4He nucleus) and four neutrons. If, before its few-hundred-milliseconds life ends, an 8 He nucleus is nudged into its first 0+ excited state, the four neutrons form two pairs known as dineutron clusters. According to theory, the alpha particle and the two neutron clusters settle into a three-member nuclear analog of a Bose-Einstein condensate. That outcome has now been observed for the first time by Zaihong Yang of Peking University and his colleagues at the RIKEN Nishina Center in Japan [1].

The experiment entailed firing a high-intensity beam of 8 He nuclei at polyethylene and carbon targets. Some collisions excited the nuclei into the sought-after condensate state, which promptly broke up into a helium-6 (6He) nucleus and a single neutron pair. The 6 He nuclei made their way through dipole magnets to drift detectors and plastic scintillators for characterization. The neutrons struck a plastic scintillator whose layered construction made it possible to identify which neutrons were correlated—that is, members of a dineutron cluster—and which were not. The correlated neutron pairs and the scattering count rate’s dependence on energy, angle, and type of target were all consistent with theoretical predictions of the nature of the correlated 8 He excited state.

The 8 He condensate resembles the so-called Hoyle state of carbon-12, which consists of three alpha particles in the condensed state. Astronomer Fred Hoyle predicted the state in 1954 to account for the synthesis of carbon in helium-burning stars. Yang points out that nuclear condensates could also have implications for understanding the structures of exotic nuclei and neutron stars.

Dec 24, 2023

Atmospheric Neutrinos Revisited

Posted by in categories: nuclear energy, particle physics

The combined analysis of present and upcoming atmospheric-neutrino experiments may lead to the solution of outstanding puzzles in neutrino physics.

Neutrinos are fickle. Produced with a certain leptonic flavor (electron, muon, or tau), neutrinos can change their flavor as they travel through space. In 1998, researchers discovered this beyond-standard-model neutrino-oscillation phenomenon using neutrinos from natural sources—Earth’s atmosphere and the Sun. Increasingly accurate experiments also involved artificial neutrino sources such as accelerators and nuclear reactors. These experiments have significantly advanced our understanding of neutrino oscillations but haven’t yet solved two important related questions regarding the ordering of neutrino masses and possible violations by neutrinos of a fundamental symmetry known as charge-parity (CP) symmetry. New work by Carlos Alberto Argüelles-Delgado of Harvard University and colleagues shows that atmospheric neutrino experiments, once pivotal in the discovery of neutrino oscillation, can still play a key role in answering those questions [1].

Dec 23, 2023

Scientists find first hints of nuclear fission in universe, challenging theories

Posted by in categories: nuclear energy, space

Researchers have now identified the first signs of nuclear fission in the cosmos, something that has baffled scientists since the 1950s.

Scientists from Los Alamos National Laboratory and North Carolina State University have uncovered compelling evidence of nuclear fission occurring in the cosmos, specifically during the merger of neutron stars. This discovery challenges long-held beliefs and opens a new chapter in our understanding of heavy element formation in the universe.

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Dec 23, 2023

Timelapse of Future Technology Vol. II (Sci-Fi Documentary)

Posted by in categories: biotech/medical, education, information science, internet, nuclear energy, robotics/AI

This timelapse of future technology begins with 2 Starships, launched to resupply the International Space Station. But how far into the future do you want to go?

Tesla Bots will be sent to work on the Moon, and A.I. chat bots will guide people into dreams that they can control (lucid dreams). And what happens when humanity forms a deeper understanding of dark energy, worm holes, and black holes. What type of new technologies could this advanced knowledge develop? Could SpaceX launch 100 Artificial Intelligence Starships, spread across our Solar System and beyond into Interstellar space, working together to form a cosmic internet, creating the Encyclopedia of the Galaxy. Could Einstein’s equations lead to technologies in teleportation, and laboratory grown black holes.

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Dec 22, 2023

Scientists find new way to desalinate seawater using solar power, study says

Posted by in categories: biotech/medical, nuclear energy, solar power

Scientists may have found a more efficient water to desalinate water using solar power, according to new research, offering a solution for global water scarcity through the use of renewable energy.

Researchers at Nankai University in Tianjin, China, developed the concept of a solar-powered desalination system that produces fresh water by using smart DNA hydrogels that does not consume additional energy, compared to conventional desalination strategies currently in use, such as reverse osmosis, which use copious amounts of energy, according to a paper published in the journal Science Advances on Thursday.

The same process can be used simultaneously to extract uranium from seawater or treat uranyl containing nuclear wastewater, the researchers said.

Dec 15, 2023

World’s first Generation IV nuclear reactor gets operational in China

Posted by in categories: engineering, nuclear energy

The reactor uses tiny balls of fuel and heats gas to generate electricity.

In what can be termed a significant achievement in the development of next-generation nuclear reactor technology, China claims to have successfully commissioned the world’s first Generation IV commercial nuclear reactor.

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