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Submission + - Idaho Lab Produces World's First Molten Salt Fuel For Nuclear Reactors (cowboystatedaily.com)

schwit1 writes: The U.S. Department of Energy Office of Nuclear Energy announced this week that researchers at INL have successfully created the first batch of fuel salt.

Fuel salt is a molten salt mixture used as both a carrier for nuclear fuel and coolant in a molten salt reactor, a type of advanced nuclear reactor.

The fuel salt is critical for conducting the world’s first fast-spectrum, salt-fueled reactor test, known as the Molten Chloride Reactor Experiment (MCRE).

The test will help inform the future commercial deployment of a new class of advanced nuclear reactors, something a number of Wyoming-connected companies are proposing to build.

“There is a lot of push for this,” said James King, project lead for the Molten Chloride Experiment at INL. “We need to have a lot of different options so we can move away from less safe power generations methods.

“This is one of those technologies that can move us to better safety.”

The liquid form of the salt fuel means the fuel can’t melt. The technology would also offer another low-carbon alternative to generating power.

Submission + - USA will bar visa applicants who combat disinformation (npr.org) 1

ClickOnThis writes: The Trump administration wants to bar visa applicants who combat disinformation and hate speech from entering the USA on work visas, on the grounds that they practice 'censorship.' From the article:

The directive, sent in an internal memo on Tuesday, is focused on applicants for H-1B visas for highly skilled workers, which are frequently used by tech companies, among other sectors. The memo was first reported by Reuters; NPR also obtained a copy.

"If you uncover evidence an applicant was responsible for, or complicit in, censorship or attempted censorship of protected expression in the United States, you should pursue a finding that the applicant is ineligible" for a visa, the memo says. It refers to a policy announced by Secretary of State Marco Rubio in May restricting visas from being issued to "foreign officials and persons who are complicit in censoring Americans."


Comment Re:WTF are you talking about? (Score 1) 47

It used to be that when we set up an experiment we'll have a dependent variable (the effects on cultivation) and an independent variable (the ionizing radiation dose) and when we "studied" the second we'd also track the first.

You have a misconception about the experiment. The point wasn't to study the fungus itself but rather the point of the experiment was to see if and how much it would attenuate cosmic radiation.

Comment They didn't and they won't. (Score 1) 1

Adaptation: Displaced workers successfully shifted to non-metal manufacturing and retail sectors,

So everyone got pushed off to work retail while a few were able to make a lateral shift or take a major wage cut to an unskilled position. Given that there is no lateral shift to make here, it certainly sounds like everyone is SOL. When it averages out the "average base salary of a retail sales representative is $38,240" but "a retail sales representative at a luxury clothing brand will likely earn more than a similar role at Walmart". Which means most people are going to be closer to $30K if they are lucky.

The sound conclusion is that it will push more people into poverty.

Comment WTF are you talking about? (Score 4, Informative) 47

Sounds like a lot of claptrap, "we did an experiment on ISS, but we did not measure the effective dose and our conclusions are inconclusive".

What are you talking about? Did you even read the paper?!

Experimental Setup:

The flight hardware was housed in a 4 × 4 × 8 double unit standard-size CubeLab hardware module and consisted of the following main components: two Raspberry Pi 3 Model B+ (Raspberry Pi Foundation, Caldecote, Cambs., UK) single-board computers, EP-0104 DockerPi PowerBoard (Adafruit Industries, New York, NY, US), PocketGeiger Type5 (Radiation Watch, Miyagi, JP) with the PIN photodiode X100-7 SMD (First Sensor AG, Berlin, DE), Raspberry Pi Camera v2 (Raspberry Pi Foundation, Caldecote, Cambridgeshire, UK) light source (0.8 W LED-strip) for imaging, DHT22 integrated environmental sensor suite (Aosong Electronics Co. Ltd, Huangpu District, Guangzhou, CN) for temperature and humidity readings, a real-time WatchDog timer (Brentek International Inc., York, PA, US), and D6F-P0010A1 (Omron Electronics LLC, Hoffman Estates, IL, US) electronic flow-measurement system. One Raspberry Pi (“auxiliary-computer”) running Raspbian v10.18 was dedicated to photography, lighting, temperature, humidity, and electronic flow measurement (EFM) readings, while the second Raspberry Pi (“flight-computer”) controlled radiation measurements, stored in a probed Logger Memobox (Fluke Corporation, Everett, WA, US). T

Conclusion:

With a basic experimental setup implemented as a single small payload on the ISS, it could be shown that the dematiaceous fungus C. sphaerospermum can be cultivated in space while being subjected to the unique microgravity and radiation environment of LEO. Growth characteristics indicated an advantage of cultivation on-orbit compared to the ground control. This could be associated with increased radiation in space, potentially causing a radioadaptive response of the microbe, as has been suggested in analogous Earth-based studies. Further, monitoring radiation throughout the experiment indicated that the melanized fungal biomass may have radioprotective properties in space.

Comment Re:Blast off to Mars in 2026? What are they smokin (Score 2) 47

Radiation on Mars really isn't an issue.

Technologically speaking, the bigger problem is getting people to Mars as they will be exposed to a HUGE amount of cosmic radiation.

An astronaut on a mission to Mars could receive radiation doses up to 700 times higher than on our planet – a major showstopper for the safe exploration of our Solar System.

The issue of the survivability on Mars is entirely moot if you can only deliver soon-to-be corpses.

Comment Re:Windows are cool but (Score 1) 26

What is more likely to be hit by a piece of space junk or micro meteorite, a space station sitting there for years, or a transport vessel just making a quick run up or down ?!

To be fair, it depends on the altitude of the space station. If the ISS was kept at an altitude of 4000 km then the vessel making a quick trip would be more likely to be struck because most of Earth's orbital debris is found below an altitude of 2,000 km. However, the ISS is kept at 400 km and it only becomes more risky up to that altitude.

So, while you are incidentally correct, it is not a mere matter of logical thinking that you present it to be.

Comment Re:Windows are cool but (Score 1) 26

They need to be able to see outside, and glass is the most reliable way to facilitate that.

You're not wrong but there are other passive options that could be more structurally robust like using several optical fibers to create a composite image. You could also use optical elements to radically compress and magnify a larger area. Both of these options minimizes the size of the area needed to transmit the light from outside to inside the capsule using components that require no resources to operate and are more mechanically robust.

I don't know if port windows a generally problematic in space capsule design but there are other options than just having a big hole that are equally reliable. I can only figure that it's not considered to not be a major design challenge but then again, here we are.

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