JATtho

@JATtho@lemmy.world

• ⁨Comment⁩ on ⁨same shit every day, on god⁩ ⁨⁨3⁩ ⁨days⁩ ago⁩:

  Fresh PWR fuel is ~4% U-235 and the rest is non-fissile uranium/cladding. ~95% of the potential energy still locked in the “waste” after spending ~2 years in the reactor. Breeder reactors would mean converting greater fraction of this mass into usable energy.

  Running PWR core has be at +150 Bar to have +300*C outlet temp - so if something goes wrong it goes wrong like Fukushima. The fuel can stay in the core only until economics say running the plant at less than 100% design power isn’t profitable. Every 18/24 months the plant is needs to shutdown for maintance few a weeks to months. I don’t like PWRs.

  “regular, i.e. non-breeder” MSRs that would just use uranium would be a massive improvement - both in safety and efficiency. Heat a massive silo of (secondary coolant) salt to +500*C with MSR, do the reactor repairs while this reserve runs the turbines, resume MSR. The issue is - politics, fear, and too little research in handling molten salts.

• ⁨Comment⁩ on ⁨same shit every day, on god⁩ ⁨⁨3⁩ ⁨days⁩ ago⁩:

  You should look at mitochondria:

  • The power plant of the cell.
  • Runs on a proton-gradient.
  • ATP synthase is essentially a molecular turbine and a generator.
  • oh. a turbine. Damm thing spins ~18000 rpm at medium throttle, pumping out elec- ATP. ATP.

  Oops… it’s turbines all the way down.

• ⁨Comment⁩ on ⁨same shit every day, on god⁩ ⁨⁨3⁩ ⁨days⁩ ago⁩:

  The scientists didn’t joke about that tokamaks will be a great neutron factory/highest neutron flux available. Yes, neutron activation of the reactor walls/components is a problem that we need to solve. However, transmutation of lithium to tritium is required for the reactor to work in the long term, so having a high neutron flux source is a plus in this regard. (and a negative in all aspects of structural integrity…)

  The volume amount of activated material that would come out from tokamaks is fraction compared to the literal tens of tons half-burnt uranium that takes way too long to decay to safe level. The more angrier the radioactivity, the less time it takes to decay away.

• ⁨Comment⁩ on ⁨It's important!⁩ ⁨⁨2⁩ ⁨weeks⁩ ago⁩:

  Now, provide an example that you cannot, is impossible, to translate into French.

  And I’ll accept your claim of unknowing is better than knowing.

• ⁨Comment⁩ on ⁨95% of Companies See ‘Zero Return’ on $30 Billion Generative AI Spend, MIT Report Finds⁩ ⁨⁨3⁩ ⁨months⁩ ago⁩:

  Every technology invented is a dual edge sword. Other edge propulses deluge of misinformation, llm hallucinations, brain washing of the masses, and exploit exploit for profit. The better side advances progress in science, well being, availbility of useful knowledge. Like the nuclerbomb, LLM “ai” is currenty in its infancy and is used as a weapon, there is a literal race to who makes the “biggest best” fkn “AI” to dominate the world. Eventually, the over optimistic buble bursts and reality of the flaws and risks will kick in. (Hopefully…)

• ⁨Comment⁩ on ⁨DIY 4th of July⁩ ⁨⁨4⁩ ⁨months⁩ ago⁩:

  Sure it’s terrifying, but you can start a sparky plasma show in a resilient enough container and keep it going for hours and microwave won’t break. (except maybe overheat.) The microwave will be fine as long as the arcs don’t reach the waveguide cover. (which would risk burning/shorting the magnetron.)

  I have done the microwave grape plasma trick myself and started an arc in a microwave. The current between the two objects goes through a very narrow point, which is enough vaporize the contact point to plasma. This then can grow as the microwave continues to pump more energy into the spark.

• ⁨Comment⁩ on ⁨Google is intentionally throttling YouTube videos, slowing down users with ad blockers⁩ ⁨⁨5⁩ ⁨months⁩ ago⁩:

  So this is it. The enshittification has reached slowlorris levels.

• ⁨Comment⁩ on ⁨Can you clear a straight line of malfunctioning pixels on a phone with a lighter?⁩ ⁨⁨5⁩ ⁨months⁩ ago⁩:

  I spent solid 10min writing an useful answer and then looked up. Now I want my 10mins back.

  hint

  Just wipe the screen clear from the goo, dummy.

• ⁨Comment⁩ on ⁨[XKCD]#3101 Good Science⁩ ⁨⁨5⁩ ⁨months⁩ ago⁩:

  Oh, this is a good one.

• ⁨Comment⁩ on ⁨Hundreds of smartphone apps are monitoring users through their microphones⁩ ⁨⁨7⁩ ⁨months⁩ ago⁩:

  Nah, I’m not that paranoid and I need the mic for calls.

• ⁨Comment⁩ on ⁨Hundreds of smartphone apps are monitoring users through their microphones⁩ ⁨⁨7⁩ ⁨months⁩ ago⁩:

  This might just push my fear of targeted ads enough to give in to my idea of a nearly soundproof box for my phone when I’m not using it. :(