I mean no harm.

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Cake day: July 4th, 2023

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  • 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.



  • 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 a 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.





  • JATth@lemmy.worldtoLemmy Shitpost@lemmy.worldDIY 4th of July
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    5 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 the 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.









  • JATth@lemmy.worldtoScience Memes@mander.xyzIt's the law!
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    8 months ago

    Send it through the earth, you can reduce it theoretically to 42.5ms

    This isn’t as ridiculous as it sounds and you just need a neutrino-beam… which has a horrible bandwidth (of 0.1 bits/s) plus the ridiculous upfront cost of running two particle-accelerators for a full-duplex link. (Google it up, this exists.)





  • JATth@lemmy.worldtoAsklemmy@lemmy.mlFavorite horror movie?
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    1 year ago

    100% Nope: A episode from supernatural, where ghouls half way succeed to eat Sam. (I consider it as the most gruesome horror I have ever seen, and I don’t think I have the stomach to see it ever again. The blood draining is a … no.)

    Yellow brick road on otherhand hits the weird places spot of SCP, which I can’t get enough. (not horror really, but still)