Comment on Reactor goes brrr
roguetrick@lemmy.world 2 months ago
Run low on water, stop reaction. Fission products keep getting hot even though reaction stopped. Not enough water to cool them off. Shit.
pruwybn@discuss.tchncs.de 2 months ago
ThrowawayPermanente@sh.itjust.works 2 months ago
This scene was really outstanding
xspurnx@lemmy.dbzer0.com 2 months ago
What’s that from?
pruwybn@discuss.tchncs.de 2 months ago
The Chernobyl miniseries on HBO.
xspurnx@lemmy.dbzer0.com 2 months ago
Ah, thanks. I’ll check it out.
Kaelygon@lemmy.world 2 months ago
thankfully modern ones like molten salt reactors have passive safety, where they stop the reaction if overheating occurrs.
Diplomjodler3@lemmy.world 2 months ago
And are those modern molten salt reactors in the room with us now?
UnderpantsWeevil@lemmy.world 2 months ago
Diplomjodler3@lemmy.world 2 months ago
2 MW. Fantastic. And only 8 years until it reaches continuous operation. How long will it be before that is anywhere near utility scale?
synapse1278@lemmy.world 2 months ago
Ah yes, the passive safety of the molten salt spontaneously catching on fire when in contact with air and can’t be put out with water.
roguetrick@lemmy.world 2 months ago
You can’t stop decay heat. It’s just molton salt reactors can operate at much higher temperatures and if it loses active cooling passive cooling with just air and blackbody radiation while the salt passively circulates could be enough.
PieMePlenty@lemmy.world 2 months ago
Isn’t molten salt just energy storage? Heat up salt when you have excess of energy, take heat out when you need it. The worst disaster there is just the container melting.
Agent641@lemmy.world 2 months ago
No, there are molten salt thermal batteries, but they aren’t the same as molten salt nuclear reactor. In a nuclear reactor the fissile material is dissolved in the salt for some reason, and the molten salt acts as a moderator or something. Apparently its safe because if the reactor power fails, the salt ‘freezes’ which prevents fission from occurring. Seems like complex extra steps to me but what do I know.
roguetrick@lemmy.world 2 months ago
“Can’t have a meltdown when you’ve already melted the fuel” is pretty much the whole idea there.
JATtho@lemmy.world 2 months ago
MSRs have negative temperature reactivity coefficient and outlet temps around 700C at atm pressure. PWR is at measly 300C and 150 Bar.
If all control is lost, the salt expands as it heats up pushing the expanded volume out from the reactor core. The fission stops once the fuel is leaves the core region where the moderator is. Reverse is also true: you pull heat off from the loop, so the fuel-salt becomes denser, increasing reactivity. MSRs can naturally “follow” the load, if done right.
humanspiral@lemmy.ca 2 months ago
there’s no active commercial molten salt reactors.
Experimental ones were all shut down within 5-10 years because corrosion makes them uneconomical to repair.
Fukushima’s case, which is the last significant nuclear incident in past 13 years
Zaporizhzhia in Ukraine has military attacks against it, with intent of fundraising and politically blaming a disaster on the side that weapons providers, and the media they own, love to hate. Our media normalizes civil war as a response to Netanyahu not having his favorite ruler appointed.
OmegaLemmy@discuss.online 2 months ago
Thorium Thorium Thorium Thorium Thorium
Agent641@lemmy.world 2 months ago
Uranium it is, then!
Rakonat@lemmy.world 2 months ago
Turn water back on suddenly and realize what happens when water touches an object many times warmer than it’s boiling point.
Agent641@lemmy.world 2 months ago
Just throw some sand and boron on it, she’ll be right mate.
BudgetBandit@sh.itjust.works 2 months ago
That’s why you have a closed water system and multiple failsaves.
Unless you want to cyka your last blyat.
dufkm@lemmy.world 2 months ago
What do I need to roll to pass the failsaves?
ICastFist@programming.dev 2 months ago
Roll yourself up in a blanket of lead and concrete