this post was submitted on 05 Nov 2023
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[–] pete_the_cat@lemmy.world 13 points 1 year ago* (last edited 1 year ago) (3 children)

They were hardened as they were built in the 70s, 80s, and 90s. They all pretty much have 30 foot thick concrete walls in the containment building that houses the reactor(s). The Nuclear Regulatory Commission doesn't want something like Chernobyl to happen, which had no containment building, just a normal structure. Even if a US reactor goes supercritical and melts down, there is about a <1% chance of any radiation leaking out. If the reactor exploded the building would withstand the explosion and vent the pressure into the atmosphere, which may contain small amounts of radioactive alpha and beta particles. The only nuclear accident we've ever had was Three Mile Island in Pennsylvania and that was because the safety valve in the containment building got stuck open after venting the pressure after one of the reactors went critical.

[–] Cethin@lemmy.zip 9 points 1 year ago* (last edited 1 year ago) (3 children)

Even three mile island wasn't as bad as most people seem to think. It was used as an Anti-nuclear propoganda piece, but it wasn't that bad. The other reactors there continued operating for several decades after, though I think they're now all shut down.

(This is true for Chernobyl too though, so I guess it really doesn't say a whole lot about severity.)

[–] captain_aggravated@sh.itjust.works 7 points 1 year ago (1 children)

Most of what the Three Mile Island accident did was use up half the power plant. Problem is it spooked a lot of folks, partially due to unfortunate timing. The movie The China Syndrome had recently come out, and a lot of people expected it to go as bad as that.

It really didn't help when the Soviets blew the roof off a reactor seven years later.

[–] AngryCommieKender@lemmy.world 1 points 1 year ago* (last edited 1 year ago) (1 children)

If the US government hadn't classified the event, the reactor that they intentionally melted down in the late 50s/early 60s in the TVA would have been proof that China Syndrome was based on bad math. That incident is why the Army Corps of Engineers lost their nuclear power program. Didn't anyone else wonder why the Army Corps of Engineers built a bunch of nuclear reactors in the 50s and 60s for the TVA, and then they never worked on nuclear power again? The Navy still has their nuclear power program.....

[–] captain_aggravated@sh.itjust.works 3 points 1 year ago (1 children)

You think the general public is able to understand or care that the math checks out in a disaster movie?

[–] AngryCommieKender@lemmy.world 1 points 1 year ago* (last edited 1 year ago)

General public wouldn't have freaked out if the government hadn't been lying at worst, and misrepresenting data at best, about a lot of things regarding nuclear technology.

[–] pete_the_cat@lemmy.world 3 points 1 year ago* (last edited 1 year ago)

There was practically zero impact to the surrounding environment after the TMI leak, I think I read that radiation was practically undetectable after like 6 months.

This is not true for Chernobyl though. That place is fucked and they needed to encase the reactor building twice in order to stop it from leaking harmful radioactive particles (x-ray and gamma particles, alpha and beta particles are less worrisome but still harmful in large doses IIRC). Pripyat is still hot and will be for like a hundred years or more, tons of people died either immediately after the explosion or shortly thereafter. Those that didn't die within the first few months developed serious health issues and cancers years later. It's literally the worst nuclear disaster in history.

[–] Madison420@lemmy.world 3 points 1 year ago

Very true, the windscale fire is probably a better comparison between incompetence and release.

Yes three mile shut down production completely in 2019 after running at a loss for years.

[–] AngryCommieKender@lemmy.world 4 points 1 year ago* (last edited 1 year ago) (1 children)

Three Mile Island isn't the only incident, just the only accident, we have had. The only true meltdown was intentionally caused by the Army Corps of Engineers in the late 50s to test if China Syndrome was real. Thankfully someone did the math wrong so there was no danger of the core melting to the center of the earth and detonating. This is why the TVA was the last time that the Army Corps of Engineers was allowed to administer the things. Congress was understandably a bit upset to find out that they basically flipped a coin on destroying civilization at the very least.

[–] pete_the_cat@lemmy.world 2 points 1 year ago

Yeah, I meant "something that we didn't cause intentionally".