Robot finds possible melted nuclear fuel at Fukushima
74 replies, posted
[t]https://ichef-1.bbci.co.uk/news/660/cpsprodpb/178DA/production/_97047469_48b78b18-011e-40ff-a55f-24ae62539f47.jpg[/t][t]https://ichef-1.bbci.co.uk/news/624/cpsprodpb/E082/production/_97047475_e30348d5-2cd2-4f6e-bb47-8902325fa0b9.jpg[/t]
[QUOTE]An underwater robot has captured what is believed to be the first images of melted nuclear fuel deposits inside Japan's stricken Fukushima nuclear plant, its operator Tepco says.
Large amounts of solidified lava-like rocks and lumps in layers were seen underneath its unit three reactor.
If confirmed, it would be a major milestone in the clear-up operation.
...
"There is a high possibility that the solidified objects are mixtures of melted metal and fuel that fell from the vessel," a spokesman said.
Some of the objects appeared like icicles hanging around a control rod mechanism, which is attached to the bottom of the reactor's pressure vessel holding the core, the company said.
Lumps of material that appeared to have melted and re-solidified near the wall of the pedestal, a concrete structure supporting the pressure vessel, were also captured on camera.
...
No-one died directly in the Fukushima disaster. However, three former Tepco executives are currently on trial on charges of negligence resulting in death and injury of more than 40 patients evacuated from a hospital near the plant.
[/QUOTE]
[url]http://www.bbc.co.uk/news/world-asia-40696303[/url]
Those pics are creepy as fuck
So basically the [url=http://rarehistoricalphotos.com/the-elephant-foot-of-the-chernobyl-disaster-1986/]elephant's foot[/url] of fukushima?
[quote]No-one died directly in the Fukushima disaster. However, three former Tepco executives are currently on trial on charges of negligence resulting in death and injury of more than 40 patients evacuated from a hospital near the plant.[/quote]
I think that's the first time I've ever seen that statement in a mainstream media outlet.
Imagine the anomalies down there...
so basically the moral of the story is "don't be criminally negligent with nuclear power", something the Fukushima lot somehow didn't seem to get after Chernobyl.
I hope the executives see jail time to make a very clear statement.
[QUOTE=ironman17;52499177]Imagine the anomalies down there...[/QUOTE]
Wish Granter?
[QUOTE=Str4fe;52499062]So basically the [url=http://rarehistoricalphotos.com/the-elephant-foot-of-the-chernobyl-disaster-1986/]elephant's foot[/url] of fukushima?[/QUOTE]
kind of but these are probably much smaller and under water so the radiactivity is contained somewhat, also all of this is still within the containment vessel around the plant
[QUOTE=Psychokitten;52499314]Wish Granter?[/QUOTE]
HAPPINESS FOR EVERYONE, FREE, AND LET NO-ONE BE LEFT BEHIND!
If only.
[QUOTE=ironman17;52499177]Imagine the anomalies down there...[/QUOTE]
Ok this is a stupid thing to get mad over but I'm a stupid man so here I go. The anomalies in S.T.A.L.K.E.R. are not caused by nuclear radiation, the Chernobyl exclusion zone is just a setting. All the supernatural shit in S.T.A.L.K.E.R. was caused by a crazy psychic experiment called the Common Consciousness. It went wrong and basically fucked up reality in the zone.
You're right. It is a silly thing to get mad over. Because it's just a joke.
[highlight](User was banned for this post ("Shitposting - Shit video game reference and terrible joke" - Reagy))[/highlight]
Jokes are funny
praise the monolith
[highlight](User was banned for this post ("Shitpost - Hahaha videogames references!" - Reagy))[/highlight]
[QUOTE=ironman17;52499377]You're right. It is a silly thing to get mad over. Because it's just a joke.[/QUOTE]
This response is very similar to the response of, "I was only pretending to be retarded, jokes on you."
[QUOTE=Instant Mix;52499283]so basically the moral of the story is "don't be criminally negligent with nuclear power", something the Fukushima lot somehow didn't seem to get after Chernobyl.
I hope the executives see jail time to make a very clear statement.[/QUOTE]
The history of nuclear power is riddled with negligent behavior. It's a wonder we haven't had more disasters.
[QUOTE=Alxnotorious;52499461]The history of nuclear power is riddled with negligent behavior. It's a wonder we haven't had more disasters.[/QUOTE]
so is human history in general. but here we are.
[QUOTE=Broguts;52499370]Ok this is a stupid thing to get mad over but I'm a stupid man so here I go. The anomalies in S.T.A.L.K.E.R. are not caused by nuclear radiation, the Chernobyl exclusion zone is just a setting. All the supernatural shit in S.T.A.L.K.E.R. was caused by a crazy psychic experiment called the Common Consciousness. It went wrong and basically fucked up reality in the zone.[/QUOTE]
its pretty easy to see how people can confuse what caused it
i doubt most people even pay attention to the lore
[editline]23rd July 2017[/editline]
[QUOTE=Alxnotorious;52499461]The history of nuclear power is riddled with negligent behavior. It's a wonder we haven't had more disasters.[/QUOTE]
Oil has been riddled with far more, and worse disasters. If you want to see negligent behavior just look towards that.
Personally I think this is why we can't remove regulations from the nuclear industry in an effort to help reduce costs. These guys knew this could happen years before it did, and decided to do nothing. 200,000 people shouldn't of had their lives impacted in such a drastic way because some company decided $$$ was more important. Anything that can have that kind of effect on the local population should be regulated, and should be kept a much closer eye on. Be it nuclear, oil, or anything else.
[QUOTE=Morgen;52499856]Personally I think this is why we can't remove regulations from the nuclear industry in an effort to help reduce costs. These guys knew this could happen years before it did, and decided to do nothing. 200,000 people shouldn't of had their lives impacted in such a drastic way because some company decided $$$ was more important. Anything that can have that kind of effect on the local population should be regulated, and should be kept a much closer eye on. Be it nuclear, oil, or anything else.[/QUOTE]
Nobody here thinks it should be deregulated.
What people here have a massive beef with, is people scaremongering it as a whole, since the only stable alternative is fossil fuels.
And the scaremongering leads inevitably to development, research and eventual construction of safer, more reliable and less radioactive waste producing designs to be hindered or outright halted.
[QUOTE=Van-man;52499896]Nobody here thinks it should be deregulated.
What people here have a massive beef with, is people scaremongering it as a whole, since the only stable alternative is fossil fuels.
And the scaremongering leads inevitably to development, research and eventual construction of safer, more reliable and less radioactive waste producing designs to be hindered or outright halted.[/QUOTE]
People on Facepunch tend to bring up that the nuclear industry is over-regulated quite often. Of course the scaremongering is a load of rubbish though. If nuclear power is done right, and maintained properly then it's a great source of clean power that should be developed more.
[QUOTE=Broguts;52499370]Ok this is a stupid thing to get mad over but I'm a stupid man so here I go. The anomalies in S.T.A.L.K.E.R. are not caused by nuclear radiation, the Chernobyl exclusion zone is just a setting. All the supernatural shit in S.T.A.L.K.E.R. was caused by a crazy psychic experiment called the Common Consciousness. It went wrong and basically fucked up reality in the zone.[/QUOTE]
never knew this
i assumed it was the nuclear radiation
[QUOTE=Morgen;52499911]People on Facepunch tend to bring up that the nuclear industry is over-regulated quite often. Of course the scaremongering is a load of rubbish though. If nuclear power is done right, and maintained properly then it's a great source of clean power that should be developed more.[/QUOTE]
ngl don't think I've ever seen a single thread here about nuclear stuff talking about deregulation
if anything all this shit proves is that we should see tighter regulations and safety checks[b] BUT [/b]reducing the media hysteria and common "nuclear is bad" shite we hear all too often that discredits nuclear as a reasonable, stable power source up until fusion is figured out.
[quote]No-one died directly in the Fukushima disaster. However, three former Tepco executives are currently on trial on charges of negligence resulting in death and injury of more than 40 patients evacuated from a hospital near the plant.[/quote]
That's interesting. Causing a nuclear meltdown apparently isn't a crime, the crime is that people died during the evacuation. Well fuck at least someone is being charged for something.
[QUOTE=Broguts;52499370]Ok this is a stupid thing to get mad over but I'm a stupid man so here I go. The anomalies in S.T.A.L.K.E.R. are not caused by nuclear radiation, the Chernobyl exclusion zone is just a setting. All the supernatural shit in S.T.A.L.K.E.R. was caused by a crazy psychic experiment called the Common Consciousness. It went wrong and basically fucked up reality in the zone.[/QUOTE]
Yeah the Chernobyl Exclusion Zone was only chosen because it was a secure area, abandoned, and radiation kept most people away. It was just a good place to hide until they made it worse by creating a completely unrelated accident on the same location.
[QUOTE=Str4fe;52499062]So basically the [url=http://rarehistoricalphotos.com/the-elephant-foot-of-the-chernobyl-disaster-1986/]elephant's foot[/url] of fukushima?[/QUOTE]
Not quite. These images are of inside the reactor vessel (of Unit 3) - while it is generally believed that some amount of molten fuel and core melted through the reactor vessels, this shows what's left inside the reactor vessel, and only the area where the actual fuel rods should be. (At least, that's what some Japanese-language diagrams say, and I can't find translations nor translate it myself)
There probably is an "elephant's foot"-like formation under each of the three reactors, but so far I haven't seen any pictures of it. I don't think anyone has - that area is going to be the most incredibly radioactive.
Another substantial difference is that Fukushima had a very thick containment vessel wrapped around the reactor vessels. If my translation is right, the bottom of it is [I]seven meters[/I] of reinforced concrete, far more than it should have been able to melt through. Fukushima's containment vessels are cup-shaped* - not much protection up top, so it doesn't prevent all radioactive release, but it keeps the core from melting through into the groundwater. Chernobyl didn't have a real containment vessel, so the floor beneath the reactor was just a normal industrial floor, thick enough to support the weight but not designed to withstand a dump of radioactive lava. The elephant's foot contains a large amount of molten and resolidified concrete, while Fukushima's will probably have little. Which is good - the Chernobyl foot is degrading, and producing large amounts of highly-radioactive dust, due to how the silicates in it react. If Fukushima's is mostly uranium, zircalloy and steel, it should be more stable, materially speaking.
* This was standard practice with early boiling-water reactor designs. Pressurized-water reactors (except Chernobyl-type...) and modern BWR designs use full enclosure containment vessels, that can theoretically withstand large amounts of pressure and would not expose anything that melts through the reaction vessel to the outside atmosphere.
[QUOTE=Instant Mix;52499283]so basically the moral of the story is "don't be criminally negligent with nuclear power", something the Fukushima lot somehow didn't seem to get after Chernobyl.
I hope the executives see jail time to make a very clear statement.[/QUOTE]
To be fair, they were hit with an earthquake and then a tsunami and Chernobyl was basically pure negligence and incompetence with an older poorer design
[QUOTE=TheTalon;52500427]To be fair, they were hit with an earthquake and then a tsunami and Chernobyl was basically pure negligence and incompetence with an older poorer design[/QUOTE]
aye but the reason for the main reactor failure was due to the backup and the backup-backup pumps failing, mostly due to lack of maintenance.
[QUOTE=Van-man;52499896]Nobody here thinks it should be deregulated.
What people here have a massive beef with, is people scaremongering it as a whole, since the only stable alternative is fossil fuels.
And the scaremongering leads inevitably to development, research and eventual construction of safer, more reliable and less radioactive waste producing designs to be hindered or outright halted.[/QUOTE]
He's talking about me. I've said that before, but definitely not for design or licensing regulations. But when people hear someone say "we need a little less regulation in the nuclear industry", people start to get scared.
The issue is that new plants are built under what's called a combined operating license (COL). This means that the NRC is inserted into the ENTIRE construction process, and therefore they don't need to spend years and years after the units are built inspecting them and going over them because it was all done during construction. However, for a COL, the entire site operates as if the units are live and there is fuel in them, even though the reactor cores aren't even in and fuel is still years from being delivered.
Every piece of the unit, from the pipes and beams, to the concrete walls, even down to the light switches are all classified as either "safety related" or "non-safety related". Everything that has a direct role in the operation and safety of the reactor core is deemed safety related. Everything else is non-safety related.
The regulations I'm talking about are construction regulations and rules on non-safety related things that make construction much more difficult than it has to be, especially on temporary items such as water keg stands that are going to be thrown away after construction, which have to be built as if the plant is in operation.
There's just a lot of unnecessary hoops to jump through on tasks that won't make a difference to to plant at the end.
[QUOTE=Instant Mix;52500476]aye but the reason for the main reactor failure was due to the backup and the backup-backup pumps failing, mostly due to lack of maintenance.[/QUOTE]
IIRC the problem was that the back-up generators that ran the pumps were located in a basement that could easily be flooded, and to nobody's surprise they did. Gas/diesel generators don't work worth a shit underwater. No power, no pumps. No pumps, no water. No water, you get a melt-down.
[QUOTE=Instant Mix;52500222]ngl don't think I've ever seen a single thread here about nuclear stuff talking about deregulation
[/QUOTE]
Can't name names (callout bans) but I've seen at least three posters praise deregulation in the nuclear sector.
[QUOTE=Zero-Point;52500611]IIRC the problem was that the back-up generators that ran the pumps were located in a basement that could easily be flooded, and to nobody's surprise they did. Gas/diesel generators don't work worth a shit underwater. No power, no pumps. No pumps, no water. No water, you get a melt-down.[/QUOTE]
Exactly this. They were warned by many researchers, many years in advance that specifically a tsunami can cause huge problems to the entire power plant, but no, TEPCO and its short-sighted executives do not see the damages they will have to pay for when stuff like this accident happens, in the end they have to pay much, much more than if they improved the design.
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