Best I understand it, Iran was walking a line. They would demand concessions in return for not building a nuclear weapon, which only works if you convince everyone that you could if you don't get what you want. This would be part of the latter. All war is misjudgment, and they had to make a judgement about how close to get for maximum leverage without getting too close such that they'd be attacked. Answer from gregaustex on reddit.com
Reddit
reddit.com › r/centrist › what is iran’s intent with 60%-enriched uranium?
r/centrist on Reddit: What is Iran’s intent with 60%-enriched uranium?
June 22, 2025 -
Iran's total enriched U-235 stockpile was ~9300 kilograms including ~400kg enriched to 60%. This is theoretically enough for about 10 nuclear weapons with a bit more refinement. This was up from the 5-8 weapons, estimated 3 months ago.
Curious what members of this sub think of Iran’s uranium development and why.
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Best I understand it, Iran was walking a line. They would demand concessions in return for not building a nuclear weapon, which only works if you convince everyone that you could if you don't get what you want. This would be part of the latter. All war is misjudgment, and they had to make a judgement about how close to get for maximum leverage without getting too close such that they'd be attacked.
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2015 we signed the Iran Nuclear Deal, officially known as the Joint Comprehensive Plan of Action (JCPOA). Before the deal was signed, Iran had approximately: 10,000 kg of 3.5% uranium 370 kg of 20% uranium 0 kg of 60% uranium 0 kg of 90% uranium https://www.armscontrol.org/factsheets/joint-comprehensive-plan-action-jcpoa-glance After the deal was signed, as many as 3,000 inspections happened per year between the six different countries involved, as many as 10 per day. Iran was found to be in continuous compliance during inspections with agreements on acceptable levels of uranium. 2018 In 2018 before the US went back on our nuclear agreement, Iran had approximately: 300 kg of 3.5% uranium 0 kg of 20% uranium 0 kg of 60% uranium 0 kg of 90% uranium Then the president did this: https://trumpwhitehouse.archives.gov/briefings-statements/president-donald-j-trump-reimposing-sanctions-lifted-unacceptable-iran-deal/ 2025 Iran currently has approximately: 215 kg of 3.5% uranium 275 kg of 20% uranium 409 kg of 60% uranium 0 kg of 90% uranium
The Jerusalem Post
jpost.com › middle-east › iran-news › article-888623
Witkoff: Iran openly admitted to having enough 60% enriched uranium to create nuclear material
Iranian negotiators told the US that they possess enough uranium enriched to 60% to create nuclear material sufficient for bombs, the Trump administration's special envoy Steve Witkoff told Sean Hannity on Fox News on Monday night.
The Economic Times
m.economictimes.com › business news › news › trending
US–Israel bombed the nuclear sites, but not the nuclear threat: Iran still holds 400kg of enriched Uranium, enough to make 10 N-bombs - The Economic Times
June 24, 2025 - But 400kg of enriched uranium—enough to build up to ten atomic bombs—is still unaccounted for. ... Vice President JD Vance confirmed the missing material during an interview with ABC News, saying the administration “would work in the coming ...
Weizmann Institute
davidson.weizmann.ac.il › home › articles › science panorama › understanding uranium enrichment
Understanding Uranium Enrichment | Magazine | Davidson Institute ...
June 22, 2025 - Some estimates suggest that Iran could produce enough fissile material for one nuclear bomb within a few weeks, and the total quantity already enriched could be sufficient for up to ten bombs.
Sky News
news.sky.com › story › even-after-us-strikes-iran-may-still-have-the-ability-to-make-a-nuclear-bomb-13387019
Even after US strikes, Iran may still have the ability to make a nuclear bomb | World News | Sky News
June 22, 2025 - United Nations nuclear inspectors ... 90% U-235. And those 400kg would yield enough of that weapons-grade uranium to make nine nuclear weapons, the inspectors concluded....
Bulletin of the Atomic Scientists
thebulletin.org › home › nuclear risk › nuclear weapons › iran can still build nuclear weapons without further enrichment. only diplomacy will stop it
Iran can still build nuclear weapons without further enrichment. Only diplomacy will stop it - Bulletin of the Atomic Scientists
July 2, 2025 - But one critical point continues to be largely and inexplicably overlooked: Iran’s stockpile of over 400 kilograms of highly enriched uranium (HEU)—enriched to 60 percent uranium 235—is weapon usable. This means that Iran’s HEU—which the International Atomic Energy Agency (IAEA) reported in June as being unaccounted for following Israel’s initial air strikes and which may have been moved to secure locations before the attacks—could be used directly to make bombs without requiring further enrichment.
arXiv
arxiv.org › html › 2507.20390v1
Improvised Nuclear Weapons with 60%-Enriched Uranium
1 week ago - In this work we show that as little as 40 kg of 60%-enriched uranium can be used to build a crude nuclear weapon with a kiloton yield. While too large to fit on a missile, such a weapon could be delivered by shipping container. This analysis is motivated by the June 2025 Israeli and US attacks ...
NDTV
ndtv.com › home › world news › fears over iran's missing 400kg of uranium. enough to make 10 nukes, says us
iran nuclear stockpile 400kg uranium enriched 60 percent missing, iran-israel war, donald trump jd vance
June 24, 2025 - A 400kg stockpile of uranium - enough to make up to 10 nuclear weapons, United States Vice President JD Vance told American broadcaster ABC News - is unaccounted for after Washington dropped six 'bunker busters' on three Iranian nuclear facilities ...
Northeastern Global News
news.northeastern.edu › home › is iran’s nuclear program producing energy or developing weapons? a northeastern expert explains the science of nuclear power
Is Iran’s nuclear program producing energy or developing weapons? A Northeastern expert explains the science of nuclear power
June 20, 2025 - The U.N.’s International Atomic Energy Agency recently criticized Iran’s “general lack of co-operation” and warned that the country had enough enriched uranium to be near weapons grade and could potentially make several nuclear bombs. Concerns that Iran could start making nuclear weapons have grown as Iran has accumulated more than 400 kg (880 pounds) of uranium enriched to 60%. The IAEA reported that Iran is in breach of the 2015 Joint Comprehensive Plan of Action it signed with several major countries stating that it would not surpass the 3.67% uranium enrichment level limit.
arXiv
arxiv.org › abs › 2507.20390
[2507.20390] Improvised Nuclear Weapons with 60%-Enriched Uranium
July 27, 2025 - Abstract:In this work we show that as little as 40 kg of 60%-enriched uranium can be used to build a crude nuclear weapon with a kiloton yield. While too large to fit on a missile, such a weapon could be delivered by shipping container.
Wikipedia
en.wikipedia.org › wiki › Enriched_uranium
Enriched uranium - Wikipedia
1 week ago - Enriched uranium is a critical component for both civil nuclear power generation and military nuclear weapons. Low-enriched uranium (below 20% 235U) is necessary to operate light water reactors, which make up almost 90% of nuclear electricity generation. Highly enriched uranium (above 20% 235U) is used for the cores of many nuclear weapons, as well as compact reactors for naval propulsion and research, as well as breeder reactors.
Reddit
reddit.com › r/nuclearweapons › iran's 60% uranium stockpile: can bombing stop a nuclear weapon?
r/nuclearweapons on Reddit: Iran's 60% Uranium Stockpile: Can Bombing Stop a Nuclear Weapon?
October 9, 2024 -
Iran's nuclear program has raised global concerns, particularly due to its stockpile of uranium enriched to 60%. This level of enrichment brings Iran closer to weapons-grade material, as going from 60% to 90% enrichment is a relatively simple and fast process. Iran's 60% stockpile could be enough for four to five nuclear bombs.
Could Bombing Stop Iran?
A military strike by Israel or the U.S. on Iran’s nuclear facilities might aim to destroy key infrastructure, such as centrifuges and enrichment plants. However, this would not necessarily prevent Iran from building a bomb. The stockpile of 60% enriched uranium would likely survive such an attack, and Iran could further enrich it to 90% even without fully functioning facilities.
While bombing might delay Iran's progress, it wouldn’t eliminate the core issue: the uranium stockpile. As long as this stockpile exists, Iran could continue its nuclear ambitions using its stored materials, making military strikes a temporary solution at best.
Iran’s 60% enriched uranium stockpile poses a significant challenge to any military strategy. Even if Iran’s facilities are bombed, the stockpile would still allow the country to produce nuclear weapons relatively fast. A comprehensive solution will require addressing both the stockpile and Iran’s ability to rebuild its infrastructure.
Any ideas?
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The core issue isn't its uranium stockpile, but that it's not doing anything in violation of the NPT. Being a near-nuclear state isn't forbidden under the treaty. The U.S. agrees with that position, because otherwise they wouldn't have negotiated the JCPOA ("The Iran nuclear deal") back in 2015, which Trump withdrew from in late 2017. Despite the democrats critiquing the withdrawal the Biden administration made no efforts to reestablish the deal, and here we are. So no, the answer isn't to bomb Iran, but to work out a deal they're willing to accept.
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Only if Maverick is appointed Team Leader!
Center for Arms Control and Non-Proliferation
armscontrolcenter.org › home › fact sheet: uranium enrichment: for peace or for weapons
Fact Sheet: Uranium Enrichment: For Peace or for Weapons - Center for Arms Control and Non-Proliferation
August 26, 2021 - It would take a very long time to accumulate a sufficient quantity of plutonium for a nuclear bomb, so they do not represent a major proliferation threat. ... The simple answer is that enriching uranium to 20% represents about 90% of the effort needed to produce weapons grade fissile material.
Ynet News
ynetnews.com › health_science › article › by6t11x8eee
From yellowcake to fuel: The process of uranium enrichment explained
June 24, 2025 - Some estimates suggest that Iran could produce enough fissile material for one nuclear bomb within a few weeks, and the total quantity already enriched could be sufficient for up to ten bombs.
Reddit
reddit.com › r/nuclear › can we stop saying that 60% enrichment is exclusively for bombs?
r/nuclear on Reddit: Can we stop saying that 60% enrichment is exclusively for bombs?
June 17, 2025 -
Anyone qualified to operate Naval reactors knows better.
Quora
quora.com › How-many-kg-of-enriched-uranium-is-in-a-nuclear-bomb
How many kg of enriched uranium is in a nuclear bomb? - Quora
Answer (1 of 5): Well, let’s speak of plutonium. Very few real uranium weapons were ever built, as plutonium is about 5 times more weight-efficient. First of all, there are fissile elements and there are fissionable elements. Fissiles can sustain internal chain reactions, supplying their ...
Iran Watch
iranwatch.org › our-publications › articles-reports › irans-nuclear-timetable-weapon-potential
Iran's Nuclear Timetable: The Weapon Potential | Iran Watch
Iran's enriched uranium stockpile already contains sufficient uranium enriched to 60% U-235 to fuel up to eight nuclear warheads with further enrichment.[3] The estimate also assumes that the IR-1 centrifuges would perform at the same rate they have in the past and that the IR-2m, IR-4, and ...
Institute for Science and International Security
isis-online.org › isis-reports › entering-uncharted-waters-irans-60-percent-highly-enriched-uranium
Entering Dangerous, Uncharted Waters: Iran’s 60 Percent Highly Enriched Uranium | ISIS Reports | Institute For Science And International Security
As soon as mid-to-late April, Iran is expected to reach a new dangerous, destabilizing threshold, having enough highly enriched uranium (HEU) to fashion a nuclear explosive, about 40-42 kilograms (kg) of 60 percent enriched uranium (uranium mass).1 With this quantity, an enrichment level of ...
Reddit
reddit.com › r/explainlikeimfive › eli5. enriched uranium. what is it? what is the process of enriching? how dangerous is it on its own (not turned into weapons, etc)?
r/explainlikeimfive on Reddit: ELI5. Enriched Uranium. What is it? What is the process of enriching? How dangerous is it on its own (not turned into weapons, etc)?
June 22, 2025 -
To clarify the danger question: what are the dangers of enriched Uranium (would that be a block? Many small pellets?) as it is stored? Like could it be safely handled by a person with some rubber gloves? Or does it require storage in concrete or water pools with time restricted access to the area by personnel?
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There are two types of uranium (there are more but there are 2 main types found in nature or if the ground) There is U235 and U238. The two are chemically identical, that means you can't use chemical reactions to separate them. In nature they come prepackaged together where you get a little bit of U235 and a LOT of U238. Like lucky charms is mostly regular cereal and a bit of marshmallow. Except in this case it's like 100 or 200 pieces of cereal for every 1 marshmallow. U235 is the explodey type of uranium U238 is the non explodey type. You can also think of them as real lego 2x2 bricks and fake Lego 2x2 bricks. Except the fake Lego is a prefect replica of real Lego in every way so you can't determine if it is fake or not by checking how well the pieces fit together with other pieces or checking the color or anything. The one flaw(difference) is that the fake 2x2 brick is SLIGHTLY heavier than the real Lego bricks by about 2%. If you had two bricks one real one fake side by side you just have to weigh them on a scale to check which is real or fake. With Lego bricks, it's easy because you can pick them up with your hands. With uranium in real life you can't check atom by atom so what do you do. Imagine you're a giant the size of godzilla, you can't pick up a single Lego brick, so that's it if the question. Well what can we do to make use of the fact that the single differentiating factor is one of these bricks are slightly denser than the other. Let's think of a different example and a different effect. What do hot air balloons, oil/water, submarines have in common? Buoyancy, less dense things tend to float on top of denser things. But here's the problem. Uranium is a solid. The atoms in the solid don't rearrange themselves easily like a fluid does. OK so let's turn the uranium into a liquid then. Let's melt it down and see what floats to the top, that should be the explodey type right? Well not so fast, not only would melting it down be extremely difficult/annoying/dangerous, we're talking about only a 2% difference in density between the two atoms especially as a liquid when there are still significant forces between each atomic nuclei. That's not REALLY going to be enough to separate the two. OK so is there a better way. Well gasses are better than liquid for our purposes because the forces between each particle are smaller. But wait, if melting uranium into a fluid was difficult, surely boiling that liquid to turn it into a gas is going to be even more difficult/dangerous...and it would be, but we can take advantage of something else. Chemical reactions. If we combine uranium with something else where the resulting compound is a gas at room temperature, then we don't need to deal with this super hot mono atomic uranium gas. That's precisely what is done, the chemical we combine uranium with is fluorine (itself an extremely dangerous chemical) and we get uranium hexafluoride. So we just take this uranium hexafluoride gas and leave it sitting still in a box for a while to settle and skim off the top right? Weeellllll not really. A 2% change in density STILL isn't going to really be enough to get good separation. So what can we do. We need to artificially make the heavy bits feel more heavy so they sink better. How do we do this? By spinning it really fast inside of a tube. You know how it you spin your hand around really fast your hand gets all red because am the blood pools to the outside of that spin? Well we're doing the same thing. If we spin our tube off uranium hexafluoride really fast everything inside gets heavier but the marginal difference in force between the fake and real Legos... Err... U235 and U238 particles increases. Imagine if each particle of U235 weighed 100, and each U238 particle weighed 102, there's really only 2 units of weight/force difference between the two, but if you spin the tube so fast the particles inside feel 10x heavier then there will be a 20 unit difference in force helping to separate the two types. Even do, you'll find that after doing this you don't get a clean separation. If the original proportion of U235 vs the total was like 0.5%,after the spinning trick you might get like 1%. Not nearly enough. But what you CAN do is take that 1% concentration gas and put it into another tube and do it again and get it to like 2%.then you can do it again, and again, and again... Until you get the concentration you want. Once you have your target concentration you can do another chemical reaction and get rid of the fluorine and get pure uranium again. Once you have that a bomb is literally just bringing two pieces of uranium together quickly so the total mass is above some figure. So if this entire process is what is needed to make a bomb, which parts are easy and which parts are hard. Well getting uranium ore itself is KINDA easy KINDA hard. If you're a country that has lots of this stuff, then it's easy, if not then it's hard. Is turning the ore into pure uranium hard? Turns out the answer is no. Is it hard to turn the refined uranium (refined but unseparated) into uranium hexafluoride? Turns out no. Is it hard to turn the uranium hexafluoride back into pure uranium? Also no. Is it hard to make a device that just slams two pieces of uranium smaller than the magic number together such that when combined the total is above the magic number? Also no, this is actually one of the easiest parts of the process. In fact, in the Manhattan project they were SO CONFIDENT that it would be easy and that it would work, they didn't even bother testing it. They just put it together and dropped the bomb because it was THAT simple and easy and reliable. It turns out the hard part is the spinny tube separation bit. Those things have to spin super super super fast and be balanced(or else the cylinder will break itself) and making those spinny tubes is really really difficult. A country can get all the uranium ore they want but if they can't separate them then all they have are some expensive rocks. Once you have enough enriched uranium a couple dudes can put a bomb together in their back yard so if you wait till that stage, you've already lost the game.
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You've gotten some good answers. I'll address how dangerous it is. You can safely hold enriched uranium with gloved hands. Enriched Uranium only turns spicy when pieces of it are slammed at each other at very high speeds. Then the neutrons start smashing and creating an uncontrolled chain reaction like a pool table.