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Kodak ran a nuclear device in its basement for decades
- pinewurst 11mo agohttps://archive.ph/gb4Kj https://archive.ph/gb4Kj
- wumms 11mo ago> In 1975, Kodak powered up the country’s first californium neutron flux multiplier (CFX) ... to provide Kodak R&D with an ample stream of neutrons for materials analysis. > If an X-ray shows you the crack in a pipe, neutrons will show you the leak.
- rzzzt 11mo agoI'm getting "Windows Subsystem for Linux" vibes from the project name. Shouldn't this be called a HEUFX with a Californium source?
- richardatlarge 11mo agoQuote: "and though it takes roughly 100 pounds of it to build an atomic bomb...” Are they stupid at PM or just selling misinformation?
- dmurray 11mo agoThis matches other sources on the internet: a bomb requires about 15kg of U-235 [0] with a good use of neutron reflectors, and HEU by definition contains 20%+ of U-235 [1]. We don't know exactly what the U-235 concentration was in the Kodak device, but reasonable values would make the claim "roughly" correct. [0] https://www.britannica.com/technology/nuclear-weapon/Principles-of-atomic-fission-weapons https://www.britannica.com/technology/nuclear-weapon/Princip... [1] https://en.wikipedia.org/wiki/Enriched_uranium https://en.wikipedia.org/wiki/Enriched_uranium
- _n_b_ 11mo agoTheir SNM license was for “up to 93.5% enriched”[1] and their decommissioning plan describes them as MTR-type Al-clad plates. So I’d take a reasonable guess that these are at 93% nominal enrichment, like ATR and HFIR fuel plates. [1] https://www.nrc.gov/docs/ML0900/ML090080661.pdf https://www.nrc.gov/docs/ML0900/ML090080661.pdf [2] https://www.nrc.gov/docs/ml0816/ML081690374.pdf https://www.nrc.gov/docs/ml0816/ML081690374.pdf
- cryptonector 11mo agoHEU != 20% enriched -- 20% is more like the floor for considering it HEU. You need much more than 20% to make an efficient Uranium bomb.
- jeffrallen 11mo agoAt least it wasn't "though it takes at least the equivalent of 12.5 bald eagles of it to build an atomic bomb"
- ahoka 11mo agoThe whole article is a journalistic nothingburger.
- deleted 11mo ago[deleted]
- wkat4242 11mo agoIt wasn't a secret like the article admits later on.
- Yokolos 11mo agoSeems like a distinction without a difference to me? > And aside from a license renewal snafu in 1980, the device made no waves until its existence was shared with the local newspaper—it wasn’t a secret, just unpublicized.
- quinndexter 11mo agoI think "secret nuclear device" and "license renewal" are kind of conceptually incongruous, even if only at a surface level.
- Yokolos 11mo agoThe license renewal has nothing to do with anything. It's not related to the incident where its existence was revealed. This is about "secret" vs "unpublicized", not "secret" vs "license renewal".
- IshKebab 11mo agoIn this context "secret" implies they didn't tell the government. Merely not publicising an internal project is totally normal and doesn't warrant "secret project!!"
- alpinisme 11mo agoI guess that depends on how hysterically you read the word secret (including projecting hysterics on others using it). But we at work have a lot of secret projects. Basically everything is given a project code name until it’s public and if you work in R&D you are told not to discuss your work on such projects either outside the company with friends or inside the company with people who don’t work in R&D. That is the closest to the definition of secret I can imagine. And it sounds like this nuclear lab was in a similar category. If someone freaks out about it, it’s because they think you’re abusing normal, run of the mill product development secrecy, whether to develop a product that shouldn’t exist or to hide a practice that is never intended to be public and is just called secret to avoid scrutiny from an interested public (who, in this hypothetical scenario, feel that they have a right to be interested — think research into dangerous pathogens next to an unprotected public aquifer).
- imglorp 11mo agoWhat a neat device. Unlike those extra spicy, dangerous sources that say "drop and run" on them, this thing only runs when you line up the CF-252 with the HEU plates. It has an off switch to stop the cascade. Perfect for lab use.
- rdtsc 11mo agoCf-252 is no joke though. It has to be carefully handled. It constantly emits neutrons. And those need shielding, something with lots of light atoms like hydrogen - water, PET or other plastics etc.
- randallsquared 11mo ago> Indeed, it’s difficult to imagine trusting private corporations with the stuff atomic bombs are made of today. Valar Atomics would like a word.
- jandrewrogers 11mo agoWhen I studied chemistry at university, only a handful of select students were introduced to the nuclear science lab in the basement. It had a lot of spicy isotopes, neutron sources, etc. Even as a chemistry student with free run of the place for years I had no idea it was in the building until the department head pulled a few of us aside. The reason for the informal secrecy, as it was explained to me, is that every so often someone would find out there was plutonium etc in the basement and have a public freak out, including on occasion other (non-STEM) professors at the same university. These people would try to organize crusades to get it shut down because evil. Intentionally obscuring its existence greatly mitigated this drama. They appreciated us continuing the tradition of keeping it out of sight and out of mind from the general public. The publicity around this Kodak case was an example of why no one talks about nuclear labs. The public cannot be trusted to engage in a discussion about anything “nuclear” in good faith. There are quite a few areas of science like this.
- orioni 11mo agoThis is just like how universities hide their animal research facilities. It wasn't until the final year of my biology degree that I found out we had a basement floor under our life sciences building where this research is carried out. I visited a few times as part of a research project I was involved in, and that experience was one of the factors that put me off pursuing a career in biomedical research.
- hammock 11mo agoIf we can’t have a good faith discussion then maybe it is a good idea to hide nuclear and animal labs. But with less oversight, that also invites abuse. You can probably imagine abuse on your own in an anima lab, but I would also point out after Obama banned gain of function research in 2014 U.S. scientists moved their lab to China where it continued without the same oversight, and bad things happened.
- tsunamifury 11mo agoAs a dyed in the wool leftist I more and more struggle with Obama legacy from common core to regulation to his utter selling out the American people to the cia. When he was well intentioned he seemed to be a total failure and when he was blatantly self interested he was monstrous. I don’t think the right is another option but woof… this is tough
- dtgriscom 11mo agoOK, HN physicists: how did this work? My first guess was that the beam of Cf252-emitted neutrons, when it hits the U235, triggers new neutrons moving in the same direction, rather than in random directions. This would ensure that any tertiary neutrons would join the crowd and help the amplification while not just heating the system up. Or, maybe that's the point? It's a not-quite-critical collection of U235 that is pushed even closer to criticality by the Cf252, multiplying the Cf232's neutron flux by "up to 30 times". But, if the U235 neutrons trigger the same emissions as the Cf252 neutrons, then wouldn't that require a razor's edge of criticality? https://en.wikipedia.org/wiki/Californium_neutron_flux_multiplier https://en.wikipedia.org/wiki/Californium_neutron_flux_multi...
- rdtsc 11mo agoIt works just like a nuclear reactor. Neutron hit U atoms, those split and emit more neutrons in a cascade. The configuration is set up to not be self sustaining. It’s a matter of geometry, enrichment level and such. Therefore it needs a source of neutrons. Cf-252 is such source. It fires neutrons constantly but has a relatively short half life (you have to replenish it yearly or so).
- MalbertKerman 11mo ago> then wouldn't that require a razor's edge of criticality? Yup. From the device description in its decommissioning plan: The CFX was a sub-critical assembly of uranium-2-35 surrounding a Cf-252 source. The function of the U-235 fuel was to multiply the neutrons coming from the Cf-252 source, which fissions spontaneously. The CFX was designed never to exceed a Keff of 0.99. The CFX assembly yielded sufficient neutron fluxes for applications such as neutron activation analysis. Keff is the fission neutron multiplication ratio; 1 is criticality.
- mauvehaus 11mo agoAs a reminder: MIT has a research reactor smack-dab in the middle of Cambridge. It's like a block or two off of Mass Ave near Central. They give tours, and if you're in the area, it's highly recommended. A great Boston-area date for the right kind of person. https://nrl.mit.edu/reactor/ https://nrl.mit.edu/reactor/
- TomMasz 11mo agoKodak did a lot of government work over the years. When the news came out, no one panicked. Kodak was the biggest employer in the region and had a lot of local goodwill, we trusted them to take care of things. Needless to say, that is no longer the case.
- ceejayoz 11mo agoKodak also accidentally detected nuclear fallout. https://www.orau.org/health-physics-museum/collection/nuclear-weapons/trinity/kodak-film.html https://www.orau.org/health-physics-museum/collection/nuclea...
- omnicognate 11mo agoThe Royal Naval College in Greenwich, London contained a secret, operational nuclear reactor from 1962 to 1996. Decommissioning it must have posed some interesting challenges, given it was inside a 300 year old building designed by Christopher Wren that is part of a UNESCO World Heritage Site. https://en.wikipedia.org/wiki/JASON_reactor https://en.wikipedia.org/wiki/JASON_reactor
- shevy-java 11mo agoYou don't want to know what I keep in my basement ... (... but it really isn't so interesting, so in order to keep the mystery, I'll simply not say what it is!) > In 1975, Kodak powered up the country’s first californium neutron flux multiplier (CFX). Though it couldn’t live up to the sci-fi-tinged promise of its name Why? It vanished! Nobody knows why or how.
- anjel 11mo agoAt the Univ of Maryland College Park in the mid 1980s, a campus of 40k students, it was common knowledge the was a small research reactor in full time operation right on campus. I can't imagine it was the only school to have one.
- sudosteph 11mo agoWe also have one at NC State, still there AFAIK. I thought it made sense though given our nuclear engineering program. I looked it up and apparently we've had 3 or 4 different reactors on campus over the years, first one in 1950: https://nrp.ne.ncsu.edu/about/history/ https://nrp.ne.ncsu.edu/about/history/ I'd wager that even most NC State students don't know that it's there though.
- justin66 11mo agoMy school for undergrad had, and still has, a "Nuclear Reactor Laboratory." I'm pretty sure everyone who cared understood what was going on there. The university got in trouble in the mid nineties for having buried nuclear waste as well as medical waste (cadavers) on a remote part of campus, but apparently that's not enough to put a Nuclear Reactor Laboratory out of business. Or a large university's medical system, of course.
- lsaferite 11mo agohttps://neup.inl.gov/infrastructure/university-research-reactors/ https://neup.inl.gov/infrastructure/university-research-reac...
- huydotnet 11mo agoDisappointing, for a second I thought I have found a solution to power my 8x5090 homelab.
- parsimo2010 11mo agoThe article is paywalled, but remember that the USA’s business giants during the Cold War were ran quite different than businesses today, especially with the fact that they had major internal R&D labs that did novel research in-house and relied less on transfer coming from research universities. Think about the other stories that you may have heard about Xerox or Bell labs. So Kodak having research abilities is not surprising. They also made the cameras and films for US spy satellites during the Cold War. They were not just a little company that made recreational film. They were a science and chemistry powerhouse.
- ccapo 11mo agoThe University of Toronto (among others in Canada) had SLOWPOKE reactors on campus. https://en.wikipedia.org/wiki/SLOWPOKE_reactor https://en.wikipedia.org/wiki/SLOWPOKE_reactor
- owenversteeg 11mo agoI see a lot of people claiming this sort of thing was “common” (JASON at the Royal Naval College London, MIT’s MITR-II, CROCUS at EPL) but there is a huge difference between these things. Kodak’s CFX was a small device the size of a refrigerator; it is a neutron source and not a reactor. CROCUS is a reactor, but also small (100W thermal) and JASON, while larger, is also low power (10 kW.) MITR-II on the other hand is nearly one thousand times larger at 6 MW thermal. There are only three civilian reactors >1MW in the US: at MIT, UC Davis, and the University of Missouri. You could also count the RINSC MTR, which is owned and operated by the Rhode Island state Atomic Energy Commission but located on the University of Rhode Island campus and collaborates closely with the university. Similarly, there are only two >1MW in Western Europe (TU Delft and TU München.) If this sort of thing interests you, I can recommend reading about the history of the TRIGA. Freeman Dyson and Edward Teller designed it as a reactor “safe even in the hands of a young graduate student” and the US government sent them around the world as part of Atoms for Peace.
- chc4 11mo agoUMass Lowell has a 1MW research reactor as well.
- b0rbb 11mo agoI worked at the main Kodak tower in Rochester for a few years in the early 2000s. Mainly as a paid IT intern of sorts to earn some additional money in college. I often had to go to the basement there to store equipment, get equipment, etc. The stuff I'd see down there was WILD. TONS of old movie/film paraphernalia in the form of posters, plaques with celluloid celebrating various movie releases, and tons of unmarked old film canisters. There was also a TON of old tech down there. I used to joke that I felt like I was in that Hanger 51 warehouse from the end of Indiana Jones and The Ark of the Covenant. It's a shame things went down as they did for Kodak. I really enjoyed those years I worked there. They used to make killer tuna melt paninis in their cafeteria area near the top of the tower and in the summer months I'd keep my car parked at work and just walk across the street to see the Rochester Red Wings play (AAA minor league baseball team).
- nickdothutton 11mo agoWhen I was at university a lifetime ago, the country had a number of university research reactors. Some of their work could be.. and was.. replaced by computer simulations, but not all. Today there are zero. My impression is that not only is the UK public ignorant and fearful of nuclear, but of "labs" in general. Their view is informed largely by newspaper headlines and Hollywood movies.
- lsaferite 11mo agoThe University of Florida (Gainesville, FL), has a small nuclear reactor on campus. My mom always talked about it when I was young as she worked in the nuclear engineering department. I just checked and it's still active. Apparently it's been online since 1959. https://news.ufl.edu/2025/10/uf-students-join-elite-ranks/ https://news.ufl.edu/2025/10/uf-students-join-elite-ranks/ https://neup.inl.gov/infrastructure/university-research-reactors/ https://neup.inl.gov/infrastructure/university-research-reac...