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Samurai-Sword Maker May Cool Nuclear Revival
NobleSavage sends a story from Bloomberg about Japan Steel Works Ltd., a company that still makes Samurai swords, and how it may control the fate of the global nuclear-energy renaissance. "There stands the only plant in the world, a survivor of Allied bombing in World War II, capable of producing the central part of a nuclear reactor's containment vessel in a single piece, reducing the risk of a radiation leak. Utilities that won't need the equipment for years are making $100 million down payments now on components Japan Steel makes from 600-ton ingots. Each year the Tokyo-based company can turn out just four of the steel forgings that contain the radioactivity in a nuclear reactor. Even after it doubles capacity in the next two years, there won't be enough production to meet building plans."
This sounds like an area where American metal working could enjoy some sort of renaissance. I wonder what the start-up costs for such an endeavor are, what the future growth and profit margins are, and where such competency could be applied outside of reactors and and swords. But, with low skill metal working being outsourced, such specialized skills might be a place for America to specialize, especially as the dollar continues to fall.
http://bgcommonsense.blogspot.com
As I understand it CANDU reactors don't even use a pressure vessel as such, but instead uses an assembly of pressurized tubes. One for each fuel bundle. This design was chosen precisely because it eliminated the need for this type of technological bottleneck and it is still in use today. I think tfa neglects to mention that there are several reactor designs that aren't dependent on this particular company.
Please don't use "umm" or "err" or "erm".
I am puzzled. In last thirty years, our country in the heart of Europe has independently manufactured about twenty five complete reactor units. And we're not exactly the pinnacle of the world's engineering, even though compared to our neighbours, we might be pretty good. I would expect USA and other western countries having much more resources than us to be more independent in this respect. Now it may be that the qualiry criteria have been tightened up a little, but still, USA, for example, is a huge country. Don't tell me that a country capable of delivering people to Moon and space probes to the outer Solar system can't manufacture even a single bloody reactor vessel.
Ezekiel 23:20
I work reasonably closely with manufacturers of all sorts of marine equipment. Lifeboat davits, cranes, winches, diesel engines, etc. The most common thing they do when they can't source a part is change the design. This encourages innovation, and usually the new design is safer than the old one anyway. If you're waiting on a part for 2+ years for a crane, are you going to wait and see if someone else starts manufacturing them? No. You're going to change that design (maybe 6 months, probably less) and build it.
Nuclear engineering may be a lot different since everyone wants to stick with what has worked in the past, but can't getting the parts to build something usually results in a new design in my experience.
Even those who arrange and design shrubberies are under considerable economic stress at this period in history.
The "practically worthless" swords, from a Japanese perspective, would be anything NOT made in Japan. Most of the cheap wallhangers that you see out there in the marketplace are from China, believe it or not.
+that's funny...I don't FEEL tardy.+
If it takes three weeks to forge one vessel, why can they only produce four vessels per year?
Also, the forging is described as a cylinder, which leaves the top and bottom of the pressure vessel. How do you weld 30 cm thick steel? ISTR reading about submarine construction (which use a pressure hull maybe a few cm thick) where welding the hull sections had to take place at night because daytime operations would overload the local power grid. These vessels would be even more difficult to weld correctly.
, they are relatively "clean", and employ lots of white collar/upper middle class workers. Most communities were glad to have them built nearby. Especially, when they were helping "beat those commies to the moon".
A heavy steel forging operation, OTOH, would face opposition because of the smokestack emissions, and the ingrained idea that we don't need workers who actually MAKE anything anymore, when we can base our entire economy on shuffling money around and suing each other.
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this is ha-ha-only-serious in a way; the godzilla movies serve as a kind of metric for japanese societal attitudes towards nuclear power. immediately post-war, gojira is a monster created by radiation that comes and terrorizes tokyo but within 20 years or so, he's japan's protector from outside alien monsters (mothra, gamera, etc) and is japan's big scaly mascot (with annoying "go-get-'em-pop!" godzilla-baby, godzuki.)
FreeBSD for the impatient.
It is cheaper for now. China's got problems, possibly big problems. They got huge pollution problems, and they've got run away inflation, plus the standard of living is rising in the cities. Effectively the cost advantage of "Made in China" is rapidly eroding. Some of the cheap manufacturers are now looking to relocate to different Asian countries where the labour costs are now lower than China.
Fanatically anti-fanatical
If you really need a heavy sword, use a little Tungsten filler. It's 19.25 g/cc, has a high tensile strength, and makes steel stronger as an alloy. It lost out to DU because it typically has to be imported from China (and the US wanted to use the DU, not store it indefinately). DU is also pyrophoric.
They have tours of Japan Steel Work's sword factories, following link has some pictures:
http://ameblo.jp/machizukuri-engineer/entry-10070632943.html
An older example of the swords they make (from the Russo-Japanese war):
http://www.e-sword.jp/sale/0650/0650_1006syousai.htm
The company also uses sword-making as a source of research that they apply to other field's of forging
http://ci.nii.ac.jp/naid/110001457129/
Just a note: But you did realize that the natural background radiation in that part of the world is in some places several times over the safe legal limit in all contries that have such a law. If fact one of the hotest places is in nothrern Iraq/ Iran.
Undetectable Steganography? Yep, there's an app fo
If I may pick a nit here, if I understand this right, on average a weld will be stronger than the surrounding metal, the difficulty lies in being certain that that's the case for all of your welds. The problem isn't getting the strength up, but getting the variation down -- and as you point out earlier, non-destructive inspection of welds is a tough problem.
This is the reason that aircraft are still assembled using bolts and rivets -- in theory you could make a lighter aircraft using welds, but there isn't any way to be certain that any particular weld was done right, so we usually stick with a slightly inferior, but more dependable way of doing it.
(Or at least that was the case some years back... it would seem like there must be some way of cracking this problem.)