Official schematics for a
“workable” atomic bomb appeared on Wikileaks last week, purportedly depicting
the “Fat Man” weapon detonated over the Japanese city of Nagasaki.
The schematic, a “crude” British description of the famous “Fat
Man” device developed at Los Alamos laboratories, was part of the declassified-then-retracted
Penney Report, released under the UK Public Records Act. However, the UK retracted the document from
public access in 2002.
Wikileaks claims the medium-quality scan of a 1947 drawing is still a public record. The site notes that
despite having its access conditions changed to the custody of the Ministry of
Supply, nobody from the government has tried to contact anyone already in
possession of the file, known as UK Public Record Office File AVIA 65/1163 “Implosion.”
“It should be observed that Penney's description and
discussion of development are no more revealing than descriptions of the United
States' first implosion bomb that have been publicly available for many years,
and in fact are less precise than other descriptions that are now available,”
reads the analysis, which appears to have been originally
posted at nucelarweaponsarchive.org. The schematic, part of the 1947 Penney
Report compiled by elite British scientist William G. Penney, who served on the
Manhattan Project, is described as “the oldest material in the file” and was
written “before any actual bomb development work had been undertaken in the UK.”
An original text transcription of the Penney Report depicts a Britain deep in the development of its
own nuclear program: a chart in Appendix M classifies bomb development into 11
categories, and it lists only two that Britain could “go straight ahead and
make.” Other categories, including the bomb’s Plutonium core and detonation
fuse, cite everything from inexperience to difficulty in acquiring materials as
bars to progress – all of which seemed to be defeated by 1952, when the UK
successfully carried out its “Operation Hurricane” at midnight, October 3.
“This diagram is not really a secret to foreign intelligence
services,” reads the WikiLeaks analysis, “nobody is going to be surprised by
this design, just by the fact that it’s appeared in public.”
“Open sources have speculated on these matters for a long
time (see Nuclear
Weapons Design article in Wikipedia), and this just confirms that they were
right,” it adds.
It appears that Wikileaks is comfortable posting the plans: “The
real problem about building one of these designs is the rarity … of plutonium
and polonium, as well as the ability to fabricate sophisticated high explosives
to exacting specifications,” it says. “We’re not talking about IEDs here: to
build a nuclear weapon requires a state.”
As worrisome as the phrase "leaked nuclear bomb schematics" sounds, there is little harm in the one posted on Wikileaks. At least, there's nothing in the schematic that isn't discussed in high school physics classes across the world.
But Wikileaks stirs up another question in its most recent leak controversy. Last month Wikileaks unveiled a series of documents implicating the Julius Baer Group of fraud. While the bank was universally blasted for attempting to get these documents removed from Wikileaks, the jury is still out on how the public will accept leaked nuclear secrets.
quote: If they were previously declassified, that makes them essentially public domain, does it not?
quote: No. Especially since they are classified again.
quote: “This diagram is not really a secret to foreign intelligence services,” reads the WikiLeaks analysis
quote: Not to mention that the above schematics are for a plutonium-based design, and therefore useless for uranium-based weapons. Pu-based devices are ridiculously easy to design...the hard part by far is getting the plutonium itself.
quote: Wrong on a few counts. First of all, both plutonium and uranium can both be used with either an implosion or an artillery-type method. The primary reason we never built a gun-type Pu device was because our early Pu stocks were contaminated with Pu-240 which dramatically increases the chances of predetonation (a "fizzle").
quote: Pu-based devices are ridiculously easy to design...the hard part by far is getting the plutonium itself.
quote: You can buy Uranium ore on Amazon.
quote: As worrisome as the phrase "leaked nuclear bomb schematics" sounds, there is little harm in the one posted on WikiLeaks. At least, there's nothing in the schematic that isn't discussed in high school physics classes across the world.