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The difference between a uranium nuclear weapon and a plutonium one

Uranium or plutonium?  , The Korea Times, By Andrei Lankov”….. It makes a big difference whether they test a plutonium device, as they have done twice before, or if this time we will see the first test of a uranium one. There is a major difference between the two.

Plutonium occurs naturally only in tiny quantities and hence has to be produced artificially in a nuclear reactor where it is a normal byproduct of nuclear fission. However, a nuclear reactor is a large machine which cannot possibly be hidden by the prying eyes of satellites.

If the outside world knows the technical details of the reactor, it is possible to guess its total plutonium output, from when the reactor became operational. Analysts believe that North Korea’s nuclear reactors have produced between 30 and 50 kilograms of weapons-grade plutonium (enough for five to 10 nuclear bombs).

 Uranium is different. Highly-enriched uranium (HEU), which is used in nuclear weapons, is produced by enriching uranium ore. There are different technologies but most of the time a cascade of centrifuges is used, with each centrifuge in the cascade producing a more concentrated product.
Unlike unwieldy reactors, such cascades are relatively easy to hide from satellites and reconnaissance planes. There is no way to be sure that all the centrifuge cascades have been located. Therefore it is difficult to estimate the size of stockpiles of HEU in a given country, and this means that HEU is remarkably more dangerous when it comes to proliferation…..  http://www.koreatimes.co.kr/www/news/nation/2012/05/304_110408.html

May 7, 2012 - Posted by | Reference, Uranium, weapons and war

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