From The Washington Post:
TOKYO, April 15 -- Despite its defiant vow to restart a plant that makes plutonium, North Korea's capacity to add to its small nuclear arsenal is limited by aging technology and by machinery that was disabled as part of a disarmament deal.
Using fuel rods now in storage, the North could process enough plutonium for one nuclear weapon within six months, according to expert assessments.
But it would take 6 to 12 months to restart all facilities at the Yongbyon nuclear plant, and its capacity to produce plutonium is limited to about one bomb's worth of material a year, according to a published assessment by Siegfried S. Hecker, a periodic visitor to the plant and a former director of the Los Alamos National Laboratory. Other experts with on-the-ground knowledge said it would probably take much longer for Yongbyon, a Soviet-era facility where maintenance has been neglected, to resume production.
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More News On North Korea
N. Korea orders out nuclear inspectors -- CNN
North Korea Expels IAEA’s Nuclear Inspectors -- Korea Times
Obama seeks balanced reaction to N. Korea -- UPI
China insists North Korea talks still alive -- Reuters
Obama should play China hand on North Korea, analysts say -- Globe And Mail
UN sent N Korea firm 'blacklist' -- BBC
US, Japan submit list of targeted North Korean entities -- Channel News Asia
Obama finds tough going with North Korea, Iran -- Reuters
NKorea releases photos of top body in rare move -- AFP
North Korea's mysterious power broker -- L.A. Times