Yongbyon Reactor I

Category: Nuclear

The construction of this natural uranium-graphite power reactor began in 1980 at Yongbyon, 100 km north of Pyongyang. It is based on a 1950 MAGNOX technology (graphite moderator, aluminum-magnesium clad natural uranium fuel , CO2 gas cooling). The reactor was completed in 1984 and it as was activated in February 1987 under Prof. Ha Kyong Won, a Korean physicist educated in US. After many startup problems, it was operating at 20-30 MW by 1990.

N Korea removed about 30 lb. of plutonium from this reactor in 1988 and built two nuclear bombs. From 1989 to 1991, N Korea may have extracted additional 60 lb. of plutonium, enough for five nukes.