North Korea has completed a major step by placing a dome on a light water reactor that could support its nuclear programme. Allison Puccioni of Jane's Defence Weekly said the Satellite images from 6 August show the dome atop the reactor building at the Yongbyon site. But it may take several more years before the site is fully operational. Pyongyang first revealed that it was building a light water reactor in 2010 when it showed US scientists a uranium enrichment plant reportedly producing fuel for the new facility. It says the reactor is to meet energy needs. But experts said the reactor could be used to produce plutonium and the plant could be converted to produce highly enriched uranium for weapons.