This model is in 1/700 scale. It is from the North Korean Set available in this shop.
According to Wikipedia: "The Yongbyon Nuclear Scientific Research Center is North Korea's major nuclear facility, operating its first nuclear reactors. It is located in the county of Nyongbyon in North Pyong'an Province, about 90 km north of Pyongyang. The center produced the fissile material for North Korea's nuclear weapon tests in 2006 and 2009, and since 2009 is developing indigenous light water reactor nuclear power station technology."