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Ri Hong-sop (born 1940) is a North Korean scientist.[1]

Ri is a former director of the Yongbyon Nuclear Scientific Research Center.[2][3] In 2005 he served on the program committee of the International Atomic Energy Agency's Nuclear Energy and Security (NUSEC) conference in Salzburg, Austria.[4] According to the United Nations, Ri has played a "key role in the ... [DPRK's] nuclear program”.[5]

In January 2016 Ri, along with a fellow associate in the nuclear weapons program Hong Sung-mu, was the first in line to receive a medal from Kim Jong-un for success in the January 2016 nuclear test.[5] The two men are collectively known as North Korea's "nuclear duo".[6]


  1. ^ "RI HONG-SOP". United Nations Security Council. Retrieved September 4, 2017.
  2. ^ Jeffries, Ian (2012). North Korea, 2009-2012: A Guide to Economic and Political Developments. Routledge. p. 109. ISBN 1135116989.
  3. ^ Chaim Braun; Siegfried Hecker; Chris Lawrence; Panos Papadiamantis (27 May 2016). North Korean Nuclear Facilities After the Agreed Framework (PDF). Center for International Security and Cooperation (Report). Stanford University. Retrieved 14 March 2019.
  4. ^ ENERSEC Conference Series Nuclear Energy and Security (NUSEC) Book of Abstracts (PDF). IAEA. 2005. p. ix.
  5. ^ a b "North Korea's nuclear scientists take center stage with H-bomb test". Reuters. September 4, 2017. Retrieved September 4, 2017.
  6. ^ Choe Sang-hun; Rich, Motoko; Renau, Natalie; Carlesen, Audrey (15 December 2017). "Rocket Men: The Team Building North Korea's Nuclear Missile". The New York Times. Retrieved 12 February 2019.