Training, Research, Isotope, General Atomics Mark II (TRIGA-Mark II) Research Reactor

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Last Updated: August 1, 2011
Other Name: 연구용 원자로 1호기; KRR-1
Location: Gongneung-dong, Nowon-gu, Seoul (the former location of the Korea Atomic Energy Research Institute)
Subordinate To: Korea Atomic Energy Research Institute, Ministry of Science and Technology
Size: 100KW(th) and later upgraded to 250KW(th)
Facility Status: No longer operational, memorial display

The TRIGA-Mark II in Seoul was South Korea's first research reactor, and it was provided by U.S. firms General Atomics and General Dynamics under an agreement signed on 3 December 1958. The total reactor cost was $73,000 of which $35,000 was provided by the United States. Construction for the reactor began in July 1959 and was completed on 5 November 1960. The TRIGA-Mark II reached criticality on 19 March 1962, and began operations on 30 March 1962. The original capacity of 100 KW(th) was upgraded to 250 KW(th) in 1969. General Atomics provided the 20 percent enriched uranium fuel for the reactor, and it was operational for approximately 36,000 hours per year. [1]

In January 1995, the Korea Atomic Energy Research Institute (KAERI) announced its decision to shut down the TRIGA II and III reactors. In addition, KAERI announced plans to completely dismantle TRIGA III while preserving TRIGA II as part of a memorial display. On 30 December 1995, the TRIGA-Mark II was shut down, and in 1997 KAERI began a four-stage project for decommissioning. [2]

[1] 원자력안전백서 [White Paper for Nuclear Safety] (Seoul: Republic of Korea Ministry of Science and Technology, 2002); "전력사업 100년사 [100 Years of Electricity Business History]," Korean Electric Power Corporation, 27 April 2001,; Ha Young-seon, 한반도의 핵무기와 세계질서 [Nuclear Weapons in Korean Peninsula and World] (Seoul: Nanam, 1991).
[2] 원자로 2기 퇴역TRIGA Mark II' 보존 'Mark III' 해체키로 [2 Nuclear Reactors are Retired /Decided to Preserve 'TRIGA Mark II,' and to Dismantle 'Mark III']," Donga Ilbo, 10 January 1995, p. 17,; "Research Reactor Details - TRIGA-Mark II-SEOUL," International Atomic Energy Agency Research Reactor Database (RRDB),; Seo Du-hwan, 연구로 1호 추도문 [Memorial Writing to Korea's First Reactor TRIGA Mark II]," High-Flux Advanced Neutron Application Reactor (HANARO) News Journal, Vol. 3, September 1997,; "Current Status of Decommissioning Projects at KAERI," Korea Atomic Energy Research Institute,

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