Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2014, Vol. 25 ›› Issue (S1): S010301 doi: 10.13538/j.1001-8042/nst.25.S010301


Feasibility study on the DFP adoption of the medical cyclotron decommissioning in Republic of Korea

Rina Woo,1 Minchul Song,2 Daehyung Cho,2 Wantae Kim,2 and Yongmin Kim1   

  1. 1Department of Radiological Science, Catholic University of Daegu, Gyeongsangbuk-do, 712-702, Republic of Korea
    2Korea Institute of nuclear Safety, Daejeon, 305-338, Republic of Korea
  • Contact: Yongmin Kim
  • Supported by:

    the Nuclear Safety Research Program through the Korea Radiation
    Safety Foundation (KORSAFe) and the Nuclear Safety and Security

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Rina Woo, Minchul Song, Daehyung Cho, Wantae Kim, and Yongmin Kim. Feasibility study on the DFP adoption of the medical cyclotron decommissioning in Republic of Korea.Nuclear Science and Techniques, 2014, 25(S1): S010301     doi: 10.13538/j.1001-8042/nst.25.S010301


Since the development of positron emission tomography in 1937, the number of medical cyclotrons used in
producing radioisotopes (RI) has risen sharply. In its operation, the structural materials of a medical cyclotron
and the concrete shielding of its vault are activated by neutrons. In analyzing domestic and international decommissioning
practices, the dismantling characteristics of medical cyclotrons result in a large amount of radioactive
wastes, such as concrete, although their activity level is very low. In the United States, the dismantling plan must
be established by the applicant. The decommissioning funding plan (DFP) is a financial assurance demonstration
based on a site-specific cost estimate of decommissioning the facility. In 10 CFR 30.35, NRC requires
the submission of DFP in the case of the possession and use of unsealed byproduct materials with a half-life
of greater than 120 days and in quantities exceeding 105 times that of the applicable quantities. The dismantling
of the Seoul National University Hospital (SNUH) cyclotron (TR-13) was performed in December 2012.
Some of the risks resulting from this dismantling are related to radioactive wastes, as well as issues concerning
dismantling costs. Hence, we propose introducing the DFP at the authorization stage. DFP will be helpful in
preparing reliable decommissioning plans for safe decommissioning and unexpected early decommissioning in
the future. DFP can also contribute in reducing radioactive waste and in decreasing the decommissioning cost
by preventing excessive establishments. This study provided an overview of the decommissioning aspects of the
SNUH cyclotron and the necessity of adopting the DFP for decommissioning medical cyclotrons.

Key words: Medical cyclotron, Decommissioning, Decommissioning funding plan (DFP)