Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Derivation of preliminary derived concentration guideline levels for surface soil at Kori Unit 1 by RESRAD probabilistic analysis

  • Byon, Jihyang (School of Mechanical Engineering, Pusan National University) ;
  • Park, Sangjune (School of Mechanical Engineering, Pusan National University) ;
  • Ahn, Seokyoung (School of Mechanical Engineering, Pusan National University)
  • Received : 2018.03.16
  • Accepted : 2018.07.30
  • Published : 2018.12.25
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Abstract

Preliminary surface soil Derived Concentration Guideline Levels (DCGLs) were derived conforming to the Multi-Agency Radiation Site Survey and Investigation Manual (MARSSIM) procedure for the site release and reuse of Kori Unit 1 in Korea. Based on the decommissioning experiences of the U.S. nuclear power plants, a suite of residual radionuclides was determined, and uncertainties contributed to the resultant dose by the input parameters were quantified via the sensitivity analysis of parameters. The peak of the mean dose was obtained via the probabilistic analysis of the RESRAD (RESidual RADioactivity)-ONSITE code. Consequently, $DCGL_w$ of Kori Unit 1 in accordance with two scenarios, industrial worker and residential farmer scenario, were derived and the results were compared respectively with other NPPs. It could be used as a basic guideline for establishing regulatory standards for reuse planning, designing the site characterization surveys and implementing final status survey (FSS).

Keywords

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