해체시 방사화구조물에서의 선량평가를 위한 주요핵종 선정 방법론 연구
A Study on the Selecting Methodology of Major Nuclides for Dose Assessment in Activation Structures at Decommissioning
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The activation corrosion products generated in the primary system, which is the main activationstructure at decommissioning of a nuclear power plant, contain various levels and nuclides. The primary system’smain equipment is mainly contaminated by neutrons, and the pipes through which the coolant passes arecontaminated by CRUD. The contaminating nuclides from radiation vary slightly depending on the nature of thematerials used in the structure and the reactor type. The main activation nuclides presented in the reference literatureinclude 55Fe, 60Co, 59Ni, 94Nb, and 54Mn, and it has been investigated that long-lived nuclides account for most of theradioactivity. In this paper, a step-by-step selection methodology was presented to select the main representativenuclides that affect workers during nuclear power plant decommissioning. Starting with the radionuclides present asthe reference nuclide, 60Co was selected as the representative nuclide through four steps.
Abstract
The activation corrosion products generated in the primary system, which is the main activationstructure at decommissioning of a nuclear power plant, contain various levels and nuclides. The primary system’smain equipment is mainly contaminated by neutrons, and the pipes through which the coolant passes arecontaminated by CRUD. The contaminating nuclides from radiation vary slightly depending on the nature of thematerials used in the structure and the reactor type. The main activation nuclides presented in the reference literatureinclude 55Fe, 60Co, 59Ni, 94Nb, and 54Mn, and it has been investigated that long-lived nuclides account for most of theradioactivity. In this paper, a step-by-step selection methodology was presented to select the main representativenuclides that affect workers during nuclear power plant decommissioning. Starting with the radionuclides present asthe reference nuclide, 60Co was selected as the representative nuclide through four steps.
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