대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제39권5호
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  • Pages.282-287
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  • 2017
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
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방사성 동위원소를 이용한 제염제 혼합확산장치의 유동특성분석

Flow Characteristics Analysis of the Decontamination Device with Mixing and Diffusion Using Radio-Isotopes Tracer

  • Oh, Daemin (Korea Institute of Civil engineering and building Technology) ;
  • Kang, Sungwon (Korea Institute of Civil engineering and building Technology) ;
  • Kim, Youngsug (Korea Institute of Civil engineering and building Technology) ;
  • Jung, Sunghee (Korea Atomic Energy Research Institute) ;
  • Moon, Jinho (Korea Atomic Energy Research Institute) ;
  • Park, Jangguen (Korea Atomic Energy Research Institute)
  • 투고 : 2017.03.06
  • 심사 : 2017.04.12
  • 발행 : 2017.05.31
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초록

본 연구의 목적은 방사능 사고로 인한 오염물질 유입으로 인한 영향을 최소화하기 위한 제염제의 혼합확산장치 개발에 앞서 장치 가동으로 인한 혼합 및 확산영향을 예측하는데 있다. 유동특성분석을 위해 사용된 추적자는 방사성 동위원소는 Gy, To이며, 이를 검측하기 위해 2인치 NaI 방사선 검출기를 사용했다. 본 연구에 적용된 제염제 혼합확산장치의 임펠러는 3가지 type으로 제작하였다. 방사혼합형 임펠러는 상향류 흐름을 이용하여 수표면으로 확산이 가능하며, 최적의 조건을 찾기 위해 핀 구조를 조정하였다. 방사능 동위원소를 이용한 제염제 혼합확산장치의 유동특성을 분석한 결과, 모델별 혼합확산과 유동패턴특성을 획득하였다. Model 3 type은 별도의 Fin유도부와 보조 Fin이 구성되어 있어 다른 type의 임펠러보다 확산속도가 크고 완전혼합에 도달하는 시간이 짧게 나타났다.

The purpose of this study was predicted the effects of mixing and diffusion due to the operation of the apparatus before the development of the mixed diffusion device for the decontamination absorbent to minimize the influence of contaminant inflow due to radiation accident. The tracer used for the flow characteristics was $^{68}Ga$, $^{99m}Tc$, which is a radioactive isotope, and 2 inch NaI radiation detector was used to detect it. The impeller of the decontamination mixed diffusion system applied to this study was made into three types and the mixing diffusion effect was compared. As a result of analyzing the flow characteristics of the radio-isotope with decontamination mixed diffusion device, mixing, diffusion and flow pattern were obtained. The radial mixing type impeller was able to diffuse to the water surface by the upflow flow, and the fin structure was adjusted for finding optimal conditions. The model 3 type consists of a fin guiding part and an auxiliary fin so that the diffusion speed is higher than that of other types of impellers. It also showed a short time to reach complete mixing.

키워드

참고문헌

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피인용 문헌

  1. A Study on the Operational Parameters of Pilot Scale Diffusion Mixer using Multi-phase Flow Analysis vol.40, pp.8, 2018, https://doi.org/10.4491/KSEE.2018.40.8.320