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월성원자력발전소의 항내 오염물 유출 특성에 관한 수리실험

Hydraulic Experiment for Pollutant Discharge Characteristics in a Wolseong Nuclear Power Plant Port

  • 투고 : 2015.10.26
  • 심사 : 2015.12.28
  • 발행 : 2016.06.30

초록

본 연구에서는 항 내부에서 부하되는 오염물질이 파랑 및 흐름 조건으로 인하여 항외로 유출되는 과정을 수리실험을 통해 알아보았다. 월성원자력발전소 항내에 오염물질이 부하 되었을 시, 실험인자를 변화시켜가며 추적자를 활용한 흐름거동 조사를 수행하였다. 각 실험의 결과는 지수 함수에 따른 항내 오염물이 감소하는 경향이 나타나며, 항외 유출에 걸리는 시간의 기울기는 각각 다른 결과를 보여주었다. 관측된 데이터로부터 회귀식을 도출한 결과, 흐름 관측의 경우 유입되는 모터의 회전 속도 30, 20, 10 rpm에서 좌측 항내의 오염물이 50% 유출률에 도달하는 시간은 각각 2.70, 10.40, 26.39 days를 보였다. 모터의 회전속도가 30 rpm인 실험에서 유출되는 감소 추세가 가장 뚜렷하게 나타났으며, 회전속도 10 rpm인 실험에서 기울기는 완만하였다. 파랑 관측의 우측 영역의 오염물이 50% 유출률에 도달하는 시간은 4.59 days로 나타났으며, 좌측영역의 경우 15.35 days의 결과를 보였다.

In this study, the dispersion process of pollutant substances in a port under wave and current environments was evaluated by a hydraulic experiment. Once the contaminants washed ashore into the port of Wolseong nuclear power plant, transport processes of pollutants were investigated by tracking the tracer according to the variations of experimental condition through a hydraulic experiment. Several hydraulic experiments were performed to analyze the pollutant discharge rate of the surface coming from the different coastal environments. From the hydraulic experiment results, the tracer concentration decreased exponentially. These results suggested that, after the tracer was transported to the open sea, a different gradient was shown under different conditions. For the case of a diluted condition, the half-life of flow rate was 2.70, 10.40, and 26.39 days for 30, 20 and 10 rpm in the left-side, respectively. The decrease of the tracer concentration under conditions of 30 rpm was much faster than that under conditions of 10 rpm. For the wave condition, the half-life of flow rate was 4.59 and 15.35 days for the right and left side of the port in a hydraulic scale prototype, respectively.

키워드

참고문헌

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