• 제목/요약/키워드: Nuclear emergency

검색결과 460건 처리시간 0.031초

중대사고를 대비한 원전비상통신시스템 개념설계 (Conceptual Design of Emergency Communication System to Cope with Severe Accident in Nuclear Power Plants)

  • 손광섭
    • 전자공학회논문지
    • /
    • 제51권5호
    • /
    • pp.58-69
    • /
    • 2014

  • 후쿠시마 사고와 같은 중대사고에 대비하기 위하여 극한환경 내에서도 동작하여 원자력 발전소 내부 상태에 관련된 계측신호를 취득하고, 사고복구에 필요한 밸브, 펌프 등과 같은 비상기기를 작동시킬 수 있는 극한환경용 제어기기와 발전소로부터 최소 30km 떨어진 곳에서 발전소 내부 상황을 감시하고, 제어할 수 있는 모바일 원격 제어실 등으로 구성된 비상대응시스템이 필요하다. 본 논문에서는 극한환경용 제어기기와 모바일 원격 제어실과의 연계를 위한 비상대응시스템 개념 설계 및 성능분석에 대하여 논의하였다. 비상통신시스템은 IEEE 802.11 기술표준을 이용한 지상망과 천리안 위성을 이용한 위성망의 이중화 시스템으로 구성되고, 각 시스템에 대하여 통신링크 버짓, Throughput, 지연시간을 분석하였다.

  • https://doi.org/10.5573/ieie.2014.51.5.058 인용 PDF KSCI

Virtual calibration of whole-body counters to consider the size dependency of counting efficiency using Monte Carlo simulations

  • Park, MinSeok;Kim, Han Sung;Yoo, Jaeryong;Kim, Chan Hyeong;Jang, Won Il;Park, Sunhoo
    • Nuclear Engineering and Technology
    • /
    • 제53권12호
    • /
    • pp.4122-4129
    • /
    • 2021

  • The counting efficiencies obtained using anthropomorphic physical phantoms are generally used in whole-body counting measurements to determine the level of internal contamination in the body. Geometrical discrepancies between phantoms and measured individuals affect the counting efficiency, and thus, considering individual physical characteristics is crucial to improve the accuracy of activity estimates. In the present study, the counting efficiencies of whole-body counting measurements were calculated considering individual physical characteristics by employing Monte Carlo simulation for calibration. The NaI(Tl)-based stand-up and HPGe-based bed type commercial whole-body counters were used for calculating the counting efficiencies. The counting efficiencies were obtained from 19 computational phantoms representing various shapes and sizes of the measured individuals. The discrepancies in the counting efficiencies obtained using the computational and physical phantoms range from 2% to 33%, and the results indicate that the counting efficiency depends on the size of the measured individual. Taking into account the body size, the equations for estimating the counting efficiencies were derived from the relationship between the counting efficiencies and the body-build index of the subject. These equations can aid in minimizing the size dependency of the counting efficiency and provide more accurate measurements of internal contamination in whole-body counting measurements.

  • https://doi.org/10.1016/j.net.2021.06.026 인용 PDF KSCI