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Radiological Emergency Preparedness Platform "REPS"

  • Outline of System
  • After Fukushima nuclear power plant accident, the emergency preparedness and responses to protect resident for the releases of radioactive materials from the nuclear power plant were a significant issue in nuclear industry.
    To meet the demands, NSE is going to develop the computerized technical supporting systems.
  • Emergency Response System
  • The purpose of the Radiological emergency response system(REPS) is to protect humans and the environment from radiation exposure, averted by providing technical support and advisory services to the national radiological emergency plan for a nuclear facility.
  • Development of the REPS System
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  • Outline of System
  • REPS system is composed of seven evaluation modules. System functions are as follows:
  • PAIS (Plant Accident Information System)
  • CDAST (Core Damage and Source Term Assessment System)
  • MeDAS (Meteorological Data Management System)
  • REDAS (Radiological Emergency Dose Assessment System)
  • ERMAS (Environmental Radiation Monitoring and Assessment System)
  • RILAS (Radiological Intervention Level Assessment System)
  • GIS (Geographic Information System)
  • RIXS (Reporting and Information exchange System)
  • PAIS and CDAST System
  • The PAIS system collects plant safety parameters regarding an accident or incident at all the nuclear power reactors in operation, and monitors the operational status on a accident situation. The PAIS system is utilized for an analysis of the accident situation, prediction of the core damage and in used to estimate the source terms.
  • Collects and analyzes approximately 40 critical safety parameters
  • Classifies the collected safety parameter values into the critical safety functional categories
  • The CDAST estimates the core damages and the source terms released to the environment using the safety parameters collected by the PAIS.
  • Analyzes the causes and current plant status of an accident
  • MeDAS System
  • The MeDAS system collects regional weather forecast and local area measured meteorological data of the plant site.
  • Collect measured data(wind speed, wind direction, temperature, precipitation, etc) of each 4 nuclear power plant site
  • Collects regional grid point weather forecast and local measured weather data of the Korea Meteorological Administration(KMA)
  • Generates three dimensional wind fields and calculate atmospheric dispersion factors of the nuclear power plant site
  • Forecasting weather for 7days
  • REDAS and GIS System
  • REDAS estimates doses to individual of the public from radioactive materials released into the environment to protect the public and the environment. The radiation doses are calculated using 3-D wind fields and source terms. Effective doses and Organ doses are projected and displayed in a graphical form with the geographical information system(GIS) which are used to implement the protective actions. The proper emergency protective actions needed to minimize the dose to the general resident public, such as an indoor sheltering, evacuation and distribution of the iodine prophylaxis are based on the assessment results by the REDAS coupled with employed socio-environmental data.
  • Calculates the distribution of the radionuclide concentration
  • Estimates the external and internal dose to the public
  • Analyzes and estimates the expected dose for regional grid
  • Provides evacuation check points and routes for the resident protective actions
  • ERMAS and RILAS System
  • Radiation and radioactivity in environments are monitored during normal operation and accident situation.
    The ERMAS collects measured environmental radiation data from the stationary, temporary and mobile monitoring sites on real time basis and radioactivity data from sampling system.
  • Collect data from Environmental Radiation Monitoring Stations and posts
  • Estimate doses received and recalculate source-term based on inverse modeling
  • Protective actions during the Fukushima accident are taken by Japanese government to protect public based on recommendations proposed by the International Atomic Energy Agency(IAEA). The IAEA recommended protective measures should be implemented by the Operational Intervention Levels(OIL) derived from generic criterions.
    The RILAS system treats both 9-OILs and 6-OILs proposed by IAEA combined with ERMAS system.
  • Logics to treat 9-OILs and 6-OILs
  • Extract affected area of OILs with GIS system and display on graphically
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  • Responses and Information exchange System(RIXS)
  • The RIXS is a web-based emergency response report and information exchange system that easily and quickly communicates and shares information among the emergency preparedness facilities in the case of an emergency exercise and/or real accident.
  • Reports the emergency responses and actions
  • Exchanges and maintains the emergency responses information and logs
  • Recent Projects
    • Development of the Web-based Radiological Emergency Dose Assessment Program System in Korea NPPs(S-REDAP)
    • Development of the Offline Source Term Evaluation System(Offline-STES) in AtomCARE system by Fukushima Action Plan
    • Maintenance services to AtomCARE system