경수로원전의 격납건물종합누설률시험 주기 연장 인허가에따른 주기적 리스크 재평가

ILRT Intervals for nuclear power plants in Korea were extended from once in five years to once in ten years. Therefore, it is required to evaluate the risk impact for ILRT interval extensions as a condition of ILRT extensions. In this paper, input data were generated for the reference PWR plants using the raw data such as meteorological, population distribution and source term data. And, the web-based Off-Site Consequence Analysis Program(OSCAP) was used to calculate the effects of extensions based on the two methodologies of NUREG-1493 and NEI Interim Report. The web-based OSCAP was designed based on the MACCS(MELCOR Accident Consequence Code System) II, which is generally used as a tool for an off-site consequence analysis. The results of periodic risk assessments following ILRT extension were identified not to be significant. It is considered appropriate to apply this study and results in an accident management plan and safety goal, and to the field of public acceptance