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A Probabilistic Safety Assessment of a Pyro-processed Waste Repository

A-KRS 처분 시스템 확률론적 안전성 평가

  • Received : 2012.08.16
  • Accepted : 2012.10.16
  • Published : 2012.12.30

Abstract

A GoldSim template program for a safety assessment of a hybrid-typed repository system, called A-KRS, in which two kinds of pyro-processed radioactive wastes, low-level metal wastes and ceramic high-level wastes that arise from the pyro-processing of PWR nuclear spent fuels are disposed of, has been developed. This program is ready both for a deterministic and probabilistic total system performance assessment which is able to evaluate nuclide release from the repository and farther transport into the geosphere and biosphere under various normal, disruptive natural and manmade events, and scenarios. The A-KRS has been probabilistically assessed with 9 selected input parameters, each of which has its own statistical distribution for a normal release and transport scenario associated with nuclide release and transport in and around the repository. Probabilistic dose exposure rates to the farming exposure group have been evaluated. A sensitivity of 9 selected parameters to the result has also been investigated to see which parameter is more sensitive and important to the exposure rates.

파이로처리 방사성 폐기물 처분 시스템에 대하여 골드심을 이용하여 개발된 확률론적 평가 프로그램을 이용하여 폐쇄후 방사선적 안전성 평가를 수행하였다. 처분장으로부터 핵종이 유출되어 다양한 처분 시스템 내 매질을 이동하는 것에 관련된 정상 시나리오에 대한 평가를 위하여, 평가 결과에 대한 민감도나 일반적으로 불확실성의 범위가 큰 입력자료 중 주요하다고 판단되는 파라미터를 9개로 선정하여 평가에 고려된 핵종 중 Tc, Sn, Pa, Cs 4개의 원소에 대하여 평가 결과를 논의해 보았다. 확률론적 안전성 평가와 함께 이들 각 입력 자료에 대한 최종 방사선 피폭선량에 대한 민감도도 분석하여 결과에 대한 각 입력 파라미터의 중요도도 비교하였다.

Keywords

References

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Cited by

  1. A methodology for a risk-based approach to complex scenarios in a long-term safety assessment of a radioactive waste repository vol.268, 2014, https://doi.org/10.1016/j.nucengdes.2013.11.086
  2. A Sensitivity Study on Nuclide Release from the Near-field of a Pyroprocessed Waste Repository System: Part 2. A Deterministic Approach vol.12, pp.1, 2014, https://doi.org/10.7733/jnfcwt.2014.12.1.37
  3. A Sensitivity Study on Nuclide Release from the Near-field of the Pyroprocessed Waste Repository System: Part 1. A Probabilistic Approach vol.12, pp.1, 2014, https://doi.org/10.7733/jnfcwt.2014.12.1.19
  4. 폐밀봉선원 처분시스템 예비 폐쇄후 안전성평가 vol.22, pp.4, 2012, https://doi.org/10.7857/jsge.2017.22.4.033