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자료유형
학술저널
저자정보
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한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제49권 제2호
발행연도
2017.1
수록면
411 - 425 (15page)

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Using a probabilistic safety assessment, a risk evaluation framework for an aircraft crashinto an interim spent fuel storage facility is presented. Damage evaluation of a detailedgeneric cask model in a simplified building structure under an aircraft impact is discussedthrough a numerical structural analysis and an analytical fragility assessment. Sequences ofthe impact scenario are shown in a developed event tree, with uncertainties considered inthe impact analysis and failure probabilities calculated. To evaluate the influence of parametersrelevant to design safety, risks are estimated for three specification levels of caskand storage facility structures. The proposed assessment procedure includes the determinationof the loading parameters, reference impact scenario, structural response analyses offacility walls, cask containment, and fuel assemblies, and a radiological consequenceanalysis with doseerisk estimation. The risk results for the proposed scenario in this studyare expected to be small relative to those of design basis accidents for best-estimated conservativevalues. The importance of this framework is seen in its flexibility to evaluate thecapability of the facility to withstand an aircraft impact and in its ability to anticipate potentialrealistic risks; the framework also provides insight into epistemic uncertainty in theavailable data and into the sensitivity of the design parameters for future research.

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