• Korean Security Journal
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• no.58
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• pp.155-176
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• 2019

The purpose of this study is to evaluate and analyze domestic private security activities through experiences of Chinese people who have been thought to be very necessary for the development of domestic private security and to suggest measures for the customization of foreigners and Chinese people for Korean private security companies. The purpose of this study was to analyze the psychological satisfaction of Korean civilian security activities through the experiences of Chinese Koreans who are using Korean civilian security services and to discuss ways to improve domestic civil security activities not only for Chinese Koreans but also for Koreans visiting Korea. And conducted in-depth interviews with limited data and insufficient prior research. First, we should not judge the scale of Chinese visit today as a separate industry that is not related to our private security. Second, it should be carried out confidently with a prepared marketing attitude that makes the choice of the security guard excellent. Third, a company management is necessary. Fourth, communication should be done. Fifth, it should become a loyal 'butle'.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.18 no.2
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• pp.179-194
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• 2020

A Bayesian approach was introduced to improve the belief of prior distributions of input parameters for the probabilistic safety assessment of radioactive waste repository. A GoldSim-based module was developed using the Markov chain Monte Carlo algorithm and implemented through GSTSPA (GoldSim Total System Performance Assessment), a GoldSim template for generic/site-specific safety assessment of the radioactive repository system. In this study, sequential Bayesian updating of prior distributions was comprehensively explained and used as a basis to conduct a reliable safety assessment of the repository. The prior distribution to three sequential posterior distributions for several selected parameters associated with nuclide transport in the fractured rock medium was updated with assumed likelihood functions. The process was demonstrated through a probabilistic safety assessment of the conceptual repository for illustrative purposes. Through this study, it was shown that insufficient observed data could enhance the belief of prior distributions for input parameter values commonly available, which are usually uncertain. This is particularly applicable for nuclide behavior in and around the repository system, which typically exhibited a long time span and wide modeling domain.