Suchergebnisse

AbstractThis study investigates the Korean Government's Verification of Identity Policy by looking at the discourse surrounding its introduction and using a survey to determine the extent to which the policy was a success. While the Internet allows unprecedented freedom of expression and public opinion gathering, it also facilitates anonymity and facelessness, which increases the possibility of damage caused by deviant online behavior. The Verification of Identity Policy was aimed at fostering a more responsible Internet culture. At the beginning, it faced fierce resistance from civic groups but media coverage of innocent and high‐profile victims has changed public opinion and facilitated the implementation of the policy in 2006. Although arguments about freedom of anonymous expression and relief of damage by restrictions on freedom continue, the Verification of Identity Policy is evaluated here as a partial success, having maintained public support despite the possibility of restrictions on freedom of expression. Nevertheless, this policy perspective recommends that the Korean Government should invest in a broader and long‐term Internet usage plan than the development of just one universal policy.

After the Fukushima Daiichi nuclear power plant accident, the Korean government and nuclear industries performed comprehensive safety inspections on all domestic nuclear power plants against beyond design bases events. As a result, a total of 50 recommendations were defined as safety improvement action items. One of them is installation of a containment filtered venting system (CFVS) or portable backup containment spray system. In this paper, the applicability of CFVS is examined for OPR1000, a 1000 MWe PWR with large dry containment in Korea. Thermohydraulic analysis results show that a filtered discharge flow rate of 15 [kg/s] at 0.9 [MPa] is sufficient to depressurize the containment against representative containment overpressurization scenarios. Radiological release to the environment is reduced to10-3considering the decontamination factor. Also, this cyclic venting strategy reduces noble gas release by 50% for 7 days. The probability of maintaining the containment integrity in level 2 probabilistic safety assessment (PSA) initiating events is improved twofold, from 43% to 87%. So, the CFVS can further improve the containment integrity in severe accident conditions.