외부비용은 재화나 서비스가 생산 또는 소비되는 과정에서 제3자에게 부과되는 비용이다. 원자력 발전을 통한 전력생산에 도 외부비용이 발생하며 이들에 대한 연구가 1990년대부터 진행되어 왔다. 비용은 정책결정에 중요한 요소로 전력 생산에 대한 비용 비교를 위해 외부비용이 고려되고 있다. 핵연료주기에서도 선택에 따라 다른 외부비용이 발생되지만 이에 대한 연구는 진행되고 있지 않다. 본 연구에서는 핵연료주기 외부비용 평가 방법 개발을 위해 원자력 발전에 대한 외부비용 평가 방법을 조사하고 분석하였다. 후쿠시마 사고 이전에는 외부비용 연구들은 정상 운전 상태에서의 손상 비용에 초점을 두었 다. 그러나 사고 이후 사고비용이 주요 주제가 되었다. 사고비용을 포함한 외부비용 범위는 여러 연구들에서 다양하게 사용 되었으며 범위에 맞춰 다른 방법들이 적용되었다. 본 연구에서는 이러한 결과들이 비교되었으며 핵연료주기에 따른 외부비 용 추산에 방법적 적용성 판단을 위해 분석되었다.

과학기술 수용자는 과학기술 변화과정을 결정하는 중요한 이해관계자이다. 하지 만 이들이 과학기술이슈에 대해 어떤 생각을 가지고 있는지 확인하는 기존의 방법들은 많은 노력과 시간이 필요한 것으로 알려져 왔다. 본 연구에서는 빅데이터 분석에 널리 사용되는 토 픽모델링을 활용해 온라인 토론장에 게시된 글을 분석하여 한국인의 원자력발전에 대한 인식 을 알아보고자 한다. 이것은 거시이슈들이 일반 과학기술 수용자 인식구조에 어떤 영향을 미 치며, 변화된 인식구조의 지속성을 이해하는데 도움을 줄 수 있다. 빅데이터를 이용해 실시간 으로 특정 과학기술이슈에 대한 일반인의 인식을 파악한다면, 과학기술 수용자(일반인)와 공 급자(전문가) 집단 사이의 인식간극을 줄이는데 도움을 줄 수 있을 것으로 기대한다.

The tsunami hazard analysis is performed for testing the application of probabilistic tsunami hazard analysis to nuclear power plant sites in the Korean Peninsula. Tsunami hazard analysis is based on the seismic hazard analysis. Probabilistic method is adopted for considering the uncertainties caused by insufficient information of tsunamigenic fault sources. Logic tree approach is used. Uljin nuclear power plant (NPP) site is selected for this study. The tsunamigenic fault sources in the western part of Japan (East Sea) are used for this study because those are well known fault sources in the East Sea and had several records of tsunami hazards. We have performed numerical simulations of tsunami propagation for those fault sources in the previous study. Therefore we use the wave parameters obtained from the previous study. We follow the method of probabilistic tsunami hazard analysis (PTHA) suggested by the atomic energy society of Japan (AESJ). Annual exceedance probabilities for wave height level are calculated for the site by using the information about the recurrence interval, the magnitude range, the wave parameters, the truncation of lognormal distribution of wave height, and the deviation based on the difference between simulation and record. Effects of each parameters on tsunami hazard are tested by the sensitivity analysis, which shows that the recurrence interval and the deviation dominantly affects the annual exceedance probability and the wave heigh level, respectively.

Many countries have introduced new imported food safety measures, following the accident at Fukushima Daiichi Nuclear Power Station. This study was conducted to evaluate the measures contents and effects on food trades values. Eight percent of members were notified the introduced measures to the World Trade Organization. The measures’ contents were banning imports, enhancing inspection and adding certification requirement. The covered regions were some prefectures, entire Japan or all affected countries. European Union introduced a measure that subjecting foods originating from 12 prefectures to import at designated ports with required certification. The measures were amended 8 times until March 2014 to apply listed foods from 15 prefectures. The trade value of fishery products and miscellaneous foods were affected. Australia introduced a measure that required additional inspection of dairy, fishery and plants products from 13 prefectures with subsequent amendments. The trade value had no effect in tested foods. Chinese Taipei introduced a temporary import ban for all foods from 6 prefectures. Trade values for fruits were affected. The United States issued an import alert for detention without examination for listed prefectures and goods without introducing new measures. Although no specific products were affected, trade values for all foods were affected.

This study presents a structural safety analysis method for a plant annunciator panel under the seismic effect. Seismic qualification analysis for the nuclear plant annunciator panel is carried out to confirm the structural integrity and the results are represented by required response spectra. For the numerical analysis, finite element method is adopted. Mode combinations are also used to obtain the reliability of the spectrum analysis. The analysis results shows that the nuclear plant annunciator panel is designed as a dynamically rigid assembly, without any resonance frequency blow 33Hz. The calculated stress of the nuclear plant annunciator panel is much less than yield stress of used steel.