Mercury and its compounds are globally managed chemicals as risks to the human body and ecosystem. It mainly enters the human body through ingestion of seafood, especially, methylmercury causes serious diseases such as central nervous system (CNS) disorder and renal dysfunction. In this study, total mercury (Hg) and methyl mercury (MeHg) were determined in seafood (16 species, n = 97) commonly consumed in Daejeon, using a gold amalgamation method. The average concentration (Hg/MeHg mean ± S.D. (minimum–maximun) mg/kg) of total Hg and MeHg in the samples was as follows; Fish 0.038 ± 0.058 (0.004 – 0.272) / 0.028 ± 0.047 (N.D. – 0.236), Crustacea 0.023 ± 0.021 (0.003 – 0.078) / 0.016 ± 0.018 (N.D. – 0.055), Mollusks 0.015 ± 0.015 (0.002 – 0.056) / 0.008 ± 0.013 (N.D. – 0.040). The concentration of MeHg in seafood were significantly correlated with total Hg concentration (p<0.001). The species with the highest average concentration of Hg was the Korean rockfish, but there was no sample that exceeded the maximum residual limit. The total %provisional tolerable weekly intake (%PTWI) value of MeHg for all of the samples was 3.76%, compared with the JECFA’s reference value, which indicates that there is almost no health risk from heavy MeHg intake through the consumption of seafood distributed in Daejeon.

The collision problem is one of the design factors that must be carefully considered for the risk of collision occurring during the operation of ships and offshore structures. This paper presents the main results of the ship collision study, and its main goal is to analyze potential crash scenarios that may occur in the FLNG (Floating Liquefied Natural Gas) considering the likelihood and outcome. Consideration being given to vessels visiting the FLNG and surrounding vessels navigating around, such as functionally supported vessels and offloading carriers. The scope includes vessels visiting the FLNG facility such as in-field support vessels and off-loading carriers, as well as third party passing vessels. In this study, based on QRA (quantitative risk assessment), basic research methods and information on collision are provided. Based on the assumptions and methodologies documented in this study, it has been possible to clarify the frequency of collision and the damage category according to the type of visiting ship. Based on these results, the risk assessment results related to the collision have been derived.

본 연구는 음식점을 대상으로 QMRA의 개념을 적용한 HACCP 전산프로그램을 개발하고 이를 음식점내의 HACCP에 준한 위생관리 수단으로 이용, 최종 음식의 미생물 오염 수준을 예측하여 배식되는 음식의 미생물적 안전성을 확보하여 식중독 사고를 미연에 방지할 수 있는 방법을 모색하였다. QMRA-HACCP 전산프로그램의 개발을 위하여 메뉴를 그룹화하고, 위해분석, 중요관리점의 설정, 관리기준 설정, 모니터링 방법의 설정, 수정조치의 확립 및 기록유지시스템의 확립과 같은 HACCP의 기본적인 7원칙에 의거하여 HACCP 플랜을 개발하였다. 본 QMRA-HACCP 전산프로그램은 일일점검 작업 DB, 정기정검 DB, DAQ DB 및 Rule DB 등 데이터베이스 파일을 보유하여 최종 음식의 미생물 오염 수준을 예측할 수 있으며, 데이터베이스 파일은 수정·보완할 수 있다. 또한 MS Excel의 DB 관리 능력과 MS VBA(Visual Basic Application)을 이용한 프로그램으로 Window에서 사용자가 쉽고 편리하게 이용할 수 있도록 고안되었으며, 가시적인 관리가 수월하다. 모델 음식점을 통하여 선정된 9가지 메뉴에 대하여 개발된 QMRAHACCP 전산프로그램을 이용, 최종 제품의 미생물 오염 수준을 추정하였으며, 추정된 결과를 바탕으로 민감도 분석과 시나리오 분석을 통하여 중요관리점 및 CL을 선정하였다. 본 연구를 통하여 제시된 Generic HACCP 모델은 일반적인 음식점에서 사용할 수 있도록 비교적 간단하게 계획되어 있으므로 실제 음식점에서 일어날 수 있는 모든 위해를 통제할 수는 없다. 그러므로 각 음식점의 작업 현실에 맞도록 재구성하여 적용하는 것이 바람직하다고 사료된다. 또한 개발된 QMRA-HACCP 전산 프로그램을 다양한 음식에 적용하여 그 효과를 검증하는 후속 연구 및 표준레시피 데이터 화일의 지속적인 보완이 필요하겠으며, 다른 음식점에서 QMRA-HACCP 전산프로그램을 이용하여 위생관리를 수행하고, 동시에 미생물적 평가를 병행하여 각 결과간의 상관성을 규명하여 개발된 프로그램의 효율성과 정확성을 재확인하는 연구가 실행되어야 할 것이다.

In this study, with the objects of 173 institutions of university and research institutions, investigation was carried out through visit investigation ar d questionnaire investigation. Frequency and severity of occurrences was acquired mainly through universities and research institutions which have reported occurrences of accidents to the Ministry of Education, Science, and Technology. Quantitative danger evaluation was conducted through frequency and strength of occurrences. Case study was carried out by selecting bio science laboratory of university and as the result of this study, degree of danger among the inspection objects of bio science laboratories, laboratory work place was evaluated as the most dangerous with the scores of 155.00 and as the result of average danger level, compression gas cylinder was evaluated as the most dangerous with the scores of 6.4000.

The likelihood of failure for the stress corrosion cracking (SCC) of caustic cracking, which affect to a risk of facilities, was analyzed through the risk based-inspection using API-581 BRD. We found that SCC of the caustic cracking was occurred above 5 % NaOH concentration, and the technical module subfactor (TMSF) was maximized for above 50 % concentration. The heat traced and monitoring were not sensitive to the TMSF with NaOH concentration and temperature. But the steam out was more of less affect minimum value of the TMSF. Also, the inspection number, the inspection effectiveness, and the year since inspection were very sensitive to the TMSF with NaOH concentration and temperature. Therefore, the plan of next inspection will be established with compositively considering those at once.

Likelihood of failure for the external corrosion of carbon and low alloy steels, which affect to a risk of facilities, was analyzed quantitatively through the risk based inspection using API-581 BRD. We found that the technical module subfactor (TMSF) decreased as the inspection number increased and it increased as the Inspection effectiveness and the used year increased. In this condition, the TMSF showed high value for the case of the marine/cooling tower drift area as a corrosion driver, poor quality of coating, no insulation, and low insulation condition.

Likelihood of failure (LOF) for the external corrosion of stainless steel, which affect to a risk of facilities, was analyzed quantitatively through the risk based inspection using API-581 BRD. We found that the technical module subfactor (TMSF) decreased as the inspection number increased and it increased as the inspection effectiveness and the used year increased, and that the TMSF showed high value for the case of the marine/cooling tower drift area as a corrosion driver, In this condition, the LOF for the external corrosion of stainless steel had lower than that for the carbon and low alloy steels

While a number of Korean companies have undergone ceaseless restructuring to survive today's rapidly changing global economy, the brick and mortar industry has been exerting their efforts to enhance the productivity through the development of new products, quality improvement, cost reduction measures. At present, various risk-evaluation measures have been taken in the fields at the discretion of an enterpriser, though, the effective methods enabling quantitative analysis are insufficient. Accordingly, this study is intended to contribute to the synthetic safety manage -ment in the factory fields and to suggest the quantitative -risk-analysis system by introducing such safety-estimation steps as assortment of processes, pre-assessment of risk factors, decision of risks, counter measures against studied risks, establishment of remedies.

The quantitative evaluation method of the safety management cost was suggested to prevent a gas accident as a major industrial accident. In a gas governor station, process risk assessments such as the fault tree analysis(FTA) and the consequence analysis were performed. Based on process risk assessments, potential accident costs were estimated and the cost-benefit analysis(CBA) was performed. From the cost-benefit analysis for five classification items of safety management cost, the order of the cost/benefit ratio was estimated.

본 연구에서는 특정 대상 시설의 위험도 평가기법을 합리화하기 위하여 기존 특정대상시설 안전등급 평가 메뉴얼을 분석하였으며, 점검항목에 대한 위험도 평가지표를 설정하였다. 합리적인 위험도 평가지표 설정을 위하여 최근 9년간의 인적재난 통계자료를 수집하여 분석하였으며, 주요 재난 발생 원인별 현황 분석을 통해 재난 유형별 각 점검분야의 상대적 가중치를 산정하였다. 또한 최근 9년간 주요사고사례 분석을 통해 체크리스트의 각 점검항목별 중요도를 산정하여, 평가지표의 중요도를 설정하였다. 설정된 점검분야별 상대적 가중치화 점검항목별 중요도를 적용하여 시설물의 위험도를 평가할수 있는 평가모델을 제안하였다.