Process Hazard Analysis(PHA) have been performed for a risk management of process (petrochemical) industry for nearly 50 years. There are many PHA methods for application in the process industry, Hazop Study method has been recognized as a good method used typically in most of phase of process plant. And also there was inconvenient opinion that Hazop Study is too resource (man power, time etc.) consuming comparing its result performance (a quality of recommendations) for a good operating and existing plant. In this study, two types of PHA method - checklist and K-PSR - were performed respectively for a new para-xylene(PX)plant and 30 year old PX plant. Past history and experience of incident, operation, maintenance and so on are very important in PHA by those two methods. The higher effectiveness were realized in PHA by a checklist and K-PSR Method than prior Hazop study. And also some suggestions including PHA cycle determination, RBPS application, Follow-up plan of PHA result etc. were proposed about PHA improvement measures for a best risk management.

본 논문은 재범예측결과에 따른 고위험 범죄자 사회복귀 모형을 적용하여 범죄자를 과학적으로 관리 및 처우하여 재범률을 줄이는 것을 목표로 한다. 이러한 목표를 수행하기 위해 선별적 사회복귀 이론(Selective Incapacitation)의 기초가 되는 가설을 검증하기 위해 교정시설 출소자의 재범여부에 대한 추적조사와 통계분석을 실시하였다. 이러한 과정을 거쳐 연구한 결과를 종합하면 소수의 가장 활동적인 누범자 집단이 다수의 강력범죄를 범하기 때문에 이들을 선별하여 집중적인 관리와 처우를 실시한다면 성공적인 사회복귀가 가능할 것으로 기대된다. 아울러 재범예측결과에 따른 선별적 사회복귀모형에 대한 연구결과가 향후 고위험 범죄자의 과학적 처우를 통한 재범방지 대책에 유용하게 활용되기를 기대한다.

In the industrial field, various type of fuel have been used for product processing facilities. Recent for 10 years, the usage of natural gas (NG) was gradually increased. Because it has many merits; clean fuel, no transportation, storage facility and so on. There are common safety concept that strict explosion protection approaches are needed for facilities where explosive materials such as flammable liquid, vapor and gases exist. But some has an optimistic point of view that the lighter than air gases such as NG disperse rapidly, hence do not form explosion environment upon release into the atmosphere, many parts has a conventional safety point of view that those gases are also inflammable gases, hence can form explosion environment although the extent is limited and present. In this paper, the heating equipments (Hot Oil Heater) was reviewed and some risk management measures were proposed. These measures include hazardous area classification and explosion-proof provisions of electric apparatus, an early gas leak detection and isolation, ventilation system reliability, emergency response plan and training and so on. This study calculates Hazardous Area Classification using the hypothetical volume in the KS C IEC code.

해상에서 두 척의 대형 해양경찰 함정을 이용하여 충돌 가능성이 높은 네 가지 조우방위각(000°, 045°, 090°, 135°)을 설정하여 피험자인 30명의 해양경찰관을 대상으로 조우방위별 거리 3해리(Nautical Mile: NM)에서부터 0.25 NM까지 근접하며 상대거리가 점차 감소 될 때 피험자들이 상대선박을 보며 지각한 충돌위험도(Perceived Ship Collision Risk, PSCR)를 측정(0.25 NM 간격으로 기록)하는 실험을 하였 고 획득된 데이터를 이용하여 특징을 통계적으로 분석하였다. 본 연구의 목적은 인적오류 예방을 위하여 실선 실험한 선박 조우방위별 상 대거리 3 NM에서 0.25 NM까지의 열두 구간에서 획득한 충돌위험도 값을 적정 다항식으로 곡선 근사(Curve Fitting)하여 분포곡선으로 나타 내고 특징을 분석하여 항해당직자들이 지각한 충돌위험도의 변화가 최대인 거리를 제시하기 위한 것이다. 분석결과, 각 조우방위에서 거리 구간별 최적의 회귀방정식을 도출하였으며 거리 1.25 1 NM 구간에서 충돌위험도 평균값의 편차가 가장 크게 변화되었고, 특히 1 NM에서 충돌위험도 값이 가장 크게 나타나 실선 실험결과 항해당직자가 지각(Perception)한 충돌위험도의 변화 값이 최대인 거리가 1 NM임을 도출 및 검증하였으며 이는 선박 충돌가능성이 높은 근접상황에서 인적오류 예방 자료로 유용할 것으로 기대된다.

Classify of explosion hazardous areas must be made at the site where flammable materials are used. This reason is that it is necessary to manage ignition sources in of explosion hazardous areas in order to reduce the risk of explosion. If such an explosion hazard area is widened, it becomes difficult to increase the number of ignition sources to be managed. The method using the virtual volume currently used is much wider than the result using CFD(Computational Fluid Dynamics). Therefore, we tried to improve the current method to compare with the new method using leakage characteristics. The result is a realistic explosion hazard if the light gas is calibrated to the mass and the heavy gas is calibrated to the lower explosion limit. However, it is considered that the safety factors should be taken into account in the calculated correction formula because such a problem should be considered as a buffer for safety.

최근 도심지에서 지중매설관의 구조적 결함에 의한 토사 유실로 인해 지하 공동이 빈번하게 발생하고 있다. 본 연구에서는 이러한 지하 공동을 파악하는데 있어 현장 실험 수행 결과 전기비저항 탐사와 공압콘관입시험이 지반 조건의 이상 징후를 탐지하는데 효율적임을 확인하였다. 또한, 이미지 분석을 통한 전기비저항 실험 측정값을 정량화 하여 평균 비저항 값을 산정하는 방법을 제안하였다. 실대형 실험 결과, 평균 비저항 값이 감소할수록 위험도가 증가하였고, 공압콘관입시험 결과, N치가 작을수록 위험도가 높다는 것을 확인하였으며, 제한적인 측정 데이터 수를 토대로 평균 비저항 값과 공압콘관입시험의 결과를 토대로 상관관계를 나타내었을 때, 지반의 지하공동 발생과 관련된 위험 수준을 제한적으로 평가할 수 있을 것으로 판단된다.

소나무재선충병 매개충인 솔수염하늘소(Monochamus alternatus)의 잠재적 서식지 분포를 MAXENT(Maximum entropy, version 3.3.3k) 모형으로 예측하였다. 모형 구동을 위한 자료는 산림청에서 제공하는 2016년도 소나무재선충병 발생 현황 자료와 Worldclim에서 제공하는 1960~1990년 동안의 평균 기후 자료를 사용하였다. 모형 구동결과, 모형의 정확도를 나타내는 AUC(Area Under the Curve) 값은 0.862로 적절하게 나타났으며, 환경 변수의 기여도는 가장 더운 달의 평균기온에서 36.2, 가장 습한 달의 평균기온에서 28.6으로 추정되었다. MAXENT 결과는 솔수염하늘소의 생리적 특징과 기후자료를 종합한 CLIMEX모형 결과와 일본에서 소나무재선충병 발생 위험도 추정을 위하여 개발된 MB(Monochamus, Bursaphelenchus)지수 및 JPS(Japanese Pine Sawyer)지수를 이용한 결과와 각각 비교하였다.

Risk assessment in the manufacturing field has greatly contributed to rationalization and improvement of image of enterprise by preventing of serious accident and through systematic management of pre-risk factors for each manufacturing process, proceduralization of work processes, and simplification of safety management documents. However, as applied to manufacturing industries requiring diversity and complexity,€perfunctory improvement has been carried out. As a result of the study, the current system of risk assessment is generally implemented by upper management, whereas, it turns out that workers who are most exposed to risk have lack of knowledge and understanding of risk assessment. In order to improve the problems in the current system of manufacturing risk assessment and increase practicality, following two methods have been suggested to implement. One is an execution of risk assessment training for manufacturing safety and health and the other is an application of participatory (workers) risk assessment training.

As a result of frequent occurrence of serious industrial accidents due to chemical substances, Korea Occupational Safety & Health Agency has been implementing the PSM system (process safety management) since 1996, and the target sites are required to submit process safety reports. In the semiconductor business, which is becoming smaller and more integrated as the technology advances, many of these hazardous chemicals are used. Most of the semiconductor sites are PSM target sites, and many devices are included in the PSM target equipment. This study optimizes the introduction and setup process of new equipments in the semiconductor workplace using harmful hazardous materials, and conducted an empirical study on the improvement of the safety risk, focusing on the S group semiconductor business, and applied the common standard of work under the PSM system This is an example of improving the risk of leakage of toxic gas components and waste of rework by arranging functions and risks in the space centering method

본 연구에서는 강풍 위험 모델과 강풍 취약도 모델을 개발하여 옥외 광고물의 강풍 위험도를 정량적으로 평가하였다. 강풍 위험 모델과 강풍 취약도 모델 모두 확률론적 접근법인 몬테카를로 모사 모형을 적용하여 개발되었으며, 강풍 위험도 모델은 평가된 강풍 위험과 강풍 취약도의 수학적 계산을 통해서 평가되었다. 강풍 위험은 국내 내륙과 해안지역의 대도시인 서울과 부산 지역에 대하여 평가되었으며, 강풍 취약도 모델은 현장 조사와 문헌 조사를 통하여 파악된 10종의 벽면 이용형, 8종의 돌출형 옥외 광고물을 대상으로 개발되었다. 강풍 위험도에 영향을 미치는 요인을 파악하기 위하여 지표조도구분, 옥외 광고물의 형태, 설치 지역, 설치 높이 등에 따른 강풍 위험도를 정량적으로 평가하였다. 본 연구에서 제안한 강풍 위험도 평가 방법은 강풍으로 인한 옥외 광고물의 손실 추정 및 피해 저감 대책 수립을 위하여 활용될 수 있을 것으로 판단된다.

목 적: 본 연구는 제5기 국민건강영양조사(2012) 자료를 이용하여 한국 성인의 건성안 유병률과 위험요 인을 알아보고자 하였다. 방 법: 19세 이상 성인 중 안과의사에게 건성안 검진을 받은 5,698명(남자 2,368명, 여자 3,330명)을 대 상으로 인구사회학적 특성, 전신질환 특성, 건강관련행위 특성에 따른 건성안의 유병률과 위험요인을 분석 하였다. 결 과: 전체 연구대상자의 건성안 유병률은 13.5%이었다. 인구사회학적 특성별 건성안 유병률은 남성보 다 여성이, 50세 미만군보다 50세 이상군이, 농촌지역보다 도시지역에서 통계적으로 유의하게 높았으며, 전 신질환별 건성안 유병률은 고혈압, 이상지혈증, 골관절염, 류마티스 관절염, 우울증, 신부전증이 있는 경우 에 유의하게 높았다. 건강관련행위별 건성안 유병률은 비흡연자, 비음주자, 수면시간이 짧은 군이 높았다. 건성안 빈도는 여성에서(OR 2.29, CI 1.89-2.77)와 50세 이상군에서(OR 1.21, CI 1.01-1.46), 농촌지역에 서(OR 1.96, CI 1.56-2.47)에서 더 높았다. 유의한 모든 변수를 보정한 후에 건성안의 위험인자는 신부전 (OR 2.82, CI 1.48-5.69), 갑상선(OR 1.62, CI 1.16-2.26), 류마티스 관절염(OR 1.54, CI 1.01-2.33), 이상 지혈증(OR 1.42, CI 1.13-1.78), 우울증(OR 1.36, CI 1.11-1.66), 골관절염(OR 1.27, CI 1.02-1.57)이었다. 결 론: 우리나라 19세 이상 성인의 건성안 유병률은 13.5%으로 높은 수준이며, 50세 이상, 도시지역 거 주자, 여성과 신부전증, 갑상선, 류마티스 관절염, 이상지혈증, 우울증, 골관절염 환자에서 건성안의 위험이 높으므로 해당 위험요인을 가진 사람들을 대상으로 한 교육과 홍보를 통해 건성안증상을 조기 발견하여 적 절하게 대처하도록 할 필요가 있다

This study was conducted to evaluate the risk of overweight and obesity in adolescents consuming snacks frequently from 2007~2009, Korean National Health and Nutrition Examination Survey (KNHANES). The subjects (12~14 years: n=523; 15~18 years: n=614) were presented with food frequency questionnaires, and they were classified according to their gender and frequency of snack consumption. In the age group of 12~14 years, boys and girls (boys OR: 1.11, 95% CI: 0.52~2.39, girls OR: 12.45, 95% CI: 2.26~68.51) who consumed yogurt frequently had a higher risk of overweight and obesity at the highest quartile frequency compared with the lowest quartile after adjustments for multiple confounding factors, including age, physical activity, frequency of eating out and snack consumption, and energy intake. In the age group of 15~18 years, girls (OR: 1.01, 95% CI: 0.34~2.99) consuming fried foods had a higher risk of overweight and obesity at the highest quartile frequency compared with the lowest quartile after adjustments for multiple confounding factors, including age, physical activity, frequency of eating out and snack consumption, and energy intake. Thus, we conclude that frequent consumption of yogurt and fried foods increases the risk of overweight and obesity in adolescents. These findings suggest that the risk of overweight and obesity is associated with the frequency of snack consumption.

우리나라 주요 항만의 입출항 통항패턴을 연구하기 위한 사전 연구로서, 부산항에 입·출항하는 위험화물운반선의 통항량을 항만운영정보시스템(Port Management Information Systim, Port-MIS) 자료를 이용하여 사전 조사하고, 통항량이 가장 높은 각 계절별 연속 3일을 선별하였다. 해양안전종합정보시스템(General Information Center on Maritime Safety & Security, GICOMS) 자료를 이용하여 선별된 12일간 위험화물운반선의 부산항 주요 통항로의 통항 패턴을 분석하였다. 또한 주요 입출항 지점인 북항 오륙도 방파제와 감천항 동방파제의 위험화물운반선의 통항 이격거리를 분석하였다. 항로 단면에서 선박의 궤적이 정규분포를 이룬다는 가정을 근거로 해상교통안전진단 등에서 정규분포의 누적 확률분포 함수를 이용하여 충돌확률을 추정하여 사용하고 있지만, 오륙도 방파제 입출항 및 감천항 동방파제 입항에서의 선박의 항해 궤적은 KS-test 및 SW-test를 이용한 정규성 검정결과 정규분포를 따르지 않는 것으로 평가되었다. 특히 북항에서는 선박의 우측통항 경향이 두드러지게 나타났다. 일반적인 통항이론의 적용보다는 항만의 특성에 맞는 통항모델을 개발하여, 해상교통안전진단 등에서 적용하는 것이 바람직하여 이에 대한 후속연구가 필요할 것으로 판단된다.

This study aimed to compare energy nutrient intake, health related factors, physical characteristics, blood biochemical indices, prevalence of metabolic syndrome and odds ratio (OR) of metabolic syndrome based on dietary fat energy ratio. Subjects were 1,205 men aged 40~64 years. The average fat intake was 52.8 g. Subjects were divided into three groups (deficient, normal, excess) based on dietary fat energy ratio. The dietary fat energy rations of the three groups were 36.9%, 42.9% and 20.2%, respectively. Energy and protein intake were increased significantly with dietary fat energy ratio (p<0.001), whereas carbohydrate intake decreased (p<0.001). In health related factors, amount of smoking alone showed increase based on dietary fat energy ratio (p<0.001). In comparing physical characteristics, blood pressure and blood biochemical indices, excepting diastolic blood pressure, increased significantly based on dietary fat energy ratio (p<0.01~p<0.001). The rate that exceeded criteria in risk factors for metabolic syndrome was higher in the serum triglyceride (41.2%) and was lower in the waist circumference (22.2%). Prevalence of metabolic syndrome was 37.9%, and showed significant correlation to dietary fat energy ratio (p<0.05). The OR of metabolic syndrome was higher in deficient and excess group than in normal group, but it had no relationship between fat energy ratio and metabolic syndrome. The results of this study provide basic data to establish fat intake guidelines for prevention of metabolic syndrome in middle-aged men.

This study was conducted to investigate the risk of chronic disease as predicted by abdominal obesity in Korean adult females. Data on 2,738 adult females aged 40~64 yrs was obtained from the 2013~2014 Korean National Health Nutrition Examination Survey. The subjects were divided into normal (n=1,835), abdominal obesity (AO, n=73), and BMI-diagnosed abdominal obesity (BMI-AO, n=505) groups based on the NCEP-ATP III guidelines and by applying the KSSO definition regarding waist circumference. Triglyceride blood levels, fasting blood sugar levels, systolic blood pressure, and diastolic blood pressure were higher in the AO and BMI-AO groups than in the normal group. The HDL-cholesterol levels of subjects in the two abdominal groups were lower as compared to those of subjects in the normal group. The mean adequacy ratio was lower among subjects in the AO and BMI-AO groups than among those in the normal group. Moreover, the NAR and INQ scores of some micro-nutrients in both of the abdominal obesity groups were lower than those in the normal group. Both the AO and BMI-AO groups showed significantly higher risks of hypertriglycemia, hyperglycemia, hypertension, hypoHDL-cholesterolemia, and metabolic syndrome than were shown by the normal group. Notably, as compared to the normal group, the AO group showed higher risk of hypercholesterolemia, hyperLDL-cholesterolemia, hypertriglycemia, and metabolic syndrome than did the BMI-AO group. This finding suggests that it is essential to develop prevention programs including programs for those with abdominal obesity despite their having a BMI within the normal range.

There are more than 30,000 chemical substances handled in domestic university laboratories. Among them, hazardous materials are selected and managed as designated substances by the standards of 19 Ministries and 16 Acts. However, domestic safety-related laws and regulations are used to manage industrial risk factors based on industrial activities. In case of installing a university chemical laboratory in accordance with the installation standards applicable to general workplaces. It is not suitable to use as a laboratory installation standard that can be applied to a chemical laboratory installed at a university such as a problem occurs in applying to a university using a small quantity of dangerous substances in a small amount. In order to establish the laboratory structure and facility standards that are appropriate for the laboratory characteristics and apply systematic laboratory safety, the National Security Administration shall apply the special handling standard of chemical experiment to places where handling less than 30 times the designated quantity of chemical substances for chemical experiments. On August 2, 2016, the regulations for the enforcement of the Dangerous Goods Safety Management Act and the standards for the structure and facilities of the university chemical laboratory were enacted. In this study, we investigated the domestic chemical substances laws and regulations to determine the chemical substances that are over-regulated in the relevant laws, and define them as substances against accidents. The management criteria for the substances were analyzed. The R value for the designation of the designated quantity by the concept of the space in the management standard was calculated.