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조남진,신평식,김우창,Cho. Nam Jin,Sin. Pyung Sik,Kim. Woo Chang 한국방재학회 2014 한국방재학회논문집 Vol.14 No.2
원전의 원자로 압력경계 기기 중에서 가압기 맨웨이에 사용되는 볼트는 건전성이 상실될 경우, 발전소 안전성에 영향을 미칠 가능성이 높기 때문에 설계 수명기간 동안 건전성이 유지되어야 한다. 그러나 원전 압력경계 기기에 사용되는 볼트의 부식 및 균열에 대한 사례보고가 있기에 이에 대한 관리가 필요하다. 이에 따라 본 논문에서는 볼트의 손상으로 인해 발생하는 누설률을 통해 현재 가동 중인 발전소의 허용 안전성에 대해 알아보고자 한다. 맨웨이 볼트 손상에 따른 간극을 수치해석 프로그램인 ANSYS를 사용하여 예측하고, 누설률 평가에는 SQUIRT 코드를 사용하여 평가하였다. 해석결과 볼트손상 수량이 1개일 경우에 허용기준치인 1 gpm 이하인 것으로 판단된다. 비록 현재의 설계 볼트 수가 충분한 안전율을 확보한다고 판단되지만, 맨웨이 손상 볼트에 따른 누설률을 감안하면 주기적인 점검을 통해 볼트의 건전성을 판단하여야 할 것이다. In nuclear power plant, defected bolts used in pressurizer manway could have bad effect on the safety of the plant. Thus, the bolts should maintain their integrity while used in the plant. However, damaged bolts, such as corroded or cracked bolts, have been reported; thus, well-organized monitoring is required. This study evaluates safety of bolts currently used in a nuclear plant using the leakage rate. Using ANSYS program, the opening of a manway due to damaged bolts is estimated and corresponding leakage rate was estimated by SQUIRT code. The results exhibit that even in the case of 3 damaged bolts the leakage rate satisfies the allowable level, 1 gpm. However, continuous in-service inspection is still required to ensure the safety of bolts as considering the development of leakage rate.
초등학교 아동의 스트레스 생활사건과 대처방식, 건강문제에 관한 연구
조남진,박인숙,Cho Nam Jin,Park In Sook 한국아동간호학회 1998 Child Health Nursing Research Vol.4 No.2
The purpose of this study was to examine the stressors and stress coping styles of 6th grade el ementary school children and to explore the relationship between stressful life events and health symptoms and the effects of coping style which is theoretically considered to mediate the relationship between stress and health symptoms. The study subjects consisted of 329 in 6th grade elementary school children in Cheong-Ju city. Of the 329 subjects, 171 were boys and 158 were girls. For this study, three kinds of questionnaires were adopted as follows ; 1) Feel Bad Scale (FBS) by Lewis et al., 2) lazarus-Folkman's Way of coping questionnaire 3) Hee Sun Shin's Health Symptom questionnaire (HSQ) The researcher visited the school and collected data in the class using the questionnaire method after an explanation of the purpose and procedures was given to the children. Data collection was done for 10 days (from 5th to 15th of July 1997) . The data were analyzed by descriptive statistics, correlation analysis, multiple regression analysis using the SAS statistical program. The results of this study were as follows : 1. The mean score for the FBS was 211.37(range : 77-427), The most severe stressors perceived by children were parental divorce and other's smash or steal of my things. The most frequently experienced stressful life events were conflict with siblings and being scolded for other's fault. 2. The most frequently used stress coping style was the active coping (M=17.85), followed by passive (M=13.64) and magical one (M=13.42). 3. The mean score for the HSQ was 23.30(range : 0-72) The most frequently complained health symptoms were headache and having much worry about everything. 4. There was a significant relationship between stressful life events and health symptoms (r=.60, p<.001). Also, stressful life events were positively related with passive coping(r=.27, p<.001) and magical coping (r=.38, p<.001). Health symptoms were positively correlated with passive coping(r=.33, p<.001) and magical coping (r=.41, p<.001). 5. Stepwise multiple regression analysis revealed that the most powerful predictor was the variable of stressful life events. Health concerns, magical coping style, passive coping style and active coping style accounted for 49.15% of the variance in health symptoms. This study revealed that stressful life events correlated with health symptoms in 6th grade elementary school children and passive coping and magical coping had mediating effects on this relationship. The implication for nursing is that there is a need to develop supportive interventions for high risk population to decrease health problems due to stress.
조남진(Cho, Nam-Jin) 인천대학교 인천학연구원 2004 인천학연구 Vol.3 No.-
This study is intended to discuss the image of Incheon represented in Lee-sang s work, such as Gizuhoishi , Nalgae , Bongbyeolki . Giving attention to Incheon, the space-background of Lee-sang s Gizuhoishi , is due to the peculiar role of Incheon in Gizuhoishi . Lee-sang s space-background is mostly possessed of the closed-space . In contrast, Gizuhoishi takes the image of the open-space . This image in Gizuhoishi shows the image in Incheon at that time, and represents the unique image as the open-space in comparison with others in Lee-sang s works. Considering Incheon City as the space-background in Gizuhoishi can get out of the current study until now, the self-conscious or psychological approach about Leesang, and form the basis of the objective approach to Lee-sang and his works. Therefore, this study can have a profound significance to the approach of Lee-sang as one of the modernists, who took the ground of cities as the space-background. Furthermore, I think, this approach of the image of Incheon in Lee-sang s works can bring a new ground on the identity of Incheon.
조남진(Cho Nam jin),임동수(Im Dong su),윤홍걸(Yoon Hong gul),서효석(Seo Hyo seok),윤기열(Yun Ki youl) 한국방재학회 2017 한국방재학회논문집 Vol.17 No.2
원자력발전소 격납건물 내부에는 부식방지, 제염, 내화기능 등의 목적으로 방호도장이 시공되어 있다. 격납건물 내부도장에 결함이 있을 경우, 지진, 화재 등에 의한 설계기준사고(Design Basis Accident) 발생 시 격납건물 살수계통의 작동으로 분사되는 고압의 분무수로 인해 도장이 벗겨질 가능성이 크다. 이로 인한 재순환냉각계통의 기능상실로 대규모 사고를 가져 올 수 있다. 격납건물 내부 방호도장의 상태점검을 해본 결과 일부에서 다양한 형태의 결함들이 발견되었다. 이렇게 발견된 결함들의 원인을 분석하고, 방호도장의 건전성을 평가하기 위해 기존 도장재와의 동질성 분석 및 열노화상태 평가를 수행하였다. 시험결과를 통해 가동중 원전에 적용되고 있는 도장은 전반적으로 건전성을 유지하는 것으로 평가되기는 하였으나, 향후 관련 기술 및 평가방법론에 대한 추가적인 연구가 필요할 것으로 판단된다. Inside the containment buildings of Nuclear Power Plant, protection coatings are installed to prevent corrosion, decontamination, and fireproof. If there is a defect in the coating, there is a high possibility that the coating will be peeled off due to the operation of the containment building Spray system when a design basis accident occurs due to an earthquake or fire. This can lead to massive damage due to the loss of functionality of the recirculation cooling system. various defects are found in the protective coatings inside the containment buildings. In order to analyze the causes of these defects and evaluate the integrity of the protective coating, we analyzed the homogeneity with the existing paint and evaluated the thermal aging condition. Through the test results, the state of the painting was evaluated to maintain overall soundness, however, further research on related technologies and evaluation methodologies will be needed in the future.