CFD 해석을 이용한 누설 포집 시스템 해석 방법 수립 및 평가

최대경,박원만,어동진,권태순,최청열 한국유체기계학회 2023 한국유체기계학회 논문집 Vol.26 No.5

Suppose a small amount of leakage exceeds the limit of the operating conditions of a nuclear power plant. In that case, losses due to the nuclear power plant shutdown may occur, or accidents due to leakage may occur. Consequently, there has been a need to develop a system capable of quickly detecting even small amounts of leakage, and research has been conducted to address this need. To develop such a system, it is necessary to understand the thermal-hydraulic characteristics of the system. This study established a CFD-based evaluation process for evaluating leak detection systems. A numerical analysis model was used to simulate leakage, and a two-step CFD analysis was performed to assess its applicability. In the first step, a study of the leakage behavior in the insulation material was conducted, and the effect of the gap between the pipe insulation material and the outer cover was evaluated. In the second step, the collection loop was analyzed using the results of the leakage behavior analysis in the insulation as an input condition. The results of this study were used to construct the collection loop experimental device and will help in understanding the heat flow characteristics in the collection loop.

난소임신 2 예

최대경,전선희,임경주,김두표,이남섭,이정래 대한산부인과학회 1994 Obstetrics & Gynecology Science Vol.37 No.7

저자 등은 최근 본병원 산부인과에서 Spiegelberg의 진단기준을 충족시키는 난소임신 2예를 경험하였기에 문헌고찰과 함께 이를 보고하는 바이다. Primary ovarian pregnancy occurs within the ovary and on the corups luteum, usually with rupture of the ovary and a massive hemoperitoneum. Primary ovarian pregnancy is comparatively rare in ectopic pregnancy and the Spiegelbergs crieteria shold be fulfilled for the diagnosis of ovarian pregnancy. Two cases of primary ovarian pregnancy which have Spiegelbergs criteria for the diagnosis of primary ovarian pregnancy are presented with a brief review of literatures.

임상실습에 임하는 학생들의 비강 및 피부에 분포된 포도구균과 환자병소에서 분리된 포도구균에 대한 병원성의 연관성에 관한 연구

최대경,김홍선,백태현,권지순 충남대학교 의과대학 지역사회의학연구소 1986 충남의대잡지 Vol.13 No.2

The authors have studied the pathogenecity of staphylococci isolated from 96 patients in Chungnam National University Hospital and Staphylococci isolated from nose and axilla of 50 medical and 50 nursing students in Chungnam National University. The authors conducted the survey from January 1986 to June 1986. The results obtained were as follows : 1. Out of staphylococci isolated from 96 patients, Staphylococcus aureus and Staphylococcus epidermidis were 59.4%, and 32.3%, respectively. In staphylococci isolated from nose of medical and nursing students, Staphylococcus aureus was 13.6^(male), 17.2%(female) and Staphylococcus epidermidis was 61.0%(male), 75.9%(female), respectively. 2. In the biotype of Staphylococcus epidermidis isolated from patients, the rate of biotype 1 was 93.5%. In the staphylococcus epidermidis isolated from nose of medical and nursing students, the rate of biotype 1 was 55.6%(male), 31.8%(female). In the axilla, the rate of biotype 1 was 56.5%(male), 52.6%(female), respectively. 3. In the biotype 1 of Staphylococcus epidermidis isolated from patients and control groups, enzymatic activities were more active than other biotypes. 4. Crystal violet ring test of Staphylococcus epidermidis isolated from patients, biotype 1 was WR type 22.6%, SR type 67.7% and DR type 3.2%. 5. To the antibiotic activities of staphylococci isolated from patients, Staphylococcus aureus was resistant to gentamycin(96.5%), penicillin(78.9%), lincomycin(47.4%) and erythromycine(35.1%). In the nose of medical students, Staphylococcus aureus was resistant to penicillin(11.9%), gentamycin(11.9%), lincomycin(6.8%) and tetracycline(5.1%). 6. In the multiple antibiotic resistance of staphylococci isolated from patients, Staphylococcus aureus was resistant to 2 antibiotics(35.1%), 3 antibiotics(17.5%), 5 antibiotics(15.8%) and, Staphylococcus epidermidis was resistant to 3 antibiotics(32.3%), 4 antibiotics(19.4%) and 5 antibiotics(16.1%).

제56차 추계학술대회 및 총회 : 일반연제 1 ; 피부생물학 1 : 피부 기관 배양을 이용한 방사선 피부염의 연구

최대경,이영숙,남용희,김창덕,서영준,이증훈,박장규,조문준 대한피부과학회 2004 초록집 Vol.42 No.20

韓國産 다람쥐의 結核菌 崔少 感染量에 關한 硏究

崔大卿,柳駿,金周德,金聖光,邊于燮 연세대학교 의과대학 1972 연세의대논문집 Vol.5 No.1

결핵균체 단백항원에 대한 항결핵균 IgG 항체에 관한 연구

최대경,백태현,권지순,심운택,이동배 충남대학교 의과대학 지역사회의학연구소 1985 충남의대잡지 Vol.12 No.2

In order to study the level of IgG antibody binding to sonicate antigen of Mycobacteriumn tuberculosis H_34Rv for ammonium sulfate 30∼40 fraction in sera isolated from 209 patients and. 135 controls were measured by plastic tube enzyme-linked immunosorbent assay (ELISA). The levels of IgG antibody binding to Mycobacterium tuberculosis H_37Rv antigen in sera from all patients and controls were measured after absorption of 1 : 400 diluted sera with ,Wycobacteriuez bovis and dMlycobacterium Kansasii for ammonium sulfate 30∼40 fraction. The authors conducted the survey from August 1984 to January 1985. The results obtained were as follows : 1. At the serum dilution of 1:400, the mean ELISA values of IgG antibody to Mycobacterium tuberculosis H_37Rv after absorption with Mycobacterium kansasii antigen from far advanced patients and control were 0.8666±0.4903 and 0.2058±0.1353, respectively. 2. The mean ELISA value of IgG antibody to Mycobacterium tuberculosis H_37Rv afer absorption with Mycobacterium kansasii antigen from moderate patients was 0.6488±0.3918, the ratio of ammonium sulfate fraction 30∼40 in sera from patients and controls was 3.153. 3. The mean ELISA value of IgG antibody to Mycobacterium tuberculosis H_37Rv after absorption with Mycobacterium kansasii antigen from minimal patients was 0.4205±0.3155, the ratio of ammonium sulfate fraction 30∼40 in sera from patients and controls was 2.043.

원전 내 배관의 증기 누설 사고 시 누설 탐지 포집/이송 시스템 예비 해석

최대경,최청열,권태순,어동진,Choi, Dae Kyung,Choi, Choengryul,Kwon, Tae-Soon,Euh, Dong-Jin 한국압력기기공학회 2020 한국압력기기공학회 논문집 Vol.16 No.2

As leakage in nuclear power plants could cause a variety of problems, it is very critical to monitor leakage from the safety point of view. Accordingly, a new type of leak detection system is currently being developed and flow characteristics of the sampling and transportation system are investigated by using numerical analysis as a part of the development process in this study. The results showed that the steam mass fraction varied according to the effect of the gap between the insulation and piping component, transportation velocity, and material properties of porous media during the sampling and transportation process. The results of this study should be useful for understanding flow characteristics of the sampling and transportation system and its design and application.

병원내에서 분리된 다제 내성 포도구균에 관한 연구

최대경,장명웅,박정규,김세겸,나상연,민병무 충남대학교 의과대학 지역사회의학연구소 1980 충남의대잡지 Vol.7 No.1

In order to know the multiple antibiotic resistance of isolated Staphylococci in the air of various places of Chungnam National University Hospital, 2, 679 bacterial strains were collected at the department of Microbiology, Chungnam National University School of Medicine, during July, 1979. The isolation rate, biochemical character and antibiotic resistance of isolated Staphylococci were studied. The results were summerized as follows: 1. The isolation rate of Staphylococci in the Hospital air were 16.1%(432 strains out of total 2,679 strains). 2. Coagulase activity of the isolated Staphylococci were positive in 314 strains out of 432 strains isolated(72.7%). Among of coagulase positive strains, 126 strains fermented mannitol(29.2%). 3. In the coagulase positive and mannitol fermenter, the isolation rate of resistant strains by one antibiotic was 69.1% (C.P.), 57.9% (L.M.), 35.7% (C.C.), 31.7% (S.M.), 22.2%(K.M.), 19.8%(A.P.), 11.0%(C.D.), and 18.3%(G.M.). 4. The multiple antibiotic resistance of Staphylococci isolated were resistant to 9 anti biotics(1.4%), 8 antibiotics(6.5%), 7 antibiotics(4.6%), 6 antibiotics(5.1%), 5 antibiotics(5.3%), 4 antibiotics(8.6%) 3 antibiotics(14.1%), 2 antibiotics(15.0%) and all antibiotics sensitive(19.9%)

Colchicine이 細菌增殖에 미치는 影響

崔大卿,張明雄,朴鼎圭 충남대학교 의과대학 지역사회의학연구소 1981 충남의대잡지 Vol.8 No.2

Attentions have been devoted to the effects of colchicine on the growth and biochemical characteristics of Bacillus subtilis (ATCC 6633) and Staphylococcus aureus (phage type 29) in BHI broth containing 1 and 5 mg per ml of colchicine. The results were summarized as follows: 1. Growth of Bacillus subtillis was decreased after 12 hours exposure to the 1 mg per ml of colchicine but growth of Staphylococcus aureus was not influenced to it. 2. Growth of Bacillus subtilis was remarkably decreased after 8 hours exposure to the 5mg per ml of colchicine but Staphylococcus aureus also remarkably decreased after 2 hours exposure to it. 3. One and 5mg per ml of colchicine was not influenced to the biochemical characteristics of Bacillus subtillis and Staphylococcus aureus. As above the result, it was suggested that 1 and 5mg per ml of colchicine was inhibited to growth of some bacteria but its effects was different to the bacterial species or strains. It was not influenced to the biochemical characteristics of some kind of bacteria.

이용업소에서 수집한 귀이개와 귀이개솔에 존재하는 균총에 관한 연구

최대경,백태현,장명웅,김두표,구본길,전영환,이경원,황정순 충남대학교 의과대학 지역사회의학연구소 1979 충남의대잡지 Vol.6 No.1

In Korean barber shops, the ear cleaning instruments (scoop and brush) are usually re-used. So, it will be sources of bacterial and fungal infection and its transmission in the ear. Collected from instruments(98 scoops and 94 brushes) of the 98 different barber shops, were examined the distribution of microorganisms (especially staphylococci and fungi.) Also studied antibiotics susceptibility of the isolated staphylococci which showed coagulase positive The results of this study were summarized as follows: 1. Bacteria were isolated from all specimens (192) and fungi were 139 (72. 5%). In the isolated bacteria, Gram positive cocci were 91. 1%, Gram negative cocci were 33. 9%, Gram positive bacilli were 27. 8% and Gram negative bacilli were 10. 4%. 2. Bacteria and fungi isolated more than two species from the same specimens were 51. 6% and 61. 9%, respectively. 3. Among the isolated 149 strains of Staphylococci, coagulase positive were 61(40.9%). 4. Isolated 61 coagulase positive staphylococci were highly susceptible to the most of antibiotics except for penicillin and ampiciliin. 5. The distribution of fungi from the 192 specimens were Aspergillus sp. 61(31.8%), Penicillium sp. 38(19.8%), Cladosporium sp. 24(12.5%), Neurospora sp. 20(10.4%), Candida sp. 12(6.3%), Alternaria sp. 10(5.2%), Paecilomyces sp. 7(3. 6%), Rhizopus sp.6(3.1%), Mucor sp. 6(3.1%), Phoma sp. 5(2.6%), Hormcdendrum sp. 5(2.6%), Fusarium sp. 3(1.6%). Trichothecium sp, 2(1.0%), Helmithosporium sp. 2(1.0%), Mycelia sterila, Verticillium sp. , Pullula is sp. and Gliocladium sp. isolated 1(0.5%) strain, respectiv ely. Yeast-like organisms isolated 29(15.1%) strains. Unidentified were 25(13.0%) strains.