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APR1400 원자로냉각재계통 스너버의 비구속기능 상실의 영향 평가
황병천(Byung Chun Hwang),이한걸(Han Gul Lee),전장환(Jang Hwan Jheon),성기광(Ki Kwang Sung),김현민(Hyun Min Kim) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
This study assesses the effects of a failure of snubber installed on two Steam Generators(SGs) and four Reactor Coolant Pumps(RCPs) in the APR1400 Reactor Coolant System(RCS) under normal operation(NOP) conditions. The analysis results show that the single snubber failure i.e., lockup, during the normal operation conditions has somewhat severe effects especially on the inlet nozzle of the SG and the outlet nozzle of the RCP. However, the resultant load increases on the RCS will be limited to a certain level since the failed snubber does not act as a restraint any more beyond the snubber load rate, and a stress evaluation reveals that the resultant stress intensities remain below the allowable. Additionally, the analysis results also show that the single snubber failure effects are confined to the component having the failed snubber. Accordingly, the single snubber failure in the RCS will not degrade the structural integrity of the RCS.
격강구(隔薑灸)의 연소(燃燒) 특성(特性)에 관한 실험적(實驗的) 연구(硏究)
이건목,이건휘,문성재,황병천,국우석,장지연,김양중,장재호,윤주영,Lee, Geon-mok,Lee, Geon-hui,Moon, Sung-jae,Hwang, Byung-chun,Guk, Uo-suk,Jang, Ji-yeon,Kim, Yang-jung,Jang, Jae-ho,Yun, Ju-young 대한침구의학회 2004 대한침구의학회지 Vol.21 No.3
Objective : The purpose of this study is to investigate the mechanism and effect of moxibustion with ginger objectively, to be used as the quantitative data through the measurement of temperature, and to grasp the thermodynamic characteristics of moxibustion with ginger. Methods : We have selected the indirect moxibustion with ginger among many indirect moxibustions. We produced a slice of ginger to a thickness of 3, 4, 5mm and the moxa cone having a diameter of 8mm, a height of 10mm for making a comparative study of characteristics of moxa cone according to change the density. We have made a comparative study of the thermodynamic characteristics of moxibustion with ginger with or without holes. We measured combustion times and calculated temperatures, temperature gradients in each period during a combustion of moxa. Results : 1. We found out it was not significantly influenced by the existence of the punched holes in a slice of ginger because the punched holes grow smaller immediately. 2. The duration of the preheating period became longer according to thickness of a slice of ginger and was not directly proportional to the density of moxa cone. The duration of the preheating period was extremely short when it burned a 100mg moxa cone. That was influenced by the density of moxa cone. 3. The duration of the heating period became longer according to thickness of a slice of ginger likewise the preheating period bacause the density of moxa cone had effected on the combustion characteristics. The duration of the heating period was extremely long when it burned a 100mg moxa cone. On the other hand the maximum temperature in the heating period was appeared that the combustion with a thin slice of ginger was highest and measured that the large density of moxa cone was higher. But the maximum temperature in the heating period was about $37.8^{\circ}C{\sim}44.2^{\circ}C$respectively lower in others. 4. The duration of the retaining period was some doubling shorter than that of the heating period that is concerned the shape of moxa cone. The temperature measured the close of a retaining period was $36.6^{\circ}C{\sim}41.8^{\circ}C$, that was considerably lower temperature. 5. The mean ascending temperature velocity and the mean descending temperature velocity were $0.042{\sim}0.073^{\circ}C/sec$, $-0.027{\sim}-0.064^{\circ}C/sec$ respectively. Then, the ascending temperature velocity was some faster than the ascending temperature velocity. Conclusions : The quantitative standard for obtaining the effective heating stimulation is that if the slice of ginger made a hole in it, we had to use the needle above 1.5mm diameter. The recommended size of a slice ginger is the 14mm diameter and the 2~3mm thickness. The moxa cone is formed the conical shape that the base diameter was 8mm, the height was 10mm, the density was $600mg/cm^2$.
봉약침(蜂藥鍼)을 위주로 한 요추추간판탈출증(腰椎椎間板脫出症)의 돌출형(突出型) 환자(患者)(protrusion disc patients)에 대한 임상적(臨床的) 고찰(考察)
이건목,이길숭,염승철,장재호,윤주영,황병천,국우석,장지연,최정선,김양중,박종운,조남근,Lee, Geon-mok,Lee, Kil-soong,Yeom, Seong-chul,Jang, Jae-ho,Yun, Ju-young,Hwang, Byung-chun,Kug, Yu-suk,Jang, Ji-yeon,Choi, Jeong-seon,Kim, Yang-jung,Par 대한침구의학회 2004 대한침구의학회지 Vol.21 No.5
Objective : Herniation of Nucleus Pulpous(HNP) of Lumbar is the most important reason that causes low back pain. The aim of this study is to investigate the effectiveness of Bee-venom acua-acupuncture therapy for protrusion disc patients. Methods : To evaluate the effectiveness of Bee-Venom Acupuncture Therapy, 20 patients were treated by bee-venom acua-acupuncture therapy. To estimate the efficacy of treatment, we used Quardruple Visual Analog Scale(QVAS). Results : 1. As a objectivity treatment record, they test treatment record good 60%, fair 25%, excellent 15%. 2. After bee-venom therapy, pain rate changed from 8.25 to 2.15. 3. By the results which puts out the statistics in sex, a pain rate of male changed from 8.75 to 2.50, a pain rate of female 7.92 to 1.92. Intentional difference is none as a therapy. By the results which puts out the statistics in age, after forties changed from 7.78 to 2.22 and before forties changed from 7.90 to 1.92. By the results which puts out the statistics in disc herniation, pain rate of central type changed from 8.29 to 2.29, pain rate of left type changed from 8.20 to 1.40, pain rate of Right type changed from 8.00 to 4.00.