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원자력등급 ESF 공기정화계통 시뮬레이터 제작 및 활용에 관한 연구
이숙경,김광신,손순환,송규민,이계우,박정서,홍순준,강선행,Lee, Sook-Kyung,Kim, Kwang-Sin,Sohn, Soon-Hwan,Song, Kyu-Min,Lee, Kei-Woo,Park, Jeong-Seo,Hong, Soon-Joon,Kang, Sun-Haeng 한국방사성폐기물학회 2010 방사성폐기물학회지 Vol.8 No.4
A nuclear plant ESF ACS simulator was designed, built, and verified to perform experiment related to ESF ACS of nuclear power plants. The dimension of 3D CAD model was based on drawings of the main control room(MCR) of Yonggwang units 5 and 6. The CFD analysis was performed based on the measurement of the actual flow rate of ESF ACS. The air flowing in ACS was assumed to have $30^{\circ}C$ and uniform flow. The flow rate across the HEPA filter was estimated to be 1.83 m/s based on the MCR ACS flow rate of 12,986 CFM and HEPA filter area of 9 filters having effective area of $610{\times}610mm^2$ each. When MCR ACS was modeled, air flow blocking filter frames were considered for better simulation of the real ACS. In CFD analysis, the air flow rate in the lower part of the active carbon adsorber was simulated separately at higher than 7 m/s to reflect the measured value of 8 m/s. Through the CFD analyses of the ACSes of fuel building emergency ventilation system, emergency core cooling system equipment room ventilation cleanup system, it was confirmed that all three EFS ACSes can be simulated by controlling the flow rate of the simulator. After the CFD analysis, the simulator was built in nuclear grade and its reliability was verified through air flow distribution tests before it was used in main tests. The verification result showed that distribution of the internal flow was uniform except near the filter frames when medium filter was installed. The simulator was used in the tests to confirm the revised contents in Reg. Guide 1.52 (Rev. 3).
Reg. Guide 1.52(Rev.3)를 적용한 원전 ESF 공기정화계통 성능시험법 개선 연구
이숙경,김광신,손순환,송규민,이계우,박정서,조병호,유병재,홍순준,강선행,Lee, Sook-Kyung,Kim, Kwang-Sin,Sohn, Soon-Hwan,Song, Kyu-Min,Lee, Kae-Woo,Park, Jeong-Seo,Cho, Byoung-Ho,Yoo, Byeang-Jea,Hong, Soon-Joon,Kang, Sun-Haeng 한국방사성폐기물학회 2010 방사성폐기물학회지 Vol.8 No.4
U. S. NRC Regulation Guide 1.52 regulating ESF ACS in nuclear power plants has been revised to revision 3. To apply reduction of operability test time, allowance of alternative challenge agents for in-place leak test of HEPA filters, and upgrade of Methyl Iodide penetration acceptance criterion in activated carbon performance test suggested in Reg. Guide 1.52(Rev.3) on Yonggwang units 5 and 6 ESF ACSes, technical feasibility study was carried out with on-site experiments as well as experiments with a lab-scale model. It was confirmed that the moisture in the system returned to the level before the test in 1 or 4 days even though the moisture was removed during the operability test lasting more than 10 hours. Therefore, it is appropriate to perform monthly operability test in 15 minutes just long enough to check the operability of equipment. To change challenge material for in-place HEPA filter leak test, size of aerosol, production rate, and leak detection capability were compared for DOP and PAO. It was concluded that PAO can be substituted for DOP in nuclear power plants. The upgrade of Methyl Iodide penetration acceptance criterion from 0.175 % to 0.5 % in active carbon filter bed deeper than 4 inches was to conform to the change of activated carbon performance test method to ASTM D3803(1989). It was confirmed that Methyl Iodide penetration acceptance criterion of 0.5 % under $30^{\circ}C$, relative humidity 95 % condition was conservatively good enough for testing performance of active carbon insitu. The licence change of Yonggwang units 5 and 6 has been completed based on this study.
일 대학 신설간호학과 1회 졸업예정자들의 대학생활 경험에 관한 연구
이숙경(Lee, Sook-Kyung),홍주은(Hong, Ju-Eun) 한국간호교육학회 2014 한국간호교육학회지 Vol.20 No.4
Purpose: This study explores the experience of university life in an unfamiliar department by first-year graduate students. Method: Data were collected from participants through focus group interviews between July and August 2013 using phenomenological research methods. Colsizzi’s method was used for analysis after the institutional review board of the university approved the study and informed consent was obtained from the participants. All interviews were recorded on an MP3 recorder and transcribed. Results: The analysis revealed 51 meanings that were categorized by 15 key words into 6 themes: “sense of isolation,” “feeling of solidarity,” “limitations,” “benefits,” “overcoming” and “renewing.” Conclusion: First-year graduate students experience both positive and negative feelings toward “university life”; however, they eventually overcome their difficulties and adapt to the conditions of their field of study and new department.
Trichophyton Mentagrophytes에 의한 가성균종
이숙경 ( Sook Kyung Lee ),이봉길 ( Bong Kil Lee ),이흥렬 ( Heung Ryul Lee ),이원우 ( Won Woo Lee ) 대한피부과학회 1996 대한피부과학회지 Vol.34 No.3
Dermatophytes have been demonstrated infrequently in viable tissues such as dermis, subcutis, lymph nodes, bones and other organs. Mycetoma-like lesions caused by dermatophytes, known as pseudomycetoma, have been very rarely reported. A 56-year-old woman presented with several protruding bean to chestnut-sized subcutaneous nodules on the occipital region of the scalp. She had a long term history of epidermolysis bullosa acquisita and intermittent administration of systemic corticosteroids for 5 years. Histopathology of the subcutaneous nodules showed a well encapsulated granuloma containing characteristic lobulated granules consisted of mycelial aggregates. Trichophyton mentagrophytes grew out on the cultures of Sabouraud's media with excised tissues. Surgical excision and itraconazole 200mg per day for 10 weeks was tried and skin lesions are improved with focal recurrence. (Kor J Dermatol 1996;34(3): 480-484)
대상포진 입원환자에서 운동신경 마비에 관한 임상적 연구
이숙경 ( Sook Kyung Lee ),손현호 ( Hyun Ho Son ),심현수 ( Hyun Soo Sim ) 대한피부과학회 2011 大韓皮膚科學會誌 Vol.49 No.11
Background: Although herpes zoster primarily affects afferent sensory neurons, it may complicated by motor nerve involvement in 0.5% to 5% of cases. However herpes zoster-induced muscle paresis is still under-recognized by dermatologists, and there has been insufficient clinical investigation of these conditions. Objective: This study was conducted to investigate the clinical aspects of motor nerve involvement of herpes zoster. Methods: We retrospectively reviewed the data of 711 patients with herpes zoster who had been admitted to our hospital in the departments of dermatology, ophthalmology, otorhinolaryngology, neurology, neurosurgery and rehabilitation medicine between 2005 and 2010. Results: Among the 711 patients with herpes zoster, 15 patients had motor paresis (2.1%). 11 patients (73.3%) had facial nerve palsy including one patient who had accompanying vagus nerve palsy. Besides, one case of trochlear nerve palsy, one case of hypoglossal nerve palsy, one case of upper limb paresis and one case of lower limb paresis were noted. Associated underlying diseases were observed in nine patients (60.0%). Duration of motor weakness ranged from 1 month to 4 years. Twelve patients (80.0%) achieved complete recovery. Conclusion: In our patient population, the incidence of motor involvement of herpes zoster was higher in cranial nerves, especially the facial nerve, than in spinal nerves. Although motor nerves are usually involved in relation to dermatome, cranial nerve palsy may occur regardless of its dermatome because of complicated anatomical association. The majority of cases recovered completely without any complications. Further prospective investigation with a large group of patients is necessary to better understand the epidemiology of motor nerve involvement of herpes zoster. (Korean J Dermatol 2011;49(11):961∼968)
이숙경(Lee Sook Kyung) 질적연구학회 2010 질적연구 Vol.11 No.2
Purpose: This study was conducted to explore the experiences of the value of nurses' professionalism by a grounded theory. Methods: There were 32 participants who had used inpatient services and/or provided care for family members admitted to inpatient clinics. A grounded theory method was used based on symbolic interactionism. Results: 88 concepts, 37 subcategories, and 15 categories were derived from the analysis of Strauss & Corbin. The central phenomenon was "unburdening of load" and the core category was being professional". Conclusion: The development of such skills can promote an increase in knowledge and clinical resources in health services particularly in hospital care.