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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.
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).
이숙경 ( Sook Kyung Lee ),이현철 ( Hyeon Cheol Lee ),이흥렬 ( Heung Ryul Lee ),이원우 ( Won Woo Lee ),김동희 ( Dong Hees Kim ) 대한피부과학회 1995 대한피부과학회지 Vol.33 No.5
Cirsoid aneurysm of the calp is a congenital arteriovenous malformation which is the result of abnormal connections betwe:.n the external carotid artery and scalp veins with a subsequent dilatation of vascular channels nd formation of aneurysm. We report a case of cirsoid aneurysm of the scalp on the left parieto-occipital area of 14-year-old female who had had 8 x 5 x 0.8 cm sized pulsating soft mass for 2 years. 4 vessel angiog raphy revealed a arteriovenous malformation that emerge mainly from a superficial temporal artery and occipital artery of the left external carotid artery and partially from the right superficial temporal artery and drined into the left scalp vein. The mass was removed by excision with ligation of the feeding arter es and followed up for 2 years without recurrence. (Kor J Dermatol 1995;33(5): 940-944)
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)
이현철 ( Hyun Cheol Lee ),이숙경 ( Suk Keyong Lee ),이흥렬 ( Heung Ryul Lee ),이원우 ( Won Woo Lee ),김덕하 ( Duck Ha Kim ) 대한피부과학회 1995 대한피부과학회지 Vol.33 No.5
Prurigo pigmentosa is a chror ic pruritic inflammatory dermatosis characterized by erythematous papules in a reticulated pattern that resolve leaving a reticulated, mottled hyperpigmentation and rapidly response to dapsone therapy. Most cases that have been reported are from Japan. We report two cases of prurigo pigmentosa in a 21 year-old female and a 23-year-old female. Histopathologic findings of erythematous papules showed exocytosis, spongiosis, liquefaction degeneration of basal cell layer and perivascular lymphohistiocytic infiltration on the upper dermis. We treated them with dapsone, 100mg daily, which resulted in a remarkable regression of the ery thematous papules and improvenien of pruritus. (Kor J Dermatol 1995;33(5): 945-949)