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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.
강희석,이한수,정흥석,안도희,손순환,정양근,송명재 ( Hee Suk Kang,Han Soo Lee,Hongsuk Chung,Do Hee Ahn,Soon Hwan Son,Yang Geun Chung,Myung Jae Song ) 한국공업화학회 1996 공업화학 Vol.7 No.4
중수형 발전소에서 삼중수소 제거 공정에 이용되는 소수성 고분자촉매의 담체인 스티렌-디비닐벤젠 공중합체의 제조 특성을 실험하였다. 스티렌-디비닐벤젠 고분자담체의 제조시 담체의 표면 특성에 대한 용매의 영향을 고찰하기 위하여 일정한 용매계에서 용매비를 변화시켜 solvating power 값을 구하였다. 거시기공 형태의 담체가 제조되기 위한 solvating power는 가교도가 20%일 때 3 이상, 가교도가 40%일 때는 1 이상의 값이 필요하였으며 약 40℃에서 2시간 이상 용액의 안정이 필요하였다. 또한 후처리 방법은 담체를 건조시키기 전에 용매를 제거하는 방법이 가장 우수한 기공 특성을 나타내었다. 담체의 입자 크기는 교반속도 및 계면활성제의 농도가 낮을수록 더 크게 생성됨을 알 수 있었다. This study represents the synthetic characteristics of styrene-DVB copolymer which is used as a catalyst support for the removal of tritium in CANDU. To evaluate the effect of solvent on the styrene-DVB polymeric support, the solvating power dependent on various kinds and composition of solvents was calculated. In order to synthesize the macroreticular type polymer bead, the following conditions are needed; solvating power should be higher than 1 for 20% of crosslinkage and higher than 3 for 40% of crosslinkage. Stabilization of organic monomers at about 40℃ for more than 2 hours is prerequisite. Removal of solvent prior to drying is preferred for the post-treatment of the bead. The polymer particle size was increased by lowering concentration of surfactant and stirring speed.