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연구로 2호기 수조 콘크리트의 $^3H$ 및 $^{14}C$ 공간분포
홍상범,김희령,정근호,강문자,정경환,정운수,박진호,Hong, Sang-Bum,Kim, Hee-Reyoung,Chung, Kun-Ho,Kang, Mun-Ja,Jeong, Gyeong-Hwan,Chung, Un-Soo,Park, Jin-Ho 한국방사성폐기물학회 2006 방사성폐기물학회지 Vol.4 No.4
The depth distributions of total $^3H$ and $^{14}C$ activities were characterized for the activated shielding concrete from a decommissioning of KRR-2 using the commercially available tube furnace and a liquid scintillation counter. The correlation of measurement results between $^3H,\;^{14}C$ and gammer emitter was evaluated to apply for estimating radionuclide inventory of the concrete waste generated from decommissioning KRR-2. The detection limits for $^3H$ and $^{14}C$ are 0.048 and 0.028 Bq/g respectively. The specific activities of the $^3H$ and $^{14}C$ tend to decrease exponentially as the depth of the concrete becomes deeper from the surface. In addition, the $^3H$ and $^{14}C$ activities were in good correlation with the $^{60}CO$ activities analysed for the shielding concrete of KRR-2.
차재은(Jae-Eun Cha),김희령(Hee-Reyoung Kim),김종만(Jong-Man Kim),남호윤(Ho-Yoon Nam),김성오(Sung-O Kim),김병호(Byung-Ho Kim) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The magnetohydrodynamic(MHD) pressure drop along a liquid sodium flow was measured in a rectangular duct under a transverse magnetic field. The test section was made of a 3 ㎜ thick stainless steel SUS304 with a 74×5 ㎟ rectangular flow channel. The range of experimental parameters was roughly B = 0~0.18T and U=0~0.9㎧ at around 200℃. The differential pressure was measured by a diaphragm seal-type pressure transmitter filled with a high temperature silicon oil within 0.1㎫. The experimental results show a similar pressure drop with the theoretical estimation according to a change of the flow velocity and the magnetic field.