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임경수(K . S . Lim),김진우(J . W . Kim),최영미(Y . M . Choi),정인석(I . S . Jung),정영기(Y . K . Jung),서동룡(D . R . Seo),박두복(D . B . Park) 대한소화기학회 1990 대한소화기학회지 Vol.22 No.4
Multiple cnacers frequently develop in the colon and rectum. It is often difficult to detect all these multiple lesions preoperatively: a correct diagnosis is frequently obtained only upon examination of the resected specimen. Triple synchronous primary golon cancer is an exceedingly rare disease. Despite of its rarity, multiple colon cancers should be investigated in the patients in whom clinical or laboratory evidence of colon cancer is suspected. We experienced one case of triple synchronous primary colon cancer recently and report here with the review of the literature.
핵연료 피복관 부식생성물 부착에 관한 Ni/Fe 이온 농도비의 영향
백승헌 ( S H Baek ),김우철 ( U C Kim ),심희상 ( H S Shim ),임경수 ( K S Lim ),허도행 ( D H Hur ) 한국부식방식학회(구 한국부식학회) 2014 Corrosion Science and Technology Vol.13 No.4
The objectives of this study are to investigate the effect of the concentration ratios of Ni and Fe ions on crud deposition onto the fuel cladding surface in the simulated primary environments of a pressurized water reactor. Crud deposition tests were conducted in the Ni and Fe concentration ratios of 20:20 ppm, 39:1 ppm and 1:39 ppm at 325℃ for 14 days. In the case of the same Ni and Fe ion ratio (20:20), nickel ferrite with a polyhedral shape was formed. Nickel oxide deposits with a needle shape were formed in the condition of high Ni to Fe ion ratio (39: I), While polyhedral iron oxide and needle-like nickel oxide formed in the condition of low Ni to Fe ion ratio (1:39). The amount of deposits increased, when Fe oxides were formed. This indicates that Fe rich oxides stimulated Ni oxide deposition.
백승헌 ( S H Baek ),김우철 ( U C Kim ),심희상 ( H S Shim ),임경수 ( K S Lim ),원창환 ( C H Won ),허도행 ( D H Hur ) 한국부식방식학회(구 한국부식학회) 2014 Corrosion Science and Technology Vol.13 No.2
The purpose of this work is to investigate the effect of dissolved hydrogen concentration on crud deposition onto the fuel cladding surface in the simulated primary environments of a pressurized water reactor. Crud deposition tests were conducted in the dissolved hydrogen concentration range of 5~70 cc/kg at 325℃ for 14 days. Needle-shaped NiO deposits were formed in the hydrogen range of 5~25 cc/kg, while polygonal nickel ferrite deposits were observed at a hydrogen concentration above 35 cc/kg. However, the dissolved hydrogen content seems to have little effect on the amount of crud deposits.