No abstract available

[en] Recently, Lead-Bismuth Eutectic (LBE) or Lead has newly attracted considerable attraction as a coolant to obtain a greater inherent safety. Above all, LBE is preferred as the coolant and target material for an accelerator-driven system (ADS) due to its high production rate of neutrons, effective heat removal, and a very small amount of radiation damage properties. But, the LBE or lead as a coolant has a challenging problem in that the LBE or Lead is more corrosive to the construction materials and fuel cladding material than sodium because the composing materials of steel, Ni, Cr, and Fe, dissolved in liquid lead or LBE. After all, LBE or Lead corrosion has been considered as an important design limit factor of ADS and LMFBR. Lead-alloy corrosion test loop named KPAL (KAERI Pb-Alloy Loop) has been designed and fabricated at the Korea Atomic Energy Research Institute (KAERI) and the initial operation was performed recently. The test fluids of KPAL-I and KPAL-II were LBE and lead, respectively. The KPAL-I was designed to study the long-term corrosive effects of liquid lead-bismuth on structural and fuel cladding materials at temperatures up to 550 .deg. C. The first run of KPAL-I took place on September 12th, 2006 and dozens of hours of shakedown testing have been performed with an isothermal condition at about 450 .deg. C. The KPAL-I is scheduled to be ready for a 1000-hour material test at 450 .deg. C. The main objective of the present paper is an introduction of KPAL-I and the results of the shakedown testing

No abstract available

[en] Tunneling measurements of quench-condensed In-Mn and Pb-Mn alloy films were made. The results were compared with Shiba's theory of superconductors containing magnetic impurities. The localized excited impurity states predicted by Shiba's theory were observed in both alloys. In addition to s-wave scattering, it was necessary to include p- and d-wave scattering of the conduction electrons in the theory in order to explain the experimental data. Partial agreement between the theory and the experimental data was obtained using phase shifts from band calculations by A.B. Kunz. The results on In-Mn also agree with thermal conductivity data

No abstract available

[en] This paper describes the electrical design and evaluation of the Josephson cross-sectional model (CSM) experiment. The experiment served as a test vehicle to verify the operation at liquid-helium temperatures of Josephson circuits integrated in a package environment suitable for high-performance digital applications. The CSM consisted of four circuit chips assembled on two cards in a three-dimensional card-on-board package. The chips (package) were fabricated in a 2.5-μm (5-μm) minimum linewidth Pb-alloy technology. A hierarchy of solder and pluggable connectors was used to attach the parts together and to provide electrical interconnections between parts. A data path which simulated a jump control sequence and a cache access in each machine cycle was successfully operated with cycle times down to 3.7 ns. The CSM incorporated the key components of the logic, power, and package of a prototype Josephson signal processor and demonstrated the feasibility of making such a processor with a sub-4-ns cycle time

[en] A hard sphere model is used to interpret atomic transport processes in indium-lead alloys. The experimental data lead to hard core diameters of 3.04A for indium and 3.40A for lead. The distances between the origin and the first minimum of the pair potential curves are 3.1A and 3.3 A for indium and lead respectively. Thus, within the accuracy of the data, the results obtained from theory and experiment are in good agreement

[en] In the construction of the ITER, a Test Blanket Module (TBM) will be installed for the verification of the tritium breeding using lithium by neutrons from the plasma. There have been some forms of lithium like solid or liquid one to be considered as a breeding material. In KAERI, liquid lithium material has been considered for the breeding material. Pb-15.7Li, where Li is 15.7 at %, hereafter called PbLi, has been procured and experimented for its basic characteristics. The result will be applied to the operation of a test loop called ELLI (Experimental Liquid Lithium, which is now constructed at KAERI as shown in Figure 1) where effect of magneto-hydro dynamics and materials compatibility will be assessed

[en] Experimental study of creep in lead-tin solder (60/40) has been done using DC electrical potential method. A bimetal test specimen was used. It is found that the method can be employed to predict the failure by observing the electrical potential changes taking place across the test specimen during creep damage. The potential drop can also be used in creep analysis as a parameter instead of stain. Empirical relationship has been proposed to predict the life of lead tin solder. This method can be used for on-line damage monitoring. (author)

[en] Coordinates of liquidus surface in Pb-Se-Te system were determined in 30-50 at% Pb region by differential thermal analysis. Obtained and publication data were used to calculate mathematical model of liquidus surface for 30-94 at% Pb compositions. Compositions of equilibrium condensed phases in 25-90 at% lead region were established by the method of ''the first crystal''