[en] The effect of minor additions of carbon and hafnium on the microporosity of single crystal superalloy RR2086 has been investigated. The results provided additional evidence that carbon has a positive effect on the alleviation of microshrinkage in this alloy system

[en] We propose a giant magnetoresistance (GMR) device, which can be experimentally realized by depositing two ferromagnetic (FM) strips and a Schottky metal (SM) stripe in parallel configuration on top of the GaAs heterostructure. The GMR effect ascribes a significant electron transmission difference between the parallel and antiparallel magnetization configurations of two FM stripes. Moreover, the MR ratio depends strongly on the magnetic strength of the magnetic barrier (MB) and the electric barrier (EB) height induced by an applied voltage to the SM stripe. Thus, this system can be used as a GMR device with tunable MR by an applied voltage to SM stripe or by magnetic strength of the MB.

[en] The KJRR (KiJang Research Reactor) has been under construction since April 2012 in the local government province of KiJang, located near Busan city, in a bid to self-sufficiently provide domestic radioactive isotopes and extend the silicon (Si) doping capacity for coping with the growing industrial power device market and utilizing scientific researches in the neutronics field in Korea. The driver fuel of the KJRR was selected as a U-Mo dispersion fuel, which would be the first kind of a U-Mo fuel in a research reactor ever. Through comprehensive surveillance of the fuel’s in-reactor behavior, KAERI has determined a fuel meat of U-7%Mo/Al-5%Si. The KJRR has two kinds of fuel assemblies, 16 Standard Fuel Assemblies (SFAs) and 6 Follower Fuel Assemblies (FFAs), in the core. This paper deals with the design and preliminary evaluation of the fuel integrity of the basic designed KJRR fuels to determine whether it maintains its integrity during its intended reactor operations. It includes the bases of the design criteria and their limits. (author)