Affiliation: | 1. Technical Research Laboratories, POSCO, Pohang, 790-300, South Korea 2. Neutron Science Division, Korea Atomic Energy Research Institute, Daejeon, 305-353, South Korea 3. Department of civil Engineering, Chosun University, Gwangu, 501-759, South Korea 4. Neutron Research Department, NRC Kurchatov Institute, 1, Akademika Kurchatova pl., Moscow, Russia
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