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Liu Y.-W.,Huaneng Shandong Shidao Bay Nuclear Power Plant | Liu Y.-W.,Lanzhou University | Gao Z.-M.,Lanzhou University | Du J.,Lanzhou University
Yuanzineng Kexue Jishu/Atomic Energy Science and Technology

Ionization involving the charge transfer and single capture processes, in X q++B (X=C, O; q=1, 2; B=Ne, Ar) collisions in medium-low energy were investigated using the ion beam of accelerator by the position sensitive and time-of-flight techniques. The experimental results indicate that for a given charge state of the incoming projectiles the ratios R of the transfer ionization to single capture change strongly with the projectile energy and correlate to the direct single-electron ionization in the collision. Meanwhile, the peak-position of R is formulated through the experimental analysis, the theorical calculation and the model comparison. Source

Liu Y.,Huaneng Shandong Shidao Bay Nuclear Power Plant | Ma L.,Huaneng Shandong Shidao Bay Nuclear Power Plant | Yan T.,Huaneng Shandong Shidao Bay Nuclear Power Plant
Hedongli Gongcheng/Nuclear Power Engineering

Manipulator crane is one of the key equipments which belong to the fuel handling and storage system (PMC system) in PWRs. In-core positioning is a prerequisite for the first fuel loading, and the security of reactor refueling. Single point positioning method is the prevailing method of reactor core positioning in the domestic PWRs. During the core positioning test with the single point positioning method, the problem that the dummy would bump against the lower internals appeared in a nuclear power plant. Through the innovative core positioning method-four points centre and average step length method, this problem was solved successfully. This paper analyzes the advantages and disadvantages of the single point positioning method and the four points centre and average step length method. ©, 2015, Editorial Office of Nuclear Power Engineering. All right reserved. Source

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