Stress analysis of core support post in a very high-temperature reactor

Kenji Kikuchi, Toshimitsu Yokobori, Konomo Sanokawa, Yoshizo Okamoto, Takeo Yokobori

    研究成果: Article査読


    A very high-temperature gas-cooled reactor (VHTR) has been developed by Japan Atomic Energy Research Institute and its core consists of so-called fuel blocks, removable reflector blocks and so on. These graphite blocks are supported by thin cylindrical graphite bars called support posts. These posts are in contact with the blocks through hemispherical seats to absorb the relative displacement of blocks by small inclination or rotation of the posts. Stress distributions and stress concentration coefficients of the support post under the reactor core weight are analysed by means of photoelastic experiment and compared with two-dimensional calculation by using the finite element method. The following are the conclusions we have derived: 1. (1) Stress concentration coefficients of the post are expressed uniquely as a function of Ed( 1 rp- 1 rp) σg regardless of the shapes of model and material properties. 2. (2) Inclination of the post caused by small rotation has little effect on the stress concentration coefficients.

    ジャーナルNuclear Engineering and Design
    出版ステータスPublished - 1983 4

    ASJC Scopus subject areas

    • 核物理学および高エネルギー物理学
    • 原子力エネルギーおよび原子力工学
    • 材料科学(全般)
    • 安全性、リスク、信頼性、品質管理
    • 廃棄物管理と処理
    • 機械工学


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