著者

石川 浩康 宮原 信哉 吉澤 善男

出版者

Atomic Energy Society of Japan

雑誌

日本原子力学会和文論文誌 (ISSN:13472879)

巻号頁・発行日

vol.7, no.4, pp.452-461, 2008 (Released:2012-03-02)

参考文献数

7

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Supercritical carbon dioxide (CO2) is being investigated as a material for a secondary cooling system of sodium (Na)-cooled fast reactor to avoid Na/water reaction. In this type of reactor, however, it is necessary to consider the consequences of Na/CO2 reaction, which might occur in the case of tube rupture in a heat exchanger between primary and secondary systems. Experiments were carried out with test equipment for the Na/CO2 reaction, which can handle 1-5 g order of Na and measure temperatures using thermocouples. The solid products of the Na/CO2 reaction sampled from the equipment were analyzed by X-ray diffraction (XRD) and chemical analysis. The parts of exhaust gases were analyzed by gas chromatography. From these experimental results, we proved that the reaction proceeded between liquid Na and CO2. The Na/CO2 reaction stopped only the pool surface reaction with a small quantity of aerosol emission when the initial temperature of Na was lower than 570°C. On the other hand, the reaction continuously proceeded with an orange-colored flame and aerosol release when the Na initial temperature was higher than 580°C, and the reaction products expanded to the margin of the Na pool tray.

著者

越後 亮三 富村 寿夫 吉澤 善男 陣内 秀信

出版者

九州大学

雑誌

九州大学機能物質科学研究所報告 (ISSN:09143793)

巻号頁・発行日

vol.2, no.1, pp.53-66, 1988-06-30

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A numerical analysis has been performed on combined convective and radiative heat transfer in a circular tube flow system with porous medium, taking account of gaseous radiation and incoming radiations. Results for temperature and radiative heat flux distributions are presented and compared with those of a non-radiating gas. Extensive discussion is also given on the influences of those radiations on the recaptured energy at tube inlet section.