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Journal Articles

Thermophysical properties of sodium-concrete reaction products

Kawaguchi, Munemichi; Miyahara, Shinya; Uno, Masayoshi*

Netsu Sokutei, 45(1), p.2 - 8, 2018/01

Liquid sodium (Na) has been used as the coolant of fast reactors for the various merits, such as the high thermal conductivity. On the other hand, it is postulated that a steel liner may fail and lead to a sodium-concrete reaction (SCR) during the Na-leak accident. Because of concrete ablation and release of hydrogen gas due to the chemical reactions between Na and concrete components, the SCR is one of the important phenomena in the Na-leak accident. In the study, fundamental experiments related to the SCR were performed using Na and concrete powder. Here, the used concrete powder is milled siliceous concrete which is usually used as the structural concrete in Japanese nuclear power plants. The obvious temperature changes at 3 temperature regions were observed for the reaction process such as Na-melt, NaOH-SiO$$_{2}$$ and Na-H$$_{2}$$O-SiO$$_{2}$$ reaction, which occurred around 100, 300 and 500$$^{circ}$$C, respectively. Especially, the violent reaction around 500$$^{circ}$$C caused the temperature peak to $$836 sim 853^{circ}$$C, and the reaction heat of $$0.15 sim 0.23$$ kW/g was estimated under the Na-concrete mixing ratio such as $$gammaapprox 0.32$$. The main components of the reaction products was identified as Na$$_{2}$$SiO$$_{3}$$ with X-ray diffraction technique. Moreover, the measured thermophysical properties such as melting point, density, specific heat, thermal conductivity and viscosity were similar to those of $$x$$Na$$_{2}$$O-$$(1-x)$$SiO$$_{2}$$ ($$xleq 0.5$$).

Journal Articles

Application of thermal analysis in research and development of sodium-cooled fast reactor

Kikuchi, Shin; Koga, Nobuyoshi*

Netsu Sokutei, 43(1), p.11 - 18, 2016/00

This paper describes the study on sodium-concrete reaction behavior, which is one of the example of the application of thermal analysis in research and development of sodium-cooled fast reactor (SFR).

Journal Articles

On the radioactivity measurements by thermal energy measurements

Genka, Tsuguo

Oyo Netsu Bunseki; Kobunshi, Iyaku, Denshi Zairyo Nado 100-Shu No Sokutei Deta Kaisetsushu, 0, p.206 - 207, 1996/00

no abstracts in English

Journal Articles

Journal Articles

Isoperibol type,Laser-Flash calorimeter for precise heat-capacity measurement

*; *; ; *

Netsu Sokutei, 7(4), p.107 - 111, 1980/00

no abstracts in English

Journal Articles

Research of Heat Science of Land University Sunner Laboratory; Thermal Scientific Research on $$beta$$-Propiolactone as an Example

Netsu, Ondo Sokutei To Shisa Netsu Bunseki, p.77 - 95, 1971/00

no abstracts in English

Journal Articles

Thermochemistry Research of Lund University Sunner Laboratory;A Thermochemistry Research on $$beta$$-Propiolactone as an Example

Netsu, Ondo Sokutei To Shisa Netsu Bunseki, p.77 - 95, 1970/00

no abstracts in English

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