Abstract: Nano-particles 1 of a metal or the like are dispersed in a liquid fluid 2. Thereby, the reactivity or toxicity of the liquid fluid can be reduced when the liquid fluid has reactivity or toxicity. The flow resistance of the liquid fluid can be raised, and the leakage of the liquid fluid from minute cracks can be reduced. By using the liquid fluid as a heat transfer medium of a heat exchanger, the heat transfer performance equivalent to or higher than the heat transfer performance of the original heat exchanger can be obtained.

Abstract: An electromagnetic flowmeter designed to use a smaller excitation device and applicable to measurement on tubular channels of various sectional shapes. The electromagnetic flowmeter includes an excitation device for forming a magnetic field perpendicular to an outer wall of a tubular channel, and a pair of electrodes for measuring an electromotive force generated by the movement of the electroconductive fluid across the magnetic field. The electrodes and two magnetic poles of the excitation device are collectively placed on the outer wall at one side of the tubular channel.

Abstract: An object of the present invention is to provide an electromagnetic flowmeter designed to use a smaller excitation device and applicable to measurement on tubular channels of various sectional shapes. The electromagnetic flowmeter 10 includes an excitation device 11 for forming a magnetic field perpendicular to an outer wall 11b of a tubular channel 1, and a pair of electrodes 2a and 2b for measuring an electromotive force generated by the movement of the electroconductive fluid across the magnetic field. The electrodes 2a and 2b and two magnetic poles of the excitation device 11 are collectively placed on the outer wall 1b at one side of the tubular channel 1.

Abstract: Nano-particles 1 of a metal or the like are dispersed in a liquid fluid 2. Thereby, the reactivity or toxicity of the liquid fluid can be reduced when the liquid fluid has reactivity or toxicity. The flow resistance of the liquid fluid can be raised, and the leakage of the liquid fluid from minute cracks can be reduced. By using the liquid fluid as a heat transfer medium of a heat exchanger, the heat transfer performance equivalent to or higher than the heat transfer performance of the original heat exchanger can be obtained.

Abstract: Nano-particles 1 of a metal or the like are dispersed in a liquid fluid 2. Thereby, the reactivity or toxicity of the liquid fluid can be reduced when the liquid fluid has reactivity or toxicity. The flow resistance of the liquid fluid can be raised, and the leakage of the liquid fluid from minute cracks can be reduced. By using the liquid fluid as a heat transfer medium of a heat exchanger, the heat transfer performance equivalent to or higher than the heat transfer performance of the original heat exchanger can be obtained.

Abstract: In-core nuclear instrumentation for a fast breeder reactor includes a neutron flux measuring unit disposed in a control rod assembly, whereby it is possible to measure a change in in-core neutron flux reliably and highly accurately without requiring a major modification in core design.