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arXiv · 1805.04631

Impact of corrosion on the emissivity of advanced-reactor structural alloys

Jonathan L. King·Hangjin Jo·Alireza Shahsafi·Kyle Blomstrand·Kumar Sridharan·Mikhail A. Kats
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Abstract

Under standard operating conditions, the emissivity of structural alloys used for various components of nuclear reactors may evolve, affecting the heat transfer of the systems. In this study, mid-infrared emissivities of several reactor structural alloys were measured before and after exposure to environments relevant to next-generation reactors. We evaluated nickel-based alloys Haynes 230 and Inconel 617 exposed to helium gas at 1000 $^{\circ}$C, nickel-based Hastelloy N and iron-based 316 stainless steel exposed to molten salts at 750-850 $^{\circ}$C, 316 stainless steel exposed to liquid sodium at 650 $^{\circ}$C, and 316 stainless steel and Haynes 230 exposed to supercritical CO2 at 650 $^{\circ}$C. Emissivity was measured via emissive and reflective techniques using a Fourier transform infrared (FTIR) spectrometer. Large increases in emissivity are observed for alloys exposed to oxidizing environments, while only minor differences were observed in other exposure conditions.

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Jonathan L. King, Hangjin Jo, Alireza Shahsafi, Kyle Blomstrand, Kumar Sridharan, Mikhail A. Kats. 2018-05-12. Impact of corrosion on the emissivity of advanced-reactor structural alloys. https://doi.org/10.1016/j.jnucmat.2018.05.047

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