Silicon Carbide Multilayer Piping for 900°C Supercritical CO₂ Brayton Cycle: Chemical Compatibility in CO₂

Technical Report · Fri Mar 01 04:00:00 EST 2019

DOI:https://doi.org/10.2172/1761976· OSTI ID:1761976

Walker, Matthew S. ^[1]; York, Warren Lee ^[1]; Chames, Jeffrey M. ^[1]; Sugar, Joshua Daniel ^[1]; Frey, Kristen ^[2]; Feinroth, Herb ^[2]; Barringer, Eric ^[2]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
2. Ceramic Tubular Products LLC, Lynchburg, VA (United States)

The US Department of Energy's Office of Nuclear Energy is interested in developing supercritical carbon dioxide (sCO₂) power cycles that can achieve higher cycle efficiencies and lower costs than the traditional steam Rankine cycles. For the application of an sCO2 energy conversion system with a Very High Temperature Gas Reactor (VHTGR), turbine inlet temperatures over 850°C may be required. Consequently, it is necessary to demonstrate structural materials, including turbine inlet piping, that can be code certified at operating temperatures up to 900°C at sCO₂ pressures up to 42 MPa (6100 psi). There are very few metal alloys that retain their strength at these high temperatures, and that are chemically compatible with sCO₂.

• Research Organization: Sandia National Laboratories (SNL-CA), Livermore, CA (United States); Ceramic Tubular Products LLC, Lynchburg, VA (United States)
• Sponsoring Organization: USDOE Office of Nuclear Energy (NE); USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000; NA0003525
• OSTI ID: 1761976
• Report Number(s): SAND--2019-3379; 673811
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
42 ENGINEERING