This paper describes the stress analysis performed to assess structural adequacy of the Clinch River Breeder Reactor (CRBR) core removable shield assemblies. Removable shield assemblies are located in the peripheral region of the core (between blanket assemblies and the fixed radial shield), and are subjected to severe cross-sectional thermal gradients and seismic loads requiring a relatively complex duct load pad design. For cost-effectiveness, the analysis was conducted in two stages. First, an elasto-plastic seismic stress analysis was performed using a detailed nonlinear finite element model (with gaps) of the load pad configuration. Next, in order to determine the total strain accumulation and the creep-fatigue damage the maximum seismic stresses combined with the “worst” thermal stresses from a single assembly model were used to perform a simplified inelastic analysis using two sets of material properties to bound the changing material conditions during reactor operation. This work demonstrated the necessity and applicability of the two simplified analysis techniques in elevated temperature structural design, i.e., the treatment of time-dependent degradation of material properties due to temperature and nuclear irradiation, and the use of time-independent finite element stress analysis results to perform a simplified creep-fatigue analysis.
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Structural Analysis of an LMFBR Shield Assembly Duct Under Thermo-Mechanical and Seismic Loads
S. N. Malik,
S. N. Malik
Aircraft Engine Group, General Electric Company, Cincinnati, Ohio 45215
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V. K. Sazawal
V. K. Sazawal
Advanced Energy Systems Division, Westinghouse Electric Corporation, Madison, Pa. 15663
Search for other works by this author on:
S. N. Malik
Aircraft Engine Group, General Electric Company, Cincinnati, Ohio 45215
V. K. Sazawal
Advanced Energy Systems Division, Westinghouse Electric Corporation, Madison, Pa. 15663
J. Pressure Vessel Technol. May 1986, 108(2): 151-157 (7 pages)
Published Online: May 1, 1986
Article history
Received:
August 7, 1984
Revised:
July 25, 1985
Online:
November 5, 2009
Connected Content
A companion article has been published:
Stokes Roughness Effects on Hydrodynamic Lubrication. Part II—Effects Under Slip Flow Boundary Conditions
Citation
Malik, S. N., and Sazawal, V. K. (May 1, 1986). "Structural Analysis of an LMFBR Shield Assembly Duct Under Thermo-Mechanical and Seismic Loads." ASME. J. Pressure Vessel Technol. May 1986; 108(2): 151–157. https://doi.org/10.1115/1.3264763
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