Thermal-Hydraulic Analysis
Thermal-hydraulic analyses of nuclear plant components and structures are used to determine loadings on related components. Structural Integrity Associates, Inc.(SI) conducts a full array of steady-state and transient thermal-hydraulic analyses, using either standard textbook methods, Computational Fluid Dynamics (CFD) or specialized software, including proprietary software. Examples of complex problems that SI has solved via thermal-hydraulic analyses: Evaluation of severe wall thinning in piping beyond a feedwater heater drain tank found that insufficient back-pressure and two-phase flow conditions were the culprits; analysis of reactor containment pressure-temperature response justified conducting BWR reactor pressure tests at elevated temperatures with open containment; PWR thermocouple test data were evaluated to determine the internal piping flow and stratification conditions that would exist during various operational modes; and analyses have determined stratified flow levels and heat transfer coefficients in piping systems subject to such stratified flow.
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