Uncertainty Analysis for RELAP5-3D

Aaron J. Pawel ; Dr. George L. Mesina

关键词: PROBABILITY DENSITY FUNCTIONS;    SIMULATION;    TOLERANCE;    TRANSIENTS RELAP5-3D;    Uncertainty Analysis;   

DOI  :  10.2172/1042350
RP-ID  :  INL/EXT-11-22936
PID  :  OSTI ID: 1042350
Others  :  TRN: US1202845

美国|英语

来源: SciTech Connect

【 摘 要 】

In its current state, RELAP5-3D is a 'best-estimate' code; it is one of our most reliable programs for modeling what occurs within reactor systems in transients from given initial conditions. This code, however, remains an estimator. A statistical analysis has been performed that begins to lay the foundation for a full uncertainty analysis. By varying the inputs over assumed probability density functions, the output parameters were shown to vary. Using such statistical tools as means, variances, and tolerance intervals, a picture of how uncertain the results are based on the uncertainty of the inputs has been obtained.