Uncertainty Analysis for RELAP5-3D

Pawel, Aaron J. ; Mesina, Dr. George L.

Idaho National Laboratory

关键词: Probability Density Functions;    Simulation;    Relap5-3D;    22 General Studies Of Nuclear Reactors;    Transients Relap5-3D;   

DOI  :  10.2172/1042350
RP-ID  :  INL/EXT-11-22936
RP-ID  :  DE-AC07-05ID14517
RP-ID  :  1042350

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来源: UNT Digital Library

【 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.