Applicability of uncertainty quantification and sensitivity analysis for validation of fast reactor plant dynamics analysis code

Hamase, Erina ; Kawamura, Takumi*; Doda, Norihiro  ; Tanaka, Masaaki  

To investigate the applicability of uncertainty quantification (UQ) and sensitivity analysis (SA) methods for validating a fast reactor plant dynamics analysis code, forward UQ and SA employing Sobol' method were performed for FFTF LOFWOS test No.13. The result demonstrated that validity can be judged if the test results fall within the quantified uncertainty range, and that the dominant input parameters influencing uncertainty can be quantitatively evaluated, enabling prioritization of parameters for uncertainty reduction. This confirms the applicability of forward UQ and SA employing Sobol' method.