The Sensitivity Analysis Module for SCALE (SAMS) calculates sensitivity coefficients that predict the expected changes of the calculated value of keff due to perturbations in constituent cross-section data. Additionally, the uncertainty in keff due to cross-section-covariance data can be predicted. SAMS performs sensitivity calculations using linear perturbation theory and requires the calculation of the forward and adjoint flux moments. Sensitivity coefficients computed by SAMS also include the implicit effect due to resonance self-shielding calculations. The SAMS module works in conjunction with XSDRNPM, KENO V.a or KENO-VI, which are capable of calculating keff, angular fluxes, angular flux moments and/or mesh fluxes. The implicit calculations are performed with data generated by combination of the BONAMIST, NITAWSLST and SENLIB codes specially developed to produce resonance self-shielded cross sections and their sensitivities to input data.
SAMS automatically selects all of the sensitivity parameters that can be calculated for each nuclide in each region of the system based on available cross-section data. Sensitivity parameters for a given nuclide may be generated for a number of parameters, including total, scatter, capture, and fission cross sections, as well as and . The uncertainty information is produced for all processes available on the cross-section-covariance data file.
SAMS has been designed for automated operation with the TSUNAMI-1D, TSUNAMI-3D-K5 and TSUNAMI-3D-K6 SCALE control modules and produces data suitable for use with the TSUNAMI-IP, TSURFER, and TSAR modules.