Uncertainty Calculation on the Response: σ_resp^ND

The sandwich formula allows the propagation of response sensitivities to nuclear data through the covariances matrix, to evaluate the global uncertainty on response due to nuclear data σ_resp^ND(in relative value).

Sandwich Formula:

\[ \sigma_{\text{resp}}^{\text{ND}} = \sqrt{S \cdot Cov \cdot S^t} \]

\(S\): sensitivity vector          \(Cov\): covariance matrix